15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- LiteralSupport.cpp - Code to parse and process literals ----------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the NumericLiteralParser, CharLiteralParser, and 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// StringLiteralParser interfaces. 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/LiteralSupport.h" 163f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose#include "clang/Basic/CharInfo.h" 1755fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Basic/TargetInfo.h" 1855fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/LexDiagnostic.h" 1955fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Lex/Preprocessor.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/ADT/StringExtras.h" 21cb5620c9b213f4bd323912159fdddda35e258a14Dmitri Gribenko#include "llvm/Support/ConvertUTF.h" 229fe8c74a93ac8e92512615c5f83e7a328b3b0544David Blaikie#include "llvm/Support/ErrorHandling.h" 23cb5620c9b213f4bd323912159fdddda35e258a14Dmitri Gribenko 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 265cee1195584fa8672253139c86e922daeda69b9eDouglas Gregorstatic unsigned getCharWidth(tok::TokenKind kind, const TargetInfo &Target) { 275cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor switch (kind) { 28b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie default: llvm_unreachable("Unknown token type!"); 295cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::char_constant: 305cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::string_literal: 315cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf8_string_literal: 325cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getCharWidth(); 335cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::wide_char_constant: 345cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::wide_string_literal: 355cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getWCharWidth(); 365cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf16_char_constant: 375cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf16_string_literal: 385cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getChar16Width(); 395cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf32_char_constant: 405cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf32_string_literal: 415cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getChar32Width(); 425cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 435cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor} 445cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 455bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrellstatic CharSourceRange MakeCharSourceRange(const LangOptions &Features, 465bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell FullSourceLoc TokLoc, 475bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell const char *TokBegin, 485bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell const char *TokRangeBegin, 495bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell const char *TokRangeEnd) { 505bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell SourceLocation Begin = 515bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell Lexer::AdvanceToTokenCharacter(TokLoc, TokRangeBegin - TokBegin, 525bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell TokLoc.getManager(), Features); 535bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell SourceLocation End = 545bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell Lexer::AdvanceToTokenCharacter(Begin, TokRangeEnd - TokRangeBegin, 555bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell TokLoc.getManager(), Features); 565bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell return CharSourceRange::getCharRange(Begin, End); 575bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell} 585bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell 59e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith/// \brief Produce a diagnostic highlighting some portion of a literal. 60e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith/// 61e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith/// Emits the diagnostic \p DiagID, highlighting the range of characters from 62e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith/// \p TokRangeBegin (inclusive) to \p TokRangeEnd (exclusive), which must be 63e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith/// a substring of a spelling buffer for the token beginning at \p TokBegin. 64e5f0588840b20897631cc8110344fd2745ef4caaRichard Smithstatic DiagnosticBuilder Diag(DiagnosticsEngine *Diags, 65e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const LangOptions &Features, FullSourceLoc TokLoc, 66e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const char *TokBegin, const char *TokRangeBegin, 67e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const char *TokRangeEnd, unsigned DiagID) { 68e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith SourceLocation Begin = 69e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Lexer::AdvanceToTokenCharacter(TokLoc, TokRangeBegin - TokBegin, 70e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith TokLoc.getManager(), Features); 715bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell return Diags->Report(Begin, DiagID) << 725bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell MakeCharSourceRange(Features, TokLoc, TokBegin, TokRangeBegin, TokRangeEnd); 73e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith} 74e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ProcessCharEscape - Parse a standard C escape sequence, which can occur in 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// either a character or a string literal. 77e5f0588840b20897631cc8110344fd2745ef4caaRichard Smithstatic unsigned ProcessCharEscape(const char *ThisTokBegin, 78e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const char *&ThisTokBuf, 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd, bool &HadError, 805cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor FullSourceLoc Loc, unsigned CharWidth, 81e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith DiagnosticsEngine *Diags, 82e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const LangOptions &Features) { 83e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const char *EscapeBegin = ThisTokBuf; 84e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip the '\' char. 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that this character can't be off the end of the buffer, because 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that would have been \", which would not have been the end of string. 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar = *ThisTokBuf++; 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (ResultChar) { 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These map to themselves. 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '\\': case '\'': case '"': case '?': break; 941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These have fixed mappings. 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'a': 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R: the meaning of '\\a' is different in traditional C 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 7; 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'b': 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 8; 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'e': 10491f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 105e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 106e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::ext_nonstandard_escape) << "e"; 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 27; 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1093c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman case 'E': 11091f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 111e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 112e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::ext_nonstandard_escape) << "E"; 1133c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman ResultChar = 27; 1143c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman break; 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'f': 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 12; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'n': 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 10; 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'r': 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 13; 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 't': 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 9; 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'v': 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 11; 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'x': { // Hex escape. 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1323f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose if (ThisTokBuf == ThisTokEnd || !isHexDigit(*ThisTokBuf)) { 13391f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 134e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 1355209e2bc4d18e679dcacfd6f6a0120aa1d4a757fJordan Rose diag::err_hex_escape_no_digits) << "x"; 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = 1; 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Hex escapes are a maximal series of hex digits. 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Overflow = false; 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; ThisTokBuf != ThisTokEnd; ++ThisTokBuf) { 143728bb4c41844b1df98eb35e7fa98eb5ffa9d65a6Jordan Rose int CharVal = llvm::hexDigitValue(ThisTokBuf[0]); 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharVal == -1) break; 145c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // About to shift out a digit? 146c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner Overflow |= (ResultChar & 0xF0000000) ? true : false; 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 4; 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= CharVal; 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See if any bits will be truncated when evaluated as a character. 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Overflow = true; 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. 15891f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Overflow && Diags) // Too many digits to fit in 159e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 160b3da613977f6b77dee2b382eeff5713168a4ca18Eli Friedman diag::err_hex_escape_too_large); 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '0': case '1': case '2': case '3': 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '4': case '5': case '6': case '7': { 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes. 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --ThisTokBuf; 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes are a series of octal digits with maximum length 3. 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // "\0123" is a two digit sequence equal to "\012" "3". 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumDigits = 0; 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 3; 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= *ThisTokBuf++ - '0'; 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumDigits; 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && NumDigits < 3 && 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisTokBuf[0] >= '0' && ThisTokBuf[0] <= '7'); 1781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. Reject '\777', but not L'\777'. 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 18191f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 182e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 183b3da613977f6b77dee2b382eeff5713168a4ca18Eli Friedman diag::err_octal_escape_too_large); 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, these are not valid escapes. 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '(': case '{': case '[': case '%': 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // GCC accepts these as extensions. We warn about them as such though. 19291f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 193e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 194e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::ext_nonstandard_escape) 195e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith << std::string(1, ResultChar); 196f01fdff97b245caac98100d232c760b4d0531411Eli Friedman break; 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 19891f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags == 0) 199b90f4b3fb94056609da9cca5eef7358d95a363b2Douglas Gregor break; 200e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith 2013f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose if (isPrintable(ResultChar)) 202e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 203e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::ext_unknown_escape) 204e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith << std::string(1, ResultChar); 205ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner else 206e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, EscapeBegin, ThisTokBuf, 207e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::ext_unknown_escape) 208e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith << "x" + llvm::utohexstr(ResultChar); 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ResultChar; 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2150e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// ProcessUCNEscape - Read the Universal Character Name, check constraints and 21659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// return the UTF32. 21726b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smithstatic bool ProcessUCNEscape(const char *ThisTokBegin, const char *&ThisTokBuf, 21826b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith const char *ThisTokEnd, 21959705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber uint32_t &UcnVal, unsigned short &UcnLen, 220d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie FullSourceLoc Loc, DiagnosticsEngine *Diags, 221be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell const LangOptions &Features, 222be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell bool in_char_string_literal = false) { 22326b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith const char *UcnBegin = ThisTokBuf; 2241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2250e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Skip the '\u' char's. 2260e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ThisTokBuf += 2; 2270e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 2283f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose if (ThisTokBuf == ThisTokEnd || !isHexDigit(*ThisTokBuf)) { 2296c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner if (Diags) 230e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, UcnBegin, ThisTokBuf, 2315209e2bc4d18e679dcacfd6f6a0120aa1d4a757fJordan Rose diag::err_hex_escape_no_digits) << StringRef(&ThisTokBuf[-1], 1); 23259705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber return false; 2330e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 23459705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber UcnLen = (ThisTokBuf[-1] == 'u' ? 4 : 8); 23556bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian unsigned short UcnLenSave = UcnLen; 23659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber for (; ThisTokBuf != ThisTokEnd && UcnLenSave; ++ThisTokBuf, UcnLenSave--) { 237728bb4c41844b1df98eb35e7fa98eb5ffa9d65a6Jordan Rose int CharVal = llvm::hexDigitValue(ThisTokBuf[0]); 2380e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (CharVal == -1) break; 2390e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal <<= 4; 2400e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal |= CharVal; 2410e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 2420e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // If we didn't consume the proper number of digits, there is a problem. 24359705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber if (UcnLenSave) { 244e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (Diags) 245e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, UcnBegin, ThisTokBuf, 246e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::err_ucn_escape_incomplete); 24759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber return false; 2480e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 24926b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith 250be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // Check UCN constraints (C99 6.4.3p2) [C++11 lex.charset p2] 25126b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if ((0xD800 <= UcnVal && UcnVal <= 0xDFFF) || // surrogate codepoints 25226b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith UcnVal > 0x10FFFF) { // maximum legal UTF32 value 25326b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if (Diags) 254e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, UcnBegin, ThisTokBuf, 255e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::err_ucn_escape_invalid); 25626b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith return false; 25726b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith } 258be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 259be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // C++11 allows UCNs that refer to control characters and basic source 260be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // characters inside character and string literals 26126b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if (UcnVal < 0xa0 && 26226b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith (UcnVal != 0x24 && UcnVal != 0x40 && UcnVal != 0x60)) { // $, @, ` 26380ad52f327b532bded5c5b0ee38779d841c6cd35Richard Smith bool IsError = (!Features.CPlusPlus11 || !in_char_string_literal); 26426b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if (Diags) { 26526b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith char BasicSCSChar = UcnVal; 26626b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if (UcnVal >= 0x20 && UcnVal < 0x7f) 267e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, UcnBegin, ThisTokBuf, 268e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith IsError ? diag::err_ucn_escape_basic_scs : 269e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::warn_cxx98_compat_literal_ucn_escape_basic_scs) 270e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith << StringRef(&BasicSCSChar, 1); 27126b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith else 272e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, UcnBegin, ThisTokBuf, 273e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith IsError ? diag::err_ucn_control_character : 274e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith diag::warn_cxx98_compat_literal_ucn_control_character); 275be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 27626b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if (IsError) 27726b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith return false; 278be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 279be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 280e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (!Features.CPlusPlus && !Features.C99 && Diags) 281e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diag(Diags, Features, Loc, ThisTokBegin, UcnBegin, ThisTokBuf, 282bfec916e5fc40f22ac11267e78a024cd8dcf3bbfJordan Rose diag::warn_ucn_not_valid_in_c89_literal); 283e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith 28459705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber return true; 28559705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber} 28659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber 287df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith/// MeasureUCNEscape - Determine the number of bytes within the resulting string 288df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith/// which this UCN will occupy. 289df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smithstatic int MeasureUCNEscape(const char *ThisTokBegin, const char *&ThisTokBuf, 290df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith const char *ThisTokEnd, unsigned CharByteWidth, 291df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith const LangOptions &Features, bool &HadError) { 292df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // UTF-32: 4 bytes per escape. 293df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (CharByteWidth == 4) 294df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return 4; 295df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 296df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith uint32_t UcnVal = 0; 297df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith unsigned short UcnLen = 0; 298df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith FullSourceLoc Loc; 299df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 300df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (!ProcessUCNEscape(ThisTokBegin, ThisTokBuf, ThisTokEnd, UcnVal, 301df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith UcnLen, Loc, 0, Features, true)) { 302df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith HadError = true; 303df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return 0; 304df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith } 305df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 306df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // UTF-16: 2 bytes for BMP, 4 bytes otherwise. 307df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (CharByteWidth == 2) 308df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return UcnVal <= 0xFFFF ? 2 : 4; 309df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 310df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // UTF-8. 311df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (UcnVal < 0x80) 312df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return 1; 313df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (UcnVal < 0x800) 314df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return 2; 315df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (UcnVal < 0x10000) 316df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return 3; 317df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return 4; 318df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith} 319df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 32059705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// EncodeUCNEscape - Read the Universal Character Name, check constraints and 32159705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// convert the UTF32 to UTF8 or UTF16. This is a subroutine of 32259705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// StringLiteralParser. When we decide to implement UCN's for identifiers, 32359705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// we will likely rework our support for UCN's. 32426b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smithstatic void EncodeUCNEscape(const char *ThisTokBegin, const char *&ThisTokBuf, 32526b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith const char *ThisTokEnd, 326a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner char *&ResultBuf, bool &HadError, 3275cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor FullSourceLoc Loc, unsigned CharByteWidth, 328d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie DiagnosticsEngine *Diags, 329d6471f7c1921c7802804ce3ff6fe9768310f72b9David Blaikie const LangOptions &Features) { 33059705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber typedef uint32_t UTF32; 33159705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber UTF32 UcnVal = 0; 33259705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber unsigned short UcnLen = 0; 33326b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if (!ProcessUCNEscape(ThisTokBegin, ThisTokBuf, ThisTokEnd, UcnVal, UcnLen, 33426b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith Loc, Diags, Features, true)) { 335df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith HadError = true; 3360e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 3370e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 33859705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber 3395cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth) && 3405cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor "only character widths of 1, 2, or 4 bytes supported"); 341a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber 3425cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor (void)UcnLen; 3435cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert((UcnLen== 4 || UcnLen== 8) && "only ucn length of 4 or 8 supported"); 3445cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 3455cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (CharByteWidth == 4) { 346caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // FIXME: Make the type of the result buffer correct instead of 347caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // using reinterpret_cast. 348caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman UTF32 *ResultPtr = reinterpret_cast<UTF32*>(ResultBuf); 349caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman *ResultPtr = UcnVal; 350caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman ResultBuf += 4; 3515cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return; 3525cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 353a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber 3545cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (CharByteWidth == 2) { 355caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // FIXME: Make the type of the result buffer correct instead of 356caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // using reinterpret_cast. 357caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman UTF16 *ResultPtr = reinterpret_cast<UTF16*>(ResultBuf); 358caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman 35959b26d84b64510158e23d80eba077b844b7e0b04Richard Smith if (UcnVal <= (UTF32)0xFFFF) { 360caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman *ResultPtr = UcnVal; 361caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman ResultBuf += 2; 362a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber return; 363a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber } 364a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber 365caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // Convert to UTF16. 366a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber UcnVal -= 0x10000; 367caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman *ResultPtr = 0xD800 + (UcnVal >> 10); 368caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman *(ResultPtr+1) = 0xDC00 + (UcnVal & 0x3FF); 369caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman ResultBuf += 4; 37056bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian return; 37156bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian } 3725cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 3735cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(CharByteWidth == 1 && "UTF-8 encoding is only for 1 byte characters"); 3745cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 3750e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Now that we've parsed/checked the UCN, we convert from UTF32->UTF8. 3760e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // The conversion below was inspired by: 3770e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.c 3781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // First, we determine how many bytes the result will require. 3794e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff typedef uint8_t UTF8; 3800e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 3810e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff unsigned short bytesToWrite = 0; 3820e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (UcnVal < (UTF32)0x80) 3830e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 1; 3840e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x800) 3850e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 2; 3860e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x10000) 3870e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 3; 3880e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else 3890e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 4; 3901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3910e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMask = 0xBF; 3920e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMark = 0x80; 3931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3940e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Once the bits are split out into bytes of UTF8, this is a mask OR-ed 3958a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff // into the first byte, depending on how many bytes follow. 3961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump static const UTF8 firstByteMark[5] = { 3978a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff 0x00, 0x00, 0xC0, 0xE0, 0xF0 3980e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff }; 3990e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Finally, we write the bytes into ResultBuf. 4000e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 4010e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff switch (bytesToWrite) { // note: everything falls through. 4025d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer case 4: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 4035d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer case 3: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 4045d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer case 2: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 4055d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer case 1: *--ResultBuf = (UTF8) (UcnVal | firstByteMark[bytesToWrite]); 4060e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 4070e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Update the buffer. 4080e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 4090e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff} 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-constant: [C99 6.4.4.1] 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant integer-suffix 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant integer-suffix 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant integer-suffix 4164ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// binary-literal integer-suffix [GNU, C++1y] 41749d517467c3dcd2c67e8a6c740ba5160e37625f7Richard Smith/// user-defined-integer-literal: [C++11 lex.ext] 418b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith/// decimal-literal ud-suffix 419b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith/// octal-literal ud-suffix 420b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith/// hexadecimal-literal ud-suffix 4214ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// binary-literal ud-suffix [GNU, C++1y] 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// decimal-constant: 4235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant digit 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// octal-constant: 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant octal-digit 4281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// hexadecimal-constant: 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix hexadecimal-digit 4305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant hexadecimal-digit 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix: one of 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0x 0X 4334ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// binary-literal: 4344ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// 0b binary-digit 4354ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// 0B binary-digit 4364ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// binary-literal binary-digit 4375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-suffix: 4385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-suffix] 4395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-long-suffix] 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix [unsigned-suffix] 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix [unsigned-sufix] 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit: 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1 2 3 4 5 6 7 8 9 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit: 4455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-digit: 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 8 9 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a b c d e f 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// A B C D E F 4504ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// binary-digit: 4514ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// 0 4524ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// 1 4535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix: one of 4545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// u U 4555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix: one of 4565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// l L 4571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// long-long-suffix: one of 4585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ll LL 4595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 4605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// floating-constant: [C99 6.4.4.2] 4615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// TODO: add rules... 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 463fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri GribenkoNumericLiteralParser::NumericLiteralParser(StringRef TokSpelling, 464fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko SourceLocation TokLoc, 465fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko Preprocessor &PP) 466fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko : PP(PP), ThisTokBegin(TokSpelling.begin()), ThisTokEnd(TokSpelling.end()) { 4671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 468c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // This routine assumes that the range begin/end matches the regex for integer 469c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // and FP constants (specifically, the 'pp-number' regex), and assumes that 470c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // the byte at "*end" is both valid and not part of the regex. Because of 471c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // this, it doesn't have to check for 'overscan' in various places. 4723f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose assert(!isPreprocessingNumberBody(*ThisTokEnd) && "didn't maximally munch?"); 4731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 474fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko s = DigitsBegin = ThisTokBegin; 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = false; 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = false; 477b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith saw_ud_suffix = false; 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = false; 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isUnsigned = false; 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLongLong = false; 4816e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = false; 482506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = false; 483b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = false; 4845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 4851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '0') { // parse radix 487368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ParseNumberStartingWithZero(TokLoc); 488368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (hadError) 489368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { // the first digit is non-zero 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 4953f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose } else if (isHexDigit(*s) && !(*s == 'e' || *s == 'E')) { 496fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s - ThisTokBegin), 4975f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner diag::err_invalid_decimal_digit) << StringRef(s, 1); 498ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 5041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 5054411f46050216a139ab2fc7ff145ec384d11ec7fChris Lattner if ((*s == 'e' || *s == 'E')) { // exponent 50670f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 5110b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 5130b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 514fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent - ThisTokBegin), 515ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 516ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 5170b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SuffixBegin = s; 5231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 524506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Parse the suffix. At this point we can classify whether we have an FP or 525506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // integer constant. 526506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner bool isFPConstant = isFloatingLiteral(); 5274ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith const char *ImaginarySuffixLoc = 0; 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 529506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Loop over all of the characters of the suffix. If we see something bad, 530506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // we break out of the loop. 531506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner for (; s != ThisTokEnd; ++s) { 532506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner switch (*s) { 533506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'f': // FP Suffix for "float" 534506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'F': 535506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (!isFPConstant) break; // Error for integer constant. 5366e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat || isLong) break; // FF, LF invalid. 5376e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = true; 538506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 539506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'u': 540506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'U': 541506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // Error for floating constant. 542506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isUnsigned) break; // Cannot be repeated. 543506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isUnsigned = true; 544506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 545506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'l': 546506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'L': 547506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isLong || isLongLong) break; // Cannot be repeated. 5486e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat) break; // LF invalid. 5491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 550506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Check for long long. The L's need to be adjacent and the same case. 551506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s+1 != ThisTokEnd && s[1] == s[0]) { 552506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // long long invalid for floats. 553506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isLongLong = true; 554506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner ++s; // Eat both of them. 555506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } else { 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = true; 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 558506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 559506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'i': 560c637415a96c16abc7e28ef83c6c105716f7e8936Chris Lattner case 'I': 5614e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (PP.getLangOpts().MicrosoftExt) { 562a8be02b655b76e4dbe776b0c62bc3c450dc6feabFariborz Jahanian if (isFPConstant || isLong || isLongLong) break; 5636e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes 5640c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // Allow i8, i16, i32, i64, and i128. 565b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump if (s + 1 != ThisTokEnd) { 566b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump switch (s[1]) { 567b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '8': 568b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump s += 2; // i8 suffix 569b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = true; 5706e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 571b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '1': 5726e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 573d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[2] == '6') { 574d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 3; // i16 suffix 575d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 576d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 5776e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes else if (s[2] == '2') { 5786e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 3 == ThisTokEnd) break; 579d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[3] == '8') { 580d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 4; // i128 suffix 581d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 582d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 583b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump } 5846e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 585b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '3': 5866e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 587d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[2] == '2') { 588d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 3; // i32 suffix 589d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isLong = true; 590d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 591d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 5926e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 593b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '6': 5946e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 595d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[2] == '4') { 596d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 3; // i64 suffix 597d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isLongLong = true; 598d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 599d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 6006e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 601b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump default: 602b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump break; 603b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump } 604b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump break; 6050c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 6060c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 6070c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // fall through. 608506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'j': 609506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'J': 610506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isImaginary) break; // Cannot be repeated. 611506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = true; 6124ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith ImaginarySuffixLoc = s; 613506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 615b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith // If we reached here, there was an error or a ud-suffix. 616506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner break; 617506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } 6181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 619506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s != ThisTokEnd) { 6204ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith if (isValidUDSuffix(PP.getLangOpts(), 6214ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith StringRef(SuffixBegin, ThisTokEnd - SuffixBegin))) { 6224ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith // Any suffix pieces we might have parsed are actually part of the 6234ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith // ud-suffix. 6244ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith isLong = false; 6254ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith isUnsigned = false; 6264ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith isLongLong = false; 6274ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith isFloat = false; 6284ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith isImaginary = false; 6294ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith isMicrosoftInteger = false; 6304ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith 631b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith saw_ud_suffix = true; 632b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith return; 633b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith } 634b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith 635b453ad3214d00acc51c9aa702c76c58354d84b84Richard Smith // Report an error if there are any. 636fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, SuffixBegin - ThisTokBegin), 637ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner isFPConstant ? diag::err_invalid_suffix_float_constant : 638ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_suffix_integer_constant) 6395f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner << StringRef(SuffixBegin, ThisTokEnd-SuffixBegin); 640ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 641506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner return; 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6434ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith 6444ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith if (isImaginary) { 6454ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, 6464ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith ImaginarySuffixLoc - ThisTokBegin), 6474ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith diag::ext_imaginary_constant); 6484ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith } 6494ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith} 6504ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith 6514ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// Determine whether a suffix is a valid ud-suffix. We avoid treating reserved 6524ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// suffixes as ud-suffixes, because the diagnostic experience is better if we 6534ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith/// treat it as an invalid suffix. 6544ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smithbool NumericLiteralParser::isValidUDSuffix(const LangOptions &LangOpts, 6554ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith StringRef Suffix) { 6564ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith if (!LangOpts.CPlusPlus11 || Suffix.empty()) 6574ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith return false; 6584ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith 6594ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith // By C++11 [lex.ext]p10, ud-suffixes starting with an '_' are always valid. 6604ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith if (Suffix[0] == '_') 6614ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith return true; 6624ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith 6634ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith // In C++11, there are no library suffixes. 6644ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith if (!LangOpts.CPlusPlus1y) 6654ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith return false; 6664ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith 6674ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith // In C++1y, "s", "h", "min", "ms", "us", and "ns" are used in the library. 6684ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith return llvm::StringSwitch<bool>(Suffix) 6694ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith .Cases("h", "min", "s", true) 6704ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith .Cases("ms", "us", "ns", true) 6714ac537b0f07f2efb9fcf081f60d54e6cfb1cf2d5Richard Smith .Default(false); 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 674368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// ParseNumberStartingWithZero - This method is called when the first character 675368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// of the number is found to be a zero. This means it is either an octal 676368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// number (like '04') or a hex number ('0x123a') a binary number ('0b1010') or 6771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// a floating point number (01239.123e4). Eat the prefix, determining the 678368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// radix etc. 679368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattnervoid NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) { 680368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner assert(s[0] == '0' && "Invalid method call"); 681368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 6821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 683368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle a hex number like 0x1234. 6843f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose if ((*s == 'x' || *s == 'X') && (isHexDigit(s[1]) || s[1] == '.')) { 685368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 686368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 16; 687368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 688368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 68966b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman bool noSignificand = (s == DigitsBegin); 690368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 691368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 692368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (*s == '.') { 693368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 694368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 69566b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman const char *floatDigitsBegin = s; 696368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 69766b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman noSignificand &= (floatDigitsBegin == s); 69866b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman } 69966b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman 70066b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman if (noSignificand) { 701fc97ea29b1afd9e87341bce2b0cbb0c7172b7dd8Dmitri Gribenko PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s - ThisTokBegin), 70266b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman diag::err_hexconstant_requires_digits); 70366b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman hadError = true; 70466b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman return; 705368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 70666b0ebac276353f3ff7d41eaba3e6d24d48663b7Aaron Ballman 707368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // A binary exponent can appear with or with a '.'. If dotted, the 7081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // binary exponent is required. 7091155c42e7b1b4e401bb0a331a6d715d637958c75Douglas Gregor if (*s == 'p' || *s == 'P') { 710368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 711368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 712368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 713368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 714368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 7156ea623823f8532670480425b573f35115404b4a0Chris Lattner if (first_non_digit == s) { 716ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 717ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 718ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 7196ea623823f8532670480425b573f35115404b4a0Chris Lattner return; 720368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 7216ea623823f8532670480425b573f35115404b4a0Chris Lattner s = first_non_digit; 7221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7234e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (!PP.getLangOpts().HexFloats) 724ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(TokLoc, diag::ext_hexconstant_invalid); 725368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (saw_period) { 726ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 727ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_hexconstant_requires_exponent); 728ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 729368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 730368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 731368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 7321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 733368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle simple binary numbers 0b01010 734368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'b' || *s == 'B') { 7352fcf0de8a122ddb265d8c32d6ac1012c070e4f24Richard Smith // 0b101010 is a C++1y / GCC extension. 7362fcf0de8a122ddb265d8c32d6ac1012c070e4f24Richard Smith PP.Diag(TokLoc, 7372fcf0de8a122ddb265d8c32d6ac1012c070e4f24Richard Smith PP.getLangOpts().CPlusPlus1y 7382fcf0de8a122ddb265d8c32d6ac1012c070e4f24Richard Smith ? diag::warn_cxx11_compat_binary_literal 7392fcf0de8a122ddb265d8c32d6ac1012c070e4f24Richard Smith : PP.getLangOpts().CPlusPlus 7402fcf0de8a122ddb265d8c32d6ac1012c070e4f24Richard Smith ? diag::ext_binary_literal_cxx1y 7412fcf0de8a122ddb265d8c32d6ac1012c070e4f24Richard Smith : diag::ext_binary_literal); 742368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ++s; 743368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 2; 744368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 745368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipBinaryDigits(s); 746368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 747368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 7483f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose } else if (isHexDigit(*s)) { 749ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 7505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner diag::err_invalid_binary_digit) << StringRef(s, 1); 751ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 752368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 753413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // Other suffixes will be diagnosed by the caller. 754368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 755368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 7561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 757368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // For now, the radix is set to 8. If we discover that we have a 758368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // floating point constant, the radix will change to 10. Octal floating 7591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // point constants are not permitted (only decimal and hexadecimal). 760368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 8; 761368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 762368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipOctalDigits(s); 763368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) 764368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; // Done, simple octal number like 01234 7651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 766413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have some other non-octal digit that *is* a decimal digit, see if 767413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // this is part of a floating point number like 094.123 or 09e1. 7683f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose if (isDigit(*s)) { 769413d355e38755a71f106dbc0ac900ca989070916Chris Lattner const char *EndDecimal = SkipDigits(s); 770413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (EndDecimal[0] == '.' || EndDecimal[0] == 'e' || EndDecimal[0] == 'E') { 771413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = EndDecimal; 772413d355e38755a71f106dbc0ac900ca989070916Chris Lattner radix = 10; 773413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 774413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 7751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 776413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have a hex digit other than 'e' (which denotes a FP exponent) then 777413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // the code is using an incorrect base. 7783f6f51e28231f65de9c2dd150a2d757b2162cfa3Jordan Rose if (isHexDigit(*s) && *s != 'e' && *s != 'E') { 779ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 7805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner diag::err_invalid_octal_digit) << StringRef(s, 1); 781ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 782368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 783368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 7841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 785368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '.') { 786368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 787368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 788368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 789413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = SkipDigits(s); // Skip suffix. 790368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 791368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'e' || *s == 'E') { // exponent 792368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 793368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 794368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 795368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 796368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 797368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 798368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (first_non_digit != s) { 799368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = first_non_digit; 800368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else { 8011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 802ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 803ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 804368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 805368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 806368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 807368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner} 808368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 8092fd6956fd3020cdaf7452ee68435376125c60355Jordan Rosestatic bool alwaysFitsInto64Bits(unsigned Radix, unsigned NumDigits) { 810191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko switch (Radix) { 811191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko case 2: 812191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko return NumDigits <= 64; 813191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko case 8: 814191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko return NumDigits <= 64 / 3; // Digits are groups of 3 bits. 815191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko case 10: 816191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko return NumDigits <= 19; // floor(log10(2^64)) 817191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko case 16: 818191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko return NumDigits <= 64 / 4; // Digits are groups of 4 bits. 819191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko default: 820191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko llvm_unreachable("impossible Radix"); 821191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko } 822191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko} 823368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 8245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// GetIntegerValue - Convert this numeric literal value to an APInt that 8255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// matches Val's input width. If there is an overflow, set Val to the low bits 8265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// of the result and return true. Otherwise, return false. 8275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool NumericLiteralParser::GetIntegerValue(llvm::APInt &Val) { 828a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // Fast path: Compute a conservative bound on the maximum number of 829a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // bits per digit in this radix. If we can't possibly overflow a 830a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // uint64 based on that bound then do the simple conversion to 831a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // integer. This avoids the expensive overflow checking below, and 832a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // handles the common cases that matter (small decimal integers and 833a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // hex/octal values which don't overflow). 834191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko const unsigned NumDigits = SuffixBegin - DigitsBegin; 8352fd6956fd3020cdaf7452ee68435376125c60355Jordan Rose if (alwaysFitsInto64Bits(radix, NumDigits)) { 836a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar uint64_t N = 0; 837191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko for (const char *Ptr = DigitsBegin; Ptr != SuffixBegin; ++Ptr) 838728bb4c41844b1df98eb35e7fa98eb5ffa9d65a6Jordan Rose N = N * radix + llvm::hexDigitValue(*Ptr); 839a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 840a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // This will truncate the value to Val's input width. Simply check 841a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // for overflow by comparing. 842a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar Val = N; 843a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar return Val.getZExtValue() != N; 844a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar } 845a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 8465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val = 0; 847191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko const char *Ptr = DigitsBegin; 8485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt RadixVal(Val.getBitWidth(), radix); 8505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt CharVal(Val.getBitWidth(), 0); 8515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt OldVal = Val; 8521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool OverflowOccurred = false; 854191046d0504cec221655e9821f264f492a70f0b1Dmitri Gribenko while (Ptr < SuffixBegin) { 855728bb4c41844b1df98eb35e7fa98eb5ffa9d65a6Jordan Rose unsigned C = llvm::hexDigitValue(*Ptr++); 8561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this letter is out of bound for this radix, reject it. 8585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(C < radix && "NumericLiteralParser ctor should have rejected this"); 8591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CharVal = C; 8611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add the digit to the value in the appropriate radix. If adding in digits 8635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // made the value smaller, then this overflowed. 8645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OldVal = Val; 8655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Multiply by radix, did overflow occur on the multiply? 8675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val *= RadixVal; 8685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.udiv(RadixVal) != OldVal; 8695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add value, did overflow occur on the value? 871d70cb645702bdbb42aee58403306a7c47e0d901cDaniel Dunbar // (a + b) ult b <=> overflow 8725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val += CharVal; 8735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.ult(CharVal); 8745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return OverflowOccurred; 8765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 87894c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCallllvm::APFloat::opStatus 87994c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCallNumericLiteralParser::GetFloatValue(llvm::APFloat &Result) { 880427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek using llvm::APFloat; 8811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 882e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar unsigned n = std::min(SuffixBegin - ThisTokBegin, ThisTokEnd - ThisTokBegin); 88394c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCall return Result.convertFromString(StringRef(ThisTokBegin, n), 88494c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCall APFloat::rmNearestTiesToEven); 8855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 88858f9ce1664cd4fa67da48679a11df6aed25ce1fcJames Dennett/// \verbatim 8895cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith/// user-defined-character-literal: [C++11 lex.ext] 8905cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith/// character-literal ud-suffix 8915cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith/// ud-suffix: 8925cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith/// identifier 8935cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith/// character-literal: [C++11 lex.ccon] 8942fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// ' c-char-sequence ' 8952fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// u' c-char-sequence ' 8962fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// U' c-char-sequence ' 8972fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// L' c-char-sequence ' 8982fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// c-char-sequence: 8992fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// c-char 9002fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// c-char-sequence c-char 9012fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// c-char: 9022fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// any member of the source character set except the single-quote ', 9032fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// backslash \, or new-line character 9042fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// escape-sequence 9052fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// universal-character-name 9065cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith/// escape-sequence: 9072fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// simple-escape-sequence 9082fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// octal-escape-sequence 9092fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hexadecimal-escape-sequence 9102fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// simple-escape-sequence: 911ddddd48da72bc29d1c3f388ed91ea5549328129eNAKAMURA Takumi/// one of \' \" \? \\ \a \b \f \n \r \t \v 9122fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// octal-escape-sequence: 9132fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \ octal-digit 9142fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \ octal-digit octal-digit 9152fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \ octal-digit octal-digit octal-digit 9162fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hexadecimal-escape-sequence: 9172fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \x hexadecimal-digit 9182fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hexadecimal-escape-sequence hexadecimal-digit 9195cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith/// universal-character-name: [C++11 lex.charset] 9202fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \u hex-quad 9212fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \U hex-quad hex-quad 9222fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hex-quad: 9232fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hex-digit hex-digit hex-digit hex-digit 92458f9ce1664cd4fa67da48679a11df6aed25ce1fcJames Dennett/// \endverbatim 9252fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// 9265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCharLiteralParser::CharLiteralParser(const char *begin, const char *end, 9275cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor SourceLocation Loc, Preprocessor &PP, 9285cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor tok::TokenKind kind) { 929be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // At this point we know that the character matches the regex "(L|u|U)?'.*'". 9305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = false; 9311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9325cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Kind = kind; 9335cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 93426b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith const char *TokBegin = begin; 93526b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith 936be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // Skip over wide character determinant. 937be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (Kind != tok::char_constant) { 9385cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor ++begin; 9395cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 9401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over the entry quote. 9425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(begin[0] == '\'' && "Invalid token lexed"); 9435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++begin; 9445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9455cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith // Remove an optional ud-suffix. 9465cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith if (end[-1] != '\'') { 9475cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith const char *UDSuffixEnd = end; 9485cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith do { 9495cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith --end; 9505cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith } while (end[-1] != '\''); 9515cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith UDSuffixBuf.assign(end, UDSuffixEnd); 95226b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith UDSuffixOffset = end - TokBegin; 9535cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith } 9545cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith 955be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // Trim the ending quote. 9565cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith assert(end != begin && "Invalid token lexed"); 957be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell --end; 958be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 9591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // FIXME: The "Value" is an uint64_t so we can handle char literals of 960fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner // up to 64-bits. 9615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This extensively assumes that 'char' is 8-bits. 96298be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getCharWidth() == 8 && 9635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes char is 8 bits"); 964e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner assert(PP.getTargetInfo().getIntWidth() <= 64 && 965e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner (PP.getTargetInfo().getIntWidth() & 7) == 0 && 966e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner "Assumes sizeof(int) on target is <= 64 and a multiple of char"); 967e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner assert(PP.getTargetInfo().getWCharWidth() <= 64 && 968e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner "Assumes sizeof(wchar) on target is <= 64"); 9694bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 970be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell SmallVector<uint32_t,4> codepoint_buffer; 971be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell codepoint_buffer.resize(end-begin); 972be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell uint32_t *buffer_begin = &codepoint_buffer.front(); 973be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell uint32_t *buffer_end = buffer_begin + codepoint_buffer.size(); 974be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 975be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // Unicode escapes representing characters that cannot be correctly 976be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // represented in a single code unit are disallowed in character literals 977be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // by this implementation. 978be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell uint32_t largest_character_for_kind; 979be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (tok::wide_char_constant == Kind) { 980be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell largest_character_for_kind = 0xFFFFFFFFu >> (32-PP.getTargetInfo().getWCharWidth()); 981be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } else if (tok::utf16_char_constant == Kind) { 982be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell largest_character_for_kind = 0xFFFF; 983be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } else if (tok::utf32_char_constant == Kind) { 984be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell largest_character_for_kind = 0x10FFFF; 985be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } else { 986be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell largest_character_for_kind = 0x7Fu; 987be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 9885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 989be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell while (begin!=end) { 990be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // Is this a span of non-escape characters? 991be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (begin[0] != '\\') { 992be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell char const *start = begin; 993be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell do { 994be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell ++begin; 995be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } while (begin != end && *begin != '\\'); 996be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 99791359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman char const *tmp_in_start = start; 99891359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman uint32_t *tmp_out_start = buffer_begin; 999be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell ConversionResult res = 1000be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell ConvertUTF8toUTF32(reinterpret_cast<UTF8 const **>(&start), 1001be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell reinterpret_cast<UTF8 const *>(begin), 1002be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell &buffer_begin,buffer_end,strictConversion); 1003be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (res!=conversionOK) { 100491359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman // If we see bad encoding for unprefixed character literals, warn and 100591359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman // simply copy the byte values, for compatibility with gcc and 100691359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman // older versions of clang. 100791359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman bool NoErrorOnBadEncoding = isAscii(); 100891359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman unsigned Msg = diag::err_bad_character_encoding; 100991359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman if (NoErrorOnBadEncoding) 101091359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman Msg = diag::warn_bad_character_encoding; 101191359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman PP.Diag(Loc, Msg); 101291359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman if (NoErrorOnBadEncoding) { 101391359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman start = tmp_in_start; 101491359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman buffer_begin = tmp_out_start; 101591359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman for ( ; start != begin; ++start, ++buffer_begin) 101691359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman *buffer_begin = static_cast<uint8_t>(*start); 101791359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman } else { 101891359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman HadError = true; 101991359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman } 10205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 102191359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman for (; tmp_out_start <buffer_begin; ++tmp_out_start) { 102291359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman if (*tmp_out_start > largest_character_for_kind) { 1023be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell HadError = true; 1024be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell PP.Diag(Loc, diag::err_character_too_large); 1025be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 10261c6c64b5181a960c7d4cace4995a938d4dfa6fbfChris Lattner } 10275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1028be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 1029be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell continue; 10305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1031be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // Is this a Universal Character Name excape? 1032be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (begin[1] == 'u' || begin[1] == 'U') { 1033be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell unsigned short UcnLen = 0; 103426b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith if (!ProcessUCNEscape(TokBegin, begin, end, *buffer_begin, UcnLen, 1035be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell FullSourceLoc(Loc, PP.getSourceManager()), 10364e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie &PP.getDiagnostics(), PP.getLangOpts(), 1037be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell true)) 1038be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell { 1039be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell HadError = true; 1040be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } else if (*buffer_begin > largest_character_for_kind) { 1041be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell HadError = true; 1042e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith PP.Diag(Loc, diag::err_character_too_large); 1043be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 10441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1045be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell ++buffer_begin; 1046be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell continue; 1047be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 1048be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell unsigned CharWidth = getCharWidth(Kind, PP.getTargetInfo()); 1049be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell uint64_t result = 1050e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith ProcessCharEscape(TokBegin, begin, end, HadError, 1051e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith FullSourceLoc(Loc,PP.getSourceManager()), 1052e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith CharWidth, &PP.getDiagnostics(), PP.getLangOpts()); 1053be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell *buffer_begin++ = result; 1054e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner } 1055e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner 1056be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell unsigned NumCharsSoFar = buffer_begin-&codepoint_buffer.front(); 1057be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 1058e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (NumCharsSoFar > 1) { 1059be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (isWide()) 10605cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor PP.Diag(Loc, diag::warn_extraneous_char_constant); 1061be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell else if (isAscii() && NumCharsSoFar == 4) 1062be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell PP.Diag(Loc, diag::ext_four_char_character_literal); 1063be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell else if (isAscii()) 1064e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner PP.Diag(Loc, diag::ext_multichar_character_literal); 1065e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner else 1066be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell PP.Diag(Loc, diag::err_multichar_utf_character_literal); 10672a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman IsMultiChar = true; 1068930b71a4a7dedf70a73e5fd875bae7df452b80a9Daniel Dunbar } else 1069930b71a4a7dedf70a73e5fd875bae7df452b80a9Daniel Dunbar IsMultiChar = false; 10704bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 1071be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell llvm::APInt LitVal(PP.getTargetInfo().getIntWidth(), 0); 1072be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 1073be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // Narrow character literals act as though their value is concatenated 1074be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // in this implementation, but warn on overflow. 1075be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell bool multi_char_too_long = false; 1076be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (isAscii() && isMultiChar()) { 1077be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell LitVal = 0; 1078be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell for (size_t i=0;i<NumCharsSoFar;++i) { 1079be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // check for enough leading zeros to shift into 1080be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell multi_char_too_long |= (LitVal.countLeadingZeros() < 8); 1081be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell LitVal <<= 8; 1082be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell LitVal = LitVal + (codepoint_buffer[i] & 0xFF); 1083be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 1084be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } else if (NumCharsSoFar > 0) { 1085be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell // otherwise just take the last character 1086be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell LitVal = buffer_begin[-1]; 1087be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 1088be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 1089be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell if (!HadError && multi_char_too_long) { 1090be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell PP.Diag(Loc,diag::warn_char_constant_too_large); 1091be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell } 1092be773526230b5a7121a8b321b05f2e53fa473f5cSeth Cantrell 10934bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // Transfer the value from APInt to uint64_t 10944bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta Value = LitVal.getZExtValue(); 10951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a single narrow character, sign extend it (e.g. '\xFF' is "-1") 10975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if 'char' is signed for this target (C99 6.4.4.4p10). Note that multiple 10985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // character constants are not sign extended in the this implementation: 10995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // '\xFF\xFF' = 65536 and '\x0\xFF' = 255, which matches GCC. 11005cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (isAscii() && NumCharsSoFar == 1 && (Value & 128) && 11014e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie PP.getLangOpts().CharIsSigned) 11025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = (signed char)Value; 11035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 11045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1105a1263cfb87151771fd74a1d2b676ae2ba172b72cJames Dennett/// \verbatim 11062fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// string-literal: [C++0x lex.string] 11072fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// encoding-prefix " [s-char-sequence] " 11082fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// encoding-prefix R raw-string 11092fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// encoding-prefix: 11102fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// u8 11112fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// u 11122fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// U 11132fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// L 11145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence: 11155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char 11165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence s-char 11175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char: 11182fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// any member of the source character set except the double-quote ", 11192fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// backslash \, or new-line character 11202fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// escape-sequence 11215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 11222fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// raw-string: 11232fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// " d-char-sequence ( r-char-sequence ) d-char-sequence " 11242fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// r-char-sequence: 11252fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// r-char 11262fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// r-char-sequence r-char 11272fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// r-char: 11282fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// any member of the source character set, except a right parenthesis ) 11292fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// followed by the initial d-char-sequence (which may be empty) 11302fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// followed by a double quote ". 11312fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// d-char-sequence: 11322fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// d-char 11332fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// d-char-sequence d-char 11342fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// d-char: 11352fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// any member of the basic source character set except: 11362fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// space, the left parenthesis (, the right parenthesis ), 11372fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// the backslash \, and the control characters representing horizontal 11382fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// tab, vertical tab, form feed, and newline. 11392fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// escape-sequence: [C++0x lex.ccon] 11402fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// simple-escape-sequence 11412fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// octal-escape-sequence 11422fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hexadecimal-escape-sequence 11432fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// simple-escape-sequence: 1144ddddd48da72bc29d1c3f388ed91ea5549328129eNAKAMURA Takumi/// one of \' \" \? \\ \a \b \f \n \r \t \v 11452fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// octal-escape-sequence: 11462fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \ octal-digit 11472fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \ octal-digit octal-digit 11482fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \ octal-digit octal-digit octal-digit 11492fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hexadecimal-escape-sequence: 11502fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// \x hexadecimal-digit 11512fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// hexadecimal-escape-sequence hexadecimal-digit 11525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name: 11535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \u hex-quad 11545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \U hex-quad hex-quad 11555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-quad: 11565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-digit hex-digit hex-digit hex-digit 1157a1263cfb87151771fd74a1d2b676ae2ba172b72cJames Dennett/// \endverbatim 11585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 11595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteralParser:: 1160d217773f106856a11879ec79dc468efefaf2ee75Chris LattnerStringLiteralParser(const Token *StringToks, unsigned NumStringToks, 11610833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner Preprocessor &PP, bool Complain) 11624e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie : SM(PP.getSourceManager()), Features(PP.getLangOpts()), 1163403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis Target(PP.getTargetInfo()), Diags(Complain ? &PP.getDiagnostics() : 0), 11645cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor MaxTokenLength(0), SizeBound(0), CharByteWidth(0), Kind(tok::unknown), 11655cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor ResultPtr(ResultBuf.data()), hadError(false), Pascal(false) { 11660833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner init(StringToks, NumStringToks); 11670833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner} 11680833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner 11690833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattnervoid StringLiteralParser::init(const Token *StringToks, unsigned NumStringToks){ 1170403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis // The literal token may have come from an invalid source location (e.g. due 1171403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis // to a PCH error), in which case the token length will be 0. 11723144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis if (NumStringToks == 0 || StringToks[0].getLength() < 2) 11733144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis return DiagnoseLexingError(SourceLocation()); 1174403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis 11755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan all of the string portions, remember the max individual token length, 11765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // computing a bound on the concatenated string length, and see whether any 11775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // piece is a wide-string. If any of the string portions is a wide-string 11785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // literal, the result is a wide-string literal [C99 6.4.5p4]. 1179403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis assert(NumStringToks && "expected at least one token"); 11806cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt MaxTokenLength = StringToks[0].getLength(); 1181403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis assert(StringToks[0].getLength() >= 2 && "literal token is invalid!"); 11826cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt SizeBound = StringToks[0].getLength()-2; // -2 for "". 11835cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Kind = StringToks[0].getKind(); 11846cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt 11856cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt hadError = false; 11865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 11875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Implement Translation Phase #6: concatenation of string literals 11885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// (C99 5.1.1.2p1). The common case is only one string fragment. 11895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1; i != NumStringToks; ++i) { 11903144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis if (StringToks[i].getLength() < 2) 11913144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis return DiagnoseLexingError(StringToks[i].getLocation()); 1192403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis 11935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The string could be shorter than this if it needs cleaning, but this is a 11945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reasonable bound, which is all we need. 1195403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis assert(StringToks[i].getLength() >= 2 && "literal token is invalid!"); 11966cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt SizeBound += StringToks[i].getLength()-2; // -2 for "". 11971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember maximum string piece length. 11996cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt if (StringToks[i].getLength() > MaxTokenLength) 12006cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt MaxTokenLength = StringToks[i].getLength(); 12011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12025cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Remember if we see any wide or utf-8/16/32 strings. 12035cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Also check for illegal concatenations. 12045cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (StringToks[i].isNot(Kind) && StringToks[i].isNot(tok::string_literal)) { 12055cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (isAscii()) { 12065cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Kind = StringToks[i].getKind(); 12075cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } else { 12085cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (Diags) 1209e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diags->Report(StringToks[i].getLocation(), 12105cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor diag::err_unsupported_string_concat); 12115cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor hadError = true; 12125cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 12135cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 12145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1215dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 12165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Include space for the null terminator. 12175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++SizeBound; 12181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R warning: "traditional C rejects string constant concatenation" 12201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12215cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Get the width in bytes of char/wchar_t/char16_t/char32_t 12225cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharByteWidth = getCharWidth(Kind, Target); 12235cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple"); 12245cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharByteWidth /= 8; 12251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The output buffer size needs to be large enough to hold wide characters. 12275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This is a worst-case assumption which basically corresponds to L"" "long". 12285cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor SizeBound *= CharByteWidth; 12291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Size the temporary buffer to hold the result string data. 12315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultBuf.resize(SizeBound); 12321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Likewise, but for each string piece. 1234f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<512> TokenBuf; 12355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TokenBuf.resize(MaxTokenLength); 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Loop over all the strings, getting their spelling, and expanding them to 12385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // wide strings as appropriate. 12395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr = &ResultBuf[0]; // Next byte to fill in. 12401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1241ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = false; 12421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12435cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith SourceLocation UDSuffixTokLoc; 12445cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith 12455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = NumStringToks; i != e; ++i) { 12465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokBuf = &TokenBuf[0]; 12475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the spelling of the token, which eliminates trigraphs, etc. We know 12485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that ThisTokBuf points to a buffer that is big enough for the whole token 12495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and 'spelled' tokens can only shrink. 125050f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor bool StringInvalid = false; 12510833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner unsigned ThisTokLen = 1252b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner Lexer::getSpelling(StringToks[i], ThisTokBuf, SM, Features, 1253b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner &StringInvalid); 12543144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis if (StringInvalid) 12553144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis return DiagnoseLexingError(StringToks[i].getLocation()); 125650f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor 125726b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith const char *ThisTokBegin = ThisTokBuf; 12585cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith const char *ThisTokEnd = ThisTokBuf+ThisTokLen; 12595cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith 12605cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith // Remove an optional ud-suffix. 12615cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith if (ThisTokEnd[-1] != '"') { 12625cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith const char *UDSuffixEnd = ThisTokEnd; 12635cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith do { 12645cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith --ThisTokEnd; 12655cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith } while (ThisTokEnd[-1] != '"'); 12665cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith 12675cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith StringRef UDSuffix(ThisTokEnd, UDSuffixEnd - ThisTokEnd); 12685cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith 12695cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith if (UDSuffixBuf.empty()) { 12705cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith UDSuffixBuf.assign(UDSuffix); 1271dd66be718f23c8149d74ae8b011b002e11e8d5baRichard Smith UDSuffixToken = i; 1272dd66be718f23c8149d74ae8b011b002e11e8d5baRichard Smith UDSuffixOffset = ThisTokEnd - ThisTokBuf; 12735cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith UDSuffixTokLoc = StringToks[i].getLocation(); 12745cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith } else if (!UDSuffixBuf.equals(UDSuffix)) { 12755cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith // C++11 [lex.ext]p8: At the end of phase 6, if a string literal is the 12765cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith // result of a concatenation involving at least one user-defined-string- 12775cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith // literal, all the participating user-defined-string-literals shall 12785cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith // have the same ud-suffix. 12795cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith if (Diags) { 12805cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith SourceLocation TokLoc = StringToks[i].getLocation(); 12815cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith Diags->Report(TokLoc, diag::err_string_concat_mixed_suffix) 12825cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith << UDSuffixBuf << UDSuffix 12835cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith << SourceRange(UDSuffixTokLoc, UDSuffixTokLoc) 12845cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith << SourceRange(TokLoc, TokLoc); 12855cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith } 12865cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith hadError = true; 12875cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith } 12885cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith } 12895cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith 12905cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith // Strip the end quote. 12915cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith --ThisTokEnd; 12925cc2c6eb67b6e5361bbe96f79b519fd62ec666d6Richard Smith 12935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Input character set mapping support. 12941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12951661d717563d6a27dec3da69deba2b2efaa45802Craig Topper // Skip marker for wide or unicode strings. 12965cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (ThisTokBuf[0] == 'L' || ThisTokBuf[0] == 'u' || ThisTokBuf[0] == 'U') { 12975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 12985cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Skip 8 of u8 marker for utf8 strings. 12995cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (ThisTokBuf[0] == '8') 13005cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor ++ThisTokBuf; 130156bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian } 13021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13032fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Check for raw string 13042fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper if (ThisTokBuf[0] == 'R') { 13052fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper ThisTokBuf += 2; // skip R" 13061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13072fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper const char *Prefix = ThisTokBuf; 13082fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper while (ThisTokBuf[0] != '(') 1309ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ++ThisTokBuf; 13102fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper ++ThisTokBuf; // skip '(' 13112fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper 131249d517467c3dcd2c67e8a6c740ba5160e37625f7Richard Smith // Remove same number of characters from the end 131349d517467c3dcd2c67e8a6c740ba5160e37625f7Richard Smith ThisTokEnd -= ThisTokBuf - Prefix; 131449d517467c3dcd2c67e8a6c740ba5160e37625f7Richard Smith assert(ThisTokEnd >= ThisTokBuf && "malformed raw string literal"); 13152fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper 13162fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Copy the string over 1317e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (CopyStringFragment(StringToks[i], ThisTokBegin, 1318e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith StringRef(ThisTokBuf, ThisTokEnd - ThisTokBuf))) 1319e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith hadError = true; 13202fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper } else { 132107a075870110a8376ddc1cd09412a0ec00987153Argyrios Kyrtzidis if (ThisTokBuf[0] != '"') { 132207a075870110a8376ddc1cd09412a0ec00987153Argyrios Kyrtzidis // The file may have come from PCH and then changed after loading the 132307a075870110a8376ddc1cd09412a0ec00987153Argyrios Kyrtzidis // PCH; Fail gracefully. 13243144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis return DiagnoseLexingError(StringToks[i].getLocation()); 132507a075870110a8376ddc1cd09412a0ec00987153Argyrios Kyrtzidis } 13262fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper ++ThisTokBuf; // skip " 13272fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper 13282fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Check if this is a pascal string 13292fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper if (Features.PascalStrings && ThisTokBuf + 1 != ThisTokEnd && 13302fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper ThisTokBuf[0] == '\\' && ThisTokBuf[1] == 'p') { 13311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13322fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // If the \p sequence is found in the first token, we have a pascal string 13332fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Otherwise, if we already have a pascal string, ignore the first \p 13342fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper if (i == 0) { 13355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 13362fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper Pascal = true; 13372fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper } else if (Pascal) 13382fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper ThisTokBuf += 2; 13395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 13401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13412fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper while (ThisTokBuf != ThisTokEnd) { 13422fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Is this a span of non-escape characters? 13432fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper if (ThisTokBuf[0] != '\\') { 13442fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper const char *InStart = ThisTokBuf; 13452fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper do { 13462fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper ++ThisTokBuf; 13472fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper } while (ThisTokBuf != ThisTokEnd && ThisTokBuf[0] != '\\'); 13482fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper 13492fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Copy the character span over. 1350e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (CopyStringFragment(StringToks[i], ThisTokBegin, 1351e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith StringRef(InStart, ThisTokBuf - InStart))) 1352e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith hadError = true; 13532fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper continue; 13542fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper } 13552fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Is this a Universal Character Name escape? 13562fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper if (ThisTokBuf[1] == 'u' || ThisTokBuf[1] == 'U') { 135726b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith EncodeUCNEscape(ThisTokBegin, ThisTokBuf, ThisTokEnd, 135826b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith ResultPtr, hadError, 135926b75c07317a3b50a8a00a1623e3ef38af1d8349Richard Smith FullSourceLoc(StringToks[i].getLocation(), SM), 13602fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper CharByteWidth, Diags, Features); 13612fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper continue; 13622fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper } 13632fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper // Otherwise, this is a non-UCN escape character. Process it. 13642fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper unsigned ResultChar = 1365e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith ProcessCharEscape(ThisTokBegin, ThisTokBuf, ThisTokEnd, hadError, 13662fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper FullSourceLoc(StringToks[i].getLocation(), SM), 1367e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith CharByteWidth*8, Diags, Features); 13682fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper 1369caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman if (CharByteWidth == 4) { 1370caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // FIXME: Make the type of the result buffer correct instead of 1371caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // using reinterpret_cast. 1372caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman UTF32 *ResultWidePtr = reinterpret_cast<UTF32*>(ResultPtr); 13739b483df983759d51d61d54e8ae34bff423d15403Nico Weber *ResultWidePtr = ResultChar; 1374caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman ResultPtr += 4; 1375caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman } else if (CharByteWidth == 2) { 1376caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // FIXME: Make the type of the result buffer correct instead of 1377caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman // using reinterpret_cast. 1378caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman UTF16 *ResultWidePtr = reinterpret_cast<UTF16*>(ResultPtr); 13799b483df983759d51d61d54e8ae34bff423d15403Nico Weber *ResultWidePtr = ResultChar & 0xFFFF; 1380caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman ResultPtr += 2; 1381caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman } else { 1382caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman assert(CharByteWidth == 1 && "Unexpected char width"); 1383caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman *ResultPtr++ = ResultChar & 0xFF; 1384caf1f26777c3adf2556c3af7bf9e01bd8ead17d9Eli Friedman } 13852fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper } 13865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 13875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 13881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1389bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner if (Pascal) { 139022508f410b3d727d5c557af3304c0a1bad94999eEli Friedman if (CharByteWidth == 4) { 139122508f410b3d727d5c557af3304c0a1bad94999eEli Friedman // FIXME: Make the type of the result buffer correct instead of 139222508f410b3d727d5c557af3304c0a1bad94999eEli Friedman // using reinterpret_cast. 139322508f410b3d727d5c557af3304c0a1bad94999eEli Friedman UTF32 *ResultWidePtr = reinterpret_cast<UTF32*>(ResultBuf.data()); 139422508f410b3d727d5c557af3304c0a1bad94999eEli Friedman ResultWidePtr[0] = GetNumStringChars() - 1; 139522508f410b3d727d5c557af3304c0a1bad94999eEli Friedman } else if (CharByteWidth == 2) { 139622508f410b3d727d5c557af3304c0a1bad94999eEli Friedman // FIXME: Make the type of the result buffer correct instead of 139722508f410b3d727d5c557af3304c0a1bad94999eEli Friedman // using reinterpret_cast. 139822508f410b3d727d5c557af3304c0a1bad94999eEli Friedman UTF16 *ResultWidePtr = reinterpret_cast<UTF16*>(ResultBuf.data()); 139922508f410b3d727d5c557af3304c0a1bad94999eEli Friedman ResultWidePtr[0] = GetNumStringChars() - 1; 140022508f410b3d727d5c557af3304c0a1bad94999eEli Friedman } else { 140122508f410b3d727d5c557af3304c0a1bad94999eEli Friedman assert(CharByteWidth == 1 && "Unexpected char width"); 140222508f410b3d727d5c557af3304c0a1bad94999eEli Friedman ResultBuf[0] = GetNumStringChars() - 1; 140322508f410b3d727d5c557af3304c0a1bad94999eEli Friedman } 1404bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner 1405bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner // Verify that pascal strings aren't too large. 14060833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner if (GetStringLength() > 256) { 1407e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (Diags) 1408e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diags->Report(StringToks[0].getLocation(), 14090833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner diag::err_pascal_string_too_long) 14100833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner << SourceRange(StringToks[0].getLocation(), 14110833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner StringToks[NumStringToks-1].getLocation()); 14125cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor hadError = true; 141357d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman return; 141457d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman } 14150833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner } else if (Diags) { 1416427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor // Complain if this string literal has too many characters. 1417a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner unsigned MaxChars = Features.CPlusPlus? 65536 : Features.C99 ? 4095 : 509; 14185d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer 1419427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor if (GetNumStringChars() > MaxChars) 1420e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith Diags->Report(StringToks[0].getLocation(), 14210833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner diag::ext_string_too_long) 1422427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor << GetNumStringChars() << MaxChars 1423a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner << (Features.CPlusPlus ? 2 : Features.C99 ? 1 : 0) 1424427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor << SourceRange(StringToks[0].getLocation(), 1425427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor StringToks[NumStringToks-1].getLocation()); 1426bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner } 14275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1428719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 14295d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramerstatic const char *resyncUTF8(const char *Err, const char *End) { 14305d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer if (Err == End) 14315d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer return End; 14325d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer End = Err + std::min<unsigned>(getNumBytesForUTF8(*Err), End-Err); 14335d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer while (++Err != End && (*Err & 0xC0) == 0x80) 14345d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer ; 14355d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer return Err; 14365bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell} 14375bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell 1438e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith/// \brief This function copies from Fragment, which is a sequence of bytes 1439e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith/// within Tok's contents (which begin at TokBegin) into ResultPtr. 14402fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper/// Performs widening for multi-byte characters. 1441e5f0588840b20897631cc8110344fd2745ef4caaRichard Smithbool StringLiteralParser::CopyStringFragment(const Token &Tok, 1442e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const char *TokBegin, 1443e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith StringRef Fragment) { 1444e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith const UTF8 *ErrorPtrTmp; 1445e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (ConvertUTF8toWide(CharByteWidth, Fragment, ResultPtr, ErrorPtrTmp)) 1446e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith return false; 14472fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper 144891359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman // If we see bad encoding for unprefixed string literals, warn and 144991359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman // simply copy the byte values, for compatibility with gcc and older 145091359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman // versions of clang. 145191359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman bool NoErrorOnBadEncoding = isAscii(); 1452e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (NoErrorOnBadEncoding) { 1453e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith memcpy(ResultPtr, Fragment.data(), Fragment.size()); 1454e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith ResultPtr += Fragment.size(); 1455e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith } 14565bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell 1457e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith if (Diags) { 14585bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell const char *ErrorPtr = reinterpret_cast<const char *>(ErrorPtrTmp); 14595bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell 14605bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell FullSourceLoc SourceLoc(Tok.getLocation(), SM); 14615bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell const DiagnosticBuilder &Builder = 14625bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell Diag(Diags, Features, SourceLoc, TokBegin, 14635d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer ErrorPtr, resyncUTF8(ErrorPtr, Fragment.end()), 14645bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell NoErrorOnBadEncoding ? diag::warn_bad_string_encoding 14655bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell : diag::err_bad_string_encoding); 14665bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell 14675d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer const char *NextStart = resyncUTF8(ErrorPtr, Fragment.end()); 14685bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell StringRef NextFragment(NextStart, Fragment.end()-NextStart); 14695bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell 14704f056ac7f8d837822dbf8ab7cdd6849a9b0ad12fBenjamin Kramer // Decode into a dummy buffer. 14714f056ac7f8d837822dbf8ab7cdd6849a9b0ad12fBenjamin Kramer SmallString<512> Dummy; 14724f056ac7f8d837822dbf8ab7cdd6849a9b0ad12fBenjamin Kramer Dummy.reserve(Fragment.size() * CharByteWidth); 14734f056ac7f8d837822dbf8ab7cdd6849a9b0ad12fBenjamin Kramer char *Ptr = Dummy.data(); 14744f056ac7f8d837822dbf8ab7cdd6849a9b0ad12fBenjamin Kramer 147582c6dc72adc30e785ce5bc6e8b43ae92070d2e08David Blaikie while (!Builder.hasMaxRanges() && 14764f056ac7f8d837822dbf8ab7cdd6849a9b0ad12fBenjamin Kramer !ConvertUTF8toWide(CharByteWidth, NextFragment, Ptr, ErrorPtrTmp)) { 14775bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell const char *ErrorPtr = reinterpret_cast<const char *>(ErrorPtrTmp); 14785d704fef6e0a7db07329a37290684b17bf6badf8Benjamin Kramer NextStart = resyncUTF8(ErrorPtr, Fragment.end()); 14795bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell Builder << MakeCharSourceRange(Features, SourceLoc, TokBegin, 14805bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell ErrorPtr, NextStart); 14815bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell NextFragment = StringRef(NextStart, Fragment.end()-NextStart); 14825bffbe5c1033967fe49c7a638fdcea99d30d573aSeth Cantrell } 1483e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith } 148491359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman return !NoErrorOnBadEncoding; 148591359302b822d829afa93c0dadf5f7ce6e19fbc6Eli Friedman} 14862fa4e86b4fdada3b9ecbbbd99965b83ed879f69bCraig Topper 14873144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidisvoid StringLiteralParser::DiagnoseLexingError(SourceLocation Loc) { 14883144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis hadError = true; 14893144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis if (Diags) 14903144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis Diags->Report(Loc, diag::err_lexing_string); 14913144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis} 14923144749f8bf9bbf7c027f2161a930bff80ad6f72Argyrios Kyrtzidis 1493719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// getOffsetOfStringByte - This function returns the offset of the 1494719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// specified byte of the string data represented by Token. This handles 1495719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// advancing over escape sequences in the string. 1496719e61573f27c11057ecfe0dd8f141621602c571Chris Lattnerunsigned StringLiteralParser::getOffsetOfStringByte(const Token &Tok, 14976c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner unsigned ByteNo) const { 1498719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Get the spelling of the token. 1499f7ccbad5d9949e7ddd1cbef43d482553b811e026Dylan Noblesmith SmallString<32> SpellingBuffer; 15006cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt SpellingBuffer.resize(Tok.getLength()); 15011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 150250f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor bool StringInvalid = false; 1503719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingPtr = &SpellingBuffer[0]; 1504b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner unsigned TokLen = Lexer::getSpelling(Tok, SpellingPtr, SM, Features, 1505b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner &StringInvalid); 150691f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (StringInvalid) 150750f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor return 0; 1508719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 1509df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith const char *SpellingStart = SpellingPtr; 1510df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith const char *SpellingEnd = SpellingPtr+TokLen; 1511df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 1512df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // Handle UTF-8 strings just like narrow strings. 1513df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (SpellingPtr[0] == 'u' && SpellingPtr[1] == '8') 1514df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith SpellingPtr += 2; 1515df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 15165cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(SpellingPtr[0] != 'L' && SpellingPtr[0] != 'u' && 15175cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor SpellingPtr[0] != 'U' && "Doesn't handle wide or utf strings yet"); 1518719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 1519df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // For raw string literals, this is easy. 1520df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (SpellingPtr[0] == 'R') { 1521df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith assert(SpellingPtr[1] == '"' && "Should be a raw string literal!"); 1522df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // Skip 'R"'. 1523df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith SpellingPtr += 2; 1524df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith while (*SpellingPtr != '(') { 1525df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith ++SpellingPtr; 1526df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith assert(SpellingPtr < SpellingEnd && "Missing ( for raw string literal"); 1527df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith } 1528df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // Skip '('. 1529df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith ++SpellingPtr; 1530df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith return SpellingPtr - SpellingStart + ByteNo; 1531df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith } 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1533df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // Skip over the leading quote 1534719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr[0] == '"' && "Should be a string literal!"); 1535719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 15361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1537719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Skip over bytes until we find the offset we're looking for. 1538719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner while (ByteNo) { 1539719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr < SpellingEnd && "Didn't find byte offset!"); 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1541719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Step over non-escapes simply. 1542719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner if (*SpellingPtr != '\\') { 1543719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 1544719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner --ByteNo; 1545719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner continue; 1546719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 15471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1548719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Otherwise, this is an escape character. Advance over it. 1549719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner bool HadError = false; 1550df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (SpellingPtr[1] == 'u' || SpellingPtr[1] == 'U') { 1551df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith const char *EscapePtr = SpellingPtr; 1552df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith unsigned Len = MeasureUCNEscape(SpellingStart, SpellingPtr, SpellingEnd, 1553df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith 1, Features, HadError); 1554df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith if (Len > ByteNo) { 1555df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith // ByteNo is somewhere within the escape sequence. 1556df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith SpellingPtr = EscapePtr; 1557df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith break; 1558df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith } 1559df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith ByteNo -= Len; 1560df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith } else { 1561e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith ProcessCharEscape(SpellingStart, SpellingPtr, SpellingEnd, HadError, 1562df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith FullSourceLoc(Tok.getLocation(), SM), 1563e5f0588840b20897631cc8110344fd2745ef4caaRichard Smith CharByteWidth*8, Diags, Features); 1564df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith --ByteNo; 1565df9ef1bc8c3780307ab2ed81bf5e31c23310b936Richard Smith } 1566719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(!HadError && "This method isn't valid on erroneous strings"); 1567719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 15681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1569719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner return SpellingPtr-SpellingStart; 1570719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner} 1571