LiteralSupport.cpp revision 1661d717563d6a27dec3da69deba2b2efaa45802
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" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Preprocessor.h" 17500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.h" 18136f93a2b660fc780fc2dba82a6f42ca4dc9164aChris Lattner#include "clang/Basic/TargetInfo.h" 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/ADT/StringExtras.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HexDigitValue - Return the value of the specified hex digit, or -1 if it's 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// not valid. 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstatic int HexDigitValue(char C) { 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= '0' && C <= '9') return C-'0'; 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= 'a' && C <= 'f') return C-'a'+10; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= 'A' && C <= 'F') return C-'A'+10; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return -1; 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 315cee1195584fa8672253139c86e922daeda69b9eDouglas Gregorstatic unsigned getCharWidth(tok::TokenKind kind, const TargetInfo &Target) { 325cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor switch (kind) { 335cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor default: assert(0 && "Unknown token type!"); 345cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::char_constant: 355cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::string_literal: 365cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf8_string_literal: 375cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getCharWidth(); 385cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::wide_char_constant: 395cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::wide_string_literal: 405cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getWCharWidth(); 415cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf16_char_constant: 425cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf16_string_literal: 435cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getChar16Width(); 445cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf32_char_constant: 455cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor case tok::utf32_string_literal: 465cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return Target.getChar32Width(); 475cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 485cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor} 495cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ProcessCharEscape - Parse a standard C escape sequence, which can occur in 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// either a character or a string literal. 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstatic unsigned ProcessCharEscape(const char *&ThisTokBuf, 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd, bool &HadError, 545cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor FullSourceLoc Loc, unsigned CharWidth, 555cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Diagnostic *Diags) { 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip the '\' char. 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that this character can't be off the end of the buffer, because 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that would have been \", which would not have been the end of string. 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar = *ThisTokBuf++; 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (ResultChar) { 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These map to themselves. 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '\\': case '\'': case '"': case '?': break; 651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These have fixed mappings. 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'a': 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R: the meaning of '\\a' is different in traditional C 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 7; 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'b': 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 8; 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'e': 7591f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 7691f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::ext_nonstandard_escape) << "e"; 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 27; 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 793c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman case 'E': 8091f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 8191f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::ext_nonstandard_escape) << "E"; 823c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman ResultChar = 27; 833c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman break; 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'f': 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 12; 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'n': 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 10; 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'r': 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 13; 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 't': 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 9; 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'v': 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 11; 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'x': { // Hex escape. 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 10291f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 10391f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::err_hex_escape_no_digits); 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = 1; 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Hex escapes are a maximal series of hex digits. 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Overflow = false; 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; ThisTokBuf != ThisTokEnd; ++ThisTokBuf) { 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer int CharVal = HexDigitValue(ThisTokBuf[0]); 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharVal == -1) break; 113c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // About to shift out a digit? 114c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner Overflow |= (ResultChar & 0xF0000000) ? true : false; 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 4; 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= CharVal; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See if any bits will be truncated when evaluated as a character. 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Overflow = true; 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. 12691f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Overflow && Diags) // Too many digits to fit in 12791f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::warn_hex_escape_too_large); 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '0': case '1': case '2': case '3': 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '4': case '5': case '6': case '7': { 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes. 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --ThisTokBuf; 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes are a series of octal digits with maximum length 3. 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // "\0123" is a two digit sequence equal to "\012" "3". 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumDigits = 0; 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 3; 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= *ThisTokBuf++ - '0'; 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumDigits; 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && NumDigits < 3 && 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisTokBuf[0] >= '0' && ThisTokBuf[0] <= '7'); 1451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. Reject '\777', but not L'\777'. 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 14891f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 14991f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::warn_octal_escape_too_large); 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, these are not valid escapes. 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '(': case '{': case '[': case '%': 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // GCC accepts these as extensions. We warn about them as such though. 15891f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags) 15991f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::ext_nonstandard_escape) 160b90f4b3fb94056609da9cca5eef7358d95a363b2Douglas Gregor << std::string()+(char)ResultChar; 161f01fdff97b245caac98100d232c760b4d0531411Eli Friedman break; 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 16391f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (Diags == 0) 164b90f4b3fb94056609da9cca5eef7358d95a363b2Douglas Gregor break; 165b90f4b3fb94056609da9cca5eef7358d95a363b2Douglas Gregor 16623ef69d197ba3b5e9602f7161fee50990059502aTed Kremenek if (isgraph(ResultChar)) 16791f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::ext_unknown_escape) 16891f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner << std::string()+(char)ResultChar; 169ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner else 17091f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner Diags->Report(Loc, diag::ext_unknown_escape) 17191f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner << "x"+llvm::utohexstr(ResultChar); 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ResultChar; 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1780e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// ProcessUCNEscape - Read the Universal Character Name, check constraints and 17959705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// return the UTF32. 18059705aee3fe01aa6fb6962dd11350161b47983d9Nico Weberstatic bool ProcessUCNEscape(const char *&ThisTokBuf, const char *ThisTokEnd, 18159705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber uint32_t &UcnVal, unsigned short &UcnLen, 182872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner FullSourceLoc Loc, Diagnostic *Diags, 1836c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner const LangOptions &Features) { 1846c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner if (!Features.CPlusPlus && !Features.C99 && Diags) 185872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner Diags->Report(Loc, diag::warn_ucn_not_valid_in_c89); 1861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1874e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Save the beginning of the string (for error diagnostics). 1884e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff const char *ThisTokBegin = ThisTokBuf; 1891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1900e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Skip the '\u' char's. 1910e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ThisTokBuf += 2; 1920e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 1930e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 1946c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner if (Diags) 195872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner Diags->Report(Loc, diag::err_ucn_escape_no_digits); 19659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber return false; 1970e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 19859705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber UcnLen = (ThisTokBuf[-1] == 'u' ? 4 : 8); 19956bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian unsigned short UcnLenSave = UcnLen; 20059705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber for (; ThisTokBuf != ThisTokEnd && UcnLenSave; ++ThisTokBuf, UcnLenSave--) { 2010e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff int CharVal = HexDigitValue(ThisTokBuf[0]); 2020e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (CharVal == -1) break; 2030e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal <<= 4; 2040e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal |= CharVal; 2050e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 2060e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // If we didn't consume the proper number of digits, there is a problem. 20759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber if (UcnLenSave) { 208872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner if (Diags) { 2097ef5c27eb6e8ebe58b52013246c06753c3613263Chris Lattner SourceLocation L = 2107ef5c27eb6e8ebe58b52013246c06753c3613263Chris Lattner Lexer::AdvanceToTokenCharacter(Loc, ThisTokBuf-ThisTokBegin, 2117ef5c27eb6e8ebe58b52013246c06753c3613263Chris Lattner Loc.getManager(), Features); 2127ef5c27eb6e8ebe58b52013246c06753c3613263Chris Lattner Diags->Report(FullSourceLoc(L, Loc.getManager()), 2137ef5c27eb6e8ebe58b52013246c06753c3613263Chris Lattner diag::err_ucn_escape_incomplete); 214872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner } 21559705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber return false; 2160e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 2171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Check UCN constraints (C99 6.4.3p2). 2180e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if ((UcnVal < 0xa0 && 2190e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff (UcnVal != 0x24 && UcnVal != 0x40 && UcnVal != 0x60 )) // $, @, ` 2201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump || (UcnVal >= 0xD800 && UcnVal <= 0xDFFF) 2218a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff || (UcnVal > 0x10FFFF)) /* the maximum legal UTF32 value */ { 2226c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner if (Diags) 223872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner Diags->Report(Loc, diag::err_ucn_escape_invalid); 22459705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber return false; 22559705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber } 22659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber return true; 22759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber} 22859705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber 22959705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// EncodeUCNEscape - Read the Universal Character Name, check constraints and 23059705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// convert the UTF32 to UTF8 or UTF16. This is a subroutine of 23159705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// StringLiteralParser. When we decide to implement UCN's for identifiers, 23259705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber/// we will likely rework our support for UCN's. 23359705aee3fe01aa6fb6962dd11350161b47983d9Nico Weberstatic void EncodeUCNEscape(const char *&ThisTokBuf, const char *ThisTokEnd, 234a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner char *&ResultBuf, bool &HadError, 2355cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor FullSourceLoc Loc, unsigned CharByteWidth, 2365cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Diagnostic *Diags, const LangOptions &Features) { 23759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber typedef uint32_t UTF32; 23859705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber UTF32 UcnVal = 0; 23959705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber unsigned short UcnLen = 0; 240a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner if (!ProcessUCNEscape(ThisTokBuf, ThisTokEnd, UcnVal, UcnLen, Loc, Diags, 241a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner Features)) { 2420e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff HadError = 1; 2430e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 2440e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 24559705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber 2465cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth) && 2475cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor "only character widths of 1, 2, or 4 bytes supported"); 248a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber 2495cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor (void)UcnLen; 2505cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert((UcnLen== 4 || UcnLen== 8) && "only ucn length of 4 or 8 supported"); 2515cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 2525cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (CharByteWidth == 4) { 2535cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Note: our internal rep of wide char tokens is always little-endian. 2545cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor *ResultBuf++ = (UcnVal & 0x000000FF); 2555cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor *ResultBuf++ = (UcnVal & 0x0000FF00) >> 8; 2565cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor *ResultBuf++ = (UcnVal & 0x00FF0000) >> 16; 2575cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor *ResultBuf++ = (UcnVal & 0xFF000000) >> 24; 2585cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor return; 2595cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 260a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber 2615cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (CharByteWidth == 2) { 262a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber // Convert to UTF16. 263a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber if (UcnVal < (UTF32)0xFFFF) { 264a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber *ResultBuf++ = (UcnVal & 0x000000FF); 265a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber *ResultBuf++ = (UcnVal & 0x0000FF00) >> 8; 266a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber return; 267a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber } 268a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner if (Diags) Diags->Report(Loc, diag::warn_ucn_escape_too_large); 269a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber 270a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber typedef uint16_t UTF16; 271a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber UcnVal -= 0x10000; 272a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber UTF16 surrogate1 = 0xD800 + (UcnVal >> 10); 273a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber UTF16 surrogate2 = 0xDC00 + (UcnVal & 0x3FF); 274a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber *ResultBuf++ = (surrogate1 & 0x000000FF); 275a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber *ResultBuf++ = (surrogate1 & 0x0000FF00) >> 8; 276a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber *ResultBuf++ = (surrogate2 & 0x000000FF); 277a0f15b0848405ae16d63bd5d78c862a6526b338aNico Weber *ResultBuf++ = (surrogate2 & 0x0000FF00) >> 8; 27856bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian return; 27956bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian } 2805cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 2815cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(CharByteWidth == 1 && "UTF-8 encoding is only for 1 byte characters"); 2825cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 2830e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Now that we've parsed/checked the UCN, we convert from UTF32->UTF8. 2840e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // The conversion below was inspired by: 2850e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.c 2861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // First, we determine how many bytes the result will require. 2874e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff typedef uint8_t UTF8; 2880e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 2890e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff unsigned short bytesToWrite = 0; 2900e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (UcnVal < (UTF32)0x80) 2910e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 1; 2920e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x800) 2930e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 2; 2940e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x10000) 2950e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 3; 2960e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else 2970e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 4; 2981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2990e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMask = 0xBF; 3000e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMark = 0x80; 3011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3020e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Once the bits are split out into bytes of UTF8, this is a mask OR-ed 3038a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff // into the first byte, depending on how many bytes follow. 3041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump static const UTF8 firstByteMark[5] = { 3058a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff 0x00, 0x00, 0xC0, 0xE0, 0xF0 3060e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff }; 3070e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Finally, we write the bytes into ResultBuf. 3080e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 3090e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff switch (bytesToWrite) { // note: everything falls through. 3100e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 4: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 3110e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 3: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 3120e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 2: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 3130e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 1: *--ResultBuf = (UTF8) (UcnVal | firstByteMark[bytesToWrite]); 3140e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 3150e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Update the buffer. 3160e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 3170e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff} 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-constant: [C99 6.4.4.1] 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant integer-suffix 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant integer-suffix 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant integer-suffix 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// decimal-constant: 3255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant digit 3271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// octal-constant: 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant octal-digit 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// hexadecimal-constant: 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix hexadecimal-digit 3325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant hexadecimal-digit 3335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix: one of 3345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0x 0X 3355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-suffix: 3365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-suffix] 3375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-long-suffix] 3385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix [unsigned-suffix] 3395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix [unsigned-sufix] 3405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit: 3415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1 2 3 4 5 6 7 8 9 3425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit: 3435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 3445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-digit: 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 8 9 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a b c d e f 3475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// A B C D E F 3485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix: one of 3495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// u U 3505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix: one of 3515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// l L 3521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// long-long-suffix: one of 3535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ll LL 3545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// floating-constant: [C99 6.4.4.2] 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// TODO: add rules... 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser:: 3595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser(const char *begin, const char *end, 3605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation TokLoc, Preprocessor &pp) 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), ThisTokBegin(begin), ThisTokEnd(end) { 3621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 363c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // This routine assumes that the range begin/end matches the regex for integer 364c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // and FP constants (specifically, the 'pp-number' regex), and assumes that 365c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // the byte at "*end" is both valid and not part of the regex. Because of 366c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // this, it doesn't have to check for 'overscan' in various places. 367c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner assert(!isalnum(*end) && *end != '.' && *end != '_' && 368c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner "Lexer didn't maximally munch?"); 3691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin = begin; 3715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = false; 3725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = false; 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = false; 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isUnsigned = false; 3755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLongLong = false; 3766e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = false; 377506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = false; 378b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = false; 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 3801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '0') { // parse radix 382368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ParseNumberStartingWithZero(TokLoc); 383368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (hadError) 384368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { // the first digit is non-zero 3865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 3875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 3885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 390016765e3453db2e302efe53905e99cdb25501234Christopher Lamb } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) { 391ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 3925f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner diag::err_invalid_decimal_digit) << StringRef(s, 1); 393ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 3955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 3965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 3975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 3985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 3991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 4004411f46050216a139ab2fc7ff145ec384d11ec7fChris Lattner if ((*s == 'e' || *s == 'E')) { // exponent 40170f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 4025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 4045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 4060b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 4075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 4080b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 409ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-begin), 410ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 411ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 4120b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SuffixBegin = s; 4181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 419506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Parse the suffix. At this point we can classify whether we have an FP or 420506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // integer constant. 421506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner bool isFPConstant = isFloatingLiteral(); 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 423506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Loop over all of the characters of the suffix. If we see something bad, 424506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // we break out of the loop. 425506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner for (; s != ThisTokEnd; ++s) { 426506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner switch (*s) { 427506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'f': // FP Suffix for "float" 428506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'F': 429506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (!isFPConstant) break; // Error for integer constant. 4306e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat || isLong) break; // FF, LF invalid. 4316e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = true; 432506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 433506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'u': 434506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'U': 435506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // Error for floating constant. 436506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isUnsigned) break; // Cannot be repeated. 437506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isUnsigned = true; 438506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 439506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'l': 440506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'L': 441506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isLong || isLongLong) break; // Cannot be repeated. 4426e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat) break; // LF invalid. 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 444506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Check for long long. The L's need to be adjacent and the same case. 445506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s+1 != ThisTokEnd && s[1] == s[0]) { 446506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // long long invalid for floats. 447506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isLongLong = true; 448506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner ++s; // Eat both of them. 449506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } else { 4505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = true; 4515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 452506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 453506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'i': 454c637415a96c16abc7e28ef83c6c105716f7e8936Chris Lattner case 'I': 4550c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (PP.getLangOptions().Microsoft) { 456a8be02b655b76e4dbe776b0c62bc3c450dc6feabFariborz Jahanian if (isFPConstant || isLong || isLongLong) break; 4576e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes 4580c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // Allow i8, i16, i32, i64, and i128. 459b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump if (s + 1 != ThisTokEnd) { 460b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump switch (s[1]) { 461b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '8': 462b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump s += 2; // i8 suffix 463b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = true; 4646e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 465b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '1': 4666e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 467d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[2] == '6') { 468d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 3; // i16 suffix 469d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 470d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 4716e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes else if (s[2] == '2') { 4726e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 3 == ThisTokEnd) break; 473d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[3] == '8') { 474d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 4; // i128 suffix 475d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 476d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 477b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump } 4786e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 479b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '3': 4806e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 481d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[2] == '2') { 482d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 3; // i32 suffix 483d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isLong = true; 484d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 485d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 4866e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 487b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '6': 4886e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 489d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet if (s[2] == '4') { 490d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet s += 3; // i64 suffix 491d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isLongLong = true; 492d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet isMicrosoftInteger = true; 493d062b604548be6e2f85f6f63a461702e5ea14115Francois Pichet } 4946e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 495b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump default: 496b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump break; 497b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump } 498b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump break; 4990c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 5000c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 5010c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // fall through. 502506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'j': 503506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'J': 504506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isImaginary) break; // Cannot be repeated. 505506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 506506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner diag::ext_imaginary_constant); 507506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = true; 508506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 510506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // If we reached here, there was an error. 511506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner break; 512506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } 5131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 514506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Report an error if there are any. 515506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s != ThisTokEnd) { 516ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 517ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner isFPConstant ? diag::err_invalid_suffix_float_constant : 518ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_suffix_integer_constant) 5195f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner << StringRef(SuffixBegin, ThisTokEnd-SuffixBegin); 520ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 521506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner return; 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 525368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// ParseNumberStartingWithZero - This method is called when the first character 526368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// of the number is found to be a zero. This means it is either an octal 527368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// number (like '04') or a hex number ('0x123a') a binary number ('0b1010') or 5281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// a floating point number (01239.123e4). Eat the prefix, determining the 529368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// radix etc. 530368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattnervoid NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) { 531368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner assert(s[0] == '0' && "Invalid method call"); 532368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 5331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 534368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle a hex number like 0x1234. 535368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if ((*s == 'x' || *s == 'X') && (isxdigit(s[1]) || s[1] == '.')) { 536368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 537368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 16; 538368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 539368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 540368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 541368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 542368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (*s == '.') { 543368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 544368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 545368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 546368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 547368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // A binary exponent can appear with or with a '.'. If dotted, the 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // binary exponent is required. 5498c723404c34e9347fae473489194e8c200c4ac83Sean Hunt if ((*s == 'p' || *s == 'P') && !PP.getLangOptions().CPlusPlus0x) { 550368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 551368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 552368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 553368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 554368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 5556ea623823f8532670480425b573f35115404b4a0Chris Lattner if (first_non_digit == s) { 556ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 557ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 558ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 5596ea623823f8532670480425b573f35115404b4a0Chris Lattner return; 560368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 5616ea623823f8532670480425b573f35115404b4a0Chris Lattner s = first_non_digit; 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5638c723404c34e9347fae473489194e8c200c4ac83Sean Hunt // In C++0x, we cannot support hexadecmial floating literals because 5648c723404c34e9347fae473489194e8c200c4ac83Sean Hunt // they conflict with user-defined literals, so we warn in previous 5658c723404c34e9347fae473489194e8c200c4ac83Sean Hunt // versions of C++ by default. 5668c723404c34e9347fae473489194e8c200c4ac83Sean Hunt if (PP.getLangOptions().CPlusPlus) 5678c723404c34e9347fae473489194e8c200c4ac83Sean Hunt PP.Diag(TokLoc, diag::ext_hexconstant_cplusplus); 5688c723404c34e9347fae473489194e8c200c4ac83Sean Hunt else if (!PP.getLangOptions().HexFloats) 569ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(TokLoc, diag::ext_hexconstant_invalid); 570368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (saw_period) { 571ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 572ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_hexconstant_requires_exponent); 573ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 574368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 575368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 576368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 5771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 578368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle simple binary numbers 0b01010 579368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'b' || *s == 'B') { 580368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // 0b101010 is a GCC extension. 581413d355e38755a71f106dbc0ac900ca989070916Chris Lattner PP.Diag(TokLoc, diag::ext_binary_literal); 582368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ++s; 583368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 2; 584368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 585368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipBinaryDigits(s); 586368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 587368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 588368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (isxdigit(*s)) { 589ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 5905f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner diag::err_invalid_binary_digit) << StringRef(s, 1); 591ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 592368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 593413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // Other suffixes will be diagnosed by the caller. 594368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 595368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 597368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // For now, the radix is set to 8. If we discover that we have a 598368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // floating point constant, the radix will change to 10. Octal floating 5991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // point constants are not permitted (only decimal and hexadecimal). 600368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 8; 601368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 602368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipOctalDigits(s); 603368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) 604368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; // Done, simple octal number like 01234 6051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 606413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have some other non-octal digit that *is* a decimal digit, see if 607413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // this is part of a floating point number like 094.123 or 09e1. 608413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (isdigit(*s)) { 609413d355e38755a71f106dbc0ac900ca989070916Chris Lattner const char *EndDecimal = SkipDigits(s); 610413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (EndDecimal[0] == '.' || EndDecimal[0] == 'e' || EndDecimal[0] == 'E') { 611413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = EndDecimal; 612413d355e38755a71f106dbc0ac900ca989070916Chris Lattner radix = 10; 613413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 614413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 6151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 616413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have a hex digit other than 'e' (which denotes a FP exponent) then 617413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // the code is using an incorrect base. 618368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (isxdigit(*s) && *s != 'e' && *s != 'E') { 619ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 6205f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner diag::err_invalid_octal_digit) << StringRef(s, 1); 621ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 622368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 623368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 625368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '.') { 626368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 627368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 628368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 629413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = SkipDigits(s); // Skip suffix. 630368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 631368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'e' || *s == 'E') { // exponent 632368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 633368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 634368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 635368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 636368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 637368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 638368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (first_non_digit != s) { 639368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = first_non_digit; 640368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else { 6411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 642ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 643ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 644368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 645368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 646368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 647368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner} 648368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 649368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// GetIntegerValue - Convert this numeric literal value to an APInt that 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// matches Val's input width. If there is an overflow, set Val to the low bits 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// of the result and return true. Otherwise, return false. 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool NumericLiteralParser::GetIntegerValue(llvm::APInt &Val) { 654a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // Fast path: Compute a conservative bound on the maximum number of 655a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // bits per digit in this radix. If we can't possibly overflow a 656a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // uint64 based on that bound then do the simple conversion to 657a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // integer. This avoids the expensive overflow checking below, and 658a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // handles the common cases that matter (small decimal integers and 659a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // hex/octal values which don't overflow). 660a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar unsigned MaxBitsPerDigit = 1; 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while ((1U << MaxBitsPerDigit) < radix) 662a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar MaxBitsPerDigit += 1; 663a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar if ((SuffixBegin - DigitsBegin) * MaxBitsPerDigit <= 64) { 664a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar uint64_t N = 0; 665a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar for (s = DigitsBegin; s != SuffixBegin; ++s) 666a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar N = N*radix + HexDigitValue(*s); 667a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 668a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // This will truncate the value to Val's input width. Simply check 669a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // for overflow by comparing. 670a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar Val = N; 671a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar return Val.getZExtValue() != N; 672a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar } 673a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 6745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val = 0; 6755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin; 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt RadixVal(Val.getBitWidth(), radix); 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt CharVal(Val.getBitWidth(), 0); 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt OldVal = Val; 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool OverflowOccurred = false; 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (s < SuffixBegin) { 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned C = HexDigitValue(*s++); 6841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this letter is out of bound for this radix, reject it. 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(C < radix && "NumericLiteralParser ctor should have rejected this"); 6871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CharVal = C; 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add the digit to the value in the appropriate radix. If adding in digits 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // made the value smaller, then this overflowed. 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OldVal = Val; 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Multiply by radix, did overflow occur on the multiply? 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val *= RadixVal; 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.udiv(RadixVal) != OldVal; 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add value, did overflow occur on the value? 699d70cb645702bdbb42aee58403306a7c47e0d901cDaniel Dunbar // (a + b) ult b <=> overflow 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val += CharVal; 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.ult(CharVal); 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return OverflowOccurred; 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 70694c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCallllvm::APFloat::opStatus 70794c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCallNumericLiteralParser::GetFloatValue(llvm::APFloat &Result) { 708427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek using llvm::APFloat; 7091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 710e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar unsigned n = std::min(SuffixBegin - ThisTokBegin, ThisTokEnd - ThisTokBegin); 71194c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCall return Result.convertFromString(StringRef(ThisTokBegin, n), 71294c939dc1d4958b62ea5a89294dd8b2905f3191fJohn McCall APFloat::rmNearestTiesToEven); 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCharLiteralParser::CharLiteralParser(const char *begin, const char *end, 7175cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor SourceLocation Loc, Preprocessor &PP, 7185cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor tok::TokenKind kind) { 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // At this point we know that the character matches the regex "L?'.*'". 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = false; 7211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7225cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Kind = kind; 7235cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor 7245cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Determine if this is a wide or UTF character. 7255cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (Kind == tok::wide_char_constant || Kind == tok::utf16_char_constant || 7265cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Kind == tok::utf32_char_constant) { 7275cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor ++begin; 7285cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 7291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over the entry quote. 7315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(begin[0] == '\'' && "Invalid token lexed"); 7325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++begin; 7335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // FIXME: The "Value" is an uint64_t so we can handle char literals of 735fc8f0e14ad142ed811e90fbd9a30e419e301c717Chris Lattner // up to 64-bits. 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This extensively assumes that 'char' is 8-bits. 73798be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getCharWidth() == 8 && 7385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes char is 8 bits"); 739e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner assert(PP.getTargetInfo().getIntWidth() <= 64 && 740e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner (PP.getTargetInfo().getIntWidth() & 7) == 0 && 741e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner "Assumes sizeof(int) on target is <= 64 and a multiple of char"); 742e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner assert(PP.getTargetInfo().getWCharWidth() <= 64 && 743e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner "Assumes sizeof(wchar) on target is <= 64"); 7444bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 7451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // This is what we will use for overflow detection 7464bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta llvm::APInt LitVal(PP.getTargetInfo().getIntWidth(), 0); 7471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 748e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner unsigned NumCharsSoFar = 0; 7491c6c64b5181a960c7d4cace4995a938d4dfa6fbfChris Lattner bool Warned = false; 7505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (begin[0] != '\'') { 7514bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta uint64_t ResultChar; 75259705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber 75359705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber // Is this a Universal Character Name escape? 7545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (begin[0] != '\\') // If this is a normal character, consume it. 7555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = *begin++; 75659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber else { // Otherwise, this is an escape character. 75759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber // Check for UCN. 75859705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber if (begin[1] == 'u' || begin[1] == 'U') { 75959705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber uint32_t utf32 = 0; 76059705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber unsigned short UcnLen = 0; 761872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner if (!ProcessUCNEscape(begin, end, utf32, UcnLen, 762872a45e91778eb0b706ff57272fe547d4512eb19Chris Lattner FullSourceLoc(Loc, PP.getSourceManager()), 7636c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner &PP.getDiagnostics(), PP.getLangOptions())) { 76459705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber HadError = 1; 76559705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber } 76659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber ResultChar = utf32; 76759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber } else { 76859705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber // Otherwise, this is a non-UCN escape character. Process it. 7695cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor unsigned CharWidth = getCharWidth(Kind, PP.getTargetInfo()); 77091f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner ResultChar = ProcessCharEscape(begin, end, HadError, 77191f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner FullSourceLoc(Loc,PP.getSourceManager()), 7725cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharWidth, &PP.getDiagnostics()); 77359705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber } 77459705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber } 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a multi-character constant (e.g. 'abc'), handle it. These are 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // implementation defined (C99 6.4.4.4p10). 778e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (NumCharsSoFar) { 7795cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!isAscii()) { 7805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Emulate GCC's (unintentional?) behavior: L'ab' -> L'b'. 7814bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal = 0; 7825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 7835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Narrow character literals act as though their value is concatenated 784e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // in this implementation, but warn on overflow. 7851c6c64b5181a960c7d4cace4995a938d4dfa6fbfChris Lattner if (LitVal.countLeadingZeros() < 8 && !Warned) { 7865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_char_constant_too_large); 7871c6c64b5181a960c7d4cace4995a938d4dfa6fbfChris Lattner Warned = true; 7881c6c64b5181a960c7d4cace4995a938d4dfa6fbfChris Lattner } 7894bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal <<= 8; 7905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7934bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal = LitVal + ResultChar; 794e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner ++NumCharsSoFar; 795e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner } 796e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner 797e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // If this is the second character being processed, do special handling. 798e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (NumCharsSoFar > 1) { 799e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // Warn about discarding the top bits for multi-char wide-character 800e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // constants (L'abcd'). 8015cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (!isAscii()) 8025cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor PP.Diag(Loc, diag::warn_extraneous_char_constant); 803e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner else if (NumCharsSoFar != 4) 804e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner PP.Diag(Loc, diag::ext_multichar_character_literal); 805e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner else 806e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner PP.Diag(Loc, diag::ext_four_char_character_literal); 8072a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman IsMultiChar = true; 808930b71a4a7dedf70a73e5fd875bae7df452b80a9Daniel Dunbar } else 809930b71a4a7dedf70a73e5fd875bae7df452b80a9Daniel Dunbar IsMultiChar = false; 8104bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 8114bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // Transfer the value from APInt to uint64_t 8124bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta Value = LitVal.getZExtValue(); 8131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8145cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (((isWide() && PP.getLangOptions().ShortWChar) || isUTF16()) && 8155cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Value > 0xFFFF) 81659705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber PP.Diag(Loc, diag::warn_ucn_escape_too_large); 81759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber 8185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a single narrow character, sign extend it (e.g. '\xFF' is "-1") 8195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if 'char' is signed for this target (C99 6.4.4.4p10). Note that multiple 8205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // character constants are not sign extended in the this implementation: 8215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // '\xFF\xFF' = 65536 and '\x0\xFF' = 255, which matches GCC. 8225cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (isAscii() && NumCharsSoFar == 1 && (Value & 128) && 82315b91764d08e886391c865c4a444d7b51141c284Eli Friedman PP.getLangOptions().CharIsSigned) 8245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = (signed char)Value; 8255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 8265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal: [C99 6.4.5] 8295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// " [s-char-sequence] " 8305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// L" [s-char-sequence] " 8315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence: 8325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char 8335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence s-char 8345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char: 8355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// any source character except the double quote ", 8365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// backslash \, or newline character 8375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character 8385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 8395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character: [C99 6.4.4.4] 8405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ escape-code 8415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 8425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-code: 8435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code 8445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code 8455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code 8465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code: one of 8475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// n t b r f v a 8485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ ' " ? 8495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code: 8505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit 8515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit 8525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit octal-digit 8535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code: 8545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// x hex-digit 8555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code hex-digit 8565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name: 8575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \u hex-quad 8585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \U hex-quad hex-quad 8595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-quad: 8605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-digit hex-digit hex-digit hex-digit 8615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 8625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteralParser:: 863d217773f106856a11879ec79dc468efefaf2ee75Chris LattnerStringLiteralParser(const Token *StringToks, unsigned NumStringToks, 8640833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner Preprocessor &PP, bool Complain) 8650833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner : SM(PP.getSourceManager()), Features(PP.getLangOptions()), 866403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis Target(PP.getTargetInfo()), Diags(Complain ? &PP.getDiagnostics() : 0), 8675cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor MaxTokenLength(0), SizeBound(0), CharByteWidth(0), Kind(tok::unknown), 8685cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor ResultPtr(ResultBuf.data()), hadError(false), Pascal(false) { 8690833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner init(StringToks, NumStringToks); 8700833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner} 8710833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner 8720833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattnervoid StringLiteralParser::init(const Token *StringToks, unsigned NumStringToks){ 873403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis // The literal token may have come from an invalid source location (e.g. due 874403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis // to a PCH error), in which case the token length will be 0. 875403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis if (NumStringToks == 0 || StringToks[0].getLength() < 2) { 876403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis hadError = true; 877403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis return; 878403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis } 879403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis 8805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan all of the string portions, remember the max individual token length, 8815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // computing a bound on the concatenated string length, and see whether any 8825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // piece is a wide-string. If any of the string portions is a wide-string 8835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // literal, the result is a wide-string literal [C99 6.4.5p4]. 884403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis assert(NumStringToks && "expected at least one token"); 8856cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt MaxTokenLength = StringToks[0].getLength(); 886403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis assert(StringToks[0].getLength() >= 2 && "literal token is invalid!"); 8876cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt SizeBound = StringToks[0].getLength()-2; // -2 for "". 8885cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Kind = StringToks[0].getKind(); 8896cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt 8906cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt hadError = false; 8915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Implement Translation Phase #6: concatenation of string literals 8935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// (C99 5.1.1.2p1). The common case is only one string fragment. 8945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1; i != NumStringToks; ++i) { 895403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis if (StringToks[i].getLength() < 2) { 896403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis hadError = true; 897403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis return; 898403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis } 899403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis 9005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The string could be shorter than this if it needs cleaning, but this is a 9015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reasonable bound, which is all we need. 902403de3f932b5d1d3e4e58f69960000911d04dd2aArgyrios Kyrtzidis assert(StringToks[i].getLength() >= 2 && "literal token is invalid!"); 9036cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt SizeBound += StringToks[i].getLength()-2; // -2 for "". 9041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember maximum string piece length. 9066cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt if (StringToks[i].getLength() > MaxTokenLength) 9076cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt MaxTokenLength = StringToks[i].getLength(); 9081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9095cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Remember if we see any wide or utf-8/16/32 strings. 9105cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Also check for illegal concatenations. 9115cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (StringToks[i].isNot(Kind) && StringToks[i].isNot(tok::string_literal)) { 9125cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (isAscii()) { 9135cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Kind = StringToks[i].getKind(); 9145cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } else { 9155cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (Diags) 9165cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor Diags->Report(FullSourceLoc(StringToks[i].getLocation(), SM), 9175cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor diag::err_unsupported_string_concat); 9185cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor hadError = true; 9195cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 9205cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor } 9215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 922dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 9235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Include space for the null terminator. 9245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++SizeBound; 9251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R warning: "traditional C rejects string constant concatenation" 9271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9285cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Get the width in bytes of char/wchar_t/char16_t/char32_t 9295cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharByteWidth = getCharWidth(Kind, Target); 9305cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple"); 9315cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharByteWidth /= 8; 9321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The output buffer size needs to be large enough to hold wide characters. 9345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This is a worst-case assumption which basically corresponds to L"" "long". 9355cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor SizeBound *= CharByteWidth; 9361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Size the temporary buffer to hold the result string data. 9385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultBuf.resize(SizeBound); 9391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Likewise, but for each string piece. 9415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallString<512> TokenBuf; 9425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TokenBuf.resize(MaxTokenLength); 9431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Loop over all the strings, getting their spelling, and expanding them to 9455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // wide strings as appropriate. 9465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr = &ResultBuf[0]; // Next byte to fill in. 9471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 948ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = false; 9491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = NumStringToks; i != e; ++i) { 9515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokBuf = &TokenBuf[0]; 9525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the spelling of the token, which eliminates trigraphs, etc. We know 9535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that ThisTokBuf points to a buffer that is big enough for the whole token 9545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and 'spelled' tokens can only shrink. 95550f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor bool StringInvalid = false; 9560833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner unsigned ThisTokLen = 957b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner Lexer::getSpelling(StringToks[i], ThisTokBuf, SM, Features, 958b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner &StringInvalid); 95950f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor if (StringInvalid) { 9605cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor hadError = true; 96150f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor continue; 96250f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor } 96350f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor 9645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd = ThisTokBuf+ThisTokLen-1; // Skip end quote. 9655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Input character set mapping support. 9661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9671661d717563d6a27dec3da69deba2b2efaa45802Craig Topper // Skip marker for wide or unicode strings. 9685cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (ThisTokBuf[0] == 'L' || ThisTokBuf[0] == 'u' || ThisTokBuf[0] == 'U') { 9695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 9705cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor // Skip 8 of u8 marker for utf8 strings. 9715cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (ThisTokBuf[0] == '8') 9725cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor ++ThisTokBuf; 97356bedefe92ae8f604d14bea75cc3040ab32337c2Fariborz Jahanian } 9741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(ThisTokBuf[0] == '"' && "Expected quote, lexer broken?"); 9765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 9771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 978ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Check if this is a pascal string 979a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner if (Features.PascalStrings && ThisTokBuf + 1 != ThisTokEnd && 980ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf[0] == '\\' && ThisTokBuf[1] == 'p') { 9811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 982ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // If the \p sequence is found in the first token, we have a pascal string 983ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Otherwise, if we already have a pascal string, ignore the first \p 984ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (i == 0) { 985ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ++ThisTokBuf; 986ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = true; 987ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } else if (Pascal) 988ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf += 2; 989ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } 9901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (ThisTokBuf != ThisTokEnd) { 9925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Is this a span of non-escape characters? 9935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] != '\\') { 9945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *InStart = ThisTokBuf; 9955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 9965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 9975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && ThisTokBuf[0] != '\\'); 9981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Copy the character span over. 10005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned Len = ThisTokBuf-InStart; 10015cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor if (CharByteWidth == 1) { 10025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer memcpy(ResultPtr, InStart, Len); 10035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr += Len; 10045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 10055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Note: our internal rep of wide char tokens is always little-endian. 10065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; Len; --Len, ++InStart) { 10075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = InStart[0]; 10085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add zeros at the end. 10095cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor for (unsigned i = 1, e = CharByteWidth; i != e; ++i) 10100e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff *ResultPtr++ = 0; 10115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 10145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10154e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Is this a Universal Character Name escape? 10160e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (ThisTokBuf[1] == 'u' || ThisTokBuf[1] == 'U') { 101759705aee3fe01aa6fb6962dd11350161b47983d9Nico Weber EncodeUCNEscape(ThisTokBuf, ThisTokEnd, ResultPtr, 1018a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner hadError, FullSourceLoc(StringToks[i].getLocation(),SM), 10195cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharByteWidth, Diags, Features); 10204e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff continue; 10214e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff } 10224e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Otherwise, this is a non-UCN escape character. Process it. 102391f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner unsigned ResultChar = 102491f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner ProcessCharEscape(ThisTokBuf, ThisTokEnd, hadError, 10256c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner FullSourceLoc(StringToks[i].getLocation(), SM), 10265cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharByteWidth*8, Diags); 10271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10284e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Note: our internal rep of wide char tokens is always little-endian. 10294e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff *ResultPtr++ = ResultChar & 0xFF; 10301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10315cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor for (unsigned i = 1, e = CharByteWidth; i != e; ++i) 10325cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor *ResultPtr++ = ResultChar >> i*8; 10335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1036bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner if (Pascal) { 1037ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ResultBuf[0] = ResultPtr-&ResultBuf[0]-1; 10385cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor ResultBuf[0] /= CharByteWidth; 1039bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner 1040bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner // Verify that pascal strings aren't too large. 10410833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner if (GetStringLength() > 256) { 10420833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner if (Diags) 10430833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner Diags->Report(FullSourceLoc(StringToks[0].getLocation(), SM), 10440833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner diag::err_pascal_string_too_long) 10450833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner << SourceRange(StringToks[0].getLocation(), 10460833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner StringToks[NumStringToks-1].getLocation()); 10475cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor hadError = true; 104857d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman return; 104957d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman } 10500833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner } else if (Diags) { 1051427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor // Complain if this string literal has too many characters. 1052a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner unsigned MaxChars = Features.CPlusPlus? 65536 : Features.C99 ? 4095 : 509; 1053427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor 1054427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor if (GetNumStringChars() > MaxChars) 10550833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner Diags->Report(FullSourceLoc(StringToks[0].getLocation(), SM), 10560833dd0675c25cbb35671c7a2006d511d5c77ce3Chris Lattner diag::ext_string_too_long) 1057427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor << GetNumStringChars() << MaxChars 1058a95880d6513c617bb96634bcc1f16c6bdb80dedcChris Lattner << (Features.CPlusPlus ? 2 : Features.C99 ? 1 : 0) 1059427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor << SourceRange(StringToks[0].getLocation(), 1060427c492d368d6ecf409fa8053eecb5cd0e779c5bDouglas Gregor StringToks[NumStringToks-1].getLocation()); 1061bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner } 10625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1063719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 1064719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 1065719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// getOffsetOfStringByte - This function returns the offset of the 1066719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// specified byte of the string data represented by Token. This handles 1067719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// advancing over escape sequences in the string. 1068719e61573f27c11057ecfe0dd8f141621602c571Chris Lattnerunsigned StringLiteralParser::getOffsetOfStringByte(const Token &Tok, 10696c66f07854c1334a1ce9eae1428d61d54182a6e1Chris Lattner unsigned ByteNo) const { 1070719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Get the spelling of the token. 1071ca1475ea0e76da6b852796610139ed9b49c8d4a6Chris Lattner llvm::SmallString<32> SpellingBuffer; 10726cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt SpellingBuffer.resize(Tok.getLength()); 10731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 107450f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor bool StringInvalid = false; 1075719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingPtr = &SpellingBuffer[0]; 1076b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner unsigned TokLen = Lexer::getSpelling(Tok, SpellingPtr, SM, Features, 1077b0607279cb98bbf2bbfe0db170aed39ef91e86a2Chris Lattner &StringInvalid); 107891f54ce93bec136fb9e18740b895cf1c1339524bChris Lattner if (StringInvalid) 107950f6af7a6d6951a63f3da7d4c5a7d3965bf73b63Douglas Gregor return 0; 1080719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 10815cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor assert(SpellingPtr[0] != 'L' && SpellingPtr[0] != 'u' && 10825cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor SpellingPtr[0] != 'U' && "Doesn't handle wide or utf strings yet"); 1083719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 10841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1085719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingStart = SpellingPtr; 1086719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingEnd = SpellingPtr+TokLen; 1087719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 1088719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Skip over the leading quote. 1089719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr[0] == '"' && "Should be a string literal!"); 1090719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 10911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1092719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Skip over bytes until we find the offset we're looking for. 1093719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner while (ByteNo) { 1094719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr < SpellingEnd && "Didn't find byte offset!"); 10951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1096719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Step over non-escapes simply. 1097719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner if (*SpellingPtr != '\\') { 1098719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 1099719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner --ByteNo; 1100719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner continue; 1101719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 11021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1103719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Otherwise, this is an escape character. Advance over it. 1104719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner bool HadError = false; 1105719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ProcessCharEscape(SpellingPtr, SpellingEnd, HadError, 1106ca1475ea0e76da6b852796610139ed9b49c8d4a6Chris Lattner FullSourceLoc(Tok.getLocation(), SM), 11075cee1195584fa8672253139c86e922daeda69b9eDouglas Gregor CharByteWidth*8, Diags); 1108719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(!HadError && "This method isn't valid on erroneous strings"); 1109719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner --ByteNo; 1110719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 11111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1112719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner return SpellingPtr-SpellingStart; 1113719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner} 1114