LiteralSupport.cpp revision 70f66ab053f36ab3df7a778d09bcb2b4b0fec1f8
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" 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/Diagnostic.h" 18136f93a2b660fc780fc2dba82a6f42ca4dc9164aChris Lattner#include "clang/Basic/SourceManager.h" 19136f93a2b660fc780fc2dba82a6f42ca4dc9164aChris Lattner#include "clang/Basic/TargetInfo.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/ADT/StringExtras.h" 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HexDigitValue - Return the value of the specified hex digit, or -1 if it's 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// not valid. 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstatic int HexDigitValue(char C) { 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= '0' && C <= '9') return C-'0'; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= 'a' && C <= 'f') return C-'a'+10; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= 'A' && C <= 'F') return C-'A'+10; 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return -1; 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ProcessCharEscape - Parse a standard C escape sequence, which can occur in 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// either a character or a string literal. 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstatic unsigned ProcessCharEscape(const char *&ThisTokBuf, 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd, bool &HadError, 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation Loc, bool IsWide, 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Preprocessor &PP) { 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip the '\' char. 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that this character can't be off the end of the buffer, because 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that would have been \", which would not have been the end of string. 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar = *ThisTokBuf++; 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (ResultChar) { 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These map to themselves. 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '\\': case '\'': case '"': case '?': break; 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These have fixed mappings. 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'a': 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R: the meaning of '\\a' is different in traditional C 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 7; 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'b': 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 8; 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'e': 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::ext_nonstandard_escape, "e"); 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 27; 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'f': 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 12; 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'n': 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 10; 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'r': 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 13; 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 't': 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 9; 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'v': 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 11; 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer //case 'u': case 'U': // FIXME: UCNs. 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'x': { // Hex escape. 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::err_hex_escape_no_digits); 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = 1; 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Hex escapes are a maximal series of hex digits. 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Overflow = false; 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; ThisTokBuf != ThisTokEnd; ++ThisTokBuf) { 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer int CharVal = HexDigitValue(ThisTokBuf[0]); 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharVal == -1) break; 90b8128140956c6f8f0ab143818775a81f4b4aa477Chris Lattner Overflow |= (ResultChar & 0xF0000000) ? true : false; // About to shift out a digit? 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 4; 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= CharVal; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See if any bits will be truncated when evaluated as a character. 9698be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharWidth = PP.getTargetInfo().getCharWidth(IsWide); 979c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Overflow = true; 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Overflow) // Too many digits to fit in 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_hex_escape_too_large); 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '0': case '1': case '2': case '3': 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '4': case '5': case '6': case '7': { 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes. 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --ThisTokBuf; 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes are a series of octal digits with maximum length 3. 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // "\0123" is a two digit sequence equal to "\012" "3". 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumDigits = 0; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 3; 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= *ThisTokBuf++ - '0'; 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumDigits; 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && NumDigits < 3 && 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisTokBuf[0] >= '0' && ThisTokBuf[0] <= '7'); 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. Reject '\777', but not L'\777'. 12598be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharWidth = PP.getTargetInfo().getCharWidth(IsWide); 1269c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_octal_escape_too_large); 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, these are not valid escapes. 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '(': case '{': case '[': case '%': 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // GCC accepts these as extensions. We warn about them as such though. 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!PP.getLangOptions().NoExtensions) { 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::ext_nonstandard_escape, 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer std::string()+(char)ResultChar); 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (isgraph(ThisTokBuf[0])) { 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::ext_unknown_escape, std::string()+(char)ResultChar); 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::ext_unknown_escape, "x"+llvm::utohexstr(ResultChar)); 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ResultChar; 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-constant: [C99 6.4.4.1] 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant integer-suffix 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant integer-suffix 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant integer-suffix 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant: 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant digit 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant: 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant octal-digit 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant: 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix hexadecimal-digit 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant hexadecimal-digit 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix: one of 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0x 0X 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-suffix: 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-suffix] 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-long-suffix] 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix [unsigned-suffix] 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix [unsigned-sufix] 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit: 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1 2 3 4 5 6 7 8 9 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit: 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-digit: 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 8 9 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a b c d e f 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// A B C D E F 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix: one of 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// u U 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix: one of 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// l L 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix: one of 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ll LL 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// floating-constant: [C99 6.4.4.2] 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// TODO: add rules... 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser:: 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser(const char *begin, const char *end, 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation TokLoc, Preprocessor &pp) 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), ThisTokBegin(begin), ThisTokEnd(end) { 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin = begin; 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = false; 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = false; 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = false; 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isUnsigned = false; 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLongLong = false; 2076e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = false; 208506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = false; 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '0') { // parse radix 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if ((*s == 'x' || *s == 'X') && (isxdigit(s[1]) || s[1] == '.')) { 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 16; 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DigitsBegin = s; 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipHexDigits(s); 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipHexDigits(s); 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // A binary exponent can appear with or with a '.'. If dotted, the 2265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // binary exponent is required. 22770f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner if ((*s == 'p' || *s == 'P') && PP.getLangOptions().HexFloats) { 22870f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 2295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 2330b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 2350b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 23670f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-begin), 2370b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_exponent_has_no_digits); 2380b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (saw_period) { 2410b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 2420b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_hexconstant_requires_exponent); 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == 'b' || *s == 'B') { 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // 0b101010 is a GCC extension. 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++s; 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 2; 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DigitsBegin = s; 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipBinaryDigits(s); 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (isxdigit(*s)) { 2540b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 2550b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_invalid_binary_digit, std::string(s, s+1)); 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(TokLoc, diag::ext_binary_literal); 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // For now, the radix is set to 8. If we discover that we have a 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // floating point constant, the radix will change to 10. Octal floating 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // point constants are not permitted (only decimal and hexadecimal). 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 8; 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer DigitsBegin = s; 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipOctalDigits(s); 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 268016765e3453db2e302efe53905e99cdb25501234Christopher Lamb } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) { 2690b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 2700b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_invalid_octal_digit, std::string(s, s+1)); 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == 'e' || *s == 'E') { // exponent 27970f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 2850b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 2870b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 28870f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-begin), 2890b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_exponent_has_no_digits); 2900b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { // the first digit is non-zero 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 299016765e3453db2e302efe53905e99cdb25501234Christopher Lamb } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) { 3000b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 3010b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_invalid_decimal_digit, std::string(s, s+1)); 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 3065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == 'e' || *s == 'E') { // exponent 30970f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 3140b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 3155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 3160b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 31770f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-begin), 3180b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_exponent_has_no_digits); 3190b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SuffixBegin = s; 325506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 326506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Parse the suffix. At this point we can classify whether we have an FP or 327506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // integer constant. 328506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner bool isFPConstant = isFloatingLiteral(); 329506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 330506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Loop over all of the characters of the suffix. If we see something bad, 331506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // we break out of the loop. 332506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner for (; s != ThisTokEnd; ++s) { 333506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner switch (*s) { 334506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'f': // FP Suffix for "float" 335506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'F': 336506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (!isFPConstant) break; // Error for integer constant. 3376e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat || isLong) break; // FF, LF invalid. 3386e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = true; 339506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 340506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'u': 341506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'U': 342506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // Error for floating constant. 343506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isUnsigned) break; // Cannot be repeated. 344506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isUnsigned = true; 345506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 346506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'l': 347506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'L': 348506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isLong || isLongLong) break; // Cannot be repeated. 3496e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat) break; // LF invalid. 350506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 351506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Check for long long. The L's need to be adjacent and the same case. 352506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s+1 != ThisTokEnd && s[1] == s[0]) { 353506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // long long invalid for floats. 354506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isLongLong = true; 355506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner ++s; // Eat both of them. 356506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } else { 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = true; 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 359506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 360506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'i': 3610c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (PP.getLangOptions().Microsoft) { 3620c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // Allow i8, i16, i32, i64, and i128. 3630c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3640c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff switch (*s) { 3650c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '8': 3660c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff s++; // i8 suffix 3670c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3680c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '1': 3690c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3700c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '6') s++; // i16 suffix 3710c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff else if (*s == '2') { 3720c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3730c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '8') s++; // i128 suffix 3740c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3750c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3760c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '3': 3770c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3780c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '2') s++; // i32 suffix 3790c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3800c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '6': 3810c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3820c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '4') s++; // i64 suffix 3830c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3840c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff default: 3850c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3860c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3870c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3880c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3890c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // fall through. 390506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'I': 391506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'j': 392506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'J': 393506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isImaginary) break; // Cannot be repeated. 394506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 395506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner diag::ext_imaginary_constant); 396506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = true; 397506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 3985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 399506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // If we reached here, there was an error. 400506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner break; 401506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } 402506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 403506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Report an error if there are any. 404506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s != ThisTokEnd) { 4050b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 4060b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner isFPConstant ? diag::err_invalid_suffix_float_constant : 4070b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner diag::err_invalid_suffix_integer_constant, 408506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner std::string(SuffixBegin, ThisTokEnd)); 409506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner return; 4105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// GetIntegerValue - Convert this numeric literal value to an APInt that 4145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// matches Val's input width. If there is an overflow, set Val to the low bits 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// of the result and return true. Otherwise, return false. 4165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool NumericLiteralParser::GetIntegerValue(llvm::APInt &Val) { 4175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val = 0; 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin; 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt RadixVal(Val.getBitWidth(), radix); 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt CharVal(Val.getBitWidth(), 0); 4225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt OldVal = Val; 4235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool OverflowOccurred = false; 4255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (s < SuffixBegin) { 4265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned C = HexDigitValue(*s++); 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this letter is out of bound for this radix, reject it. 4295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(C < radix && "NumericLiteralParser ctor should have rejected this"); 4305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CharVal = C; 4325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add the digit to the value in the appropriate radix. If adding in digits 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // made the value smaller, then this overflowed. 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OldVal = Val; 4365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Multiply by radix, did overflow occur on the multiply? 4385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val *= RadixVal; 4395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.udiv(RadixVal) != OldVal; 4405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OldVal = Val; 4425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add value, did overflow occur on the value? 4435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val += CharVal; 4445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.ult(OldVal); 4455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.ult(CharVal); 4465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return OverflowOccurred; 4485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 450525a05093a4816af961fe2bc6b8a81c17e2e26c2Chris Lattnerllvm::APFloat NumericLiteralParser:: 451427d5af5b601985093b6b4b33ba1e30fc24d86dcTed KremenekGetFloatValue(const llvm::fltSemantics &Format, bool* isExact) { 452427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek using llvm::APFloat; 453427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 45432e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek llvm::SmallVector<char,256> floatChars; 45532e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek for (unsigned i = 0, n = ThisTokEnd-ThisTokBegin; i != n; ++i) 45632e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back(ThisTokBegin[i]); 45732e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 45832e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back('\0'); 45932e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 460427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat V (Format, APFloat::fcZero, false); 461427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat::opStatus status; 46232e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 46332e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek status = V.convertFromString(&floatChars[0],APFloat::rmNearestTiesToEven); 464427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 465427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek if (isExact) 466427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek *isExact = status == APFloat::opOK; 467427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 468427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek return V; 4695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencervoid NumericLiteralParser::Diag(SourceLocation Loc, unsigned DiagID, 4725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const std::string &M) { 4735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, DiagID, M); 4745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = true; 4755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCharLiteralParser::CharLiteralParser(const char *begin, const char *end, 4795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation Loc, Preprocessor &PP) { 4805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // At this point we know that the character matches the regex "L?'.*'". 4815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = false; 4825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = 0; 4835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Determine if this is a wide character. 4855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IsWide = begin[0] == 'L'; 4865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) ++begin; 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over the entry quote. 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(begin[0] == '\'' && "Invalid token lexed"); 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++begin; 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This assumes that 'int' is 32-bits in overflow calculation, and the 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // size of "value". 49498be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getIntWidth() == 32 && 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes sizeof(int) == 4 for now"); 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This assumes that wchar_t is 32-bits for now. 49798be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getWCharWidth() == 32 && 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes sizeof(wchar_t) == 4 for now"); 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This extensively assumes that 'char' is 8-bits. 50098be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getCharWidth() == 8 && 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes char is 8 bits"); 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstChar = true; 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isMultiChar = false; 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (begin[0] != '\'') { 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar; 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (begin[0] != '\\') // If this is a normal character, consume it. 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = *begin++; 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else // Otherwise, this is an escape character. 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = ProcessCharEscape(begin, end, HadError, Loc, IsWide, PP); 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a multi-character constant (e.g. 'abc'), handle it. These are 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // implementation defined (C99 6.4.4.4p10). 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isFirstChar) { 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is the second character being processed, do special handling. 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isMultiChar) { 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isMultiChar = true; 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Warn about discarding the top bits for multi-char wide-character 5205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // constants (L'abcd'). 5215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) 5225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_extraneous_wide_char_constant); 5235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) { 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Emulate GCC's (unintentional?) behavior: L'ab' -> L'b'. 5275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = 0; 5285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 5295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Narrow character literals act as though their value is concatenated 5305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // in this implementation. 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (((Value << 8) >> 8) != Value) 5325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_char_constant_too_large); 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value <<= 8; 5345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value += ResultChar; 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstChar = false; 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a single narrow character, sign extend it (e.g. '\xFF' is "-1") 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if 'char' is signed for this target (C99 6.4.4.4p10). Note that multiple 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // character constants are not sign extended in the this implementation: 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // '\xFF\xFF' = 65536 and '\x0\xFF' = 255, which matches GCC. 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!IsWide && !isMultiChar && (Value & 128) && 54698be4943e8dc4f3905629a7102668960873cf863Chris Lattner PP.getTargetInfo().isCharSigned()) 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = (signed char)Value; 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal: [C99 6.4.5] 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// " [s-char-sequence] " 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// L" [s-char-sequence] " 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence: 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence s-char 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char: 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// any source character except the double quote ", 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// backslash \, or newline character 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character: [C99 6.4.4.4] 5635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ escape-code 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-code: 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code: one of 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// n t b r f v a 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ ' " ? 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code: 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit octal-digit 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code: 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// x hex-digit 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code hex-digit 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name: 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \u hex-quad 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \U hex-quad hex-quad 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-quad: 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-digit hex-digit hex-digit hex-digit 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteralParser:: 586d217773f106856a11879ec79dc468efefaf2ee75Chris LattnerStringLiteralParser(const Token *StringToks, unsigned NumStringToks, 5875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Preprocessor &pp, TargetInfo &t) 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), Target(t) { 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan all of the string portions, remember the max individual token length, 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // computing a bound on the concatenated string length, and see whether any 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // piece is a wide-string. If any of the string portions is a wide-string 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // literal, the result is a wide-string literal [C99 6.4.5p4]. 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[0].getLength(); 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound = StringToks[0].getLength()-2; // -2 for "". 59522f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide = StringToks[0].is(tok::wide_string_literal); 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Implement Translation Phase #6: concatenation of string literals 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// (C99 5.1.1.2p1). The common case is only one string fragment. 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1; i != NumStringToks; ++i) { 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The string could be shorter than this if it needs cleaning, but this is a 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reasonable bound, which is all we need. 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound += StringToks[i].getLength()-2; // -2 for "". 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember maximum string piece length. 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StringToks[i].getLength() > MaxTokenLength) 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[i].getLength(); 6095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember if we see any wide strings. 61122f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide |= StringToks[i].is(tok::wide_string_literal); 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Include space for the null terminator. 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++SizeBound; 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R warning: "traditional C rejects string constant concatenation" 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the width in bytes of wchar_t. If no wchar_t strings are used, do not 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // query the target. As such, wchar_tByteWidth is only valid if AnyWide=true. 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth = ~0U; 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 62498be4943e8dc4f3905629a7102668960873cf863Chris Lattner wchar_tByteWidth = Target.getWCharWidth(); 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert((wchar_tByteWidth & 7) == 0 && "Assumes wchar_t is byte multiple!"); 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth /= 8; 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The output buffer size needs to be large enough to hold wide characters. 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This is a worst-case assumption which basically corresponds to L"" "long". 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound *= wchar_tByteWidth; 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Size the temporary buffer to hold the result string data. 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultBuf.resize(SizeBound); 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Likewise, but for each string piece. 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallString<512> TokenBuf; 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TokenBuf.resize(MaxTokenLength); 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Loop over all the strings, getting their spelling, and expanding them to 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // wide strings as appropriate. 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr = &ResultBuf[0]; // Next byte to fill in. 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 645ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = false; 646ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = NumStringToks; i != e; ++i) { 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokBuf = &TokenBuf[0]; 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the spelling of the token, which eliminates trigraphs, etc. We know 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that ThisTokBuf points to a buffer that is big enough for the whole token 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and 'spelled' tokens can only shrink. 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ThisTokLen = PP.getSpelling(StringToks[i], ThisTokBuf); 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd = ThisTokBuf+ThisTokLen-1; // Skip end quote. 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Input character set mapping support. 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip L marker for wide strings. 6585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool ThisIsWide = false; 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] == 'L') { 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisIsWide = true; 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(ThisTokBuf[0] == '"' && "Expected quote, lexer broken?"); 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 667ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Check if this is a pascal string 668ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (pp.getLangOptions().PascalStrings && ThisTokBuf + 1 != ThisTokEnd && 669ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf[0] == '\\' && ThisTokBuf[1] == 'p') { 670ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 671ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // If the \p sequence is found in the first token, we have a pascal string 672ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Otherwise, if we already have a pascal string, ignore the first \p 673ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (i == 0) { 674ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ++ThisTokBuf; 675ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = true; 676ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } else if (Pascal) 677ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf += 2; 678ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } 679ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 6805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (ThisTokBuf != ThisTokEnd) { 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Is this a span of non-escape characters? 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] != '\\') { 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *InStart = ThisTokBuf; 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && ThisTokBuf[0] != '\\'); 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Copy the character span over. 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned Len = ThisTokBuf-InStart; 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!AnyWide) { 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer memcpy(ResultPtr, InStart, Len); 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr += Len; 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Note: our internal rep of wide char tokens is always little-endian. 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; Len; --Len, ++InStart) { 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = InStart[0]; 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add zeros at the end. 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = 0; 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this is an escape character. Process it. 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar = ProcessCharEscape(ThisTokBuf, ThisTokEnd, hadError, 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StringToks[i].getLocation(), 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisIsWide, PP); 7095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Note: our internal rep of wide char tokens is always little-endian. 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = ResultChar & 0xFF; 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = ResultChar >> i*8; 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add zero terminator. 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr = 0; 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 7245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = 0; 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 726ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 727ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (Pascal) 728ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ResultBuf[0] = ResultPtr-&ResultBuf[0]-1; 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 730