LiteralSupport.cpp revision 6e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981
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" 19e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar#include "llvm/ADT/StringRef.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; 471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 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': 57204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_nonstandard_escape) << "e"; 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 27; 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 603c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman case 'E': 613c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman PP.Diag(Loc, diag::ext_nonstandard_escape) << "E"; 623c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman ResultChar = 27; 633c54801fbc67d8df2fed0711a2e2022db6b1bbcfEli Friedman break; 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'f': 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 12; 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'n': 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 10; 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'r': 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 13; 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 't': 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 9; 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'v': 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 11; 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'x': { // Hex escape. 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::err_hex_escape_no_digits); 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = 1; 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Hex escapes are a maximal series of hex digits. 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Overflow = false; 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; ThisTokBuf != ThisTokEnd; ++ThisTokBuf) { 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer int CharVal = HexDigitValue(ThisTokBuf[0]); 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharVal == -1) break; 92c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // About to shift out a digit? 93c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner Overflow |= (ResultChar & 0xF0000000) ? true : false; 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 4; 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= CharVal; 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See if any bits will be truncated when evaluated as a character. 991a75ee270941dd8b5c7fdd23dffb5e81a0fd7290Alisdair Meredith unsigned CharWidth = IsWide 1001a75ee270941dd8b5c7fdd23dffb5e81a0fd7290Alisdair Meredith ? PP.getTargetInfo().getWCharWidth() 1011a75ee270941dd8b5c7fdd23dffb5e81a0fd7290Alisdair Meredith : PP.getTargetInfo().getCharWidth(); 1021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Overflow = true; 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Overflow) // Too many digits to fit in 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_hex_escape_too_large); 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '0': case '1': case '2': case '3': 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '4': case '5': case '6': case '7': { 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes. 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --ThisTokBuf; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes are a series of octal digits with maximum length 3. 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // "\0123" is a two digit sequence equal to "\012" "3". 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumDigits = 0; 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 3; 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= *ThisTokBuf++ - '0'; 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumDigits; 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && NumDigits < 3 && 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisTokBuf[0] >= '0' && ThisTokBuf[0] <= '7'); 1281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. Reject '\777', but not L'\777'. 1301a75ee270941dd8b5c7fdd23dffb5e81a0fd7290Alisdair Meredith unsigned CharWidth = IsWide 1311a75ee270941dd8b5c7fdd23dffb5e81a0fd7290Alisdair Meredith ? PP.getTargetInfo().getWCharWidth() 1321a75ee270941dd8b5c7fdd23dffb5e81a0fd7290Alisdair Meredith : PP.getTargetInfo().getCharWidth(); 1331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_octal_escape_too_large); 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, these are not valid escapes. 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '(': case '{': case '[': case '%': 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // GCC accepts these as extensions. We warn about them as such though. 144f01fdff97b245caac98100d232c760b4d0531411Eli Friedman PP.Diag(Loc, diag::ext_nonstandard_escape) 145f01fdff97b245caac98100d232c760b4d0531411Eli Friedman << std::string()+(char)ResultChar; 146f01fdff97b245caac98100d232c760b4d0531411Eli Friedman break; 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 148ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner if (isgraph(ThisTokBuf[0])) 149204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_unknown_escape) << std::string()+(char)ResultChar; 150ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner else 151204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_unknown_escape) << "x"+llvm::utohexstr(ResultChar); 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ResultChar; 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1580e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// ProcessUCNEscape - Read the Universal Character Name, check constraints and 1590e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// convert the UTF32 to UTF8. This is a subroutine of StringLiteralParser. 1600e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// When we decide to implement UCN's for character constants and identifiers, 1610e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// we will likely rework our support for UCN's. 1621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void ProcessUCNEscape(const char *&ThisTokBuf, const char *ThisTokEnd, 1631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump char *&ResultBuf, bool &HadError, 1641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SourceLocation Loc, bool IsWide, Preprocessor &PP) 1658a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff{ 1660e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // FIXME: Add a warning - UCN's are only valid in C++ & C99. 1678a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff // FIXME: Handle wide strings. 1681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1694e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Save the beginning of the string (for error diagnostics). 1704e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff const char *ThisTokBegin = ThisTokBuf; 1711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1720e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Skip the '\u' char's. 1730e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ThisTokBuf += 2; 1740e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 1750e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 1760e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff PP.Diag(Loc, diag::err_ucn_escape_no_digits); 1770e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff HadError = 1; 1780e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 1790e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 1804e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff typedef uint32_t UTF32; 1811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1820e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UTF32 UcnVal = 0; 1830e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff unsigned short UcnLen = (ThisTokBuf[-1] == 'u' ? 4 : 8); 1840e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff for (; ThisTokBuf != ThisTokEnd && UcnLen; ++ThisTokBuf, UcnLen--) { 1850e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff int CharVal = HexDigitValue(ThisTokBuf[0]); 1860e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (CharVal == -1) break; 1870e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal <<= 4; 1880e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal |= CharVal; 1890e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 1900e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // If we didn't consume the proper number of digits, there is a problem. 1910e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (UcnLen) { 1924e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff PP.Diag(PP.AdvanceToTokenCharacter(Loc, ThisTokBuf-ThisTokBegin), 1934e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff diag::err_ucn_escape_incomplete); 1940e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff HadError = 1; 1950e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 1960e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 1971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Check UCN constraints (C99 6.4.3p2). 1980e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if ((UcnVal < 0xa0 && 1990e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff (UcnVal != 0x24 && UcnVal != 0x40 && UcnVal != 0x60 )) // $, @, ` 2001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump || (UcnVal >= 0xD800 && UcnVal <= 0xDFFF) 2018a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff || (UcnVal > 0x10FFFF)) /* the maximum legal UTF32 value */ { 2020e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff PP.Diag(Loc, diag::err_ucn_escape_invalid); 2030e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff HadError = 1; 2040e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 2050e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 2060e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Now that we've parsed/checked the UCN, we convert from UTF32->UTF8. 2070e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // The conversion below was inspired by: 2080e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.c 2091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // First, we determine how many bytes the result will require. 2104e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff typedef uint8_t UTF8; 2110e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 2120e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff unsigned short bytesToWrite = 0; 2130e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (UcnVal < (UTF32)0x80) 2140e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 1; 2150e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x800) 2160e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 2; 2170e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x10000) 2180e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 3; 2190e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else 2200e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 4; 2211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2220e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMask = 0xBF; 2230e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMark = 0x80; 2241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2250e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Once the bits are split out into bytes of UTF8, this is a mask OR-ed 2268a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff // into the first byte, depending on how many bytes follow. 2271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump static const UTF8 firstByteMark[5] = { 2288a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff 0x00, 0x00, 0xC0, 0xE0, 0xF0 2290e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff }; 2300e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Finally, we write the bytes into ResultBuf. 2310e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 2320e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff switch (bytesToWrite) { // note: everything falls through. 2330e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 4: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 2340e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 3: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 2350e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 2: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 2360e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 1: *--ResultBuf = (UTF8) (UcnVal | firstByteMark[bytesToWrite]); 2370e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 2380e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Update the buffer. 2390e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 2400e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff} 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-constant: [C99 6.4.4.1] 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant integer-suffix 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant integer-suffix 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant integer-suffix 2471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// decimal-constant: 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant digit 2501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// octal-constant: 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant octal-digit 2531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// hexadecimal-constant: 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix hexadecimal-digit 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant hexadecimal-digit 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix: one of 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0x 0X 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-suffix: 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-suffix] 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-long-suffix] 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix [unsigned-suffix] 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix [unsigned-sufix] 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit: 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1 2 3 4 5 6 7 8 9 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit: 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-digit: 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 8 9 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a b c d e f 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// A B C D E F 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix: one of 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// u U 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix: one of 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// l L 2751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// long-long-suffix: one of 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ll LL 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// floating-constant: [C99 6.4.4.2] 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// TODO: add rules... 2805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser:: 2825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser(const char *begin, const char *end, 2835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation TokLoc, Preprocessor &pp) 2845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), ThisTokBegin(begin), ThisTokEnd(end) { 2851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 286c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // This routine assumes that the range begin/end matches the regex for integer 287c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // and FP constants (specifically, the 'pp-number' regex), and assumes that 288c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // the byte at "*end" is both valid and not part of the regex. Because of 289c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // this, it doesn't have to check for 'overscan' in various places. 290c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner assert(!isalnum(*end) && *end != '.' && *end != '_' && 291c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner "Lexer didn't maximally munch?"); 2921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin = begin; 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = false; 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = false; 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = false; 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isUnsigned = false; 2985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLongLong = false; 2996e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = false; 300506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = false; 301b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = false; 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 3031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '0') { // parse radix 305368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ParseNumberStartingWithZero(TokLoc); 306368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (hadError) 307368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { // the first digit is non-zero 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 313016765e3453db2e302efe53905e99cdb25501234Christopher Lamb } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) { 314ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 315ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_decimal_digit) << std::string(s, s+1); 316ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 3221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 3234411f46050216a139ab2fc7ff145ec384d11ec7fChris Lattner if ((*s == 'e' || *s == 'E')) { // exponent 32470f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 3255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 3290b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 3310b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 332ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-begin), 333ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 334ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 3350b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 3365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SuffixBegin = s; 3411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 342506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Parse the suffix. At this point we can classify whether we have an FP or 343506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // integer constant. 344506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner bool isFPConstant = isFloatingLiteral(); 3451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 346506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Loop over all of the characters of the suffix. If we see something bad, 347506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // we break out of the loop. 348506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner for (; s != ThisTokEnd; ++s) { 349506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner switch (*s) { 350506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'f': // FP Suffix for "float" 351506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'F': 352506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (!isFPConstant) break; // Error for integer constant. 3536e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat || isLong) break; // FF, LF invalid. 3546e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = true; 355506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 356506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'u': 357506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'U': 358506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // Error for floating constant. 359506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isUnsigned) break; // Cannot be repeated. 360506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isUnsigned = true; 361506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 362506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'l': 363506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'L': 364506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isLong || isLongLong) break; // Cannot be repeated. 3656e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat) break; // LF invalid. 3661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 367506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Check for long long. The L's need to be adjacent and the same case. 368506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s+1 != ThisTokEnd && s[1] == s[0]) { 369506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // long long invalid for floats. 370506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isLongLong = true; 371506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner ++s; // Eat both of them. 372506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } else { 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = true; 3745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 375506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 376506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'i': 3770c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (PP.getLangOptions().Microsoft) { 3786e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (isFPConstant || isUnsigned || isLong || isLongLong) break; 3796e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes 3800c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // Allow i8, i16, i32, i64, and i128. 381b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump if (s + 1 != ThisTokEnd) { 382b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump switch (s[1]) { 383b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '8': 384b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump s += 2; // i8 suffix 385b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = true; 3866e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 387b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '1': 3886e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 3896e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s[2] == '6') s += 3; // i16 suffix 3906e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes else if (s[2] == '2') { 3916e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 3 == ThisTokEnd) break; 3926e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s[3] == '8') s += 4; // i128 suffix 393b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump } 394b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = true; 3956e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 396b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '3': 3976e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 3986e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s[2] == '2') s += 3; // i32 suffix 399b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = true; 4006e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 401b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump case '6': 4026e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s + 2 == ThisTokEnd) break; 4036e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes if (s[2] == '4') s += 3; // i64 suffix 404b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump isMicrosoftInteger = true; 4056e8c7acb61b2c7f421d6e1aba8a7a84e96ab6981Nuno Lopes break; 406b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump default: 407b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump break; 408b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump } 409b79fe2d28777652a4df4f49dc876cbec060ca90eMike Stump break; 4100c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 4110c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 4120c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // fall through. 413506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'I': 414506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'j': 415506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'J': 416506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isImaginary) break; // Cannot be repeated. 417506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 418506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner diag::ext_imaginary_constant); 419506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = true; 420506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 4215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 422506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // If we reached here, there was an error. 423506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner break; 424506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } 4251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 426506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Report an error if there are any. 427506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s != ThisTokEnd) { 428ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 429ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner isFPConstant ? diag::err_invalid_suffix_float_constant : 430ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_suffix_integer_constant) 431ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner << std::string(SuffixBegin, ThisTokEnd); 432ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 433506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner return; 4345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 437368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// ParseNumberStartingWithZero - This method is called when the first character 438368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// of the number is found to be a zero. This means it is either an octal 439368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// number (like '04') or a hex number ('0x123a') a binary number ('0b1010') or 4401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// a floating point number (01239.123e4). Eat the prefix, determining the 441368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// radix etc. 442368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattnervoid NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) { 443368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner assert(s[0] == '0' && "Invalid method call"); 444368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 4451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 446368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle a hex number like 0x1234. 447368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if ((*s == 'x' || *s == 'X') && (isxdigit(s[1]) || s[1] == '.')) { 448368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 449368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 16; 450368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 451368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 452368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 453368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 454368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (*s == '.') { 455368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 456368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 457368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 458368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 459368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // A binary exponent can appear with or with a '.'. If dotted, the 4601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // binary exponent is required. 4616ea623823f8532670480425b573f35115404b4a0Chris Lattner if (*s == 'p' || *s == 'P') { 462368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 463368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 464368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 465368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 466368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 4676ea623823f8532670480425b573f35115404b4a0Chris Lattner if (first_non_digit == s) { 468ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 469ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 470ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 4716ea623823f8532670480425b573f35115404b4a0Chris Lattner return; 472368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 4736ea623823f8532670480425b573f35115404b4a0Chris Lattner s = first_non_digit; 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4754984212fced6d9c6538ebb7319839105e3880b45Chris Lattner if (!PP.getLangOptions().HexFloats) 476ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(TokLoc, diag::ext_hexconstant_invalid); 477368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (saw_period) { 478ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 479ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_hexconstant_requires_exponent); 480ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 481368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 482368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 483368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 4841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 485368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle simple binary numbers 0b01010 486368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'b' || *s == 'B') { 487368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // 0b101010 is a GCC extension. 488413d355e38755a71f106dbc0ac900ca989070916Chris Lattner PP.Diag(TokLoc, diag::ext_binary_literal); 489368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ++s; 490368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 2; 491368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 492368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipBinaryDigits(s); 493368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 494368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 495368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (isxdigit(*s)) { 496ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 497ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_binary_digit) << std::string(s, s+1); 498ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 499368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 500413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // Other suffixes will be diagnosed by the caller. 501368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 502368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 504368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // For now, the radix is set to 8. If we discover that we have a 505368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // floating point constant, the radix will change to 10. Octal floating 5061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // point constants are not permitted (only decimal and hexadecimal). 507368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 8; 508368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 509368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipOctalDigits(s); 510368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) 511368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; // Done, simple octal number like 01234 5121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 513413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have some other non-octal digit that *is* a decimal digit, see if 514413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // this is part of a floating point number like 094.123 or 09e1. 515413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (isdigit(*s)) { 516413d355e38755a71f106dbc0ac900ca989070916Chris Lattner const char *EndDecimal = SkipDigits(s); 517413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (EndDecimal[0] == '.' || EndDecimal[0] == 'e' || EndDecimal[0] == 'E') { 518413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = EndDecimal; 519413d355e38755a71f106dbc0ac900ca989070916Chris Lattner radix = 10; 520413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 521413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 523413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have a hex digit other than 'e' (which denotes a FP exponent) then 524413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // the code is using an incorrect base. 525368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (isxdigit(*s) && *s != 'e' && *s != 'E') { 526ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 527ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_octal_digit) << std::string(s, s+1); 528ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 529368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 530368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 5311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 532368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '.') { 533368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 534368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 535368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 536413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = SkipDigits(s); // Skip suffix. 537368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 538368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'e' || *s == 'E') { // exponent 539368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 540368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 541368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 542368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 543368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 544368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 545368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (first_non_digit != s) { 546368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = first_non_digit; 547368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else { 5481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 549ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 550ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 551368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 552368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 553368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 554368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner} 555368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 556368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// GetIntegerValue - Convert this numeric literal value to an APInt that 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// matches Val's input width. If there is an overflow, set Val to the low bits 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// of the result and return true. Otherwise, return false. 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool NumericLiteralParser::GetIntegerValue(llvm::APInt &Val) { 561a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // Fast path: Compute a conservative bound on the maximum number of 562a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // bits per digit in this radix. If we can't possibly overflow a 563a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // uint64 based on that bound then do the simple conversion to 564a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // integer. This avoids the expensive overflow checking below, and 565a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // handles the common cases that matter (small decimal integers and 566a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // hex/octal values which don't overflow). 567a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar unsigned MaxBitsPerDigit = 1; 5681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump while ((1U << MaxBitsPerDigit) < radix) 569a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar MaxBitsPerDigit += 1; 570a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar if ((SuffixBegin - DigitsBegin) * MaxBitsPerDigit <= 64) { 571a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar uint64_t N = 0; 572a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar for (s = DigitsBegin; s != SuffixBegin; ++s) 573a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar N = N*radix + HexDigitValue(*s); 574a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 575a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // This will truncate the value to Val's input width. Simply check 576a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // for overflow by comparing. 577a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar Val = N; 578a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar return Val.getZExtValue() != N; 579a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar } 580a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val = 0; 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin; 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt RadixVal(Val.getBitWidth(), radix); 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt CharVal(Val.getBitWidth(), 0); 5865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt OldVal = Val; 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool OverflowOccurred = false; 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (s < SuffixBegin) { 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned C = HexDigitValue(*s++); 5911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this letter is out of bound for this radix, reject it. 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(C < radix && "NumericLiteralParser ctor should have rejected this"); 5941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CharVal = C; 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add the digit to the value in the appropriate radix. If adding in digits 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // made the value smaller, then this overflowed. 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OldVal = Val; 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Multiply by radix, did overflow occur on the multiply? 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val *= RadixVal; 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.udiv(RadixVal) != OldVal; 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add value, did overflow occur on the value? 606d70cb645702bdbb42aee58403306a7c47e0d901cDaniel Dunbar // (a + b) ult b <=> overflow 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val += CharVal; 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.ult(CharVal); 6095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return OverflowOccurred; 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 613525a05093a4816af961fe2bc6b8a81c17e2e26c2Chris Lattnerllvm::APFloat NumericLiteralParser:: 614427d5af5b601985093b6b4b33ba1e30fc24d86dcTed KremenekGetFloatValue(const llvm::fltSemantics &Format, bool* isExact) { 615427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek using llvm::APFloat; 616e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar using llvm::StringRef; 6171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 61832e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek llvm::SmallVector<char,256> floatChars; 619e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar unsigned n = std::min(SuffixBegin - ThisTokBegin, ThisTokEnd - ThisTokBegin); 620e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar for (unsigned i = 0; i != n; ++i) 62132e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back(ThisTokBegin[i]); 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 62332e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back('\0'); 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 625427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat V (Format, APFloat::fcZero, false); 626427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat::opStatus status; 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 628e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar status = V.convertFromString(StringRef(&floatChars[0], n), 629e9f195f15ffe96d0a220c872ab12d0630a633c44Erick Tryzelaar APFloat::rmNearestTiesToEven); 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 631427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek if (isExact) 632427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek *isExact = status == APFloat::opOK; 6331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 634427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek return V; 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCharLiteralParser::CharLiteralParser(const char *begin, const char *end, 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation Loc, Preprocessor &PP) { 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // At this point we know that the character matches the regex "L?'.*'". 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = false; 6421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Determine if this is a wide character. 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IsWide = begin[0] == 'L'; 6455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) ++begin; 6461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over the entry quote. 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(begin[0] == '\'' && "Invalid token lexed"); 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++begin; 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // FIXME: The "Value" is an uint64_t so we can handle char literals of 6524bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // upto 64-bits. 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This extensively assumes that 'char' is 8-bits. 65498be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getCharWidth() == 8 && 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes char is 8 bits"); 656e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner assert(PP.getTargetInfo().getIntWidth() <= 64 && 657e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner (PP.getTargetInfo().getIntWidth() & 7) == 0 && 658e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner "Assumes sizeof(int) on target is <= 64 and a multiple of char"); 659e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner assert(PP.getTargetInfo().getWCharWidth() <= 64 && 660e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner "Assumes sizeof(wchar) on target is <= 64"); 6614bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 6621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // This is what we will use for overflow detection 6634bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta llvm::APInt LitVal(PP.getTargetInfo().getIntWidth(), 0); 6641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 665e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner unsigned NumCharsSoFar = 0; 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (begin[0] != '\'') { 6674bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta uint64_t ResultChar; 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (begin[0] != '\\') // If this is a normal character, consume it. 6695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = *begin++; 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else // Otherwise, this is an escape character. 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = ProcessCharEscape(begin, end, HadError, Loc, IsWide, PP); 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a multi-character constant (e.g. 'abc'), handle it. These are 6745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // implementation defined (C99 6.4.4.4p10). 675e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (NumCharsSoFar) { 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) { 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Emulate GCC's (unintentional?) behavior: L'ab' -> L'b'. 6784bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal = 0; 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Narrow character literals act as though their value is concatenated 681e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // in this implementation, but warn on overflow. 682e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (LitVal.countLeadingZeros() < 8) 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_char_constant_too_large); 6844bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal <<= 8; 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6884bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal = LitVal + ResultChar; 689e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner ++NumCharsSoFar; 690e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner } 691e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner 692e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // If this is the second character being processed, do special handling. 693e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (NumCharsSoFar > 1) { 694e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // Warn about discarding the top bits for multi-char wide-character 695e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner // constants (L'abcd'). 696e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (IsWide) 697e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner PP.Diag(Loc, diag::warn_extraneous_wide_char_constant); 698e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner else if (NumCharsSoFar != 4) 699e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner PP.Diag(Loc, diag::ext_multichar_character_literal); 700e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner else 701e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner PP.Diag(Loc, diag::ext_four_char_character_literal); 7022a1c363f38e59a5044fc349aa7e538a50954c244Eli Friedman IsMultiChar = true; 703930b71a4a7dedf70a73e5fd875bae7df452b80a9Daniel Dunbar } else 704930b71a4a7dedf70a73e5fd875bae7df452b80a9Daniel Dunbar IsMultiChar = false; 7054bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 7064bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // Transfer the value from APInt to uint64_t 7074bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta Value = LitVal.getZExtValue(); 7081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a single narrow character, sign extend it (e.g. '\xFF' is "-1") 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if 'char' is signed for this target (C99 6.4.4.4p10). Note that multiple 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // character constants are not sign extended in the this implementation: 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // '\xFF\xFF' = 65536 and '\x0\xFF' = 255, which matches GCC. 713e3ad881e4e9620e941dabd4e78dacdb028b85682Chris Lattner if (!IsWide && NumCharsSoFar == 1 && (Value & 128) && 71415b91764d08e886391c865c4a444d7b51141c284Eli Friedman PP.getLangOptions().CharIsSigned) 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = (signed char)Value; 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal: [C99 6.4.5] 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// " [s-char-sequence] " 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// L" [s-char-sequence] " 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence: 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char 7245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence s-char 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char: 7265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// any source character except the double quote ", 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// backslash \, or newline character 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 7305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character: [C99 6.4.4.4] 7315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ escape-code 7325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 7335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-code: 7345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code 7355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code 7375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code: one of 7385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// n t b r f v a 7395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ ' " ? 7405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code: 7415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit 7425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit 7435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit octal-digit 7445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code: 7455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// x hex-digit 7465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code hex-digit 7475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name: 7485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \u hex-quad 7495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \U hex-quad hex-quad 7505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-quad: 7515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-digit hex-digit hex-digit hex-digit 7525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteralParser:: 754d217773f106856a11879ec79dc468efefaf2ee75Chris LattnerStringLiteralParser(const Token *StringToks, unsigned NumStringToks, 755bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner Preprocessor &pp) : PP(pp) { 7565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan all of the string portions, remember the max individual token length, 7575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // computing a bound on the concatenated string length, and see whether any 7585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // piece is a wide-string. If any of the string portions is a wide-string 7595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // literal, the result is a wide-string literal [C99 6.4.5p4]. 7605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[0].getLength(); 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound = StringToks[0].getLength()-2; // -2 for "". 76222f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide = StringToks[0].is(tok::wide_string_literal); 7631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Implement Translation Phase #6: concatenation of string literals 7675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// (C99 5.1.1.2p1). The common case is only one string fragment. 7685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1; i != NumStringToks; ++i) { 7695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The string could be shorter than this if it needs cleaning, but this is a 7705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reasonable bound, which is all we need. 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound += StringToks[i].getLength()-2; // -2 for "". 7721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember maximum string piece length. 7741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (StringToks[i].getLength() > MaxTokenLength) 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[i].getLength(); 7761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember if we see any wide strings. 77822f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide |= StringToks[i].is(tok::wide_string_literal); 7795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 780dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 7815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Include space for the null terminator. 7825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++SizeBound; 7831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R warning: "traditional C rejects string constant concatenation" 7851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the width in bytes of wchar_t. If no wchar_t strings are used, do not 7875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // query the target. As such, wchar_tByteWidth is only valid if AnyWide=true. 7885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth = ~0U; 7895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 790bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner wchar_tByteWidth = PP.getTargetInfo().getWCharWidth(); 7915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert((wchar_tByteWidth & 7) == 0 && "Assumes wchar_t is byte multiple!"); 7925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth /= 8; 7935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The output buffer size needs to be large enough to hold wide characters. 7965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This is a worst-case assumption which basically corresponds to L"" "long". 7975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) 7985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound *= wchar_tByteWidth; 7991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Size the temporary buffer to hold the result string data. 8015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultBuf.resize(SizeBound); 8021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Likewise, but for each string piece. 8045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallString<512> TokenBuf; 8055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TokenBuf.resize(MaxTokenLength); 8061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Loop over all the strings, getting their spelling, and expanding them to 8085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // wide strings as appropriate. 8095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr = &ResultBuf[0]; // Next byte to fill in. 8101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 811ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = false; 8121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = NumStringToks; i != e; ++i) { 8145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokBuf = &TokenBuf[0]; 8155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the spelling of the token, which eliminates trigraphs, etc. We know 8165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that ThisTokBuf points to a buffer that is big enough for the whole token 8175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and 'spelled' tokens can only shrink. 8185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ThisTokLen = PP.getSpelling(StringToks[i], ThisTokBuf); 8195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd = ThisTokBuf+ThisTokLen-1; // Skip end quote. 8201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Input character set mapping support. 8221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip L marker for wide strings. 8245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool ThisIsWide = false; 8255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] == 'L') { 8265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 8275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisIsWide = true; 8285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(ThisTokBuf[0] == '"' && "Expected quote, lexer broken?"); 8315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 8321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 833ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Check if this is a pascal string 834ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (pp.getLangOptions().PascalStrings && ThisTokBuf + 1 != ThisTokEnd && 835ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf[0] == '\\' && ThisTokBuf[1] == 'p') { 8361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 837ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // If the \p sequence is found in the first token, we have a pascal string 838ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Otherwise, if we already have a pascal string, ignore the first \p 839ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (i == 0) { 840ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ++ThisTokBuf; 841ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = true; 842ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } else if (Pascal) 843ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf += 2; 844ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } 8451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (ThisTokBuf != ThisTokEnd) { 8475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Is this a span of non-escape characters? 8485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] != '\\') { 8495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *InStart = ThisTokBuf; 8505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 8515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 8525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && ThisTokBuf[0] != '\\'); 8531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Copy the character span over. 8555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned Len = ThisTokBuf-InStart; 8565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!AnyWide) { 8575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer memcpy(ResultPtr, InStart, Len); 8585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr += Len; 8595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 8605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Note: our internal rep of wide char tokens is always little-endian. 8615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; Len; --Len, ++InStart) { 8625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = InStart[0]; 8635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add zeros at the end. 8645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 8650e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff *ResultPtr++ = 0; 8665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 8695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8704e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Is this a Universal Character Name escape? 8710e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (ThisTokBuf[1] == 'u' || ThisTokBuf[1] == 'U') { 8721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ProcessUCNEscape(ThisTokBuf, ThisTokEnd, ResultPtr, 8738a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff hadError, StringToks[i].getLocation(), ThisIsWide, PP); 8744e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff continue; 8754e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff } 8764e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Otherwise, this is a non-UCN escape character. Process it. 8774e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff unsigned ResultChar = ProcessCharEscape(ThisTokBuf, ThisTokEnd, hadError, 8784e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff StringToks[i].getLocation(), 8794e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff ThisIsWide, PP); 8801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8814e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Note: our internal rep of wide char tokens is always little-endian. 8824e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff *ResultPtr++ = ResultChar & 0xFF; 8831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8844e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff if (AnyWide) { 8854e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 8864e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff *ResultPtr++ = ResultChar >> i*8; 8875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 891bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner if (Pascal) { 892ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ResultBuf[0] = ResultPtr-&ResultBuf[0]-1; 893bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner 894bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner // Verify that pascal strings aren't too large. 89557d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman if (GetStringLength() > 256) { 896bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner PP.Diag(StringToks[0].getLocation(), diag::err_pascal_string_too_long) 897bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner << SourceRange(StringToks[0].getLocation(), 898bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner StringToks[NumStringToks-1].getLocation()); 89957d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman hadError = 1; 90057d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman return; 90157d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman } 902bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner } 9035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 904719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 905719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 906719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// getOffsetOfStringByte - This function returns the offset of the 907719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// specified byte of the string data represented by Token. This handles 908719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// advancing over escape sequences in the string. 909719e61573f27c11057ecfe0dd8f141621602c571Chris Lattnerunsigned StringLiteralParser::getOffsetOfStringByte(const Token &Tok, 910719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner unsigned ByteNo, 911719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner Preprocessor &PP) { 912719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Get the spelling of the token. 913719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner llvm::SmallString<16> SpellingBuffer; 914719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner SpellingBuffer.resize(Tok.getLength()); 9151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 916719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingPtr = &SpellingBuffer[0]; 917719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner unsigned TokLen = PP.getSpelling(Tok, SpellingPtr); 918719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 919719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr[0] != 'L' && "Doesn't handle wide strings yet"); 920719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 9211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 922719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingStart = SpellingPtr; 923719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingEnd = SpellingPtr+TokLen; 924719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 925719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Skip over the leading quote. 926719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr[0] == '"' && "Should be a string literal!"); 927719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 9281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 929719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Skip over bytes until we find the offset we're looking for. 930719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner while (ByteNo) { 931719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr < SpellingEnd && "Didn't find byte offset!"); 9321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 933719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Step over non-escapes simply. 934719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner if (*SpellingPtr != '\\') { 935719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 936719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner --ByteNo; 937719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner continue; 938719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 9391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 940719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Otherwise, this is an escape character. Advance over it. 941719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner bool HadError = false; 942719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ProcessCharEscape(SpellingPtr, SpellingEnd, HadError, 943719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner Tok.getLocation(), false, PP); 944719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(!HadError && "This method isn't valid on erroneous strings"); 945719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner --ByteNo; 946719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 9471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 948719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner return SpellingPtr-SpellingStart; 949719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner} 950