LiteralSupport.cpp revision f01fdff97b245caac98100d232c760b4d0531411
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- LiteralSupport.cpp - Code to parse and process literals ----------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the NumericLiteralParser, CharLiteralParser, and 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// StringLiteralParser interfaces. 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/LiteralSupport.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Preprocessor.h" 17500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/Lex/LexDiagnostic.h" 18136f93a2b660fc780fc2dba82a6f42ca4dc9164aChris Lattner#include "clang/Basic/TargetInfo.h" 195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "llvm/ADT/StringExtras.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// HexDigitValue - Return the value of the specified hex digit, or -1 if it's 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// not valid. 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstatic int HexDigitValue(char C) { 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= '0' && C <= '9') return C-'0'; 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= 'a' && C <= 'f') return C-'a'+10; 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (C >= 'A' && C <= 'F') return C-'A'+10; 285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return -1; 295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ProcessCharEscape - Parse a standard C escape sequence, which can occur in 325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// either a character or a string literal. 335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerstatic unsigned ProcessCharEscape(const char *&ThisTokBuf, 345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd, bool &HadError, 355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation Loc, bool IsWide, 365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Preprocessor &PP) { 375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip the '\' char. 385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // We know that this character can't be off the end of the buffer, because 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that would have been \", which would not have been the end of string. 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar = *ThisTokBuf++; 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (ResultChar) { 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These map to themselves. 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '\\': case '\'': case '"': case '?': break; 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // These have fixed mappings. 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'a': 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R: the meaning of '\\a' is different in traditional C 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 7; 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'b': 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 8; 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'e': 56204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_nonstandard_escape) << "e"; 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 27; 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'f': 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 12; 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'n': 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 10; 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'r': 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 13; 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 't': 695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 9; 705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'v': 725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 11; 735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'x': { // Hex escape. 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::err_hex_escape_no_digits); 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = 1; 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Hex escapes are a maximal series of hex digits. 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Overflow = false; 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; ThisTokBuf != ThisTokEnd; ++ThisTokBuf) { 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer int CharVal = HexDigitValue(ThisTokBuf[0]); 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharVal == -1) break; 87c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // About to shift out a digit? 88c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner Overflow |= (ResultChar & 0xF0000000) ? true : false; 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 4; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= CharVal; 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See if any bits will be truncated when evaluated as a character. 9498be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharWidth = PP.getTargetInfo().getCharWidth(IsWide); 959c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek 965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Overflow = true; 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Overflow) // Too many digits to fit in 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_hex_escape_too_large); 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '0': case '1': case '2': case '3': 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '4': case '5': case '6': case '7': { 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes. 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --ThisTokBuf; 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes are a series of octal digits with maximum length 3. 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // "\0123" is a two digit sequence equal to "\012" "3". 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumDigits = 0; 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 3; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= *ThisTokBuf++ - '0'; 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumDigits; 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && NumDigits < 3 && 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisTokBuf[0] >= '0' && ThisTokBuf[0] <= '7'); 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. Reject '\777', but not L'\777'. 12398be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharWidth = PP.getTargetInfo().getCharWidth(IsWide); 1249c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 1265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_octal_escape_too_large); 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, these are not valid escapes. 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '(': case '{': case '[': case '%': 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // GCC accepts these as extensions. We warn about them as such though. 135f01fdff97b245caac98100d232c760b4d0531411Eli Friedman PP.Diag(Loc, diag::ext_nonstandard_escape) 136f01fdff97b245caac98100d232c760b4d0531411Eli Friedman << std::string()+(char)ResultChar; 137f01fdff97b245caac98100d232c760b4d0531411Eli Friedman break; 1385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 140ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner if (isgraph(ThisTokBuf[0])) 141204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_unknown_escape) << std::string()+(char)ResultChar; 142ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner else 143204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_unknown_escape) << "x"+llvm::utohexstr(ResultChar); 1445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ResultChar; 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1500e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// ProcessUCNEscape - Read the Universal Character Name, check constraints and 1510e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// convert the UTF32 to UTF8. This is a subroutine of StringLiteralParser. 1520e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// When we decide to implement UCN's for character constants and identifiers, 1530e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff/// we will likely rework our support for UCN's. 1540e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroffstatic void ProcessUCNEscape(const char *&ThisTokBuf, const char *ThisTokEnd, 1558a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff char *&ResultBuf, bool &HadError, 1568a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff SourceLocation Loc, bool IsWide, Preprocessor &PP) 1578a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff{ 1580e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // FIXME: Add a warning - UCN's are only valid in C++ & C99. 1598a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff // FIXME: Handle wide strings. 1600e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 1614e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Save the beginning of the string (for error diagnostics). 1624e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff const char *ThisTokBegin = ThisTokBuf; 1634e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff 1640e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Skip the '\u' char's. 1650e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ThisTokBuf += 2; 1660e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 1670e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 1680e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff PP.Diag(Loc, diag::err_ucn_escape_no_digits); 1690e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff HadError = 1; 1700e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 1710e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 1724e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff typedef uint32_t UTF32; 1730e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 1740e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UTF32 UcnVal = 0; 1750e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff unsigned short UcnLen = (ThisTokBuf[-1] == 'u' ? 4 : 8); 1760e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff for (; ThisTokBuf != ThisTokEnd && UcnLen; ++ThisTokBuf, UcnLen--) { 1770e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff int CharVal = HexDigitValue(ThisTokBuf[0]); 1780e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (CharVal == -1) break; 1790e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal <<= 4; 1800e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff UcnVal |= CharVal; 1810e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 1820e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // If we didn't consume the proper number of digits, there is a problem. 1830e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (UcnLen) { 1844e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff PP.Diag(PP.AdvanceToTokenCharacter(Loc, ThisTokBuf-ThisTokBegin), 1854e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff diag::err_ucn_escape_incomplete); 1860e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff HadError = 1; 1870e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 1880e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 1898a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff // Check UCN constraints (C99 6.4.3p2). 1900e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if ((UcnVal < 0xa0 && 1910e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff (UcnVal != 0x24 && UcnVal != 0x40 && UcnVal != 0x60 )) // $, @, ` 1928a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff || (UcnVal >= 0xD800 && UcnVal <= 0xDFFF) 1938a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff || (UcnVal > 0x10FFFF)) /* the maximum legal UTF32 value */ { 1940e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff PP.Diag(Loc, diag::err_ucn_escape_invalid); 1950e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff HadError = 1; 1960e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff return; 1970e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 1980e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Now that we've parsed/checked the UCN, we convert from UTF32->UTF8. 1990e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // The conversion below was inspired by: 2000e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.c 2010e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // First, we determine how many bytes the result will require. 2024e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff typedef uint8_t UTF8; 2030e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 2040e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff unsigned short bytesToWrite = 0; 2050e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (UcnVal < (UTF32)0x80) 2060e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 1; 2070e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x800) 2080e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 2; 2090e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else if (UcnVal < (UTF32)0x10000) 2100e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 3; 2110e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff else 2120e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff bytesToWrite = 4; 2130e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 2140e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMask = 0xBF; 2150e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff const unsigned byteMark = 0x80; 2160e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff 2170e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Once the bits are split out into bytes of UTF8, this is a mask OR-ed 2188a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff // into the first byte, depending on how many bytes follow. 2198a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff static const UTF8 firstByteMark[5] = { 2208a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff 0x00, 0x00, 0xC0, 0xE0, 0xF0 2210e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff }; 2220e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Finally, we write the bytes into ResultBuf. 2230e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 2240e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff switch (bytesToWrite) { // note: everything falls through. 2250e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 4: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 2260e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 3: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 2270e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 2: *--ResultBuf = (UTF8)((UcnVal | byteMark) & byteMask); UcnVal >>= 6; 2280e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff case 1: *--ResultBuf = (UTF8) (UcnVal | firstByteMark[bytesToWrite]); 2290e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff } 2300e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff // Update the buffer. 2310e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ResultBuf += bytesToWrite; 2320e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff} 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-constant: [C99 6.4.4.1] 2365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant integer-suffix 2375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant integer-suffix 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant integer-suffix 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant: 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant digit 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant: 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant octal-digit 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant: 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix hexadecimal-digit 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant hexadecimal-digit 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix: one of 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0x 0X 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-suffix: 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-suffix] 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-long-suffix] 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix [unsigned-suffix] 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix [unsigned-sufix] 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit: 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1 2 3 4 5 6 7 8 9 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit: 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-digit: 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 8 9 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a b c d e f 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// A B C D E F 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix: one of 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// u U 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix: one of 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// l L 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix: one of 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ll LL 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// floating-constant: [C99 6.4.4.2] 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// TODO: add rules... 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser:: 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser(const char *begin, const char *end, 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation TokLoc, Preprocessor &pp) 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), ThisTokBegin(begin), ThisTokEnd(end) { 277c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner 278c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // This routine assumes that the range begin/end matches the regex for integer 279c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // and FP constants (specifically, the 'pp-number' regex), and assumes that 280c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // the byte at "*end" is both valid and not part of the regex. Because of 281c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // this, it doesn't have to check for 'overscan' in various places. 282c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner assert(!isalnum(*end) && *end != '.' && *end != '_' && 283c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner "Lexer didn't maximally munch?"); 284c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin = begin; 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = false; 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = false; 2885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = false; 2895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isUnsigned = false; 2905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLongLong = false; 2916e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = false; 292506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = false; 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '0') { // parse radix 296368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ParseNumberStartingWithZero(TokLoc); 297368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (hadError) 298368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { // the first digit is non-zero 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 304016765e3453db2e302efe53905e99cdb25501234Christopher Lamb } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) { 305ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 306ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_decimal_digit) << std::string(s, s+1); 307ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 3105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 3115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 3125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 3135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3144411f46050216a139ab2fc7ff145ec384d11ec7fChris Lattner if ((*s == 'e' || *s == 'E')) { // exponent 31570f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 3165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 3175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 3185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 3195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 3200b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 3220b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 323ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-begin), 324ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 325ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 3260b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 3315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SuffixBegin = s; 332506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 333506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Parse the suffix. At this point we can classify whether we have an FP or 334506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // integer constant. 335506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner bool isFPConstant = isFloatingLiteral(); 336506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 337506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Loop over all of the characters of the suffix. If we see something bad, 338506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // we break out of the loop. 339506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner for (; s != ThisTokEnd; ++s) { 340506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner switch (*s) { 341506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'f': // FP Suffix for "float" 342506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'F': 343506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (!isFPConstant) break; // Error for integer constant. 3446e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat || isLong) break; // FF, LF invalid. 3456e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = true; 346506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 347506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'u': 348506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'U': 349506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // Error for floating constant. 350506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isUnsigned) break; // Cannot be repeated. 351506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isUnsigned = true; 352506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 353506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'l': 354506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'L': 355506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isLong || isLongLong) break; // Cannot be repeated. 3566e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat) break; // LF invalid. 357506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 358506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Check for long long. The L's need to be adjacent and the same case. 359506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s+1 != ThisTokEnd && s[1] == s[0]) { 360506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // long long invalid for floats. 361506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isLongLong = true; 362506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner ++s; // Eat both of them. 363506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } else { 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = true; 3655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 366506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 367506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'i': 3680c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (PP.getLangOptions().Microsoft) { 3690c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // Allow i8, i16, i32, i64, and i128. 3700c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3710c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff switch (*s) { 3720c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '8': 3730c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff s++; // i8 suffix 3740c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3750c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '1': 3760c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3770c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '6') s++; // i16 suffix 3780c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff else if (*s == '2') { 3790c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3800c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '8') s++; // i128 suffix 3810c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3820c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3830c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '3': 3840c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3850c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '2') s++; // i32 suffix 3860c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3870c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '6': 3880c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3890c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '4') s++; // i64 suffix 3900c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3910c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff default: 3920c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3930c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3940c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3950c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3960c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // fall through. 397506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'I': 398506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'j': 399506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'J': 400506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isImaginary) break; // Cannot be repeated. 401506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 402506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner diag::ext_imaginary_constant); 403506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = true; 404506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 4055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 406506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // If we reached here, there was an error. 407506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner break; 408506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } 409506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 410506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Report an error if there are any. 411506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s != ThisTokEnd) { 412ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 413ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner isFPConstant ? diag::err_invalid_suffix_float_constant : 414ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_suffix_integer_constant) 415ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner << std::string(SuffixBegin, ThisTokEnd); 416ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 417506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner return; 4185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 421368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// ParseNumberStartingWithZero - This method is called when the first character 422368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// of the number is found to be a zero. This means it is either an octal 423368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// number (like '04') or a hex number ('0x123a') a binary number ('0b1010') or 424368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// a floating point number (01239.123e4). Eat the prefix, determining the 425368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// radix etc. 426368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattnervoid NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) { 427368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner assert(s[0] == '0' && "Invalid method call"); 428368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 429368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 430368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle a hex number like 0x1234. 431368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if ((*s == 'x' || *s == 'X') && (isxdigit(s[1]) || s[1] == '.')) { 432368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 433368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 16; 434368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 435368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 436368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 437368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 438368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (*s == '.') { 439368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 440368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 441368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 442368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 443368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // A binary exponent can appear with or with a '.'. If dotted, the 444368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // binary exponent is required. 4456ea623823f8532670480425b573f35115404b4a0Chris Lattner if (*s == 'p' || *s == 'P') { 446368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 447368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 448368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 449368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 450368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 4516ea623823f8532670480425b573f35115404b4a0Chris Lattner if (first_non_digit == s) { 452ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 453ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 454ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 4556ea623823f8532670480425b573f35115404b4a0Chris Lattner return; 456368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 4576ea623823f8532670480425b573f35115404b4a0Chris Lattner s = first_non_digit; 4586ea623823f8532670480425b573f35115404b4a0Chris Lattner 4594984212fced6d9c6538ebb7319839105e3880b45Chris Lattner if (!PP.getLangOptions().HexFloats) 460ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(TokLoc, diag::ext_hexconstant_invalid); 461368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (saw_period) { 462ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 463ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_hexconstant_requires_exponent); 464ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 465368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 466368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 467368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 468368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 469368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle simple binary numbers 0b01010 470368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'b' || *s == 'B') { 471368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // 0b101010 is a GCC extension. 472413d355e38755a71f106dbc0ac900ca989070916Chris Lattner PP.Diag(TokLoc, diag::ext_binary_literal); 473368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ++s; 474368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 2; 475368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 476368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipBinaryDigits(s); 477368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 478368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 479368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (isxdigit(*s)) { 480ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 481ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_binary_digit) << std::string(s, s+1); 482ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 483368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 484413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // Other suffixes will be diagnosed by the caller. 485368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 486368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 487368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 488368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // For now, the radix is set to 8. If we discover that we have a 489368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // floating point constant, the radix will change to 10. Octal floating 490368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // point constants are not permitted (only decimal and hexadecimal). 491368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 8; 492368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 493368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipOctalDigits(s); 494368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) 495368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; // Done, simple octal number like 01234 496368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 497413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have some other non-octal digit that *is* a decimal digit, see if 498413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // this is part of a floating point number like 094.123 or 09e1. 499413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (isdigit(*s)) { 500413d355e38755a71f106dbc0ac900ca989070916Chris Lattner const char *EndDecimal = SkipDigits(s); 501413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (EndDecimal[0] == '.' || EndDecimal[0] == 'e' || EndDecimal[0] == 'E') { 502413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = EndDecimal; 503413d355e38755a71f106dbc0ac900ca989070916Chris Lattner radix = 10; 504413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 505413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 506413d355e38755a71f106dbc0ac900ca989070916Chris Lattner 507413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have a hex digit other than 'e' (which denotes a FP exponent) then 508413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // the code is using an incorrect base. 509368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (isxdigit(*s) && *s != 'e' && *s != 'E') { 510ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 511ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_octal_digit) << std::string(s, s+1); 512ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 513368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 514368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 515368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 516368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '.') { 517368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 518368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 519368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 520413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = SkipDigits(s); // Skip suffix. 521368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 522368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'e' || *s == 'E') { // exponent 523368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 524368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 525368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 526368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 527368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 528368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 529368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (first_non_digit != s) { 530368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = first_non_digit; 531368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else { 532ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 533ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 534ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 535368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 536368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 537368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 538368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner} 539368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 540368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 5415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// GetIntegerValue - Convert this numeric literal value to an APInt that 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// matches Val's input width. If there is an overflow, set Val to the low bits 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// of the result and return true. Otherwise, return false. 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool NumericLiteralParser::GetIntegerValue(llvm::APInt &Val) { 545a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // Fast path: Compute a conservative bound on the maximum number of 546a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // bits per digit in this radix. If we can't possibly overflow a 547a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // uint64 based on that bound then do the simple conversion to 548a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // integer. This avoids the expensive overflow checking below, and 549a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // handles the common cases that matter (small decimal integers and 550a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // hex/octal values which don't overflow). 551a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar unsigned MaxBitsPerDigit = 1; 552a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar while ((1U << MaxBitsPerDigit) < radix) 553a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar MaxBitsPerDigit += 1; 554a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar if ((SuffixBegin - DigitsBegin) * MaxBitsPerDigit <= 64) { 555a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar uint64_t N = 0; 556a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar for (s = DigitsBegin; s != SuffixBegin; ++s) 557a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar N = N*radix + HexDigitValue(*s); 558a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 559a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // This will truncate the value to Val's input width. Simply check 560a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // for overflow by comparing. 561a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar Val = N; 562a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar return Val.getZExtValue() != N; 563a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar } 564a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val = 0; 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin; 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt RadixVal(Val.getBitWidth(), radix); 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt CharVal(Val.getBitWidth(), 0); 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt OldVal = Val; 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool OverflowOccurred = false; 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (s < SuffixBegin) { 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned C = HexDigitValue(*s++); 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this letter is out of bound for this radix, reject it. 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(C < radix && "NumericLiteralParser ctor should have rejected this"); 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CharVal = C; 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add the digit to the value in the appropriate radix. If adding in digits 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // made the value smaller, then this overflowed. 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OldVal = Val; 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Multiply by radix, did overflow occur on the multiply? 5865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val *= RadixVal; 5875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.udiv(RadixVal) != OldVal; 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add value, did overflow occur on the value? 590d70cb645702bdbb42aee58403306a7c47e0d901cDaniel Dunbar // (a + b) ult b <=> overflow 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val += CharVal; 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.ult(CharVal); 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return OverflowOccurred; 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 597525a05093a4816af961fe2bc6b8a81c17e2e26c2Chris Lattnerllvm::APFloat NumericLiteralParser:: 598427d5af5b601985093b6b4b33ba1e30fc24d86dcTed KremenekGetFloatValue(const llvm::fltSemantics &Format, bool* isExact) { 599427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek using llvm::APFloat; 600427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 60132e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek llvm::SmallVector<char,256> floatChars; 60232e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek for (unsigned i = 0, n = ThisTokEnd-ThisTokBegin; i != n; ++i) 60332e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back(ThisTokBegin[i]); 60432e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 60532e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back('\0'); 60632e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 607427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat V (Format, APFloat::fcZero, false); 608427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat::opStatus status; 60932e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 61032e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek status = V.convertFromString(&floatChars[0],APFloat::rmNearestTiesToEven); 611427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 612427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek if (isExact) 613427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek *isExact = status == APFloat::opOK; 614427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 615427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek return V; 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCharLiteralParser::CharLiteralParser(const char *begin, const char *end, 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation Loc, Preprocessor &PP) { 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // At this point we know that the character matches the regex "L?'.*'". 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = false; 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Determine if this is a wide character. 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IsWide = begin[0] == 'L'; 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) ++begin; 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over the entry quote. 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(begin[0] == '\'' && "Invalid token lexed"); 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++begin; 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6324bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // FIXME: The "Value" is an uint64_t so we can handle char literals of 6334bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // upto 64-bits. 6344bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta assert(PP.getTargetInfo().getIntWidth() <= 64 && 6354bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta "Assumes sizeof(int) on target is <= 64"); 6364bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta assert(PP.getTargetInfo().getWCharWidth() <= 64 && 6374bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta "Assumes sizeof(wchar) on target is <= 64"); 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This extensively assumes that 'char' is 8-bits. 63998be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getCharWidth() == 8 && 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes char is 8 bits"); 6414bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 6424bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // This is what we will use for overflow detection 6434bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta llvm::APInt LitVal(PP.getTargetInfo().getIntWidth(), 0); 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstChar = true; 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isMultiChar = false; 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (begin[0] != '\'') { 6484bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta uint64_t ResultChar; 6495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (begin[0] != '\\') // If this is a normal character, consume it. 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = *begin++; 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else // Otherwise, this is an escape character. 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = ProcessCharEscape(begin, end, HadError, Loc, IsWide, PP); 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a multi-character constant (e.g. 'abc'), handle it. These are 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // implementation defined (C99 6.4.4.4p10). 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isFirstChar) { 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is the second character being processed, do special handling. 6585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isMultiChar) { 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isMultiChar = true; 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Warn about discarding the top bits for multi-char wide-character 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // constants (L'abcd'). 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_extraneous_wide_char_constant); 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) { 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Emulate GCC's (unintentional?) behavior: L'ab' -> L'b'. 6694bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal = 0; 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Narrow character literals act as though their value is concatenated 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // in this implementation. 6734bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta if ((LitVal.shl(8)).lshr(8) != LitVal) 6744bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // if (((LitVal << 8) >> 8) != LitVal) 6755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_char_constant_too_large); 6764bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal <<= 8; 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6804bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta LitVal = LitVal + ResultChar; 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstChar = false; 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6834bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta 6844bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta // Transfer the value from APInt to uint64_t 6854bc11af9bed1d4a247e3db1fcb754d410ad99099Sanjiv Gupta Value = LitVal.getZExtValue(); 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a single narrow character, sign extend it (e.g. '\xFF' is "-1") 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if 'char' is signed for this target (C99 6.4.4.4p10). Note that multiple 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // character constants are not sign extended in the this implementation: 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // '\xFF\xFF' = 65536 and '\x0\xFF' = 255, which matches GCC. 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!IsWide && !isMultiChar && (Value & 128) && 69298be4943e8dc4f3905629a7102668960873cf863Chris Lattner PP.getTargetInfo().isCharSigned()) 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = (signed char)Value; 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal: [C99 6.4.5] 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// " [s-char-sequence] " 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// L" [s-char-sequence] " 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence: 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence s-char 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char: 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// any source character except the double quote ", 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// backslash \, or newline character 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 7085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character: [C99 6.4.4.4] 7095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ escape-code 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-code: 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code: one of 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// n t b r f v a 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ ' " ? 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code: 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit octal-digit 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code: 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// x hex-digit 7245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code hex-digit 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name: 7265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \u hex-quad 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \U hex-quad hex-quad 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-quad: 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-digit hex-digit hex-digit hex-digit 7305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteralParser:: 732d217773f106856a11879ec79dc468efefaf2ee75Chris LattnerStringLiteralParser(const Token *StringToks, unsigned NumStringToks, 733bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner Preprocessor &pp) : PP(pp) { 7345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan all of the string portions, remember the max individual token length, 7355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // computing a bound on the concatenated string length, and see whether any 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // piece is a wide-string. If any of the string portions is a wide-string 7375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // literal, the result is a wide-string literal [C99 6.4.5p4]. 7385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[0].getLength(); 7395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound = StringToks[0].getLength()-2; // -2 for "". 74022f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide = StringToks[0].is(tok::wide_string_literal); 7415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 7435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Implement Translation Phase #6: concatenation of string literals 7455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// (C99 5.1.1.2p1). The common case is only one string fragment. 7465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1; i != NumStringToks; ++i) { 7475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The string could be shorter than this if it needs cleaning, but this is a 7485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reasonable bound, which is all we need. 7495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound += StringToks[i].getLength()-2; // -2 for "". 7505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember maximum string piece length. 7525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StringToks[i].getLength() > MaxTokenLength) 7535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[i].getLength(); 7545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember if we see any wide strings. 75622f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide |= StringToks[i].is(tok::wide_string_literal); 7575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 758dbb1ecc32ca122b07b7c98fd0a8f6f53985adaccChris Lattner 7595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Include space for the null terminator. 7605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++SizeBound; 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R warning: "traditional C rejects string constant concatenation" 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the width in bytes of wchar_t. If no wchar_t strings are used, do not 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // query the target. As such, wchar_tByteWidth is only valid if AnyWide=true. 7665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth = ~0U; 7675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 768bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner wchar_tByteWidth = PP.getTargetInfo().getWCharWidth(); 7695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert((wchar_tByteWidth & 7) == 0 && "Assumes wchar_t is byte multiple!"); 7705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth /= 8; 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The output buffer size needs to be large enough to hold wide characters. 7745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This is a worst-case assumption which basically corresponds to L"" "long". 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) 7765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound *= wchar_tByteWidth; 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Size the temporary buffer to hold the result string data. 7795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultBuf.resize(SizeBound); 7805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Likewise, but for each string piece. 7825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallString<512> TokenBuf; 7835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TokenBuf.resize(MaxTokenLength); 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Loop over all the strings, getting their spelling, and expanding them to 7865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // wide strings as appropriate. 7875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr = &ResultBuf[0]; // Next byte to fill in. 7885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 789ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = false; 790ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 7915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = NumStringToks; i != e; ++i) { 7925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokBuf = &TokenBuf[0]; 7935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the spelling of the token, which eliminates trigraphs, etc. We know 7945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that ThisTokBuf points to a buffer that is big enough for the whole token 7955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and 'spelled' tokens can only shrink. 7965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ThisTokLen = PP.getSpelling(StringToks[i], ThisTokBuf); 7975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd = ThisTokBuf+ThisTokLen-1; // Skip end quote. 7985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Input character set mapping support. 8005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip L marker for wide strings. 8025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool ThisIsWide = false; 8035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] == 'L') { 8045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 8055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisIsWide = true; 8065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(ThisTokBuf[0] == '"' && "Expected quote, lexer broken?"); 8095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 8105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 811ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Check if this is a pascal string 812ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (pp.getLangOptions().PascalStrings && ThisTokBuf + 1 != ThisTokEnd && 813ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf[0] == '\\' && ThisTokBuf[1] == 'p') { 814ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 815ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // If the \p sequence is found in the first token, we have a pascal string 816ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Otherwise, if we already have a pascal string, ignore the first \p 817ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (i == 0) { 818ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ++ThisTokBuf; 819ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = true; 820ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } else if (Pascal) 821ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf += 2; 822ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } 823ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 8245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (ThisTokBuf != ThisTokEnd) { 8255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Is this a span of non-escape characters? 8265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] != '\\') { 8275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *InStart = ThisTokBuf; 8285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 8295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 8305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && ThisTokBuf[0] != '\\'); 8315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Copy the character span over. 8335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned Len = ThisTokBuf-InStart; 8345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!AnyWide) { 8355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer memcpy(ResultPtr, InStart, Len); 8365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr += Len; 8375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 8385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Note: our internal rep of wide char tokens is always little-endian. 8395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; Len; --Len, ++InStart) { 8405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = InStart[0]; 8415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add zeros at the end. 8425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 8430e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff *ResultPtr++ = 0; 8445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 8475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8484e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Is this a Universal Character Name escape? 8490e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff if (ThisTokBuf[1] == 'u' || ThisTokBuf[1] == 'U') { 8500e3e3eb3879d5a7aaca4a393706149ddef8544f1Steve Naroff ProcessUCNEscape(ThisTokBuf, ThisTokEnd, ResultPtr, 8518a5c0cd90b8d607ca284274000ed8716b836d253Steve Naroff hadError, StringToks[i].getLocation(), ThisIsWide, PP); 8524e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff continue; 8534e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff } 8544e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Otherwise, this is a non-UCN escape character. Process it. 8554e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff unsigned ResultChar = ProcessCharEscape(ThisTokBuf, ThisTokEnd, hadError, 8564e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff StringToks[i].getLocation(), 8574e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff ThisIsWide, PP); 8584e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff 8594e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff // Note: our internal rep of wide char tokens is always little-endian. 8604e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff *ResultPtr++ = ResultChar & 0xFF; 8614e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff 8624e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff if (AnyWide) { 8634e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 8644e93b34fdb798abfa0534062a139f2c37cbf876eSteve Naroff *ResultPtr++ = ResultChar >> i*8; 8655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 869bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner if (Pascal) { 870ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ResultBuf[0] = ResultPtr-&ResultBuf[0]-1; 871bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner 872bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner // Verify that pascal strings aren't too large. 87357d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman if (GetStringLength() > 256) { 874bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner PP.Diag(StringToks[0].getLocation(), diag::err_pascal_string_too_long) 875bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner << SourceRange(StringToks[0].getLocation(), 876bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner StringToks[NumStringToks-1].getLocation()); 87757d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman hadError = 1; 87857d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman return; 87957d7dde770c67b282e7fb77b1b81e429910937b3Eli Friedman } 880bbee00b6456e90a09f63c83c20233e6c5ad6000aChris Lattner } 8815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 882719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 883719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 884719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// getOffsetOfStringByte - This function returns the offset of the 885719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// specified byte of the string data represented by Token. This handles 886719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner/// advancing over escape sequences in the string. 887719e61573f27c11057ecfe0dd8f141621602c571Chris Lattnerunsigned StringLiteralParser::getOffsetOfStringByte(const Token &Tok, 888719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner unsigned ByteNo, 889719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner Preprocessor &PP) { 890719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Get the spelling of the token. 891719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner llvm::SmallString<16> SpellingBuffer; 892719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner SpellingBuffer.resize(Tok.getLength()); 893719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 894719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingPtr = &SpellingBuffer[0]; 895719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner unsigned TokLen = PP.getSpelling(Tok, SpellingPtr); 896719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 897719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr[0] != 'L' && "Doesn't handle wide strings yet"); 898719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 899719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 900719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingStart = SpellingPtr; 901719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner const char *SpellingEnd = SpellingPtr+TokLen; 902719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 903719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Skip over the leading quote. 904719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr[0] == '"' && "Should be a string literal!"); 905719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 906719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 907719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Skip over bytes until we find the offset we're looking for. 908719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner while (ByteNo) { 909719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(SpellingPtr < SpellingEnd && "Didn't find byte offset!"); 910719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 911719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Step over non-escapes simply. 912719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner if (*SpellingPtr != '\\') { 913719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ++SpellingPtr; 914719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner --ByteNo; 915719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner continue; 916719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 917719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 918719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner // Otherwise, this is an escape character. Advance over it. 919719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner bool HadError = false; 920719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner ProcessCharEscape(SpellingPtr, SpellingEnd, HadError, 921719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner Tok.getLocation(), false, PP); 922719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner assert(!HadError && "This method isn't valid on erroneous strings"); 923719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner --ByteNo; 924719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner } 925719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner 926719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner return SpellingPtr-SpellingStart; 927719e61573f27c11057ecfe0dd8f141621602c571Chris Lattner} 928