LiteralSupport.cpp revision 4984212fced6d9c6538ebb7319839105e3880b45
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- LiteralSupport.cpp - Code to parse and process literals ----------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the NumericLiteralParser, CharLiteralParser, and 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// StringLiteralParser interfaces. 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/LiteralSupport.h" 165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Lex/Preprocessor.h" 175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/Basic/Diagnostic.h" 18136f93a2b660fc780fc2dba82a6f42ca4dc9164aChris Lattner#include "clang/Basic/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 755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer //case 'u': case 'U': // FIXME: UCNs. 765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case 'x': { // Hex escape. 775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf == ThisTokEnd || !isxdigit(*ThisTokBuf)) { 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::err_hex_escape_no_digits); 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = 1; 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Hex escapes are a maximal series of hex digits. 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Overflow = false; 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; ThisTokBuf != ThisTokEnd; ++ThisTokBuf) { 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer int CharVal = HexDigitValue(ThisTokBuf[0]); 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharVal == -1) break; 89c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // About to shift out a digit? 90c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner Overflow |= (ResultChar & 0xF0000000) ? true : false; 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 4; 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= CharVal; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See if any bits will be truncated when evaluated as a character. 9698be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharWidth = PP.getTargetInfo().getCharWidth(IsWide); 979c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Overflow = true; 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. 1045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Overflow) // Too many digits to fit in 1055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_hex_escape_too_large); 1065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '0': case '1': case '2': case '3': 1095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '4': case '5': case '6': case '7': { 1105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes. 1115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer --ThisTokBuf; 1125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = 0; 1135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Octal escapes are a series of octal digits with maximum length 3. 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // "\0123" is a two digit sequence equal to "\012" "3". 1165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned NumDigits = 0; 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar <<= 3; 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar |= *ThisTokBuf++ - '0'; 1205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++NumDigits; 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && NumDigits < 3 && 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisTokBuf[0] >= '0' && ThisTokBuf[0] <= '7'); 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Check for overflow. Reject '\777', but not L'\777'. 12598be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharWidth = PP.getTargetInfo().getCharWidth(IsWide); 1269c728dc4d8da89c73fcae74c9e72d7a83ffd7b6dTed Kremenek 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (CharWidth != 32 && (ResultChar >> CharWidth) != 0) { 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_octal_escape_too_large); 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar &= ~0U >> (32-CharWidth); 1305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, these are not valid escapes. 1355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case '(': case '{': case '[': case '%': 1365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // GCC accepts these as extensions. We warn about them as such though. 1375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!PP.getLangOptions().NoExtensions) { 138204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_nonstandard_escape) 139204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner << std::string()+(char)ResultChar; 1405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FALL THROUGH. 1435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 144ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner if (isgraph(ThisTokBuf[0])) 145204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_unknown_escape) << std::string()+(char)ResultChar; 146ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner else 147204b2fed909b1eabea7aeb6caadd7cff718edee5Chris Lattner PP.Diag(Loc, diag::ext_unknown_escape) << "x"+llvm::utohexstr(ResultChar); 1485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return ResultChar; 1525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-constant: [C99 6.4.4.1] 1585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant integer-suffix 1595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant integer-suffix 1605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant integer-suffix 1615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant: 1625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit 1635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// decimal-constant digit 1645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant: 1655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-constant octal-digit 1675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant: 1685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix hexadecimal-digit 1695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-constant hexadecimal-digit 1705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-prefix: one of 1715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0x 0X 1725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer-suffix: 1735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-suffix] 1745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix [long-long-suffix] 1755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix [unsigned-suffix] 1765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix [unsigned-sufix] 1775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// nonzero-digit: 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1 2 3 4 5 6 7 8 9 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit: 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hexadecimal-digit: 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 0 1 2 3 4 5 6 7 8 9 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// a b c d e f 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// A B C D E F 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// unsigned-suffix: one of 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// u U 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-suffix: one of 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// l L 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// long-long-suffix: one of 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// ll LL 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// floating-constant: [C99 6.4.4.2] 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// TODO: add rules... 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser:: 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerNumericLiteralParser(const char *begin, const char *end, 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation TokLoc, Preprocessor &pp) 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), ThisTokBegin(begin), ThisTokEnd(end) { 199c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner 200c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // This routine assumes that the range begin/end matches the regex for integer 201c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // and FP constants (specifically, the 'pp-number' regex), and assumes that 202c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // the byte at "*end" is both valid and not part of the regex. Because of 203c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner // this, it doesn't have to check for 'overscan' in various places. 204c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner assert(!isalnum(*end) && *end != '.' && *end != '_' && 205c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner "Lexer didn't maximally munch?"); 206c29bbde0a14a664d6843b21d3791478d1f4d2833Chris Lattner 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin = begin; 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = false; 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = false; 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = false; 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isUnsigned = false; 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLongLong = false; 2136e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = false; 214506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = false; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '0') { // parse radix 218368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ParseNumberStartingWithZero(TokLoc); 219368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (hadError) 220368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { // the first digit is non-zero 2225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer radix = 10; 2235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (s == ThisTokEnd) { 2255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Done. 226016765e3453db2e302efe53905e99cdb25501234Christopher Lamb } else if (isxdigit(*s) && !(*s == 'e' || *s == 'E')) { 227ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 228ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_decimal_digit) << std::string(s, s+1); 229ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return; 2315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else if (*s == '.') { 2325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_period = true; 2345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = SkipDigits(s); 2355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2364411f46050216a139ab2fc7ff145ec384d11ec7fChris Lattner if ((*s == 'e' || *s == 'E')) { // exponent 23770f66ab053f36ab3df7a778d09bcb2b4b0fec1f8Chris Lattner const char *Exponent = s; 2385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s++; 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer saw_exponent = true; 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (*s == '+' || *s == '-') s++; // sign 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *first_non_digit = SkipDigits(s); 2420b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner if (first_non_digit != s) { 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = first_non_digit; 2440b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner } else { 245ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-begin), 246ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 247ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 2480b7f69d789ca1f76582ee9a336e25861fd0c1416Chris Lattner return; 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SuffixBegin = s; 254506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 255506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Parse the suffix. At this point we can classify whether we have an FP or 256506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // integer constant. 257506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner bool isFPConstant = isFloatingLiteral(); 258506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 259506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Loop over all of the characters of the suffix. If we see something bad, 260506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // we break out of the loop. 261506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner for (; s != ThisTokEnd; ++s) { 262506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner switch (*s) { 263506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'f': // FP Suffix for "float" 264506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'F': 265506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (!isFPConstant) break; // Error for integer constant. 2666e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat || isLong) break; // FF, LF invalid. 2676e400c286b485e28d04a742ea87860ddfefa672eChris Lattner isFloat = true; 268506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 269506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'u': 270506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'U': 271506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // Error for floating constant. 272506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isUnsigned) break; // Cannot be repeated. 273506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isUnsigned = true; 274506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 275506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'l': 276506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'L': 277506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isLong || isLongLong) break; // Cannot be repeated. 2786e400c286b485e28d04a742ea87860ddfefa672eChris Lattner if (isFloat) break; // LF invalid. 279506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 280506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Check for long long. The L's need to be adjacent and the same case. 281506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s+1 != ThisTokEnd && s[1] == s[0]) { 282506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isFPConstant) break; // long long invalid for floats. 283506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isLongLong = true; 284506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner ++s; // Eat both of them. 285506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } else { 2865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isLong = true; 2875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 288506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 289506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'i': 2900c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (PP.getLangOptions().Microsoft) { 2910c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // Allow i8, i16, i32, i64, and i128. 2920c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 2930c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff switch (*s) { 2940c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '8': 2950c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff s++; // i8 suffix 2960c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 2970c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '1': 2980c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 2990c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '6') s++; // i16 suffix 3000c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff else if (*s == '2') { 3010c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3020c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '8') s++; // i128 suffix 3030c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3040c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3050c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '3': 3060c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3070c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '2') s++; // i32 suffix 3080c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3090c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff case '6': 3100c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (++s == ThisTokEnd) break; 3110c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff if (*s == '4') s++; // i64 suffix 3120c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3130c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff default: 3140c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3150c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3160c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff break; 3170c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff } 3180c29b22f4384500cc0d04f3072cc5d5d58d10d6cSteve Naroff // fall through. 319506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'I': 320506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'j': 321506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner case 'J': 322506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (isImaginary) break; // Cannot be repeated. 323506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 324506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner diag::ext_imaginary_constant); 325506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner isImaginary = true; 326506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner continue; // Success. 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 328506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // If we reached here, there was an error. 329506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner break; 330506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner } 331506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner 332506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner // Report an error if there are any. 333506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner if (s != ThisTokEnd) { 334ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-begin), 335ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner isFPConstant ? diag::err_invalid_suffix_float_constant : 336ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_suffix_integer_constant) 337ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner << std::string(SuffixBegin, ThisTokEnd); 338ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 339506b8dec4ed3db3c60bf9e0dd37901f0cf3d6749Chris Lattner return; 3405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 3415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 343368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// ParseNumberStartingWithZero - This method is called when the first character 344368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// of the number is found to be a zero. This means it is either an octal 345368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// number (like '04') or a hex number ('0x123a') a binary number ('0b1010') or 346368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// a floating point number (01239.123e4). Eat the prefix, determining the 347368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner/// radix etc. 348368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattnervoid NumericLiteralParser::ParseNumberStartingWithZero(SourceLocation TokLoc) { 349368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner assert(s[0] == '0' && "Invalid method call"); 350368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 351368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 352368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle a hex number like 0x1234. 353368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if ((*s == 'x' || *s == 'X') && (isxdigit(s[1]) || s[1] == '.')) { 354368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 355368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 16; 356368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 357368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 358368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 359368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 360368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (*s == '.') { 361368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 362368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 363368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipHexDigits(s); 364368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 365368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // A binary exponent can appear with or with a '.'. If dotted, the 366368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // binary exponent is required. 3676ea623823f8532670480425b573f35115404b4a0Chris Lattner if (*s == 'p' || *s == 'P') { 368368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 369368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 370368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 371368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 372368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 3736ea623823f8532670480425b573f35115404b4a0Chris Lattner if (first_non_digit == s) { 374ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 375ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 376ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 3776ea623823f8532670480425b573f35115404b4a0Chris Lattner return; 378368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 3796ea623823f8532670480425b573f35115404b4a0Chris Lattner s = first_non_digit; 3806ea623823f8532670480425b573f35115404b4a0Chris Lattner 3814984212fced6d9c6538ebb7319839105e3880b45Chris Lattner if (!PP.getLangOptions().HexFloats) 382ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(TokLoc, diag::ext_hexconstant_invalid); 383368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (saw_period) { 384ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 385ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_hexconstant_requires_exponent); 386ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 387368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 388368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 389368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 390368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 391368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Handle simple binary numbers 0b01010 392368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'b' || *s == 'B') { 393368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // 0b101010 is a GCC extension. 394413d355e38755a71f106dbc0ac900ca989070916Chris Lattner PP.Diag(TokLoc, diag::ext_binary_literal); 395368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner ++s; 396368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 2; 397368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 398368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipBinaryDigits(s); 399368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) { 400368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // Done. 401368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else if (isxdigit(*s)) { 402ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 403ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_binary_digit) << std::string(s, s+1); 404ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 405368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 406413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // Other suffixes will be diagnosed by the caller. 407368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 408368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 409368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 410368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // For now, the radix is set to 8. If we discover that we have a 411368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // floating point constant, the radix will change to 10. Octal floating 412368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner // point constants are not permitted (only decimal and hexadecimal). 413368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 8; 414368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner DigitsBegin = s; 415368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = SkipOctalDigits(s); 416368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (s == ThisTokEnd) 417368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; // Done, simple octal number like 01234 418368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 419413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have some other non-octal digit that *is* a decimal digit, see if 420413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // this is part of a floating point number like 094.123 or 09e1. 421413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (isdigit(*s)) { 422413d355e38755a71f106dbc0ac900ca989070916Chris Lattner const char *EndDecimal = SkipDigits(s); 423413d355e38755a71f106dbc0ac900ca989070916Chris Lattner if (EndDecimal[0] == '.' || EndDecimal[0] == 'e' || EndDecimal[0] == 'E') { 424413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = EndDecimal; 425413d355e38755a71f106dbc0ac900ca989070916Chris Lattner radix = 10; 426413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 427413d355e38755a71f106dbc0ac900ca989070916Chris Lattner } 428413d355e38755a71f106dbc0ac900ca989070916Chris Lattner 429413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // If we have a hex digit other than 'e' (which denotes a FP exponent) then 430413d355e38755a71f106dbc0ac900ca989070916Chris Lattner // the code is using an incorrect base. 431368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (isxdigit(*s) && *s != 'e' && *s != 'E') { 432ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, s-ThisTokBegin), 433ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_invalid_octal_digit) << std::string(s, s+1); 434ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 435368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 436368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 437368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 438368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '.') { 439368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 440368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 441368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_period = true; 442413d355e38755a71f106dbc0ac900ca989070916Chris Lattner s = SkipDigits(s); // Skip suffix. 443368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 444368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == 'e' || *s == 'E') { // exponent 445368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *Exponent = s; 446368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s++; 447368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner radix = 10; 448368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner saw_exponent = true; 449368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (*s == '+' || *s == '-') s++; // sign 450368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner const char *first_non_digit = SkipDigits(s); 451368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner if (first_non_digit != s) { 452368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner s = first_non_digit; 453368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } else { 454ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner PP.Diag(PP.AdvanceToTokenCharacter(TokLoc, Exponent-ThisTokBegin), 455ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner diag::err_exponent_has_no_digits); 456ac92d829111bc19d1cc97cd85c3c04bc39b969d1Chris Lattner hadError = true; 457368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner return; 458368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 459368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner } 460368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner} 461368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 462368328c88bd46f471bbf85f05438b4f2eb95df5bChris Lattner 4635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// GetIntegerValue - Convert this numeric literal value to an APInt that 4645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// matches Val's input width. If there is an overflow, set Val to the low bits 4655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// of the result and return true. Otherwise, return false. 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool NumericLiteralParser::GetIntegerValue(llvm::APInt &Val) { 467a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // Fast path: Compute a conservative bound on the maximum number of 468a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // bits per digit in this radix. If we can't possibly overflow a 469a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // uint64 based on that bound then do the simple conversion to 470a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // integer. This avoids the expensive overflow checking below, and 471a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // handles the common cases that matter (small decimal integers and 472a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // hex/octal values which don't overflow). 473a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar unsigned MaxBitsPerDigit = 1; 474a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar while ((1U << MaxBitsPerDigit) < radix) 475a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar MaxBitsPerDigit += 1; 476a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar if ((SuffixBegin - DigitsBegin) * MaxBitsPerDigit <= 64) { 477a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar uint64_t N = 0; 478a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar for (s = DigitsBegin; s != SuffixBegin; ++s) 479a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar N = N*radix + HexDigitValue(*s); 480a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 481a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // This will truncate the value to Val's input width. Simply check 482a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar // for overflow by comparing. 483a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar Val = N; 484a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar return Val.getZExtValue() != N; 485a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar } 486a179be34c1a3c0190e6b9e39dee2197651f44a5dDaniel Dunbar 4875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val = 0; 4885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer s = DigitsBegin; 4895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt RadixVal(Val.getBitWidth(), radix); 4915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt CharVal(Val.getBitWidth(), 0); 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APInt OldVal = Val; 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool OverflowOccurred = false; 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (s < SuffixBegin) { 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned C = HexDigitValue(*s++); 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this letter is out of bound for this radix, reject it. 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(C < radix && "NumericLiteralParser ctor should have rejected this"); 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer CharVal = C; 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add the digit to the value in the appropriate radix. If adding in digits 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // made the value smaller, then this overflowed. 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OldVal = Val; 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Multiply by radix, did overflow occur on the multiply? 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val *= RadixVal; 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.udiv(RadixVal) != OldVal; 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add value, did overflow occur on the value? 512d70cb645702bdbb42aee58403306a7c47e0d901cDaniel Dunbar // (a + b) ult b <=> overflow 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Val += CharVal; 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer OverflowOccurred |= Val.ult(CharVal); 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return OverflowOccurred; 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 519525a05093a4816af961fe2bc6b8a81c17e2e26c2Chris Lattnerllvm::APFloat NumericLiteralParser:: 520427d5af5b601985093b6b4b33ba1e30fc24d86dcTed KremenekGetFloatValue(const llvm::fltSemantics &Format, bool* isExact) { 521427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek using llvm::APFloat; 522427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 52332e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek llvm::SmallVector<char,256> floatChars; 52432e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek for (unsigned i = 0, n = ThisTokEnd-ThisTokBegin; i != n; ++i) 52532e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back(ThisTokBegin[i]); 52632e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 52732e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek floatChars.push_back('\0'); 52832e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 529427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat V (Format, APFloat::fcZero, false); 530427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek APFloat::opStatus status; 53132e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek 53232e61bf91fba3c7946b9f71918202e5e55859a5cTed Kremenek status = V.convertFromString(&floatChars[0],APFloat::rmNearestTiesToEven); 533427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 534427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek if (isExact) 535427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek *isExact = status == APFloat::opOK; 536427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek 537427d5af5b601985093b6b4b33ba1e30fc24d86dcTed Kremenek return V; 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCharLiteralParser::CharLiteralParser(const char *begin, const char *end, 5425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation Loc, Preprocessor &PP) { 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // At this point we know that the character matches the regex "L?'.*'". 5445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer HadError = false; 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = 0; 5465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Determine if this is a wide character. 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IsWide = begin[0] == 'L'; 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) ++begin; 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip over the entry quote. 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(begin[0] == '\'' && "Invalid token lexed"); 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++begin; 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This assumes that 'int' is 32-bits in overflow calculation, and the 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // size of "value". 55798be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getIntWidth() == 32 && 5585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes sizeof(int) == 4 for now"); 5595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This assumes that wchar_t is 32-bits for now. 56098be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getWCharWidth() == 32 && 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes sizeof(wchar_t) == 4 for now"); 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // FIXME: This extensively assumes that 'char' is 8-bits. 56398be4943e8dc4f3905629a7102668960873cf863Chris Lattner assert(PP.getTargetInfo().getCharWidth() == 8 && 5645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer "Assumes char is 8 bits"); 5655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isFirstChar = true; 5675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool isMultiChar = false; 5685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (begin[0] != '\'') { 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar; 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (begin[0] != '\\') // If this is a normal character, consume it. 5715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = *begin++; 5725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else // Otherwise, this is an escape character. 5735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultChar = ProcessCharEscape(begin, end, HadError, Loc, IsWide, PP); 5745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a multi-character constant (e.g. 'abc'), handle it. These are 5765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // implementation defined (C99 6.4.4.4p10). 5775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isFirstChar) { 5785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is the second character being processed, do special handling. 5795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isMultiChar) { 5805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isMultiChar = true; 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Warn about discarding the top bits for multi-char wide-character 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // constants (L'abcd'). 5845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) 5855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_extraneous_wide_char_constant); 5865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (IsWide) { 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Emulate GCC's (unintentional?) behavior: L'ab' -> L'b'. 5905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = 0; 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Narrow character literals act as though their value is concatenated 5935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // in this implementation. 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (((Value << 8) >> 8) != Value) 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer PP.Diag(Loc, diag::warn_char_constant_too_large); 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value <<= 8; 5975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value += ResultChar; 6015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isFirstChar = false; 6025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a single narrow character, sign extend it (e.g. '\xFF' is "-1") 6055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if 'char' is signed for this target (C99 6.4.4.4p10). Note that multiple 6065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // character constants are not sign extended in the this implementation: 6075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // '\xFF\xFF' = 65536 and '\x0\xFF' = 255, which matches GCC. 6085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!IsWide && !isMultiChar && (Value & 128) && 60998be4943e8dc4f3905629a7102668960873cf863Chris Lattner PP.getTargetInfo().isCharSigned()) 6105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Value = (signed char)Value; 6115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// string-literal: [C99 6.4.5] 6155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// " [s-char-sequence] " 6165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// L" [s-char-sequence] " 6175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence: 6185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char 6195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char-sequence s-char 6205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// s-char: 6215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// any source character except the double quote ", 6225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// backslash \, or newline character 6235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character 6245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-character: [C99 6.4.4.4] 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ escape-code 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name 6285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// escape-code: 6295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code 6305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code 6315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code 6325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// character-escape-code: one of 6335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// n t b r f v a 6345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \ ' " ? 6355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-escape-code: 6365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit 6375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit 6385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// octal-digit octal-digit octal-digit 6395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code: 6405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// x hex-digit 6415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-escape-code hex-digit 6425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// universal-character-name: 6435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \u hex-quad 6445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// \U hex-quad hex-quad 6455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-quad: 6465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hex-digit hex-digit hex-digit hex-digit 6475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteralParser:: 649d217773f106856a11879ec79dc468efefaf2ee75Chris LattnerStringLiteralParser(const Token *StringToks, unsigned NumStringToks, 6505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Preprocessor &pp, TargetInfo &t) 6515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer : PP(pp), Target(t) { 6525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Scan all of the string portions, remember the max individual token length, 6535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // computing a bound on the concatenated string length, and see whether any 6545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // piece is a wide-string. If any of the string portions is a wide-string 6555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // literal, the result is a wide-string literal [C99 6.4.5p4]. 6565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[0].getLength(); 6575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound = StringToks[0].getLength()-2; // -2 for "". 65822f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide = StringToks[0].is(tok::wide_string_literal); 6595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer hadError = false; 6615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Implement Translation Phase #6: concatenation of string literals 6635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer /// (C99 5.1.1.2p1). The common case is only one string fragment. 6645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1; i != NumStringToks; ++i) { 6655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The string could be shorter than this if it needs cleaning, but this is a 6665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // reasonable bound, which is all we need. 6675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound += StringToks[i].getLength()-2; // -2 for "". 6685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember maximum string piece length. 6705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (StringToks[i].getLength() > MaxTokenLength) 6715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer MaxTokenLength = StringToks[i].getLength(); 6725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Remember if we see any wide strings. 67422f6bbcafa8871f4f20c4402d9cbc5c024fee99aChris Lattner AnyWide |= StringToks[i].is(tok::wide_string_literal); 6755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Include space for the null terminator. 6795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++SizeBound; 6805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: K&R warning: "traditional C rejects string constant concatenation" 6825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the width in bytes of wchar_t. If no wchar_t strings are used, do not 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // query the target. As such, wchar_tByteWidth is only valid if AnyWide=true. 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth = ~0U; 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 68798be4943e8dc4f3905629a7102668960873cf863Chris Lattner wchar_tByteWidth = Target.getWCharWidth(); 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert((wchar_tByteWidth & 7) == 0 && "Assumes wchar_t is byte multiple!"); 6895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer wchar_tByteWidth /= 8; 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The output buffer size needs to be large enough to hold wide characters. 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // This is a worst-case assumption which basically corresponds to L"" "long". 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SizeBound *= wchar_tByteWidth; 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Size the temporary buffer to hold the result string data. 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultBuf.resize(SizeBound); 6995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Likewise, but for each string piece. 7015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::SmallString<512> TokenBuf; 7025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer TokenBuf.resize(MaxTokenLength); 7035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Loop over all the strings, getting their spelling, and expanding them to 7055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // wide strings as appropriate. 7065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr = &ResultBuf[0]; // Next byte to fill in. 7075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 708ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = false; 709ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 7105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0, e = NumStringToks; i != e; ++i) { 7115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokBuf = &TokenBuf[0]; 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Get the spelling of the token, which eliminates trigraphs, etc. We know 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // that ThisTokBuf points to a buffer that is big enough for the whole token 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // and 'spelled' tokens can only shrink. 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ThisTokLen = PP.getSpelling(StringToks[i], ThisTokBuf); 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *ThisTokEnd = ThisTokBuf+ThisTokLen-1; // Skip end quote. 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: Input character set mapping support. 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Skip L marker for wide strings. 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool ThisIsWide = false; 7225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] == 'L') { 7235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 7245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisIsWide = true; 7255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(ThisTokBuf[0] == '"' && "Expected quote, lexer broken?"); 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 730ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Check if this is a pascal string 731ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (pp.getLangOptions().PascalStrings && ThisTokBuf + 1 != ThisTokEnd && 732ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf[0] == '\\' && ThisTokBuf[1] == 'p') { 733ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 734ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // If the \p sequence is found in the first token, we have a pascal string 735ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson // Otherwise, if we already have a pascal string, ignore the first \p 736ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (i == 0) { 737ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ++ThisTokBuf; 738ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson Pascal = true; 739ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } else if (Pascal) 740ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ThisTokBuf += 2; 741ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson } 742ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 7435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (ThisTokBuf != ThisTokEnd) { 7445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Is this a span of non-escape characters? 7455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (ThisTokBuf[0] != '\\') { 7465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const char *InStart = ThisTokBuf; 7475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer do { 7485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ++ThisTokBuf; 7495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } while (ThisTokBuf != ThisTokEnd && ThisTokBuf[0] != '\\'); 7505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Copy the character span over. 7525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned Len = ThisTokBuf-InStart; 7535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!AnyWide) { 7545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer memcpy(ResultPtr, InStart, Len); 7555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ResultPtr += Len; 7565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 7575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Note: our internal rep of wide char tokens is always little-endian. 7585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (; Len; --Len, ++InStart) { 7595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = InStart[0]; 7605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add zeros at the end. 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 7625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = 0; 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer continue; 7665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Otherwise, this is an escape character. Process it. 7695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer unsigned ResultChar = ProcessCharEscape(ThisTokBuf, ThisTokEnd, hadError, 7705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StringToks[i].getLocation(), 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ThisIsWide, PP); 7725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Note: our internal rep of wide char tokens is always little-endian. 7745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = ResultChar & 0xFF; 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 7785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = ResultChar >> i*8; 7795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Add zero terminator. 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr = 0; 7855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (AnyWide) { 7865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 1, e = wchar_tByteWidth; i != e; ++i) 7875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer *ResultPtr++ = 0; 7885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 789ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson 790ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson if (Pascal) 791ee98ac5a1330db432b188dd2d38b6631aac47bf1Anders Carlsson ResultBuf[0] = ResultPtr-&ResultBuf[0]-1; 7925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 793