PTHLexer.cpp revision 6f78c3b8b9343e7e9fbf2d457cccf00df6da5d47
1274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek//===--- PTHLexer.cpp - Lex from a token stream ---------------------------===// 2274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 3274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// The LLVM Compiler Infrastructure 4274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 5274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// This file is distributed under the University of Illinois Open Source 6274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// License. See LICENSE.TXT for details. 7274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 8274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek//===----------------------------------------------------------------------===// 9274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 10274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// This file implements the PTHLexer interface. 11274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek// 12274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek//===----------------------------------------------------------------------===// 13274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/TokenKinds.h" 150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/FileManager.h" 160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Basic/IdentifierTable.h" 17274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/PTHLexer.h" 18274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek#include "clang/Lex/Preprocessor.h" 190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/PTHManager.h" 200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Token.h" 210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "clang/Lex/Preprocessor.h" 220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/ADT/StringMap.h" 230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek#include "llvm/ADT/OwningPtr.h" 246f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner#include "llvm/Support/Compiler.h" 256f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner#include "llvm/Support/MathExtras.h" 266f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner#include "llvm/Support/MemoryBuffer.h" 276f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner#include "llvm/System/Host.h" 28274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenekusing namespace clang; 29274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 307b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek#define DISK_TOKEN_SIZE (1+1+2+4+4) 31268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 32e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 33e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// Utility methods for reading from the mmap'ed PTH file. 34e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 35e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 365ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattnerstatic inline uint16_t ReadUnalignedLE16(const unsigned char *&Data) { 37da9d61c96c412f6babc7f824152609562f302388Chris Lattner uint16_t V = ((uint16_t)Data[0] << 0) | 38da9d61c96c412f6babc7f824152609562f302388Chris Lattner ((uint16_t)Data[1] << 8); 39da9d61c96c412f6babc7f824152609562f302388Chris Lattner Data += 2; 40da9d61c96c412f6babc7f824152609562f302388Chris Lattner return V; 41da9d61c96c412f6babc7f824152609562f302388Chris Lattner} 42da9d61c96c412f6babc7f824152609562f302388Chris Lattner 435ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattnerstatic inline uint32_t ReadLE32(const unsigned char *&Data) { 446f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner // Hosts that directly support unaligned little-endian 32-bit loads can just 456f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner // use them. 46f15674c680730c652a37a16a5d3f3ff429b0c308Chris Lattner uint32_t V = *((uint32_t*)Data); 476f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner if (llvm::sys::isBigEndianHost()) 486f78c3b8b9343e7e9fbf2d457cccf00df6da5d47Chris Lattner V = llvm::ByteSwap_32(V); 49da9d61c96c412f6babc7f824152609562f302388Chris Lattner Data += 4; 50e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek return V; 51e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek} 52e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 53da9d61c96c412f6babc7f824152609562f302388Chris Lattner 54e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 55e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// PTHLexer methods. 56e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek//===----------------------------------------------------------------------===// 57e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 58da9d61c96c412f6babc7f824152609562f302388Chris LattnerPTHLexer::PTHLexer(Preprocessor &PP, FileID FID, const unsigned char *D, 59da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *ppcond, 602b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner PTHSpellingSearch &mySpellingSrch, PTHManager &PM) 612b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner : PreprocessorLexer(&PP, FID), TokBuf(D), CurPtr(D), LastHashTokPtr(0), 625f074266cc59563036c40516c814d63825723e20Ted Kremenek PPCond(ppcond), CurPPCondPtr(ppcond), MySpellingSrch(mySpellingSrch), 632b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner PTHMgr(PM) { 642b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 652b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileStartLoc = PP.getSourceManager().getLocForStartOfFile(FID); 665f074266cc59563036c40516c814d63825723e20Ted Kremenek} 67274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 68e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenekvoid PTHLexer::Lex(Token& Tok) { 69e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted KremenekLexNextToken: 70866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 71866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 72866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Read the raw token data. 73866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 74e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 75866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Shadow CurPtr into an automatic variable. 76aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner const unsigned char *CurPtrShadow = CurPtr; 77866bdf74547efe32c320554837ffce00fcc084feTed Kremenek 781b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // Read in the data for the token. 795ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Word0 = ReadLE32(CurPtrShadow); 805ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t IdentifierID = ReadLE32(CurPtrShadow); 815ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t FileOffset = ReadLE32(CurPtrShadow); 827b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 837b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek tok::TokenKind TKind = (tok::TokenKind) (Word0 & 0xFF); 847b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek Token::TokenFlags TFlags = (Token::TokenFlags) ((Word0 >> 8) & 0xFF); 85aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner uint32_t Len = Word0 >> 16; 867b78b7c6d96deb1e63f8d0655ee6fa53de0b65efTed Kremenek 87aff6ef8e7bc3c3739f984c390e0af693e60be064Chris Lattner CurPtr = CurPtrShadow; 88e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 89866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 90866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Construct the token itself. 91866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 92e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 93866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.startToken(); 94898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setKind(TKind); 95898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner Tok.setFlag(TFlags); 9659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 972b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner Tok.setLocation(FileStartLoc.getFileLocWithOffset(FileOffset)); 98866bdf74547efe32c320554837ffce00fcc084feTed Kremenek Tok.setLength(Len); 9989d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 100d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner // Handle identifiers. 101d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (IdentifierID) { 102d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner MIOpt.ReadToken(); 103d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner IdentifierInfo *II = PTHMgr.GetIdentifierInfo(IdentifierID-1); 104d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner Tok.setIdentifierInfo(II); 105d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (II->isHandleIdentifierCase()) 106d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner PP->HandleIdentifier(Tok); 107d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner return; 108d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner } 109d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner 110866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 111866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Process the token. 112866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 1135f074266cc59563036c40516c814d63825723e20Ted Kremenek#if 0 1145f074266cc59563036c40516c814d63825723e20Ted Kremenek SourceManager& SM = PP->getSourceManager(); 1155f074266cc59563036c40516c814d63825723e20Ted Kremenek llvm::cerr << SM.getFileEntryForID(FileID)->getName() 1165f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalLineNumber(Tok.getLocation()) 1175f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalColumnNumber(Tok.getLocation()) 1185f074266cc59563036c40516c814d63825723e20Ted Kremenek << '\n'; 1195f074266cc59563036c40516c814d63825723e20Ted Kremenek#endif 12089d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 121898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eof) { 122e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 123e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 124e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 125cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 12659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 12759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!ParsingPreprocessorDirective); 12859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 12959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 13059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek // FIXME: Issue diagnostics similar to Lexer. 13159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->HandleEndOfFile(Tok, false)) 132d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 13359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 134cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek assert(PPCache && "Raw buffer::LexEndOfFile should return a token"); 135cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PPCache->Lex(Tok); 136cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 137d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 138898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::hash && Tok.isAtStartOfLine()) { 13959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 14059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 14159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek PP->HandleDirective(Tok); 142d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 14359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->isCurrentLexer(this)) 14459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek goto LexNextToken; 145e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 14659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return PP->Lex(Tok); 147e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 148e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 149898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eom) { 15059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(ParsingPreprocessorDirective); 15159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek ParsingPreprocessorDirective = false; 15259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return; 15359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek } 154274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 15559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek MIOpt.ReadToken(); 156cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 157cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 158e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 159e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 16059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenekvoid PTHLexer::getEOF(Token& Tok) { 161defb7094c835998bb821e894253287625ce8c74dTed Kremenek assert(EofToken.is(tok::eof)); 1620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 163274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 16417ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 16517ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 16617ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 16717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1684d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 169e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 170e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 171e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 172e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 17374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 17474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 17574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 176da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* p = CurPtr; 17774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 17874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 17974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 18074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 181e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 18274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 18374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 18480d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 18574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 18674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 18774c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 18874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 18974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 19074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 19117ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 193268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 194268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 195268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 196268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 197268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 198da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryI = 0; 199268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t Offset; 200268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 201268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 202268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 20341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 2045ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Offset = ReadLE32(CurPPCondPtr); 20541a2660377d215d004fe413c03874bd066b5384cTed Kremenek 20641a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the target table index from the side-table. 2075ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(CurPPCondPtr); 20841a2660377d215d004fe413c03874bd066b5384cTed Kremenek 20941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 21041a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 21141a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 21341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 21441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 21541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 21641a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 21741a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 220da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = 221da9d61c96c412f6babc7f824152609562f302388Chris Lattner PPCond + TableIdx*(sizeof(uint32_t)*2); 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 22341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 2245ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TmpOffset = ReadLE32(NextPPCondPtr); 225da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryJ = TokBuf + TmpOffset; 22641a2660377d215d004fe413c03874bd066b5384cTed Kremenek 22741a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 22841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 22941a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 23041a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 2315ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(NextPPCondPtr); 23241a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 23341a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 23441a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 235268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 23641a2660377d215d004fe413c03874bd066b5384cTed Kremenek while (HashEntryI < LastHashTokPtr); 23741a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 238268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 239268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 240268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 241da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 242268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 243268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 244268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 2465ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner HashEntryI = TokBuf + ReadLE32(NextPPCondPtr); 2475ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NextIdx = ReadLE32(NextPPCondPtr); 248268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 249268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 250268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 251268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 252268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 253268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 258268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 259268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 260268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 261268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 26241a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 26341a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 265268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 266e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 26841a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 269268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 270268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 271268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 272268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 27441a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 275268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 276268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 277268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 278268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 279268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 280e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 281da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(((tok::TokenKind)*CurPtr) == tok::hash); 282e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 283e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 284268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 285e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 286268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 287268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 288268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 289268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 29030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 2911b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // getSourceLocation is not on the hot path. It is used to get the location 2921b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // of the next token when transitioning back to this lexer when done 29330a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 29430a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 29530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 296b248d53f2599d8e7b53b144b713e163ca521ffcaTed Kremenek const unsigned char *OffsetPtr = CurPtr + (DISK_TOKEN_SIZE - 4); 2975ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Offset = ReadLE32(OffsetPtr); 2981b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return FileStartLoc.getFileLocWithOffset(Offset); 29930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 30030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 3015f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 3025f074266cc59563036c40516c814d63825723e20Ted Kremenek// getSpelling() - Use cached data in PTH files for getSpelling(). 3035f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 3045f074266cc59563036c40516c814d63825723e20Ted Kremenek 3052b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHManager::getSpelling(FileID FID, unsigned FPos, 3062b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner const char *&Buffer) { 3072b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner llvm::DenseMap<FileID, PTHSpellingSearch*>::iterator I =SpellingMap.find(FID); 3085f074266cc59563036c40516c814d63825723e20Ted Kremenek 3095f074266cc59563036c40516c814d63825723e20Ted Kremenek if (I == SpellingMap.end()) 3101b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return 0; 311f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 3122b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return I->second->getSpellingBinarySearch(FPos, Buffer); 3132b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner} 3142b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 3152b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHManager::getSpelling(SourceLocation Loc, const char *&Buffer) { 3166b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner SourceManager &SM = PP->getSourceManager(); 3176b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner Loc = SM.getSpellingLoc(Loc); 3186b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner std::pair<FileID, unsigned> LocInfo = SM.getDecomposedFileLoc(Loc); 3192b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return getSpelling(LocInfo.first, LocInfo.second, Buffer); 3205f074266cc59563036c40516c814d63825723e20Ted Kremenek} 3215f074266cc59563036c40516c814d63825723e20Ted Kremenek 3225f074266cc59563036c40516c814d63825723e20Ted Kremenekunsigned PTHManager::getSpellingAtPTHOffset(unsigned PTHOffset, 323da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char *&Buffer) { 3241b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(PTHOffset < Buf->getBufferSize()); 3251b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char* Ptr = 3261b5285e1ba31975864da356b2ed927e87670e654Chris Lattner (const unsigned char*)Buf->getBufferStart() + PTHOffset; 32732a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 32832a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // The string is prefixed by 16 bits for its length, followed by the string 32932a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // itself. 3305ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Len = ReadUnalignedLE16(Ptr); 3311b5285e1ba31975864da356b2ed927e87670e654Chris Lattner Buffer = (const char *)Ptr; 3321b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return Len; 33332a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek} 33432a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3351b5285e1ba31975864da356b2ed927e87670e654Chris Lattnerunsigned PTHSpellingSearch::getSpellingLinearSearch(unsigned FPos, 3365f074266cc59563036c40516c814d63825723e20Ted Kremenek const char *&Buffer) { 3371b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = LinearItr; 3381b5285e1ba31975864da356b2ed927e87670e654Chris Lattner unsigned Len = 0; 3395f074266cc59563036c40516c814d63825723e20Ted Kremenek 3401b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Ptr == TableEnd) 3411b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return getSpellingBinarySearch(FPos, Buffer); 3425f074266cc59563036c40516c814d63825723e20Ted Kremenek 3435f074266cc59563036c40516c814d63825723e20Ted Kremenek do { 3445ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokOffset = ReadLE32(Ptr); 34532a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3461b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset > FPos) 3471b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return getSpellingBinarySearch(FPos, Buffer); 34832a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 34932a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // Did we find a matching token offset for this spelling? 3501b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset == FPos) { 3515ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingPTHOffset = ReadLE32(Ptr); 3521b5285e1ba31975864da356b2ed927e87670e654Chris Lattner Len = PTHMgr.getSpellingAtPTHOffset(SpellingPTHOffset, Buffer); 35332a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek break; 35432a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek } 3551b5285e1ba31975864da356b2ed927e87670e654Chris Lattner } while (Ptr != TableEnd); 35632a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3571b5285e1ba31975864da356b2ed927e87670e654Chris Lattner LinearItr = Ptr; 3581b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return Len; 359b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek} 360b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 361da9d61c96c412f6babc7f824152609562f302388Chris Lattner 3621b5285e1ba31975864da356b2ed927e87670e654Chris Lattnerunsigned PTHSpellingSearch::getSpellingBinarySearch(unsigned FPos, 363da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char *&Buffer) { 3645f074266cc59563036c40516c814d63825723e20Ted Kremenek 365f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek assert((TableEnd - TableBeg) % SpellingEntrySize == 0); 3661b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(TableEnd >= TableBeg); 367f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 368f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek if (TableEnd == TableBeg) 369f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek return 0; 370f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 3715f074266cc59563036c40516c814d63825723e20Ted Kremenek unsigned min = 0; 3721b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *tb = TableBeg; 373f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek unsigned max = NumSpellings; 3745f074266cc59563036c40516c814d63825723e20Ted Kremenek 375f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek do { 3765f074266cc59563036c40516c814d63825723e20Ted Kremenek unsigned i = (max - min) / 2 + min; 3771b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = tb + (i * SpellingEntrySize); 3785f074266cc59563036c40516c814d63825723e20Ted Kremenek 3795ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokOffset = ReadLE32(Ptr); 3801b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset > FPos) { 3815f074266cc59563036c40516c814d63825723e20Ted Kremenek max = i; 382f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek assert(!(max == min) || (min == i)); 3835f074266cc59563036c40516c814d63825723e20Ted Kremenek continue; 3845f074266cc59563036c40516c814d63825723e20Ted Kremenek } 3855f074266cc59563036c40516c814d63825723e20Ted Kremenek 3861b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset < FPos) { 3877bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek if (i == min) 3887bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek break; 3897bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek 3905f074266cc59563036c40516c814d63825723e20Ted Kremenek min = i; 3915f074266cc59563036c40516c814d63825723e20Ted Kremenek continue; 3925f074266cc59563036c40516c814d63825723e20Ted Kremenek } 3935f074266cc59563036c40516c814d63825723e20Ted Kremenek 3945ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingPTHOffset = ReadLE32(Ptr); 3955f074266cc59563036c40516c814d63825723e20Ted Kremenek return PTHMgr.getSpellingAtPTHOffset(SpellingPTHOffset, Buffer); 3965f074266cc59563036c40516c814d63825723e20Ted Kremenek } 397f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek while (min != max); 3985f074266cc59563036c40516c814d63825723e20Ted Kremenek 3995f074266cc59563036c40516c814d63825723e20Ted Kremenek return 0; 4005f074266cc59563036c40516c814d63825723e20Ted Kremenek} 4015f074266cc59563036c40516c814d63825723e20Ted Kremenek 4022b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHLexer::getSpelling(SourceLocation Loc, const char *&Buffer) { 4032b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner SourceManager &SM = PP->getSourceManager(); 4042b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner Loc = SM.getSpellingLoc(Loc); 4052b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner std::pair<FileID, unsigned> LocInfo = SM.getDecomposedFileLoc(Loc); 4062b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 4072b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = LocInfo.first; 4082b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner unsigned FPos = LocInfo.second; 4095f074266cc59563036c40516c814d63825723e20Ted Kremenek 4102b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner if (FID == getFileID()) 4112b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return MySpellingSrch.getSpellingLinearSearch(FPos, Buffer); 4122b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return PTHMgr.getSpelling(FID, FPos, Buffer); 4135f074266cc59563036c40516c814d63825723e20Ted Kremenek} 4145f074266cc59563036c40516c814d63825723e20Ted Kremenek 4150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// Internal Data Structures for PTH file lookup and resolving identifiers. 4170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 4210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 4220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 4230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 4240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookup { 4250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 4260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek class Val { 427fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t TokenOff; 428fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t PPCondOff; 429b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t SpellingOff; 4300c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek public: 431fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek Val() : TokenOff(~0) {} 432b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek Val(uint32_t toff, uint32_t poff, uint32_t soff) 433b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek : TokenOff(toff), PPCondOff(poff), SpellingOff(soff) {} 4340c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4351b5285e1ba31975864da356b2ed927e87670e654Chris Lattner bool isValid() const { return TokenOff != ~((uint32_t)0); } 4361b5285e1ba31975864da356b2ed927e87670e654Chris Lattner 437fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t getTokenOffset() const { 4381b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 439fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return TokenOff; 4400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4410c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 442b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t getPPCondOffset() const { 4431b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 444fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return PPCondOff; 445fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek } 446fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek 447b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t getSpellingOffset() const { 4481b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 449b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek return SpellingOff; 450b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek } 4510c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek }; 4520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekprivate: 4540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::StringMap<Val> FileMap; 4550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 4570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek PTHFileLookup() {}; 4580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 459cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek bool isEmpty() const { 460cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return FileMap.empty(); 461cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 462cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 4630c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Val Lookup(const FileEntry* FE) { 4640c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* s = FE->getName(); 4650c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek unsigned size = strlen(s); 4660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return FileMap.GetOrCreateValue(s, s+size).getValue(); 4670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 469da9d61c96c412f6babc7f824152609562f302388Chris Lattner void ReadTable(const unsigned char* D) { 4705ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t N = ReadLE32(D); // Read the length of the table. 4710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4720c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek for ( ; N > 0; --N) { // The rest of the data is the table itself. 4735ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(D); 474da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char* s = (const char *)D; 4751b5285e1ba31975864da356b2ed927e87670e654Chris Lattner D += Len; 476b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 4775ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokenOff = ReadLE32(D); 4785ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t PPCondOff = ReadLE32(D); 4795ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingOff = ReadLE32(D); 480b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 4811b5285e1ba31975864da356b2ed927e87670e654Chris Lattner FileMap.GetOrCreateValue(s, s+Len).getValue() = 482b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek Val(TokenOff, PPCondOff, SpellingOff); 4830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4840c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 4860c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} // end anonymous namespace 4870c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 4900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4920c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 493da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* idDataTable, 494da9d61c96c412f6babc7f824152609562f302388Chris Lattner IdentifierInfo** perIDCache, 495da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* sortedIdTable, unsigned numIds) 4966183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 49772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IdDataTable(idDataTable), SortedIdTable(sortedIdTable), 49872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek NumIds(numIds), PP(0) {} 4990c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5000c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 5010c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 5020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 5030e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 5040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 5050c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 50672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekPTHManager* PTHManager::Create(const std::string& file) { 5070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 5080c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 5090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 5100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5110c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!File) 5120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 5150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 516da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufBeg = (unsigned char*)File->getBufferStart(); 517da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufEnd = (unsigned char*)File->getBufferEnd(); 5180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if(!(BufEnd > BufBeg + sizeof(uint32_t)*3)) { 5200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the address of the index table at the end of the PTH file. 5250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // This table contains the offset of the file lookup table, the 5260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // persistent ID -> identifer data table. 527293b4af04ca37576d4b228adf09acd6cee3ddb16Ted Kremenek // FIXME: We should just embed this offset in the PTH file. 528da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* EndTable = BufEnd - sizeof(uint32_t)*4; 5290c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5300c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 5310c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 532da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* FileTableOffset = EndTable + sizeof(uint32_t)*3; 5335ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* FileTable = BufBeg + ReadLE32(FileTableOffset); 5340c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5350c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 5360c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5370c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5380c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5400c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(new PTHFileLookup()); 5410c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek FL->ReadTable(FileTable); 542cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 543cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (FL->isEmpty()) 544cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 5450c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 5470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 548da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDTableOffset = EndTable + sizeof(uint32_t)*1; 5495ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* IData = BufBeg + ReadLE32(IDTableOffset); 550cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 551cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(IData >= BufBeg && IData < BufEnd)) { 5520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5550c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 55672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Get the location of the lexigraphically-sorted table of persistent IDs. 557da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* SortedIdTableOffset = EndTable + sizeof(uint32_t)*2; 5585ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* SortedIdTable = BufBeg + ReadLE32(SortedIdTableOffset); 559cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(SortedIdTable >= BufBeg && SortedIdTable < BufEnd)) { 56072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(false && "Invalid PTH file."); 56172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return 0; // FIXME: Proper error diagnostic? 56272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 56372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 5646183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 5655ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NumIds = ReadLE32(IData); 566cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 5676183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 5686183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 5696183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 570cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek IdentifierInfo** PerIDCache = 0; 5716183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 572cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (NumIds) { 573cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek PerIDCache = (IdentifierInfo**)calloc(NumIds, sizeof(*PerIDCache)); 574cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!PerIDCache) { 575cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek assert(false && "Could not allocate Persistent ID cache."); 576cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 577cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 5786183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 579cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 58072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Create the new PTHManager. 58172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, 58272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek SortedIdTable, NumIds); 5830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 58477ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris LattnerIdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) { 5850c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 58677ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner const unsigned char* TableEntry = IdDataTable + sizeof(uint32_t)*PersistentID; 587da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDData = 5885ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner (const unsigned char*)Buf->getBufferStart() + ReadLE32(TableEntry); 589da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(IDData < (const unsigned char*)Buf->getBufferEnd()); 5900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 59172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Allocate the object. 592da9d61c96c412f6babc7f824152609562f302388Chris Lattner std::pair<IdentifierInfo,const unsigned char*> *Mem = 593da9d61c96c412f6babc7f824152609562f302388Chris Lattner Alloc.Allocate<std::pair<IdentifierInfo,const unsigned char*> >(); 59472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 59572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek Mem->second = IDData; 596ea9c26b3dbd74a1497f5609ae6e19a85f42b6073Ted Kremenek IdentifierInfo *II = new ((void*) Mem) IdentifierInfo(); 5970c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 59872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Store the new IdentifierInfo in the cache. 59977ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner PerIDCache[PersistentID] = II; 6000c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 6010c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 6020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 60372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekIdentifierInfo* PTHManager::get(const char *NameStart, const char *NameEnd) { 60472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned min = 0; 60572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned max = NumIds; 6061b5285e1ba31975864da356b2ed927e87670e654Chris Lattner unsigned Len = NameEnd - NameStart; 60772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 60872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek do { 60972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned i = (max - min) / 2 + min; 6101b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = SortedIdTable + (i * 4); 61172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 61272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Read the persistentID. 6135ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned perID = ReadLE32(Ptr); 61472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 61572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Get the IdentifierInfo. 61672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IdentifierInfo* II = GetIdentifierInfo(perID); 61772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 61872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // First compare the lengths. 61972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned IILen = II->getLength(); 6201b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len < IILen) goto IsLess; 6211b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len > IILen) goto IsGreater; 62272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 62372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Now compare the strings! 62472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek { 6251b5285e1ba31975864da356b2ed927e87670e654Chris Lattner signed comp = strncmp(NameStart, II->getName(), Len); 62672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (comp < 0) goto IsLess; 62772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (comp > 0) goto IsGreater; 62872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 62972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // We found a match! 63072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return II; 63172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 63272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IsGreater: 63372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (i == min) break; 63472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek min = i; 63572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek continue; 63672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 63772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IsLess: 63872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek max = i; 63972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(!(max == min) || (min == i)); 64072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 641e1deaac73379eeb9864215c7979f6005ebd74cefTed Kremenek while (min != max); 64272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 64372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return 0; 64472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek} 64572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 64672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 647f056d92e182cbe4f62c8d14102544dc38066dabcChris LattnerPTHLexer *PTHManager::CreateLexer(FileID FID) { 648f056d92e182cbe4f62c8d14102544dc38066dabcChris Lattner const FileEntry *FE = PP->getSourceManager().getFileEntryForID(FID); 6490c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 6500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 6510c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 6520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 6530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 6540c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 6552b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner PTHFileLookup::Val FileData = ((PTHFileLookup*)FileLookup)->Lookup(FE); 6560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 657fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek if (!FileData.isValid()) // No tokens available. 6580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 6590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 660da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *BufStart = (const unsigned char *)Buf->getBufferStart(); 6610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 662da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* data = BufStart + FileData.getTokenOffset(); 663268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 664268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 665da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* ppcond = BufStart + FileData.getPPCondOffset(); 6665ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(ppcond); 6671b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) ppcond = 0; 66832a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 66932a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // Get the location of the spelling table. 670da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* spellingTable = BufStart + FileData.getSpellingOffset(); 67132a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 6725ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Len = ReadLE32(spellingTable); 6731b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) spellingTable = 0; 674b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 675da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(data < (const unsigned char*)Buf->getBufferEnd()); 6765f074266cc59563036c40516c814d63825723e20Ted Kremenek 6775f074266cc59563036c40516c814d63825723e20Ted Kremenek // Create the SpellingSearch object for this FileID. 6781b5285e1ba31975864da356b2ed927e87670e654Chris Lattner PTHSpellingSearch* ss = new PTHSpellingSearch(*this, Len, spellingTable); 6792b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner SpellingMap[FID] = ss; 6805f074266cc59563036c40516c814d63825723e20Ted Kremenek 68172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(PP && "No preprocessor set yet!"); 6822b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return new PTHLexer(*PP, FID, data, ppcond, *ss, *this); 6830c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 684