PTHLexer.cpp revision 4adc71ae2cfc190f8d2cf58876e2a7893aa74ee0
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) { 44fbc33388c199d6f731170bf55719d57373a09c1fChris Lattner // Hosts that directly support little-endian 32-bit loads can just 45fbc33388c199d6f731170bf55719d57373a09c1fChris Lattner // use them. Big-endian hosts need a bswap. 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); 104863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner 105d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner Tok.setIdentifierInfo(II); 106863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner 107863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // Change the kind of this identifier to the appropriate token kind, e.g. 108863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner // turning "for" into a keyword. 109863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner Tok.setKind(II->getTokenID()); 110863c486fcb6162495a94fddf7ac8409de2638995Chris Lattner 111d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner if (II->isHandleIdentifierCase()) 112d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner PP->HandleIdentifier(Tok); 113d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner return; 114d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner } 115d0a69696acca62798dfc8b98f97c92bfa7fa0490Chris Lattner 116866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 117866bdf74547efe32c320554837ffce00fcc084feTed Kremenek // Process the token. 118866bdf74547efe32c320554837ffce00fcc084feTed Kremenek //===--------------------------------------==// 1195f074266cc59563036c40516c814d63825723e20Ted Kremenek#if 0 1205f074266cc59563036c40516c814d63825723e20Ted Kremenek SourceManager& SM = PP->getSourceManager(); 1215f074266cc59563036c40516c814d63825723e20Ted Kremenek llvm::cerr << SM.getFileEntryForID(FileID)->getName() 1225f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalLineNumber(Tok.getLocation()) 1235f074266cc59563036c40516c814d63825723e20Ted Kremenek << ':' << SM.getLogicalColumnNumber(Tok.getLocation()) 1245f074266cc59563036c40516c814d63825723e20Ted Kremenek << '\n'; 1255f074266cc59563036c40516c814d63825723e20Ted Kremenek#endif 12689d7ee9619d2dbdfa8d956a695c612a104a92cadTed Kremenek 127898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eof) { 128e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Save the end-of-file token. 129e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek EofToken = Tok; 130e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 131cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek Preprocessor *PPCache = PP; 13259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 13359d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!ParsingPreprocessorDirective); 13459d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 13559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 13659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek // FIXME: Issue diagnostics similar to Lexer. 13759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->HandleEndOfFile(Tok, false)) 138d6f53dc4951aace69014619761760addac9e59ecTed Kremenek return; 13959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek 140cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek assert(PPCache && "Raw buffer::LexEndOfFile should return a token"); 141cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek return PPCache->Lex(Tok); 142cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek } 143d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 144898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::hash && Tok.isAtStartOfLine()) { 14559d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek LastHashTokPtr = CurPtr - DISK_TOKEN_SIZE; 14659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(!LexingRawMode); 14759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek PP->HandleDirective(Tok); 148d6f53dc4951aace69014619761760addac9e59ecTed Kremenek 14959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek if (PP->isCurrentLexer(this)) 15059d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek goto LexNextToken; 151e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 15259d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return PP->Lex(Tok); 153e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek } 154e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 155898a0bb1972efb6e03cb1151412ec7392cef07deChris Lattner if (TKind == tok::eom) { 15659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek assert(ParsingPreprocessorDirective); 15759d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek ParsingPreprocessorDirective = false; 15859d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek return; 15959d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek } 160274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek 16159d08cb672136322375e5400578ee1fbd0947de2Ted Kremenek MIOpt.ReadToken(); 162cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek} 163cd4e2aecde5bb7810715d5d5a88ac63ce7946f34Ted Kremenek 164e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// FIXME: We can just grab the last token instead of storing a copy 165e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek// into EofToken. 16659d08cb672136322375e5400578ee1fbd0947de2Ted Kremenekvoid PTHLexer::getEOF(Token& Tok) { 167defb7094c835998bb821e894253287625ce8c74dTed Kremenek assert(EofToken.is(tok::eof)); 1680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Tok = EofToken; 169274b20863a728cc6a31ee75c670e3733600c1531Ted Kremenek} 17017ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek 17117ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenekvoid PTHLexer::DiscardToEndOfLine() { 17217ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek assert(ParsingPreprocessorDirective && ParsingFilename == false && 17317ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek "Must be in a preprocessing directive!"); 1744d35da2e41941965bbee8ed7e8c30e7c21000d71Ted Kremenek 175e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // We assume that if the preprocessor wishes to discard to the end of 176e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // the line that it also means to end the current preprocessor directive. 177e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek ParsingPreprocessorDirective = false; 178e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 17974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip tokens by only peeking at their token kind and the flags. 18074c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // We don't need to actually reconstruct full tokens from the token buffer. 18174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // This saves some copies and it also reduces IdentifierInfo* lookup. 182da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* p = CurPtr; 18374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek while (1) { 18474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token kind. Are we at the end of the file? 18574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek tok::TokenKind x = (tok::TokenKind) (uint8_t) *p; 18674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek if (x == tok::eof) break; 187e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 18874c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Read the token flags. Are we at the start of the next line? 18974c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek Token::TokenFlags y = (Token::TokenFlags) (uint8_t) p[1]; 19080d2f3059326f99ebf7c867db1c7f106ec9485f5Ted Kremenek if (y & Token::StartOfLine) break; 19174c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 19274c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek // Skip to the next token. 19374c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek p += DISK_TOKEN_SIZE; 19474c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek } 19574c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek 19674c3e6e5e95af08096aab415d1ce15f15ffff02aTed Kremenek CurPtr = p; 19717ff58a63197b398ae52697b088dc0fb8b255519Ted Kremenek} 1980c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 199268ee7016a2811803989487c0ad3799486092c63Ted Kremenek/// SkipBlock - Used by Preprocessor to skip the current conditional block. 200268ee7016a2811803989487c0ad3799486092c63Ted Kremenekbool PTHLexer::SkipBlock() { 201268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(CurPPCondPtr && "No cached PP conditional information."); 202268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(LastHashTokPtr && "No known '#' token."); 203268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 204da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryI = 0; 205268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t Offset; 206268ee7016a2811803989487c0ad3799486092c63Ted Kremenek uint32_t TableIdx; 207268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 208268ee7016a2811803989487c0ad3799486092c63Ted Kremenek do { 20941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the token offset from the side-table. 2105ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Offset = ReadLE32(CurPPCondPtr); 21141a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21241a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read the target table index from the side-table. 2135ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(CurPPCondPtr); 21441a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Compute the actual memory address of the '#' token data for this entry. 21641a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = TokBuf + Offset; 21741a2660377d215d004fe413c03874bd066b5384cTed Kremenek 21841a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Optmization: "Sibling jumping". #if...#else...#endif blocks can 21941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // contain nested blocks. In the side-table we can jump over these 22041a2660377d215d004fe413c03874bd066b5384cTed Kremenek // nested blocks instead of doing a linear search if the next "sibling" 22141a2660377d215d004fe413c03874bd066b5384cTed Kremenek // entry is not at a location greater than LastHashTokPtr. 22241a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryI < LastHashTokPtr && TableIdx) { 22341a2660377d215d004fe413c03874bd066b5384cTed Kremenek // In the side-table we are still at an entry for a '#' token that 22441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // is earlier than the last one we saw. Check if the location we would 22541a2660377d215d004fe413c03874bd066b5384cTed Kremenek // stride gets us closer. 226da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = 227da9d61c96c412f6babc7f824152609562f302388Chris Lattner PPCond + TableIdx*(sizeof(uint32_t)*2); 22841a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 22941a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Read where we should jump to. 2305ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TmpOffset = ReadLE32(NextPPCondPtr); 231da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* HashEntryJ = TokBuf + TmpOffset; 23241a2660377d215d004fe413c03874bd066b5384cTed Kremenek 23341a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (HashEntryJ <= LastHashTokPtr) { 23441a2660377d215d004fe413c03874bd066b5384cTed Kremenek // Jump directly to the next entry in the side table. 23541a2660377d215d004fe413c03874bd066b5384cTed Kremenek HashEntryI = HashEntryJ; 23641a2660377d215d004fe413c03874bd066b5384cTed Kremenek Offset = TmpOffset; 2375ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner TableIdx = ReadLE32(NextPPCondPtr); 23841a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPPCondPtr = NextPPCondPtr; 23941a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 24041a2660377d215d004fe413c03874bd066b5384cTed Kremenek } 241268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 24241a2660377d215d004fe413c03874bd066b5384cTed Kremenek while (HashEntryI < LastHashTokPtr); 24341a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(HashEntryI == LastHashTokPtr && "No PP-cond entry found for '#'"); 244268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(TableIdx && "No jumping from #endifs."); 245268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 246268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update our side-table iterator. 247da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* NextPPCondPtr = PPCond + TableIdx*(sizeof(uint32_t)*2); 248268ee7016a2811803989487c0ad3799486092c63Ted Kremenek assert(NextPPCondPtr >= CurPPCondPtr); 249268ee7016a2811803989487c0ad3799486092c63Ted Kremenek CurPPCondPtr = NextPPCondPtr; 250268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 251268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Read where we should jump to. 2525ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner HashEntryI = TokBuf + ReadLE32(NextPPCondPtr); 2535ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NextIdx = ReadLE32(NextPPCondPtr); 254268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 255268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // By construction NextIdx will be zero if this is a #endif. This is useful 256268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // to know to obviate lexing another token. 257268ee7016a2811803989487c0ad3799486092c63Ted Kremenek bool isEndif = NextIdx == 0; 258268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 259268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // This case can occur when we see something like this: 260268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 261268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #if ... 262268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // /* a comment or nothing */ 263268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // #elif 264268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // 265268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // If we are skipping the first #if block it will be the case that CurPtr 266268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // already points 'elif'. Just return. 267268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 26841a2660377d215d004fe413c03874bd066b5384cTed Kremenek if (CurPtr > HashEntryI) { 26941a2660377d215d004fe413c03874bd066b5384cTed Kremenek assert(CurPtr == HashEntryI + DISK_TOKEN_SIZE); 270268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 271268ee7016a2811803989487c0ad3799486092c63Ted Kremenek if (isEndif) 272e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE*2; 273268ee7016a2811803989487c0ad3799486092c63Ted Kremenek else 27441a2660377d215d004fe413c03874bd066b5384cTed Kremenek LastHashTokPtr = HashEntryI; 275268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 276268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 277268ee7016a2811803989487c0ad3799486092c63Ted Kremenek } 278268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 279268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Otherwise, we need to advance. Update CurPtr to point to the '#' token. 28041a2660377d215d004fe413c03874bd066b5384cTed Kremenek CurPtr = HashEntryI; 281268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 282268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Update the location of the last observed '#'. This is useful if we 283268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // are skipping multiple blocks. 284268ee7016a2811803989487c0ad3799486092c63Ted Kremenek LastHashTokPtr = CurPtr; 285268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 286e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek // Skip the '#' token. 287da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(((tok::TokenKind)*CurPtr) == tok::hash); 288e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek CurPtr += DISK_TOKEN_SIZE; 289e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek 290268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Did we reach a #endif? If so, go ahead and consume that token as well. 291e5680f3cd678014cf0872d34726dc804b0cbbdd4Ted Kremenek if (isEndif) { CurPtr += DISK_TOKEN_SIZE*2; } 292268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 293268ee7016a2811803989487c0ad3799486092c63Ted Kremenek return isEndif; 294268ee7016a2811803989487c0ad3799486092c63Ted Kremenek} 295268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 29630a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed KremenekSourceLocation PTHLexer::getSourceLocation() { 2971b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // getSourceLocation is not on the hot path. It is used to get the location 2981b5285e1ba31975864da356b2ed927e87670e654Chris Lattner // of the next token when transitioning back to this lexer when done 29930a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // handling a #included file. Just read the necessary data from the token 30030a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // data buffer to construct the SourceLocation object. 30130a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek // NOTE: This is a virtual function; hence it is defined out-of-line. 302b248d53f2599d8e7b53b144b713e163ca521ffcaTed Kremenek const unsigned char *OffsetPtr = CurPtr + (DISK_TOKEN_SIZE - 4); 3035ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Offset = ReadLE32(OffsetPtr); 3041b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return FileStartLoc.getFileLocWithOffset(Offset); 30530a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek} 30630a12ec2a7f331d9e08acabe7cda853aaa7ba54bTed Kremenek 3075f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 3085f074266cc59563036c40516c814d63825723e20Ted Kremenek// getSpelling() - Use cached data in PTH files for getSpelling(). 3095f074266cc59563036c40516c814d63825723e20Ted Kremenek//===----------------------------------------------------------------------===// 3105f074266cc59563036c40516c814d63825723e20Ted Kremenek 3112b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHManager::getSpelling(FileID FID, unsigned FPos, 3122b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner const char *&Buffer) { 3132b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner llvm::DenseMap<FileID, PTHSpellingSearch*>::iterator I =SpellingMap.find(FID); 3145f074266cc59563036c40516c814d63825723e20Ted Kremenek 3155f074266cc59563036c40516c814d63825723e20Ted Kremenek if (I == SpellingMap.end()) 3161b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return 0; 317f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 3182b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return I->second->getSpellingBinarySearch(FPos, Buffer); 3192b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner} 3202b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 3212b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHManager::getSpelling(SourceLocation Loc, const char *&Buffer) { 3226b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner SourceManager &SM = PP->getSourceManager(); 3236b7b84036126a8f2a3e312cfec0a9a4f8ae9d8edChris Lattner Loc = SM.getSpellingLoc(Loc); 324de7aeefc5573d669ed476d7bda7a8940d3bcadb7Chris Lattner std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc); 3252b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return getSpelling(LocInfo.first, LocInfo.second, Buffer); 3265f074266cc59563036c40516c814d63825723e20Ted Kremenek} 3275f074266cc59563036c40516c814d63825723e20Ted Kremenek 3285f074266cc59563036c40516c814d63825723e20Ted Kremenekunsigned PTHManager::getSpellingAtPTHOffset(unsigned PTHOffset, 329da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char *&Buffer) { 3301b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(PTHOffset < Buf->getBufferSize()); 3311b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char* Ptr = 3321b5285e1ba31975864da356b2ed927e87670e654Chris Lattner (const unsigned char*)Buf->getBufferStart() + PTHOffset; 33332a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 33432a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // The string is prefixed by 16 bits for its length, followed by the string 33532a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // itself. 3365ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned Len = ReadUnalignedLE16(Ptr); 3371b5285e1ba31975864da356b2ed927e87670e654Chris Lattner Buffer = (const char *)Ptr; 3381b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return Len; 33932a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek} 34032a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3411b5285e1ba31975864da356b2ed927e87670e654Chris Lattnerunsigned PTHSpellingSearch::getSpellingLinearSearch(unsigned FPos, 3425f074266cc59563036c40516c814d63825723e20Ted Kremenek const char *&Buffer) { 3431b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = LinearItr; 3441b5285e1ba31975864da356b2ed927e87670e654Chris Lattner unsigned Len = 0; 3455f074266cc59563036c40516c814d63825723e20Ted Kremenek 3461b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Ptr == TableEnd) 3471b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return getSpellingBinarySearch(FPos, Buffer); 3485f074266cc59563036c40516c814d63825723e20Ted Kremenek 3495f074266cc59563036c40516c814d63825723e20Ted Kremenek do { 3505ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokOffset = ReadLE32(Ptr); 35132a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3521b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset > FPos) 3531b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return getSpellingBinarySearch(FPos, Buffer); 35432a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 35532a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // Did we find a matching token offset for this spelling? 3561b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset == FPos) { 3575ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingPTHOffset = ReadLE32(Ptr); 3581b5285e1ba31975864da356b2ed927e87670e654Chris Lattner Len = PTHMgr.getSpellingAtPTHOffset(SpellingPTHOffset, Buffer); 35932a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek break; 36032a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek } 3611b5285e1ba31975864da356b2ed927e87670e654Chris Lattner } while (Ptr != TableEnd); 36232a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 3631b5285e1ba31975864da356b2ed927e87670e654Chris Lattner LinearItr = Ptr; 3641b5285e1ba31975864da356b2ed927e87670e654Chris Lattner return Len; 365b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek} 366b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 367da9d61c96c412f6babc7f824152609562f302388Chris Lattner 3681b5285e1ba31975864da356b2ed927e87670e654Chris Lattnerunsigned PTHSpellingSearch::getSpellingBinarySearch(unsigned FPos, 369da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char *&Buffer) { 3705f074266cc59563036c40516c814d63825723e20Ted Kremenek 371f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek assert((TableEnd - TableBeg) % SpellingEntrySize == 0); 3721b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(TableEnd >= TableBeg); 373f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 374f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek if (TableEnd == TableBeg) 375f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek return 0; 376f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek 3775f074266cc59563036c40516c814d63825723e20Ted Kremenek unsigned min = 0; 3781b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *tb = TableBeg; 379f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek unsigned max = NumSpellings; 3805f074266cc59563036c40516c814d63825723e20Ted Kremenek 381f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek do { 3825f074266cc59563036c40516c814d63825723e20Ted Kremenek unsigned i = (max - min) / 2 + min; 3831b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = tb + (i * SpellingEntrySize); 3845f074266cc59563036c40516c814d63825723e20Ted Kremenek 3855ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokOffset = ReadLE32(Ptr); 3861b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset > FPos) { 3875f074266cc59563036c40516c814d63825723e20Ted Kremenek max = i; 388f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek assert(!(max == min) || (min == i)); 3895f074266cc59563036c40516c814d63825723e20Ted Kremenek continue; 3905f074266cc59563036c40516c814d63825723e20Ted Kremenek } 3915f074266cc59563036c40516c814d63825723e20Ted Kremenek 3921b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (TokOffset < FPos) { 3937bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek if (i == min) 3947bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek break; 3957bd88aa620406ab99547169b973de085785a0ca2Ted Kremenek 3965f074266cc59563036c40516c814d63825723e20Ted Kremenek min = i; 3975f074266cc59563036c40516c814d63825723e20Ted Kremenek continue; 3985f074266cc59563036c40516c814d63825723e20Ted Kremenek } 3995f074266cc59563036c40516c814d63825723e20Ted Kremenek 4005ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingPTHOffset = ReadLE32(Ptr); 4015f074266cc59563036c40516c814d63825723e20Ted Kremenek return PTHMgr.getSpellingAtPTHOffset(SpellingPTHOffset, Buffer); 4025f074266cc59563036c40516c814d63825723e20Ted Kremenek } 403f02f6f0ee3e05b958bcf67f00f4503671d67eccdTed Kremenek while (min != max); 4045f074266cc59563036c40516c814d63825723e20Ted Kremenek 4055f074266cc59563036c40516c814d63825723e20Ted Kremenek return 0; 4065f074266cc59563036c40516c814d63825723e20Ted Kremenek} 4075f074266cc59563036c40516c814d63825723e20Ted Kremenek 4082b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattnerunsigned PTHLexer::getSpelling(SourceLocation Loc, const char *&Buffer) { 4092b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner SourceManager &SM = PP->getSourceManager(); 410de7aeefc5573d669ed476d7bda7a8940d3bcadb7Chris Lattner std::pair<FileID, unsigned> LocInfo = SM.getDecomposedSpellingLoc(Loc); 4112b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner 4122b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner FileID FID = LocInfo.first; 4132b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner unsigned FPos = LocInfo.second; 4145f074266cc59563036c40516c814d63825723e20Ted Kremenek 4152b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner if (FID == getFileID()) 4162b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return MySpellingSrch.getSpellingLinearSearch(FPos, Buffer); 4172b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return PTHMgr.getSpelling(FID, FPos, Buffer); 4185f074266cc59563036c40516c814d63825723e20Ted Kremenek} 4195f074266cc59563036c40516c814d63825723e20Ted Kremenek 4200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4210c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// Internal Data Structures for PTH file lookup and resolving identifiers. 4220c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4230c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4240c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4250c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// PTHFileLookup - This internal data structure is used by the PTHManager 4260c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// to map from FileEntry objects managed by FileManager to offsets within 4270c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek/// the PTH file. 4280c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremeneknamespace { 4290c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekclass VISIBILITY_HIDDEN PTHFileLookup { 4300c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 4310c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek class Val { 432fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t TokenOff; 433fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t PPCondOff; 434b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t SpellingOff; 4350c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek public: 436fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek Val() : TokenOff(~0) {} 437b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek Val(uint32_t toff, uint32_t poff, uint32_t soff) 438b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek : TokenOff(toff), PPCondOff(poff), SpellingOff(soff) {} 4390c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4401b5285e1ba31975864da356b2ed927e87670e654Chris Lattner bool isValid() const { return TokenOff != ~((uint32_t)0); } 4411b5285e1ba31975864da356b2ed927e87670e654Chris Lattner 442fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek uint32_t getTokenOffset() const { 4431b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 444fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return TokenOff; 4450c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 447b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t getPPCondOffset() const { 4481b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 449fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek return PPCondOff; 450fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek } 451fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek 452b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek uint32_t getSpellingOffset() const { 4531b5285e1ba31975864da356b2ed927e87670e654Chris Lattner assert(isValid() && "PTHFileLookup entry initialized."); 454b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek return SpellingOff; 455b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek } 4560c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek }; 4570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekprivate: 4590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::StringMap<Val> FileMap; 4600c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenekpublic: 4620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek PTHFileLookup() {}; 4630c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 464cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek bool isEmpty() const { 465cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return FileMap.empty(); 466cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 467cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 4680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek Val Lookup(const FileEntry* FE) { 4690c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek const char* s = FE->getName(); 4700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek unsigned size = strlen(s); 4710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return FileMap.GetOrCreateValue(s, s+size).getValue(); 4720c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 474da9d61c96c412f6babc7f824152609562f302388Chris Lattner void ReadTable(const unsigned char* D) { 4755ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t N = ReadLE32(D); // Read the length of the table. 4760c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4770c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek for ( ; N > 0; --N) { // The rest of the data is the table itself. 4785ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(D); 479da9d61c96c412f6babc7f824152609562f302388Chris Lattner const char* s = (const char *)D; 4801b5285e1ba31975864da356b2ed927e87670e654Chris Lattner D += Len; 481b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 4825ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t TokenOff = ReadLE32(D); 4835ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t PPCondOff = ReadLE32(D); 4845ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t SpellingOff = ReadLE32(D); 485b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 4861b5285e1ba31975864da356b2ed927e87670e654Chris Lattner FileMap.GetOrCreateValue(s, s+Len).getValue() = 487b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek Val(TokenOff, PPCondOff, SpellingOff); 4880c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4890c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 4900c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek}; 4910c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} // end anonymous namespace 4920c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4930c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4940c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek// PTHManager methods. 4950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek//===----------------------------------------------------------------------===// 4960c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 4970c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::PTHManager(const llvm::MemoryBuffer* buf, void* fileLookup, 498da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* idDataTable, 499da9d61c96c412f6babc7f824152609562f302388Chris Lattner IdentifierInfo** perIDCache, 500da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* sortedIdTable, unsigned numIds) 5016183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek: Buf(buf), PerIDCache(perIDCache), FileLookup(fileLookup), 50272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IdDataTable(idDataTable), SortedIdTable(sortedIdTable), 50372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek NumIds(numIds), PP(0) {} 5040c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5050c6a77bc1f52f282a969538f139ebde429076ed3Ted KremenekPTHManager::~PTHManager() { 5060c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete Buf; 5070c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek delete (PTHFileLookup*) FileLookup; 5080e50b6e7c104d00614baa3d80df62f1630a94d9cTed Kremenek free(PerIDCache); 5090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 5100c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 51172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekPTHManager* PTHManager::Create(const std::string& file) { 5120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Memory map the PTH file. 5130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<llvm::MemoryBuffer> 5140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek File(llvm::MemoryBuffer::getFile(file.c_str())); 5150c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5160c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!File) 5170c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 5180c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5190c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the buffer ranges and check if there are at least three 32-bit 5200c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // words at the end of the file. 521da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufBeg = (unsigned char*)File->getBufferStart(); 522da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* BufEnd = (unsigned char*)File->getBufferEnd(); 523e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek 524e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek // Check the prologue of the file. 5254adc71ae2cfc190f8d2cf58876e2a7893aa74ee0Ted Kremenek if ((BufEnd - BufBeg) < (signed) (sizeof("cfe-pth") + 3 + 4) || 526e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek memcmp(BufBeg, "cfe-pth", sizeof("cfe-pth") - 1) != 0) 527e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 5280c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 52967d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek // Read the PTH version. 530e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek const unsigned char *p = BufBeg + (sizeof("cfe-pth") - 1); 53167d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek unsigned Version = ReadLE32(p); 53267d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek 53367d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek if (Version != PTHManager::Version) 53467d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek return 0; 53567d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek 53667d15050bbea16ae256e204ecd464f2e454c3c99Ted Kremenek // Compute the address of the index table at the end of the PTH file. 537e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek const unsigned char *EndTable = BufBeg + ReadLE32(p); 538e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek 539e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek if (EndTable >= BufEnd) 540e1b6498c41b94c3bc5cede17b0702282543385efTed Kremenek return 0; 5410c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5420c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Construct the file lookup table. This will be used for mapping from 5430c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // FileEntry*'s to cached tokens. 544da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* FileTableOffset = EndTable + sizeof(uint32_t)*3; 5455ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* FileTable = BufBeg + ReadLE32(FileTableOffset); 5460c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5470c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!(FileTable > BufBeg && FileTable < BufEnd)) { 5480c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5490c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5500c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5510c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5520c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek llvm::OwningPtr<PTHFileLookup> FL(new PTHFileLookup()); 5530c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek FL->ReadTable(FileTable); 554cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 555cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (FL->isEmpty()) 556cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 5570c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 5580c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Get the location of the table mapping from persistent ids to the 5590c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // data needed to reconstruct identifiers. 560da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDTableOffset = EndTable + sizeof(uint32_t)*1; 5615ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* IData = BufBeg + ReadLE32(IDTableOffset); 562cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 563cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(IData >= BufBeg && IData < BufEnd)) { 5640c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek assert(false && "Invalid PTH file."); 5650c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; // FIXME: Proper error diagnostic? 5660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek } 5670c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 56872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Get the location of the lexigraphically-sorted table of persistent IDs. 569da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* SortedIdTableOffset = EndTable + sizeof(uint32_t)*2; 5705ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner const unsigned char* SortedIdTable = BufBeg + ReadLE32(SortedIdTableOffset); 571cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!(SortedIdTable >= BufBeg && SortedIdTable < BufEnd)) { 57272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(false && "Invalid PTH file."); 57372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return 0; // FIXME: Proper error diagnostic? 57472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 57572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 5766183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Get the number of IdentifierInfos and pre-allocate the identifier cache. 5775ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t NumIds = ReadLE32(IData); 578cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 5796183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // Pre-allocate the peristent ID -> IdentifierInfo* cache. We use calloc() 5806183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // so that we in the best case only zero out memory once when the OS returns 5816183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek // us new pages. 582cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek IdentifierInfo** PerIDCache = 0; 5836183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek 584cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (NumIds) { 585cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek PerIDCache = (IdentifierInfo**)calloc(NumIds, sizeof(*PerIDCache)); 586cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek if (!PerIDCache) { 587cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek assert(false && "Could not allocate Persistent ID cache."); 588cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek return 0; 589cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek } 5906183e4815a4019e97ad01bd880f12355599b75fdTed Kremenek } 591cdd8f2153e18796e9e2a126ebcbd4f3e1bd7135bTed Kremenek 59272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Create the new PTHManager. 59372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return new PTHManager(File.take(), FL.take(), IData, PerIDCache, 59472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek SortedIdTable, NumIds); 5950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 59677ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris LattnerIdentifierInfo* PTHManager::LazilyCreateIdentifierInfo(unsigned PersistentID) { 5970c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Look in the PTH file for the string data for the IdentifierInfo object. 59877ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner const unsigned char* TableEntry = IdDataTable + sizeof(uint32_t)*PersistentID; 599da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* IDData = 6005ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner (const unsigned char*)Buf->getBufferStart() + ReadLE32(TableEntry); 601da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(IDData < (const unsigned char*)Buf->getBufferEnd()); 6020c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 60372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Allocate the object. 604da9d61c96c412f6babc7f824152609562f302388Chris Lattner std::pair<IdentifierInfo,const unsigned char*> *Mem = 605da9d61c96c412f6babc7f824152609562f302388Chris Lattner Alloc.Allocate<std::pair<IdentifierInfo,const unsigned char*> >(); 60672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 60772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek Mem->second = IDData; 608ea9c26b3dbd74a1497f5609ae6e19a85f42b6073Ted Kremenek IdentifierInfo *II = new ((void*) Mem) IdentifierInfo(); 6090c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 61072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Store the new IdentifierInfo in the cache. 61177ecb3a28f21496ecfdbb3d5f5b66b0d2abf48c9Chris Lattner PerIDCache[PersistentID] = II; 6120c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return II; 6130c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 6140c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 61572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted KremenekIdentifierInfo* PTHManager::get(const char *NameStart, const char *NameEnd) { 61672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned min = 0; 61772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned max = NumIds; 6181b5285e1ba31975864da356b2ed927e87670e654Chris Lattner unsigned Len = NameEnd - NameStart; 61972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 62072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek do { 62172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned i = (max - min) / 2 + min; 6221b5285e1ba31975864da356b2ed927e87670e654Chris Lattner const unsigned char *Ptr = SortedIdTable + (i * 4); 62372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 62472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Read the persistentID. 6255ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner unsigned perID = ReadLE32(Ptr); 62672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 62772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Get the IdentifierInfo. 62872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IdentifierInfo* II = GetIdentifierInfo(perID); 62972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 63072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // First compare the lengths. 63172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek unsigned IILen = II->getLength(); 6321b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len < IILen) goto IsLess; 6331b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len > IILen) goto IsGreater; 63472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 63572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // Now compare the strings! 63672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek { 6371b5285e1ba31975864da356b2ed927e87670e654Chris Lattner signed comp = strncmp(NameStart, II->getName(), Len); 63872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (comp < 0) goto IsLess; 63972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (comp > 0) goto IsGreater; 64072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 64172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek // We found a match! 64272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return II; 64372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 64472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IsGreater: 64572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek if (i == min) break; 64672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek min = i; 64772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek continue; 64872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 64972b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek IsLess: 65072b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek max = i; 65172b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(!(max == min) || (min == i)); 65272b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek } 653e1deaac73379eeb9864215c7979f6005ebd74cefTed Kremenek while (min != max); 65472b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 65572b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek return 0; 65672b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek} 65772b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 65872b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek 659f056d92e182cbe4f62c8d14102544dc38066dabcChris LattnerPTHLexer *PTHManager::CreateLexer(FileID FID) { 660f056d92e182cbe4f62c8d14102544dc38066dabcChris Lattner const FileEntry *FE = PP->getSourceManager().getFileEntryForID(FID); 6610c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek if (!FE) 6620c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 6630c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 6640c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Lookup the FileEntry object in our file lookup data structure. It will 6650c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // return a variant that indicates whether or not there is an offset within 6660c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // the PTH file that contains cached tokens. 6672b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner PTHFileLookup::Val FileData = ((PTHFileLookup*)FileLookup)->Lookup(FE); 6680c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 669fb645b6547b75ddc2e3c7ab2126ad8beeefca62dTed Kremenek if (!FileData.isValid()) // No tokens available. 6700c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek return 0; 6710c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek 672da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char *BufStart = (const unsigned char *)Buf->getBufferStart(); 6730c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek // Compute the offset of the token data within the buffer. 674da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* data = BufStart + FileData.getTokenOffset(); 675268ee7016a2811803989487c0ad3799486092c63Ted Kremenek 676268ee7016a2811803989487c0ad3799486092c63Ted Kremenek // Get the location of pp-conditional table. 677da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* ppcond = BufStart + FileData.getPPCondOffset(); 6785ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner uint32_t Len = ReadLE32(ppcond); 6791b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) ppcond = 0; 68032a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 68132a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek // Get the location of the spelling table. 682da9d61c96c412f6babc7f824152609562f302388Chris Lattner const unsigned char* spellingTable = BufStart + FileData.getSpellingOffset(); 68332a8ad526f9bc00539f000a2dd1ac3e167db61c1Ted Kremenek 6845ff4317536dbd7f03332bb250c8b35ec04a6f5dbChris Lattner Len = ReadLE32(spellingTable); 6851b5285e1ba31975864da356b2ed927e87670e654Chris Lattner if (Len == 0) spellingTable = 0; 686b70e3dafb9618f34017061400dc19ac5e3539a6dTed Kremenek 687da9d61c96c412f6babc7f824152609562f302388Chris Lattner assert(data < (const unsigned char*)Buf->getBufferEnd()); 6885f074266cc59563036c40516c814d63825723e20Ted Kremenek 6895f074266cc59563036c40516c814d63825723e20Ted Kremenek // Create the SpellingSearch object for this FileID. 6901b5285e1ba31975864da356b2ed927e87670e654Chris Lattner PTHSpellingSearch* ss = new PTHSpellingSearch(*this, Len, spellingTable); 6912b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner SpellingMap[FID] = ss; 6925f074266cc59563036c40516c814d63825723e20Ted Kremenek 69372b1b15ee88aac0a63e2c1dc53fe22f5ab297b20Ted Kremenek assert(PP && "No preprocessor set yet!"); 6942b2453a7d8fe732561795431f39ceb2b2a832d84Chris Lattner return new PTHLexer(*PP, FID, data, ppcond, *ss, *this); 6950c6a77bc1f52f282a969538f139ebde429076ed3Ted Kremenek} 696