mirror of
https://github.com/reactos/CMake.git
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ded616bdad
If we are given a FIFO, for example, we cannot seek back after trying to read a Byte-Order-Mark. Closes: #16607
468 lines
13 KiB
C++
468 lines
13 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmListFileCache.h"
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#include "cmListFileLexer.h"
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#include "cmMessenger.h"
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#include "cmOutputConverter.h"
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#include "cmState.h"
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#include "cmSystemTools.h"
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#include "cmake.h"
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#include <algorithm>
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#include <assert.h>
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#include <cmConfigure.h>
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#include <sstream>
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struct cmListFileParser
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{
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cmListFileParser(cmListFile* lf, cmListFileBacktrace lfbt,
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cmMessenger* messenger, const char* filename);
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~cmListFileParser();
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void IssueFileOpenError(std::string const& text) const;
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void IssueError(std::string const& text) const;
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bool ParseFile();
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bool ParseFunction(const char* name, long line);
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bool AddArgument(cmListFileLexer_Token* token,
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cmListFileArgument::Delimiter delim);
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cmListFile* ListFile;
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cmListFileBacktrace Backtrace;
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cmMessenger* Messenger;
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const char* FileName;
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cmListFileLexer* Lexer;
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cmListFileFunction Function;
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enum
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{
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SeparationOkay,
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SeparationWarning,
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SeparationError
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} Separation;
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};
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cmListFileParser::cmListFileParser(cmListFile* lf, cmListFileBacktrace lfbt,
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cmMessenger* messenger,
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const char* filename)
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: ListFile(lf)
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, Backtrace(lfbt)
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, Messenger(messenger)
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, FileName(filename)
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, Lexer(cmListFileLexer_New())
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{
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}
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cmListFileParser::~cmListFileParser()
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{
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cmListFileLexer_Delete(this->Lexer);
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}
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void cmListFileParser::IssueFileOpenError(const std::string& text) const
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{
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this->Messenger->IssueMessage(cmake::FATAL_ERROR, text, this->Backtrace);
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}
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void cmListFileParser::IssueError(const std::string& text) const
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{
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cmListFileContext lfc;
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lfc.FilePath = this->FileName;
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lfc.Line = cmListFileLexer_GetCurrentLine(this->Lexer);
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cmListFileBacktrace lfbt = this->Backtrace;
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lfbt = lfbt.Push(lfc);
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this->Messenger->IssueMessage(cmake::FATAL_ERROR, text, lfbt);
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cmSystemTools::SetFatalErrorOccured();
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}
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bool cmListFileParser::ParseFile()
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{
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// Open the file.
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cmListFileLexer_BOM bom;
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if (!cmListFileLexer_SetFileName(this->Lexer, this->FileName, &bom)) {
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this->IssueFileOpenError("cmListFileCache: error can not open file.");
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return false;
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}
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if (bom == cmListFileLexer_BOM_Broken) {
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cmListFileLexer_SetFileName(this->Lexer, CM_NULLPTR, CM_NULLPTR);
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this->IssueFileOpenError("Error while reading Byte-Order-Mark. "
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"File not seekable?");
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return false;
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}
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// Verify the Byte-Order-Mark, if any.
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if (bom != cmListFileLexer_BOM_None && bom != cmListFileLexer_BOM_UTF8) {
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cmListFileLexer_SetFileName(this->Lexer, CM_NULLPTR, CM_NULLPTR);
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this->IssueFileOpenError(
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"File starts with a Byte-Order-Mark that is not UTF-8.");
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return false;
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}
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// Use a simple recursive-descent parser to process the token
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// stream.
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bool haveNewline = true;
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while (cmListFileLexer_Token* token = cmListFileLexer_Scan(this->Lexer)) {
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if (token->type == cmListFileLexer_Token_Space) {
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} else if (token->type == cmListFileLexer_Token_Newline) {
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haveNewline = true;
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} else if (token->type == cmListFileLexer_Token_CommentBracket) {
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haveNewline = false;
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} else if (token->type == cmListFileLexer_Token_Identifier) {
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if (haveNewline) {
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haveNewline = false;
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if (this->ParseFunction(token->text, token->line)) {
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this->ListFile->Functions.push_back(this->Function);
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} else {
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return false;
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}
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} else {
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std::ostringstream error;
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error << "Parse error. Expected a newline, got "
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<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
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<< " with text \"" << token->text << "\".";
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this->IssueError(error.str());
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return false;
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}
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} else {
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std::ostringstream error;
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error << "Parse error. Expected a command name, got "
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<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
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<< " with text \"" << token->text << "\".";
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this->IssueError(error.str());
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return false;
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}
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}
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return true;
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}
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bool cmListFile::ParseFile(const char* filename, cmMessenger* messenger,
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cmListFileBacktrace const& lfbt)
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{
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if (!cmSystemTools::FileExists(filename) ||
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cmSystemTools::FileIsDirectory(filename)) {
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return false;
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}
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bool parseError = false;
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{
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cmListFileParser parser(this, lfbt, messenger, filename);
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parseError = !parser.ParseFile();
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}
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return !parseError;
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}
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bool cmListFileParser::ParseFunction(const char* name, long line)
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{
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// Ininitialize a new function call.
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this->Function = cmListFileFunction();
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this->Function.Name = name;
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this->Function.Line = line;
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// Command name has already been parsed. Read the left paren.
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cmListFileLexer_Token* token;
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while ((token = cmListFileLexer_Scan(this->Lexer)) &&
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token->type == cmListFileLexer_Token_Space) {
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}
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if (!token) {
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std::ostringstream error;
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/* clang-format off */
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error << "Unexpected end of file.\n"
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<< "Parse error. Function missing opening \"(\".";
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/* clang-format on */
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this->IssueError(error.str());
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return false;
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}
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if (token->type != cmListFileLexer_Token_ParenLeft) {
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std::ostringstream error;
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error << "Parse error. Expected \"(\", got "
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<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
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<< " with text \"" << token->text << "\".";
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this->IssueError(error.str());
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return false;
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}
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// Arguments.
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unsigned long lastLine;
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unsigned long parenDepth = 0;
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this->Separation = SeparationOkay;
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while ((lastLine = cmListFileLexer_GetCurrentLine(this->Lexer),
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token = cmListFileLexer_Scan(this->Lexer))) {
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if (token->type == cmListFileLexer_Token_Space ||
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token->type == cmListFileLexer_Token_Newline) {
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this->Separation = SeparationOkay;
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continue;
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}
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if (token->type == cmListFileLexer_Token_ParenLeft) {
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parenDepth++;
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this->Separation = SeparationOkay;
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if (!this->AddArgument(token, cmListFileArgument::Unquoted)) {
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return false;
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}
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} else if (token->type == cmListFileLexer_Token_ParenRight) {
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if (parenDepth == 0) {
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return true;
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}
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parenDepth--;
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this->Separation = SeparationOkay;
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if (!this->AddArgument(token, cmListFileArgument::Unquoted)) {
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return false;
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}
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this->Separation = SeparationWarning;
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} else if (token->type == cmListFileLexer_Token_Identifier ||
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token->type == cmListFileLexer_Token_ArgumentUnquoted) {
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if (!this->AddArgument(token, cmListFileArgument::Unquoted)) {
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return false;
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}
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this->Separation = SeparationWarning;
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} else if (token->type == cmListFileLexer_Token_ArgumentQuoted) {
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if (!this->AddArgument(token, cmListFileArgument::Quoted)) {
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return false;
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}
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this->Separation = SeparationWarning;
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} else if (token->type == cmListFileLexer_Token_ArgumentBracket) {
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if (!this->AddArgument(token, cmListFileArgument::Bracket)) {
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return false;
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}
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this->Separation = SeparationError;
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} else if (token->type == cmListFileLexer_Token_CommentBracket) {
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this->Separation = SeparationError;
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} else {
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// Error.
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std::ostringstream error;
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error << "Parse error. Function missing ending \")\". "
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<< "Instead found "
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<< cmListFileLexer_GetTypeAsString(this->Lexer, token->type)
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<< " with text \"" << token->text << "\".";
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this->IssueError(error.str());
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return false;
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}
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}
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std::ostringstream error;
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cmListFileContext lfc;
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lfc.FilePath = this->FileName;
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lfc.Line = lastLine;
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cmListFileBacktrace lfbt = this->Backtrace;
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lfbt = lfbt.Push(lfc);
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error << "Parse error. Function missing ending \")\". "
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<< "End of file reached.";
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this->Messenger->IssueMessage(cmake::FATAL_ERROR, error.str(), lfbt);
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return false;
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}
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bool cmListFileParser::AddArgument(cmListFileLexer_Token* token,
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cmListFileArgument::Delimiter delim)
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{
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cmListFileArgument a(token->text, delim, token->line);
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this->Function.Arguments.push_back(a);
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if (this->Separation == SeparationOkay) {
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return true;
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}
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bool isError = (this->Separation == SeparationError ||
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delim == cmListFileArgument::Bracket);
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std::ostringstream m;
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cmListFileContext lfc;
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lfc.FilePath = this->FileName;
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lfc.Line = token->line;
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cmListFileBacktrace lfbt = this->Backtrace;
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lfbt = lfbt.Push(lfc);
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m << "Syntax " << (isError ? "Error" : "Warning") << " in cmake code at "
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<< "column " << token->column << "\n"
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<< "Argument not separated from preceding token by whitespace.";
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/* clang-format on */
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if (isError) {
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this->Messenger->IssueMessage(cmake::FATAL_ERROR, m.str(), lfbt);
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return false;
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}
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this->Messenger->IssueMessage(cmake::AUTHOR_WARNING, m.str(), lfbt);
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return true;
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}
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struct cmListFileBacktrace::Entry : public cmListFileContext
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{
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Entry(cmListFileContext const& lfc, Entry* up)
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: cmListFileContext(lfc)
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, Up(up)
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, RefCount(0)
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{
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if (this->Up) {
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this->Up->Ref();
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}
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}
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~Entry()
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{
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if (this->Up) {
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this->Up->Unref();
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}
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}
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void Ref() { ++this->RefCount; }
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void Unref()
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{
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if (--this->RefCount == 0) {
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delete this;
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}
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}
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Entry* Up;
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unsigned int RefCount;
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};
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cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot bottom, Entry* up,
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cmListFileContext const& lfc)
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: Bottom(bottom)
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, Cur(new Entry(lfc, up))
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{
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assert(this->Bottom.IsValid());
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this->Cur->Ref();
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}
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cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot bottom, Entry* cur)
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: Bottom(bottom)
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, Cur(cur)
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{
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if (this->Cur) {
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assert(this->Bottom.IsValid());
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this->Cur->Ref();
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}
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}
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cmListFileBacktrace::cmListFileBacktrace()
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: Bottom()
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, Cur(CM_NULLPTR)
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{
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}
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cmListFileBacktrace::cmListFileBacktrace(cmStateSnapshot snapshot)
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: Bottom(snapshot.GetCallStackBottom())
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, Cur(CM_NULLPTR)
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{
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}
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cmListFileBacktrace::cmListFileBacktrace(cmListFileBacktrace const& r)
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: Bottom(r.Bottom)
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, Cur(r.Cur)
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{
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if (this->Cur) {
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assert(this->Bottom.IsValid());
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this->Cur->Ref();
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}
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}
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cmListFileBacktrace& cmListFileBacktrace::operator=(
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cmListFileBacktrace const& r)
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{
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cmListFileBacktrace tmp(r);
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std::swap(this->Cur, tmp.Cur);
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std::swap(this->Bottom, tmp.Bottom);
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return *this;
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}
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cmListFileBacktrace::~cmListFileBacktrace()
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{
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if (this->Cur) {
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this->Cur->Unref();
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}
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}
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cmListFileBacktrace cmListFileBacktrace::Push(std::string const& file) const
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{
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// We are entering a file-level scope but have not yet reached
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// any specific line or command invocation within it. This context
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// is useful to print when it is at the top but otherwise can be
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// skipped during call stack printing.
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cmListFileContext lfc;
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lfc.FilePath = file;
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return cmListFileBacktrace(this->Bottom, this->Cur, lfc);
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}
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cmListFileBacktrace cmListFileBacktrace::Push(
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cmListFileContext const& lfc) const
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{
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return cmListFileBacktrace(this->Bottom, this->Cur, lfc);
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}
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cmListFileBacktrace cmListFileBacktrace::Pop() const
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{
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assert(this->Cur);
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return cmListFileBacktrace(this->Bottom, this->Cur->Up);
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}
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cmListFileContext const& cmListFileBacktrace::Top() const
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{
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if (this->Cur) {
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return *this->Cur;
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}
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static cmListFileContext const empty;
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return empty;
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}
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void cmListFileBacktrace::PrintTitle(std::ostream& out) const
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{
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if (!this->Cur) {
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return;
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}
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cmOutputConverter converter(this->Bottom);
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cmListFileContext lfc = *this->Cur;
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if (!this->Bottom.GetState()->GetIsInTryCompile()) {
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lfc.FilePath = converter.ConvertToRelativePath(
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this->Bottom.GetState()->GetSourceDirectory(), lfc.FilePath);
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}
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out << (lfc.Line ? " at " : " in ") << lfc;
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}
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void cmListFileBacktrace::PrintCallStack(std::ostream& out) const
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{
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if (!this->Cur || !this->Cur->Up) {
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return;
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}
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bool first = true;
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cmOutputConverter converter(this->Bottom);
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for (Entry* i = this->Cur->Up; i; i = i->Up) {
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if (i->Name.empty()) {
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// Skip this whole-file scope. When we get here we already will
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// have printed a more-specific context within the file.
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continue;
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}
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if (first) {
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first = false;
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out << "Call Stack (most recent call first):\n";
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}
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cmListFileContext lfc = *i;
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if (!this->Bottom.GetState()->GetIsInTryCompile()) {
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lfc.FilePath = converter.ConvertToRelativePath(
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this->Bottom.GetState()->GetSourceDirectory(), lfc.FilePath);
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}
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out << " " << lfc << "\n";
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}
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}
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std::ostream& operator<<(std::ostream& os, cmListFileContext const& lfc)
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{
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os << lfc.FilePath;
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if (lfc.Line) {
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os << ":" << lfc.Line;
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if (!lfc.Name.empty()) {
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os << " (" << lfc.Name << ")";
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}
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}
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return os;
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}
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bool operator<(const cmListFileContext& lhs, const cmListFileContext& rhs)
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{
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if (lhs.Line != rhs.Line) {
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return lhs.Line < rhs.Line;
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}
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return lhs.FilePath < rhs.FilePath;
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}
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bool operator==(const cmListFileContext& lhs, const cmListFileContext& rhs)
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{
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return lhs.Line == rhs.Line && lhs.FilePath == rhs.FilePath;
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}
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bool operator!=(const cmListFileContext& lhs, const cmListFileContext& rhs)
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{
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return !(lhs == rhs);
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}
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