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150 lines
3.6 KiB
150 lines
3.6 KiB
/* 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 "cmGccDepfileLexerHelper.h"
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#include <cstdio>
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#include <memory>
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#include <string>
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#include <vector>
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#include "cmGccDepfileReaderTypes.h"
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#include "LexerParser/cmGccDepfileLexer.h"
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#ifdef _WIN32
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# include <cctype>
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# include "cmsys/Encoding.h"
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#endif
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bool cmGccDepfileLexerHelper::readFile(const char* filePath)
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{
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#ifdef _WIN32
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wchar_t* wpath = cmsysEncoding_DupToWide(filePath);
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FILE* file = _wfopen(wpath, L"rb");
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free(wpath);
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#else
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FILE* file = fopen(filePath, "r");
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#endif
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if (!file) {
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return false;
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}
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this->newEntry();
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yyscan_t scanner;
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cmGccDepfile_yylex_init(&scanner);
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cmGccDepfile_yyset_extra(this, scanner);
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cmGccDepfile_yyrestart(file, scanner);
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cmGccDepfile_yylex(scanner);
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cmGccDepfile_yylex_destroy(scanner);
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this->sanitizeContent();
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fclose(file);
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return this->HelperState != State::Failed;
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}
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void cmGccDepfileLexerHelper::newEntry()
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{
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if (this->HelperState == State::Rule && !this->Content.empty()) {
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if (!this->Content.back().rules.empty() &&
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!this->Content.back().rules.back().empty()) {
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this->HelperState = State::Failed;
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}
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return;
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}
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this->HelperState = State::Rule;
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this->Content.emplace_back();
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this->newRule();
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}
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void cmGccDepfileLexerHelper::newRule()
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{
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auto& entry = this->Content.back();
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if (entry.rules.empty() || !entry.rules.back().empty()) {
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entry.rules.emplace_back();
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}
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}
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void cmGccDepfileLexerHelper::newDependency()
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{
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if (this->HelperState == State::Failed) {
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return;
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}
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this->HelperState = State::Dependency;
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auto& entry = this->Content.back();
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if (entry.paths.empty() || !entry.paths.back().empty()) {
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entry.paths.emplace_back();
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}
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}
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void cmGccDepfileLexerHelper::newRuleOrDependency()
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{
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if (this->HelperState == State::Rule) {
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this->newRule();
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} else if (this->HelperState == State::Dependency) {
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this->newDependency();
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}
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}
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void cmGccDepfileLexerHelper::addToCurrentPath(const char* s)
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{
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if (this->Content.empty()) {
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return;
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}
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cmGccStyleDependency* dep = &this->Content.back();
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std::string* dst = nullptr;
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switch (this->HelperState) {
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case State::Rule: {
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if (dep->rules.empty()) {
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return;
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}
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dst = &dep->rules.back();
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} break;
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case State::Dependency: {
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if (dep->paths.empty()) {
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return;
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}
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dst = &dep->paths.back();
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} break;
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case State::Failed:
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return;
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}
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dst->append(s);
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}
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void cmGccDepfileLexerHelper::sanitizeContent()
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{
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for (auto it = this->Content.begin(); it != this->Content.end();) {
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// Remove empty paths and normalize windows paths
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for (auto pit = it->paths.begin(); pit != it->paths.end();) {
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if (pit->empty()) {
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pit = it->paths.erase(pit);
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} else {
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#if defined(_WIN32)
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// Unescape the colon following the drive letter.
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// Some versions of GNU compilers can escape this character.
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// c\:\path must be transformed to c:\path
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if (pit->size() >= 3 && std::toupper((*pit)[0]) >= 'A' &&
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std::toupper((*pit)[0]) <= 'Z' && (*pit)[1] == '\\' &&
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(*pit)[2] == ':') {
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pit->erase(1, 1);
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}
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#endif
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++pit;
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}
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}
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// Remove empty rules
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for (auto rit = it->rules.begin(); rit != it->rules.end();) {
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if (rit->empty()) {
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rit = it->rules.erase(rit);
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} else {
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++rit;
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}
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}
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// Remove the entry if rules are empty or do not have any paths
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if (it->rules.empty() || it->paths.empty()) {
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it = this->Content.erase(it);
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} else {
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++it;
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}
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}
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}
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