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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "clparser.h"
#include <algorithm>
#include <assert.h>
#include <string.h>
#include "metrics.h"
#include "string_piece_util.h"
#ifdef _WIN32
#include "includes_normalize.h"
#include "string_piece.h"
#else
#include "util.h"
#endif
namespace {
/// Return true if \a input ends with \a needle.
bool EndsWith(const string& input, const string& needle) {
return (input.size() >= needle.size() &&
input.substr(input.size() - needle.size()) == needle);
}
} // anonymous namespace
// static
string CLParser::FilterShowIncludes(const string& line,
const string& deps_prefix) {
const string kDepsPrefixEnglish = "Note: including file: ";
const char* in = line.c_str();
const char* end = in + line.size();
const string& prefix = deps_prefix.empty() ? kDepsPrefixEnglish : deps_prefix;
if (end - in > (int)prefix.size() &&
memcmp(in, prefix.c_str(), (int)prefix.size()) == 0) {
in += prefix.size();
while (*in == ' ')
++in;
return line.substr(in - line.c_str());
}
return "";
}
// static
bool CLParser::IsSystemInclude(string path) {
transform(path.begin(), path.end(), path.begin(), ToLowerASCII);
// TODO: this is a heuristic, perhaps there's a better way?
return (path.find("program files") != string::npos ||
path.find("microsoft visual studio") != string::npos);
}
// static
bool CLParser::FilterInputFilename(string line) {
transform(line.begin(), line.end(), line.begin(), ToLowerASCII);
// TODO: other extensions, like .asm?
return EndsWith(line, ".c") ||
EndsWith(line, ".cc") ||
EndsWith(line, ".cxx") ||
EndsWith(line, ".cpp");
}
// static
bool CLParser::Parse(const string& output, const string& deps_prefix,
string* filtered_output, string* err) {
METRIC_RECORD("CLParser::Parse");
// Loop over all lines in the output to process them.
assert(&output != filtered_output);
size_t start = 0;
#ifdef _WIN32
IncludesNormalize normalizer(".");
#endif
while (start < output.size()) {
size_t end = output.find_first_of("\r\n", start);
if (end == string::npos)
end = output.size();
string line = output.substr(start, end - start);
string include = FilterShowIncludes(line, deps_prefix);
if (!include.empty()) {
string normalized;
#ifdef _WIN32
if (!normalizer.Normalize(include, &normalized, err))
return false;
#else
// TODO: should this make the path relative to cwd?
normalized = include;
uint64_t slash_bits;
if (!CanonicalizePath(&normalized, &slash_bits, err))
return false;
#endif
if (!IsSystemInclude(normalized))
includes_.insert(normalized);
} else if (FilterInputFilename(line)) {
// Drop it.
// TODO: if we support compiling multiple output files in a single
// cl.exe invocation, we should stash the filename.
} else {
filtered_output->append(line);
filtered_output->append("\n");
}
if (end < output.size() && output[end] == '\r')
++end;
if (end < output.size() && output[end] == '\n')
++end;
start = end;
}
return true;
}