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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmUseMangledMesaCommand.h"
#include "cmsys/FStream.hxx"
#include "cmsys/RegularExpression.hxx"
#include "cmSystemTools.h"
class cmExecutionStatus;
bool cmUseMangledMesaCommand::InitialPass(std::vector<std::string> const& args,
cmExecutionStatus&)
{
// expected two arguments:
// argument one: the full path to gl_mangle.h
// argument two : directory for output of edited headers
if (args.size() != 2) {
this->SetError("called with incorrect number of arguments");
return false;
}
const std::string& inputDir = args[0];
std::string glh = inputDir;
glh += "/";
glh += "gl.h";
if (!cmSystemTools::FileExists(glh)) {
std::string e = "Bad path to Mesa, could not find: ";
e += glh;
e += " ";
this->SetError(e);
return false;
}
const char* destDir = args[1].c_str();
std::vector<std::string> files;
cmSystemTools::Glob(inputDir, "\\.h$", files);
if (files.empty()) {
cmSystemTools::Error("Could not open Mesa Directory " + inputDir);
return false;
}
cmSystemTools::MakeDirectory(destDir);
for (std::string const& f : files) {
std::string path = inputDir;
path += "/";
path += f;
this->CopyAndFullPathMesaHeader(path.c_str(), destDir);
}
return true;
}
void cmUseMangledMesaCommand::CopyAndFullPathMesaHeader(const char* source,
const char* outdir)
{
std::string dir, file;
cmSystemTools::SplitProgramPath(source, dir, file);
std::string outFile = outdir;
outFile += "/";
outFile += file;
std::string tempOutputFile = outFile;
tempOutputFile += ".tmp";
cmsys::ofstream fout(tempOutputFile.c_str());
if (!fout) {
cmSystemTools::Error("Could not open file for write in copy operation: " +
tempOutputFile + outdir);
cmSystemTools::ReportLastSystemError("");
return;
}
cmsys::ifstream fin(source);
if (!fin) {
cmSystemTools::Error("Could not open file for read in copy operation",
source);
return;
}
// now copy input to output and expand variables in the
// input file at the same time
std::string inLine;
// regular expression for any #include line
cmsys::RegularExpression includeLine(
"^[ \t]*#[ \t]*include[ \t]*[<\"]([^\">]+)[\">]");
// regular expression for gl/ or GL/ in a file (match(1) of above)
cmsys::RegularExpression glDirLine(R"((gl|GL)(/|\\)([^<"]+))");
// regular expression for gl GL or xmesa in a file (match(1) of above)
cmsys::RegularExpression glLine("(gl|GL|xmesa)");
while (cmSystemTools::GetLineFromStream(fin, inLine)) {
if (includeLine.find(inLine)) {
std::string includeFile = includeLine.match(1);
if (glDirLine.find(includeFile)) {
std::string gfile = glDirLine.match(3);
fout << "#include \"" << outdir << "/" << gfile << "\"\n";
} else if (glLine.find(includeFile)) {
fout << "#include \"" << outdir << "/" << includeLine.match(1)
<< "\"\n";
} else {
fout << inLine << "\n";
}
} else {
fout << inLine << "\n";
}
}
// close the files before attempting to copy
fin.close();
fout.close();
cmSystemTools::CopyFileIfDifferent(tempOutputFile, outFile);
cmSystemTools::RemoveFile(tempOutputFile);
}
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