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Path: Recognize Windows compiled resource file.

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Some background: One can pass compiled resource files (.res files) directly
to the linker on Windows. If a resource file is given, the linker will run
"cvtres" command in background to convert the resource file to a COFF file
to link it.

What I'm trying to do with this patch is to make the linker to recognize
the resource file by file magic, so that it can run cvtres command.

Differential Revision: http://llvm-reviews.chandlerc.com/D1943

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192742 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rui Ueyama
2013-10-15 22:45:38 +00:00
parent 72be32c633
commit b32b0376d4
5 changed files with 14 additions and 2 deletions
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8
lib/Support/Path.cpp
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@@ -847,6 +847,14 @@ error_code has_magic(const Twine &path, const Twine &magic, bool &result) {
if (Magic.size() < 4)
return file_magic::unknown;
switch ((unsigned char)Magic[0]) {
case 0x00: {
// Windows resource file
const char Expected[] = "\0\0\0\0\x20\0\0\0\xff";
if (Magic.size() >= sizeof(Expected) &&
memcmp(Magic.data(), Expected, sizeof(Expected)) == 0)
return file_magic::windows_resource;
break;
}
case 0xDE: // 0x0B17C0DE = BC wraper
if (Magic[1] == (char)0xC0 && Magic[2] == (char)0x17 &&
Magic[3] == (char)0x0B)