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Implement IdentifyFileType function

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17776 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2004-11-14 22:05:32 +00:00
parent e3c6ad7e76
commit f37ce99c0a
1 changed files with 27 additions and 0 deletions
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27
lib/System/Path.cpp
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@ -21,6 +21,33 @@ using namespace sys;
//=== independent code.
//===----------------------------------------------------------------------===//
LLVMFileType
IdentifyFileType(const char*magic, unsigned length) {
assert(magic && "Invalid magic number string");
assert(length >=4 && "Invalid magic number length");
switch (magic[0]) {
case 'l':
if (magic[1] == 'l' && magic[2] == 'v') {
if (magic[3] == 'c')
return CompressedBytecodeFileType;
else if (magic[3] == 'm')
return BytecodeFileType;
}
break;
case '!':
if (length >= 8) {
if (memcmp(magic,"!<arch>\n",8) == 0)
return ArchiveFileType;
}
break;
default:
break;
}
return UnknownFileType;
}
}
// Include the truly platform-specific parts of this class.