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pull some win32 code into common code, add bitcode identification support.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36846 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-05-06 05:32:21 +00:00
parent 609083b9e0
commit f283a5e53a
3 changed files with 29 additions and 46 deletions
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29
lib/System/Path.cpp
View File

@ -43,6 +43,10 @@ sys::IdentifyFileType(const char*magic, unsigned length) {
assert(magic && "Invalid magic number string");
assert(length >=4 && "Invalid magic number length");
switch (magic[0]) {
case 'B':
if (magic[1] == 'C' && magic[2] == (char)0xC0 && magic[3] == (char)0xDE)
return Bitcode_FileType;
break;
case 'l':
if (magic[1] == 'l' && magic[2] == 'v') {
if (magic[3] == 'c')
@ -160,6 +164,31 @@ std::string Path::GetDLLSuffix() {
return LTDL_SHLIB_EXT;
}
bool
Path::isBytecodeFile() const {
std::string actualMagic;
if (!getMagicNumber(actualMagic, 4))
return false;
return actualMagic == "llvc" || actualMagic == "llvm";
}
bool
Path::isBitcodeFile() const {
std::string actualMagic;
if (!getMagicNumber(actualMagic, 4))
return false;
return actualMagic == "BC\xC0\xDE";
}
bool Path::hasMagicNumber(const std::string &Magic) const {
std::string actualMagic;
if (getMagicNumber(actualMagic, Magic.size()))
return Magic == actualMagic;
return false;
}
// Include the truly platform-specific parts of this class.
#if defined(LLVM_ON_UNIX)
#include "Unix/Path.inc"

31
lib/System/Unix/Path.inc
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@ -267,21 +267,6 @@ Path::getBasename() const {
return path.substr(slash, dot - slash);
}
bool Path::hasMagicNumber(const std::string &Magic) const {
size_t len = Magic.size();
assert(len < 1024 && "Request for magic string too long");
char* buf = (char*) alloca(1 + len);
int fd = ::open(path.c_str(), O_RDONLY);
if (fd < 0)
return false;
size_t read_len = ::read(fd, buf, len);
close(fd);
if (len != read_len)
return false;
buf[len] = '\0';
return Magic == buf;
}
bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
assert(len < 1024 && "Request for magic string too long");
char* buf = (char*) alloca(1 + len);
@ -298,22 +283,6 @@ bool Path::getMagicNumber(std::string& Magic, unsigned len) const {
return true;
}
bool
Path::isBytecodeFile() const {
char buffer[4];
buffer[0] = 0;
int fd = ::open(path.c_str(), O_RDONLY);
if (fd < 0)
return false;
ssize_t bytes_read = ::read(fd, buffer, 4);
::close(fd);
if (4 != bytes_read)
return false;
return (buffer[0] == 'l' && buffer[1] == 'l' && buffer[2] == 'v' &&
(buffer[3] == 'c' || buffer[3] == 'm'));
}
bool
Path::exists() const {
return 0 == access(path.c_str(), F_OK );

15
lib/System/Win32/Path.inc
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@ -247,21 +247,6 @@ Path::getBasename() const {
return path.substr(slash, dot - slash);
}
bool Path::hasMagicNumber(const std::string &Magic) const {
std::string actualMagic;
if (getMagicNumber(actualMagic, Magic.size()))
return Magic == actualMagic;
return false;
}
bool
Path::isBytecodeFile() const {
std::string actualMagic;
if (!getMagicNumber(actualMagic, 4))
return false;
return actualMagic == "llvc" || actualMagic == "llvm";
}
bool
Path::exists() const {
DWORD attr = GetFileAttributes(path.c_str());