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//===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Reid Spencer and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This header file implements the operating system Path concept.
//
//===----------------------------------------------------------------------===//
#include "llvm/System/Path.h"
#include "llvm/Config/config.h"
#include <cassert>
namespace llvm {
using namespace sys;
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only TRULY operating system
//=== independent code.
//===----------------------------------------------------------------------===//
Path
Path::GetLLVMConfigDir() {
Path result;
#ifdef LLVM_ETCDIR
if (result.setDirectory(LLVM_ETCDIR))
return result;
#endif
return GetLLVMDefaultConfigDir();
}
LLVMFileType
sys::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;
}
bool
Path::isArchive() const {
if (readable())
return hasMagicNumber("!<arch>\012");
return false;
}
bool
Path::isDynamicLibrary() const {
if (readable())
return hasMagicNumber("\177ELF");
return false;
}
Path
Path::FindLibrary(std::string& name) {
std::vector<sys::Path> LibPaths;
GetSystemLibraryPaths(LibPaths);
for (unsigned i = 0; i < LibPaths.size(); ++i) {
sys::Path FullPath(LibPaths[i]);
FullPath.appendFile("lib" + name + LTDL_SHLIB_EXT);
if (FullPath.isDynamicLibrary())
return FullPath;
FullPath.elideSuffix();
FullPath.appendSuffix("a");
if (FullPath.isArchive())
return FullPath;
}
return sys::Path();
}
std::string
Path::GetDLLSuffix() {
return LTDL_SHLIB_EXT;
}
}
// Include the truly platform-specific parts of this class.
#if defined(LLVM_ON_UNIX)
#include "Unix/Path.inc"
#endif
#if defined(LLVM_ON_WIN32)
#include "Win32/Path.inc"
#endif
// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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