1 //===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Reid Spencer and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This header file implements the operating system Path concept.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/System/Path.h"
15 #include "llvm/Config/config.h"
21 //===----------------------------------------------------------------------===//
22 //=== WARNING: Implementation here must contain only TRULY operating system
23 //=== independent code.
24 //===----------------------------------------------------------------------===//
26 std::ostream& llvm::operator<<(std::ostream &strm, const sys::Path &aPath) {
27 strm << aPath.toString();
32 Path::GetLLVMConfigDir() {
35 if (result.set(LLVM_ETCDIR))
38 return GetLLVMDefaultConfigDir();
42 sys::IdentifyFileType(const char*magic, unsigned length) {
43 assert(magic && "Invalid magic number string");
44 assert(length >=4 && "Invalid magic number length");
47 if (magic[1] == 'l' && magic[2] == 'v')
49 return CompressedBytecode_FileType;
50 else if (magic[3] == 'm')
51 return Bytecode_FileType;
55 if (memcmp(magic,"!<arch>\n",8) == 0)
56 return Archive_FileType;
60 if (magic[1] == 'E' && magic[2] == 'L' && magic[3] == 'F')
66 // This is complicated by an overlap with Java class files.
67 // See the Mach-O section in /usr/share/file/magic for details.
68 if (magic[1] == char(0xFA) && magic[2] == char(0xED) &&
69 magic[3] == char(0xFE))
71 if (magic[15] == 1 || magic[15] == 3 || magic[15] == 6 ||
73 return Mach_O_FileType;
76 case 0xF0: // PowerPC Windows
77 case 0x83: // Alpha 32-bit
78 case 0x84: // Alpha 64-bit
79 case 0x66: // MPS R4000 Windows
81 case 0x4c: // 80386 Windows
85 case 0x90: // PA-RISC Windows
86 case 0x68: // mc68K Windows
94 return Unknown_FileType;
98 Path::isArchive() const {
100 return hasMagicNumber("!<arch>\012");
105 Path::isDynamicLibrary() const {
107 return hasMagicNumber("\177ELF");
112 Path::FindLibrary(std::string& name) {
113 std::vector<sys::Path> LibPaths;
114 GetSystemLibraryPaths(LibPaths);
115 for (unsigned i = 0; i < LibPaths.size(); ++i) {
116 sys::Path FullPath(LibPaths[i]);
117 FullPath.appendComponent("lib" + name + LTDL_SHLIB_EXT);
118 if (FullPath.isDynamicLibrary())
120 FullPath.eraseSuffix();
121 FullPath.appendSuffix("a");
122 if (FullPath.isArchive())
128 std::string Path::GetDLLSuffix() {
129 return LTDL_SHLIB_EXT;
132 // Include the truly platform-specific parts of this class.
133 #if defined(LLVM_ON_UNIX)
134 #include "Unix/Path.inc"
136 #if defined(LLVM_ON_WIN32)
137 #include "Win32/Path.inc"
140 DEFINING_FILE_FOR(SystemPath)