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')
61 if (length >= 18 && magic[17] == 0)
64 case 1: return ELF_Relocatable_FileType;
65 case 2: return ELF_Executable_FileType;
66 case 3: return ELF_SharedObject_FileType;
67 case 4: return ELF_Core_FileType;
72 // This is complicated by an overlap with Java class files.
73 // See the Mach-O section in /usr/share/file/magic for details.
74 if (magic[1] == char(0xFE) && magic[2] == char(0xBA) &&
75 magic[3] == char(0xBE)) {
76 return Mach_O_DynamicallyLinkedSharedLib_FileType;
78 // FIXME: How does this work?
79 if (length >= 14 && magic[13] == 0)
82 case 1: return Mach_O_Object_FileType;
83 case 2: return Mach_O_Executable_FileType;
84 case 3: return Mach_O_FixedVirtualMemorySharedLib_FileType;
85 case 4: return Mach_O_Core_FileType;
86 case 5: return Mach_O_PreloadExectuable_FileType;
87 case 6: return Mach_O_DynamicallyLinkedSharedLib_FileType;
88 case 7: return Mach_O_DynamicLinker_FileType;
89 case 8: return Mach_O_Bundle_FileType;
90 case 9: return Mach_O_DynamicallyLinkedSharedLibStub_FileType;
95 case 0xF0: // PowerPC Windows
96 case 0x83: // Alpha 32-bit
97 case 0x84: // Alpha 64-bit
98 case 0x66: // MPS R4000 Windows
100 case 0x4c: // 80386 Windows
101 if (magic[1] == 0x01)
102 return COFF_FileType;
104 case 0x90: // PA-RISC Windows
105 case 0x68: // mc68K Windows
106 if (magic[1] == 0x02)
107 return COFF_FileType;
113 return Unknown_FileType;
117 Path::isArchive() const {
119 return hasMagicNumber("!<arch>\012");
124 Path::isDynamicLibrary() const {
127 if (getMagicNumber(Magic, 64))
128 switch (IdentifyFileType(Magic.c_str(), Magic.length())) {
129 default: return false;
130 case Mach_O_FixedVirtualMemorySharedLib_FileType:
131 case Mach_O_DynamicallyLinkedSharedLib_FileType:
132 case Mach_O_DynamicallyLinkedSharedLibStub_FileType:
133 case ELF_SharedObject_FileType:
134 case COFF_FileType: return true;
141 Path::FindLibrary(std::string& name) {
142 std::vector<sys::Path> LibPaths;
143 GetSystemLibraryPaths(LibPaths);
144 for (unsigned i = 0; i < LibPaths.size(); ++i) {
145 sys::Path FullPath(LibPaths[i]);
146 FullPath.appendComponent("lib" + name + LTDL_SHLIB_EXT);
147 if (FullPath.isDynamicLibrary())
149 FullPath.eraseSuffix();
150 FullPath.appendSuffix("a");
151 if (FullPath.isArchive())
157 std::string Path::GetDLLSuffix() {
158 return LTDL_SHLIB_EXT;
161 // Include the truly platform-specific parts of this class.
162 #if defined(LLVM_ON_UNIX)
163 #include "Unix/Path.inc"
165 #if defined(LLVM_ON_WIN32)
166 #include "Win32/Path.inc"
169 DEFINING_FILE_FOR(SystemPath)