1 //===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // 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"
22 //===----------------------------------------------------------------------===//
23 //=== WARNING: Implementation here must contain only TRULY operating system
24 //=== independent code.
25 //===----------------------------------------------------------------------===//
27 bool Path::operator==(const Path &that) const {
28 return path == that.path;
31 bool Path::operator!=(const Path &that) const {
32 return path != that.path;
35 bool Path::operator<(const Path& that) const {
36 return path < that.path;
39 std::ostream& llvm::operator<<(std::ostream &strm, const sys::Path &aPath) {
40 strm << aPath.toString();
45 Path::GetLLVMConfigDir() {
48 if (result.set(LLVM_ETCDIR))
51 return GetLLVMDefaultConfigDir();
55 sys::IdentifyFileType(const char*magic, unsigned length) {
56 assert(magic && "Invalid magic number string");
57 assert(length >=4 && "Invalid magic number length");
60 if (magic[1] == 'C' && magic[2] == (char)0xC0 && magic[3] == (char)0xDE)
61 return Bitcode_FileType;
65 if (memcmp(magic,"!<arch>\n",8) == 0)
66 return Archive_FileType;
70 if (magic[1] == 'E' && magic[2] == 'L' && magic[3] == 'F') {
71 if (length >= 18 && magic[17] == 0)
74 case 1: return ELF_Relocatable_FileType;
75 case 2: return ELF_Executable_FileType;
76 case 3: return ELF_SharedObject_FileType;
77 case 4: return ELF_Core_FileType;
83 // This is complicated by an overlap with Java class files.
84 // See the Mach-O section in /usr/share/file/magic for details.
85 if (magic[1] == char(0xFE) && magic[2] == char(0xBA) &&
86 magic[3] == char(0xBE)) {
87 return Mach_O_DynamicallyLinkedSharedLib_FileType;
89 // FIXME: How does this work?
90 if (length >= 14 && magic[13] == 0)
93 case 1: return Mach_O_Object_FileType;
94 case 2: return Mach_O_Executable_FileType;
95 case 3: return Mach_O_FixedVirtualMemorySharedLib_FileType;
96 case 4: return Mach_O_Core_FileType;
97 case 5: return Mach_O_PreloadExectuable_FileType;
98 case 6: return Mach_O_DynamicallyLinkedSharedLib_FileType;
99 case 7: return Mach_O_DynamicLinker_FileType;
100 case 8: return Mach_O_Bundle_FileType;
101 case 9: return Mach_O_DynamicallyLinkedSharedLibStub_FileType;
106 case 0xF0: // PowerPC Windows
107 case 0x83: // Alpha 32-bit
108 case 0x84: // Alpha 64-bit
109 case 0x66: // MPS R4000 Windows
111 case 0x4c: // 80386 Windows
112 if (magic[1] == 0x01)
113 return COFF_FileType;
115 case 0x90: // PA-RISC Windows
116 case 0x68: // mc68K Windows
117 if (magic[1] == 0x02)
118 return COFF_FileType;
124 return Unknown_FileType;
128 Path::isArchive() const {
130 return hasMagicNumber("!<arch>\012");
135 Path::isDynamicLibrary() const {
138 if (getMagicNumber(Magic, 64))
139 switch (IdentifyFileType(Magic.c_str(),
140 static_cast<unsigned>(Magic.length()))) {
141 default: return false;
142 case Mach_O_FixedVirtualMemorySharedLib_FileType:
143 case Mach_O_DynamicallyLinkedSharedLib_FileType:
144 case Mach_O_DynamicallyLinkedSharedLibStub_FileType:
145 case ELF_SharedObject_FileType:
146 case COFF_FileType: return true;
153 Path::FindLibrary(std::string& name) {
154 std::vector<sys::Path> LibPaths;
155 GetSystemLibraryPaths(LibPaths);
156 for (unsigned i = 0; i < LibPaths.size(); ++i) {
157 sys::Path FullPath(LibPaths[i]);
158 FullPath.appendComponent("lib" + name + LTDL_SHLIB_EXT);
159 if (FullPath.isDynamicLibrary())
161 FullPath.eraseSuffix();
162 FullPath.appendSuffix("a");
163 if (FullPath.isArchive())
169 std::string Path::GetDLLSuffix() {
170 return LTDL_SHLIB_EXT;
174 Path::isBitcodeFile() const {
175 std::string actualMagic;
176 if (!getMagicNumber(actualMagic, 4))
178 return actualMagic == "BC\xC0\xDE";
181 bool Path::hasMagicNumber(const std::string &Magic) const {
182 std::string actualMagic;
183 if (getMagicNumber(actualMagic, static_cast<unsigned>(Magic.size())))
184 return Magic == actualMagic;
188 static void getPathList(const char*path, std::vector<Path>& Paths) {
189 const char* at = path;
190 const char* delim = strchr(at, PathSeparator);
193 std::string tmp(at, size_t(delim-at));
194 if (tmpPath.set(tmp))
195 if (tmpPath.canRead())
196 Paths.push_back(tmpPath);
198 delim = strchr(at, PathSeparator);
202 if (tmpPath.set(std::string(at)))
203 if (tmpPath.canRead())
204 Paths.push_back(tmpPath);
207 static std::string getDirnameCharSep(const std::string& path, char Sep) {
212 // If the path is all slashes, return a single slash.
213 // Otherwise, remove all trailing slashes.
215 signed pos = static_cast<signed>(path.size()) - 1;
217 while (pos >= 0 && path[pos] == Sep)
221 return path[0] == Sep ? std::string(1, Sep) : std::string(".");
226 while (i < pos && path[i] != Sep)
229 if (i == pos) // No slashes? Return "."
232 // There is at least one slash left. Remove all trailing non-slashes.
233 while (pos >= 0 && path[pos] != Sep)
236 // Remove any trailing slashes.
237 while (pos >= 0 && path[pos] == Sep)
241 return path[0] == Sep ? std::string(1, Sep) : std::string(".");
243 return path.substr(0, pos+1);
246 // Include the truly platform-specific parts of this class.
247 #if defined(LLVM_ON_UNIX)
248 #include "Unix/Path.inc"
250 #if defined(LLVM_ON_WIN32)
251 #include "Win32/Path.inc"