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ccb23a13e9
* Move generic isArchive method here from Unix/Path.cpp \ * Implement isDynamicLibrary \ * Implement FindLibrary for Linker git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18861 91177308-0d34-0410-b5e6-96231b3b80d8
89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
//===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Reid Spencer and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header file implements the operating system Path concept.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/System/Path.h"
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#include <cassert>
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namespace llvm {
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using namespace sys;
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only TRULY operating system
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//=== independent code.
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//===----------------------------------------------------------------------===//
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LLVMFileType
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sys::IdentifyFileType(const char*magic, unsigned length) {
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assert(magic && "Invalid magic number string");
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assert(length >=4 && "Invalid magic number length");
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switch (magic[0]) {
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case 'l':
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if (magic[1] == 'l' && magic[2] == 'v') {
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if (magic[3] == 'c')
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return CompressedBytecodeFileType;
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else if (magic[3] == 'm')
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return BytecodeFileType;
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}
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break;
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case '!':
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if (length >= 8) {
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if (memcmp(magic,"!<arch>\n",8) == 0)
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return ArchiveFileType;
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}
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break;
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default:
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break;
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}
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return UnknownFileType;
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}
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bool
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Path::isArchive() const {
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if (readable())
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return hasMagicNumber("!<arch>\012");
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return false;
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}
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bool
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Path::isDynamicLibrary() const {
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if (readable())
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return hasMagicNumber("\177ELF");
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return false;
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}
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Path
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Path::FindLibrary(std::string& name) {
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std::vector<sys::Path> LibPaths;
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GetSystemLibraryPaths(LibPaths);
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for (unsigned i = 0; i < LibPaths.size(); ++i) {
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sys::Path FullPath(LibPaths[i]);
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FullPath.appendFile("lib" + name + LTDL_SHLIB_EXT);
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if (FullPath.isDynamicLibrary())
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return FullPath;
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FullPath.elideSuffix();
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FullPath.appendSuffix("a");
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if (FullPath.isArchive())
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return FullPath;
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}
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return sys::Path();
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}
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}
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// Include the truly platform-specific parts of this class.
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#include "platform/Path.cpp"
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// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
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