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//===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file 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/Support/Path.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/FileSystem.h"
#include <cassert>
#include <cstring>
#include <ostream>
using namespace llvm;
using namespace sys;
namespace {
using support::ulittle32_t;
}
//===----------------------------------------------------------------------===//
//=== WARNING: Implementation here must contain only TRULY operating system
//=== independent code.
//===----------------------------------------------------------------------===//
bool Path::operator==(const Path &that) const {
return path == that.path;
}
bool Path::operator<(const Path& that) const {
return path < that.path;
}
bool
Path::isArchive() const {
fs::file_magic type;
if (fs::identify_magic(str(), type))
return false;
return type == fs::file_magic::archive;
}
bool
Path::isDynamicLibrary() const {
fs::file_magic type;
if (fs::identify_magic(str(), type))
return false;
switch (type) {
default: return false;
case fs::file_magic::macho_fixed_virtual_memory_shared_lib:
case fs::file_magic::macho_dynamically_linked_shared_lib:
case fs::file_magic::macho_dynamically_linked_shared_lib_stub:
case fs::file_magic::elf_shared_object:
case fs::file_magic::pecoff_executable: return true;
}
}
bool
Path::isObjectFile() const {
fs::file_magic type;
if (fs::identify_magic(str(), type) || type == fs::file_magic::unknown)
return false;
return true;
}
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.appendComponent("lib" + name + LTDL_SHLIB_EXT);
if (FullPath.isDynamicLibrary())
return FullPath;
FullPath.eraseSuffix();
FullPath.appendSuffix("a");
if (FullPath.isArchive())
return FullPath;
}
return sys::Path();
}
StringRef Path::GetDLLSuffix() {
return &(LTDL_SHLIB_EXT[1]);
}
void
Path::appendSuffix(StringRef suffix) {
if (!suffix.empty()) {
path.append(".");
path.append(suffix);
}
}
bool
Path::isBitcodeFile() const {
fs::file_magic type;
if (fs::identify_magic(str(), type))
return false;
return type == fs::file_magic::bitcode;
}
bool Path::hasMagicNumber(StringRef Magic) const {
std::string actualMagic;
if (getMagicNumber(actualMagic, static_cast<unsigned>(Magic.size())))
return Magic == actualMagic;
return false;
}
static void getPathList(const char*path, std::vector<Path>& Paths) {
const char* at = path;
const char* delim = strchr(at, PathSeparator);
Path tmpPath;
while (delim != 0) {
std::string tmp(at, size_t(delim-at));
if (tmpPath.set(tmp))
if (tmpPath.canRead())
Paths.push_back(tmpPath);
at = delim + 1;
delim = strchr(at, PathSeparator);
}
if (*at != 0)
if (tmpPath.set(std::string(at)))
if (tmpPath.canRead())
Paths.push_back(tmpPath);
}
static StringRef getDirnameCharSep(StringRef path, const char *Sep) {
assert(Sep[0] != '\0' && Sep[1] == '\0' &&
"Sep must be a 1-character string literal.");
if (path.empty())
return ".";
// If the path is all slashes, return a single slash.
// Otherwise, remove all trailing slashes.
signed pos = static_cast<signed>(path.size()) - 1;
while (pos >= 0 && path[pos] == Sep[0])
--pos;
if (pos < 0)
return path[0] == Sep[0] ? Sep : ".";
// Any slashes left?
signed i = 0;
while (i < pos && path[i] != Sep[0])
++i;
if (i == pos) // No slashes? Return "."
return ".";
// There is at least one slash left. Remove all trailing non-slashes.
while (pos >= 0 && path[pos] != Sep[0])
--pos;
// Remove any trailing slashes.
while (pos >= 0 && path[pos] == Sep[0])
--pos;
if (pos < 0)
return path[0] == Sep[0] ? Sep : ".";
return path.substr(0, pos+1);
}
// 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 "Windows/Path.inc"
#endif
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