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Move IsArchive, IsBytecode to FileUtilities. Fix up some method comments.

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llvm-svn: 9902
This commit is contained in:
Brian Gaeke 2003-11-11 21:54:01 +00:00
parent ba8e968641
commit dad096c2e1
1 changed files with 17 additions and 60 deletions
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77
tools/gccld/Linker.cpp
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@ -30,50 +30,15 @@
#include <memory>
#include <set>
/// IsArchive - Returns true IFF the file named FN appears to be a "ar" library
/// archive. The file named FN must exist.
/// FindLib - Try to convert Filename into the name of a file that we can open,
/// if it does not already name a file we can open, by first trying to open
/// Filename, then libFilename.<suffix> for each of a set of several common
/// library suffixes, in each of the directories in Paths and the directory
/// named by the value of the environment variable LLVM_LIB_SEARCH_PATH. Returns
/// an empty string if no matching file can be found.
///
static inline bool IsArchive(const std::string &FN) {
// Inspect the beginning of the file to see if it contains the "ar" magic
// string.
std::string Magic("!<arch>\012");
char buf[1 + Magic.size()];
std::ifstream f(FN.c_str());
f.read(buf, Magic.size());
buf[Magic.size()] = '\0';
return Magic == buf;
}
/// IsBytecode - Returns true IFF the file named FN appears to be an
/// LLVM bytecode file. The file named FN must exist.
///
static inline bool IsBytecode(const std::string &FN) {
// Inspect the beginning of the file to see if it contains the LLVM
// bytecode format magic string.
std::string Magic("llvm");
char buf[1 + Magic.size()];
std::ifstream f(FN.c_str());
f.read(buf, Magic.size());
buf[Magic.size()] = '\0';
return Magic == buf;
}
/// FindLib - locates a particular library. It will prepend and append
/// various directories, prefixes, and suffixes until it can find the library.
///
/// Inputs:
/// Filename - Name of the file to find.
/// Paths - List of directories to search.
///
/// Outputs:
/// None.
///
/// Return value:
/// The name of the file is returned.
/// If the file is not found, an empty string is returned.
///
static std::string
FindLib(const std::string &Filename, const std::vector<std::string> &Paths) {
static std::string FindLib(const std::string &Filename,
const std::vector<std::string> &Paths) {
// Determine if the pathname can be found as it stands.
if (FileOpenable(Filename))
return Filename;
@ -165,25 +130,17 @@ GetAllUndefinedSymbols(Module *M, std::set<std::string> &UndefinedSymbols) {
}
/// LoadObject - reads the specified bytecode object file.
/// LoadObject - Read in and parse the bytecode file named by FN and return the
/// module it contains (wrapped in an auto_ptr), or 0 and set ErrorMessage if an
/// error occurs.
///
/// Inputs:
/// FN - The name of the file to load.
///
/// Outputs:
/// OutErrorMessage - The error message to give back to the caller.
///
/// Return Value:
/// A pointer to a module represening the bytecode file is returned.
/// If an error occurs, the pointer is 0.
///
std::auto_ptr<Module>
LoadObject(const std::string & FN, std::string &OutErrorMessage) {
std::string ErrorMessage;
Module *Result = ParseBytecodeFile(FN, &ErrorMessage);
std::auto_ptr<Module> LoadObject(const std::string &FN,
std::string &ErrorMessage) {
std::string ParserErrorMessage;
Module *Result = ParseBytecodeFile(FN, &ParserErrorMessage);
if (Result) return std::auto_ptr<Module>(Result);
OutErrorMessage = "Bytecode file '" + FN + "' corrupt!";
if (ErrorMessage.size()) OutErrorMessage += ": " + ErrorMessage;
ErrorMessage = "Bytecode file '" + FN + "' could not be loaded";
if (ParserErrorMessage.size()) ErrorMessage += ": " + ParserErrorMessage;
return std::auto_ptr<Module>();
}