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authorReid Spencer <rspencer@reidspencer.com>2004-11-14 21:56:59 +0000
committerReid Spencer <rspencer@reidspencer.com>2004-11-14 21:56:59 +0000
commitcf6afc623957682d3f7813cc72742dd0100bf5f1 (patch)
tree5ee857dea988719462d557d63d32fab601481c7a /lib/Archive/Archive.cpp
parent5544b5e50b859cff03fcace5b2ffbd1a7b5670da (diff)
First working version
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17765 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Archive/Archive.cpp')
-rw-r--r--lib/Archive/Archive.cpp130
1 files changed, 128 insertions, 2 deletions
diff --git a/lib/Archive/Archive.cpp b/lib/Archive/Archive.cpp
index e9fcd2ebe16..b006e5a83d7 100644
--- a/lib/Archive/Archive.cpp
+++ b/lib/Archive/Archive.cpp
@@ -7,18 +7,144 @@
//
//===----------------------------------------------------------------------===//
//
-// Builds up standard unix archive files (.a) containing LLVM bytecode.
+// This file contains the implementation of the Archive and ArchiveMember
+// classes that is common to both reading and writing archives..
//
//===----------------------------------------------------------------------===//
#include "ArchiveInternals.h"
+#include "llvm/ModuleProvider.h"
using namespace llvm;
-Archive::Archive() {
+// getMemberSize - compute the actual physical size of the file member as seen
+// on disk. This isn't the size of member's payload. Use getSize() for that.
+unsigned
+ArchiveMember::getMemberSize() const {
+ // Basically its the file size plus the header size
+ unsigned result = info.fileSize + sizeof(ArchiveMemberHeader);
+
+ // If it has a long filename, include the name length
+ if (hasLongFilename())
+ result += path.get().length() + 1;
+
+ // If its now odd lengthed, include the padding byte
+ if (result % 2 != 0 )
+ result++;
+
+ return result;
+}
+
+// This default constructor is only use by the ilist when it creates its
+// sentry node. We give it specific static values to make it stand out a bit.
+ArchiveMember::ArchiveMember()
+ : next(0), prev(0), parent(0), path("<invalid>"), flags(0), data(0)
+{
+ info.user = 1000;
+ info.group = 1000;
+ info.mode = 0777;
+ info.fileSize = 0;
+ info.modTime = sys::TimeValue::now();
+}
+
+// This is the constructor that the Archive class uses when it is building or
+// reading an archive. It just defaults a few things and ensures the parent is
+// set for the iplist. The Archive class fills in the ArchiveMember's data.
+// This is required because correctly setting the data may depend on other
+// things in the Archive.
+ArchiveMember::ArchiveMember(Archive* PAR)
+ : next(0), prev(0), parent(PAR), path(), flags(0), data(0)
+{
+}
+
+// This method allows an ArchiveMember to be replaced with the data for a
+// different file, presumably as an update to the member. It also makes sure
+// the flags are reset correctly.
+void ArchiveMember::replaceWith(const sys::Path& newFile) {
+ assert(newFile.exists() && "Can't replace with a non-existent file");
+ data = 0;
+ path = newFile;
+
+ // Foreign symbol tables have an empty name
+ if (path.get() == ARFILE_SYMTAB_NAME)
+ flags |= ForeignSymbolTableFlag;
+ else
+ flags &= ~ForeignSymbolTableFlag;
+
+ // LLVM symbol tables have a very specific name
+ if (path.get() == ARFILE_LLVM_SYMTAB_NAME)
+ flags |= LLVMSymbolTableFlag;
+ else
+ flags &= ~LLVMSymbolTableFlag;
+
+ // String table name
+ if (path.get() == ARFILE_STRTAB_NAME)
+ flags |= StringTableFlag;
+ else
+ flags &= ~StringTableFlag;
+
+ // If it has a slash then it has a path
+ bool hasSlash = path.get().find('/') != std::string::npos;
+ if (hasSlash)
+ flags |= HasPathFlag;
+ else
+ flags &= ~HasPathFlag;
+
+ // If it has a slash or its over 15 chars then its a long filename format
+ if (hasSlash || path.get().length() > 15)
+ flags |= HasLongFilenameFlag;
+ else
+ flags &= ~HasLongFilenameFlag;
+
+ // Get the signature and status info
+ std::string magic;
+ const char* signature = (const char*) data;
+ if (!signature) {
+ path.getMagicNumber(magic,4);
+ signature = magic.c_str();
+ path.getStatusInfo(info);
+ }
+
+ // Determine what kind of file it is
+ switch (sys::IdentifyFileType(signature,4)) {
+ case sys::BytecodeFileType:
+ flags |= BytecodeFlag;
+ break;
+ case sys::CompressedBytecodeFileType:
+ flags |= CompressedBytecodeFlag;
+ flags &= ~CompressedFlag;
+ break;
+ default:
+ flags &= ~(BytecodeFlag|CompressedBytecodeFlag);
+ break;
+ }
+}
+
+// Archive constructor - this is the only constructor that gets used for the
+// Archive class. Everything else (default,copy) is deprecated. This just
+// initializes and maps the file into memory, if requested.
+Archive::Archive(const sys::Path& filename, bool map )
+ : archPath(filename), members(), mapfile(0), base(0), symTab(), symTabSize(0)
+{
+ if (map) {
+ mapfile = new sys::MappedFile(filename);
+ base = (char*) mapfile->map();
+ }
}
+// Archive destructor - just clean up memory
Archive::~Archive() {
+ // Shutdown the file mapping
+ if (mapfile) {
+ mapfile->unmap();
+ delete mapfile;
+ }
+ // Delete any ModuleProviders and ArchiveMember's we've allocated as a result
+ // of symbol table searches.
+ for (ModuleMap::iterator I=modules.begin(), E=modules.end(); I != E; ++I ) {
+ delete I->second.first;
+ delete I->second.second;
+ }
}
// vim: sw=2 ai