mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-26 12:43:36 +01:00
8f2b0ac07b
and follow-ups: a2ca1c2d "build: disable zlib by default on Windows" 2181bf40 "[CMake] Link against ZLIB::ZLIB" 1079c68a "Attempt to fix ZLIB CMake logic on Windows" This changed the output of llvm-config --system-libs, and more importantly it broke stand-alone builds. Instead of piling on more fix attempts, let's revert this to reduce the risk of more breakages.
107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
//===--- Compression.cpp - Compression implementation ---------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements compression functions.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/Compression.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Config/config.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#if LLVM_ENABLE_ZLIB == 1 && HAVE_ZLIB_H
|
|
#include <zlib.h>
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
|
|
#if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
|
|
static Error createError(StringRef Err) {
|
|
return make_error<StringError>(Err, inconvertibleErrorCode());
|
|
}
|
|
|
|
static StringRef convertZlibCodeToString(int Code) {
|
|
switch (Code) {
|
|
case Z_MEM_ERROR:
|
|
return "zlib error: Z_MEM_ERROR";
|
|
case Z_BUF_ERROR:
|
|
return "zlib error: Z_BUF_ERROR";
|
|
case Z_STREAM_ERROR:
|
|
return "zlib error: Z_STREAM_ERROR";
|
|
case Z_DATA_ERROR:
|
|
return "zlib error: Z_DATA_ERROR";
|
|
case Z_OK:
|
|
default:
|
|
llvm_unreachable("unknown or unexpected zlib status code");
|
|
}
|
|
}
|
|
|
|
bool zlib::isAvailable() { return true; }
|
|
|
|
Error zlib::compress(StringRef InputBuffer,
|
|
SmallVectorImpl<char> &CompressedBuffer, int Level) {
|
|
unsigned long CompressedSize = ::compressBound(InputBuffer.size());
|
|
CompressedBuffer.reserve(CompressedSize);
|
|
int Res =
|
|
::compress2((Bytef *)CompressedBuffer.data(), &CompressedSize,
|
|
(const Bytef *)InputBuffer.data(), InputBuffer.size(), Level);
|
|
// Tell MemorySanitizer that zlib output buffer is fully initialized.
|
|
// This avoids a false report when running LLVM with uninstrumented ZLib.
|
|
__msan_unpoison(CompressedBuffer.data(), CompressedSize);
|
|
CompressedBuffer.set_size(CompressedSize);
|
|
return Res ? createError(convertZlibCodeToString(Res)) : Error::success();
|
|
}
|
|
|
|
Error zlib::uncompress(StringRef InputBuffer, char *UncompressedBuffer,
|
|
size_t &UncompressedSize) {
|
|
int Res =
|
|
::uncompress((Bytef *)UncompressedBuffer, (uLongf *)&UncompressedSize,
|
|
(const Bytef *)InputBuffer.data(), InputBuffer.size());
|
|
// Tell MemorySanitizer that zlib output buffer is fully initialized.
|
|
// This avoids a false report when running LLVM with uninstrumented ZLib.
|
|
__msan_unpoison(UncompressedBuffer, UncompressedSize);
|
|
return Res ? createError(convertZlibCodeToString(Res)) : Error::success();
|
|
}
|
|
|
|
Error zlib::uncompress(StringRef InputBuffer,
|
|
SmallVectorImpl<char> &UncompressedBuffer,
|
|
size_t UncompressedSize) {
|
|
UncompressedBuffer.resize(UncompressedSize);
|
|
Error E =
|
|
uncompress(InputBuffer, UncompressedBuffer.data(), UncompressedSize);
|
|
UncompressedBuffer.resize(UncompressedSize);
|
|
return E;
|
|
}
|
|
|
|
uint32_t zlib::crc32(StringRef Buffer) {
|
|
return ::crc32(0, (const Bytef *)Buffer.data(), Buffer.size());
|
|
}
|
|
|
|
#else
|
|
bool zlib::isAvailable() { return false; }
|
|
Error zlib::compress(StringRef InputBuffer,
|
|
SmallVectorImpl<char> &CompressedBuffer, int Level) {
|
|
llvm_unreachable("zlib::compress is unavailable");
|
|
}
|
|
Error zlib::uncompress(StringRef InputBuffer, char *UncompressedBuffer,
|
|
size_t &UncompressedSize) {
|
|
llvm_unreachable("zlib::uncompress is unavailable");
|
|
}
|
|
Error zlib::uncompress(StringRef InputBuffer,
|
|
SmallVectorImpl<char> &UncompressedBuffer,
|
|
size_t UncompressedSize) {
|
|
llvm_unreachable("zlib::uncompress is unavailable");
|
|
}
|
|
uint32_t zlib::crc32(StringRef Buffer) {
|
|
llvm_unreachable("zlib::crc32 is unavailable");
|
|
}
|
|
#endif
|