1 //===--- Compression.cpp - Compression implementation ---------------------===//
8 //===----------------------------------------------------------------------===//
12 //===----------------------------------------------------------------------===//
21 #include <zlib.h>
27 static int encodeZlibCompressionLevel(zlib::CompressionLevel Level) {  in encodeZlibCompressionLevel()  argument
28   switch (Level) {  in encodeZlibCompressionLevel()
29     case zlib::NoCompression: return 0;  in encodeZlibCompressionLevel()
30     case zlib::BestSpeedCompression: return 1;  in encodeZlibCompressionLevel()
31     case zlib::DefaultCompression: return Z_DEFAULT_COMPRESSION;  in encodeZlibCompressionLevel()
32     case zlib::BestSizeCompression: return 9;  in encodeZlibCompressionLevel()
34   llvm_unreachable("Invalid zlib::CompressionLevel!");  in encodeZlibCompressionLevel()
37 static zlib::Status encodeZlibReturnValue(int ReturnValue) {  in encodeZlibReturnValue()
39     case Z_OK: return zlib::StatusOK;  in encodeZlibReturnValue()
40     case Z_MEM_ERROR: return zlib::StatusOutOfMemory;  in encodeZlibReturnValue()
41     case Z_BUF_ERROR: return zlib::StatusBufferTooShort;  in encodeZlibReturnValue()
42     case Z_STREAM_ERROR: return zlib::StatusInvalidArg;  in encodeZlibReturnValue()
43     case Z_DATA_ERROR: return zlib::StatusInvalidData;  in encodeZlibReturnValue()
44     default: llvm_unreachable("unknown zlib return status!");  in encodeZlibReturnValue()
48 bool zlib::isAvailable() { return true; }  in isAvailable()
49 zlib::Status zlib::compress(StringRef InputBuffer,  in compress()
51                             CompressionLevel Level) {  in compress()  argument
54   int CLevel = encodeZlibCompressionLevel(Level);  in compress()
58   // Tell MemorySanitizer that zlib output buffer is fully initialized.  in compress()
59   // This avoids a false report when running LLVM with uninstrumented ZLib.  in compress()
65 zlib::Status zlib::uncompress(StringRef InputBuffer,  in uncompress()
72   // Tell MemorySanitizer that zlib output buffer is fully initialized.  in uncompress()
73   // This avoids a false report when running LLVM with uninstrumented ZLib.  in uncompress()
79 uint32_t zlib::crc32(StringRef Buffer) {  in crc32()
84 bool zlib::isAvailable() { return false; }  in isAvailable()
85 zlib::Status zlib::compress(StringRef InputBuffer,  in compress()
87                             CompressionLevel Level) {  in compress()  argument
88   return zlib::StatusUnsupported;  in compress()
90 zlib::Status zlib::uncompress(StringRef InputBuffer,  in uncompress()
93   return zlib::StatusUnsupported;  in uncompress()
95 uint32_t zlib::crc32(StringRef Buffer) {  in crc32()
96   llvm_unreachable("zlib::crc32 is unavailable");  in crc32()