Add lbzip2 2.6.5

Makefile

@@ -974,6 +974,14 @@ else
 endif
 
 
+ifeq "$(DONT_BUILD_LBZIP2)" "1"
+    DEFINES += -DBENCH_REMOVE_LBZIP2
+else
+    LBZIP2_FILES += bwt/lbzip2/crctab.o bwt/lbzip2/decode.o bwt/lbzip2/divbwt.o
+    LBZIP2_FILES += bwt/lbzip2/encode.o bwt/lbzip2/parse.o bwt/lbzip2/lbzip2_lzbench.o
+endif
+
+
 ifeq "$(DONT_BUILD_BZIP3)" "1"
     DEFINES += -DBENCH_REMOVE_BZIP3
 else
@@ -1140,7 +1148,7 @@ endif # ifeq "$(ENABLE_CUDA)"
 
 MKDIR = mkdir -p
 
-lzbench: $(BUGGY_C_FILES) $(BUGGY_CC_FILES) $(BUGGY_CXX_FILES) $(ACEAPEX_FILES) $(BSC_C_FILES) $(BSC_CXX_FILES) $(BSC_CUDA_FILES) $(ACEAPEX_CUDA_FILES) $(GPUCOMPACT_FILES) $(BZIP2_FILES) $(BZIP3_FILES) $(CSC_FILES) $(KANZI_FILES) $(FASTLZMA2_OBJ) $(ZSTD_FILES) $(LZSSE_FILES) $(LZFSE_FILES) $(XZ_FILES) $(LIBLZG_FILES) $(BRIEFLZ_FILES) $(LZF_FILES) $(BROTLI_FILES) $(LZMA_FILES) $(ZLING_FILES) $(QUICKLZ_FILES) $(OPENZL_C_FILES) $(OPENZL_S_FILES) $(SNAPPY_FILES) $(ZLIB_FILES) $(ZLIB_NG_FILES) $(LZHAM_FILES) $(LZO_FILES) $(UCL_FILES) $(LZ4_FILES) $(LIZARD_FILES) $(LIBDEFLATE_FILES) $(ZXC_FILES) $(MISA77_FILES) $(MISC_FILES) $(NVCOMP_FILES) $(PPMD_FILES) $(BENCH_FILES) $(SKIM_FILE)
+lzbench: $(BUGGY_C_FILES) $(BUGGY_CC_FILES) $(BUGGY_CXX_FILES) $(ACEAPEX_FILES) $(BSC_C_FILES) $(BSC_CXX_FILES) $(BSC_CUDA_FILES) $(ACEAPEX_CUDA_FILES) $(GPUCOMPACT_FILES) $(BZIP2_FILES) $(BZIP3_FILES) $(LBZIP2_FILES) $(CSC_FILES) $(KANZI_FILES) $(FASTLZMA2_OBJ) $(ZSTD_FILES) $(LZSSE_FILES) $(LZFSE_FILES) $(XZ_FILES) $(LIBLZG_FILES) $(BRIEFLZ_FILES) $(LZF_FILES) $(BROTLI_FILES) $(LZMA_FILES) $(ZLING_FILES) $(QUICKLZ_FILES) $(OPENZL_C_FILES) $(OPENZL_S_FILES) $(SNAPPY_FILES) $(ZLIB_FILES) $(ZLIB_NG_FILES) $(LZHAM_FILES) $(LZO_FILES) $(UCL_FILES) $(LZ4_FILES) $(LIZARD_FILES) $(LIBDEFLATE_FILES) $(ZXC_FILES) $(MISA77_FILES) $(MISC_FILES) $(NVCOMP_FILES) $(PPMD_FILES) $(BENCH_FILES) $(SKIM_FILE)
 	$(CXX) $^ -o $@ $(LDFLAGS) $(LDFLAGS_LIBDL)
 	@echo Linked GCC_VERSION=$(GCC_VERSION) CLANG_VERSION=$(CLANG_VERSION) COMPILER=$(COMPILER)
 
@@ -1190,6 +1198,13 @@ $(BUGGY_CXX_FILES): %.o : %.cpp
 	@$(MKDIR) $(dir $@)
 	$(CXX) $(CFLAGS_O2) $< -c -o $@
 
+# -Ibwt/lbzip2 also picks up the <arpa/inet.h> shim there, which MinGW needs.
+# zstd's dictBuilder exports a divbwt() too, and xmalloc() is a name anything
+# might take, so rename both rather than patch the vendored source.
+$(LBZIP2_FILES): %.o : %.c
+	@$(MKDIR) $(dir $@)
+	$(CC) $(CFLAGS) -Ibwt/lbzip2 -Ddivbwt=lbzip2_divbwt -Dxmalloc=lbzip2_xmalloc $< -c -o $@
+
 $(BZIP3_FILES): %.o : %.c
 	@$(MKDIR) $(dir $@)
 	$(CC) $(CFLAGS) -DVERSION=\"1.5.3\" -Ibwt/bzip3/include $< -c -o $@

README.md

@@ -72,6 +72,7 @@ Notes column says otherwise.
 | [glza 0.12](https://encode.su/threads/2427-GLZA) | 2026-03-23 | |
 | [gpucompact 1.0](https://github.com/UDPSendToFailed/gpucompact) | 2026-07-27 | CUDA only |
 | [kanzi 2.5.3](https://github.com/flanglet/kanzi-cpp) | 2026-04-22 | |
+| [lbzip2 2.6.5](https://github.com/caius72/lbzip2) | 2026-08-18 | bzip2 format; benchmarked single-threaded |
 | [libdeflate v1.25](https://github.com/ebiggers/libdeflate) | 2025-11-01 | |
 | [lizard v2.1](https://github.com/inikep/lizard) | 2025-01-26 | |
 | [lz4/lz4hc v1.10.0](https://github.com/lz4/lz4) | 2024-07-21 | |

bench/codecs.h

@@ -79,6 +79,15 @@ int64_t lzbench_memcpy(char *inbuf, size_t insize, char *outbuf, size_t outsize,
 #endif // BENCH_REMOVE_BZIP2
 
 
+#ifndef BENCH_REMOVE_LBZIP2
+    int64_t lzbench_lbzip2_compress(char *inbuf, size_t insize, char *outbuf, size_t outsize, codec_options_t *codec_options);
+    int64_t lzbench_lbzip2_decompress(char *inbuf, size_t insize, char *outbuf, size_t outsize, codec_options_t *codec_options);
+#else
+    #define lzbench_lbzip2_compress NULL
+    #define lzbench_lbzip2_decompress NULL
+#endif // BENCH_REMOVE_LBZIP2
+
+
 #ifndef BENCH_REMOVE_BZIP3
     int64_t lzbench_bzip3_compress(char *inbuf, size_t insize, char *outbuf, size_t outsize, codec_options_t *codec_options);
     int64_t lzbench_bzip3_decompress(char *inbuf, size_t insize, char *outbuf, size_t outsize, codec_options_t *codec_options);

bench/lzbench.h

@@ -204,6 +204,7 @@ static const compressor_desc_t comp_desc[] =
     { "gpucompact", "gpucompact 1.0",          1,   5,    0,  NO_THREADING,  lzbench_gpucompact_compress, lzbench_gpucompact_decompress, lzbench_gpucompact_init,  lzbench_gpucompact_deinit },
 #endif
     { "kanzi",      "kanzi 2.5.3",             1,   9,    0, FULL_THREADING, lzbench_kanzi_compress,      lzbench_kanzi_decompress,      NULL,                    NULL },
+    { "lbzip2",     "lbzip2 2.6.5",            1,   9,    0,  BENCH_POOL_MT, lzbench_lbzip2_compress,     lzbench_lbzip2_decompress,     NULL,                    NULL },
     { "libdeflate", "libdeflate 1.25",         1,  12,    0,  BENCH_POOL_MT, lzbench_libdeflate_compress, lzbench_libdeflate_decompress, NULL,                    NULL },
     { "lizard",     "lizard 2.1",             10,  49,    0,  BENCH_POOL_MT, lzbench_lizard_compress,     lzbench_lizard_decompress,     NULL,                    NULL },
     { "lz4",        "lz4 1.10.0",              0,   0,    0,  BENCH_POOL_MT, lzbench_lz4_compress,        lzbench_lz4_decompress,        NULL,                    NULL },

bench/symmetric_codecs.cpp

@@ -153,6 +153,24 @@ int64_t lzbench_bzip2_decompress(char *inbuf, size_t insize, char *outbuf, size_
 #endif // BENCH_REMOVE_BZIP2
 
 
+#ifndef BENCH_REMOVE_LBZIP2
+#include "bwt/lbzip2/lbzip2_lzbench.h"
+
+int64_t lzbench_lbzip2_compress(char *inbuf, size_t insize, char *outbuf, size_t outsize, codec_options_t *codec_options)
+{
+   size_t res = lbzip2_buf_compress(inbuf, insize, outbuf, outsize, codec_options->level);
+   return res ? (int64_t)res : -1;
+}
+
+int64_t lzbench_lbzip2_decompress(char *inbuf, size_t insize, char *outbuf, size_t outsize, codec_options_t *codec_options)
+{
+   size_t res = lbzip2_buf_decompress(inbuf, insize, outbuf, outsize);
+   return res ? (int64_t)res : -1;
+}
+
+#endif // BENCH_REMOVE_LBZIP2
+
+
 #ifndef BENCH_REMOVE_BZIP3
 #include "bwt/bzip3/include/libbz3.h"