bf8b699f64
bzip2/lz4/lzma/lzo/snappy compression is now provided via *services* they're almost like normal services, but in include/providers/ and they're supposed to provide exactly the same interface as original compression libraries (but not everything, only enough of if for the code to compile). the services are implemented via dummy functions that return corresponding error values (LZMA_PROG_ERROR, LZO_E_INTERNAL_ERROR, etc). the actual compression libraries are linked into corresponding provider plugins. Providers are daemon plugins that when loaded replace service pointers to point to actual compression functions. That is, run-time dependency on compression libraries is now on plugins, and the server doesn't need any compression libraries to run, but will automatically support the compression when a plugin is loaded. InnoDB and Mroonga use compression plugins now. RocksDB doesn't, because it comes with standalone utility binaries that cannot load plugins.
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/**
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@file lzma.h
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This service provides dynamic access to LZMA.
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*/
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#ifndef LZMA_INCLUDED
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef MYSQL_ABI_CHECK
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#include <stdbool.h>
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#include <stdint.h>
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#include <stddef.h>
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#endif
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#ifndef LZMA_VERSION
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typedef enum
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{
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LZMA_OK = 0,
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LZMA_STREAM_END = 1,
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LZMA_NO_CHECK = 2,
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LZMA_UNSUPPORTED_CHECK = 3,
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LZMA_GET_CHECK = 4,
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LZMA_MEM_ERROR = 5,
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LZMA_MEMLIMIT_ERROR = 6,
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LZMA_FORMAT_ERROR = 7,
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LZMA_OPTIONS_ERROR = 8,
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LZMA_DATA_ERROR = 9,
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LZMA_BUF_ERROR = 10,
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LZMA_PROG_ERROR = 11,
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} lzma_ret;
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typedef struct
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{
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void *(*alloc)(void *opaque, size_t nmemb, size_t size);
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void (*free)(void *opaque, void *ptr);
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void *opaque;
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} lzma_allocator;
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typedef enum
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{
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LZMA_CHECK_NONE = 0,
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LZMA_CHECK_CRC32 = 1,
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LZMA_CHECK_CRC64 = 4,
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LZMA_CHECK_SHA256 = 10
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} lzma_check;
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#define lzma_stream_buffer_decode(...) provider_service_lzma->lzma_stream_buffer_decode_ptr (__VA_ARGS__)
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#define lzma_easy_buffer_encode(...) provider_service_lzma->lzma_easy_buffer_encode_ptr (__VA_ARGS__)
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#endif
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#define DEFINE_lzma_stream_buffer_decode(NAME) NAME( \
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uint64_t *memlimit, \
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uint32_t flags, \
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const lzma_allocator *allocator, \
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const uint8_t *in, \
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size_t *in_pos, \
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size_t in_size, \
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uint8_t *out, \
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size_t *out_pos, \
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size_t out_size \
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)
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#define DEFINE_lzma_easy_buffer_encode(NAME) NAME( \
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uint32_t preset, \
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lzma_check check, \
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const lzma_allocator *allocator, \
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const uint8_t *in, \
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size_t in_size, \
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uint8_t *out, \
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size_t *out_pos, \
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size_t out_size \
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)
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struct provider_service_lzma_st
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{
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lzma_ret DEFINE_lzma_stream_buffer_decode((*lzma_stream_buffer_decode_ptr));
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lzma_ret DEFINE_lzma_easy_buffer_encode((*lzma_easy_buffer_encode_ptr));
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bool is_loaded;
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};
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extern struct provider_service_lzma_st *provider_service_lzma;
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#ifdef __cplusplus
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}
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#endif
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#define LZMA_INCLUDED
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#endif
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