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Copy pathmz_strm_zstd.c
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347 lines (287 loc) · 9.25 KB
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/* mz_strm_zstd.c -- Stream for zstd compress/decompress
part of the minizip-ng project
Copyright (C) Nathan Moinvaziri
https://github.com/zlib-ng/minizip-ng
Authors: Force Charlie
https://github.com/fcharlie
This program is distributed under the terms of the same license as zlib.
See the accompanying LICENSE file for the full text of the license.
*/
#include "mz.h"
#include "mz_strm.h"
#include "mz_strm_zstd.h"
#include <zstd.h>
/***************************************************************************/
static mz_stream_vtbl mz_stream_zstd_vtbl = {
mz_stream_zstd_open,
mz_stream_zstd_is_open,
mz_stream_zstd_read,
mz_stream_zstd_write,
mz_stream_zstd_tell,
mz_stream_zstd_seek,
mz_stream_zstd_close,
mz_stream_zstd_error,
mz_stream_zstd_create,
mz_stream_zstd_delete,
mz_stream_zstd_get_prop_int64,
mz_stream_zstd_set_prop_int64
};
/***************************************************************************/
typedef struct mz_stream_zstd_s {
mz_stream stream;
ZSTD_CStream *zcstream;
ZSTD_DStream *zdstream;
ZSTD_outBuffer out;
ZSTD_inBuffer in;
int32_t mode;
int32_t error;
uint8_t buffer[INT16_MAX];
int32_t buffer_len;
int64_t total_in;
int64_t total_out;
int64_t max_total_in;
int64_t max_total_out;
int8_t initialized;
int32_t preset;
} mz_stream_zstd;
/***************************************************************************/
int32_t mz_stream_zstd_open(void *stream, const char *path, int32_t mode) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
MZ_UNUSED(path);
if (mode & MZ_OPEN_MODE_WRITE) {
#ifdef MZ_ZIP_NO_COMPRESSION
return MZ_SUPPORT_ERROR;
#else
zstd->zcstream = ZSTD_createCStream();
zstd->out.dst = zstd->buffer;
zstd->out.size = sizeof(zstd->buffer);
zstd->out.pos = 0;
ZSTD_CCtx_setParameter(zstd->zcstream, ZSTD_c_compressionLevel, zstd->preset);
#endif
} else if (mode & MZ_OPEN_MODE_READ) {
#ifdef MZ_ZIP_NO_DECOMPRESSION
return MZ_SUPPORT_ERROR;
#else
zstd->zdstream = ZSTD_createDStream();
memset(&zstd->out, 0, sizeof(ZSTD_outBuffer));
#endif
}
memset(&zstd->in, 0, sizeof(ZSTD_inBuffer));
zstd->initialized = 1;
zstd->mode = mode;
zstd->error = MZ_OK;
return MZ_OK;
}
int32_t mz_stream_zstd_is_open(void *stream) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
if (zstd->initialized != 1)
return MZ_OPEN_ERROR;
return MZ_OK;
}
int32_t mz_stream_zstd_read(void *stream, void *buf, int32_t size) {
#ifdef MZ_ZIP_NO_DECOMPRESSION
MZ_UNUSED(stream);
MZ_UNUSED(buf);
MZ_UNUSED(size);
return MZ_SUPPORT_ERROR;
#else
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
uint64_t total_in_before = 0;
uint64_t total_in_after = 0;
uint64_t total_out_before = 0;
uint64_t total_out_after = 0;
int32_t total_out = 0;
int32_t in_bytes = 0;
int32_t out_bytes = 0;
int32_t bytes_to_read = sizeof(zstd->buffer);
int32_t read = 0;
size_t result = 0;
zstd->out.dst = (void *)buf;
zstd->out.size = (size_t)size;
zstd->out.pos = 0;
do {
if (zstd->in.pos == zstd->in.size) {
if (zstd->max_total_in > 0) {
if ((int64_t)bytes_to_read > (zstd->max_total_in - zstd->total_in))
bytes_to_read = (int32_t)(zstd->max_total_in - zstd->total_in);
}
read = mz_stream_read(zstd->stream.base, zstd->buffer, bytes_to_read);
if (read < 0)
return read;
zstd->in.src = (const void *)zstd->buffer;
zstd->in.pos = 0;
zstd->in.size = (size_t)read;
}
total_in_before = zstd->in.pos;
total_out_before = zstd->out.pos;
result = ZSTD_decompressStream(zstd->zdstream, &zstd->out, &zstd->in);
if (ZSTD_isError(result)) {
zstd->error = (int32_t)result;
return MZ_DATA_ERROR;
}
total_in_after = zstd->in.pos;
total_out_after = zstd->out.pos;
if ((zstd->max_total_out != -1) && (int64_t)total_out_after > zstd->max_total_out)
total_out_after = (uint64_t)zstd->max_total_out;
in_bytes = (int32_t)(total_in_after - total_in_before);
out_bytes = (int32_t)(total_out_after - total_out_before);
total_out += out_bytes;
zstd->total_in += in_bytes;
zstd->total_out += out_bytes;
} while ((zstd->in.size > 0 || out_bytes > 0) && (zstd->out.pos < zstd->out.size));
return total_out;
#endif
}
#ifndef MZ_ZIP_NO_COMPRESSION
static int32_t mz_stream_zstd_flush(void *stream) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
if (mz_stream_write(zstd->stream.base, zstd->buffer, zstd->buffer_len) != zstd->buffer_len)
return MZ_WRITE_ERROR;
return MZ_OK;
}
static int32_t mz_stream_zstd_compress(void *stream, ZSTD_EndDirective flush) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
uint64_t total_out_before = 0;
uint64_t total_out_after = 0;
int32_t out_bytes = 0;
size_t result = 0;
int32_t err = 0;
do {
if (zstd->out.pos == zstd->out.size) {
err = mz_stream_zstd_flush(zstd);
if (err != MZ_OK)
return err;
zstd->out.dst = zstd->buffer;
zstd->out.size = sizeof(zstd->buffer);
zstd->out.pos = 0;
zstd->buffer_len = 0;
}
total_out_before = zstd->out.pos;
result = ZSTD_compressStream2(zstd->zcstream, &zstd->out, &zstd->in, flush);
total_out_after = zstd->out.pos;
out_bytes = (uint32_t)(total_out_after - total_out_before);
zstd->buffer_len += out_bytes;
zstd->total_out += out_bytes;
if (ZSTD_isError(result)) {
zstd->error = (int32_t)result;
return MZ_DATA_ERROR;
}
} while ((zstd->in.pos < zstd->in.size) || (flush == ZSTD_e_end && result != 0));
return MZ_OK;
}
#endif
int32_t mz_stream_zstd_write(void *stream, const void *buf, int32_t size) {
#ifdef MZ_ZIP_NO_COMPRESSION
MZ_UNUSED(stream);
MZ_UNUSED(buf);
MZ_UNUSED(size);
return MZ_SUPPORT_ERROR;
#else
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
int32_t err = MZ_OK;
zstd->in.src = buf;
zstd->in.pos = 0;
zstd->in.size = size;
err = mz_stream_zstd_compress(stream, ZSTD_e_continue);
if (err != MZ_OK) {
return err;
}
zstd->total_in += size;
return size;
#endif
}
int64_t mz_stream_zstd_tell(void *stream) {
MZ_UNUSED(stream);
return MZ_TELL_ERROR;
}
int32_t mz_stream_zstd_seek(void *stream, int64_t offset, int32_t origin) {
MZ_UNUSED(stream);
MZ_UNUSED(offset);
MZ_UNUSED(origin);
return MZ_SEEK_ERROR;
}
int32_t mz_stream_zstd_close(void *stream) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
if (zstd->mode & MZ_OPEN_MODE_WRITE) {
#ifdef MZ_ZIP_NO_COMPRESSION
return MZ_SUPPORT_ERROR;
#else
mz_stream_zstd_compress(stream, ZSTD_e_end);
mz_stream_zstd_flush(stream);
ZSTD_freeCStream(zstd->zcstream);
zstd->zcstream = NULL;
#endif
} else if (zstd->mode & MZ_OPEN_MODE_READ) {
#ifdef MZ_ZIP_NO_DECOMPRESSION
return MZ_SUPPORT_ERROR;
#else
ZSTD_freeDStream(zstd->zdstream);
zstd->zdstream = NULL;
#endif
}
zstd->initialized = 0;
return MZ_OK;
}
int32_t mz_stream_zstd_error(void *stream) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
return zstd->error;
}
int32_t mz_stream_zstd_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
switch (prop) {
case MZ_STREAM_PROP_TOTAL_IN:
*value = zstd->total_in;
break;
case MZ_STREAM_PROP_TOTAL_IN_MAX:
*value = zstd->max_total_in;
break;
case MZ_STREAM_PROP_TOTAL_OUT:
*value = zstd->total_out;
break;
case MZ_STREAM_PROP_TOTAL_OUT_MAX:
*value = zstd->max_total_out;
break;
case MZ_STREAM_PROP_HEADER_SIZE:
*value = 0;
break;
default:
return MZ_EXIST_ERROR;
}
return MZ_OK;
}
int32_t mz_stream_zstd_set_prop_int64(void *stream, int32_t prop, int64_t value) {
mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
switch (prop) {
case MZ_STREAM_PROP_COMPRESS_LEVEL:
if (value == MZ_COMPRESS_LEVEL_DEFAULT)
zstd->preset = ZSTD_CLEVEL_DEFAULT;
else
zstd->preset = (int16_t)value;
return MZ_OK;
case MZ_STREAM_PROP_TOTAL_IN_MAX:
zstd->max_total_in = value;
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
void *mz_stream_zstd_create(void) {
mz_stream_zstd *zstd = (mz_stream_zstd *)calloc(1, sizeof(mz_stream_zstd));
if (zstd) {
zstd->stream.vtbl = &mz_stream_zstd_vtbl;
zstd->max_total_out = -1;
zstd->preset = ZSTD_CLEVEL_DEFAULT;
}
return zstd;
}
void mz_stream_zstd_delete(void **stream) {
mz_stream_zstd *zstd = NULL;
if (!stream)
return;
zstd = (mz_stream_zstd *)*stream;
if (zstd)
free(zstd);
*stream = NULL;
}
void *mz_stream_zstd_get_interface(void) {
return (void *)&mz_stream_zstd_vtbl;
}