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382 lines (307 loc) · 9.17 KB
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/* mz_strm_zlib.c -- Stream for zlib inflate/deflate
Version 2.2.7, January 30th, 2018
part of the MiniZip project
Copyright (C) 2010-2018 Nathan Moinvaziri
https://github.com/nmoinvaz/minizip
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 <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "zlib.h"
#include "mz.h"
#include "mz_strm.h"
#include "mz_strm_zlib.h"
/***************************************************************************/
#ifndef DEF_MEM_LEVEL
# if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
# else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
# endif
#endif
/***************************************************************************/
mz_stream_vtbl mz_stream_zlib_vtbl = {
mz_stream_zlib_open,
mz_stream_zlib_is_open,
mz_stream_zlib_read,
mz_stream_zlib_write,
mz_stream_zlib_tell,
mz_stream_zlib_seek,
mz_stream_zlib_close,
mz_stream_zlib_error,
mz_stream_zlib_create,
mz_stream_zlib_delete,
mz_stream_zlib_get_prop_int64,
mz_stream_zlib_set_prop_int64
};
/***************************************************************************/
typedef struct mz_stream_zlib_s {
mz_stream stream;
z_stream zstream;
uint8_t buffer[INT16_MAX];
int32_t buffer_len;
int64_t total_in;
int64_t total_out;
int64_t max_total_in;
int8_t initialized;
int16_t level;
int32_t mode;
int32_t error;
} mz_stream_zlib;
/***************************************************************************/
int32_t mz_stream_zlib_open(void *stream, const char *path, int32_t mode)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
zlib->zstream.data_type = Z_BINARY;
zlib->zstream.zalloc = Z_NULL;
zlib->zstream.zfree = Z_NULL;
zlib->zstream.opaque = Z_NULL;
zlib->zstream.total_in = 0;
zlib->zstream.total_out = 0;
zlib->total_in = 0;
zlib->total_out = 0;
if (mode & MZ_OPEN_MODE_WRITE)
{
zlib->zstream.next_out = zlib->buffer;
zlib->zstream.avail_out = sizeof(zlib->buffer);
zlib->error = deflateInit2(&zlib->zstream, (int8_t)zlib->level, Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
}
else if (mode & MZ_OPEN_MODE_READ)
{
zlib->zstream.next_in = zlib->buffer;
zlib->zstream.avail_in = 0;
zlib->error = inflateInit2(&zlib->zstream, -MAX_WBITS);
}
if (zlib->error != Z_OK)
return MZ_STREAM_ERROR;
zlib->initialized = 1;
zlib->mode = mode;
return MZ_OK;
}
int32_t mz_stream_zlib_is_open(void *stream)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
if (zlib->initialized != 1)
return MZ_STREAM_ERROR;
return MZ_OK;
}
int32_t mz_stream_zlib_read(void *stream, void *buf, int32_t size)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)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;
uint32_t total_in = 0;
uint32_t total_out = 0;
uint32_t in_bytes = 0;
uint32_t out_bytes = 0;
int32_t bytes_to_read = 0;
int32_t read = 0;
int32_t err = Z_OK;
zlib->zstream.next_out = (Bytef*)buf;
zlib->zstream.avail_out = (uInt)size;
do
{
if (zlib->zstream.avail_in == 0)
{
bytes_to_read = sizeof(zlib->buffer);
if (zlib->max_total_in > 0)
{
if ((zlib->max_total_in - zlib->total_in) < sizeof(zlib->buffer))
bytes_to_read = (int32_t)(zlib->max_total_in - zlib->total_in);
}
read = mz_stream_read(zlib->stream.base, zlib->buffer, bytes_to_read);
if (read < 0)
{
zlib->error = Z_STREAM_ERROR;
break;
}
if (read == 0)
break;
zlib->zstream.next_in = zlib->buffer;
zlib->zstream.avail_in = read;
}
total_in_before = zlib->zstream.avail_in;
total_out_before = zlib->zstream.total_out;
err = inflate(&zlib->zstream, Z_SYNC_FLUSH);
if ((err >= Z_OK) && (zlib->zstream.msg != NULL))
{
zlib->error = Z_DATA_ERROR;
break;
}
total_in_after = zlib->zstream.avail_in;
total_out_after = zlib->zstream.total_out;
in_bytes = (uint32_t)(total_in_before - total_in_after);
out_bytes = (uint32_t)(total_out_after - total_out_before);
total_in += in_bytes;
total_out += out_bytes;
zlib->total_in += in_bytes;
zlib->total_out += out_bytes;
if (err == Z_STREAM_END)
break;
if (err != Z_OK)
{
zlib->error = err;
break;
}
}
while (zlib->zstream.avail_out > 0);
if (zlib->error != 0)
return zlib->error;
return total_out;
}
static int32_t mz_stream_zlib_flush(void *stream)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
if (mz_stream_write(zlib->stream.base, zlib->buffer, zlib->buffer_len) != zlib->buffer_len)
return MZ_STREAM_ERROR;
return MZ_OK;
}
static int32_t mz_stream_zlib_deflate(void *stream, int flush)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
uint64_t total_out_before = 0;
uint64_t total_out_after = 0;
int32_t out_bytes = 0;
int32_t err = Z_OK;
do
{
if (zlib->zstream.avail_out == 0)
{
if (mz_stream_zlib_flush(zlib) != MZ_OK)
{
zlib->error = Z_STREAM_ERROR;
return MZ_STREAM_ERROR;
}
zlib->zstream.avail_out = sizeof(zlib->buffer);
zlib->zstream.next_out = zlib->buffer;
zlib->buffer_len = 0;
}
total_out_before = zlib->zstream.total_out;
err = deflate(&zlib->zstream, flush);
total_out_after = zlib->zstream.total_out;
out_bytes = (uint32_t)(total_out_after - total_out_before);
zlib->buffer_len += out_bytes;
zlib->total_out += out_bytes;
if (err == Z_STREAM_END)
break;
if (err != Z_OK)
{
zlib->error = err;
return MZ_STREAM_ERROR;
}
}
while ((zlib->zstream.avail_in > 0) || (flush == Z_FINISH && err == Z_OK));
return MZ_OK;
}
int32_t mz_stream_zlib_write(void *stream, const void *buf, int32_t size)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
zlib->zstream.next_in = (Bytef*)buf;
zlib->zstream.avail_in = (uInt)size;
mz_stream_zlib_deflate(stream, Z_NO_FLUSH);
zlib->total_in += size;
return size;
}
int64_t mz_stream_zlib_tell(void *stream)
{
return MZ_STREAM_ERROR;
}
int32_t mz_stream_zlib_seek(void *stream, int64_t offset, int32_t origin)
{
return MZ_STREAM_ERROR;
}
int32_t mz_stream_zlib_close(void *stream)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
if (zlib->mode & MZ_OPEN_MODE_WRITE)
{
mz_stream_zlib_deflate(stream, Z_FINISH);
mz_stream_zlib_flush(stream);
deflateEnd(&zlib->zstream);
}
else if (zlib->mode & MZ_OPEN_MODE_READ)
{
inflateEnd(&zlib->zstream);
}
zlib->initialized = 0;
if (zlib->error != Z_OK)
return MZ_STREAM_ERROR;
return MZ_OK;
}
int32_t mz_stream_zlib_error(void *stream)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
return zlib->error;
}
int32_t mz_stream_zlib_get_prop_int64(void *stream, int32_t prop, int64_t *value)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
switch (prop)
{
case MZ_STREAM_PROP_TOTAL_IN:
*value = zlib->total_in;
return MZ_OK;
case MZ_STREAM_PROP_TOTAL_OUT:
*value = zlib->total_out;
return MZ_OK;
case MZ_STREAM_PROP_HEADER_SIZE:
*value = 0;
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
int32_t mz_stream_zlib_set_prop_int64(void *stream, int32_t prop, int64_t value)
{
mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
switch (prop)
{
case MZ_STREAM_PROP_COMPRESS_LEVEL:
zlib->level = (int16_t)value;
return MZ_OK;
case MZ_STREAM_PROP_TOTAL_IN_MAX:
zlib->max_total_in = value;
return MZ_OK;
}
return MZ_EXIST_ERROR;
}
void *mz_stream_zlib_create(void **stream)
{
mz_stream_zlib *zlib = NULL;
zlib = (mz_stream_zlib *)malloc(sizeof(mz_stream_zlib));
if (zlib != NULL)
{
memset(zlib, 0, sizeof(mz_stream_zlib));
zlib->stream.vtbl = &mz_stream_zlib_vtbl;
zlib->level = Z_DEFAULT_COMPRESSION;
}
if (stream != NULL)
*stream = zlib;
return zlib;
}
void mz_stream_zlib_delete(void **stream)
{
mz_stream_zlib *zlib = NULL;
if (stream == NULL)
return;
zlib = (mz_stream_zlib *)*stream;
if (zlib != NULL)
free(zlib);
*stream = NULL;
}
void *mz_stream_zlib_get_interface(void)
{
return (void *)&mz_stream_zlib_vtbl;
}
static int32_t mz_stream_zlib_crc32(int32_t value, const void *buf, int32_t size)
{
return crc32(value, buf, size);
}
void *mz_stream_zlib_get_crc32_update(void)
{
return (void *)mz_stream_zlib_crc32;
}