You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
395 lines
9.4 KiB
395 lines
9.4 KiB
/* mz_strm_zlib.c -- Stream for zlib inflate/deflate |
|
Version 2.3.3, June 10, 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 |
|
|
|
/***************************************************************************/ |
|
|
|
static 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; |
|
|
|
MZ_UNUSED(path); |
|
|
|
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) < (int64_t)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*)(intptr_t)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) |
|
{ |
|
MZ_UNUSED(stream); |
|
|
|
return MZ_STREAM_ERROR; |
|
} |
|
|
|
int32_t mz_stream_zlib_seek(void *stream, int64_t offset, int32_t origin) |
|
{ |
|
MZ_UNUSED(stream); |
|
MZ_UNUSED(offset); |
|
MZ_UNUSED(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 *)MZ_ALLOC(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) |
|
MZ_FREE(zlib); |
|
*stream = NULL; |
|
} |
|
|
|
void *mz_stream_zlib_get_interface(void) |
|
{ |
|
return (void *)&mz_stream_zlib_vtbl; |
|
} |
|
|
|
static int64_t mz_stream_zlib_crc32(int64_t value, const void *buf, int32_t size) |
|
{ |
|
return crc32(/*(z_crc_t)*/value, buf, size); |
|
} |
|
|
|
void *mz_stream_zlib_get_crc32_table(void) |
|
{ |
|
return (void *)get_crc_table(); |
|
} |
|
|
|
void *mz_stream_zlib_get_crc32_update(void) |
|
{ |
|
return (void *)mz_stream_zlib_crc32; |
|
}
|
|
|