| /* mz_strm_zlib.c -- Stream for zlib inflate/deflate |
| Version 2.7.5, November 13, 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 <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) |
| { |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| 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); |
| #endif |
| } |
| else if (mode & MZ_OPEN_MODE_READ) |
| { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| zlib->zstream.next_in = zlib->buffer; |
| zlib->zstream.avail_in = 0; |
| |
| zlib->error = inflateInit2(&zlib->zstream, -MAX_WBITS); |
| #endif |
| } |
| |
| if (zlib->error != Z_OK) |
| return MZ_OPEN_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_OPEN_ERROR; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_zlib_read(void *stream, void *buf, int32_t size) |
| { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| 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) |
| return read; |
| |
| 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) |
| { |
| // Zlib errors are compatible with MZ |
| return zlib->error; |
| } |
| |
| return total_out; |
| #endif |
| } |
| |
| 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_WRITE_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) |
| { |
| err = mz_stream_zlib_flush(zlib); |
| if (err != MZ_OK) |
| return err; |
| |
| 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_DATA_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; |
| int32_t err = size; |
| |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| MZ_UNUSED(zlib); |
| err = MZ_SUPPORT_ERROR; |
| #else |
| 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; |
| #endif |
| return err; |
| } |
| |
| int64_t mz_stream_zlib_tell(void *stream) |
| { |
| MZ_UNUSED(stream); |
| |
| return MZ_TELL_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_SEEK_ERROR; |
| } |
| |
| int32_t mz_stream_zlib_close(void *stream) |
| { |
| mz_stream_zlib *zlib = (mz_stream_zlib *)stream; |
| |
| |
| if (zlib->mode & MZ_OPEN_MODE_WRITE) |
| { |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| mz_stream_zlib_deflate(stream, Z_FINISH); |
| mz_stream_zlib_flush(stream); |
| |
| deflateEnd(&zlib->zstream); |
| #endif |
| } |
| else if (zlib->mode & MZ_OPEN_MODE_READ) |
| { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| inflateEnd(&zlib->zstream); |
| #endif |
| } |
| |
| zlib->initialized = 0; |
| |
| if (zlib->error != Z_OK) |
| return MZ_CLOSE_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; |
| break; |
| case MZ_STREAM_PROP_TOTAL_IN_MAX: |
| *value = zlib->max_total_in; |
| break; |
| case MZ_STREAM_PROP_TOTAL_OUT: |
| *value = zlib->total_out; |
| break; |
| case MZ_STREAM_PROP_HEADER_SIZE: |
| *value = 0; |
| break; |
| default: |
| return MZ_EXIST_ERROR; |
| } |
| return MZ_OK; |
| } |
| |
| 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; |
| break; |
| case MZ_STREAM_PROP_TOTAL_IN_MAX: |
| zlib->max_total_in = value; |
| break; |
| default: |
| return MZ_EXIST_ERROR; |
| } |
| return MZ_OK; |
| } |
| |
| 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; |
| } |