| /* mz_strm_libcomp.c -- Stream for apple compression |
| 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 <compression.h> |
| |
| #include "zlib.h" |
| |
| #include "mz.h" |
| #include "mz_strm.h" |
| #include "mz_strm_libcomp.h" |
| |
| /***************************************************************************/ |
| |
| static mz_stream_vtbl mz_stream_libcomp_vtbl = { |
| mz_stream_libcomp_open, |
| mz_stream_libcomp_is_open, |
| mz_stream_libcomp_read, |
| mz_stream_libcomp_write, |
| mz_stream_libcomp_tell, |
| mz_stream_libcomp_seek, |
| mz_stream_libcomp_close, |
| mz_stream_libcomp_error, |
| mz_stream_libcomp_create, |
| mz_stream_libcomp_delete, |
| mz_stream_libcomp_get_prop_int64, |
| mz_stream_libcomp_set_prop_int64 |
| }; |
| |
| /***************************************************************************/ |
| |
| typedef struct mz_stream_libcomp_s { |
| mz_stream stream; |
| compression_stream |
| cstream; |
| 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; |
| int32_t mode; |
| int32_t error; |
| int16_t algorithm; |
| } mz_stream_libcomp; |
| |
| /***************************************************************************/ |
| |
| int32_t mz_stream_libcomp_open(void *stream, const char *path, int32_t mode) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| int32_t err = 0; |
| int16_t operation = 0; |
| |
| MZ_UNUSED(path); |
| |
| if (libcomp->algorithm == 0) |
| return MZ_PARAM_ERROR; |
| |
| libcomp->total_in = 0; |
| libcomp->total_out = 0; |
| |
| if (mode & MZ_OPEN_MODE_WRITE) |
| { |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| operation = COMPRESSION_STREAM_ENCODE; |
| #endif |
| } |
| else if (mode & MZ_OPEN_MODE_READ) |
| { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| operation = COMPRESSION_STREAM_DECODE; |
| #endif |
| } |
| |
| err = compression_stream_init(&libcomp->cstream, (compression_stream_operation)operation, |
| (compression_algorithm)libcomp->algorithm); |
| |
| if (err == COMPRESSION_STATUS_ERROR) |
| { |
| libcomp->error = err; |
| return MZ_OPEN_ERROR; |
| } |
| |
| libcomp->initialized = 1; |
| libcomp->mode = mode; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_libcomp_is_open(void *stream) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| if (libcomp->initialized != 1) |
| return MZ_OPEN_ERROR; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_libcomp_read(void *stream, void *buf, int32_t size) |
| { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)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_in = 0; |
| int32_t total_out = 0; |
| int32_t in_bytes = 0; |
| int32_t out_bytes = 0; |
| int32_t bytes_to_read = 0; |
| int32_t read = 0; |
| int32_t err = Z_OK; |
| |
| |
| libcomp->cstream.dst_ptr = buf; |
| libcomp->cstream.dst_size = (size_t)size; |
| |
| do |
| { |
| if (libcomp->cstream.src_size == 0) |
| { |
| bytes_to_read = sizeof(libcomp->buffer); |
| if (libcomp->max_total_in > 0) |
| { |
| if ((libcomp->max_total_in - libcomp->total_in) < (int64_t)sizeof(libcomp->buffer)) |
| bytes_to_read = (int32_t)(libcomp->max_total_in - libcomp->total_in); |
| } |
| |
| read = mz_stream_read(libcomp->stream.base, libcomp->buffer, bytes_to_read); |
| |
| if (read < 0) |
| return read; |
| if (read == 0) |
| break; |
| |
| libcomp->cstream.src_ptr = libcomp->buffer; |
| libcomp->cstream.src_size = (size_t)read; |
| } |
| |
| total_in_before = libcomp->cstream.src_size; |
| total_out_before = libcomp->cstream.dst_size; |
| |
| err = compression_stream_process(&libcomp->cstream, 0); |
| if (err == COMPRESSION_STATUS_ERROR) |
| { |
| libcomp->error = err; |
| break; |
| } |
| |
| total_in_after = libcomp->cstream.src_size; |
| total_out_after = libcomp->cstream.dst_size; |
| |
| in_bytes = (int32_t)(total_in_before - total_in_after); |
| out_bytes = (int32_t)(total_out_before - total_out_after); |
| |
| total_in += in_bytes; |
| total_out += out_bytes; |
| |
| libcomp->total_in += in_bytes; |
| libcomp->total_out += out_bytes; |
| |
| if (err == COMPRESSION_STATUS_END) |
| break; |
| if (err != COMPRESSION_STATUS_OK) |
| { |
| libcomp->error = err; |
| break; |
| } |
| } |
| while (libcomp->cstream.dst_size > 0); |
| |
| if (libcomp->error != 0) |
| return MZ_DATA_ERROR; |
| |
| return total_out; |
| #endif |
| } |
| |
| static int32_t mz_stream_libcomp_flush(void *stream) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| if (mz_stream_write(libcomp->stream.base, libcomp->buffer, libcomp->buffer_len) != libcomp->buffer_len) |
| return MZ_WRITE_ERROR; |
| return MZ_OK; |
| } |
| |
| static int32_t mz_stream_libcomp_deflate(void *stream, int flush) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| uint64_t total_out_before = 0; |
| uint64_t total_out_after = 0; |
| uint32_t out_bytes = 0; |
| int32_t err = Z_OK; |
| |
| |
| do |
| { |
| if (libcomp->cstream.dst_size == 0) |
| { |
| err = mz_stream_libcomp_flush(libcomp); |
| if (err != MZ_OK) |
| { |
| libcomp->error = err; |
| return err; |
| } |
| |
| libcomp->cstream.dst_size = sizeof(libcomp->buffer); |
| libcomp->cstream.dst_ptr = libcomp->buffer; |
| |
| libcomp->buffer_len = 0; |
| } |
| |
| total_out_before = libcomp->cstream.dst_size; |
| err = compression_stream_process(&libcomp->cstream, flush); |
| total_out_after = libcomp->cstream.dst_size; |
| |
| out_bytes = (uint32_t)(total_out_before - total_out_after); |
| |
| libcomp->buffer_len += out_bytes; |
| libcomp->total_out += out_bytes; |
| |
| if (err == COMPRESSION_STATUS_END) |
| break; |
| if (err != COMPRESSION_STATUS_OK) |
| { |
| libcomp->error = err; |
| return MZ_DATA_ERROR; |
| } |
| } |
| while ((libcomp->cstream.src_size > 0) || (flush == COMPRESSION_STREAM_FINALIZE && err == COMPRESSION_STATUS_OK)); |
| |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_libcomp_write(void *stream, const void *buf, int32_t size) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| int32_t err = size; |
| |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| MZ_UNUSED(libcomp); |
| err = MZ_SUPPORT_ERROR; |
| #else |
| libcomp->cstream.src_ptr = buf; |
| libcomp->cstream.src_size = (size_t)size; |
| |
| mz_stream_libcomp_deflate(stream, 0); |
| |
| libcomp->total_in += size; |
| #endif |
| return err; |
| } |
| |
| int64_t mz_stream_libcomp_tell(void *stream) |
| { |
| MZ_UNUSED(stream); |
| |
| return MZ_TELL_ERROR; |
| } |
| |
| int32_t mz_stream_libcomp_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_libcomp_close(void *stream) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| |
| |
| if (libcomp->mode & MZ_OPEN_MODE_WRITE) |
| { |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| mz_stream_libcomp_deflate(stream, COMPRESSION_STREAM_FINALIZE); |
| mz_stream_libcomp_flush(stream); |
| #endif |
| } |
| else if (libcomp->mode & MZ_OPEN_MODE_READ) |
| { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #endif |
| } |
| |
| compression_stream_destroy(&libcomp->cstream); |
| |
| libcomp->initialized = 0; |
| |
| if (libcomp->error != Z_OK) |
| return MZ_CLOSE_ERROR; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_libcomp_error(void *stream) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| return libcomp->error; |
| } |
| |
| int32_t mz_stream_libcomp_get_prop_int64(void *stream, int32_t prop, int64_t *value) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| switch (prop) |
| { |
| case MZ_STREAM_PROP_TOTAL_IN: |
| *value = libcomp->total_in; |
| break; |
| case MZ_STREAM_PROP_TOTAL_IN_MAX: |
| *value = libcomp->max_total_in; |
| break; |
| case MZ_STREAM_PROP_TOTAL_OUT: |
| *value = libcomp->total_out; |
| break; |
| case MZ_STREAM_PROP_HEADER_SIZE: |
| *value = 0; |
| break; |
| default: |
| return MZ_EXIST_ERROR; |
| } |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_libcomp_set_prop_int64(void *stream, int32_t prop, int64_t value) |
| { |
| mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream; |
| switch (prop) |
| { |
| case MZ_STREAM_PROP_COMPRESS_ALGORITHM: |
| libcomp->algorithm = (int16_t)value; |
| break; |
| case MZ_STREAM_PROP_TOTAL_IN_MAX: |
| libcomp->max_total_in = value; |
| break; |
| default: |
| return MZ_EXIST_ERROR; |
| } |
| return MZ_OK; |
| } |
| |
| void *mz_stream_libcomp_create(void **stream) |
| { |
| mz_stream_libcomp *libcomp = NULL; |
| |
| libcomp = (mz_stream_libcomp *)MZ_ALLOC(sizeof(mz_stream_libcomp)); |
| if (libcomp != NULL) |
| { |
| memset(libcomp, 0, sizeof(mz_stream_libcomp)); |
| libcomp->stream.vtbl = &mz_stream_libcomp_vtbl; |
| } |
| if (stream != NULL) |
| *stream = libcomp; |
| |
| return libcomp; |
| } |
| |
| void mz_stream_libcomp_delete(void **stream) |
| { |
| mz_stream_libcomp *libcomp = NULL; |
| if (stream == NULL) |
| return; |
| libcomp = (mz_stream_libcomp *)*stream; |
| if (libcomp != NULL) |
| MZ_FREE(libcomp); |
| *stream = NULL; |
| } |
| |
| /***************************************************************************/ |
| |
| // Define z_crc_t in zlib 1.2.5 and less |
| #if (ZLIB_VERNUM < 0x1270) |
| typedef unsigned long z_crc_t; |
| #endif |
| |
| /***************************************************************************/ |
| |
| static mz_stream_vtbl mz_stream_zlib_vtbl = { |
| mz_stream_libcomp_open, |
| mz_stream_libcomp_is_open, |
| mz_stream_libcomp_read, |
| mz_stream_libcomp_write, |
| mz_stream_libcomp_tell, |
| mz_stream_libcomp_seek, |
| mz_stream_libcomp_close, |
| mz_stream_libcomp_error, |
| mz_stream_zlib_create, |
| mz_stream_libcomp_delete, |
| mz_stream_libcomp_get_prop_int64, |
| mz_stream_libcomp_set_prop_int64 |
| }; |
| |
| void *mz_stream_zlib_create(void **stream) |
| { |
| mz_stream_libcomp *libcomp = NULL; |
| void *stream_int = NULL; |
| mz_stream_libcomp_create(&stream_int); |
| if (stream_int != NULL) |
| { |
| libcomp = (mz_stream_libcomp *)stream_int; |
| libcomp->stream.vtbl = &mz_stream_zlib_vtbl; |
| libcomp->algorithm = COMPRESSION_ZLIB; |
| } |
| if (stream != NULL) |
| *stream = stream_int; |
| return stream_int; |
| } |
| |
| 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 (int64_t)crc32((z_crc_t)value, buf, (uint32_t)size); |
| } |
| |
| void *mz_stream_zlib_get_crc32_update(void) |
| { |
| return (void *)mz_stream_zlib_crc32; |
| } |