| /* mz_strm_bzip.c -- Stream for bzip inflate/deflate |
| part of the minizip-ng project |
| |
| Copyright (C) Nathan Moinvaziri |
| https://github.com/zlib-ng/minizip-ng |
| |
| 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_bzip.h" |
| |
| #include "bzlib.h" |
| |
| /***************************************************************************/ |
| |
| static mz_stream_vtbl mz_stream_bzip_vtbl = { |
| mz_stream_bzip_open, |
| mz_stream_bzip_is_open, |
| mz_stream_bzip_read, |
| mz_stream_bzip_write, |
| mz_stream_bzip_tell, |
| mz_stream_bzip_seek, |
| mz_stream_bzip_close, |
| mz_stream_bzip_error, |
| mz_stream_bzip_create, |
| mz_stream_bzip_delete, |
| mz_stream_bzip_get_prop_int64, |
| mz_stream_bzip_set_prop_int64 |
| }; |
| |
| /***************************************************************************/ |
| |
| typedef struct mz_stream_bzip_s { |
| mz_stream stream; |
| bz_stream bzstream; |
| int32_t mode; |
| int32_t error; |
| uint8_t buffer[INT16_MAX]; |
| int32_t buffer_len; |
| int16_t stream_end; |
| int64_t total_in; |
| int64_t total_out; |
| int64_t max_total_in; |
| int8_t initialized; |
| int16_t level; |
| } mz_stream_bzip; |
| |
| /***************************************************************************/ |
| |
| int32_t mz_stream_bzip_open(void *stream, const char *path, int32_t mode) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| |
| MZ_UNUSED(path); |
| |
| bzip->bzstream.bzalloc = 0; |
| bzip->bzstream.bzfree = 0; |
| bzip->bzstream.opaque = 0; |
| bzip->bzstream.total_in_lo32 = 0; |
| bzip->bzstream.total_in_hi32 = 0; |
| bzip->bzstream.total_out_lo32 = 0; |
| bzip->bzstream.total_out_hi32 = 0; |
| |
| bzip->total_in = 0; |
| bzip->total_out = 0; |
| |
| if (mode & MZ_OPEN_MODE_WRITE) { |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| bzip->bzstream.next_out = (char *)bzip->buffer; |
| bzip->bzstream.avail_out = sizeof(bzip->buffer); |
| |
| bzip->error = BZ2_bzCompressInit(&bzip->bzstream, bzip->level, 0, 0); |
| #endif |
| } else if (mode & MZ_OPEN_MODE_READ) { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| bzip->bzstream.next_in = (char *)bzip->buffer; |
| bzip->bzstream.avail_in = 0; |
| |
| bzip->error = BZ2_bzDecompressInit(&bzip->bzstream, 0, 0); |
| #endif |
| } |
| |
| if (bzip->error != BZ_OK) |
| return MZ_OPEN_ERROR; |
| |
| bzip->initialized = 1; |
| bzip->stream_end = 0; |
| bzip->mode = mode; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_bzip_is_open(void *stream) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| if (bzip->initialized != 1) |
| return MZ_OPEN_ERROR; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_bzip_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_bzip *bzip = (mz_stream_bzip *)stream; |
| uint64_t total_in_before = 0; |
| uint64_t total_out_before = 0; |
| uint64_t total_in_after = 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 = sizeof(bzip->buffer); |
| int32_t read = 0; |
| int32_t err = BZ_OK; |
| |
| if (bzip->stream_end) |
| return 0; |
| |
| bzip->bzstream.next_out = (char *)buf; |
| bzip->bzstream.avail_out = (unsigned int)size; |
| |
| do { |
| if (bzip->bzstream.avail_in == 0) { |
| if (bzip->max_total_in > 0) { |
| if ((int64_t)bytes_to_read > (bzip->max_total_in - bzip->total_in)) |
| bytes_to_read = (int32_t)(bzip->max_total_in - bzip->total_in); |
| } |
| |
| read = mz_stream_read(bzip->stream.base, bzip->buffer, bytes_to_read); |
| |
| if (read < 0) |
| return read; |
| |
| bzip->bzstream.next_in = (char *)bzip->buffer; |
| bzip->bzstream.avail_in = (uint32_t)read; |
| } |
| |
| total_in_before = bzip->bzstream.avail_in; |
| total_out_before = bzip->bzstream.total_out_lo32 + |
| (((uint64_t)bzip->bzstream.total_out_hi32) << 32); |
| |
| err = BZ2_bzDecompress(&bzip->bzstream); |
| |
| total_in_after = bzip->bzstream.avail_in; |
| total_out_after = bzip->bzstream.total_out_lo32 + |
| (((uint64_t)bzip->bzstream.total_out_hi32) << 32); |
| |
| in_bytes = (int32_t)(total_in_before - total_in_after); |
| out_bytes = (int32_t)(total_out_after - total_out_before); |
| |
| total_in += in_bytes; |
| total_out += out_bytes; |
| |
| bzip->total_in += in_bytes; |
| bzip->total_out += out_bytes; |
| |
| if (err == BZ_STREAM_END) { |
| bzip->stream_end = 1; |
| break; |
| } |
| if (err != BZ_OK && err != BZ_RUN_OK) { |
| bzip->error = err; |
| break; |
| } |
| } while (bzip->bzstream.avail_out > 0); |
| |
| if (bzip->error != 0) |
| return MZ_DATA_ERROR; |
| |
| return total_out; |
| #endif |
| } |
| |
| #ifndef MZ_ZIP_NO_COMPRESSION |
| static int32_t mz_stream_bzip_flush(void *stream) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| if (mz_stream_write(bzip->stream.base, bzip->buffer, bzip->buffer_len) != bzip->buffer_len) |
| return MZ_WRITE_ERROR; |
| return MZ_OK; |
| } |
| |
| static int32_t mz_stream_bzip_compress(void *stream, int flush) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| uint64_t total_out_before = 0; |
| uint64_t total_out_after = 0; |
| uint32_t out_bytes = 0; |
| int32_t err = BZ_OK; |
| |
| do { |
| if (bzip->bzstream.avail_out == 0) { |
| err = mz_stream_bzip_flush(bzip); |
| if (err != MZ_OK) |
| return err; |
| |
| bzip->bzstream.avail_out = sizeof(bzip->buffer); |
| bzip->bzstream.next_out = (char *)bzip->buffer; |
| |
| bzip->buffer_len = 0; |
| } |
| |
| total_out_before = bzip->bzstream.total_out_lo32 + |
| (((uint64_t)bzip->bzstream.total_out_hi32) << 32); |
| |
| err = BZ2_bzCompress(&bzip->bzstream, flush); |
| |
| total_out_after = bzip->bzstream.total_out_lo32 + |
| (((uint64_t)bzip->bzstream.total_out_hi32) << 32); |
| |
| out_bytes = (uint32_t)(total_out_after - total_out_before); |
| |
| bzip->buffer_len += out_bytes; |
| bzip->total_out += out_bytes; |
| |
| if (err == BZ_STREAM_END) |
| break; |
| if (err < 0) { |
| bzip->error = err; |
| return MZ_DATA_ERROR; |
| } |
| } while ((bzip->bzstream.avail_in > 0) || (flush == BZ_FINISH && err == BZ_FINISH_OK)); |
| |
| return MZ_OK; |
| } |
| #endif |
| |
| int32_t mz_stream_bzip_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_bzip *bzip = (mz_stream_bzip *)stream; |
| int32_t err = MZ_OK; |
| |
| bzip->bzstream.next_in = (char *)(intptr_t)buf; |
| bzip->bzstream.avail_in = (unsigned int)size; |
| |
| err = mz_stream_bzip_compress(stream, BZ_RUN); |
| if (err != MZ_OK) { |
| return err; |
| } |
| |
| bzip->total_in += size; |
| return size; |
| #endif |
| } |
| |
| int64_t mz_stream_bzip_tell(void *stream) { |
| MZ_UNUSED(stream); |
| |
| return MZ_TELL_ERROR; |
| } |
| |
| int32_t mz_stream_bzip_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_bzip_close(void *stream) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| |
| if (bzip->mode & MZ_OPEN_MODE_WRITE) { |
| #ifdef MZ_ZIP_NO_COMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| mz_stream_bzip_compress(stream, BZ_FINISH); |
| mz_stream_bzip_flush(stream); |
| |
| BZ2_bzCompressEnd(&bzip->bzstream); |
| #endif |
| } else if (bzip->mode & MZ_OPEN_MODE_READ) { |
| #ifdef MZ_ZIP_NO_DECOMPRESSION |
| return MZ_SUPPORT_ERROR; |
| #else |
| BZ2_bzDecompressEnd(&bzip->bzstream); |
| #endif |
| } |
| |
| bzip->initialized = 0; |
| |
| if (bzip->error != BZ_OK) |
| return MZ_CLOSE_ERROR; |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_bzip_error(void *stream) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| return bzip->error; |
| } |
| |
| int32_t mz_stream_bzip_get_prop_int64(void *stream, int32_t prop, int64_t *value) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| switch (prop) { |
| case MZ_STREAM_PROP_TOTAL_IN: |
| *value = bzip->total_in; |
| break; |
| case MZ_STREAM_PROP_TOTAL_IN_MAX: |
| *value = bzip->max_total_in; |
| break; |
| case MZ_STREAM_PROP_TOTAL_OUT: |
| *value = bzip->total_out; |
| break; |
| case MZ_STREAM_PROP_HEADER_SIZE: |
| *value = 0; |
| break; |
| default: |
| return MZ_EXIST_ERROR; |
| } |
| return MZ_OK; |
| } |
| |
| int32_t mz_stream_bzip_set_prop_int64(void *stream, int32_t prop, int64_t value) { |
| mz_stream_bzip *bzip = (mz_stream_bzip *)stream; |
| switch (prop) { |
| case MZ_STREAM_PROP_COMPRESS_LEVEL: |
| if (value < 0) |
| bzip->level = 6; |
| else |
| bzip->level = (int16_t)value; |
| return MZ_OK; |
| case MZ_STREAM_PROP_TOTAL_IN_MAX: |
| bzip->max_total_in = value; |
| return MZ_OK; |
| } |
| return MZ_EXIST_ERROR; |
| } |
| |
| void *mz_stream_bzip_create(void **stream) { |
| mz_stream_bzip *bzip = NULL; |
| |
| bzip = (mz_stream_bzip *)calloc(1, sizeof(mz_stream_bzip)); |
| if (bzip) { |
| bzip->stream.vtbl = &mz_stream_bzip_vtbl; |
| bzip->level = 6; |
| } |
| if (stream) |
| *stream = bzip; |
| |
| return bzip; |
| } |
| |
| void mz_stream_bzip_delete(void **stream) { |
| mz_stream_bzip *bzip = NULL; |
| if (!stream) |
| return; |
| bzip = (mz_stream_bzip *)*stream; |
| if (bzip) |
| free(bzip); |
| *stream = NULL; |
| } |
| |
| void *mz_stream_bzip_get_interface(void) { |
| return (void *)&mz_stream_bzip_vtbl; |
| } |
| |
| extern void bz_internal_error(int errcode) { |
| MZ_UNUSED(errcode); |
| } |