mirror of
https://github.com/dolphin-emu/dolphin.git
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374 lines
9.8 KiB
C
374 lines
9.8 KiB
C
/* mz_strm_bzip.c -- Stream for bzip inflate/deflate
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part of the minizip-ng project
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Copyright (C) 2010-2021 Nathan Moinvaziri
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https://github.com/zlib-ng/minizip-ng
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This program is distributed under the terms of the same license as zlib.
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See the accompanying LICENSE file for the full text of the license.
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*/
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#include "mz.h"
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#include "mz_strm.h"
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#include "mz_strm_bzip.h"
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#include "bzlib.h"
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/***************************************************************************/
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static mz_stream_vtbl mz_stream_bzip_vtbl = {
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mz_stream_bzip_open,
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mz_stream_bzip_is_open,
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mz_stream_bzip_read,
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mz_stream_bzip_write,
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mz_stream_bzip_tell,
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mz_stream_bzip_seek,
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mz_stream_bzip_close,
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mz_stream_bzip_error,
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mz_stream_bzip_create,
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mz_stream_bzip_delete,
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mz_stream_bzip_get_prop_int64,
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mz_stream_bzip_set_prop_int64
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};
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/***************************************************************************/
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typedef struct mz_stream_bzip_s {
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mz_stream stream;
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bz_stream bzstream;
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int32_t mode;
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int32_t error;
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uint8_t buffer[INT16_MAX];
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int32_t buffer_len;
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int16_t stream_end;
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int64_t total_in;
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int64_t total_out;
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int64_t max_total_in;
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int8_t initialized;
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int16_t level;
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} mz_stream_bzip;
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/***************************************************************************/
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int32_t mz_stream_bzip_open(void *stream, const char *path, int32_t mode) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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MZ_UNUSED(path);
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bzip->bzstream.bzalloc = 0;
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bzip->bzstream.bzfree = 0;
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bzip->bzstream.opaque = 0;
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bzip->bzstream.total_in_lo32 = 0;
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bzip->bzstream.total_in_hi32 = 0;
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bzip->bzstream.total_out_lo32 = 0;
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bzip->bzstream.total_out_hi32 = 0;
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bzip->total_in = 0;
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bzip->total_out = 0;
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if (mode & MZ_OPEN_MODE_WRITE) {
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#ifdef MZ_ZIP_NO_COMPRESSION
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return MZ_SUPPORT_ERROR;
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#else
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bzip->bzstream.next_out = (char *)bzip->buffer;
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bzip->bzstream.avail_out = sizeof(bzip->buffer);
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bzip->error = BZ2_bzCompressInit(&bzip->bzstream, bzip->level, 0, 0);
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#endif
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} else if (mode & MZ_OPEN_MODE_READ) {
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#ifdef MZ_ZIP_NO_DECOMPRESSION
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return MZ_SUPPORT_ERROR;
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#else
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bzip->bzstream.next_in = (char *)bzip->buffer;
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bzip->bzstream.avail_in = 0;
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bzip->error = BZ2_bzDecompressInit(&bzip->bzstream, 0, 0);
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#endif
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}
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if (bzip->error != BZ_OK)
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return MZ_OPEN_ERROR;
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bzip->initialized = 1;
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bzip->stream_end = 0;
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bzip->mode = mode;
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return MZ_OK;
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}
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int32_t mz_stream_bzip_is_open(void *stream) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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if (bzip->initialized != 1)
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return MZ_OPEN_ERROR;
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return MZ_OK;
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}
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int32_t mz_stream_bzip_read(void *stream, void *buf, int32_t size) {
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#ifdef MZ_ZIP_NO_DECOMPRESSION
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MZ_UNUSED(stream);
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MZ_UNUSED(buf);
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MZ_UNUSED(size);
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return MZ_SUPPORT_ERROR;
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#else
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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uint64_t total_in_before = 0;
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uint64_t total_out_before = 0;
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uint64_t total_in_after = 0;
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uint64_t total_out_after = 0;
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int32_t total_in = 0;
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int32_t total_out = 0;
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int32_t in_bytes = 0;
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int32_t out_bytes = 0;
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int32_t bytes_to_read = sizeof(bzip->buffer);
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int32_t read = 0;
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int32_t err = BZ_OK;
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if (bzip->stream_end)
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return 0;
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bzip->bzstream.next_out = (char *)buf;
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bzip->bzstream.avail_out = (unsigned int)size;
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do {
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if (bzip->bzstream.avail_in == 0) {
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if (bzip->max_total_in > 0) {
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if ((int64_t)bytes_to_read > (bzip->max_total_in - bzip->total_in))
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bytes_to_read = (int32_t)(bzip->max_total_in - bzip->total_in);
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}
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read = mz_stream_read(bzip->stream.base, bzip->buffer, bytes_to_read);
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if (read < 0)
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return read;
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bzip->bzstream.next_in = (char *)bzip->buffer;
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bzip->bzstream.avail_in = (uint32_t)read;
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}
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total_in_before = bzip->bzstream.avail_in;
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total_out_before = bzip->bzstream.total_out_lo32 +
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(((uint64_t)bzip->bzstream.total_out_hi32) << 32);
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err = BZ2_bzDecompress(&bzip->bzstream);
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total_in_after = bzip->bzstream.avail_in;
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total_out_after = bzip->bzstream.total_out_lo32 +
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(((uint64_t)bzip->bzstream.total_out_hi32) << 32);
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in_bytes = (int32_t)(total_in_before - total_in_after);
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out_bytes = (int32_t)(total_out_after - total_out_before);
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total_in += in_bytes;
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total_out += out_bytes;
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bzip->total_in += in_bytes;
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bzip->total_out += out_bytes;
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if (err == BZ_STREAM_END) {
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bzip->stream_end = 1;
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break;
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}
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if (err != BZ_OK && err != BZ_RUN_OK) {
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bzip->error = err;
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break;
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}
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} while (bzip->bzstream.avail_out > 0);
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if (bzip->error != 0)
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return MZ_DATA_ERROR;
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return total_out;
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#endif
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}
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#ifndef MZ_ZIP_NO_COMPRESSION
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static int32_t mz_stream_bzip_flush(void *stream) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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if (mz_stream_write(bzip->stream.base, bzip->buffer, bzip->buffer_len) != bzip->buffer_len)
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return MZ_WRITE_ERROR;
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return MZ_OK;
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}
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static int32_t mz_stream_bzip_compress(void *stream, int flush) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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uint64_t total_out_before = 0;
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uint64_t total_out_after = 0;
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uint32_t out_bytes = 0;
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int32_t err = BZ_OK;
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do {
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if (bzip->bzstream.avail_out == 0) {
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err = mz_stream_bzip_flush(bzip);
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if (err != MZ_OK)
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return err;
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bzip->bzstream.avail_out = sizeof(bzip->buffer);
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bzip->bzstream.next_out = (char *)bzip->buffer;
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bzip->buffer_len = 0;
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}
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total_out_before = bzip->bzstream.total_out_lo32 +
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(((uint64_t)bzip->bzstream.total_out_hi32) << 32);
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err = BZ2_bzCompress(&bzip->bzstream, flush);
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total_out_after = bzip->bzstream.total_out_lo32 +
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(((uint64_t)bzip->bzstream.total_out_hi32) << 32);
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out_bytes = (uint32_t)(total_out_after - total_out_before);
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bzip->buffer_len += out_bytes;
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bzip->total_out += out_bytes;
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if (err == BZ_STREAM_END)
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break;
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if (err < 0) {
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bzip->error = err;
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return MZ_DATA_ERROR;
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}
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} while ((bzip->bzstream.avail_in > 0) || (flush == BZ_FINISH && err == BZ_FINISH_OK));
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return MZ_OK;
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}
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#endif
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int32_t mz_stream_bzip_write(void *stream, const void *buf, int32_t size) {
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#ifdef MZ_ZIP_NO_COMPRESSION
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MZ_UNUSED(stream);
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MZ_UNUSED(buf);
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MZ_UNUSED(size);
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return MZ_SUPPORT_ERROR;
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#else
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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int32_t err = MZ_OK;
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bzip->bzstream.next_in = (char *)(intptr_t)buf;
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bzip->bzstream.avail_in = (unsigned int)size;
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err = mz_stream_bzip_compress(stream, BZ_RUN);
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if (err != MZ_OK) {
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return err;
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}
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bzip->total_in += size;
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return size;
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#endif
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}
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int64_t mz_stream_bzip_tell(void *stream) {
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MZ_UNUSED(stream);
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return MZ_TELL_ERROR;
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}
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int32_t mz_stream_bzip_seek(void *stream, int64_t offset, int32_t origin) {
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MZ_UNUSED(stream);
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MZ_UNUSED(offset);
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MZ_UNUSED(origin);
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return MZ_SEEK_ERROR;
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}
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int32_t mz_stream_bzip_close(void *stream) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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if (bzip->mode & MZ_OPEN_MODE_WRITE) {
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#ifdef MZ_ZIP_NO_COMPRESSION
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return MZ_SUPPORT_ERROR;
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#else
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mz_stream_bzip_compress(stream, BZ_FINISH);
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mz_stream_bzip_flush(stream);
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BZ2_bzCompressEnd(&bzip->bzstream);
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#endif
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} else if (bzip->mode & MZ_OPEN_MODE_READ) {
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#ifdef MZ_ZIP_NO_DECOMPRESSION
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return MZ_SUPPORT_ERROR;
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#else
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BZ2_bzDecompressEnd(&bzip->bzstream);
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#endif
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}
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bzip->initialized = 0;
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if (bzip->error != BZ_OK)
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return MZ_CLOSE_ERROR;
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return MZ_OK;
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}
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int32_t mz_stream_bzip_error(void *stream) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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return bzip->error;
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}
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int32_t mz_stream_bzip_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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switch (prop) {
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case MZ_STREAM_PROP_TOTAL_IN:
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*value = bzip->total_in;
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break;
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case MZ_STREAM_PROP_TOTAL_IN_MAX:
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*value = bzip->max_total_in;
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break;
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case MZ_STREAM_PROP_TOTAL_OUT:
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*value = bzip->total_out;
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break;
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case MZ_STREAM_PROP_HEADER_SIZE:
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*value = 0;
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break;
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default:
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return MZ_EXIST_ERROR;
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}
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return MZ_OK;
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}
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int32_t mz_stream_bzip_set_prop_int64(void *stream, int32_t prop, int64_t value) {
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mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
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switch (prop) {
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case MZ_STREAM_PROP_COMPRESS_LEVEL:
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if (value < 0)
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bzip->level = 6;
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else
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bzip->level = (int16_t)value;
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return MZ_OK;
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case MZ_STREAM_PROP_TOTAL_IN_MAX:
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bzip->max_total_in = value;
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return MZ_OK;
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}
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return MZ_EXIST_ERROR;
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}
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void *mz_stream_bzip_create(void **stream) {
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mz_stream_bzip *bzip = NULL;
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bzip = (mz_stream_bzip *)MZ_ALLOC(sizeof(mz_stream_bzip));
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if (bzip != NULL) {
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memset(bzip, 0, sizeof(mz_stream_bzip));
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bzip->stream.vtbl = &mz_stream_bzip_vtbl;
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bzip->level = 6;
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}
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if (stream != NULL)
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*stream = bzip;
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return bzip;
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}
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void mz_stream_bzip_delete(void **stream) {
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mz_stream_bzip *bzip = NULL;
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if (stream == NULL)
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return;
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bzip = (mz_stream_bzip *)*stream;
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if (bzip != NULL)
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MZ_FREE(bzip);
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*stream = NULL;
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}
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void *mz_stream_bzip_get_interface(void) {
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return (void *)&mz_stream_bzip_vtbl;
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}
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extern void bz_internal_error(int errcode) {
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MZ_UNUSED(errcode);
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}
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