394 lines
10 KiB
C
394 lines
10 KiB
C
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/* mz_strm_zlib.c -- Stream for zlib 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_zlib.h"
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#include "zlib.h"
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#if defined(ZLIBNG_VERNUM) && !defined(ZLIB_COMPAT)
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# include "zlib-ng.h"
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#endif
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/***************************************************************************/
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#if defined(ZLIBNG_VERNUM) && !defined(ZLIB_COMPAT)
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# define ZLIB_PREFIX(x) zng_ ## x
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typedef zng_stream zlib_stream;
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#else
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# define ZLIB_PREFIX(x) x
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typedef z_stream zlib_stream;
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#endif
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#if !defined(DEF_MEM_LEVEL)
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# if MAX_MEM_LEVEL >= 8
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# define DEF_MEM_LEVEL 8
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# else
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# define DEF_MEM_LEVEL MAX_MEM_LEVEL
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# endif
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#endif
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/***************************************************************************/
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static mz_stream_vtbl mz_stream_zlib_vtbl = {
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mz_stream_zlib_open,
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mz_stream_zlib_is_open,
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mz_stream_zlib_read,
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mz_stream_zlib_write,
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mz_stream_zlib_tell,
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mz_stream_zlib_seek,
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mz_stream_zlib_close,
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mz_stream_zlib_error,
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mz_stream_zlib_create,
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mz_stream_zlib_delete,
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mz_stream_zlib_get_prop_int64,
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mz_stream_zlib_set_prop_int64
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};
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/***************************************************************************/
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typedef struct mz_stream_zlib_s {
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mz_stream stream;
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zlib_stream zstream;
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uint8_t buffer[INT16_MAX];
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int32_t buffer_len;
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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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int32_t window_bits;
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int32_t mode;
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int32_t error;
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} mz_stream_zlib;
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/***************************************************************************/
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int32_t mz_stream_zlib_open(void *stream, const char *path, int32_t mode) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
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MZ_UNUSED(path);
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zlib->zstream.data_type = Z_BINARY;
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zlib->zstream.zalloc = Z_NULL;
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zlib->zstream.zfree = Z_NULL;
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zlib->zstream.opaque = Z_NULL;
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zlib->zstream.total_in = 0;
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zlib->zstream.total_out = 0;
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zlib->total_in = 0;
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zlib->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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zlib->zstream.next_out = zlib->buffer;
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zlib->zstream.avail_out = sizeof(zlib->buffer);
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zlib->error = ZLIB_PREFIX(deflateInit2)(&zlib->zstream, (int8_t)zlib->level, Z_DEFLATED,
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zlib->window_bits, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
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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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zlib->zstream.next_in = zlib->buffer;
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zlib->zstream.avail_in = 0;
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zlib->error = ZLIB_PREFIX(inflateInit2)(&zlib->zstream, zlib->window_bits);
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#endif
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}
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if (zlib->error != Z_OK)
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return MZ_OPEN_ERROR;
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zlib->initialized = 1;
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zlib->mode = mode;
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return MZ_OK;
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}
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int32_t mz_stream_zlib_is_open(void *stream) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
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if (zlib->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_zlib_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_zlib *zlib = (mz_stream_zlib *)stream;
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uint64_t total_in_before = 0;
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uint64_t total_in_after = 0;
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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 total_in = 0;
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uint32_t total_out = 0;
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uint32_t in_bytes = 0;
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uint32_t out_bytes = 0;
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int32_t bytes_to_read = sizeof(zlib->buffer);
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int32_t read = 0;
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int32_t err = Z_OK;
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zlib->zstream.next_out = (Bytef*)buf;
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zlib->zstream.avail_out = (uInt)size;
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do {
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if (zlib->zstream.avail_in == 0) {
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if (zlib->max_total_in > 0) {
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if ((int64_t)bytes_to_read > (zlib->max_total_in - zlib->total_in))
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bytes_to_read = (int32_t)(zlib->max_total_in - zlib->total_in);
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}
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read = mz_stream_read(zlib->stream.base, zlib->buffer, bytes_to_read);
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if (read < 0)
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return read;
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zlib->zstream.next_in = zlib->buffer;
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zlib->zstream.avail_in = read;
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}
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total_in_before = zlib->zstream.avail_in;
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total_out_before = zlib->zstream.total_out;
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err = ZLIB_PREFIX(inflate)(&zlib->zstream, Z_SYNC_FLUSH);
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if ((err >= Z_OK) && (zlib->zstream.msg != NULL)) {
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zlib->error = Z_DATA_ERROR;
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break;
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}
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total_in_after = zlib->zstream.avail_in;
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total_out_after = zlib->zstream.total_out;
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in_bytes = (uint32_t)(total_in_before - total_in_after);
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out_bytes = (uint32_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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zlib->total_in += in_bytes;
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zlib->total_out += out_bytes;
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if (err == Z_STREAM_END)
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break;
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if (err != Z_OK) {
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zlib->error = err;
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break;
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}
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} while (zlib->zstream.avail_out > 0);
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if (zlib->error != 0) {
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/* Zlib errors are compatible with MZ */
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return zlib->error;
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}
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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_zlib_flush(void *stream) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
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if (mz_stream_write(zlib->stream.base, zlib->buffer, zlib->buffer_len) != zlib->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_zlib_deflate(void *stream, int flush) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)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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int32_t out_bytes = 0;
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int32_t err = Z_OK;
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do {
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if (zlib->zstream.avail_out == 0) {
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err = mz_stream_zlib_flush(zlib);
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if (err != MZ_OK)
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return err;
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zlib->zstream.avail_out = sizeof(zlib->buffer);
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zlib->zstream.next_out = zlib->buffer;
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zlib->buffer_len = 0;
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}
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total_out_before = zlib->zstream.total_out;
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err = ZLIB_PREFIX(deflate)(&zlib->zstream, flush);
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total_out_after = zlib->zstream.total_out;
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out_bytes = (uint32_t)(total_out_after - total_out_before);
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zlib->buffer_len += out_bytes;
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zlib->total_out += out_bytes;
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if (err == Z_STREAM_END)
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break;
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if (err != Z_OK) {
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zlib->error = err;
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return MZ_DATA_ERROR;
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}
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} while ((zlib->zstream.avail_in > 0) || (flush == Z_FINISH && err == Z_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_zlib_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_zlib *zlib = (mz_stream_zlib *)stream;
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int32_t err = MZ_OK;
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zlib->zstream.next_in = (Bytef*)(intptr_t)buf;
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zlib->zstream.avail_in = (uInt)size;
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err = mz_stream_zlib_deflate(stream, Z_NO_FLUSH);
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if (err != MZ_OK) {
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return err;
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}
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zlib->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_zlib_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_zlib_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_zlib_close(void *stream) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
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if (zlib->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_zlib_deflate(stream, Z_FINISH);
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mz_stream_zlib_flush(stream);
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ZLIB_PREFIX(deflateEnd)(&zlib->zstream);
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#endif
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} else if (zlib->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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ZLIB_PREFIX(inflateEnd)(&zlib->zstream);
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#endif
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}
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zlib->initialized = 0;
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if (zlib->error != Z_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_zlib_error(void *stream) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
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return zlib->error;
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}
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int32_t mz_stream_zlib_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
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switch (prop) {
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case MZ_STREAM_PROP_TOTAL_IN:
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*value = zlib->total_in;
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break;
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case MZ_STREAM_PROP_TOTAL_IN_MAX:
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*value = zlib->max_total_in;
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break;
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case MZ_STREAM_PROP_TOTAL_OUT:
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*value = zlib->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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case MZ_STREAM_PROP_COMPRESS_WINDOW:
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*value = zlib->window_bits;
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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_zlib_set_prop_int64(void *stream, int32_t prop, int64_t value) {
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mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
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switch (prop) {
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case MZ_STREAM_PROP_COMPRESS_LEVEL:
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zlib->level = (int16_t)value;
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break;
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case MZ_STREAM_PROP_TOTAL_IN_MAX:
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zlib->max_total_in = value;
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break;
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case MZ_STREAM_PROP_COMPRESS_WINDOW:
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zlib->window_bits = (int32_t)value;
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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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void *mz_stream_zlib_create(void **stream) {
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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;
|
||
|
|
zlib->window_bits = -MAX_WBITS;
|
||
|
|
}
|
||
|
|
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;
|
||
|
|
}
|