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356 lines
9.7 KiB
C
356 lines
9.7 KiB
C
/* mz_strm_libcomp.c -- Stream for apple compression
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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_libcomp.h"
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#include <compression.h>
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/***************************************************************************/
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static mz_stream_vtbl mz_stream_libcomp_vtbl = {
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mz_stream_libcomp_open,
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mz_stream_libcomp_is_open,
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mz_stream_libcomp_read,
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mz_stream_libcomp_write,
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mz_stream_libcomp_tell,
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mz_stream_libcomp_seek,
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mz_stream_libcomp_close,
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mz_stream_libcomp_error,
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mz_stream_libcomp_create,
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mz_stream_libcomp_delete,
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mz_stream_libcomp_get_prop_int64,
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mz_stream_libcomp_set_prop_int64
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};
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/***************************************************************************/
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typedef struct mz_stream_libcomp_s {
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mz_stream stream;
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compression_stream
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cstream;
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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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int32_t mode;
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int32_t error;
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int16_t method;
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} mz_stream_libcomp;
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/***************************************************************************/
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int32_t mz_stream_libcomp_open(void *stream, const char *path, int32_t mode) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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int32_t err = 0;
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int16_t operation = 0;
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compression_algorithm algorithm = 0;
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MZ_UNUSED(path);
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if (libcomp->method == 0)
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return MZ_PARAM_ERROR;
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libcomp->total_in = 0;
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libcomp->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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operation = COMPRESSION_STREAM_ENCODE;
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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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operation = COMPRESSION_STREAM_DECODE;
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#endif
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}
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if (libcomp->method == MZ_COMPRESS_METHOD_DEFLATE)
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algorithm = COMPRESSION_ZLIB;
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else if (libcomp->method == MZ_COMPRESS_METHOD_XZ)
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algorithm = COMPRESSION_LZMA;
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else
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return MZ_SUPPORT_ERROR;
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err = compression_stream_init(&libcomp->cstream, (compression_stream_operation)operation, algorithm);
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if (err == COMPRESSION_STATUS_ERROR) {
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libcomp->error = err;
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return MZ_OPEN_ERROR;
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}
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libcomp->initialized = 1;
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libcomp->mode = mode;
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return MZ_OK;
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}
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int32_t mz_stream_libcomp_is_open(void *stream) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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if (libcomp->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_libcomp_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_libcomp *libcomp = (mz_stream_libcomp *)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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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(libcomp->buffer);
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int32_t read = 0;
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int32_t err = MZ_OK;
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int16_t flags = 0;
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libcomp->cstream.dst_ptr = buf;
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libcomp->cstream.dst_size = (size_t)size;
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do {
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if (libcomp->cstream.src_size == 0) {
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if (libcomp->max_total_in > 0) {
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if ((int64_t)bytes_to_read > (libcomp->max_total_in - libcomp->total_in))
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bytes_to_read = (int32_t)(libcomp->max_total_in - libcomp->total_in);
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}
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read = mz_stream_read(libcomp->stream.base, libcomp->buffer, bytes_to_read);
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if (read < 0)
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return read;
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if (read == 0)
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flags = COMPRESSION_STREAM_FINALIZE;
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libcomp->cstream.src_ptr = libcomp->buffer;
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libcomp->cstream.src_size = (size_t)read;
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}
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total_in_before = libcomp->cstream.src_size;
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total_out_before = libcomp->cstream.dst_size;
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err = compression_stream_process(&libcomp->cstream, flags);
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if (err == COMPRESSION_STATUS_ERROR) {
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libcomp->error = err;
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break;
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}
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total_in_after = libcomp->cstream.src_size;
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total_out_after = libcomp->cstream.dst_size;
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in_bytes = (int32_t)(total_in_before - total_in_after);
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out_bytes = (int32_t)(total_out_before - total_out_after);
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total_in += in_bytes;
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total_out += out_bytes;
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libcomp->total_in += in_bytes;
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libcomp->total_out += out_bytes;
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if (err == COMPRESSION_STATUS_END)
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break;
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if (err != COMPRESSION_STATUS_OK) {
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libcomp->error = err;
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break;
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}
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} while (libcomp->cstream.dst_size > 0);
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if (libcomp->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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static int32_t mz_stream_libcomp_flush(void *stream) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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if (mz_stream_write(libcomp->stream.base, libcomp->buffer, libcomp->buffer_len) != libcomp->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_libcomp_deflate(void *stream, int flush) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)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 = MZ_OK;
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do {
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if (libcomp->cstream.dst_size == 0) {
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err = mz_stream_libcomp_flush(libcomp);
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if (err != MZ_OK) {
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libcomp->error = err;
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return err;
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}
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libcomp->cstream.dst_size = sizeof(libcomp->buffer);
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libcomp->cstream.dst_ptr = libcomp->buffer;
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libcomp->buffer_len = 0;
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}
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total_out_before = libcomp->cstream.dst_size;
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err = compression_stream_process(&libcomp->cstream, flush);
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total_out_after = libcomp->cstream.dst_size;
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out_bytes = (uint32_t)(total_out_before - total_out_after);
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libcomp->buffer_len += out_bytes;
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libcomp->total_out += out_bytes;
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if (err == COMPRESSION_STATUS_END)
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break;
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if (err != COMPRESSION_STATUS_OK) {
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libcomp->error = err;
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return MZ_DATA_ERROR;
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}
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} while ((libcomp->cstream.src_size > 0) || (flush == COMPRESSION_STREAM_FINALIZE && err == COMPRESSION_STATUS_OK));
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return MZ_OK;
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}
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int32_t mz_stream_libcomp_write(void *stream, const void *buf, int32_t size) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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int32_t err = size;
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#ifdef MZ_ZIP_NO_COMPRESSION
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MZ_UNUSED(libcomp);
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err = MZ_SUPPORT_ERROR;
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#else
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libcomp->cstream.src_ptr = buf;
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libcomp->cstream.src_size = (size_t)size;
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mz_stream_libcomp_deflate(stream, 0);
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libcomp->total_in += size;
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#endif
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return err;
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}
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int64_t mz_stream_libcomp_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_libcomp_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_libcomp_close(void *stream) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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if (libcomp->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_libcomp_deflate(stream, COMPRESSION_STREAM_FINALIZE);
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mz_stream_libcomp_flush(stream);
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#endif
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} else if (libcomp->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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#endif
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}
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compression_stream_destroy(&libcomp->cstream);
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libcomp->initialized = 0;
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if (libcomp->error != MZ_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_libcomp_error(void *stream) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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return libcomp->error;
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}
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int32_t mz_stream_libcomp_get_prop_int64(void *stream, int32_t prop, int64_t *value) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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switch (prop) {
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case MZ_STREAM_PROP_TOTAL_IN:
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*value = libcomp->total_in;
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break;
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case MZ_STREAM_PROP_TOTAL_IN_MAX:
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*value = libcomp->max_total_in;
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break;
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case MZ_STREAM_PROP_TOTAL_OUT:
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*value = libcomp->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_libcomp_set_prop_int64(void *stream, int32_t prop, int64_t value) {
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mz_stream_libcomp *libcomp = (mz_stream_libcomp *)stream;
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switch (prop) {
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case MZ_STREAM_PROP_COMPRESS_METHOD:
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libcomp->method = (int16_t)value;
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break;
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case MZ_STREAM_PROP_TOTAL_IN_MAX:
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libcomp->max_total_in = 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_libcomp_create(void **stream) {
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mz_stream_libcomp *libcomp = NULL;
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libcomp = (mz_stream_libcomp *)MZ_ALLOC(sizeof(mz_stream_libcomp));
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if (libcomp != NULL) {
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memset(libcomp, 0, sizeof(mz_stream_libcomp));
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libcomp->stream.vtbl = &mz_stream_libcomp_vtbl;
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}
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if (stream != NULL)
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*stream = libcomp;
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return libcomp;
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}
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void mz_stream_libcomp_delete(void **stream) {
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mz_stream_libcomp *libcomp = NULL;
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if (stream == NULL)
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return;
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libcomp = (mz_stream_libcomp *)*stream;
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if (libcomp != NULL)
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MZ_FREE(libcomp);
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*stream = NULL;
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}
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