dolphin/Externals/minizip/mz_strm_libcomp.c

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/* mz_strm_libcomp.c -- Stream for apple compression
part of the minizip-ng project
Copyright (C) 2010-2021 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_libcomp.h"
#include <compression.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 method;
} 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;
compression_algorithm algorithm = 0;
MZ_UNUSED(path);
if (libcomp->method == 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
}
if (libcomp->method == MZ_COMPRESS_METHOD_DEFLATE)
algorithm = COMPRESSION_ZLIB;
else if (libcomp->method == MZ_COMPRESS_METHOD_XZ)
algorithm = COMPRESSION_LZMA;
else
return MZ_SUPPORT_ERROR;
err = compression_stream_init(&libcomp->cstream, (compression_stream_operation)operation, 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
MZ_UNUSED(stream);
MZ_UNUSED(buf);
MZ_UNUSED(size);
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 = sizeof(libcomp->buffer);
int32_t read = 0;
int32_t err = MZ_OK;
int16_t flags = 0;
libcomp->cstream.dst_ptr = buf;
libcomp->cstream.dst_size = (size_t)size;
do {
if (libcomp->cstream.src_size == 0) {
if (libcomp->max_total_in > 0) {
if ((int64_t)bytes_to_read > (libcomp->max_total_in - libcomp->total_in))
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)
flags = COMPRESSION_STREAM_FINALIZE;
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, flags);
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 = MZ_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 != MZ_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_METHOD:
libcomp->method = (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;
}