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RetroArch/libretro-common/file/archive_file_7z.c

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/* Copyright (C) 2010-2016 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (archive_file_sevenzip.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <stdlib.h>
#include <file/archive_file.h>
#include <streams/file_stream.h>
#include <retro_miscellaneous.h>
#include <encodings/utf.h>
#include <encodings/crc32.h>
#include <string/stdstring.h>
#include <lists/string_list.h>
#include <file/file_path.h>
#include <compat/strl.h>
#include "../../deps/7zip/7z.h"
#include "../../deps/7zip/7zAlloc.h"
#include "../../deps/7zip/7zCrc.h"
#include "../../deps/7zip/7zFile.h"
#define SEVENZIP_MAGIC "7z\xBC\xAF\x27\x1C"
#define SEVENZIP_MAGIC_LEN 6
struct sevenzip_context_t {
CFileInStream archiveStream;
CLookToRead lookStream;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
CSzArEx db;
size_t temp_size;
uint32_t block_index;
uint32_t index;
uint32_t packIndex;
uint8_t *output;
file_archive_file_handle_t *handle;
};
static void* sevenzip_stream_new(void)
{
struct sevenzip_context_t *sevenzip_context =
(struct sevenzip_context_t*)calloc(1, sizeof(struct sevenzip_context_t));
/* These are the allocation routines - currently using
* the non-standard 7zip choices. */
sevenzip_context->allocImp.Alloc = SzAlloc;
sevenzip_context->allocImp.Free = SzFree;
sevenzip_context->allocTempImp.Alloc = SzAllocTemp;
sevenzip_context->allocTempImp.Free = SzFreeTemp;
sevenzip_context->block_index = 0xFFFFFFFF;
sevenzip_context->output = NULL;
sevenzip_context->handle = NULL;
return sevenzip_context;
}
static void sevenzip_stream_free(void *data)
{
struct sevenzip_context_t *sevenzip_context = (struct sevenzip_context_t*)data;
if (!sevenzip_context)
return;
if (sevenzip_context->output)
{
IAlloc_Free(&sevenzip_context->allocImp, sevenzip_context->output);
sevenzip_context->output = NULL;
sevenzip_context->handle->data = NULL;
}
SzArEx_Free(&sevenzip_context->db, &sevenzip_context->allocImp);
File_Close(&sevenzip_context->archiveStream.file);
}
/* Extract the relative path (needle) from a 7z archive
* (path) and allocate a buf for it to write it in.
* If optional_outfile is set, extract to that instead
* and don't allocate buffer.
*/
static int sevenzip_file_read(
const char *path,
const char *needle, void **buf,
const char *optional_outfile)
{
CFileInStream archiveStream;
CLookToRead lookStream;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
CSzArEx db;
uint8_t *output = 0;
long outsize = -1;
/*These are the allocation routines.
* Currently using the non-standard 7zip choices. */
allocImp.Alloc = SzAlloc;
allocImp.Free = SzFree;
allocTempImp.Alloc = SzAllocTemp;
allocTempImp.Free = SzFreeTemp;
/* Could not open 7zip archive? */
if (InFile_Open(&archiveStream.file, path))
return -1;
FileInStream_CreateVTable(&archiveStream);
LookToRead_CreateVTable(&lookStream, False);
lookStream.realStream = &archiveStream.s;
LookToRead_Init(&lookStream);
CrcGenerateTable();
SzArEx_Init(&db);
if (SzArEx_Open(&db, &lookStream.s, &allocImp, &allocTempImp) == SZ_OK)
{
uint32_t i;
bool file_found = false;
uint16_t *temp = NULL;
size_t temp_size = 0;
uint32_t block_index = 0xFFFFFFFF;
SRes res = SZ_OK;
for (i = 0; i < db.db.NumFiles; i++)
{
size_t len;
char infile[PATH_MAX_LENGTH];
size_t offset = 0;
size_t outSizeProcessed = 0;
const CSzFileItem *f = db.db.Files + i;
/* We skip over everything which is not a directory.
* FIXME: Why continue then if f->IsDir is true?*/
if (f->IsDir)
continue;
len = SzArEx_GetFileNameUtf16(&db, i, NULL);
if (len > temp_size)
{
if (temp)
free(temp);
temp_size = len;
temp = (uint16_t *)malloc(temp_size * sizeof(temp[0]));
if (temp == 0)
{
res = SZ_ERROR_MEM;
break;
}
}
SzArEx_GetFileNameUtf16(&db, i, temp);
res = SZ_ERROR_FAIL;
infile[0] = '\0';
if (temp)
res = utf16_to_char_string(temp, infile, sizeof(infile))
? SZ_OK : SZ_ERROR_FAIL;
if (string_is_equal(infile, needle))
{
size_t output_size = 0;
/*RARCH_LOG_OUTPUT("Opened archive %s. Now trying to extract %s\n",
path, needle);*/
/* C LZMA SDK does not support chunked extraction - see here:
* sourceforge.net/p/sevenzip/discussion/45798/thread/6fb59aaf/
* */
file_found = true;
res = SzArEx_Extract(&db, &lookStream.s, i, &block_index,
&output, &output_size, &offset, &outSizeProcessed,
&allocImp, &allocTempImp);
if (res != SZ_OK)
break; /* This goes to the error section. */
outsize = outSizeProcessed;
if (optional_outfile != NULL)
{
const void *ptr = (const void*)(output + offset);
if (!filestream_write_file(optional_outfile, ptr, outsize))
{
/*RARCH_ERR("Could not open outfilepath %s.\n",
optional_outfile);*/
res = SZ_OK;
file_found = true;
outsize = -1;
}
}
else
{
/*We could either use the 7Zip allocated buffer,
* or create our own and use it.
* We would however need to realloc anyways, because RetroArch
* expects a \0 at the end, therefore we allocate new,
* copy and free the old one. */
*buf = malloc(outsize + 1);
((char*)(*buf))[outsize] = '\0';
memcpy(*buf,output + offset,outsize);
}
break;
}
}
if (temp)
free(temp);
IAlloc_Free(&allocImp, output);
if (!(file_found && res == SZ_OK))
{
/* Error handling
*
* Failed to open compressed file inside 7zip archive.
*/
outsize = -1;
}
}
SzArEx_Free(&db, &allocImp);
File_Close(&archiveStream.file);
return outsize;
}
static bool sevenzip_stream_decompress_data_to_file_init(
file_archive_file_handle_t *handle,
const uint8_t *cdata, uint32_t csize, uint32_t size)
{
struct sevenzip_context_t *sevenzip_context =
(struct sevenzip_context_t*)handle->stream;
if (!sevenzip_context)
return false;
sevenzip_context->handle = handle;
return true;
}
static int sevenzip_stream_decompress_data_to_file_iterate(void *data)
{
struct sevenzip_context_t *sevenzip_context =
(struct sevenzip_context_t*)data;
SRes res = SZ_ERROR_FAIL;
size_t output_size = 0;
size_t offset = 0;
size_t outSizeProcessed = 0;
res = SzArEx_Extract(&sevenzip_context->db,
&sevenzip_context->lookStream.s, sevenzip_context->index,
&sevenzip_context->block_index, &sevenzip_context->output,
&output_size, &offset, &outSizeProcessed,
&sevenzip_context->allocImp, &sevenzip_context->allocTempImp);
if (res != SZ_OK)
return 0;
if (sevenzip_context->handle)
sevenzip_context->handle->data = sevenzip_context->output + offset;
return 1;
}
static int sevenzip_parse_file_init(file_archive_transfer_t *state,
const char *file)
{
struct sevenzip_context_t *sevenzip_context =
(struct sevenzip_context_t*)sevenzip_stream_new();
if (state->archive_size < SEVENZIP_MAGIC_LEN)
goto error;
if (memcmp(state->data, SEVENZIP_MAGIC, SEVENZIP_MAGIC_LEN) != 0)
goto error;
state->stream = sevenzip_context;
/* could not open 7zip archive? */
if (InFile_Open(&sevenzip_context->archiveStream.file, file))
goto error;
FileInStream_CreateVTable(&sevenzip_context->archiveStream);
LookToRead_CreateVTable(&sevenzip_context->lookStream, False);
sevenzip_context->lookStream.realStream = &sevenzip_context->archiveStream.s;
LookToRead_Init(&sevenzip_context->lookStream);
CrcGenerateTable();
SzArEx_Init(&sevenzip_context->db);
if (SzArEx_Open(&sevenzip_context->db, &sevenzip_context->lookStream.s,
&sevenzip_context->allocImp, &sevenzip_context->allocTempImp) != SZ_OK)
goto error;
return 0;
error:
if (sevenzip_context)
sevenzip_stream_free(sevenzip_context);
return -1;
}
static int sevenzip_parse_file_iterate_step_internal(
file_archive_transfer_t *state, char *filename,
const uint8_t **cdata, unsigned *cmode,
uint32_t *size, uint32_t *csize, uint32_t *checksum,
unsigned *payback, struct archive_extract_userdata *userdata)
{
struct sevenzip_context_t *sevenzip_context = (struct sevenzip_context_t*)state->stream;
const CSzFileItem *file = sevenzip_context->db.db.Files + sevenzip_context->index;
if (sevenzip_context->index < sevenzip_context->db.db.NumFiles)
{
size_t len = SzArEx_GetFileNameUtf16(&sevenzip_context->db,
sevenzip_context->index, NULL);
uint64_t compressed_size = 0;
if (sevenzip_context->packIndex < sevenzip_context->db.db.NumPackStreams)
{
compressed_size = sevenzip_context->db.db.PackSizes[sevenzip_context->packIndex];
sevenzip_context->packIndex++;
}
if (len < PATH_MAX_LENGTH && !file->IsDir)
{
char infile[PATH_MAX_LENGTH];
SRes res = SZ_ERROR_FAIL;
uint16_t *temp = (uint16_t*)malloc(len * sizeof(uint16_t));
if (!temp)
return -1;
infile[0] = '\0';
SzArEx_GetFileNameUtf16(&sevenzip_context->db, sevenzip_context->index,
temp);
if (temp)
{
res = utf16_to_char_string(temp, infile, sizeof(infile))
? SZ_OK : SZ_ERROR_FAIL;
free(temp);
}
if (res != SZ_OK)
return -1;
strlcpy(filename, infile, PATH_MAX_LENGTH);
*cmode = ARCHIVE_MODE_COMPRESSED;
*checksum = file->Crc;
*size = file->Size;
*csize = compressed_size;
}
}
*payback = 1;
return 1;
}
static int sevenzip_parse_file_iterate_step(file_archive_transfer_t *state,
const char *valid_exts,
struct archive_extract_userdata *userdata, file_archive_file_cb file_cb)
{
char filename[PATH_MAX_LENGTH];
const uint8_t *cdata = NULL;
uint32_t checksum = 0;
uint32_t size = 0;
uint32_t csize = 0;
unsigned cmode = 0;
unsigned payload = 0;
struct sevenzip_context_t *sevenzip_context = NULL;
int ret;
filename[0] = '\0';
ret = sevenzip_parse_file_iterate_step_internal(state, filename,
&cdata, &cmode, &size, &csize,
&checksum, &payload, userdata);
if (ret != 1)
return ret;
userdata->extracted_file_path = filename;
userdata->crc = checksum;
if (file_cb && !file_cb(filename, valid_exts, cdata, cmode,
csize, size, checksum, userdata))
return 0;
sevenzip_context = (struct sevenzip_context_t*)state->stream;
sevenzip_context->index += payload;
return 1;
}
static uint32_t sevenzip_stream_crc32_calculate(uint32_t crc,
const uint8_t *data, size_t length)
{
return encoding_crc32(crc, data, length);
}
const struct file_archive_file_backend sevenzip_backend = {
sevenzip_stream_new,
sevenzip_stream_free,
sevenzip_stream_decompress_data_to_file_init,
sevenzip_stream_decompress_data_to_file_iterate,
sevenzip_stream_crc32_calculate,
sevenzip_file_read,
sevenzip_parse_file_init,
sevenzip_parse_file_iterate_step,
"7z"
};
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