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RetroArch/decompress/7zip_support.c
twinaphex a7f1e43d81 (decompress) Cleanups
2015-06-14 19:37:24 +02:00

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2014-2015 - Timo Strunk
* Copyright (C) 2011-2015 - Daniel De Matteis
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdint.h>
#include <sys/types.h>
#include <string.h>
#include <retro_miscellaneous.h>
#include <file/file_path.h>
#include <string/string_list.h>
#include "7zip_support.h"
#include "../deps/7zip/7z.h"
#include "../deps/7zip/7zAlloc.h"
#include "../deps/7zip/7zCrc.h"
#include "../deps/7zip/7zFile.h"
#include "../deps/7zip/7zVersion.h"
/* Undefined at the end of the file
* Don't use outside of this file
*/
#define RARCH_ZIP_SUPPORT_BUFFER_SIZE_MAX 16384
static ISzAlloc g_Alloc = { SzAlloc, SzFree };
static int Buf_EnsureSize(CBuf *dest, size_t size)
{
if (dest->size >= size)
return 1;
Buf_Free(dest, &g_Alloc);
return Buf_Create(dest, size, &g_Alloc);
}
#ifndef _WIN32
static uint8_t kUtf8Limits[5] = { 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
static Bool Utf16_To_Utf8(uint8_t *dest, size_t *destLen,
const uint16_t *src, size_t srcLen)
{
size_t destPos = 0;
size_t srcPos = 0;
for (;;)
{
unsigned numAdds;
uint32_t value;
if (srcPos == srcLen)
{
*destLen = destPos;
return True;
}
value = src[srcPos++];
if (value < 0x80)
{
if (dest)
dest[destPos] = (char)value;
destPos++;
continue;
}
if (value >= 0xD800 && value < 0xE000)
{
uint32_t c2;
if (value >= 0xDC00 || srcPos == srcLen)
break;
c2 = src[srcPos++];
if (c2 < 0xDC00 || c2 >= 0xE000)
break;
value = (((value - 0xD800) << 10) | (c2 - 0xDC00)) + 0x10000;
}
for (numAdds = 1; numAdds < 5; numAdds++)
if (value < (((uint32_t)1) << (numAdds * 5 + 6)))
break;
if (dest)
dest[destPos] = (char)(kUtf8Limits[numAdds - 1]
+ (value >> (6 * numAdds)));
destPos++;
do
{
numAdds--;
if (dest)
dest[destPos] = (char)(0x80
+ ((value >> (6 * numAdds)) & 0x3F));
destPos++;
}while (numAdds != 0);
}
*destLen = destPos;
return False;
}
static SRes Utf16_To_Utf8Buf(CBuf *dest,
const uint16_t *src, size_t srcLen)
{
Bool res;
size_t destLen = 0;
Utf16_To_Utf8(NULL, &destLen, src, srcLen);
destLen += 1;
if (!Buf_EnsureSize(dest, destLen))
return SZ_ERROR_MEM;
res = Utf16_To_Utf8(dest->data, &destLen, src, srcLen);
dest->data[destLen] = 0;
return res ? SZ_OK : SZ_ERROR_FAIL;
}
#endif
static SRes Utf16_To_Char(CBuf *buf, const uint16_t *s, int fileMode)
{
int len = 0;
for (len = 0; s[len] != '\0'; len++);
#ifdef _WIN32
{
int size = len * 3 + 100;
if (!Buf_EnsureSize(buf, size))
return SZ_ERROR_MEM;
{
char defaultChar = '_';
BOOL defUsed;
int numChars = WideCharToMultiByte(fileMode ?
(
#ifdef UNDER_CE
CP_ACP
#else
AreFileApisANSI() ? CP_ACP : CP_OEMCP
#endif
) : CP_OEMCP,
0, (LPCWSTR)s, len, (char *)buf->data,
size, &defaultChar, &defUsed);
if (numChars == 0 || numChars >= size)
return SZ_ERROR_FAIL;
buf->data[numChars] = 0;
return SZ_OK;
}
}
#else
(void)fileMode;
return Utf16_To_Utf8Buf(buf, s, len);
#endif
}
static SRes ConvertUtf16toCharString(const uint16_t *s, char *outstring)
{
CBuf buf;
SRes res;
Buf_Init(&buf);
res = Utf16_To_Char(&buf, s, 0);
if (res == SZ_OK)
strncpy(outstring, (const char*)buf.data, PATH_MAX_LENGTH);
Buf_Free(&buf, &g_Alloc);
return res;
}
/* Extract the relative path relative_path from a 7z archive
* archive_path and allocate a buf for it to write it in.
* If optional_outfile is set, extract to that instead and don't alloc buffer.
*/
int read_7zip_file(
const char *archive_path,
const char *relative_path, void **buf,
const char *optional_outfile)
{
CFileInStream archiveStream;
CLookToRead lookStream;
CSzArEx db;
SRes res;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
uint16_t *temp = NULL;
size_t tempSize = 0;
long outsize = -1;
bool file_found = false;
/*These are the allocation routines.
* Currently using the non-standard 7zip choices. */
allocImp.Alloc = SzAlloc;
allocImp.Free = SzFree;
allocTempImp.Alloc = SzAllocTemp;
allocTempImp.Free = SzFreeTemp;
if (InFile_Open(&archiveStream.file, archive_path))
{
RARCH_ERR("Could not open %s as 7z archive\n.",archive_path);
return -1;
}
else
{
RARCH_LOG_OUTPUT("Openend archive %s. Now trying to extract %s\n",
archive_path,relative_path);
}
FileInStream_CreateVTable(&archiveStream);
LookToRead_CreateVTable(&lookStream, False);
lookStream.realStream = &archiveStream.s;
LookToRead_Init(&lookStream);
CrcGenerateTable();
SzArEx_Init(&db);
res = SzArEx_Open(&db, &lookStream.s, &allocImp, &allocTempImp);
if (res == SZ_OK)
{
uint32_t i;
uint32_t blockIndex = 0xFFFFFFFF;
uint8_t *outBuffer = 0;
size_t outBufferSize = 0;
for (i = 0; i < db.db.NumFiles; i++)
{
size_t len;
char infile[PATH_MAX_LENGTH] = {0};
size_t offset = 0;
size_t outSizeProcessed = 0;
const CSzFileItem *f = db.db.Files + i;
if (f->IsDir)
{
/* We skip over everything which is not a directory.
* FIXME: Why continue then if f->IsDir is true?*/
continue;
}
len = SzArEx_GetFileNameUtf16(&db, i, NULL);
if (len > tempSize)
{
free(temp);
tempSize = len;
temp = (uint16_t *)malloc(tempSize * sizeof(temp[0]));
if (temp == 0)
{
res = SZ_ERROR_MEM;
break;
}
}
SzArEx_GetFileNameUtf16(&db, i, temp);
res = ConvertUtf16toCharString(temp,infile);
if (!strcmp(infile, relative_path))
{
/* 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,&blockIndex,
&outBuffer, &outBufferSize,&offset, &outSizeProcessed,
&allocImp, &allocTempImp);
if (res != SZ_OK)
{
break; /* This goes to the error section. */
}
outsize = outSizeProcessed;
if (optional_outfile != NULL)
{
FILE* outsink = fopen(optional_outfile,"wb");
if (outsink == NULL)
{
RARCH_ERR("Could not open outfilepath %s.\n",
optional_outfile);
IAlloc_Free(&allocImp, outBuffer);
SzArEx_Free(&db, &allocImp);
free(temp);
File_Close(&archiveStream.file);
return -1;
}
fwrite(outBuffer+offset,1,outsize,outsink);
fclose(outsink);
}
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,outBuffer+offset,outsize);
}
IAlloc_Free(&allocImp, outBuffer);
break;
}
}
}
SzArEx_Free(&db, &allocImp);
free(temp);
File_Close(&archiveStream.file);
if (res == SZ_OK && file_found == true)
return outsize;
/* Error handling */
if (!file_found)
RARCH_ERR("File %s not found in %s\n",relative_path,archive_path);
else if (res == SZ_ERROR_UNSUPPORTED)
RARCH_ERR("7Zip decoder doesn't support this archive\n");
else if (res == SZ_ERROR_MEM)
RARCH_ERR("7Zip decoder could not allocate memory\n");
else if (res == SZ_ERROR_CRC)
RARCH_ERR("7Zip decoder encountered a CRC error in the archive\n");
else
RARCH_ERR("\nUnspecified error in 7-ZIP archive, error number was: #%d\n", res);
return -1;
}
struct string_list *compressed_7zip_file_list_new(const char *path,
const char* ext)
{
CFileInStream archiveStream;
CLookToRead lookStream;
CSzArEx db;
SRes res;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
uint16_t *temp = NULL;
size_t tempSize = 0;
long outsize = -1;
struct string_list *ext_list = NULL;
struct string_list *list = string_list_new();
if (!list)
return NULL;
if (ext)
ext_list = string_split(ext, "|");
(void)outsize;
/* These are the allocation routines - currently using
* the non-standard 7zip choices. */
allocImp.Alloc = SzAlloc;
allocImp.Free = SzFree;
allocTempImp.Alloc = SzAllocTemp;
allocTempImp.Free = SzFreeTemp;
if (InFile_Open(&archiveStream.file, path))
{
RARCH_ERR("Could not open %s as 7z archive.\n",path);
goto error;
}
FileInStream_CreateVTable(&archiveStream);
LookToRead_CreateVTable(&lookStream, False);
lookStream.realStream = &archiveStream.s;
LookToRead_Init(&lookStream);
CrcGenerateTable();
SzArEx_Init(&db);
res = SzArEx_Open(&db, &lookStream.s, &allocImp, &allocTempImp);
if (res == SZ_OK)
{
uint32_t i;
uint32_t blockIndex = 0xFFFFFFFF;
uint8_t *outBuffer = 0;
size_t outBufferSize = 0;
(void)blockIndex;
(void)outBufferSize;
(void)outBuffer;
for (i = 0; i < db.db.NumFiles; i++)
{
union string_list_elem_attr attr;
const char *file_ext = NULL;
char infile[PATH_MAX_LENGTH] = {0};
size_t offset = 0;
size_t outSizeProcessed = 0;
size_t len = 0;
bool supported_by_core = false;
const CSzFileItem *f = db.db.Files + i;
(void)offset;
(void)outSizeProcessed;
if (f->IsDir)
{
/* we skip over everything, which is a directory. */
continue;
}
len = SzArEx_GetFileNameUtf16(&db, i, NULL);
if (len > tempSize)
{
free(temp);
tempSize = len;
temp = (uint16_t *)malloc(tempSize * sizeof(temp[0]));
if (temp == 0)
{
res = SZ_ERROR_MEM;
break;
}
}
SzArEx_GetFileNameUtf16(&db, i, temp);
res = ConvertUtf16toCharString(temp, infile);
file_ext = path_get_extension(infile);
if (string_list_find_elem_prefix(ext_list, ".", file_ext))
supported_by_core = true;
/*
* Currently we only support files without subdirs in the archives.
* Folders are not supported (differences between win and lin.
* Archives within archives should imho never be supported.
*/
if (!supported_by_core)
continue;
attr.i = RARCH_COMPRESSED_FILE_IN_ARCHIVE;
if (!string_list_append(list, infile, attr))
goto error;
}
}
SzArEx_Free(&db, &allocImp);
free(temp);
File_Close(&archiveStream.file);
if (res != SZ_OK)
{
/* Error handling */
if (res == SZ_ERROR_UNSUPPORTED)
RARCH_ERR("7Zip decoder doesn't support this archive. \n");
else if (res == SZ_ERROR_MEM)
RARCH_ERR("7Zip decoder could not allocate memory. \n");
else if (res == SZ_ERROR_CRC)
RARCH_ERR("7Zip decoder encountered a CRC error in the archive. \n");
else
RARCH_ERR(
"\nUnspecified error in 7-ZIP archive, error number was: #%d. \n",
res);
goto error;
}
string_list_free(ext_list);
return list;
error:
RARCH_ERR("Failed to open compressed_file: \"%s\"\n", path);
SzArEx_Free(&db, &allocImp);
free(temp);
File_Close(&archiveStream.file);
string_list_free(list);
string_list_free(ext_list);
return NULL;
}
#undef RARCH_ZIP_SUPPORT_BUFFER_SIZE_MAX
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