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RetroArch/file_ops.c
twinaphex ff779eabd4 (file_ops.c) Cleanups
2015-09-19 12:48:53 +02:00

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2015 - Daniel De Matteis
* Copyright (C) 2014-2015 - Timo Strunk
*
* 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 <stdlib.h>
#include <sys/types.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <boolean.h>
#include <compat/strl.h>
#include <compat/posix_string.h>
#include <retro_assert.h>
#include <retro_miscellaneous.h>
#include <file/file_path.h>
#include <retro_file.h>
#include <string/string_list.h>
#ifdef HAVE_COMPRESSION
#include <file/file_extract.h>
#endif
#include "file_ops.h"
#ifdef HAVE_COMPRESSION
#ifdef HAVE_7ZIP
#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"
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.
*/
static 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;
uint8_t *outBuffer = 0;
size_t outBufferSize = 0;
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;
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;
/* 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 > 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)
{
const void *ptr = (const void*)(outBuffer + offset);
if (!retro_write_file(optional_outfile, ptr, outsize))
{
RARCH_ERR("Could not open outfilepath %s.\n",
optional_outfile);
res = SZ_OK;
file_found = true;
outsize = -1;
break;
}
}
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);
}
break;
}
}
}
IAlloc_Free(&allocImp, outBuffer);
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;
}
static 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;
/* we skip over everything, which is a directory. */
if (f->IsDir)
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;
}
#endif
#ifdef HAVE_ZLIB
#include "deps/zlib/unzip.h"
#define RARCH_ZIP_SUPPORT_BUFFER_SIZE_MAX 16384
/* Extract the relative path relative_path from a
* zip archive archive_path and allocate a buf for it to write it in. */
/* This code is inspired by:
* stackoverflow.com/questions/10440113/simple-way-to-unzip-a-zip-file-using-zlib
*
* optional_outfile if not NULL will be used to extract the file. buf will be 0
* then.
*/
static int read_zip_file(const char *archive_path,
const char *relative_path, void **buf,
const char* optional_outfile)
{
uLong i;
unz_global_info global_info;
ssize_t bytes_read = -1;
bool finished_reading = false;
unzFile *zipfile = (unzFile*)unzOpen(archive_path);
if (!zipfile)
return -1;
/* Get info about the zip file */
if (unzGetGlobalInfo(zipfile, &global_info) != UNZ_OK)
goto error;
for ( i = 0; i < global_info.number_entry; ++i )
{
/* Get info about current file. */
unz_file_info file_info;
char filename[PATH_MAX_LENGTH] = {0};
char last_char = ' ';
if (unzGetCurrentFileInfo(
zipfile,
&file_info,
filename,
PATH_MAX_LENGTH,
NULL, 0, NULL, 0 ) != UNZ_OK )
goto error;
/* Check if this entry is a directory or file. */
last_char = filename[strlen(filename)-1];
/* We skip directories */
if ( last_char == '/' || last_char == '\\' ) { }
else if (!strcmp(filename, relative_path))
{
/* We found the correct file in the zip,
* now extract it to *buf. */
if (unzOpenCurrentFile(zipfile) != UNZ_OK )
goto error;
if (optional_outfile == 0)
{
/* Allocate outbuffer */
*buf = malloc(file_info.uncompressed_size + 1 );
bytes_read = unzReadCurrentFile(zipfile, *buf, file_info.uncompressed_size);
if (bytes_read != (ssize_t)file_info.uncompressed_size)
{
RARCH_ERR(
"Tried to read %d bytes, but only got %d of file %s in ZIP %s.\n",
(unsigned int) file_info.uncompressed_size, (int)bytes_read,
relative_path, archive_path);
free(*buf);
goto close;
}
((char*)(*buf))[file_info.uncompressed_size] = '\0';
}
else
{
char read_buffer[RARCH_ZIP_SUPPORT_BUFFER_SIZE_MAX] = {0};
RFILE* outsink = retro_fopen(optional_outfile, RFILE_MODE_WRITE, -1);
if (!outsink)
goto close;
bytes_read = 0;
do
{
bytes_read = unzReadCurrentFile(zipfile, read_buffer,
RARCH_ZIP_SUPPORT_BUFFER_SIZE_MAX );
if (retro_fwrite(outsink, read_buffer, bytes_read) == bytes_read)
continue;
RARCH_ERR("Error writing to %s.\n", optional_outfile);
retro_fclose(outsink);
goto close;
} while(bytes_read > 0);
retro_fclose(outsink);
}
finished_reading = true;
}
unzCloseCurrentFile(zipfile);
if (finished_reading)
break;
if ((i + 1) < global_info.number_entry)
{
if (unzGoToNextFile(zipfile) == UNZ_OK)
continue;
goto error;
}
}
unzClose(zipfile);
if(!finished_reading)
return -1;
return bytes_read;
close:
unzCloseCurrentFile(zipfile);
error:
unzClose(zipfile);
return -1;
}
#endif
#endif
#ifdef HAVE_COMPRESSION
/* Generic compressed file loader.
* Extracts to buf, unless optional_filename != 0
* Then extracts to optional_filename and leaves buf alone.
*/
int read_compressed_file(const char * path, void **buf,
const char* optional_filename, ssize_t *length)
{
const char* file_ext = NULL;
char *archive_found = NULL;
char archive_path[PATH_MAX_LENGTH] = {0};
if (optional_filename)
{
/* Safety check. * If optional_filename and optional_filename
* exists, we simply return 0,
* hoping that optional_filename is the
* same as requested.
*/
if(path_file_exists(optional_filename))
{
*length = 0;
return 1;
}
}
/* We split carchive path and relative path: */
strlcpy(archive_path, path, sizeof(archive_path));
archive_found = (char*)strchr(archive_path,'#');
rarch_assert(archive_found != NULL);
/* We assure that there is something after the '#' symbol. */
if (strlen(archive_found) <= 1)
{
/*
* This error condition happens for example, when
* path = /path/to/file.7z, or
* path = /path/to/file.7z#
*/
RARCH_ERR("Could not extract image path and carchive path from "
"path: %s.\n", path);
*length = 0;
return 0;
}
/* We split the string in two, by putting a \0, where the hash was: */
*archive_found = '\0';
archive_found += 1;
file_ext = path_get_extension(archive_path);
#ifdef HAVE_7ZIP
if (strcasecmp(file_ext,"7z") == 0)
{
*length = read_7zip_file(archive_path,archive_found,buf,optional_filename);
if (*length != -1)
return 1;
}
#endif
#ifdef HAVE_ZLIB
if (strcasecmp(file_ext,"zip") == 0)
{
*length = read_zip_file(archive_path,archive_found,buf,optional_filename);
if (*length != -1)
return 1;
}
#endif
return 0;
}
#endif
/**
* read_file:
* @path : path to file.
* @buf : buffer to allocate and read the contents of the
* file into. Needs to be freed manually.
* @length : Number of items read, -1 on error.
*
* Read the contents of a file into @buf. Will call read_compressed_file
* if path contains a compressed file, otherwise will call retro_read_file().
*
* Returns: 1 if file read, 0 on error.
*/
int read_file(const char *path, void **buf, ssize_t *length)
{
#ifdef HAVE_COMPRESSION
if (path_contains_compressed_file(path))
{
if (read_compressed_file(path, buf, NULL, length))
return 1;
}
#endif
return retro_read_file(path, buf, length);
}
struct string_list *compressed_file_list_new(const char *path,
const char* ext)
{
#ifdef HAVE_COMPRESSION
const char* file_ext = path_get_extension(path);
#ifdef HAVE_7ZIP
if (strcasecmp(file_ext,"7z") == 0)
return compressed_7zip_file_list_new(path,ext);
#endif
#ifdef HAVE_ZLIB
if (strcasecmp(file_ext,"zip") == 0)
return zlib_get_file_list(path, ext);
#endif
#endif
return NULL;
}
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