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 struct string_list *compressed_7zip_file_list_new(
const char *path, const char* ext)
{
CFileInStream archiveStream;
CLookToRead lookStream;
CSzArEx db;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
size_t temp_size = 0;
struct string_list *list = NULL;
/* 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);
return NULL;
}
list = string_list_new();
if (!list)
{
File_Close(&archiveStream.file);
return NULL;
}
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;
struct string_list *ext_list = ext ? string_split(ext, "|"): NULL;
SRes res = SZ_OK;
uint16_t *temp = NULL;
for (i = 0; i < db.db.NumFiles; i++)
{
union string_list_elem_attr attr;
char infile[PATH_MAX_LENGTH];
const char *file_ext = NULL;
size_t len = 0;
bool supported_by_core = false;
const CSzFileItem *f = db.db.Files + i;
/* we skip over everything, which is a directory. */
if (f->IsDir)
continue;
len = SzArEx_GetFileNameUtf16(&db, i, NULL);
if (len > temp_size)
{
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 = utf16_to_char_string(temp, infile, sizeof(infile))
? SZ_OK : SZ_ERROR_FAIL;
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))
{
res = SZ_ERROR_MEM;
break;
}
}
string_list_free(ext_list);
free(temp);
if (res != SZ_OK)
{
/* Error handling */
RARCH_ERR("Failed to open compressed_file: \"%s\"\n", path);
string_list_free(list);
list = NULL;
}
}
SzArEx_Free(&db, &allocImp);
File_Close(&archiveStream.file);
return list;
}
/* 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 content_7zip_file_read(
const char *path,
const char *needle, void **buf,
const char *optional_outfile)
{
CFileInStream archiveStream;
CLookToRead lookStream;
CSzArEx db;
ISzAlloc allocImp;
ISzAlloc allocTempImp;
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;
if (InFile_Open(&archiveStream.file, path))
{
RARCH_ERR("Could not open %s as 7z archive\n.", 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)
{
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 = 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 (!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;
}
}
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;
}
}
free(temp);
IAlloc_Free(&allocImp, output);
if (!(file_found && res == SZ_OK))
{
/* Error handling */
if (!file_found)
RARCH_ERR("File %s not found in %s\n", needle, path);
RARCH_ERR("Failed to open compressed file inside 7zip archive.\n");
outsize = -1;
}
}
SzArEx_Free(&db, &allocImp);
File_Close(&archiveStream.file);
return outsize;
}