mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-25 08:59:58 +00:00
261 lines
6.4 KiB
C
261 lines
6.4 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2015 - Daniel De Matteis
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "file_ops.h"
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#include <file/file_path.h>
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#include <stdlib.h>
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#include <boolean.h>
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#include <string.h>
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#include <time.h>
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#include <errno.h>
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#include <compat/strl.h>
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#include <compat/posix_string.h>
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#include <retro_miscellaneous.h>
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#ifdef HAVE_COMPRESSION
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#include <file/file_extract.h>
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#endif
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#ifdef HAVE_7ZIP
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#include "decompress/7zip_support.h"
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#endif
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#ifdef HAVE_ZLIB
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#include "decompress/zip_support.h"
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#endif
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#ifdef __HAIKU__
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#include <kernel/image.h>
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#endif
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#if defined(_WIN32)
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#ifdef _MSC_VER
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#define setmode _setmode
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#endif
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#ifdef _XBOX
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#include <xtl.h>
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#define INVALID_FILE_ATTRIBUTES -1
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#else
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#include <io.h>
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#include <fcntl.h>
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#include <direct.h>
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#include <windows.h>
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#endif
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#else
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <unistd.h>
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#endif
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/**
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* write_file:
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* @path : path to file.
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* @data : contents to write to the file.
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* @size : size of the contents.
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*
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* Writes data to a file.
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*
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* Returns: true (1) on success, false (0) otherwise.
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*/
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bool write_file(const char *path, const void *data, ssize_t size)
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{
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bool ret = false;
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FILE *file = fopen(path, "wb");
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if (!file)
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return false;
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ret = fwrite(data, 1, size, file) == size;
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fclose(file);
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return ret;
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}
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/**
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* read_generic_file:
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* @path : path to file.
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* @buf : buffer to allocate and read the contents of the
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* file into. Needs to be freed manually.
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*
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* Read the contents of a file into @buf.
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*
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* Returns: number of items read, -1 on error.
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*/
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static int read_generic_file(const char *path, void **buf, ssize_t *len)
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{
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long ret = 0;
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ssize_t content_buf_size = 0;
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void *content_buf = NULL;
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FILE *file = fopen(path, "rb");
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if (!file)
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goto error;
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if (fseek(file, 0, SEEK_END) != 0)
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goto error;
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content_buf_size = ftell(file);
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if (content_buf_size < 0)
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goto error;
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rewind(file);
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content_buf = malloc(content_buf_size + 1);
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if (!content_buf)
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goto error;
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if ((ret = fread(content_buf, 1, content_buf_size, file)) < content_buf_size)
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RARCH_WARN("Didn't read whole file.\n");
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*buf = content_buf;
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/* Allow for easy reading of strings to be safe.
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* Will only work with sane character formatting (Unix). */
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((char*)content_buf)[content_buf_size] = '\0';
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if (fclose(file) != 0)
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RARCH_WARN("Failed to close file stream.\n");
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if (len)
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*len = ret;
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return 1;
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error:
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if (file)
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fclose(file);
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if (content_buf)
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free(content_buf);
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if (len)
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*len = -1;
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*buf = NULL;
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return 0;
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}
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#ifdef HAVE_COMPRESSION
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/* Generic compressed file loader.
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* Extracts to buf, unless optional_filename != 0
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* Then extracts to optional_filename and leaves buf alone.
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*/
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int read_compressed_file(const char * path, void **buf,
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const char* optional_filename, ssize_t *length)
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{
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const char* file_ext;
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char archive_path[PATH_MAX_LENGTH], *archive_found = NULL;
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if (optional_filename)
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{
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/* Safety check.
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* If optional_filename and optional_filename
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* exists, we simply return 0,
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* hoping that optional_filename is the
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* same as requested.
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*/
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if(path_file_exists(optional_filename))
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{
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*length = 0;
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return 1;
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}
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}
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/* We split carchive path and relative path: */
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strlcpy(archive_path, path, sizeof(archive_path));
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archive_found = (char*)strchr(archive_path,'#');
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rarch_assert(archive_found != NULL);
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/* We assure that there is something after the '#' symbol. */
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if (strlen(archive_found) <= 1)
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{
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/*
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* This error condition happens for example, when
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* path = /path/to/file.7z, or
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* path = /path/to/file.7z#
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*/
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RARCH_ERR("Could not extract image path and carchive path from "
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"path: %s.\n", path);
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*length = 0;
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return 0;
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}
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/* We split the string in two, by putting a \0, where the hash was: */
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*archive_found = '\0';
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archive_found += 1;
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file_ext = path_get_extension(archive_path);
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#ifdef HAVE_7ZIP
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if (strcasecmp(file_ext,"7z") == 0)
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{
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*length = read_7zip_file(archive_path,archive_found,buf,optional_filename);
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if (*length != -1)
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return 1;
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}
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#endif
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#ifdef HAVE_ZLIB
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if (strcasecmp(file_ext,"zip") == 0)
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{
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*length = read_zip_file(archive_path,archive_found,buf,optional_filename);
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if (*length != -1)
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return 1;
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}
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#endif
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return 0;
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}
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#endif
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/**
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* read_file:
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* @path : path to file.
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* @buf : buffer to allocate and read the contents of the
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* file into. Needs to be freed manually.
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* @length : Number of items read, -1 on error.
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*
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* Read the contents of a file into @buf. Will call read_compressed_file
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* if path contains a compressed file, otherwise will call read_generic_file.
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*
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* Returns: 1 if file read, 0 on error.
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*/
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int read_file(const char *path, void **buf, ssize_t *length)
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{
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#ifdef HAVE_COMPRESSION
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if (path_contains_compressed_file(path))
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{
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if (read_compressed_file(path, buf, NULL, length))
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return 1;
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}
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#endif
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return read_generic_file(path, buf, length);
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}
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struct string_list *compressed_file_list_new(const char *path,
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const char* ext)
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{
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#ifdef HAVE_COMPRESSION
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const char* file_ext = path_get_extension(path);
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#ifdef HAVE_7ZIP
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if (strcasecmp(file_ext,"7z") == 0)
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return compressed_7zip_file_list_new(path,ext);
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#endif
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#ifdef HAVE_ZLIB
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if (strcasecmp(file_ext,"zip") == 0)
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return zlib_get_file_list(path, ext);
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#endif
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#endif
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return NULL;
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}
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