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RetroArch/libretro-common/file/file_path.c

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/* Copyright (C) 2010-2015 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (file_path.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 <boolean.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#if defined(_WIN32)
#ifdef _MSC_VER
#define setmode _setmode
#endif
#ifdef _XBOX
#include <xtl.h>
#define INVALID_FILE_ATTRIBUTES -1
#else
#include <io.h>
#include <fcntl.h>
#include <direct.h>
#include <windows.h>
#endif
#elif defined(VITA)
#include <psp2/io/fcntl.h>
#include <psp2/io/dirent.h>
#include <sys/stat.h>
#else
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#endif
#if defined(PSP)
#include <pspkernel.h>
#endif
#ifdef __HAIKU__
#include <kernel/image.h>
#endif
#if (defined(__CELLOS_LV2__) && !defined(__PSL1GHT__)) || defined(__QNX__) || defined(PSP)
#include <unistd.h> /* stat() is defined here */
#endif
#include <file/file_path.h>
#include <compat/strl.h>
#include <compat/posix_string.h>
#include <retro_assert.h>
#include <retro_miscellaneous.h>
#if defined(__CELLOS_LV2__)
#ifndef S_ISDIR
#define S_ISDIR(x) (x & 0040000)
#endif
#endif
/**
* path_get_extension:
* @path : path
*
* Gets extension of file. Only '.'s
* after the last slash are considered.
*
* Returns: extension part from the path.
*/
const char *path_get_extension(const char *path)
{
const char *ext = strrchr(path_basename(path), '.');
if (!ext)
return "";
return ext + 1;
}
/**
* path_remove_extension:
* @path : path
*
* Removes the extension from the path and returns the result.
* Removes all text after and including the last '.'.
* Only '.'s after the last slash are considered.
*
* Returns: path with the extension part removed.
*/
char *path_remove_extension(char *path)
{
char *last = (char*)strrchr(path_basename(path), '.');
if (!last)
return NULL;
if (*last)
*last = '\0';
return last;
}
/**
* path_contains_compressed_file:
* @path : path
*
* Checks if path contains a compressed file.
*
* Currently we only check for hash symbol (#) inside the pathname.
* If path is ever expanded to a general URI, we should check for that here.
*
* Example: Somewhere in the path there might be a compressed file
* E.g.: /path/to/file.7z#mygame.img
*
* Returns: true (1) if path contains compressed file, otherwise false (0).
**/
bool path_contains_compressed_file(const char *path)
{
return (strchr(path,'#') != NULL);
}
/**
* path_is_compressed_file:
* @path : path
*
* Checks if path is a compressed file.
*
* Returns: true (1) if path is a compressed file, otherwise false (0).
**/
bool path_is_compressed_file(const char* path)
{
#ifdef HAVE_COMPRESSION
const char* file_ext = path_get_extension(path);
#ifdef HAVE_ZLIB
if (!strcmp(file_ext, "zip"))
return true;
#endif
#ifdef HAVE_7ZIP
if (!strcmp(file_ext, "7z"))
return true;
#endif
#endif
return false;
}
/**
* path_is_directory:
* @path : path
*
* Checks if path is a directory.
*
* Returns: true (1) if path is a directory, otherwise false (0).
*/
bool path_is_directory(const char *path)
{
#ifdef _WIN32
DWORD ret = GetFileAttributes(path);
return (ret & FILE_ATTRIBUTE_DIRECTORY) && (ret != INVALID_FILE_ATTRIBUTES);
#else
struct stat buf;
if (stat(path, &buf) < 0)
return false;
return S_ISDIR(buf.st_mode);
#endif
}
/**
* path_file_exists:
* @path : path
*
* Checks if a file already exists at the specified path (@path).
*
* Returns: true (1) if file already exists, otherwise false (0).
*/
bool path_file_exists(const char *path)
{
FILE *dummy = fopen(path, "rb");
if (!dummy)
return false;
fclose(dummy);
return true;
}
/**
* fill_pathname:
* @out_path : output path
* @in_path : input path
* @replace : what to replace
* @size : buffer size of output path
*
* FIXME: Verify
*
* Replaces filename extension with 'replace' and outputs result to out_path.
* The extension here is considered to be the string from the last '.'
* to the end.
*
* Only '.'s after the last slash are considered as extensions.
* If no '.' is present, in_path and replace will simply be concatenated.
* 'size' is buffer size of 'out_path'.
* E.g.: in_path = "/foo/bar/baz/boo.c", replace = ".asm" =>
* out_path = "/foo/bar/baz/boo.asm"
* E.g.: in_path = "/foo/bar/baz/boo.c", replace = "" =>
* out_path = "/foo/bar/baz/boo"
*/
void fill_pathname(char *out_path, const char *in_path,
const char *replace, size_t size)
{
char tmp_path[PATH_MAX_LENGTH] = {0};
char *tok = NULL;
rarch_assert(strlcpy(tmp_path, in_path,
sizeof(tmp_path)) < sizeof(tmp_path));
if ((tok = (char*)strrchr(path_basename(tmp_path), '.')))
*tok = '\0';
rarch_assert(strlcpy(out_path, tmp_path, size) < size);
rarch_assert(strlcat(out_path, replace, size) < size);
}
/**
* fill_pathname_noext:
* @out_path : output path
* @in_path : input path
* @replace : what to replace
* @size : buffer size of output path
*
* Appends a filename extension 'replace' to 'in_path', and outputs
* result in 'out_path'.
*
* Assumes in_path has no extension. If an extension is still
* present in 'in_path', it will be ignored.
*
*/
void fill_pathname_noext(char *out_path, const char *in_path,
const char *replace, size_t size)
{
rarch_assert(strlcpy(out_path, in_path, size) < size);
rarch_assert(strlcat(out_path, replace, size) < size);
}
static char *find_last_slash(const char *str)
{
const char *slash = strrchr(str, '/');
#ifdef _WIN32
const char *backslash = strrchr(str, '\\');
if (backslash && ((slash && backslash > slash) || !slash))
slash = backslash;
#endif
return (char*)slash;
}
/**
* fill_pathname_slash:
* @path : path
* @size : size of path
*
* Assumes path is a directory. Appends a slash
* if not already there.
**/
void fill_pathname_slash(char *path, size_t size)
{
size_t path_len = strlen(path);
const char *last_slash = find_last_slash(path);
/* Try to preserve slash type. */
if (last_slash && (last_slash != (path + path_len - 1)))
{
char join_str[2];
strlcpy(join_str, last_slash, sizeof(join_str));
rarch_assert(strlcat(path, join_str, size) < size);
}
else if (!last_slash)
rarch_assert(strlcat(path, path_default_slash(), size) < size);
}
/**
* fill_pathname_dir:
* @in_dir : input directory path
* @in_basename : input basename to be appended to @in_dir
* @replace : replacement to be appended to @in_basename
* @size : size of buffer
*
* Appends basename of 'in_basename', to 'in_dir', along with 'replace'.
* Basename of in_basename is the string after the last '/' or '\\',
* i.e the filename without directories.
*
* If in_basename has no '/' or '\\', the whole 'in_basename' will be used.
* 'size' is buffer size of 'in_dir'.
*
* E.g..: in_dir = "/tmp/some_dir", in_basename = "/some_content/foo.c",
* replace = ".asm" => in_dir = "/tmp/some_dir/foo.c.asm"
**/
void fill_pathname_dir(char *in_dir, const char *in_basename,
const char *replace, size_t size)
{
const char *base = NULL;
fill_pathname_slash(in_dir, size);
base = path_basename(in_basename);
rarch_assert(strlcat(in_dir, base, size) < size);
rarch_assert(strlcat(in_dir, replace, size) < size);
}
/**
* fill_pathname_base:
* @out : output path
* @in_path : input path
* @size : size of output path
*
* Copies basename of @in_path into @out_path.
**/
void fill_pathname_base(char *out, const char *in_path, size_t size)
{
const char *ptr_bak = NULL;
const char *ptr = find_last_slash(in_path);
(void)ptr_bak;
if (ptr)
ptr++;
else
ptr = in_path;
#ifdef HAVE_COMPRESSION
/* In case of compression, we also have to consider paths like
* /path/to/archive.7z#mygame.img
* and
* /path/to/archive.7z#folder/mygame.img
* basename would be mygame.img in both cases
*/
ptr_bak = ptr;
ptr = strchr(ptr_bak,'#');
if (ptr)
ptr++;
else
ptr = ptr_bak;
#endif
rarch_assert(strlcpy(out, ptr, size) < size);
}
/**
* fill_pathname_basedir:
* @out_dir : output directory
* @in_path : input path
* @size : size of output directory
*
* Copies base directory of @in_path into @out_path.
* If in_path is a path without any slashes (relative current directory),
* @out_path will get path "./".
**/
void fill_pathname_basedir(char *out_dir,
const char *in_path, size_t size)
{
rarch_assert(strlcpy(out_dir, in_path, size) < size);
path_basedir(out_dir);
}
/**
* fill_pathname_parent_dir:
* @out_dir : output directory
* @in_dir : input directory
* @size : size of output directory
*
* Copies parent directory of @in_dir into @out_dir.
* Assumes @in_dir is a directory. Keeps trailing '/'.
**/
void fill_pathname_parent_dir(char *out_dir,
const char *in_dir, size_t size)
{
rarch_assert(strlcpy(out_dir, in_dir, size) < size);
path_parent_dir(out_dir);
}
/**
* fill_dated_filename:
* @out_filename : output filename
* @ext : extension of output filename
* @size : buffer size of output filename
*
* Creates a 'dated' filename prefixed by 'RetroArch', and
* concatenates extension (@ext) to it.
*
* E.g.:
* out_filename = "RetroArch-{month}{day}-{Hours}{Minutes}.{@ext}"
**/
void fill_dated_filename(char *out_filename,
const char *ext, size_t size)
{
time_t cur_time;
time(&cur_time);
strftime(out_filename, size,
"RetroArch-%m%d-%H%M%S.", localtime(&cur_time));
strlcat(out_filename, ext, size);
}
/**
* path_basedir:
* @path : path
*
* Extracts base directory by mutating path.
* Keeps trailing '/'.
**/
void path_basedir(char *path)
{
char *last = NULL;
if (strlen(path) < 2)
return;
#ifdef HAVE_COMPRESSION
/* We want to find the directory with the zipfile in basedir. */
last = strchr(path,'#');
if (last)
*last = '\0';
#endif
last = find_last_slash(path);
if (last)
last[1] = '\0';
else
snprintf(path, 3, ".%s", path_default_slash());
}
/**
* path_parent_dir:
* @path : path
*
* Extracts parent directory by mutating path.
* Assumes that path is a directory. Keeps trailing '/'.
**/
void path_parent_dir(char *path)
{
size_t len = strlen(path);
if (len && path_char_is_slash(path[len - 1]))
path[len - 1] = '\0';
path_basedir(path);
}
/**
* path_basename:
* @path : path
*
* Get basename from @path.
*
* Returns: basename from path.
**/
const char *path_basename(const char *path)
{
const char *last_hash = NULL;
const char *last = find_last_slash(path);
(void)last_hash;
#ifdef HAVE_COMPRESSION
/* We cut either at the last hash or the last slash; whichever comes last */
last_hash = strchr(path,'#');
if (last_hash > last)
return last_hash + 1;
#endif
if (last)
return last + 1;
return path;
}
/**
* path_is_absolute:
* @path : path
*
* Checks if @path is an absolute path or a relative path.
*
* Returns: true (1) if path is absolute, false (1) if path is relative.
**/
bool path_is_absolute(const char *path)
{
if (path[0] == '/')
return true;
#ifdef _WIN32
/* Many roads lead to Rome ... */
if ((strstr(path, "\\\\") == path)
|| strstr(path, ":/") || strstr(path, ":\\") || strstr(path, ":\\\\"))
return true;
#endif
return false;
}
/**
* path_resolve_realpath:
* @buf : buffer for path
* @size : size of buffer
*
* Turns relative paths into absolute path.
* If relative, rebases on current working dir.
**/
void path_resolve_realpath(char *buf, size_t size)
{
#ifndef RARCH_CONSOLE
char tmp[PATH_MAX_LENGTH];
strlcpy(tmp, buf, sizeof(tmp));
#ifdef _WIN32
if (!_fullpath(buf, tmp, size))
strlcpy(buf, tmp, size);
#else
rarch_assert(size >= PATH_MAX_LENGTH);
/* NOTE: realpath() expects at least PATH_MAX_LENGTH bytes in buf.
* Technically, PATH_MAX_LENGTH needn't be defined, but we rely on it anyways.
* POSIX 2008 can automatically allocate for you,
* but don't rely on that. */
if (!realpath(tmp, buf))
strlcpy(buf, tmp, size);
#endif
#endif
}
/**
* path_mkdir_norecurse:
* @dir : directory
*
* Create directory on filesystem.
*
* Returns: true (1) if directory could be created, otherwise false (0).
**/
static bool path_mkdir_norecurse(const char *dir)
{
int ret;
#if defined(_WIN32)
ret = _mkdir(dir);
#elif defined(IOS)
ret = mkdir(dir, 0755);
#elif defined(VITA) || defined(PSP)
ret = sceIoMkdir(dir, 0755);
#else
ret = mkdir(dir, 0750);
#endif
/* Don't treat this as an error. */
if (ret < 0 && errno == EEXIST && path_is_directory(dir))
ret = 0;
if (ret < 0)
printf("mkdir(%s) error: %s.\n", dir, strerror(errno));
return ret == 0;
}
/**
* path_mkdir:
* @dir : directory
*
* Create directory on filesystem.
*
* Returns: true (1) if directory could be created, otherwise false (0).
**/
bool path_mkdir(const char *dir)
{
const char *target = NULL;
/* Use heap. Real chance of stack overflow if we recurse too hard. */
char *basedir = strdup(dir);
bool ret = false;
if (!basedir)
return false;
path_parent_dir(basedir);
if (!*basedir || !strcmp(basedir, dir))
goto end;
if (path_is_directory(basedir))
{
target = dir;
ret = path_mkdir_norecurse(dir);
}
else
{
target = basedir;
ret = path_mkdir(basedir);
if (ret)
{
target = dir;
ret = path_mkdir_norecurse(dir);
}
}
end:
if (target && !ret)
printf("Failed to create directory: \"%s\".\n", target);
free(basedir);
return ret;
}
/**
* fill_pathname_resolve_relative:
* @out_path : output path
* @in_refpath : input reference path
* @in_path : input path
* @size : size of @out_path
*
* Joins basedir of @in_refpath together with @in_path.
* If @in_path is an absolute path, out_path = in_path.
* E.g.: in_refpath = "/foo/bar/baz.a", in_path = "foobar.cg",
* out_path = "/foo/bar/foobar.cg".
**/
void fill_pathname_resolve_relative(char *out_path,
const char *in_refpath, const char *in_path, size_t size)
{
if (path_is_absolute(in_path))
{
rarch_assert(strlcpy(out_path, in_path, size) < size);
return;
}
rarch_assert(strlcpy(out_path, in_refpath, size) < size);
path_basedir(out_path);
rarch_assert(strlcat(out_path, in_path, size) < size);
}
/**
* fill_pathname_join:
* @out_path : output path
* @dir : directory
* @path : path
* @size : size of output path
*
* Joins a directory (@dir) and path (@path) together.
* Makes sure not to get two consecutive slashes
* between directory and path.
**/
void fill_pathname_join(char *out_path,
const char *dir, const char *path, size_t size)
{
rarch_assert(strlcpy(out_path, dir, size) < size);
if (*out_path)
fill_pathname_slash(out_path, size);
rarch_assert(strlcat(out_path, path, size) < size);
}
/**
* fill_pathname_join_delim:
* @out_path : output path
* @dir : directory
* @path : path
* @delim : delimiter
* @size : size of output path
*
* Joins a directory (@dir) and path (@path) together
* using the given delimiter (@delim).
**/
void fill_pathname_join_delim(char *out_path, const char *dir,
const char *path, const char delim, size_t size)
{
size_t copied = strlcpy(out_path, dir, size);
rarch_assert(copied < size+1);
out_path[copied] = delim;
out_path[copied+1] = '\0';
rarch_assert(strlcat(out_path, path, size) < size);
}
/**
* fill_short_pathname_representation:
* @out_rep : output representation
* @in_path : input path
* @size : size of output representation
*
* Generates a short representation of path. It should only
* be used for displaying the result; the output representation is not
* binding in any meaningful way (for a normal path, this is the same as basename)
* In case of more complex URLs, this should cut everything except for
* the main image file.
*
* E.g.: "/path/to/game.img" -> game.img
* "/path/to/myarchive.7z#folder/to/game.img" -> game.img
*/
void fill_short_pathname_representation(char* out_rep,
const char *in_path, size_t size)
{
char path_short[PATH_MAX_LENGTH] = {0};
char *last_hash = NULL;
fill_pathname(path_short, path_basename(in_path), "",
sizeof(path_short));
last_hash = (char*)strchr(path_short,'#');
if(last_hash != NULL)
{
/* We handle paths like:
* /path/to/file.7z#mygame.img
* short_name: mygame.img:
*
* We check whether something is actually
* after the hash to avoid going over the buffer.
*/
rarch_assert(strlen(last_hash) > 1);
strlcpy(out_rep, last_hash + 1, size);
}
else
strlcpy(out_rep, path_short, size);
}
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