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RetroArch/libretro-common/file/file_path.c
libretroadmin 207dfe170c Small cleanups
2023-05-03 21:10:21 +02:00

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/* Copyright (C) 2010-2020 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <locale.h>
#include <sys/stat.h>
#include <boolean.h>
#include <file/file_path.h>
#include <retro_miscellaneous.h>
#include <string/stdstring.h>
#include <time/rtime.h>
/* TODO: There are probably some unnecessary things on this huge include list now but I'm too afraid to touch it */
#ifdef __APPLE__
#include <CoreFoundation/CoreFoundation.h>
#endif
#ifdef __HAIKU__
#include <kernel/image.h>
#endif
#ifndef __MACH__
#include <compat/strl.h>
#include <compat/posix_string.h>
#endif
#include <retro_miscellaneous.h>
#include <encodings/utf.h>
#ifdef _WIN32
#include <direct.h>
#else
#include <unistd.h> /* stat() is defined here */
#endif
#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
#ifdef __WINRT__
#include <uwp/uwp_func.h>
#endif
#endif
/* Assume W-functions do not work below Win2K and Xbox platforms */
#if defined(_WIN32_WINNT) && _WIN32_WINNT < 0x0500 || defined(_XBOX)
#ifndef LEGACY_WIN32
#define LEGACY_WIN32
#endif
#endif
/* Time format strings with AM-PM designation require special
* handling due to platform dependence */
void strftime_am_pm(char *s, size_t len, const char* format,
const void *ptr)
{
char *local = NULL;
const struct tm *timeptr = (const struct tm*)ptr;
/* Ensure correct locale is set
* > Required for localised AM/PM strings */
setlocale(LC_TIME, "");
strftime(s, len, format, timeptr);
#if !(defined(__linux__) && !defined(ANDROID))
if ((local = local_to_utf8_string_alloc(s)))
{
if (!string_is_empty(local))
strlcpy(s, local, len);
free(local);
local = NULL;
}
#endif
}
/**
* Create a new linked list with one node in it
* The path on this node will be set to NULL
**/
struct path_linked_list* path_linked_list_new(void)
{
struct path_linked_list* paths_list = (struct path_linked_list*)malloc(sizeof(*paths_list));
paths_list->next = NULL;
paths_list->path = NULL;
return paths_list;
}
/**
* path_linked_list_free:
*
* Free the entire linked list
**/
void path_linked_list_free(struct path_linked_list *in_path_linked_list)
{
struct path_linked_list *node_tmp = (struct path_linked_list*)in_path_linked_list;
while (node_tmp)
{
struct path_linked_list *hold = NULL;
if (node_tmp->path)
free(node_tmp->path);
hold = (struct path_linked_list*)node_tmp;
node_tmp = node_tmp->next;
if (hold)
free(hold);
}
}
/**
* path_linked_list_add_path:
*
* Add a node to the linked list with this path
* If the first node's path if it's not yet set the path
* on this node instead
**/
void path_linked_list_add_path(struct path_linked_list *in_path_linked_list,
char *path)
{
/* If the first item does not have a path this is
a list which has just been created, so we just fill
the path for the first item
*/
if (!in_path_linked_list->path)
in_path_linked_list->path = strdup(path);
else
{
struct path_linked_list *node = (struct path_linked_list*) malloc(sizeof(*node));
if (node)
{
struct path_linked_list *head = in_path_linked_list;
node->next = NULL;
node->path = strdup(path);
if (head)
{
while (head->next)
head = head->next;
head->next = node;
}
else
in_path_linked_list = node;
}
}
}
/**
* path_get_archive_delim:
* @path : path
*
* Find delimiter of an archive file. Only the first '#'
* after a compression extension is considered.
*
* @return pointer to the delimiter in the path if it contains
* a path inside a compressed file, otherwise NULL.
**/
const char *path_get_archive_delim(const char *path)
{
char buf[5];
/* Find delimiter position
* > Since filenames may contain '#' characters,
* must loop until we find the first '#' that
* is directly *after* a compression extension */
const char *delim = strchr(path, '#');
while (delim)
{
/* Check whether this is a known archive type
* > Note: The code duplication here is
* deliberate, to maximise performance */
if (delim - path > 4)
{
strlcpy(buf, delim - 4, sizeof(buf));
buf[4] = '\0';
string_to_lower(buf);
/* Check if this is a '.zip', '.apk' or '.7z' file */
if (string_is_equal(buf, ".zip") ||
string_is_equal(buf, ".apk") ||
string_is_equal(buf + 1, ".7z"))
return delim;
}
else if (delim - path > 3)
{
strlcpy(buf, delim - 3, sizeof(buf));
buf[3] = '\0';
string_to_lower(buf);
/* Check if this is a '.7z' file */
if (string_is_equal(buf, ".7z"))
return delim;
}
delim++;
delim = strchr(delim, '#');
}
return NULL;
}
/**
* path_get_extension:
* @path : path
*
* Gets extension of file. Only '.'s
* after the last slash are considered.
*
* @return extension part from the path.
**/
const char *path_get_extension(const char *path)
{
const char *ext;
if (!string_is_empty(path) && ((ext = (char*)strrchr(path_basename(path), '.'))))
return ext + 1;
return "";
}
/**
* path_get_extension_mutable:
* @path : path
*
* Specialized version of path_get_extension(). Return
* value is mutable.
*
* Gets extension of file. Only '.'s
* after the last slash are considered.
*
* @return extension part from the path.
**/
char *path_get_extension_mutable(const char *path)
{
char *ext = NULL;
if (!string_is_empty(path) && ((ext = (char*)strrchr(path_basename(path), '.'))))
return ext;
return NULL;
}
/**
* path_remove_extension:
* @path : path
*
* Mutates path by removing its extension. Removes all
* text after and including the last '.'.
* Only '.'s after the last slash are considered.
*
* @return
* 1) If path has an extension, returns path with the
* extension removed.
* 2) If there is no extension, returns NULL.
* 3) If path is empty or NULL, returns NULL
**/
char *path_remove_extension(char *path)
{
char *last = !string_is_empty(path)
? (char*)strrchr(path_basename(path), '.') : NULL;
if (!last)
return NULL;
if (*last)
*last = '\0';
return path;
}
/**
* path_is_compressed_file:
* @path : path
*
* Checks if path is a compressed file.
*
* @return true if path is a compressed file, otherwise false.
**/
bool path_is_compressed_file(const char* path)
{
const char *ext = path_get_extension(path);
if (!string_is_empty(ext))
return ( string_is_equal_noncase(ext, "zip")
|| string_is_equal_noncase(ext, "apk")
|| string_is_equal_noncase(ext, "7z"));
return false;
}
/**
* 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"
*
* @return Length of the string copied into @out
*/
size_t fill_pathname(char *out_path, const char *in_path,
const char *replace, size_t size)
{
char tmp_path[PATH_MAX_LENGTH];
char *tok = NULL;
strlcpy(tmp_path, in_path, sizeof(tmp_path));
if ((tok = (char*)strrchr(path_basename(tmp_path), '.')))
*tok = '\0';
strlcpy(out_path, tmp_path, size);
return strlcat(out_path, replace, size);
}
/**
* find_last_slash:
* @str : path
* @size : size of path
*
* Find last slash in path. Tries to find
* a backslash on Windows too which takes precedence
* over regular slash.
* @return pointer to last slash/backslash found in @str.
**/
char *find_last_slash(const char *str)
{
const char *slash = strrchr(str, '/');
#ifdef _WIN32
const char *backslash = strrchr(str, '\\');
if (!slash || (backslash > slash))
return (char*)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;
const char *last_slash = find_last_slash(path);
if (!last_slash)
{
strlcat(path, PATH_DEFAULT_SLASH(), size);
return;
}
path_len = strlen(path);
/* Try to preserve slash type. */
if (last_slash != (path + path_len - 1))
{
path[path_len] = last_slash[0];
path[path_len+1] = '\0';
}
}
/**
* 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"
**/
size_t 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);
strlcat(in_dir, base, size);
return strlcat(in_dir, replace, size);
}
/**
* fill_pathname_base:
* @out : output path
* @in_path : input path
* @size : size of output path
*
* Copies basename of @in_path into @out_path.
*
* @return Length of the string copied into @out
**/
size_t fill_pathname_base(char *out, const char *in_path, size_t size)
{
const char *ptr = path_basename(in_path);
if (ptr)
return strlcpy(out, ptr, size);
return strlcpy(out, in_path, 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)
{
if (out_dir != in_path)
strlcpy(out_dir, in_path, size);
path_basedir(out_dir);
}
/**
* fill_pathname_parent_dir_name:
* @out_dir : output directory
* @in_dir : input directory
* @size : size of output directory
*
* Copies only the parent directory name of @in_dir into @out_dir.
* The two buffers must not overlap. Removes trailing '/'.
*
* @return true on success, false if a slash was not found in the path.
**/
bool fill_pathname_parent_dir_name(char *out_dir,
const char *in_dir, size_t size)
{
char *temp = strdup(in_dir);
char *last = find_last_slash(temp);
if (last && last[1] == 0)
{
*last = '\0';
last = find_last_slash(temp);
}
/* Cut the last part of the string (the filename) after the slash,
leaving the directory name (or nested directory names) only. */
if (last)
*last = '\0';
/* Point in_dir to the address of the last slash. */
/* If find_last_slash returns NULL, it means there was no slash in temp,
so use temp as-is. */
if (!(in_dir = find_last_slash(temp)))
in_dir = temp;
if (in_dir && in_dir[1])
{
/* If path starts with an slash, eliminate it. */
if (path_is_absolute(in_dir))
strlcpy(out_dir, in_dir + 1, size);
else
strlcpy(out_dir, in_dir, size);
free(temp);
return true;
}
free(temp);
return false;
}
/**
* 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 '/'.
* If the path was already at the root directory,
* @out_dir will be an empty string.
**/
void fill_pathname_parent_dir(char *out_dir,
const char *in_dir, size_t size)
{
size_t len = 0;
if (out_dir != in_dir)
len = strlcpy(out_dir, in_dir, size);
else
len = strlen(out_dir);
path_parent_dir(out_dir, len);
}
/**
* 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}"
**/
size_t fill_dated_filename(char *out_filename,
const char *ext, size_t size)
{
time_t cur_time = time(NULL);
struct tm tm_;
rtime_localtime(&cur_time, &tm_);
strftime(out_filename, size,
"RetroArch-%m%d-%H%M%S", &tm_);
return strlcat(out_filename, ext, size);
}
/**
* fill_str_dated_filename:
* @out_filename : output filename
* @in_str : input string
* @ext : extension of output filename
* @size : buffer size of output filename
*
* Creates a 'dated' filename prefixed by the string @in_str, and
* concatenates extension (@ext) to it.
*
* E.g.:
* out_filename = "RetroArch-{year}{month}{day}-{Hour}{Minute}{Second}.{@ext}"
*
* @return Length of the string copied into @out_path
**/
size_t fill_str_dated_filename(char *out_filename,
const char *in_str, const char *ext, size_t size)
{
char format[NAME_MAX_LENGTH];
struct tm tm_;
time_t cur_time = time(NULL);
rtime_localtime(&cur_time, &tm_);
strlcpy(out_filename, in_str, size);
if (string_is_empty(ext))
{
strftime(format, sizeof(format), "-%y%m%d-%H%M%S", &tm_);
return strlcat(out_filename, format, size);
}
strftime(format, sizeof(format), "-%y%m%d-%H%M%S.", &tm_);
strlcat(out_filename, format, size);
return 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 (!path || path[0] == '\0' || path[1] == '\0')
return;
if ((last = find_last_slash(path)))
last[1] = '\0';
else
{
path[0] = '.';
path[1] = PATH_DEFAULT_SLASH_C();
path[2] = '\0';
}
}
/**
* path_parent_dir:
* @path : path
* @len : length of @path
*
* Extracts parent directory by mutating path.
* Assumes that path is a directory. Keeps trailing '/'.
* If the path was already at the root directory, returns empty string
**/
void path_parent_dir(char *path, size_t len)
{
if (!path)
return;
if (len && PATH_CHAR_IS_SLASH(path[len - 1]))
{
bool path_was_absolute = path_is_absolute(path);
path[len - 1] = '\0';
if (path_was_absolute && !find_last_slash(path))
{
/* We removed the only slash from what used to be an absolute path.
* On Linux, this goes from "/" to an empty string and everything works fine,
* but on Windows, we went from C:\ to C:, which is not a valid path and that later
* gets errornously treated as a relative one by path_basedir and returns "./".
* What we really wanted is an empty string. */
path[0] = '\0';
return;
}
}
path_basedir(path);
}
/**
* path_basename:
* @path : path
*
* Get basename from @path.
*
* @return basename from path.
**/
const char *path_basename(const char *path)
{
/* We cut at the first compression-related hash */
const char *delim = path_get_archive_delim(path);
if (delim)
return delim + 1;
{
/* We cut at the last slash */
const char *last = find_last_slash(path);
if (last)
return last + 1;
}
return path;
}
/* Specialized version */
/**
* path_basename_nocompression:
* @path : path
*
* Specialized version of path_basename().
* Get basename from @path.
*
* @return basename from path.
**/
const char *path_basename_nocompression(const char *path)
{
/* We cut at the last slash */
const char *last = find_last_slash(path);
if (last)
return last + 1;
return path;
}
/**
* path_is_absolute:
* @path : path
*
* Checks if @path is an absolute path or a relative path.
*
* @return true if path is absolute, false if path is relative.
**/
bool path_is_absolute(const char *path)
{
if (string_is_empty(path))
return false;
if (path[0] == '/')
return true;
#if defined(_WIN32)
/* Many roads lead to Rome...
* Note: Drive letter can only be 1 character long */
return ( string_starts_with_size(path, "\\\\", STRLEN_CONST("\\\\"))
|| string_starts_with_size(path + 1, ":/", STRLEN_CONST(":/"))
|| string_starts_with_size(path + 1, ":\\", STRLEN_CONST(":\\")));
#elif defined(__wiiu__) || defined(VITA)
{
const char *seperator = strchr(path, ':');
return (seperator && (seperator[1] == '/'));
}
#endif
return false;
}
/**
* path_resolve_realpath:
* @buf : input and output buffer for path
* @size : size of buffer
* @resolve_symlinks : whether to resolve symlinks or not
*
* Resolves use of ".", "..", multiple slashes etc in absolute paths.
*
* Relative paths are rebased on the current working dir.
*
* @return @buf if successful, NULL otherwise.
* Note: Not implemented on consoles
* Note: Symlinks are only resolved on Unix-likes
* Note: The current working dir might not be what you expect,
* e.g. on Android it is "/"
* Use of fill_pathname_resolve_relative() should be prefered
**/
char *path_resolve_realpath(char *buf, size_t size, bool resolve_symlinks)
{
#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
#ifdef _WIN32
char *ret = NULL;
wchar_t *rel_path = utf8_to_utf16_string_alloc(buf);
if (rel_path)
{
wchar_t abs_path[PATH_MAX_LENGTH];
if (_wfullpath(abs_path, rel_path, PATH_MAX_LENGTH))
{
char *tmp = utf16_to_utf8_string_alloc(abs_path);
if (tmp)
{
strlcpy(buf, tmp, size);
free(tmp);
ret = buf;
}
}
free(rel_path);
}
return ret;
#else
char tmp[PATH_MAX_LENGTH];
size_t t;
char *p;
const char *next;
const char *buf_end;
if (resolve_symlinks)
{
strlcpy(tmp, buf, sizeof(tmp));
/* 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);
return NULL;
}
return buf;
}
t = 0; /* length of output */
buf_end = buf + strlen(buf);
if (!path_is_absolute(buf))
{
size_t len;
/* rebase on working directory */
if (!getcwd(tmp, PATH_MAX_LENGTH-1))
return NULL;
len = strlen(tmp);
t += len;
if (tmp[len-1] != '/')
tmp[t++] = '/';
if (string_is_empty(buf))
goto end;
p = buf;
}
else
{
/* UNIX paths can start with multiple '/', copy those */
for (p = buf; *p == '/'; p++)
tmp[t++] = '/';
}
/* p points to just after a slash while 'next' points to the next slash
* if there are no slashes, they point relative to where one would be */
do
{
if (!(next = strchr(p, '/')))
next = buf_end;
if ((next - p == 2 && p[0] == '.' && p[1] == '.'))
{
p += 3;
/* fail for illegal /.., //.. etc */
if (t == 1 || tmp[t-2] == '/')
return NULL;
/* delete previous segment in tmp by adjusting size t
* tmp[t-1] == '/', find '/' before that */
t = t-2;
while (tmp[t] != '/')
t--;
t++;
}
else if (next - p == 1 && p[0] == '.')
p += 2;
else if (next - p == 0)
p += 1;
else
{
/* fail when truncating */
if (t + next-p+1 > PATH_MAX_LENGTH-1)
return NULL;
while (p <= next)
tmp[t++] = *p++;
}
}while(next < buf_end);
end:
tmp[t] = '\0';
strlcpy(buf, tmp, size);
return buf;
#endif
#endif
return NULL;
}
/**
* path_relative_to:
* @out : buffer to write the relative path to
* @path : path to be expressed relatively
* @base : base directory to start out on
* @size : size of output buffer
*
* Turns @path into a path relative to @base and writes it to @out.
*
* @base is assumed to be a base directory, i.e. a path ending with '/' or '\'.
* Both @path and @base are assumed to be absolute paths without "." or "..".
*
* E.g. path /a/b/e/f.cg with base /a/b/c/d/ turns into ../../e/f.cg
*
* @return Length of the string copied into @out
**/
size_t path_relative_to(char *out,
const char *path, const char *base, size_t size)
{
size_t i, j;
const char *trimmed_path, *trimmed_base;
#ifdef _WIN32
/* For different drives, return absolute path */
if (
path
&& base
&& path[0] != '\0'
&& path[1] != '\0'
&& base[0] != '\0'
&& base[1] != '\0'
&& path[1] == ':'
&& base[1] == ':'
&& path[0] != base[0])
return strlcpy(out, path, size);
#endif
/* Trim common beginning */
for (i = 0, j = 0; path[i] && base[i] && path[i] == base[i]; i++)
if (path[i] == PATH_DEFAULT_SLASH_C())
j = i + 1;
trimmed_path = path+j;
trimmed_base = base+i;
/* Each segment of base turns into ".." */
out[0] = '\0';
for (i = 0; trimmed_base[i]; i++)
if (trimmed_base[i] == PATH_DEFAULT_SLASH_C())
strlcat(out, ".." PATH_DEFAULT_SLASH(), size);
return strlcat(out, trimmed_path, size);
}
/**
* 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))
{
strlcpy(out_path, in_path, size);
return;
}
if (out_path != in_refpath)
strlcpy(out_path, in_refpath, size);
path_basedir(out_path);
strlcat(out_path, in_path, size);
path_resolve_realpath(out_path, size, false);
}
/**
* 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.
*
* Deprecated. Use fill_pathname_join_special() instead
* if you can ensure @dir and @out_path won't overlap.
*
* @return Length of the string copied into @out_path
**/
size_t fill_pathname_join(char *out_path,
const char *dir, const char *path, size_t size)
{
if (out_path != dir)
strlcpy(out_path, dir, size);
if (*out_path)
fill_pathname_slash(out_path, size);
return strlcat(out_path, path, size);
}
/**
* fill_pathname_join_special:
* @out_path : output path
* @dir : directory. Cannot be identical to @out_path
* @path : path
* @size : size of output path
*
*
* Specialized version of fill_pathname_join.
* Unlike fill_pathname_join(),
* @dir and @out_path CANNOT be identical.
*
* Joins a directory (@dir) and path (@path) together.
* Makes sure not to get two consecutive slashes
* between directory and path.
*
* @return Length of the string copied into @out_path
**/
size_t fill_pathname_join_special(char *out_path,
const char *dir, const char *path, size_t size)
{
size_t len = strlcpy(out_path, dir, size);
if (*out_path)
{
const char *last_slash = find_last_slash(out_path);
if (last_slash)
{
/* Try to preserve slash type. */
if (last_slash != (out_path + len - 1))
{
out_path[len] = last_slash[0];
out_path[len+1] = '\0';
}
}
else
{
out_path[len] = PATH_DEFAULT_SLASH_C();
out_path[len+1] = '\0';
}
}
return strlcat(out_path, path, size);
}
size_t fill_pathname_join_special_ext(char *out_path,
const char *dir, const char *path,
const char *last, const char *ext,
size_t size)
{
fill_pathname_join(out_path, dir, path, size);
if (*out_path)
fill_pathname_slash(out_path, size);
strlcat(out_path, last, size);
return strlcat(out_path, ext, 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).
**/
size_t fill_pathname_join_delim(char *out_path, const char *dir,
const char *path, const char delim, size_t size)
{
size_t copied;
/* behavior of strlcpy is undefined if dst and src overlap */
if (out_path == dir)
copied = strlen(dir);
else
copied = strlcpy(out_path, dir, size);
out_path[copied] = delim;
out_path[copied+1] = '\0';
if (path)
return strlcat(out_path, path, size);
return copied;
}
size_t fill_pathname_expand_special(char *out_path,
const char *in_path, size_t size)
{
#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
char *app_dir = NULL;
if (in_path[0] == '~')
{
app_dir = (char*)malloc(PATH_MAX_LENGTH * sizeof(char));
fill_pathname_home_dir(app_dir, PATH_MAX_LENGTH * sizeof(char));
}
else if (in_path[0] == ':')
{
app_dir = (char*)malloc(PATH_MAX_LENGTH * sizeof(char));
app_dir[0] = '\0';
fill_pathname_application_dir(app_dir, PATH_MAX_LENGTH * sizeof(char));
}
if (app_dir)
{
if (*app_dir)
{
size_t src_size = strlcpy(out_path, app_dir, size);
out_path += src_size;
size -= src_size;
if (!PATH_CHAR_IS_SLASH(out_path[-1]))
{
src_size = strlcpy(out_path, PATH_DEFAULT_SLASH(), size);
out_path += src_size;
size -= src_size;
}
in_path += 2;
}
free(app_dir);
}
#endif
return strlcpy(out_path, in_path, size);
}
size_t fill_pathname_abbreviate_special(char *out_path,
const char *in_path, size_t size)
{
#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
unsigned i;
const char *candidates[3];
const char *notations[3];
char application_dir[PATH_MAX_LENGTH];
char home_dir[PATH_MAX_LENGTH];
application_dir[0] = '\0';
/* application_dir could be zero-string. Safeguard against this.
*
* Keep application dir in front of home, moving app dir to a
* new location inside home would break otherwise. */
/* ugly hack - use application_dir pointer
* before filling it in. C89 reasons */
candidates[0] = application_dir;
candidates[1] = home_dir;
candidates[2] = NULL;
notations [0] = ":";
notations [1] = "~";
notations [2] = NULL;
fill_pathname_application_dir(application_dir, sizeof(application_dir));
fill_pathname_home_dir(home_dir, sizeof(home_dir));
for (i = 0; candidates[i]; i++)
{
if (!string_is_empty(candidates[i]) &&
string_starts_with(in_path, candidates[i]))
{
size_t src_size = strlcpy(out_path, notations[i], size);
out_path += src_size;
size -= src_size;
in_path += strlen(candidates[i]);
if (!PATH_CHAR_IS_SLASH(*in_path))
{
strcpy_literal(out_path, PATH_DEFAULT_SLASH());
out_path++;
size--;
}
break; /* Don't allow more abbrevs to take place. */
}
}
#endif
return strlcpy(out_path, in_path, size);
}
/**
* pathname_conform_slashes_to_os:
*
* @path : path
*
* Leaf function.
*
* Changes the slashes to the correct kind for the os
* So forward slash on linux and backslash on Windows
**/
void pathname_conform_slashes_to_os(char *path)
{
/* Conform slashes to os standard so we get proper matching */
char *p;
for (p = path; *p; p++)
if (*p == '/' || *p == '\\')
*p = PATH_DEFAULT_SLASH_C();
}
/**
* pathname_make_slashes_portable:
* @path : path
*
* Leaf function.
*
* Change all slashes to forward so they are more
* portable between Windows and Linux
**/
void pathname_make_slashes_portable(char *path)
{
/* Conform slashes to os standard so we get proper matching */
char *p;
for (p = path; *p; p++)
if (*p == '/' || *p == '\\')
*p = '/';
}
/**
* get_pathname_num_slashes:
* @in_path : input path
*
* Leaf function.
*
* Get the number of slashes in a path.
*
* @return number of slashes found in @in_path.
**/
static int get_pathname_num_slashes(const char *in_path)
{
int num_slashes = 0;
int i = 0;
for (i = 0; i < PATH_MAX_LENGTH; i++)
{
if (PATH_CHAR_IS_SLASH(in_path[i]))
num_slashes++;
if (in_path[i] == '\0')
break;
}
return num_slashes;
}
/**
* fill_pathname_abbreviated_or_relative:
*
* Fills the supplied path with either the abbreviated path or
* the relative path, which ever one has less depth / number of slashes
*
* If lengths of abbreviated and relative paths are the same,
* the relative path will be used
* @in_path can be an absolute, relative or abbreviated path
*
* @return Length of the string copied into @out_path
**/
size_t fill_pathname_abbreviated_or_relative(char *out_path,
const char *in_refpath, const char *in_path, size_t size)
{
char in_path_conformed[PATH_MAX_LENGTH];
char in_refpath_conformed[PATH_MAX_LENGTH];
char expanded_path[PATH_MAX_LENGTH];
char absolute_path[PATH_MAX_LENGTH];
char relative_path[PATH_MAX_LENGTH];
char abbreviated_path[PATH_MAX_LENGTH];
expanded_path[0] = '\0';
absolute_path[0] = '\0';
relative_path[0] = '\0';
abbreviated_path[0] = '\0';
strlcpy(in_path_conformed, in_path, sizeof(in_path_conformed));
strlcpy(in_refpath_conformed, in_refpath, sizeof(in_refpath_conformed));
pathname_conform_slashes_to_os(in_path_conformed);
pathname_conform_slashes_to_os(in_refpath_conformed);
/* Expand paths which start with :\ to an absolute path */
fill_pathname_expand_special(expanded_path,
in_path_conformed, sizeof(expanded_path));
/* Get the absolute path if it is not already */
if (path_is_absolute(expanded_path))
strlcpy(absolute_path, expanded_path, PATH_MAX_LENGTH);
else
fill_pathname_resolve_relative(absolute_path,
in_refpath_conformed, in_path_conformed, PATH_MAX_LENGTH);
pathname_conform_slashes_to_os(absolute_path);
/* Get the relative path and see how many directories long it is */
path_relative_to(relative_path, absolute_path,
in_refpath_conformed, sizeof(relative_path));
/* Get the abbreviated path and see how many directories long it is */
fill_pathname_abbreviate_special(abbreviated_path,
absolute_path, sizeof(abbreviated_path));
/* Use the shortest path, preferring the relative path*/
if ( get_pathname_num_slashes(relative_path) <=
get_pathname_num_slashes(abbreviated_path))
return strlcpy(out_path, relative_path, size);
return strlcpy(out_path, abbreviated_path, size);
}
/**
* path_basedir:
* @path : path
*
* Extracts base directory by mutating path.
* Keeps trailing '/'.
**/
void path_basedir_wrapper(char *path)
{
char *last = NULL;
if (!path || path[0] == '\0' || path[1] == '\0')
return;
#ifdef HAVE_COMPRESSION
/* We want to find the directory with the archive in basedir. */
if ((last = (char*)path_get_archive_delim(path)))
*last = '\0';
#endif
if ((last = find_last_slash(path)))
last[1] = '\0';
else
{
path[0] = '.';
path[1] = PATH_DEFAULT_SLASH_C();
path[2] = '\0';
}
}
#if !defined(RARCH_CONSOLE) && defined(RARCH_INTERNAL)
void fill_pathname_application_path(char *s, size_t len)
{
size_t i;
#ifdef __APPLE__
CFBundleRef bundle = CFBundleGetMainBundle();
#endif
#ifdef _WIN32
DWORD ret = 0;
wchar_t wstr[PATH_MAX_LENGTH] = {0};
#endif
#ifdef __HAIKU__
image_info info;
int32_t cookie = 0;
#endif
(void)i;
if (!len)
return;
#if defined(_WIN32)
#ifdef LEGACY_WIN32
ret = GetModuleFileNameA(NULL, s, len);
#else
ret = GetModuleFileNameW(NULL, wstr, ARRAY_SIZE(wstr));
if (*wstr)
{
char *str = utf16_to_utf8_string_alloc(wstr);
if (str)
{
strlcpy(s, str, len);
free(str);
}
}
#endif
s[ret] = '\0';
#elif defined(__APPLE__)
if (bundle)
{
CFURLRef bundle_url = CFBundleCopyBundleURL(bundle);
CFStringRef bundle_path = CFURLCopyPath(bundle_url);
CFStringGetCString(bundle_path, s, len, kCFStringEncodingUTF8);
#ifdef HAVE_COCOATOUCH
{
/* This needs to be done so that the path becomes
* /private/var/... and this
* is used consistently throughout for the iOS bundle path */
char resolved_bundle_dir_buf[PATH_MAX_LENGTH] = {0};
if (realpath(s, resolved_bundle_dir_buf))
{
size_t _len = strlcpy(s, resolved_bundle_dir_buf, len - 1);
s[_len ] = '/';
s[_len+1] = '\0';
}
}
#endif
CFRelease(bundle_path);
CFRelease(bundle_url);
#ifndef HAVE_COCOATOUCH
/* Not sure what this does but it breaks
* stuff for iOS, so skipping */
strlcat(s, "nobin", len);
#endif
return;
}
#elif defined(__HAIKU__)
while (get_next_image_info(0, &cookie, &info) == B_OK)
{
if (info.type == B_APP_IMAGE)
{
strlcpy(s, info.name, len);
return;
}
}
#elif defined(__QNX__)
char *buff = malloc(len);
if (_cmdname(buff))
strlcpy(s, buff, len);
free(buff);
#else
{
pid_t pid;
static const char *exts[] = { "exe", "file", "path/a.out" };
char link_path[255];
link_path[0] = *s = '\0';
pid = getpid();
/* Linux, BSD and Solaris paths. Not standardized. */
for (i = 0; i < ARRAY_SIZE(exts); i++)
{
ssize_t ret;
snprintf(link_path, sizeof(link_path), "/proc/%u/%s",
(unsigned)pid, exts[i]);
if ((ret = readlink(link_path, s, len - 1)) >= 0)
{
s[ret] = '\0';
return;
}
}
}
#endif
}
void fill_pathname_application_dir(char *s, size_t len)
{
#ifdef __WINRT__
strlcpy(s, uwp_dir_install, len);
#else
fill_pathname_application_path(s, len);
path_basedir_wrapper(s);
#endif
}
void fill_pathname_home_dir(char *s, size_t len)
{
#ifdef __WINRT__
const char *home = uwp_dir_data;
#else
const char *home = getenv("HOME");
#endif
if (home)
strlcpy(s, home, len);
else
*s = 0;
}
#endif
bool is_path_accessible_using_standard_io(const char *path)
{
#ifdef __WINRT__
return GetFileAttributesA(path) != INVALID_FILE_ATTRIBUTES;
#else
return true;
#endif
}
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