RetroArch/file_path.c

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/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
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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-
* ation, either version 3 of the License, or (at your option) any later version.
*
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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
* PURPOSE. See the GNU General Public License for more details.
*
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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/>.
*/
#include "file.h"
#include "general.h"
#include <stdlib.h>
#include "boolean.h"
#include <string.h>
#include <time.h>
#include "compat/strl.h"
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#include "compat/posix_string.h"
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#if defined(__CELLOS_LV2__) && !defined(__PSL1GHT__) || defined(__BLACKBERRY_QNX__)
#include <unistd.h> //stat() is defined here
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#endif
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#if defined(__CELLOS_LV2__)
#ifndef S_ISDIR
#define S_ISDIR(x) (x & 0040000)
#endif
#endif
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#if defined(_WIN32)
#ifdef _MSC_VER
#define setmode _setmode
#endif
#ifdef _XBOX
#include <xtl.h>
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#define INVALID_FILE_ATTRIBUTES -1
#else
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#include <io.h>
#include <fcntl.h>
#include <windows.h>
#endif
#else
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
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#endif
void string_list_free(struct string_list *list)
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{
if (!list)
return;
for (size_t i = 0; i < list->size; i++)
free(list->elems[i].data);
free(list->elems);
free(list);
}
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static bool string_list_capacity(struct string_list *list, size_t cap)
{
rarch_assert(cap > list->size);
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struct string_list_elem *new_data = (struct string_list_elem*)realloc(list->elems, cap * sizeof(*new_data));
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if (!new_data)
return false;
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list->elems = new_data;
list->cap = cap;
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return true;
}
static struct string_list *string_list_new(void)
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{
struct string_list *list = (struct string_list*)calloc(1, sizeof(*list));
if (!list)
return NULL;
if (!string_list_capacity(list, 32))
{
string_list_free(list);
return NULL;
}
return list;
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}
static bool string_list_append(struct string_list *list, const char *elem, union string_list_elem_attr attr)
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{
if (list->size >= list->cap &&
!string_list_capacity(list, list->cap * 2))
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return false;
char *dup = strdup(elem);
if (!dup)
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return false;
list->elems[list->size].data = dup;
list->elems[list->size].attr = attr;
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list->size++;
return true;
}
struct string_list *string_split(const char *str, const char *delim)
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{
char *copy = NULL;
const char *tmp = NULL;
struct string_list *list = string_list_new();
if (!list)
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goto error;
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copy = strdup(str);
if (!copy)
goto error;
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char *save;
tmp = strtok_r(copy, delim, &save);
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while (tmp)
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{
union string_list_elem_attr attr;
memset(&attr, 0, sizeof(attr));
if (!string_list_append(list, tmp, attr))
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goto error;
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tmp = strtok_r(NULL, delim, &save);
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}
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free(copy);
return list;
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error:
string_list_free(list);
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free(copy);
return NULL;
}
bool string_list_find_elem(const struct string_list *list, const char *elem)
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{
if (!list)
return false;
for (size_t i = 0; i < list->size; i++)
{
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if (strcasecmp(list->elems[i].data, elem) == 0)
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return true;
}
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return false;
}
bool string_list_find_elem_prefix(const struct string_list *list, const char *prefix, const char *elem)
{
if (!list)
return false;
char prefixed[PATH_MAX];
snprintf(prefixed, sizeof(prefixed), "%s%s", prefix, elem);
for (size_t i = 0; i < list->size; i++)
{
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if (strcasecmp(list->elems[i].data, elem) == 0 ||
strcasecmp(list->elems[i].data, prefixed) == 0)
return true;
}
return false;
}
const char *path_get_extension(const char *path)
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{
const char *ext = strrchr(path, '.');
if (ext)
return ext + 1;
else
return "";
}
static int qstrcmp_plain(const void *a_, const void *b_)
{
const struct string_list_elem *a = (const struct string_list_elem*)a_;
const struct string_list_elem *b = (const struct string_list_elem*)b_;
return strcasecmp(a->data, b->data);
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}
static int qstrcmp_dir(const void *a_, const void *b_)
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{
const struct string_list_elem *a = (const struct string_list_elem*)a_;
const struct string_list_elem *b = (const struct string_list_elem*)b_;
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// Sort directories before files.
int a_dir = a->attr.b;
int b_dir = b->attr.b;
if (a_dir != b_dir)
return b_dir - a_dir;
else
return strcasecmp(a->data, b->data);
}
void dir_list_sort(struct string_list *list, bool dir_first)
{
if (!list)
return;
qsort(list->elems, list->size, sizeof(struct string_list_elem),
dir_first ? qstrcmp_dir : qstrcmp_plain);
}
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#ifdef _WIN32 // Because the API is just fucked up ...
struct string_list *dir_list_new(const char *dir, const char *ext, bool include_dirs)
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{
struct string_list *list = string_list_new();
if (!list)
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return NULL;
HANDLE hFind = INVALID_HANDLE_VALUE;
WIN32_FIND_DATA ffd;
char path_buf[PATH_MAX];
snprintf(path_buf, sizeof(path_buf), "%s\\*", dir);
struct string_list *ext_list = NULL;
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if (ext)
ext_list = string_split(ext, "|");
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hFind = FindFirstFile(path_buf, &ffd);
if (hFind == INVALID_HANDLE_VALUE)
goto error;
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do
{
const char *name = ffd.cFileName;
const char *file_ext = path_get_extension(name);
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bool is_dir = ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
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if (!include_dirs && is_dir)
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continue;
if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
continue;
if (!is_dir && ext_list && !string_list_find_elem_prefix(ext_list, ".", file_ext))
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continue;
char file_path[PATH_MAX];
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fill_pathname_join(file_path, dir, name, sizeof(file_path));
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union string_list_elem_attr attr;
attr.b = is_dir;
if (!string_list_append(list, file_path, attr))
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goto error;
}
while (FindNextFile(hFind, &ffd) != 0);
FindClose(hFind);
string_list_free(ext_list);
return list;
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error:
RARCH_ERR("Failed to open directory: \"%s\"\n", dir);
if (hFind != INVALID_HANDLE_VALUE)
FindClose(hFind);
string_list_free(list);
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string_list_free(ext_list);
return NULL;
}
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#else
static bool dirent_is_directory(const char *path, const struct dirent *entry)
{
#if defined(PSP)
return (entry->d_stat.st_attr & FIO_SO_IFDIR) == FIO_SO_IFDIR;
#elif defined(DT_DIR)
if (entry->d_type == DT_DIR)
return true;
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else if (entry->d_type == DT_UNKNOWN // This can happen on certain file systems.
|| entry->d_type == DT_LNK)
return path_is_directory(path);
else
return false;
#else // dirent struct doesn't have d_type, do it the slow way ...
return path_is_directory(path);
#endif
}
struct string_list *dir_list_new(const char *dir, const char *ext, bool include_dirs)
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{
struct string_list *list = string_list_new();
if (!list)
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return NULL;
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DIR *directory = NULL;
const struct dirent *entry = NULL;
struct string_list *ext_list = NULL;
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if (ext)
ext_list = string_split(ext, "|");
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directory = opendir(dir);
if (!directory)
goto error;
while ((entry = readdir(directory)))
{
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const char *name = entry->d_name;
const char *file_ext = path_get_extension(name);
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char file_path[PATH_MAX];
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fill_pathname_join(file_path, dir, name, sizeof(file_path));
bool is_dir = dirent_is_directory(file_path, entry);
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if (!include_dirs && is_dir)
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continue;
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if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
continue;
if (!is_dir && ext_list && !string_list_find_elem_prefix(ext_list, ".", file_ext))
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continue;
union string_list_elem_attr attr;
attr.b = is_dir;
if (!string_list_append(list, file_path, attr))
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goto error;
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}
closedir(directory);
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string_list_free(ext_list);
return list;
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error:
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RARCH_ERR("Failed to open directory: \"%s\"\n", dir);
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if (directory)
closedir(directory);
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string_list_free(list);
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string_list_free(ext_list);
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return NULL;
}
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#endif
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void dir_list_free(struct string_list *list)
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{
string_list_free(list);
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}
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static bool path_char_is_slash(char c)
{
#ifdef _WIN32
return (c == '/') || (c == '\\');
#else
return c == '/';
#endif
}
static const char *path_default_slash(void)
{
#ifdef _WIN32
return "\\";
#else
return "/";
#endif
}
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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
}
bool path_file_exists(const char *path)
{
FILE *dummy = fopen(path, "rb");
if (dummy)
{
fclose(dummy);
return true;
}
return false;
}
void fill_pathname(char *out_path, const char *in_path, const char *replace, size_t size)
{
char tmp_path[PATH_MAX];
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rarch_assert(strlcpy(tmp_path, in_path, sizeof(tmp_path)) < sizeof(tmp_path));
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char *tok = strrchr(tmp_path, '.');
if (tok)
*tok = '\0';
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rarch_assert(strlcpy(out_path, tmp_path, size) < size);
rarch_assert(strlcat(out_path, replace, size) < size);
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}
void fill_pathname_noext(char *out_path, const char *in_path, const char *replace, size_t size)
{
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rarch_assert(strlcpy(out_path, in_path, size) < size);
rarch_assert(strlcat(out_path, replace, size) < size);
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}
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;
}
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// Assumes path is a directory. Appends a slash
// if not already there.
static void fill_pathname_slash(char *path, size_t size)
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{
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size_t path_len = strlen(path);
const char *last_slash = find_last_slash(path);
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// Try to preserve slash type.
if (last_slash && (last_slash != (path + path_len - 1)))
{
char join_str[2] = {*last_slash};
rarch_assert(strlcat(path, join_str, size) < size);
}
else if (!last_slash)
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rarch_assert(strlcat(path, path_default_slash(), size) < size);
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}
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void fill_pathname_dir(char *in_dir, const char *in_basename, const char *replace, size_t size)
{
fill_pathname_slash(in_dir, size);
const char *base = path_basename(in_basename);
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rarch_assert(strlcat(in_dir, base, size) < size);
rarch_assert(strlcat(in_dir, replace, size) < size);
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}
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void fill_pathname_base(char *out, const char *in_path, size_t size)
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{
const char *ptr = find_last_slash(in_path);
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if (ptr)
ptr++;
else
ptr = in_path;
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rarch_assert(strlcpy(out, ptr, size) < size);
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}
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);
}
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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);
}
void fill_dated_filename(char *out_filename, const char *ext, size_t size)
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{
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);
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}
void path_basedir(char *path)
{
if (strlen(path) < 2)
return;
char *last = find_last_slash(path);
if (last)
last[1] = '\0';
else
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snprintf(path, 3, ".%s", path_default_slash());
}
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void path_parent_dir(char *path)
{
size_t len = strlen(path);
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if (len && path_char_is_slash(path[len - 1]))
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path[len - 1] = '\0';
path_basedir(path);
}
const char *path_basename(const char *path)
{
const char *last = find_last_slash(path);
if (last)
return last + 1;
else
return path;
}
bool path_is_absolute(const char *path)
{
#ifdef _WIN32
// Many roads lead to Rome ...
return path[0] == '/' || (strstr(path, "\\\\") == path) || strstr(path, ":/") || strstr(path, ":\\") || strstr(path, ":\\\\");
#else
return path[0] == '/';
#endif
}
void path_resolve_realpath(char *buf, size_t size)
{
#ifndef RARCH_CONSOLE
char tmp[PATH_MAX];
strlcpy(tmp, buf, sizeof(tmp));
#ifdef _WIN32
if (!_fullpath(buf, tmp, size))
strlcpy(buf, tmp, size);
#else
rarch_assert(size >= PATH_MAX);
// NOTE: realpath() expects at least PATH_MAX bytes in buf.
// Technically, PATH_MAX 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
#else
(void)buf;
(void)size;
#endif
}
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);
else
{
rarch_assert(strlcpy(out_path, in_refpath, size) < size);
path_basedir(out_path);
rarch_assert(strlcat(out_path, in_path, size) < size);
}
}
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void fill_pathname_join(char *out_path, const char *dir, const char *path, size_t size)
{
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rarch_assert(strlcpy(out_path, dir, size) < size);
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if (*out_path)
fill_pathname_slash(out_path, size);
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rarch_assert(strlcat(out_path, path, size) < size);
}
#ifndef RARCH_CONSOLE
void fill_pathname_application_path(char *buf, size_t size)
{
if (!size)
return;
#ifdef _WIN32
DWORD ret = GetModuleFileName(GetModuleHandle(NULL), buf, size - 1);
buf[ret] = '\0';
#else
*buf = '\0';
pid_t pid = getpid();
char link_path[PATH_MAX];
static const char *exts[] = { "exe", "file", "path/a.out" }; // Linux, BSD and Solaris paths. Not standardized.
for (unsigned i = 0; i < ARRAY_SIZE(exts); i++)
{
snprintf(link_path, sizeof(link_path), "/proc/%u/%s", (unsigned)pid, exts[i]);
ssize_t ret = readlink(link_path, buf, size - 1);
if (ret >= 0)
{
buf[ret] = '\0';
return;
}
}
RARCH_ERR("Cannot resolve application path! This should not happen.\n");
#endif
}
#endif