shell32: Add xdg-user-dirs lookup code.
This commit is contained in:
Lei Zhang
Alexandre Julliard
parent
371afffd35
commit
f5ba1c21be
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@ -16,10 +16,38 @@
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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*
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* XDG_UserDirLookup() and helper functions are based on code from:
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* http://www.freedesktop.org/wiki/Software/xdg-user-dirs
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*
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* Copyright (c) 2007 Red Hat, inc
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*
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* From the xdg-user-dirs license:
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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@ -712,3 +740,230 @@ char *XDG_GetStringValue(XDG_PARSED_FILE *file, const char *group_name, const ch
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return NULL;
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}
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/* Get the name of the xdg configuration file.
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*
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* [in] home_dir - $HOME
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* [out] config_file - the name of the configuration file
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*/
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static HRESULT get_xdg_config_file(char * home_dir, char ** config_file)
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{
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char *config_home;
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config_home = getenv("XDG_CONFIG_HOME");
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if (!config_home || !config_home[0])
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{
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*config_file = HeapAlloc(GetProcessHeap(), 0, strlen(home_dir) + strlen("/.config/user-dirs.dirs") + 1);
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if (!*config_file)
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return E_OUTOFMEMORY;
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strcpy(*config_file, home_dir);
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strcat(*config_file, "/.config/user-dirs.dirs");
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}
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else
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{
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*config_file = HeapAlloc(GetProcessHeap(), 0, strlen(config_home) + strlen("/user-dirs.dirs") + 1);
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if (!*config_file)
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return E_OUTOFMEMORY;
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strcpy(*config_file, config_home);
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strcat(*config_file, "/user-dirs.dirs");
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}
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return S_OK;
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}
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/* Parse the key in a line in the xdg-user-dir config file.
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* i.e. XDG_PICTURES_DIR="$HOME/Pictures"
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* ^ ^
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*
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* [in] xdg_dirs - array of xdg directories to look for
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* [in] num_dirs - number of elements in xdg_dirs
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* [in/out] p_ptr - pointer to where we are in the buffer
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* Returns the index to xdg_dirs if we find the key, or -1 on error.
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*/
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static int parse_config1(const char ** xdg_dirs, const unsigned int num_dirs, char ** p_ptr)
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{
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char *p;
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int i;
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p = *p_ptr;
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while (*p == ' ' || *p == '\t')
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p++;
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if (strncmp(p, "XDG_", 4))
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return -1;
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p += 4;
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for (i = 0; i < num_dirs; i++)
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{
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if (!strncmp(p, xdg_dirs[i], strlen(xdg_dirs[i])))
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{
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p += strlen(xdg_dirs[i]);
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break;
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}
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}
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if (i == num_dirs)
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return -1;
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if (strncmp(p, "_DIR", 4))
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return -1;
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p += 4;
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while (*p == ' ' || *p == '\t')
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p++;
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if (*p != '=')
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return -1;
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p++;
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while (*p == ' ' || *p == '\t')
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p++;
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if (*p != '"')
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return -1;
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p++;
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*p_ptr = p;
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return i;
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}
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/* Parse the value in a line in the xdg-user-dir config file.
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* i.e. XDG_PICTURES_DIR="$HOME/Pictures"
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* ^ ^
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*
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* [in] p - pointer to the buffer
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* [in] home_dir - $HOME
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* [out] out_ptr - the directory name
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*/
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static HRESULT parse_config2(char * p, const char * home_dir, char ** out_ptr)
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{
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BOOL relative;
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char *out, *d;
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relative = FALSE;
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if (!strncmp(p, "$HOME/", 6))
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{
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p += 6;
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relative = TRUE;
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}
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else if (*p != '/')
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return E_FAIL;
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if (relative)
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{
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out = HeapAlloc(GetProcessHeap(), 0, strlen(home_dir) + strlen(p) + 2);
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if (!out)
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return E_OUTOFMEMORY;
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strcpy(out, home_dir);
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strcat(out, "/");
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}
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else
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{
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out = HeapAlloc(GetProcessHeap(), 0, strlen(p) + 1);
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if (!out)
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return E_OUTOFMEMORY;
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*out = 0;
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}
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d = out + strlen(out);
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while (*p && *p != '"')
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{
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if ((*p == '\\') && (*(p + 1) != 0))
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p++;
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*d++ = *p++;
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}
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*d = 0;
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*out_ptr = out;
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return S_OK;
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}
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/* Parse part of a line in the xdg-user-dir config file.
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* i.e. XDG_PICTURES_DIR="$HOME/Pictures"
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* ^ ^
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*
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* The calling function is responsible for freeing all elements of out_ptr as
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* well as out_ptr itself.
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*
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* [in] xdg_dirs - array of xdg directories to look for
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* [in] num_dirs - number of elements in xdg_dirs
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* [out] out_ptr - an array of the xdg directories names
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*/
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HRESULT XDG_UserDirLookup(const char ** xdg_dirs, const unsigned int num_dirs, char *** out_ptr)
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{
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FILE *file;
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char **out;
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char *home_dir, *config_file;
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char buffer[512];
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int i, len;
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HRESULT hr;
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*out_ptr = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, num_dirs * sizeof(char *));
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out = *out_ptr;
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if (!out)
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return E_OUTOFMEMORY;
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home_dir = getenv("HOME");
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if (!home_dir)
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{
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hr = E_FAIL;
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goto xdg_user_dir_lookup_error;
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}
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hr = get_xdg_config_file(home_dir, &config_file);
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if (FAILED(hr))
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goto xdg_user_dir_lookup_error;
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file = fopen(config_file, "r");
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HeapFree(GetProcessHeap(), 0, config_file);
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if (!file)
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{
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hr = E_HANDLE;
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goto xdg_user_dir_lookup_error;
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}
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while (fgets(buffer, sizeof(buffer), file))
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{
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int idx;
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char *p;
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/* Remove newline at end */
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len = strlen(buffer);
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if (len > 0 && buffer[len-1] == '\n')
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buffer[len-1] = 0;
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/* Parse the key */
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p = buffer;
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idx = parse_config1(xdg_dirs, num_dirs, &p);
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if (idx < 0)
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continue;
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if (out[idx])
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continue;
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/* Parse the value */
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hr = parse_config2(p, home_dir, &out[idx]);
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if (FAILED(hr))
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{
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if (hr == E_OUTOFMEMORY)
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goto xdg_user_dir_lookup_error;
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continue;
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}
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}
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hr = S_OK;
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/* Remove entries for directories that do no exist */
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for (i = 0; i < num_dirs; i++)
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{
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struct stat statFolder;
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if (!out[i])
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continue;
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if (!stat(out[i], &statFolder) && S_ISDIR(statFolder.st_mode))
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continue;
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HeapFree(GetProcessHeap(), 0, out[i]);
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out[i] = NULL;
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}
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xdg_user_dir_lookup_error:
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if (FAILED(hr))
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{
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for (i = 0; i < num_dirs; i++) HeapFree(GetProcessHeap(), 0, out[i]);
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HeapFree(GetProcessHeap(), 0, out_ptr);
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}
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return hr;
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}
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@ -47,5 +47,6 @@ HRESULT TRASH_UnpackItemID(LPCSHITEMID id, TRASH_ELEMENT *element, WIN32_FIND_DA
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HRESULT TRASH_EnumItems(LPITEMIDLIST **pidls, int *count);
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void TRASH_DisposeElement(TRASH_ELEMENT *element);
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HRESULT XDG_UserDirLookup(const char ** xdg_dirs, const unsigned int num_dirs, char *** out_ptr);
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#endif /* ndef __XDG_H__ */
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