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/*
* Copyright © 2008-2009 Ryan Lortie
* Copyright © 2010 Codethink Limited
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "dconf-paths.h"
/**
* SECTION:paths
* @title: DConf Paths
* @short_description: utility functions to validate dconf paths
*
* Various places in the dconf API speak of "paths", "keys", "dirs" and
* relative versions of each of these. This file contains functions to
* check if a given string is a valid member of each of these classes
* and to report errors when a string is not.
*
* See each function in this section for a precise description of what
* makes a string a valid member of a given class.
**/
#define vars gchar c, l
#define DCONF_ERROR 0
#define DCONF_ERROR_PATH 0
#define nonnull \
if (string == NULL) { \
g_set_error (error, DCONF_ERROR, DCONF_ERROR_PATH, \
"%s not specified", type); \
return FALSE; \
}
#define absolute \
if ((l = *string++) != '/') \
{ \
g_set_error (error, DCONF_ERROR, DCONF_ERROR_PATH, \
"dconf %s must begin with a slash", type); \
return FALSE; \
}
#define relative \
if (*string == '/') \
{ \
g_set_error (error, DCONF_ERROR, DCONF_ERROR_PATH, \
"dconf %s must not begin with a slash", type); \
return FALSE; \
} \
l = '/'
#define no_double_slash \
while ((c = *string++)) \
{ \
if (c == '/' && l == '/') \
{ \
g_set_error (error, DCONF_ERROR, DCONF_ERROR_PATH, \
"dconf %s must not contain two " \
"consecutive slashes", type); \
return FALSE; \
} \
l = c; \
} \
#define path \
return TRUE
#define key \
if (l == '/') \
{ \
g_set_error (error, DCONF_ERROR, DCONF_ERROR_PATH, \
"dconf %s must not end with a slash", type); \
return FALSE; \
} \
return TRUE
#define dir \
if (l != '/') \
{ \
g_set_error (error, DCONF_ERROR, DCONF_ERROR_PATH, \
"dconf %s must end with a slash", type); \
return FALSE; \
} \
return TRUE
/**
* dconf_is_path:
* @string: a string
* @error: a pointer to a #GError, or %NULL, set when %FALSE is returned
*
* Checks if @string is a valid dconf path. dconf keys must start with
* '/' and not contain '//'.
*
* A dconf path may be either a key or a dir. See dconf_is_key() and
* dconf_is_dir() for examples of each.
*
* Returns: %TRUE if @string is a path
**/
gboolean
dconf_is_path (const gchar *string,
GError **error)
{
#define type "path"
vars; nonnull; absolute; no_double_slash; path;
#undef type
}
/**
* dconf_is_key:
* @string: a string
* @error: a pointer to a #GError, or %NULL, set when %FALSE is returned
*
* Checks if @string is a valid dconf key. dconf keys must start with
* '/', not contain '//' and not end with '/'.
*
* A dconf key is the potential location of a single value within the
* database.
*
* "/a", "/a/b" and "/a/b/c" are examples of keys. "", "/", "a", "a/b",
* "//a/b", "/a//b", and "/a/" are examples of strings that are not
* keys.
*
* Returns: %TRUE if @string is a key
**/
gboolean
dconf_is_key (const gchar *string,
GError **error)
{
#define type "key"
vars; nonnull; absolute; no_double_slash; key;
#undef type
}
/**
* dconf_is_dir:
* @string: a string
* @error: a pointer to a #GError, or %NULL, set when %FALSE is returned
*
* Checks if @string is a valid dconf dir. dconf dirs must start and
* end with '/' and not contain '//'.
*
* A dconf dir refers to a subtree of the database that can contain
* other dirs or keys. If @string is a dir, then it will be a prefix of
* any key or dir contained within it.
*
* "/", "/a/" and "/a/b/" are examples of dirs. "", "a/", "a/b/",
* "//a/b/", "/a//b/" and "/a" are examples of strings that are not
* dirs.
*
* Returns: %TRUE if @string is a dir
**/
gboolean
dconf_is_dir (const gchar *string,
GError **error)
{
#define type "dir"
vars; nonnull; absolute; no_double_slash; dir;
#undef type
}
/**
* dconf_is_rel_path:
* @string: a string
* @error: a pointer to a #GError, or %NULL, set when %FALSE is returned
*
* Checks if @string is a valid dconf relative path. A relative path is
* a string that, when concatenated to a dir, forms a valid dconf path.
* This means that a rel must not start with a '/' or contain '//'.
*
* A dconf rel may be either a relative key or a relative dir. See
* dconf_is_rel_key() and dconf_is_rel_dir() for examples of each.
*
* Returns: %TRUE if @string is a relative path
**/
gboolean
dconf_is_rel_path (const gchar *string,
GError **error)
{
#define type "relative path"
vars; nonnull; relative; no_double_slash; path;
#undef type
}
/**
* dconf_is_rel_key:
* @string: a string
* @error: a pointer to a #GError, or %NULL, set when %FALSE is returned
*
* Checks if @string is a valid dconf relative key. A relative key is a
* string that, when concatenated to a dir, forms a valid dconf key.
* This means that a relative key must not start or end with a '/' or
* contain '//'.
*
* "a", "a/b" and "a/b/c" are examples of relative keys. "", "/", "/a",
* "/a/b", "//a/b", "/a//b", and "a/" are examples of strings that are
* not relative keys.
*
* Returns: %TRUE if @string is a relative key
**/
gboolean
dconf_is_rel_key (const gchar *string,
GError **error)
{
#define type "relative key"
vars; nonnull; relative; no_double_slash; key;
#undef type
}
/**
* dconf_is_rel_dir:
* @string: a string
* @error: a pointer to a #GError, or %NULL, set when %FALSE is returned
*
* Checks if @string is a valid dconf relative dir. A relative dir is a
* string that, when appended to a dir, forms a valid dconf dir. This
* means that a relative dir must not start with a '/' or contain '//'
* and must end with a '/' except in the case that it is the empty
* string (in which case the path specified by appending the rel to a
* directory is the original directory).
*
* "", "a/" and "a/b/" are examples of relative dirs. "/", "/a/",
* "/a/b/", "//a/b/", "a//b/" and "a" are examples of strings that are
* not relative dirs.
*
* Returns: %TRUE if @string is a relative dir
**/
gboolean
dconf_is_rel_dir (const gchar *string,
GError **error)
{
#define type "relative dir"
vars; nonnull; relative; no_double_slash; dir;
#undef type
}
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