gio/gschema-compile.c - third_party/glib - Git at Google

 /*
  * 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 <string.h>
 #include <unistd.h>
 #include <stdio.h>

 #include "gvdb/gvdb-builder.h"

 typedef struct
 {
   gboolean byteswap;

   GVariantBuilder key_options;
   GHashTable *schemas;
   gchar *schemalist_domain;

   GHashTable *schema;
   GvdbItem *schema_root;
   gchar *schema_domain;

   GString *string;

   GvdbItem *key;
   GVariant *value;
   GVariant *min, *max;
   GVariant *strings;
   gchar l10n;
   gchar *context;
   GVariantType *type;
 } ParseState;

 static gboolean
 is_valid_keyname (const gchar  *key,
                   GError      **error)
 {
   gint i;

   if (key[0] == '\0')
     {
       g_set_error_literal (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                            "empty names are not permitted");
       return FALSE;
     }

   if (!g_ascii_islower (key[0]))
     {
       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                    "invalid name '%s': names must begin "
                    "with a lowercase letter", key);
       return FALSE;
     }

   for (i = 1; key[i]; i++)
     {
       if (key[i] != '-' &&
           !g_ascii_islower (key[i]) &&
           !g_ascii_isdigit (key[i]))
         {
           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                        "invalid name '%s': invalid character '%c'; "
                        "only lowercase letters, numbers and dash ('-') "
                        "are permitted.", key, key[i]);
           return FALSE;
         }

       if (key[i] == '-' && key[i + 1] == '-')
         {
           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                        "invalid name '%s': two successive dashes ('--') are "
                        "not permitted.", key);
           return FALSE;
         }
     }

   if (key[i - 1] == '-')
     {
       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                    "invalid name '%s': the last character may not be a "
                    "dash ('-').", key);
       return FALSE;
     }

   if (i > 32)
     {
       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                    "invalid name '%s': maximum length is 32", key);
       return FALSE;
     }

   return TRUE;
 }

 static void
 start_element (GMarkupParseContext  *context,
                const gchar          *element_name,
                const gchar         **attribute_names,
                const gchar         **attribute_values,
                gpointer              user_data,
                GError              **error)
 {
   ParseState *state = user_data;
   const GSList *element_stack;
   const gchar *container;

   element_stack = g_markup_parse_context_get_element_stack (context);
   container = element_stack->next ? element_stack->next->data : NULL;

 #define COLLECT(first, ...) \
   g_markup_collect_attributes (element_name,                                 \
                                attribute_names, attribute_values, error,     \
                                first, __VA_ARGS__, G_MARKUP_COLLECT_INVALID)
 #define OPTIONAL   G_MARKUP_COLLECT_OPTIONAL
 #define STRDUP     G_MARKUP_COLLECT_STRDUP
 #define STRING     G_MARKUP_COLLECT_STRING
 #define NO_ARGS()  COLLECT (G_MARKUP_COLLECT_INVALID, NULL)

   if (container == NULL)
     {
       if (strcmp (element_name, "schemalist") == 0)
         {
           COLLECT (OPTIONAL | STRDUP,
                    "gettext-domain",
                    &state->schemalist_domain);
           return;
         }
     }
   else if (strcmp (container, "schemalist") == 0)
     {
       if (strcmp (element_name, "schema") == 0)
         {
           const gchar *id, *path;

           if (COLLECT (STRING, "id", &id,
                        OPTIONAL | STRING, "path", &path,
                        OPTIONAL | STRDUP, "gettext-domain",
                                           &state->schema_domain))
             {
               if (!g_hash_table_lookup (state->schemas, id))
                 {
                   state->schema = gvdb_hash_table_new (state->schemas, id);
                   state->schema_root = gvdb_hash_table_insert (state->schema, "");

                   if (path != NULL)
                     gvdb_hash_table_insert_string (state->schema,
                                                    ".path", path);
                 }
               else
                 g_set_error (error, G_MARKUP_ERROR,
                              G_MARKUP_ERROR_INVALID_CONTENT,
                              "<schema id='%s'> already specified", id);
             }
           return;
         }
     }
   else if (strcmp (container, "schema") == 0)
     {
       if (strcmp (element_name, "key") == 0)
         {
           const gchar *name, *type;

           if (COLLECT (STRING, "name", &name, STRING, "type", &type))
             {
               if (!is_valid_keyname (name, error))
                 return;

               if (!g_hash_table_lookup (state->schema, name))
                 {
                   state->key = gvdb_hash_table_insert (state->schema, name);
                   gvdb_item_set_parent (state->key, state->schema_root);
                 }
               else
                 {
                   g_set_error (error, G_MARKUP_ERROR,
                                G_MARKUP_ERROR_INVALID_CONTENT,
                                "<key name='%s'> already specified", name);
                   return;
                 }

               if (g_variant_type_string_is_valid (type))
                 state->type = g_variant_type_new (type);
               else
                 {
                   g_set_error (error, G_MARKUP_ERROR,
                                G_MARKUP_ERROR_INVALID_CONTENT,
                                "invalid GVariant type string '%s'", type);
                   return;
                 }

               g_variant_builder_init (&state->key_options,
                                       G_VARIANT_TYPE ("a{sv}"));
             }

           return;
         }
       else if (strcmp (element_name, "child") == 0)
         {
           const gchar *name, *schema;

           if (COLLECT (STRING, "name", &name, STRING, "schema", &schema))
             {
               gchar *childname;

               if (!is_valid_keyname (name, error))
                 return;

               childname = g_strconcat (name, "/", NULL);

               if (!g_hash_table_lookup (state->schema, childname))
                 gvdb_hash_table_insert_string (state->schema, childname, schema);
               else
                 g_set_error (error, G_MARKUP_ERROR,
                              G_MARKUP_ERROR_INVALID_CONTENT,
                              "<child name='%s'> already specified", name);

               g_free (childname);
               return;
             }
         }
     }
   else if (strcmp (container, "key") == 0)
     {
       if (strcmp (element_name, "default") == 0)
         {
           const gchar *l10n;

           if (COLLECT (STRING | OPTIONAL, "l10n", &l10n,
                        STRDUP | OPTIONAL, "context", &state->context))
             {
               if (l10n != NULL)
                 {
                   if (!g_hash_table_lookup (state->schema, ".gettext-domain"))
                     {
                       const gchar *domain = state->schema_domain ?
                                             state->schema_domain :
                                             state->schemalist_domain;

                       if (domain == NULL)
                         {
                           g_set_error_literal (error, G_MARKUP_ERROR,
                                                G_MARKUP_ERROR_INVALID_CONTENT,
                                                "l10n requested, but no "
                                                "gettext domain given");
                           return;
                         }

                       gvdb_hash_table_insert_string (state->schema,
                                                      ".gettext-domain",
                                                      domain);

                       if (strcmp (l10n, "messages") == 0)
                         state->l10n = 'm';
                       else if (strcmp (l10n, "time") == 0)
                         state->l10n = 't';
                       else
                         {
                           g_set_error (error, G_MARKUP_ERROR,
                                        G_MARKUP_ERROR_INVALID_CONTENT,
                                        "unsupported l10n category: %s", l10n);
                           return;
                         }
                     }
                 }
               else
                 {
                   state->l10n = '\0';

                   if (state->context != NULL)
                     {
                       g_set_error_literal (error, G_MARKUP_ERROR,
                                            G_MARKUP_ERROR_INVALID_CONTENT,
                                            "translation context given for "
                                            " value without l10n enabled");
                       return;
                     }
                 }

               state->string = g_string_new (NULL);
             }

           return;
         }
       else if (strcmp (element_name, "summary") == 0 ||
                strcmp (element_name, "description") == 0)
         {
           state->string = g_string_new (NULL);
           NO_ARGS ();
           return;
         }
       else if (strcmp (element_name, "range") == 0)
         {
           NO_ARGS ();
           return;
         }
     }
   else if (strcmp (container, "range") == 0)
     {
       if (strcmp (element_name, "choice") == 0)
         {
           gchar *value;

           if (COLLECT (STRDUP, "value", &value))
             {
             }

           return;
         }
       else if (strcmp (element_name, "min") == 0)
         {
           NO_ARGS ();
           return;
         }
       else if (strcmp (element_name, "max") == 0)
         {
           NO_ARGS ();
           return;
         }
     }
   else if (strcmp (container, "choice") == 0)
     {
     }

   if (container)
     g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
                  "Element <%s> not allowed inside <%s>\n",
                  element_name, container);
   else
     g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
                  "Element <%s> not allowed at toplevel\n", element_name);
 }

 static void
 end_element (GMarkupParseContext  *context,
              const gchar          *element_name,
              gpointer              user_data,
              GError              **error)
 {
   ParseState *state = user_data;

   if (strcmp (element_name, "default") == 0)
     {
       state->value = g_variant_parse (state->type, state->string->str,
                                       NULL, NULL, error);

       if (state->l10n)
         {
           if (state->context)
             {
               gint len;

               /* Contextified messages are supported by prepending the
                * context, followed by '\004' to the start of the message
                * string.  We do that here to save GSettings the work
                * later on.
                *
                * Note: we are about to g_free() the context anyway...
                */
               len = strlen (state->context);
               state->context[len] = '\004';
               g_string_prepend_len (state->string, state->context, len + 1);
             }

           g_variant_builder_add (&state->key_options, "{sv}", "l10n",
                                  g_variant_new ("(ys)",
                                                 state->l10n,
                                                 state->string->str));
         }

       g_string_free (state->string, TRUE);
       g_free (state->context);
     }

   else if (strcmp (element_name, "key") == 0)
     {
       if (state->value == NULL)
         {
           g_set_error_literal (error,
                                G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                                "element <default> is required in <key>\n");
           return;
         }

       gvdb_item_set_value (state->key, state->value);
       gvdb_item_set_options (state->key,
                              g_variant_builder_end (&state->key_options));
     }

   else if (strcmp (element_name, "summary") == 0 ||
            strcmp (element_name, "description") == 0)
     g_string_free (state->string, TRUE);
 }

 static void
 text (GMarkupParseContext  *context,
       const gchar          *text,
       gsize                 text_len,
       gpointer              user_data,
       GError              **error)
 {
   ParseState *state = user_data;
   gsize i;

   for (i = 0; i < text_len; i++)
     if (!g_ascii_isspace (text[i]))
       {
         if (state->string)
           g_string_append_len (state->string, text, text_len);

         else
           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
                        "text may not appear inside <%s>\n",
                        g_markup_parse_context_get_element (context));

         break;
       }
 }

 static GHashTable *
 parse_gschema_files (gchar    **files,
                      gboolean   byteswap,
                      GError   **error)
 {
   GMarkupParser parser = { start_element, end_element, text };
   GMarkupParseContext *context;
   ParseState state = { byteswap, };
   const gchar *filename;

   context = g_markup_parse_context_new (&parser,
                                         G_MARKUP_PREFIX_ERROR_POSITION,
                                         &state, NULL);
   state.schemas = gvdb_hash_table_new (NULL, NULL);

   while ((filename = *files++) != NULL)
     {
       gchar *contents;
       gsize size;

       if (!g_file_get_contents (filename, &contents, &size, error))
         return FALSE;

       if (!g_markup_parse_context_parse (context, contents, size, error))
         {
           g_prefix_error (error, "%s: ", filename);
           return FALSE;
         }

       if (!g_markup_parse_context_end_parse (context, error))
         {
           g_prefix_error (error, "%s: ", filename);
           return FALSE;
         }
     }

   return state.schemas;
 }

 int
 main (int argc, char **argv)
 {
   gboolean byteswap = G_BYTE_ORDER != G_LITTLE_ENDIAN;
   GError *error = NULL;
   GHashTable *table;
   GDir *dir;
   const gchar *file;
   GPtrArray *files;
   gchar *srcdir;
   gchar *targetdir = NULL;
   gchar *target;
   GOptionContext *context;
   GOptionEntry entries[] = {
     { "targetdir", 0, 0, G_OPTION_ARG_FILENAME, &targetdir, "where to store the gschemas.compiled file", "DIRECTORY" },
     { NULL }
   };

   context = g_option_context_new ("DIRECTORY");

   g_option_context_set_summary (context,
     "Compile all GSettings schema files into a schema cache.\n"
     "Schema files are required to have the extension .gschema.xml,\n"
     "and the cache file is called gschemas.compiled.");

   g_option_context_add_main_entries (context, entries, NULL);

   if (!g_option_context_parse (context, &argc, &argv, &error))
     {
       fprintf (stderr, "%s", error->message);
       return 1;
     }

   if (argc != 2)
     {
       fprintf (stderr, "you should give exactly one directory name\n");
       return 1;
     }

   srcdir = argv[1];
   if (targetdir)
     target = g_build_filename (targetdir, "gschemas.compiled", NULL);
   else
     target = "gschemas.compiled";

   dir = g_dir_open (srcdir, 0, &error);
   if (dir == NULL)
     {
       fprintf (stderr, "%s\n", error->message);
       return 1;
     }

   files = g_ptr_array_new ();
   while ((file = g_dir_read_name (dir)) != NULL)
     {
       if (g_str_has_suffix (file, ".gschema.xml"))
 	{
 	  g_ptr_array_add (files, g_build_filename (srcdir, file, NULL));
 	}
     }

   if (files->len == 0)
     {
       fprintf (stderr, "no schema files found\n");
       return 1;
     }

   g_ptr_array_add (files, NULL);

   if (!(table = parse_gschema_files ((gchar **) files->pdata, byteswap, &error)) ||
       !gvdb_table_write_contents (table, target, byteswap, &error))
     {
       fprintf (stderr, "%s\n", error->message);
       return 1;
     }

   return 0;
 }
	/*
	* 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 <string.h>
	#include <unistd.h>
	#include <stdio.h>

	#include "gvdb/gvdb-builder.h"

	typedef struct
	{
	gboolean byteswap;

	GVariantBuilder key_options;
	GHashTable *schemas;
	gchar *schemalist_domain;

	GHashTable *schema;
	GvdbItem *schema_root;
	gchar *schema_domain;

	GString *string;

	GvdbItem *key;
	GVariant *value;
	GVariant min, max;
	GVariant *strings;
	gchar l10n;
	gchar *context;
	GVariantType *type;
	} ParseState;

	static gboolean
	is_valid_keyname (const gchar *key,
	GError **error)
	{
	gint i;

	if (key[0] == '\0')
	{
	g_set_error_literal (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"empty names are not permitted");
	return FALSE;
	}

	if (!g_ascii_islower (key[0]))
	{
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"invalid name '%s': names must begin "
	"with a lowercase letter", key);
	return FALSE;
	}

	for (i = 1; key[i]; i++)
	{
	if (key[i] != '-' &&
	!g_ascii_islower (key[i]) &&
	!g_ascii_isdigit (key[i]))
	{
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"invalid name '%s': invalid character '%c'; "
	"only lowercase letters, numbers and dash ('-') "
	"are permitted.", key, key[i]);
	return FALSE;
	}

	if (key[i] == '-' && key[i + 1] == '-')
	{
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"invalid name '%s': two successive dashes ('--') are "
	"not permitted.", key);
	return FALSE;
	}
	}

	if (key[i - 1] == '-')
	{
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"invalid name '%s': the last character may not be a "
	"dash ('-').", key);
	return FALSE;
	}

	if (i > 32)
	{
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"invalid name '%s': maximum length is 32", key);
	return FALSE;
	}

	return TRUE;
	}

	static void
	start_element (GMarkupParseContext *context,
	const gchar *element_name,
	const gchar **attribute_names,
	const gchar **attribute_values,
	gpointer user_data,
	GError **error)
	{
	ParseState *state = user_data;
	const GSList *element_stack;
	const gchar *container;

	element_stack = g_markup_parse_context_get_element_stack (context);
	container = element_stack->next ? element_stack->next->data : NULL;

	#define COLLECT(first, ...) \
	g_markup_collect_attributes (element_name, \
	attribute_names, attribute_values, error, \
	first, __VA_ARGS__, G_MARKUP_COLLECT_INVALID)
	#define OPTIONAL G_MARKUP_COLLECT_OPTIONAL
	#define STRDUP G_MARKUP_COLLECT_STRDUP
	#define STRING G_MARKUP_COLLECT_STRING
	#define NO_ARGS() COLLECT (G_MARKUP_COLLECT_INVALID, NULL)

	if (container == NULL)
	{
	if (strcmp (element_name, "schemalist") == 0)
	{
	COLLECT (OPTIONAL \| STRDUP,
	"gettext-domain",
	&state->schemalist_domain);
	return;
	}
	}
	else if (strcmp (container, "schemalist") == 0)
	{
	if (strcmp (element_name, "schema") == 0)
	{
	const gchar id, path;

	if (COLLECT (STRING, "id", &id,
	OPTIONAL \| STRING, "path", &path,
	OPTIONAL \| STRDUP, "gettext-domain",
	&state->schema_domain))
	{
	if (!g_hash_table_lookup (state->schemas, id))
	{
	state->schema = gvdb_hash_table_new (state->schemas, id);
	state->schema_root = gvdb_hash_table_insert (state->schema, "");

	if (path != NULL)
	gvdb_hash_table_insert_string (state->schema,
	".path", path);
	}
	else
	g_set_error (error, G_MARKUP_ERROR,
	G_MARKUP_ERROR_INVALID_CONTENT,
	"<schema id='%s'> already specified", id);
	}
	return;
	}
	}
	else if (strcmp (container, "schema") == 0)
	{
	if (strcmp (element_name, "key") == 0)
	{
	const gchar name, type;

	if (COLLECT (STRING, "name", &name, STRING, "type", &type))
	{
	if (!is_valid_keyname (name, error))
	return;

	if (!g_hash_table_lookup (state->schema, name))
	{
	state->key = gvdb_hash_table_insert (state->schema, name);
	gvdb_item_set_parent (state->key, state->schema_root);
	}
	else
	{
	g_set_error (error, G_MARKUP_ERROR,
	G_MARKUP_ERROR_INVALID_CONTENT,
	"<key name='%s'> already specified", name);
	return;
	}

	if (g_variant_type_string_is_valid (type))
	state->type = g_variant_type_new (type);
	else
	{
	g_set_error (error, G_MARKUP_ERROR,
	G_MARKUP_ERROR_INVALID_CONTENT,
	"invalid GVariant type string '%s'", type);
	return;
	}

	g_variant_builder_init (&state->key_options,
	G_VARIANT_TYPE ("a{sv}"));
	}

	return;
	}
	else if (strcmp (element_name, "child") == 0)
	{
	const gchar name, schema;

	if (COLLECT (STRING, "name", &name, STRING, "schema", &schema))
	{
	gchar *childname;

	if (!is_valid_keyname (name, error))
	return;

	childname = g_strconcat (name, "/", NULL);

	if (!g_hash_table_lookup (state->schema, childname))
	gvdb_hash_table_insert_string (state->schema, childname, schema);
	else
	g_set_error (error, G_MARKUP_ERROR,
	G_MARKUP_ERROR_INVALID_CONTENT,
	"<child name='%s'> already specified", name);

	g_free (childname);
	return;
	}
	}
	}
	else if (strcmp (container, "key") == 0)
	{
	if (strcmp (element_name, "default") == 0)
	{
	const gchar *l10n;

	if (COLLECT (STRING \| OPTIONAL, "l10n", &l10n,
	STRDUP \| OPTIONAL, "context", &state->context))
	{
	if (l10n != NULL)
	{
	if (!g_hash_table_lookup (state->schema, ".gettext-domain"))
	{
	const gchar *domain = state->schema_domain ?
	state->schema_domain :
	state->schemalist_domain;

	if (domain == NULL)
	{
	g_set_error_literal (error, G_MARKUP_ERROR,
	G_MARKUP_ERROR_INVALID_CONTENT,
	"l10n requested, but no "
	"gettext domain given");
	return;
	}

	gvdb_hash_table_insert_string (state->schema,
	".gettext-domain",
	domain);

	if (strcmp (l10n, "messages") == 0)
	state->l10n = 'm';
	else if (strcmp (l10n, "time") == 0)
	state->l10n = 't';
	else
	{
	g_set_error (error, G_MARKUP_ERROR,
	G_MARKUP_ERROR_INVALID_CONTENT,
	"unsupported l10n category: %s", l10n);
	return;
	}
	}
	}
	else
	{
	state->l10n = '\0';

	if (state->context != NULL)
	{
	g_set_error_literal (error, G_MARKUP_ERROR,
	G_MARKUP_ERROR_INVALID_CONTENT,
	"translation context given for "
	" value without l10n enabled");
	return;
	}
	}

	state->string = g_string_new (NULL);
	}

	return;
	}
	else if (strcmp (element_name, "summary") == 0 \|\|
	strcmp (element_name, "description") == 0)
	{
	state->string = g_string_new (NULL);
	NO_ARGS ();
	return;
	}
	else if (strcmp (element_name, "range") == 0)
	{
	NO_ARGS ();
	return;
	}
	}
	else if (strcmp (container, "range") == 0)
	{
	if (strcmp (element_name, "choice") == 0)
	{
	gchar *value;

	if (COLLECT (STRDUP, "value", &value))
	{
	}

	return;
	}
	else if (strcmp (element_name, "min") == 0)
	{
	NO_ARGS ();
	return;
	}
	else if (strcmp (element_name, "max") == 0)
	{
	NO_ARGS ();
	return;
	}
	}
	else if (strcmp (container, "choice") == 0)
	{
	}

	if (container)
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
	"Element <%s> not allowed inside <%s>\n",
	element_name, container);
	else
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
	"Element <%s> not allowed at toplevel\n", element_name);
	}

	static void
	end_element (GMarkupParseContext *context,
	const gchar *element_name,
	gpointer user_data,
	GError **error)
	{
	ParseState *state = user_data;

	if (strcmp (element_name, "default") == 0)
	{
	state->value = g_variant_parse (state->type, state->string->str,
	NULL, NULL, error);

	if (state->l10n)
	{
	if (state->context)
	{
	gint len;

	/* Contextified messages are supported by prepending the
	* context, followed by '\004' to the start of the message
	* string. We do that here to save GSettings the work
	* later on.
	*
	* Note: we are about to g_free() the context anyway...
	*/
	len = strlen (state->context);
	state->context[len] = '\004';
	g_string_prepend_len (state->string, state->context, len + 1);
	}

	g_variant_builder_add (&state->key_options, "{sv}", "l10n",
	g_variant_new ("(ys)",
	state->l10n,
	state->string->str));
	}

	g_string_free (state->string, TRUE);
	g_free (state->context);
	}

	else if (strcmp (element_name, "key") == 0)
	{
	if (state->value == NULL)
	{
	g_set_error_literal (error,
	G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"element <default> is required in <key>\n");
	return;
	}

	gvdb_item_set_value (state->key, state->value);
	gvdb_item_set_options (state->key,
	g_variant_builder_end (&state->key_options));
	}

	else if (strcmp (element_name, "summary") == 0 \|\|
	strcmp (element_name, "description") == 0)
	g_string_free (state->string, TRUE);
	}

	static void
	text (GMarkupParseContext *context,
	const gchar *text,
	gsize text_len,
	gpointer user_data,
	GError **error)
	{
	ParseState *state = user_data;
	gsize i;

	for (i = 0; i < text_len; i++)
	if (!g_ascii_isspace (text[i]))
	{
	if (state->string)
	g_string_append_len (state->string, text, text_len);

	else
	g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
	"text may not appear inside <%s>\n",
	g_markup_parse_context_get_element (context));

	break;
	}
	}

	static GHashTable *
	parse_gschema_files (gchar **files,
	gboolean byteswap,
	GError **error)
	{
	GMarkupParser parser = { start_element, end_element, text };
	GMarkupParseContext *context;
	ParseState state = { byteswap, };
	const gchar *filename;

	context = g_markup_parse_context_new (&parser,
	G_MARKUP_PREFIX_ERROR_POSITION,
	&state, NULL);
	state.schemas = gvdb_hash_table_new (NULL, NULL);

	while ((filename = *files++) != NULL)
	{
	gchar *contents;
	gsize size;

	if (!g_file_get_contents (filename, &contents, &size, error))
	return FALSE;

	if (!g_markup_parse_context_parse (context, contents, size, error))
	{
	g_prefix_error (error, "%s: ", filename);
	return FALSE;
	}

	if (!g_markup_parse_context_end_parse (context, error))
	{
	g_prefix_error (error, "%s: ", filename);
	return FALSE;
	}
	}

	return state.schemas;
	}

	int
	main (int argc, char **argv)
	{
	gboolean byteswap = G_BYTE_ORDER != G_LITTLE_ENDIAN;
	GError *error = NULL;
	GHashTable *table;
	GDir *dir;
	const gchar *file;
	GPtrArray *files;
	gchar *srcdir;
	gchar *targetdir = NULL;
	gchar *target;
	GOptionContext *context;
	GOptionEntry entries[] = {
	{ "targetdir", 0, 0, G_OPTION_ARG_FILENAME, &targetdir, "where to store the gschemas.compiled file", "DIRECTORY" },
	{ NULL }
	};

	context = g_option_context_new ("DIRECTORY");

	g_option_context_set_summary (context,
	"Compile all GSettings schema files into a schema cache.\n"
	"Schema files are required to have the extension .gschema.xml,\n"
	"and the cache file is called gschemas.compiled.");

	g_option_context_add_main_entries (context, entries, NULL);

	if (!g_option_context_parse (context, &argc, &argv, &error))
	{
	fprintf (stderr, "%s", error->message);
	return 1;
	}

	if (argc != 2)
	{
	fprintf (stderr, "you should give exactly one directory name\n");
	return 1;
	}

	srcdir = argv[1];
	if (targetdir)
	target = g_build_filename (targetdir, "gschemas.compiled", NULL);
	else
	target = "gschemas.compiled";

	dir = g_dir_open (srcdir, 0, &error);
	if (dir == NULL)
	{
	fprintf (stderr, "%s\n", error->message);
	return 1;
	}

	files = g_ptr_array_new ();
	while ((file = g_dir_read_name (dir)) != NULL)
	{
	if (g_str_has_suffix (file, ".gschema.xml"))
	{
	g_ptr_array_add (files, g_build_filename (srcdir, file, NULL));
	}
	}

	if (files->len == 0)
	{
	fprintf (stderr, "no schema files found\n");
	return 1;
	}

	g_ptr_array_add (files, NULL);

	if (!(table = parse_gschema_files ((gchar **) files->pdata, byteswap, &error)) \|\|
	!gvdb_table_write_contents (table, target, byteswap, &error))
	{
	fprintf (stderr, "%s\n", error->message);
	return 1;
	}

	return 0;
	}