gio/glib-compile-schemas.c

   1 /*
   2  * Copyright © 2010 Codethink Limited
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the licence, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  *
  19  * Author: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 /* Prologue {{{1 */
  23 #include "config.h"
  24
  25 #include <gstdio.h>
  26 #include <gi18n.h>
  27
  28 #include <string.h>
  29 #include <stdio.h>
  30 #include <locale.h>
  31
  32 #ifdef HAVE_UNISTD_H
  33 #include <unistd.h>
  34 #endif
  35
  36 #include "gvdb/gvdb-builder.h"
  37 #include "strinfo.c"
  38
  39 /* Handling of <enum> {{{1 */
  40 typedef struct
  41 {
  42   GString *strinfo;
  43
  44   gboolean is_flags;
  45 } EnumState;
  46
  47 static void
  48 enum_state_free (gpointer data)
  49 {
  50   EnumState *state = data;
  51
  52   g_string_free (state->strinfo, TRUE);
  53   g_slice_free (EnumState, state);
  54 }
  55
  56 EnumState *
  57 enum_state_new (gboolean is_flags)
  58 {
  59   EnumState *state;
  60
  61   state = g_slice_new (EnumState);
  62   state->strinfo = g_string_new (NULL);
  63   state->is_flags = is_flags;
  64
  65   return state;
  66 }
  67
  68 static void
  69 enum_state_add_value (EnumState    *state,
  70                       const gchar  *nick,
  71                       const gchar  *valuestr,
  72                       GError      **error)
  73 {
  74   gint64 value;
  75   gchar *end;
  76
  77   if (nick[0] == '\0' || nick[1] == '\0')
  78     {
  79       g_set_error (error, G_MARKUP_ERROR,
  80                    G_MARKUP_ERROR_INVALID_CONTENT,
  81                    "nick must be a minimum of 2 characters");
  82       return;
  83     }
  84
  85   value = g_ascii_strtoll (valuestr, &end, 0);
  86   if (*end || state->is_flags ?
  87                 (value > G_MAXUINT32 || value < 0) :
  88                 (value > G_MAXINT32 || value < G_MININT32))
  89     {
  90       g_set_error (error, G_MARKUP_ERROR,
  91                    G_MARKUP_ERROR_INVALID_CONTENT,
  92                    "invalid numeric value");
  93       return;
  94     }
  95
  96   if (strinfo_builder_contains (state->strinfo, nick))
  97     {
  98       g_set_error (error, G_MARKUP_ERROR,
  99                    G_MARKUP_ERROR_INVALID_CONTENT,
 100                    "<value nick='%s'/> already specified", nick);
 101       return;
 102     }
 103
 104   if (strinfo_builder_contains_value (state->strinfo, value))
 105     {
 106       g_set_error (error, G_MARKUP_ERROR,
 107                    G_MARKUP_ERROR_INVALID_CONTENT,
 108                    "value='%s' already specified", valuestr);
 109       return;
 110     }
 111
 112   /* Silently drop the null case if it is mentioned.
 113    * It is properly denoted with an empty array.
 114    */
 115   if (state->is_flags && value == 0)
 116     return;
 117
 118   if (state->is_flags && (value & (value - 1)))
 119     {
 120       g_set_error (error, G_MARKUP_ERROR,
 121                    G_MARKUP_ERROR_INVALID_CONTENT,
 122                    "flags values must have at most 1 bit set");
 123       return;
 124     }
 125
 126   /* Since we reject exact duplicates of value='' and we only allow one
 127    * bit to be set, it's not possible to have overlaps.
 128    *
 129    * If we loosen the one-bit-set restriction we need an overlap check.
 130    */
 131
 132   strinfo_builder_append_item (state->strinfo, nick, value);
 133 }
 134
 135 static void
 136 enum_state_end (EnumState **state_ptr,
 137                 GError    **error)
 138 {
 139   EnumState *state;
 140
 141   state = *state_ptr;
 142   *state_ptr = NULL;
 143
 144   if (state->strinfo->len == 0)
 145     g_set_error (error,
 146                  G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 147                  "<%s> must contain at least one <value>",
 148                  state->is_flags ? "flags" : "enum");
 149 }
 150
 151 /* Handling of <key> {{{1 */
 152 typedef struct
 153 {
 154   /* for <child>, @child_schema will be set.
 155    * for <key>, everything else will be set.
 156    */
 157   gchar        *child_schema;
 158
 159
 160   GVariantType *type;
 161   gboolean      have_gettext_domain;
 162
 163   gchar         l10n;
 164   gchar        *l10n_context;
 165   GString      *unparsed_default_value;
 166   GVariant     *default_value;
 167
 168   GString      *strinfo;
 169   gboolean      is_enum;
 170   gboolean      is_flags;
 171
 172   GVariant     *minimum;
 173   GVariant     *maximum;
 174
 175   gboolean      has_choices;
 176   gboolean      has_aliases;
 177   gboolean      is_override;
 178
 179   gboolean      checked;
 180   GVariant     *serialised;
 181 } KeyState;
 182
 183 static KeyState *
 184 key_state_new (const gchar *type_string,
 185                const gchar *gettext_domain,
 186                gboolean     is_enum,
 187                gboolean     is_flags,
 188                GString     *strinfo)
 189 {
 190   KeyState *state;
 191
 192   state = g_slice_new0 (KeyState);
 193   state->type = g_variant_type_new (type_string);
 194   state->have_gettext_domain = gettext_domain != NULL;
 195   state->is_enum = is_enum;
 196   state->is_flags = is_flags;
 197
 198   if (strinfo)
 199     state->strinfo = g_string_new_len (strinfo->str, strinfo->len);
 200   else
 201     state->strinfo = g_string_new (NULL);
 202
 203   return state;
 204 }
 205
 206 static KeyState *
 207 key_state_override (KeyState    *state,
 208                     const gchar *gettext_domain)
 209 {
 210   KeyState *copy;
 211
 212   copy = g_slice_new0 (KeyState);
 213   copy->type = g_variant_type_copy (state->type);
 214   copy->have_gettext_domain = gettext_domain != NULL;
 215   copy->strinfo = g_string_new_len (state->strinfo->str,
 216                                     state->strinfo->len);
 217   copy->is_enum = state->is_enum;
 218   copy->is_flags = state->is_flags;
 219   copy->is_override = TRUE;
 220
 221   if (state->minimum)
 222     {
 223       copy->minimum = g_variant_ref (state->minimum);
 224       copy->maximum = g_variant_ref (state->maximum);
 225     }
 226
 227   return copy;
 228 }
 229
 230 static KeyState *
 231 key_state_new_child (const gchar *child_schema)
 232 {
 233   KeyState *state;
 234
 235   state = g_slice_new0 (KeyState);
 236   state->child_schema = g_strdup (child_schema);
 237
 238   return state;
 239 }
 240
 241 static gboolean
 242 is_valid_choices (GVariant *variant,
 243                   GString  *strinfo)
 244 {
 245   switch (g_variant_classify (variant))
 246     {
 247       case G_VARIANT_CLASS_MAYBE:
 248       case G_VARIANT_CLASS_ARRAY:
 249         {
 250           gboolean valid = TRUE;
 251           GVariantIter iter;
 252
 253           g_variant_iter_init (&iter, variant);
 254
 255           while (valid && (variant = g_variant_iter_next_value (&iter)))
 256             {
 257               valid = is_valid_choices (variant, strinfo);
 258               g_variant_unref (variant);
 259             }
 260
 261           return valid;
 262         }
 263
 264       case G_VARIANT_CLASS_STRING:
 265         return strinfo_is_string_valid ((const guint32 *) strinfo->str,
 266                                         strinfo->len / 4,
 267                                         g_variant_get_string (variant, NULL));
 268
 269       default:
 270         g_assert_not_reached ();
 271     }
 272 }
 273
 274
 275 /* Gets called at </default> </choices> or <range/> to check for
 276  * validity of the default value so that any inconsistency is
 277  * reported as soon as it is encountered.
 278  */
 279 static void
 280 key_state_check_range (KeyState  *state,
 281                        GError   **error)
 282 {
 283   if (state->default_value)
 284     {
 285       const gchar *tag;
 286
 287       tag = state->is_override ? "override" : "default";
 288
 289       if (state->minimum)
 290         {
 291           if (g_variant_compare (state->default_value, state->minimum) < 0 ||
 292               g_variant_compare (state->default_value, state->maximum) > 0)
 293             {
 294               g_set_error (error, G_MARKUP_ERROR,
 295                            G_MARKUP_ERROR_INVALID_CONTENT,
 296                            "<%s> is not contained in "
 297                            "the specified range", tag);
 298             }
 299         }
 300
 301       else if (state->strinfo->len)
 302         {
 303           if (!is_valid_choices (state->default_value, state->strinfo))
 304             {
 305               if (state->is_enum)
 306                 g_set_error (error, G_MARKUP_ERROR,
 307                              G_MARKUP_ERROR_INVALID_CONTENT,
 308                              "<%s> is not a valid member of "
 309                              "the specified enumerated type", tag);
 310
 311               else if (state->is_flags)
 312                 g_set_error (error, G_MARKUP_ERROR,
 313                              G_MARKUP_ERROR_INVALID_CONTENT,
 314                              "<%s> contains string not in the "
 315                              "specified flags type", tag);
 316
 317               else
 318                 g_set_error (error, G_MARKUP_ERROR,
 319                              G_MARKUP_ERROR_INVALID_CONTENT,
 320                              "<%s> contains string not in "
 321                              "<choices>", tag);
 322             }
 323         }
 324     }
 325 }
 326
 327 static void
 328 key_state_set_range (KeyState     *state,
 329                      const gchar  *min_str,
 330                      const gchar  *max_str,
 331                      GError      **error)
 332 {
 333   const struct {
 334     const gchar  type;
 335     const gchar *min;
 336     const gchar *max;
 337   } table[] = {
 338     { 'y',                    "0",                  "255" },
 339     { 'n',               "-32768",                "32767" },
 340     { 'q',                    "0",                "65535" },
 341     { 'i',          "-2147483648",           "2147483647" },
 342     { 'u',                    "0",           "4294967295" },
 343     { 'x', "-9223372036854775808",  "9223372036854775807" },
 344     { 't',                    "0", "18446744073709551615" },
 345     { 'd',                 "-inf",                  "inf" },
 346   };
 347   gboolean type_ok = FALSE;
 348   gint i;
 349
 350   if (state->minimum)
 351     {
 352       g_set_error_literal (error, G_MARKUP_ERROR,
 353                            G_MARKUP_ERROR_INVALID_CONTENT,
 354                            "<range/> already specified for this key");
 355       return;
 356     }
 357
 358   for (i = 0; i < G_N_ELEMENTS (table); i++)
 359     if (*(char *) state->type == table[i].type)
 360       {
 361         min_str = min_str ? min_str : table[i].min;
 362         max_str = max_str ? max_str : table[i].max;
 363         type_ok = TRUE;
 364         break;
 365       }
 366
 367   if (!type_ok)
 368     {
 369       gchar *type = g_variant_type_dup_string (state->type);
 370       g_set_error (error, G_MARKUP_ERROR,
 371                   G_MARKUP_ERROR_INVALID_CONTENT,
 372                   "<range> not allowed for keys of type '%s'", type);
 373       g_free (type);
 374       return;
 375     }
 376
 377   state->minimum = g_variant_parse (state->type, min_str, NULL, NULL, error);
 378   if (state->minimum == NULL)
 379     return;
 380
 381   state->maximum = g_variant_parse (state->type, max_str, NULL, NULL, error);
 382   if (state->maximum == NULL)
 383     return;
 384
 385   if (g_variant_compare (state->minimum, state->maximum) > 0)
 386     {
 387       g_set_error (error, G_MARKUP_ERROR,
 388                    G_MARKUP_ERROR_INVALID_CONTENT,
 389                    "<range> specified minimum is greater than maxmimum");
 390       return;
 391     }
 392
 393   key_state_check_range (state, error);
 394 }
 395
 396 static GString *
 397 key_state_start_default (KeyState     *state,
 398                          const gchar  *l10n,
 399                          const gchar  *context,
 400                          GError      **error)
 401 {
 402   if (l10n != NULL)
 403     {
 404       if (strcmp (l10n, "messages") == 0)
 405         state->l10n = 'm';
 406
 407       else if (strcmp (l10n, "time") == 0)
 408         state->l10n = 't';
 409
 410       else
 411         {
 412           g_set_error (error, G_MARKUP_ERROR,
 413                        G_MARKUP_ERROR_INVALID_CONTENT,
 414                        "unsupported l10n category: %s", l10n);
 415           return NULL;
 416         }
 417
 418       if (!state->have_gettext_domain)
 419         {
 420           g_set_error_literal (error, G_MARKUP_ERROR,
 421                                G_MARKUP_ERROR_INVALID_CONTENT,
 422                                "l10n requested, but no "
 423                                "gettext domain given");
 424           return NULL;
 425         }
 426
 427       state->l10n_context = g_strdup (context);
 428     }
 429
 430   else if (context != NULL)
 431     {
 432       g_set_error_literal (error, G_MARKUP_ERROR,
 433                            G_MARKUP_ERROR_INVALID_CONTENT,
 434                            "translation context given for "
 435                            " value without l10n enabled");
 436       return NULL;
 437     }
 438
 439   return g_string_new (NULL);
 440 }
 441
 442 static void
 443 key_state_end_default (KeyState  *state,
 444                        GString  **string,
 445                        GError   **error)
 446 {
 447   state->unparsed_default_value = *string;
 448   *string = NULL;
 449
 450   state->default_value = g_variant_parse (state->type,
 451                                           state->unparsed_default_value->str,
 452                                           NULL, NULL, error);
 453   key_state_check_range (state, error);
 454 }
 455
 456 static void
 457 key_state_start_choices (KeyState  *state,
 458                          GError   **error)
 459 {
 460   const GVariantType *type = state->type;
 461
 462   if (state->is_enum)
 463     {
 464       g_set_error_literal (error, G_MARKUP_ERROR,
 465                            G_MARKUP_ERROR_INVALID_CONTENT,
 466                            "<choices> can not be specified for keys "
 467                            "tagged as having an enumerated type");
 468       return;
 469     }
 470
 471   if (state->has_choices)
 472     {
 473       g_set_error_literal (error, G_MARKUP_ERROR,
 474                            G_MARKUP_ERROR_INVALID_CONTENT,
 475                            "<choices> already specified for this key");
 476       return;
 477     }
 478
 479   while (g_variant_type_is_maybe (type) || g_variant_type_is_array (type))
 480     type = g_variant_type_element (type);
 481
 482   if (!g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
 483     {
 484       gchar *type_string = g_variant_type_dup_string (state->type);
 485       g_set_error (error, G_MARKUP_ERROR,
 486                    G_MARKUP_ERROR_INVALID_CONTENT,
 487                    "<choices> not allowed for keys of type '%s'",
 488                    type_string);
 489       g_free (type_string);
 490       return;
 491     }
 492 }
 493
 494 static void
 495 key_state_add_choice (KeyState     *state,
 496                       const gchar  *choice,
 497                       GError      **error)
 498 {
 499   if (strinfo_builder_contains (state->strinfo, choice))
 500     {
 501       g_set_error (error, G_MARKUP_ERROR,
 502                    G_MARKUP_ERROR_INVALID_CONTENT,
 503                    "<choice value='%s'/> already given", choice);
 504       return;
 505     }
 506
 507   strinfo_builder_append_item (state->strinfo, choice, 0);
 508   state->has_choices = TRUE;
 509 }
 510
 511 static void
 512 key_state_end_choices (KeyState  *state,
 513                        GError   **error)
 514 {
 515   if (!state->has_choices)
 516     {
 517       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 518                    "<choices> must contain at least one <choice>");
 519       return;
 520     }
 521
 522   key_state_check_range (state, error);
 523 }
 524
 525 static void
 526 key_state_start_aliases (KeyState  *state,
 527                          GError   **error)
 528 {
 529   if (state->has_aliases)
 530     g_set_error_literal (error, G_MARKUP_ERROR,
 531                          G_MARKUP_ERROR_INVALID_CONTENT,
 532                          "<aliases> already specified for this key");
 533   else if (!state->is_flags && !state->is_enum && !state->has_choices)
 534     g_set_error_literal (error, G_MARKUP_ERROR,
 535                          G_MARKUP_ERROR_INVALID_CONTENT,
 536                          "<aliases> can only be specified for keys with "
 537                          "enumerated or flags types or after <choices>");
 538 }
 539
 540 static void
 541 key_state_add_alias (KeyState     *state,
 542                      const gchar  *alias,
 543                      const gchar  *target,
 544                      GError      **error)
 545 {
 546   if (strinfo_builder_contains (state->strinfo, alias))
 547     {
 548       if (strinfo_is_string_valid ((guint32 *) state->strinfo->str,
 549                                    state->strinfo->len / 4,
 550                                    alias))
 551         {
 552           if (state->is_enum)
 553             g_set_error (error, G_MARKUP_ERROR,
 554                          G_MARKUP_ERROR_INVALID_CONTENT,
 555                          "<alias value='%s'/> given when '%s' is already "
 556                          "a member of the enumerated type", alias, alias);
 557
 558           else
 559             g_set_error (error, G_MARKUP_ERROR,
 560                          G_MARKUP_ERROR_INVALID_CONTENT,
 561                          "<alias value='%s'/> given when "
 562                          "<choice value='%s'/> was already given",
 563                          alias, alias);
 564         }
 565
 566       else
 567         g_set_error (error, G_MARKUP_ERROR,
 568                      G_MARKUP_ERROR_INVALID_CONTENT,
 569                      "<alias value='%s'/> already specified", alias);
 570
 571       return;
 572     }
 573
 574   if (!strinfo_builder_append_alias (state->strinfo, alias, target))
 575     {
 576       g_set_error (error, G_MARKUP_ERROR,
 577                    G_MARKUP_ERROR_INVALID_CONTENT,
 578                    "alias target '%s' is not in %s", target,
 579                    state->is_enum ? "enumerated type" : "<choices>");
 580       return;
 581     }
 582
 583   state->has_aliases = TRUE;
 584 }
 585
 586 static void
 587 key_state_end_aliases (KeyState  *state,
 588                        GError   **error)
 589 {
 590   if (!state->has_aliases)
 591     {
 592       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 593                    "<aliases> must contain at least one <alias>");
 594       return;
 595     }
 596 }
 597
 598 static gboolean
 599 key_state_check (KeyState  *state,
 600                  GError   **error)
 601 {
 602   if (state->checked)
 603     return TRUE;
 604
 605   return state->checked = TRUE;
 606 }
 607
 608 static GVariant *
 609 key_state_serialise (KeyState *state)
 610 {
 611   if (state->serialised == NULL)
 612     {
 613       if (state->child_schema)
 614         {
 615           state->serialised = g_variant_new_string (state->child_schema);
 616         }
 617
 618       else
 619         {
 620           GVariantBuilder builder;
 621
 622           g_assert (key_state_check (state, NULL));
 623
 624           g_variant_builder_init (&builder, G_VARIANT_TYPE_TUPLE);
 625
 626           /* default value */
 627           g_variant_builder_add_value (&builder, state->default_value);
 628
 629           /* translation */
 630           if (state->l10n)
 631             {
 632               if (state->l10n_context)
 633                 {
 634                   gint len;
 635
 636                   /* Contextified messages are supported by prepending
 637                    * the context, followed by '\004' to the start of the
 638                    * message string.  We do that here to save GSettings
 639                    * the work later on.
 640                    */
 641                   len = strlen (state->l10n_context);
 642                   state->l10n_context[len] = '\004';
 643                   g_string_prepend_len (state->unparsed_default_value,
 644                                         state->l10n_context, len + 1);
 645                   g_free (state->l10n_context);
 646                   state->l10n_context = NULL;
 647                 }
 648
 649               g_variant_builder_add (&builder, "(y(y&s))", 'l', state->l10n,
 650                                      state->unparsed_default_value->str);
 651               g_string_free (state->unparsed_default_value, TRUE);
 652               state->unparsed_default_value = NULL;
 653             }
 654
 655           /* choice, aliases, enums */
 656           if (state->strinfo->len)
 657             {
 658               GVariant *array;
 659               guint32 *words;
 660               gpointer data;
 661               gsize size;
 662               gint i;
 663
 664               data = state->strinfo->str;
 665               size = state->strinfo->len;
 666
 667               words = data;
 668               for (i = 0; i < size / sizeof (guint32); i++)
 669                 words[i] = GUINT32_TO_LE (words[i]);
 670
 671               array = g_variant_new_from_data (G_VARIANT_TYPE ("au"),
 672                                                data, size, TRUE,
 673                                                g_free, data);
 674
 675               g_string_free (state->strinfo, FALSE);
 676               state->strinfo = NULL;
 677
 678               g_variant_builder_add (&builder, "(y@au)",
 679                                      state->is_flags ? 'f' :
 680                                      state->is_enum ? 'e' : 'c',
 681                                      array);
 682             }
 683
 684           /* range */
 685           if (state->minimum || state->maximum)
 686             g_variant_builder_add (&builder, "(y(**))", 'r',
 687                                    state->minimum, state->maximum);
 688
 689           state->serialised = g_variant_builder_end (&builder);
 690         }
 691
 692       g_variant_ref_sink (state->serialised);
 693     }
 694
 695   return g_variant_ref (state->serialised);
 696 }
 697
 698 static void
 699 key_state_free (gpointer data)
 700 {
 701   KeyState *state = data;
 702
 703   if (state->type)
 704     g_variant_type_free (state->type);
 705
 706   g_free (state->l10n_context);
 707
 708   if (state->unparsed_default_value)
 709     g_string_free (state->unparsed_default_value, TRUE);
 710
 711   if (state->default_value)
 712     g_variant_unref (state->default_value);
 713
 714   if (state->strinfo)
 715     g_string_free (state->strinfo, TRUE);
 716
 717   if (state->minimum)
 718     g_variant_unref (state->minimum);
 719
 720   if (state->maximum)
 721     g_variant_unref (state->maximum);
 722
 723   if (state->serialised)
 724     g_variant_unref (state->serialised);
 725
 726   g_slice_free (KeyState, state);
 727 }
 728
 729 /* Key name validity {{{1 */
 730 static gboolean allow_any_name = FALSE;
 731
 732 static gboolean
 733 is_valid_keyname (const gchar  *key,
 734                   GError      **error)
 735 {
 736   gint i;
 737
 738   if (key[0] == '\0')
 739     {
 740       g_set_error_literal (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 741                            _("empty names are not permitted"));
 742       return FALSE;
 743     }
 744
 745   if (allow_any_name)
 746     return TRUE;
 747
 748   if (!g_ascii_islower (key[0]))
 749     {
 750       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 751                    _("invalid name '%s': names must begin "
 752                      "with a lowercase letter"), key);
 753       return FALSE;
 754     }
 755
 756   for (i = 1; key[i]; i++)
 757     {
 758       if (key[i] != '-' &&
 759           !g_ascii_islower (key[i]) &&
 760           !g_ascii_isdigit (key[i]))
 761         {
 762           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 763                        _("invalid name '%s': invalid character '%c'; "
 764                          "only lowercase letters, numbers and dash ('-') "
 765                          "are permitted."), key, key[i]);
 766           return FALSE;
 767         }
 768
 769       if (key[i] == '-' && key[i + 1] == '-')
 770         {
 771           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 772                        _("invalid name '%s': two successive dashes ('--') "
 773                          "are not permitted."), key);
 774           return FALSE;
 775         }
 776     }
 777
 778   if (key[i - 1] == '-')
 779     {
 780       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 781                    _("invalid name '%s': the last character may not be a "
 782                      "dash ('-')."), key);
 783       return FALSE;
 784     }
 785
 786   if (i > 32)
 787     {
 788       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
 789                    _("invalid name '%s': maximum length is 32"), key);
 790       return FALSE;
 791     }
 792
 793   return TRUE;
 794 }
 795
 796 /* Handling of <schema> {{{1 */
 797 typedef struct _SchemaState SchemaState;
 798 struct _SchemaState
 799 {
 800   SchemaState *extends;
 801
 802   gchar       *path;
 803   gchar       *gettext_domain;
 804   gchar       *extends_name;
 805   gchar       *list_of;
 806
 807   GHashTable  *keys;
 808 };
 809
 810 static SchemaState *
 811 schema_state_new (const gchar  *path,
 812                   const gchar  *gettext_domain,
 813                   SchemaState  *extends,
 814                   const gchar  *extends_name,
 815                   const gchar  *list_of)
 816 {
 817   SchemaState *state;
 818
 819   state = g_slice_new (SchemaState);
 820   state->path = g_strdup (path);
 821   state->gettext_domain = g_strdup (gettext_domain);
 822   state->extends = extends;
 823   state->extends_name = g_strdup (extends_name);
 824   state->list_of = g_strdup (list_of);
 825   state->keys = g_hash_table_new_full (g_str_hash, g_str_equal,
 826                                        g_free, key_state_free);
 827
 828   return state;
 829 }
 830
 831 static void
 832 schema_state_free (gpointer data)
 833 {
 834   SchemaState *state = data;
 835
 836   g_free (state->path);
 837   g_free (state->gettext_domain);
 838   g_hash_table_unref (state->keys);
 839 }
 840
 841 static void
 842 schema_state_add_child (SchemaState  *state,
 843                         const gchar  *name,
 844                         const gchar  *schema,
 845                         GError      **error)
 846 {
 847   gchar *childname;
 848
 849   if (!is_valid_keyname (name, error))
 850     return;
 851
 852   childname = g_strconcat (name, "/", NULL);
 853
 854   if (g_hash_table_lookup (state->keys, childname))
 855     {
 856       g_set_error (error, G_MARKUP_ERROR,
 857                    G_MARKUP_ERROR_INVALID_CONTENT,
 858                    _("<child name='%s'> already specified"), name);
 859       return;
 860     }
 861
 862   g_hash_table_insert (state->keys, childname,
 863                        key_state_new_child (schema));
 864 }
 865
 866 static KeyState *
 867 schema_state_add_key (SchemaState  *state,
 868                       GHashTable   *enum_table,
 869                       GHashTable   *flags_table,
 870                       const gchar  *name,
 871                       const gchar  *type_string,
 872                       const gchar  *enum_type,
 873                       const gchar  *flags_type,
 874                       GError      **error)
 875 {
 876   SchemaState *node;
 877   GString *strinfo;
 878   KeyState *key;
 879
 880   if (state->list_of)
 881     {
 882       g_set_error_literal (error, G_MARKUP_ERROR,
 883                            G_MARKUP_ERROR_INVALID_CONTENT,
 884                            _("can not add keys to a 'list-of' schema"));
 885       return NULL;
 886     }
 887
 888   if (!is_valid_keyname (name, error))
 889     return NULL;
 890
 891   if (g_hash_table_lookup (state->keys, name))
 892     {
 893       g_set_error (error, G_MARKUP_ERROR,
 894                    G_MARKUP_ERROR_INVALID_CONTENT,
 895                    _("<key name='%s'> already specified"), name);
 896       return NULL;
 897     }
 898
 899   for (node = state; node; node = node->extends)
 900     if (node->extends)
 901       {
 902         KeyState *shadow;
 903
 904         shadow = g_hash_table_lookup (node->extends->keys, name);
 905
 906         /* in case of <key> <override> <key> make sure we report the
 907          * location of the original <key>, not the <override>.
 908          */
 909         if (shadow && !shadow->is_override)
 910           {
 911             g_set_error (error, G_MARKUP_ERROR,
 912                          G_MARKUP_ERROR_INVALID_CONTENT,
 913                          _("<key name='%s'> shadows <key name='%s'> in "
 914                            "<schema id='%s'>; use <override> to modify value"),
 915                          name, name, node->extends_name);
 916             return NULL;
 917           }
 918       }
 919
 920   if ((type_string != NULL) + (enum_type != NULL) + (flags_type != NULL) != 1)
 921     {
 922       g_set_error (error, G_MARKUP_ERROR,
 923                    G_MARKUP_ERROR_MISSING_ATTRIBUTE,
 924                    _("exactly one of 'type', 'enum' or 'flags' must "
 925                      "be specified as an attribute to <key>"));
 926       return NULL;
 927     }
 928
 929   if (type_string == NULL) /* flags or enums was specified */
 930     {
 931       EnumState *enum_state;
 932
 933       if (enum_type)
 934         enum_state = g_hash_table_lookup (enum_table, enum_type);
 935       else
 936         enum_state = g_hash_table_lookup (flags_table, flags_type);
 937
 938
 939       if (enum_state == NULL)
 940         {
 941           g_set_error (error, G_MARKUP_ERROR,
 942                        G_MARKUP_ERROR_INVALID_CONTENT,
 943                        _("<%s id='%s'> not (yet) defined."),
 944                        flags_type ? "flags"    : "enum",
 945                        flags_type ? flags_type : enum_type);
 946           return NULL;
 947         }
 948
 949       type_string = flags_type ? "as" : "s";
 950       strinfo = enum_state->strinfo;
 951     }
 952   else
 953     {
 954       if (!g_variant_type_string_is_valid (type_string))
 955         {
 956           g_set_error (error, G_MARKUP_ERROR,
 957                        G_MARKUP_ERROR_INVALID_CONTENT,
 958                        _("invalid GVariant type string '%s'"), type_string);
 959           return NULL;
 960         }
 961
 962       strinfo = NULL;
 963     }
 964
 965   key = key_state_new (type_string, state->gettext_domain,
 966                        enum_type != NULL, flags_type != NULL, strinfo);
 967   g_hash_table_insert (state->keys, g_strdup (name), key);
 968
 969   return key;
 970 }
 971
 972 static void
 973 schema_state_add_override (SchemaState  *state,
 974                            KeyState    **key_state,
 975                            GString     **string,
 976                            const gchar  *key,
 977                            const gchar  *l10n,
 978                            const gchar  *context,
 979                            GError      **error)
 980 {
 981   SchemaState *parent;
 982   KeyState *original;
 983
 984   if (state->extends == NULL)
 985     {
 986       g_set_error_literal (error, G_MARKUP_ERROR,
 987                            G_MARKUP_ERROR_INVALID_CONTENT,
 988                            _("<override> given but schema isn't "
 989                              "extending anything"));
 990       return;
 991     }
 992
 993   for (parent = state->extends; parent; parent = parent->extends)
 994     if ((original = g_hash_table_lookup (parent->keys, key)))
 995       break;
 996
 997   if (original == NULL)
 998     {
 999       g_set_error (error, G_MARKUP_ERROR,
1000                    G_MARKUP_ERROR_INVALID_CONTENT,
1001                    _("no <key name='%s'> to override"), key);
1002       return;
1003     }
1004
1005   if (g_hash_table_lookup (state->keys, key))
1006     {
1007       g_set_error (error, G_MARKUP_ERROR,
1008                    G_MARKUP_ERROR_INVALID_CONTENT,
1009                    _("<override name='%s'> already specified"), key);
1010       return;
1011     }
1012
1013   *key_state = key_state_override (original, state->gettext_domain);
1014   *string = key_state_start_default (*key_state, l10n, context, error);
1015   g_hash_table_insert (state->keys, g_strdup (key), *key_state);
1016 }
1017
1018 static void
1019 override_state_end (KeyState **key_state,
1020                     GString  **string,
1021                     GError   **error)
1022 {
1023   key_state_end_default (*key_state, string, error);
1024   *key_state = NULL;
1025 }
1026
1027 /* Handling of toplevel state {{{1 */
1028 typedef struct
1029 {
1030   GHashTable  *schema_table;            /* string -> SchemaState */
1031   GHashTable  *flags_table;             /* string -> EnumState */
1032   GHashTable  *enum_table;              /* string -> EnumState */
1033
1034   GSList      *this_file_schemas;       /* strings: <schema>s in this file */
1035   GSList      *this_file_flagss;        /* strings: <flags>s in this file */
1036   GSList      *this_file_enums;         /* strings: <enum>s in this file */
1037
1038   gchar       *schemalist_domain;       /* the <schemalist> gettext domain */
1039
1040   SchemaState *schema_state;            /* non-NULL when inside <schema> */
1041   KeyState    *key_state;               /* non-NULL when inside <key> */
1042   EnumState   *enum_state;              /* non-NULL when inside <enum> */
1043
1044   GString     *string;                  /* non-NULL when accepting text */
1045 } ParseState;
1046
1047 static gboolean
1048 is_subclass (const gchar *class_name,
1049              const gchar *possible_parent,
1050              GHashTable  *schema_table)
1051 {
1052   SchemaState *class;
1053
1054   if (strcmp (class_name, possible_parent) == 0)
1055     return TRUE;
1056
1057   class = g_hash_table_lookup (schema_table, class_name);
1058   g_assert (class != NULL);
1059
1060   return class->extends_name &&
1061          is_subclass (class->extends_name, possible_parent, schema_table);
1062 }
1063
1064 static void
1065 parse_state_start_schema (ParseState  *state,
1066                           const gchar  *id,
1067                           const gchar  *path,
1068                           const gchar  *gettext_domain,
1069                           const gchar  *extends_name,
1070                           const gchar  *list_of,
1071                           GError      **error)
1072 {
1073   SchemaState *extends;
1074   gchar *my_id;
1075
1076   if (g_hash_table_lookup (state->schema_table, id))
1077     {
1078       g_set_error (error, G_MARKUP_ERROR,
1079                    G_MARKUP_ERROR_INVALID_CONTENT,
1080                    _("<schema id='%s'> already specified"), id);
1081       return;
1082     }
1083
1084   if (extends_name)
1085     {
1086       extends = g_hash_table_lookup (state->schema_table, extends_name);
1087
1088       if (extends == NULL)
1089         {
1090           g_set_error (error, G_MARKUP_ERROR,
1091                        G_MARKUP_ERROR_INVALID_CONTENT,
1092                        _("<schema id='%s'> extends not yet "
1093                          "existing schema '%s'"), id, extends_name);
1094           return;
1095         }
1096     }
1097   else
1098     extends = NULL;
1099
1100   if (list_of)
1101     {
1102       SchemaState *tmp;
1103
1104       if (!(tmp = g_hash_table_lookup (state->schema_table, list_of)))
1105         {
1106           g_set_error (error, G_MARKUP_ERROR,
1107                        G_MARKUP_ERROR_INVALID_CONTENT,
1108                        _("<schema id='%s'> is list of not yet "
1109                          "existing schema '%s'"), id, list_of);
1110           return;
1111         }
1112
1113       if (tmp->path)
1114         {
1115           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
1116                        _("Can not be a list of a schema with a path"));
1117           return;
1118         }
1119     }
1120
1121   if (extends)
1122     {
1123       if (extends->path)
1124         {
1125           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
1126                        _("Can not extend a schema with a path"));
1127           return;
1128         }
1129
1130       if (list_of)
1131         {
1132           if (extends->list_of == NULL)
1133             {
1134               g_set_error (error, G_MARKUP_ERROR,
1135                            G_MARKUP_ERROR_INVALID_CONTENT,
1136                            _("<schema id='%s'> is a list, extending "
1137                              "<schema id='%s'> which is not a list"),
1138                            id, extends_name);
1139               return;
1140             }
1141
1142           if (!is_subclass (list_of, extends->list_of, state->schema_table))
1143             {
1144               g_set_error (error, G_MARKUP_ERROR,
1145                            G_MARKUP_ERROR_INVALID_CONTENT,
1146                            _("<schema id='%s' list-of='%s'> extends <schema "
1147                              "id='%s' list-of='%s'> but '%s' does not "
1148                              "extend '%s'"), id, list_of, extends_name,
1149                            extends->list_of, list_of, extends->list_of);
1150               return;
1151             }
1152         }
1153       else
1154         /* by default we are a list of the same thing that the schema
1155          * we are extending is a list of (which might be nothing)
1156          */
1157         list_of = extends->list_of;
1158     }
1159
1160   if (path && !(g_str_has_prefix (path, "/") && g_str_has_suffix (path, "/")))
1161     {
1162       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
1163                    _("a path, if given, must begin and end with a slash"));
1164       return;
1165     }
1166
1167   if (path && list_of && !g_str_has_suffix (path, ":/"))
1168     {
1169       g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
1170                    _("the path of a list must end with ':/'"));
1171       return;
1172     }
1173
1174   state->schema_state = schema_state_new (path, gettext_domain,
1175                                           extends, extends_name, list_of);
1176
1177   my_id = g_strdup (id);
1178   state->this_file_schemas = g_slist_prepend (state->this_file_schemas, my_id);
1179   g_hash_table_insert (state->schema_table, my_id, state->schema_state);
1180 }
1181
1182 static void
1183 parse_state_start_enum (ParseState   *state,
1184                         const gchar  *id,
1185                         gboolean      is_flags,
1186                         GError      **error)
1187 {
1188   GSList **list = is_flags ? &state->this_file_flagss : &state->this_file_enums;
1189   GHashTable *table = is_flags ? state->flags_table : state->enum_table;
1190   gchar *my_id;
1191
1192   if (g_hash_table_lookup (table, id))
1193     {
1194       g_set_error (error, G_MARKUP_ERROR,
1195                    G_MARKUP_ERROR_INVALID_CONTENT,
1196                    _("<%s id='%s'> already specified"),
1197                    is_flags ? "flags" : "enum", id);
1198       return;
1199     }
1200
1201   state->enum_state = enum_state_new (is_flags);
1202
1203   my_id = g_strdup (id);
1204   *list = g_slist_prepend (*list, my_id);
1205   g_hash_table_insert (table, my_id, state->enum_state);
1206 }
1207
1208 /* GMarkup Parser Functions {{{1 */
1209
1210 /* Start element {{{2 */
1211 static void
1212 start_element (GMarkupParseContext  *context,
1213                const gchar          *element_name,
1214                const gchar         **attribute_names,
1215                const gchar         **attribute_values,
1216                gpointer              user_data,
1217                GError              **error)
1218 {
1219   ParseState *state = user_data;
1220   const GSList *element_stack;
1221   const gchar *container;
1222
1223   element_stack = g_markup_parse_context_get_element_stack (context);
1224   container = element_stack->next ? element_stack->next->data : NULL;
1225
1226 #define COLLECT(first, ...) \
1227   g_markup_collect_attributes (element_name,                                 \
1228                                attribute_names, attribute_values, error,     \
1229                                first, __VA_ARGS__, G_MARKUP_COLLECT_INVALID)
1230 #define OPTIONAL   G_MARKUP_COLLECT_OPTIONAL
1231 #define STRDUP     G_MARKUP_COLLECT_STRDUP
1232 #define STRING     G_MARKUP_COLLECT_STRING
1233 #define NO_ATTRS()  COLLECT (G_MARKUP_COLLECT_INVALID, NULL)
1234
1235   /* Toplevel items {{{3 */
1236   if (container == NULL)
1237     {
1238       if (strcmp (element_name, "schemalist") == 0)
1239         {
1240           COLLECT (OPTIONAL | STRDUP,
1241                    "gettext-domain",
1242                    &state->schemalist_domain);
1243           return;
1244         }
1245     }
1246
1247
1248   /* children of <schemalist> {{{3 */
1249   else if (strcmp (container, "schemalist") == 0)
1250     {
1251       if (strcmp (element_name, "schema") == 0)
1252         {
1253           const gchar *id, *path, *gettext_domain, *extends, *list_of;
1254           if (COLLECT (STRING, "id", &id,
1255                        OPTIONAL | STRING, "path", &path,
1256                        OPTIONAL | STRING, "gettext-domain", &gettext_domain,
1257                        OPTIONAL | STRING, "extends", &extends,
1258                        OPTIONAL | STRING, "list-of", &list_of))
1259             parse_state_start_schema (state, id, path,
1260                                       gettext_domain ? gettext_domain
1261                                                      : state->schemalist_domain,
1262                                       extends, list_of, error);
1263           return;
1264         }
1265
1266       else if (strcmp (element_name, "enum") == 0)
1267         {
1268           const gchar *id;
1269           if (COLLECT (STRING, "id", &id))
1270             parse_state_start_enum (state, id, FALSE, error);
1271           return;
1272         }
1273
1274       else if (strcmp (element_name, "flags") == 0)
1275         {
1276           const gchar *id;
1277           if (COLLECT (STRING, "id", &id))
1278             parse_state_start_enum (state, id, TRUE, error);
1279           return;
1280         }
1281     }
1282
1283
1284   /* children of <schema> {{{3 */
1285   else if (strcmp (container, "schema") == 0)
1286     {
1287       if (strcmp (element_name, "key") == 0)
1288         {
1289           const gchar *name, *type_string, *enum_type, *flags_type;
1290
1291           if (COLLECT (STRING,            "name",  &name,
1292                        OPTIONAL | STRING, "type",  &type_string,
1293                        OPTIONAL | STRING, "enum",  &enum_type,
1294                        OPTIONAL | STRING, "flags", &flags_type))
1295
1296             state->key_state = schema_state_add_key (state->schema_state,
1297                                                      state->enum_table,
1298                                                      state->flags_table,
1299                                                      name, type_string,
1300                                                      enum_type, flags_type,
1301                                                      error);
1302           return;
1303         }
1304       else if (strcmp (element_name, "child") == 0)
1305         {
1306           const gchar *name, *schema;
1307
1308           if (COLLECT (STRING, "name", &name, STRING, "schema", &schema))
1309             schema_state_add_child (state->schema_state,
1310                                     name, schema, error);
1311           return;
1312         }
1313       else if (strcmp (element_name, "override") == 0)
1314         {
1315           const gchar *name, *l10n, *context;
1316
1317           if (COLLECT (STRING,            "name",    &name,
1318                        OPTIONAL | STRING, "l10n",    &l10n,
1319                        OPTIONAL | STRING, "context", &context))
1320             schema_state_add_override (state->schema_state,
1321                                        &state->key_state, &state->string,
1322                                        name, l10n, context, error);
1323           return;
1324         }
1325     }
1326
1327   /* children of <key> {{{3 */
1328   else if (strcmp (container, "key") == 0)
1329     {
1330       if (strcmp (element_name, "default") == 0)
1331         {
1332           const gchar *l10n, *context;
1333           if (COLLECT (STRING | OPTIONAL, "l10n",    &l10n,
1334                        STRING | OPTIONAL, "context", &context))
1335             state->string = key_state_start_default (state->key_state,
1336                                                      l10n, context, error);
1337           return;
1338         }
1339
1340       else if (strcmp (element_name, "summary") == 0 ||
1341                strcmp (element_name, "description") == 0)
1342         {
1343           if (NO_ATTRS ())
1344             state->string = g_string_new (NULL);
1345           return;
1346         }
1347
1348       else if (strcmp (element_name, "range") == 0)
1349         {
1350           const gchar *min, *max;
1351           if (COLLECT (STRING | OPTIONAL, "min", &min,
1352                        STRING | OPTIONAL, "max", &max))
1353             key_state_set_range (state->key_state, min, max, error);
1354           return;
1355         }
1356
1357       else if (strcmp (element_name, "choices") == 0)
1358         {
1359           if (NO_ATTRS ())
1360             key_state_start_choices (state->key_state, error);
1361           return;
1362         }
1363
1364       else if (strcmp (element_name, "aliases") == 0)
1365         {
1366           if (NO_ATTRS ())
1367             key_state_start_aliases (state->key_state, error);
1368           return;
1369         }
1370     }
1371
1372
1373   /* children of <choices> {{{3 */
1374   else if (strcmp (container, "choices") == 0)
1375     {
1376       if (strcmp (element_name, "choice") == 0)
1377         {
1378           const gchar *value;
1379           if (COLLECT (STRING, "value", &value))
1380             key_state_add_choice (state->key_state, value, error);
1381           return;
1382         }
1383     }
1384
1385
1386   /* children of <aliases> {{{3 */
1387   else if (strcmp (container, "aliases") == 0)
1388     {
1389       if (strcmp (element_name, "alias") == 0)
1390         {
1391           const gchar *value, *target;
1392           if (COLLECT (STRING, "value", &value, STRING, "target", &target))
1393             key_state_add_alias (state->key_state, value, target, error);
1394           return;
1395         }
1396     }
1397
1398
1399   /* children of <enum> {{{3 */
1400   else if (strcmp (container, "enum") == 0 ||
1401            strcmp (container, "flags") == 0)
1402     {
1403       if (strcmp (element_name, "value") == 0)
1404         {
1405           const gchar *nick, *valuestr;
1406           if (COLLECT (STRING, "nick", &nick,
1407                        STRING, "value", &valuestr))
1408             enum_state_add_value (state->enum_state, nick, valuestr, error);
1409           return;
1410         }
1411     }
1412   /* 3}}} */
1413
1414   if (container)
1415     g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
1416                  _("Element <%s> not allowed inside <%s>"),
1417                  element_name, container);
1418   else
1419     g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_UNKNOWN_ELEMENT,
1420                  _("Element <%s> not allowed at toplevel"), element_name);
1421 }
1422 /* 2}}} */
1423 /* End element {{{2 */
1424
1425 static void
1426 key_state_end (KeyState **state_ptr,
1427                GError   **error)
1428 {
1429   KeyState *state;
1430
1431   state = *state_ptr;
1432   *state_ptr = NULL;
1433
1434   if (state->default_value == NULL)
1435     {
1436       g_set_error_literal (error,
1437                            G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
1438                            "element <default> is required in <key>");
1439       return;
1440     }
1441 }
1442
1443 static void
1444 schema_state_end (SchemaState **state_ptr,
1445                   GError      **error)
1446 {
1447   *state_ptr = NULL;
1448 }
1449
1450 static void
1451 end_element (GMarkupParseContext  *context,
1452              const gchar          *element_name,
1453              gpointer              user_data,
1454              GError              **error)
1455 {
1456   ParseState *state = user_data;
1457
1458   if (strcmp (element_name, "schemalist") == 0)
1459     {
1460       g_free (state->schemalist_domain);
1461       state->schemalist_domain = NULL;
1462     }
1463
1464   else if (strcmp (element_name, "enum") == 0 ||
1465            strcmp (element_name, "flags") == 0)
1466     enum_state_end (&state->enum_state, error);
1467
1468   else if (strcmp (element_name, "schema") == 0)
1469     schema_state_end (&state->schema_state, error);
1470
1471   else if (strcmp (element_name, "override") == 0)
1472     override_state_end (&state->key_state, &state->string, error);
1473
1474   else if (strcmp (element_name, "key") == 0)
1475     key_state_end (&state->key_state, error);
1476
1477   else if (strcmp (element_name, "default") == 0)
1478     key_state_end_default (state->key_state, &state->string, error);
1479
1480   else if (strcmp (element_name, "choices") == 0)
1481     key_state_end_choices (state->key_state, error);
1482
1483   else if (strcmp (element_name, "aliases") == 0)
1484     key_state_end_aliases (state->key_state, error);
1485
1486   if (state->string)
1487     {
1488       g_string_free (state->string, TRUE);
1489       state->string = NULL;
1490     }
1491 }
1492 /* Text {{{2 */
1493 static void
1494 text (GMarkupParseContext  *context,
1495       const gchar          *text,
1496       gsize                 text_len,
1497       gpointer              user_data,
1498       GError              **error)
1499 {
1500   ParseState *state = user_data;
1501   gsize i;
1502
1503   for (i = 0; i < text_len; i++)
1504     if (!g_ascii_isspace (text[i]))
1505       {
1506         if (state->string)
1507           g_string_append_len (state->string, text, text_len);
1508
1509         else
1510           g_set_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_INVALID_CONTENT,
1511                        _("text may not appear inside <%s>"),
1512                        g_markup_parse_context_get_element (context));
1513
1514         break;
1515       }
1516 }
1517
1518 /* Write to GVDB {{{1 */
1519 typedef struct
1520 {
1521   GHashTable *table;
1522   GvdbItem *root;
1523 } GvdbPair;
1524
1525 static void
1526 gvdb_pair_init (GvdbPair *pair)
1527 {
1528   pair->table = gvdb_hash_table_new (NULL, NULL);
1529   pair->root = gvdb_hash_table_insert (pair->table, "");
1530 }
1531
1532 typedef struct
1533 {
1534   GHashTable *schema_table;
1535   GvdbPair root_pair;
1536 } WriteToFileData;
1537
1538 typedef struct
1539 {
1540   GHashTable *schema_table;
1541   GvdbPair pair;
1542   gboolean l10n;
1543 } OutputSchemaData;
1544
1545 static void
1546 output_key (gpointer key,
1547             gpointer value,
1548             gpointer user_data)
1549 {
1550   OutputSchemaData *data;
1551   const gchar *name;
1552   KeyState *state;
1553   GvdbItem *item;
1554
1555   name = key;
1556   state = value;
1557   data = user_data;
1558
1559   item = gvdb_hash_table_insert (data->pair.table, name);
1560   gvdb_item_set_parent (item, data->pair.root);
1561   gvdb_item_set_value (item, key_state_serialise (state));
1562
1563   if (state->l10n)
1564     data->l10n = TRUE;
1565
1566   if (state->child_schema &&
1567       !g_hash_table_lookup (data->schema_table, state->child_schema))
1568     g_printerr ("warning: undefined reference to <schema id='%s'/>\n",
1569                 state->child_schema);
1570 }
1571
1572 static void
1573 output_schema (gpointer key,
1574                gpointer value,
1575                gpointer user_data)
1576 {
1577   WriteToFileData *wtf_data = user_data;
1578   OutputSchemaData data;
1579   GvdbPair *root_pair;
1580   SchemaState *state;
1581   const gchar *id;
1582   GvdbItem *item;
1583
1584   id = key;
1585   state = value;
1586   root_pair = &wtf_data->root_pair;
1587
1588   data.schema_table = wtf_data->schema_table;
1589   gvdb_pair_init (&data.pair);
1590   data.l10n = FALSE;
1591
1592   item = gvdb_hash_table_insert (root_pair->table, id);
1593   gvdb_item_set_parent (item, root_pair->root);
1594   gvdb_item_set_hash_table (item, data.pair.table);
1595
1596   g_hash_table_foreach (state->keys, output_key, &data);
1597
1598   if (state->path)
1599     gvdb_hash_table_insert_string (data.pair.table, ".path", state->path);
1600
1601   if (state->extends_name)
1602     gvdb_hash_table_insert_string (data.pair.table, ".extends",
1603                                    state->extends_name);
1604
1605   if (state->list_of)
1606     gvdb_hash_table_insert_string (data.pair.table, ".list-of",
1607                                    state->extends_name);
1608
1609   if (data.l10n)
1610     gvdb_hash_table_insert_string (data.pair.table,
1611                                    ".gettext-domain",
1612                                    state->gettext_domain);
1613 }
1614
1615 static gboolean
1616 write_to_file (GHashTable   *schema_table,
1617                const gchar  *filename,
1618                GError      **error)
1619 {
1620   WriteToFileData data;
1621   gboolean success;
1622
1623   data.schema_table = schema_table;
1624
1625   gvdb_pair_init (&data.root_pair);
1626
1627   g_hash_table_foreach (schema_table, output_schema, &data);
1628
1629   success = gvdb_table_write_contents (data.root_pair.table, filename,
1630                                        G_BYTE_ORDER != G_LITTLE_ENDIAN,
1631                                        error);
1632   g_hash_table_unref (data.root_pair.table);
1633
1634   return success;
1635 }
1636
1637 /* Parser driver {{{1 */
1638 static GHashTable *
1639 parse_gschema_files (gchar    **files,
1640                      gboolean   strict)
1641 {
1642   GMarkupParser parser = { start_element, end_element, text };
1643   ParseState state = { 0, };
1644   const gchar *filename;
1645   GError *error = NULL;
1646
1647   state.enum_table = g_hash_table_new_full (g_str_hash, g_str_equal,
1648                                             g_free, enum_state_free);
1649
1650   state.flags_table = g_hash_table_new_full (g_str_hash, g_str_equal,
1651                                              g_free, enum_state_free);
1652
1653   state.schema_table = g_hash_table_new_full (g_str_hash, g_str_equal,
1654                                               g_free, schema_state_free);
1655
1656   while ((filename = *files++) != NULL)
1657     {
1658       GMarkupParseContext *context;
1659       gchar *contents;
1660       gsize size;
1661
1662       if (!g_file_get_contents (filename, &contents, &size, &error))
1663         {
1664           fprintf (stderr, "%s\n", error->message);
1665           g_clear_error (&error);
1666           continue;
1667         }
1668
1669       context = g_markup_parse_context_new (&parser,
1670                                             G_MARKUP_PREFIX_ERROR_POSITION,
1671                                             &state, NULL);
1672
1673
1674       if (!g_markup_parse_context_parse (context, contents, size, &error) ||
1675           !g_markup_parse_context_end_parse (context, &error))
1676         {
1677           GSList *item;
1678
1679           /* back out any changes from this file */
1680           for (item = state.this_file_schemas; item; item = item->next)
1681             g_hash_table_remove (state.schema_table, item->data);
1682
1683           for (item = state.this_file_flagss; item; item = item->next)
1684             g_hash_table_remove (state.flags_table, item->data);
1685
1686           for (item = state.this_file_enums; item; item = item->next)
1687             g_hash_table_remove (state.enum_table, item->data);
1688
1689           /* let them know */
1690           fprintf (stderr, "%s: %s.  ", filename, error->message);
1691           g_clear_error (&error);
1692
1693           if (strict)
1694             {
1695               /* Translators: Do not translate "--strict". */
1696               fprintf (stderr, _("--strict was specified; exiting.\n"));
1697               g_hash_table_unref (state.schema_table);
1698               g_hash_table_unref (state.flags_table);
1699               g_hash_table_unref (state.enum_table);
1700
1701               return NULL;
1702             }
1703           else
1704             fprintf (stderr, _("This entire file has been ignored.\n"));
1705         }
1706
1707       /* cleanup */
1708       g_markup_parse_context_free (context);
1709       g_slist_free (state.this_file_schemas);
1710       g_slist_free (state.this_file_flagss);
1711       g_slist_free (state.this_file_enums);
1712       state.this_file_schemas = NULL;
1713       state.this_file_flagss = NULL;
1714       state.this_file_enums = NULL;
1715     }
1716
1717   g_hash_table_unref (state.flags_table);
1718   g_hash_table_unref (state.enum_table);
1719
1720   return state.schema_table;
1721 }
1722
1723 static gint
1724 compare_strings (gconstpointer a,
1725                  gconstpointer b)
1726 {
1727   gchar *one = *(gchar **) a;
1728   gchar *two = *(gchar **) b;
1729   gint cmp;
1730
1731   cmp = g_str_has_suffix (two, ".enums.xml") -
1732         g_str_has_suffix (one, ".enums.xml");
1733
1734   if (!cmp)
1735     cmp = strcmp (one, two);
1736
1737   return cmp;
1738 }
1739
1740 static gboolean
1741 set_overrides (GHashTable  *schema_table,
1742                gchar      **files,
1743                gboolean     strict)
1744 {
1745   const gchar *filename;
1746   GError *error = NULL;
1747
1748   while ((filename = *files++))
1749     {
1750       GKeyFile *key_file;
1751       gchar **groups;
1752       gint i;
1753
1754       key_file = g_key_file_new ();
1755       if (!g_key_file_load_from_file (key_file, filename, 0, &error))
1756         {
1757           fprintf (stderr, "%s: %s.  ", filename, error->message);
1758           g_key_file_free (key_file);
1759           g_clear_error (&error);
1760
1761           if (!strict)
1762             {
1763               fprintf (stderr, _("Ignoring this file.\n"));
1764               continue;
1765             }
1766
1767           fprintf (stderr, _("--strict was specified; exiting.\n"));
1768           return FALSE;
1769         }
1770
1771       groups = g_key_file_get_groups (key_file, NULL);
1772
1773       for (i = 0; groups[i]; i++)
1774         {
1775           const gchar *group = groups[i];
1776           SchemaState *schema;
1777           gchar **keys;
1778           gint j;
1779
1780           schema = g_hash_table_lookup (schema_table, group);
1781
1782           if (schema == NULL)
1783             /* Having the schema not be installed is expected to be a
1784              * common case.  Don't even emit an error message about
1785              * that.
1786              */
1787             continue;
1788
1789           keys = g_key_file_get_keys (key_file, group, NULL, NULL);
1790           g_assert (keys != NULL);
1791
1792           for (j = 0; keys[j]; j++)
1793             {
1794               const gchar *key = keys[j];
1795               KeyState *state;
1796               GVariant *value;
1797               gchar *string;
1798
1799               state = g_hash_table_lookup (schema->keys, key);
1800
1801               if (state == NULL)
1802                 {
1803                   fprintf (stderr, _("No such key `%s' in schema `%s' as "
1804                                      "specified in override file `%s'"),
1805                            key, group, filename);
1806
1807                   if (!strict)
1808                     {
1809                       fprintf (stderr, _("; ignoring override for this key.\n"));
1810                       continue;
1811                     }
1812
1813                   fprintf (stderr, _(" and --strict was specified; exiting.\n"));
1814                   g_key_file_free (key_file);
1815                   g_strfreev (groups);
1816                   g_strfreev (keys);
1817
1818                   return FALSE;
1819                 }
1820
1821               string = g_key_file_get_value (key_file, group, key, NULL);
1822               g_assert (string != NULL);
1823
1824               value = g_variant_parse (state->type, string,
1825                                        NULL, NULL, &error);
1826
1827               if (value == NULL)
1828                 {
1829                   fprintf (stderr, _("error parsing key `%s' in schema `%s' "
1830                                      "as specified in override file `%s': "
1831                                      "%s.  "),
1832                            key, group, filename, error->message);
1833
1834                   g_clear_error (&error);
1835                   g_free (string);
1836
1837                   if (!strict)
1838                     {
1839                       fprintf (stderr, _("Ignoring override for this key.\n"));
1840                       continue;
1841                     }
1842
1843                   fprintf (stderr, _("--strict was specified; exiting.\n"));
1844                   g_key_file_free (key_file);
1845                   g_strfreev (groups);
1846                   g_strfreev (keys);
1847
1848                   return FALSE;
1849                 }
1850
1851               if (state->minimum)
1852                 {
1853                   if (g_variant_compare (value, state->minimum) < 0 ||
1854                       g_variant_compare (value, state->maximum) > 0)
1855                     {
1856                       fprintf (stderr,
1857                                _("override for key `%s' in schema `%s' in "
1858                                  "override file `%s' is out of the range "
1859                                  "given in the schema"),
1860                                key, group, filename);
1861
1862                       g_variant_unref (value);
1863                       g_free (string);
1864
1865                       if (!strict)
1866                         {
1867                           fprintf (stderr, _("; ignoring override for this key.\n"));
1868                           continue;
1869                         }
1870
1871                       fprintf (stderr, _(" and --strict was specified; exiting.\n"));
1872                       g_key_file_free (key_file);
1873                       g_strfreev (groups);
1874                       g_strfreev (keys);
1875
1876                       return FALSE;
1877                     }
1878                 }
1879
1880               else if (state->strinfo->len)
1881                 {
1882                   if (!is_valid_choices (value, state->strinfo))
1883                     {
1884                       fprintf (stderr,
1885                                _("override for key `%s' in schema `%s' in "
1886                                  "override file `%s' is not in the list "
1887                                  "of valid choices"),
1888                                key, group, filename);
1889
1890                       g_variant_unref (value);
1891                       g_free (string);
1892
1893                       if (!strict)
1894                         {
1895                           fprintf (stderr, _("; ignoring override for this key.\n"));
1896                           continue;
1897                         }
1898
1899                       fprintf (stderr, _(" and --strict was specified; exiting.\n"));
1900                       g_key_file_free (key_file);
1901                       g_strfreev (groups);
1902                       g_strfreev (keys);
1903
1904                       return FALSE;
1905                     }
1906                 }
1907
1908               g_variant_unref (state->default_value);
1909               state->default_value = value;
1910               g_free (string);
1911             }
1912
1913           g_strfreev (keys);
1914         }
1915
1916       g_strfreev (groups);
1917     }
1918
1919   return TRUE;
1920 }
1921
1922 int
1923 main (int argc, char **argv)
1924 {
1925   GError *error;
1926   GHashTable *table;
1927   GDir *dir;
1928   const gchar *file;
1929   gchar *srcdir;
1930   gchar *targetdir = NULL;
1931   gchar *target;
1932   gboolean uninstall = FALSE;
1933   gboolean dry_run = FALSE;
1934   gboolean strict = FALSE;
1935   gchar **schema_files = NULL;
1936   gchar **override_files = NULL;
1937   GOptionContext *context;
1938   GOptionEntry entries[] = {
1939     { "targetdir", 0, 0, G_OPTION_ARG_FILENAME, &targetdir, N_("where to store the gschemas.compiled file"), N_("DIRECTORY") },
1940     { "strict", 0, 0, G_OPTION_ARG_NONE, &strict, N_("Abort on any errors in schemas"), NULL },
1941     { "dry-run", 0, 0, G_OPTION_ARG_NONE, &dry_run, N_("Do not write the gschema.compiled file"), NULL },
1942     { "uninstall", 0, 0, G_OPTION_ARG_NONE, &uninstall, N_("This option will be removed soon.") },
1943     { "allow-any-name", 0, 0, G_OPTION_ARG_NONE, &allow_any_name, N_("Do not enforce key name restrictions") },
1944
1945     /* These options are only for use in the gschema-compile tests */
1946     { "schema-file", 0, G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_FILENAME_ARRAY, &schema_files, NULL, NULL },
1947     { NULL }
1948   };
1949
1950   setlocale (LC_ALL, "");
1951   textdomain (GETTEXT_PACKAGE);
1952 #ifdef G_OS_WIN32
1953   extern gchar *_glib_get_locale_dir (void);
1954   gchar *tmp = _glib_get_locale_dir ();
1955   bindtextdomain (GETTEXT_PACKAGE, tmp);
1956   g_free (tmp);
1957 #else
1958   bindtextdomain (GETTEXT_PACKAGE, GLIB_LOCALE_DIR);
1959 #endif
1960
1961 #ifdef HAVE_BIND_TEXTDOMAIN_CODESET
1962   bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
1963 #endif
1964
1965   context = g_option_context_new (N_("DIRECTORY"));
1966   g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
1967   g_option_context_set_summary (context,
1968     N_("Compile all GSettings schema files into a schema cache.\n"
1969        "Schema files are required to have the extension .gschema.xml,\n"
1970        "and the cache file is called gschemas.compiled."));
1971   g_option_context_add_main_entries (context, entries, GETTEXT_PACKAGE);
1972
1973   error = NULL;
1974   if (!g_option_context_parse (context, &argc, &argv, &error))
1975     {
1976       fprintf (stderr, "%s\n", error->message);
1977       return 1;
1978     }
1979
1980   g_option_context_free (context);
1981
1982   if (!schema_files && argc != 2)
1983     {
1984       fprintf (stderr, _("You should give exactly one directory name\n"));
1985       return 1;
1986     }
1987
1988   srcdir = argv[1];
1989
1990   if (targetdir == NULL)
1991     targetdir = srcdir;
1992
1993   target = g_build_filename (targetdir, "gschemas.compiled", NULL);
1994
1995   if (!schema_files)
1996     {
1997       GPtrArray *overrides;
1998       GPtrArray *files;
1999
2000       files = g_ptr_array_new ();
2001       overrides = g_ptr_array_new ();
2002
2003       dir = g_dir_open (srcdir, 0, &error);
2004       if (dir == NULL)
2005         {
2006           fprintf (stderr, "%s\n", error->message);
2007           return 1;
2008         }
2009
2010       while ((file = g_dir_read_name (dir)) != NULL)
2011         {
2012           if (g_str_has_suffix (file, ".gschema.xml") ||
2013               g_str_has_suffix (file, ".enums.xml"))
2014             g_ptr_array_add (files, g_build_filename (srcdir, file, NULL));
2015
2016           else if (g_str_has_suffix (file, ".gschema.override"))
2017             g_ptr_array_add (overrides,
2018                              g_build_filename (srcdir, file, NULL));
2019         }
2020
2021       if (files->len == 0)
2022         {
2023           fprintf (stderr, _("No schema files found: "));
2024
2025           if (g_unlink (target))
2026             fprintf (stderr, _("doing nothing.\n"));
2027
2028           else
2029             fprintf (stderr, _("removed existing output file.\n"));
2030
2031           return 0;
2032         }
2033       g_ptr_array_sort (files, compare_strings);
2034       g_ptr_array_add (files, NULL);
2035
2036       g_ptr_array_sort (overrides, compare_strings);
2037       g_ptr_array_add (overrides, NULL);
2038
2039       schema_files = (char **) g_ptr_array_free (files, FALSE);
2040       override_files = (gchar **) g_ptr_array_free (overrides, FALSE);
2041     }
2042
2043   if ((table = parse_gschema_files (schema_files, strict)) == NULL)
2044     {
2045       g_free (target);
2046       return 1;
2047     }
2048
2049   if (override_files != NULL &&
2050       !set_overrides (table, override_files, strict))
2051     {
2052       g_free (target);
2053       return 1;
2054     }
2055
2056   if (!dry_run && !write_to_file (table, target, &error))
2057     {
2058       fprintf (stderr, "%s\n", error->message);
2059       g_free (target);
2060       return 1;
2061     }
2062
2063   g_free (target);
2064
2065   return 0;
2066 }
2067
2068 /* Epilogue {{{1 */
2069
2070 /* vim:set foldmethod=marker: */