2 * Copyright © 2009, 2010 Codethink Limited
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.
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.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
17 * Author: Ryan Lortie <desrt@desrt.ca>
29 #include "gstrfuncs.h"
30 #include "gtestutils.h"
32 #include "gvarianttype.h"
38 * designed by ryan lortie and william hua
39 * designed in itb-229 and at ghazi's, 2009.
43 * G_VARIANT_PARSE_ERROR:
45 * Error domain for GVariant text format parsing. Specific error codes
46 * are not currently defined for this domain. See #GError for
47 * information on error domains.
51 * @G_VARIANT_PARSE_ERROR_FAILED: generic error (unused)
52 * @G_VARIANT_PARSE_ERROR_BASIC_TYPE_EXPECTED: a non-basic #GVariantType was given where a basic type was expected
53 * @G_VARIANT_PARSE_ERROR_CANNOT_INFER_TYPE: cannot infer the #GVariantType
54 * @G_VARIANT_PARSE_ERROR_DEFINITE_TYPE_EXPECTED: an indefinite #GVariantType was given where a definite type was expected
55 * @G_VARIANT_PARSE_ERROR_INPUT_NOT_AT_END: extra data after parsing finished
56 * @G_VARIANT_PARSE_ERROR_INVALID_CHARACTER: invalid character in number or unicode escape
57 * @G_VARIANT_PARSE_ERROR_INVALID_FORMAT_STRING: not a valid #GVariant format string
58 * @G_VARIANT_PARSE_ERROR_INVALID_OBJECT_PATH: not a valid object path
59 * @G_VARIANT_PARSE_ERROR_INVALID_SIGNATURE: not a valid type signature
60 * @G_VARIANT_PARSE_ERROR_INVALID_TYPE_STRING: not a valid #GVariant type string
61 * @G_VARIANT_PARSE_ERROR_NO_COMMON_TYPE: could not find a common type for array entries
62 * @G_VARIANT_PARSE_ERROR_NUMBER_OUT_OF_RANGE: the numerical value is out of range of the given type
63 * @G_VARIANT_PARSE_ERROR_NUMBER_TOO_BIG: the numerical value is out of range for any type
64 * @G_VARIANT_PARSE_ERROR_TYPE_ERROR: cannot parse as variant of the specified type
65 * @G_VARIANT_PARSE_ERROR_UNEXPECTED_TOKEN: an unexpected token was encountered
66 * @G_VARIANT_PARSE_ERROR_UNKNOWN_KEYWORD: an unknown keyword was encountered
67 * @G_VARIANT_PARSE_ERROR_UNTERMINATED_STRING_CONSTANT: unterminated string constant
68 * @G_VARIANT_PARSE_ERROR_VALUE_EXPECTED: no value given
70 * Error codes returned by parsing text-format GVariants.
72 G_DEFINE_QUARK (g-variant-parse-error-quark, g_variant_parse_error)
75 * g_variant_parser_get_error_quark:
77 * Same as g_variant_error_quark().
79 * Deprecated: Use g_variant_parse_error_quark() instead.
82 g_variant_parser_get_error_quark (void)
84 return g_variant_parse_error_quark ();
94 parser_set_error_va (GError **error,
101 GString *msg = g_string_new (NULL);
103 if (location->start == location->end)
104 g_string_append_printf (msg, "%d", location->start);
106 g_string_append_printf (msg, "%d-%d", location->start, location->end);
110 g_assert (other->start != other->end);
111 g_string_append_printf (msg, ",%d-%d", other->start, other->end);
113 g_string_append_c (msg, ':');
115 g_string_append_vprintf (msg, format, ap);
116 g_set_error_literal (error, G_VARIANT_PARSE_ERROR, code, msg->str);
117 g_string_free (msg, TRUE);
122 parser_set_error (GError **error,
131 va_start (ap, format);
132 parser_set_error_va (error, location, other, code, format, ap);
148 token_stream_set_error (TokenStream *stream,
158 ref.start = stream->this - stream->start;
161 ref.end = stream->stream - stream->start;
165 va_start (ap, format);
166 parser_set_error_va (error, &ref, NULL, code, format, ap);
171 token_stream_prepare (TokenStream *stream)
176 if (stream->this != NULL)
179 while (stream->stream != stream->end && g_ascii_isspace (*stream->stream))
182 if (stream->stream == stream->end || *stream->stream == '\0')
184 stream->this = stream->stream;
188 switch (stream->stream[0])
190 case '-': case '+': case '.': case '0': case '1': case '2':
191 case '3': case '4': case '5': case '6': case '7': case '8':
193 for (end = stream->stream; end != stream->end; end++)
194 if (!g_ascii_isalnum (*end) &&
195 *end != '-' && *end != '+' && *end != '.')
200 if (stream->stream[1] == '\'' || stream->stream[1] == '"')
202 for (end = stream->stream + 2; end != stream->end; end++)
203 if (*end == stream->stream[1] || *end == '\0' ||
204 (*end == '\\' && (++end == stream->end || *end == '\0')))
207 if (end != stream->end && *end)
214 case 'a': /* 'b' */ case 'c': case 'd': case 'e': case 'f':
215 case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
216 case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
217 case 's': case 't': case 'u': case 'v': case 'w': case 'x':
219 for (end = stream->stream; end != stream->end; end++)
220 if (!g_ascii_isalnum (*end))
225 for (end = stream->stream + 1; end != stream->end; end++)
226 if (*end == stream->stream[0] || *end == '\0' ||
227 (*end == '\\' && (++end == stream->end || *end == '\0')))
230 if (end != stream->end && *end)
235 /* stop at the first space, comma, colon or unmatched bracket.
236 * deals nicely with cases like (%i, %i) or {%i: %i}.
237 * Also: ] and > are never in format strings.
239 for (end = stream->stream + 1;
240 end != stream->end && *end != ',' &&
241 *end != ':' && *end != '>' && *end != ']' && !g_ascii_isspace (*end);
244 if (*end == '(' || *end == '{')
247 else if ((*end == ')' || *end == '}') && !brackets--)
253 end = stream->stream + 1;
257 stream->this = stream->stream;
258 stream->stream = end;
264 token_stream_next (TokenStream *stream)
270 token_stream_peek (TokenStream *stream,
273 if (!token_stream_prepare (stream))
276 return stream->this[0] == first_char;
280 token_stream_peek2 (TokenStream *stream,
284 if (!token_stream_prepare (stream))
287 return stream->this[0] == first_char &&
288 stream->this[1] == second_char;
292 token_stream_is_keyword (TokenStream *stream)
294 if (!token_stream_prepare (stream))
297 return g_ascii_isalpha (stream->this[0]) &&
298 g_ascii_isalpha (stream->this[1]);
302 token_stream_is_numeric (TokenStream *stream)
304 if (!token_stream_prepare (stream))
307 return (g_ascii_isdigit (stream->this[0]) ||
308 stream->this[0] == '-' ||
309 stream->this[0] == '+' ||
310 stream->this[0] == '.');
314 token_stream_peek_string (TokenStream *stream,
317 gint length = strlen (token);
319 return token_stream_prepare (stream) &&
320 stream->stream - stream->this == length &&
321 memcmp (stream->this, token, length) == 0;
325 token_stream_consume (TokenStream *stream,
328 if (!token_stream_peek_string (stream, token))
331 token_stream_next (stream);
336 token_stream_require (TokenStream *stream,
338 const gchar *purpose,
342 if (!token_stream_consume (stream, token))
344 token_stream_set_error (stream, error, FALSE,
345 G_VARIANT_PARSE_ERROR_UNEXPECTED_TOKEN,
346 "expected '%s'%s", token, purpose);
354 token_stream_assert (TokenStream *stream,
357 gboolean correct_token;
359 correct_token = token_stream_consume (stream, token);
360 g_assert (correct_token);
364 token_stream_get (TokenStream *stream)
368 if (!token_stream_prepare (stream))
371 result = g_strndup (stream->this, stream->stream - stream->this);
377 token_stream_start_ref (TokenStream *stream,
380 token_stream_prepare (stream);
381 ref->start = stream->this - stream->start;
385 token_stream_end_ref (TokenStream *stream,
388 ref->end = stream->stream - stream->start;
392 pattern_copy (gchar **out,
397 while (**in == 'a' || **in == 'm' || **in == 'M')
398 *(*out)++ = *(*in)++;
402 if (**in == '(' || **in == '{')
405 else if (**in == ')' || **in == '}')
408 *(*out)++ = *(*in)++;
414 pattern_coalesce (const gchar *left,
420 /* the length of the output is loosely bound by the sum of the input
421 * lengths, not simply the greater of the two lengths.
423 * (*(iii)) + ((iii)*) ((iii)(iii))
427 out = result = g_malloc (strlen (left) + strlen (right));
429 while (*left && *right)
439 const gchar **one = &left, **the_other = &right;
442 if (**one == '*' && **the_other != ')')
444 pattern_copy (&out, the_other);
448 else if (**one == 'M' && **the_other == 'm')
450 *out++ = *(*the_other)++;
453 else if (**one == 'M' && **the_other != 'm')
458 else if (**one == 'N' && strchr ("ynqiuxthfd", **the_other))
460 *out++ = *(*the_other)++;
464 else if (**one == 'D' && (**the_other == 'f' || **the_other == 'd'))
466 *out++ = *(*the_other)++;
470 else if (**one == 'S' && strchr ("sog", **the_other))
472 *out++ = *(*the_other)++;
476 else if (one == &left)
478 one = &right, the_other = &left;
498 typedef struct _AST AST;
499 typedef gchar * (*get_pattern_func) (AST *ast,
501 typedef GVariant * (*get_value_func) (AST *ast,
502 const GVariantType *type,
504 typedef GVariant * (*get_base_value_func) (AST *ast,
505 const GVariantType *type,
507 typedef void (*free_func) (AST *ast);
511 gchar * (* get_pattern) (AST *ast,
513 GVariant * (* get_value) (AST *ast,
514 const GVariantType *type,
516 GVariant * (* get_base_value) (AST *ast,
517 const GVariantType *type,
519 void (* free) (AST *ast);
524 const ASTClass *class;
525 SourceRef source_ref;
529 ast_get_pattern (AST *ast,
532 return ast->class->get_pattern (ast, error);
536 ast_get_value (AST *ast,
537 const GVariantType *type,
540 return ast->class->get_value (ast, type, error);
546 ast->class->free (ast);
551 ast_set_error (AST *ast,
560 va_start (ap, format);
561 parser_set_error_va (error, &ast->source_ref,
562 other_ast ? & other_ast->source_ref : NULL,
569 ast_type_error (AST *ast,
570 const GVariantType *type,
575 typestr = g_variant_type_dup_string (type);
576 ast_set_error (ast, error, NULL,
577 G_VARIANT_PARSE_ERROR_TYPE_ERROR,
578 "can not parse as value of type '%s'",
586 ast_resolve (AST *ast,
593 pattern = ast_get_pattern (ast, error);
598 /* choose reasonable defaults
600 * 1) favour non-maybe values where possible
601 * 2) default type for strings is 's'
602 * 3) default type for integers is 'i'
604 for (i = 0; pattern[i]; i++)
608 ast_set_error (ast, error, NULL,
609 G_VARIANT_PARSE_ERROR_CANNOT_INFER_TYPE,
610 "unable to infer type");
630 pattern[j++] = pattern[i];
635 value = ast_get_value (ast, G_VARIANT_TYPE (pattern), error);
642 static AST *parse (TokenStream *stream,
647 ast_array_append (AST ***array,
651 if ((*n_items & (*n_items - 1)) == 0)
652 *array = g_renew (AST *, *array, *n_items ? 2 ** n_items : 1);
654 (*array)[(*n_items)++] = ast;
658 ast_array_free (AST **array,
663 for (i = 0; i < n_items; i++)
669 ast_array_get_pattern (AST **array,
676 pattern = ast_get_pattern (array[0], error);
681 for (i = 1; i < n_items; i++)
685 tmp = ast_get_pattern (array[i], error);
693 merged = pattern_coalesce (pattern, tmp);
698 /* set coalescence implies pairwise coalescence (i think).
699 * we should therefore be able to trace the failure to a single
710 /* if 'j' reaches 'i' then we failed to find the pair */
713 tmp2 = ast_get_pattern (array[j], NULL);
714 g_assert (tmp2 != NULL);
716 m = pattern_coalesce (tmp, tmp2);
722 /* we found a conflict between 'i' and 'j'.
724 * report the error. note: 'j' is first.
726 ast_set_error (array[j], error, array[i],
727 G_VARIANT_PARSE_ERROR_NO_COMMON_TYPE,
728 "unable to find a common type");
752 maybe_get_pattern (AST *ast,
755 Maybe *maybe = (Maybe *) ast;
757 if (maybe->child != NULL)
759 gchar *child_pattern;
762 child_pattern = ast_get_pattern (maybe->child, error);
764 if (child_pattern == NULL)
767 pattern = g_strdup_printf ("m%s", child_pattern);
768 g_free (child_pattern);
773 return g_strdup ("m*");
777 maybe_get_value (AST *ast,
778 const GVariantType *type,
781 Maybe *maybe = (Maybe *) ast;
784 if (!g_variant_type_is_maybe (type))
785 return ast_type_error (ast, type, error);
787 type = g_variant_type_element (type);
791 value = ast_get_value (maybe->child, type, error);
799 return g_variant_new_maybe (type, value);
803 maybe_free (AST *ast)
805 Maybe *maybe = (Maybe *) ast;
807 if (maybe->child != NULL)
808 ast_free (maybe->child);
810 g_slice_free (Maybe, maybe);
814 maybe_parse (TokenStream *stream,
818 static const ASTClass maybe_class = {
820 maybe_get_value, NULL,
826 if (token_stream_consume (stream, "just"))
828 child = parse (stream, app, error);
833 else if (!token_stream_consume (stream, "nothing"))
835 token_stream_set_error (stream, error, TRUE,
836 G_VARIANT_PARSE_ERROR_UNKNOWN_KEYWORD,
841 maybe = g_slice_new (Maybe);
842 maybe->ast.class = &maybe_class;
843 maybe->child = child;
845 return (AST *) maybe;
849 maybe_wrapper (AST *ast,
850 const GVariantType *type,
853 const GVariantType *t;
857 for (depth = 0, t = type;
858 g_variant_type_is_maybe (t);
859 depth++, t = g_variant_type_element (t));
861 value = ast->class->get_base_value (ast, t, error);
867 value = g_variant_new_maybe (NULL, value);
881 array_get_pattern (AST *ast,
884 Array *array = (Array *) ast;
888 if (array->n_children == 0)
889 return g_strdup ("Ma*");
891 pattern = ast_array_get_pattern (array->children, array->n_children, error);
896 result = g_strdup_printf ("Ma%s", pattern);
903 array_get_value (AST *ast,
904 const GVariantType *type,
907 Array *array = (Array *) ast;
908 const GVariantType *childtype;
909 GVariantBuilder builder;
912 if (!g_variant_type_is_array (type))
913 return ast_type_error (ast, type, error);
915 g_variant_builder_init (&builder, type);
916 childtype = g_variant_type_element (type);
918 for (i = 0; i < array->n_children; i++)
922 if (!(child = ast_get_value (array->children[i], childtype, error)))
924 g_variant_builder_clear (&builder);
928 g_variant_builder_add_value (&builder, child);
931 return g_variant_builder_end (&builder);
935 array_free (AST *ast)
937 Array *array = (Array *) ast;
939 ast_array_free (array->children, array->n_children);
940 g_slice_free (Array, array);
944 array_parse (TokenStream *stream,
948 static const ASTClass array_class = {
950 maybe_wrapper, array_get_value,
953 gboolean need_comma = FALSE;
956 array = g_slice_new (Array);
957 array->ast.class = &array_class;
958 array->children = NULL;
959 array->n_children = 0;
961 token_stream_assert (stream, "[");
962 while (!token_stream_consume (stream, "]"))
967 !token_stream_require (stream, ",",
968 " or ']' to follow array element",
972 child = parse (stream, app, error);
977 ast_array_append (&array->children, &array->n_children, child);
981 return (AST *) array;
984 ast_array_free (array->children, array->n_children);
985 g_slice_free (Array, array);
999 tuple_get_pattern (AST *ast,
1002 Tuple *tuple = (Tuple *) ast;
1003 gchar *result = NULL;
1007 parts = g_new (gchar *, tuple->n_children + 4);
1008 parts[tuple->n_children + 1] = (gchar *) ")";
1009 parts[tuple->n_children + 2] = NULL;
1010 parts[0] = (gchar *) "M(";
1012 for (i = 0; i < tuple->n_children; i++)
1013 if (!(parts[i + 1] = ast_get_pattern (tuple->children[i], error)))
1016 if (i == tuple->n_children)
1017 result = g_strjoinv ("", parts);
1019 /* parts[0] should not be freed */
1021 g_free (parts[i--]);
1028 tuple_get_value (AST *ast,
1029 const GVariantType *type,
1032 Tuple *tuple = (Tuple *) ast;
1033 const GVariantType *childtype;
1034 GVariantBuilder builder;
1037 if (!g_variant_type_is_tuple (type))
1038 return ast_type_error (ast, type, error);
1040 g_variant_builder_init (&builder, type);
1041 childtype = g_variant_type_first (type);
1043 for (i = 0; i < tuple->n_children; i++)
1047 if (childtype == NULL)
1049 g_variant_builder_clear (&builder);
1050 return ast_type_error (ast, type, error);
1053 if (!(child = ast_get_value (tuple->children[i], childtype, error)))
1055 g_variant_builder_clear (&builder);
1059 g_variant_builder_add_value (&builder, child);
1060 childtype = g_variant_type_next (childtype);
1063 if (childtype != NULL)
1065 g_variant_builder_clear (&builder);
1066 return ast_type_error (ast, type, error);
1069 return g_variant_builder_end (&builder);
1073 tuple_free (AST *ast)
1075 Tuple *tuple = (Tuple *) ast;
1077 ast_array_free (tuple->children, tuple->n_children);
1078 g_slice_free (Tuple, tuple);
1082 tuple_parse (TokenStream *stream,
1086 static const ASTClass tuple_class = {
1088 maybe_wrapper, tuple_get_value,
1091 gboolean need_comma = FALSE;
1092 gboolean first = TRUE;
1095 tuple = g_slice_new (Tuple);
1096 tuple->ast.class = &tuple_class;
1097 tuple->children = NULL;
1098 tuple->n_children = 0;
1100 token_stream_assert (stream, "(");
1101 while (!token_stream_consume (stream, ")"))
1106 !token_stream_require (stream, ",",
1107 " or ')' to follow tuple element",
1111 child = parse (stream, app, error);
1116 ast_array_append (&tuple->children, &tuple->n_children, child);
1118 /* the first time, we absolutely require a comma, so grab it here
1119 * and leave need_comma = FALSE so that the code above doesn't
1120 * require a second comma.
1122 * the second and remaining times, we set need_comma = TRUE.
1126 if (!token_stream_require (stream, ",",
1127 " after first tuple element", error))
1136 return (AST *) tuple;
1139 ast_array_free (tuple->children, tuple->n_children);
1140 g_slice_free (Tuple, tuple);
1153 variant_get_pattern (AST *ast,
1156 return g_strdup ("Mv");
1160 variant_get_value (AST *ast,
1161 const GVariantType *type,
1164 Variant *variant = (Variant *) ast;
1167 if (!g_variant_type_equal (type, G_VARIANT_TYPE_VARIANT))
1168 return ast_type_error (ast, type, error);
1170 child = ast_resolve (variant->value, error);
1175 return g_variant_new_variant (child);
1179 variant_free (AST *ast)
1181 Variant *variant = (Variant *) ast;
1183 ast_free (variant->value);
1184 g_slice_free (Variant, variant);
1188 variant_parse (TokenStream *stream,
1192 static const ASTClass variant_class = {
1193 variant_get_pattern,
1194 maybe_wrapper, variant_get_value,
1200 token_stream_assert (stream, "<");
1201 value = parse (stream, app, error);
1206 if (!token_stream_require (stream, ">", " to follow variant value", error))
1212 variant = g_slice_new (Variant);
1213 variant->ast.class = &variant_class;
1214 variant->value = value;
1216 return (AST *) variant;
1229 dictionary_get_pattern (AST *ast,
1232 Dictionary *dict = (Dictionary *) ast;
1233 gchar *value_pattern;
1238 if (dict->n_children == 0)
1239 return g_strdup ("Ma{**}");
1241 key_pattern = ast_array_get_pattern (dict->keys,
1242 abs (dict->n_children),
1245 if (key_pattern == NULL)
1248 /* we can not have maybe keys */
1249 if (key_pattern[0] == 'M')
1250 key_char = key_pattern[1];
1252 key_char = key_pattern[0];
1254 g_free (key_pattern);
1257 * plus undetermined number type and undetermined string type.
1259 if (!strchr ("bynqiuxthfdsogNDS", key_char))
1261 ast_set_error (ast, error, NULL,
1262 G_VARIANT_PARSE_ERROR_BASIC_TYPE_EXPECTED,
1263 "dictionary keys must have basic types");
1267 value_pattern = ast_get_pattern (dict->values[0], error);
1269 if (value_pattern == NULL)
1272 result = g_strdup_printf ("M%s{%c%s}",
1273 dict->n_children > 0 ? "a" : "",
1274 key_char, value_pattern);
1275 g_free (value_pattern);
1281 dictionary_get_value (AST *ast,
1282 const GVariantType *type,
1285 Dictionary *dict = (Dictionary *) ast;
1287 if (dict->n_children == -1)
1289 const GVariantType *subtype;
1290 GVariantBuilder builder;
1293 if (!g_variant_type_is_dict_entry (type))
1294 return ast_type_error (ast, type, error);
1296 g_variant_builder_init (&builder, type);
1298 subtype = g_variant_type_key (type);
1299 if (!(subvalue = ast_get_value (dict->keys[0], subtype, error)))
1301 g_variant_builder_clear (&builder);
1304 g_variant_builder_add_value (&builder, subvalue);
1306 subtype = g_variant_type_value (type);
1307 if (!(subvalue = ast_get_value (dict->values[0], subtype, error)))
1309 g_variant_builder_clear (&builder);
1312 g_variant_builder_add_value (&builder, subvalue);
1314 return g_variant_builder_end (&builder);
1318 const GVariantType *entry, *key, *val;
1319 GVariantBuilder builder;
1322 if (!g_variant_type_is_subtype_of (type, G_VARIANT_TYPE_DICTIONARY))
1323 return ast_type_error (ast, type, error);
1325 entry = g_variant_type_element (type);
1326 key = g_variant_type_key (entry);
1327 val = g_variant_type_value (entry);
1329 g_variant_builder_init (&builder, type);
1331 for (i = 0; i < dict->n_children; i++)
1335 g_variant_builder_open (&builder, entry);
1337 if (!(subvalue = ast_get_value (dict->keys[i], key, error)))
1339 g_variant_builder_clear (&builder);
1342 g_variant_builder_add_value (&builder, subvalue);
1344 if (!(subvalue = ast_get_value (dict->values[i], val, error)))
1346 g_variant_builder_clear (&builder);
1349 g_variant_builder_add_value (&builder, subvalue);
1350 g_variant_builder_close (&builder);
1353 return g_variant_builder_end (&builder);
1358 dictionary_free (AST *ast)
1360 Dictionary *dict = (Dictionary *) ast;
1363 if (dict->n_children > -1)
1364 n_children = dict->n_children;
1368 ast_array_free (dict->keys, n_children);
1369 ast_array_free (dict->values, n_children);
1370 g_slice_free (Dictionary, dict);
1374 dictionary_parse (TokenStream *stream,
1378 static const ASTClass dictionary_class = {
1379 dictionary_get_pattern,
1380 maybe_wrapper, dictionary_get_value,
1383 gint n_keys, n_values;
1388 dict = g_slice_new (Dictionary);
1389 dict->ast.class = &dictionary_class;
1391 dict->values = NULL;
1392 n_keys = n_values = 0;
1394 token_stream_assert (stream, "{");
1396 if (token_stream_consume (stream, "}"))
1398 dict->n_children = 0;
1399 return (AST *) dict;
1402 if ((first = parse (stream, app, error)) == NULL)
1405 ast_array_append (&dict->keys, &n_keys, first);
1407 only_one = token_stream_consume (stream, ",");
1409 !token_stream_require (stream, ":",
1410 " or ',' to follow dictionary entry key",
1414 if ((first = parse (stream, app, error)) == NULL)
1417 ast_array_append (&dict->values, &n_values, first);
1421 if (!token_stream_require (stream, "}", " at end of dictionary entry",
1425 g_assert (n_keys == 1 && n_values == 1);
1426 dict->n_children = -1;
1428 return (AST *) dict;
1431 while (!token_stream_consume (stream, "}"))
1435 if (!token_stream_require (stream, ",",
1436 " or '}' to follow dictionary entry", error))
1439 child = parse (stream, app, error);
1444 ast_array_append (&dict->keys, &n_keys, child);
1446 if (!token_stream_require (stream, ":",
1447 " to follow dictionary entry key", error))
1450 child = parse (stream, app, error);
1455 ast_array_append (&dict->values, &n_values, child);
1458 g_assert (n_keys == n_values);
1459 dict->n_children = n_keys;
1461 return (AST *) dict;
1464 ast_array_free (dict->keys, n_keys);
1465 ast_array_free (dict->values, n_values);
1466 g_slice_free (Dictionary, dict);
1478 string_get_pattern (AST *ast,
1481 return g_strdup ("MS");
1485 string_get_value (AST *ast,
1486 const GVariantType *type,
1489 String *string = (String *) ast;
1491 if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
1492 return g_variant_new_string (string->string);
1494 else if (g_variant_type_equal (type, G_VARIANT_TYPE_OBJECT_PATH))
1496 if (!g_variant_is_object_path (string->string))
1498 ast_set_error (ast, error, NULL,
1499 G_VARIANT_PARSE_ERROR_INVALID_OBJECT_PATH,
1500 "not a valid object path");
1504 return g_variant_new_object_path (string->string);
1507 else if (g_variant_type_equal (type, G_VARIANT_TYPE_SIGNATURE))
1509 if (!g_variant_is_signature (string->string))
1511 ast_set_error (ast, error, NULL,
1512 G_VARIANT_PARSE_ERROR_INVALID_SIGNATURE,
1513 "not a valid signature");
1517 return g_variant_new_signature (string->string);
1521 return ast_type_error (ast, type, error);
1525 string_free (AST *ast)
1527 String *string = (String *) ast;
1529 g_free (string->string);
1530 g_slice_free (String, string);
1534 unicode_unescape (const gchar *src,
1548 g_assert (length < sizeof (buffer));
1549 strncpy (buffer, src + *src_ofs, length);
1550 buffer[length] = '\0';
1552 value = g_ascii_strtoull (buffer, &end, 0x10);
1554 if (value == 0 || end != buffer + length)
1556 parser_set_error (error, ref, NULL,
1557 G_VARIANT_PARSE_ERROR_INVALID_CHARACTER,
1558 "invalid %d-character unicode escape", length);
1562 g_assert (value <= G_MAXUINT32);
1564 *dest_ofs += g_unichar_to_utf8 (value, dest + *dest_ofs);
1571 string_parse (TokenStream *stream,
1575 static const ASTClass string_class = {
1577 maybe_wrapper, string_get_value,
1588 token_stream_start_ref (stream, &ref);
1589 token = token_stream_get (stream);
1590 token_stream_end_ref (stream, &ref);
1591 length = strlen (token);
1594 str = g_malloc (length);
1595 g_assert (quote == '"' || quote == '\'');
1598 while (token[i] != quote)
1602 parser_set_error (error, &ref, NULL,
1603 G_VARIANT_PARSE_ERROR_UNTERMINATED_STRING_CONSTANT,
1604 "unterminated string constant");
1613 parser_set_error (error, &ref, NULL,
1614 G_VARIANT_PARSE_ERROR_UNTERMINATED_STRING_CONSTANT,
1615 "unterminated string constant");
1621 if (!unicode_unescape (token, &i, str, &j, 4, &ref, error))
1630 if (!unicode_unescape (token, &i, str, &j, 8, &ref, error))
1638 case 'a': str[j++] = '\a'; i++; continue;
1639 case 'b': str[j++] = '\b'; i++; continue;
1640 case 'f': str[j++] = '\f'; i++; continue;
1641 case 'n': str[j++] = '\n'; i++; continue;
1642 case 'r': str[j++] = '\r'; i++; continue;
1643 case 't': str[j++] = '\t'; i++; continue;
1644 case 'v': str[j++] = '\v'; i++; continue;
1645 case '\n': i++; continue;
1649 str[j++] = token[i++];
1654 string = g_slice_new (String);
1655 string->ast.class = &string_class;
1656 string->string = str;
1658 token_stream_next (stream);
1660 return (AST *) string;
1670 bytestring_get_pattern (AST *ast,
1673 return g_strdup ("May");
1677 bytestring_get_value (AST *ast,
1678 const GVariantType *type,
1681 ByteString *string = (ByteString *) ast;
1683 if (!g_variant_type_equal (type, G_VARIANT_TYPE_BYTESTRING))
1684 return ast_type_error (ast, type, error);
1686 return g_variant_new_bytestring (string->string);
1690 bytestring_free (AST *ast)
1692 ByteString *string = (ByteString *) ast;
1694 g_free (string->string);
1695 g_slice_free (ByteString, string);
1699 bytestring_parse (TokenStream *stream,
1703 static const ASTClass bytestring_class = {
1704 bytestring_get_pattern,
1705 maybe_wrapper, bytestring_get_value,
1716 token_stream_start_ref (stream, &ref);
1717 token = token_stream_get (stream);
1718 token_stream_end_ref (stream, &ref);
1719 g_assert (token[0] == 'b');
1720 length = strlen (token);
1723 str = g_malloc (length);
1724 g_assert (quote == '"' || quote == '\'');
1727 while (token[i] != quote)
1731 parser_set_error (error, &ref, NULL,
1732 G_VARIANT_PARSE_ERROR_UNTERMINATED_STRING_CONSTANT,
1733 "unterminated string constant");
1741 parser_set_error (error, &ref, NULL,
1742 G_VARIANT_PARSE_ERROR_UNTERMINATED_STRING_CONSTANT,
1743 "unterminated string constant");
1747 case '0': case '1': case '2': case '3':
1748 case '4': case '5': case '6': case '7':
1750 /* up to 3 characters */
1751 guchar val = token[i++] - '0';
1753 if ('0' <= token[i] && token[i] < '8')
1754 val = (val << 3) | (token[i++] - '0');
1756 if ('0' <= token[i] && token[i] < '8')
1757 val = (val << 3) | (token[i++] - '0');
1763 case 'a': str[j++] = '\a'; i++; continue;
1764 case 'b': str[j++] = '\b'; i++; continue;
1765 case 'f': str[j++] = '\f'; i++; continue;
1766 case 'n': str[j++] = '\n'; i++; continue;
1767 case 'r': str[j++] = '\r'; i++; continue;
1768 case 't': str[j++] = '\t'; i++; continue;
1769 case 'v': str[j++] = '\v'; i++; continue;
1770 case '\n': i++; continue;
1774 str[j++] = token[i++];
1779 string = g_slice_new (ByteString);
1780 string->ast.class = &bytestring_class;
1781 string->string = str;
1783 token_stream_next (stream);
1785 return (AST *) string;
1796 number_get_pattern (AST *ast,
1799 Number *number = (Number *) ast;
1801 if (strchr (number->token, '.') ||
1802 (!g_str_has_prefix (number->token, "0x") && strchr (number->token, 'e')) ||
1803 strstr (number->token, "inf") ||
1804 strstr (number->token, "nan"))
1805 return g_strdup ("MD");
1807 return g_strdup ("MN");
1811 number_overflow (AST *ast,
1812 const GVariantType *type,
1815 ast_set_error (ast, error, NULL,
1816 G_VARIANT_PARSE_ERROR_NUMBER_OUT_OF_RANGE,
1817 "number out of range for type '%c'",
1818 g_variant_type_peek_string (type)[0]);
1823 number_get_value (AST *ast,
1824 const GVariantType *type,
1827 Number *number = (Number *) ast;
1835 typechar = *g_variant_type_peek_string (type);
1836 token = number->token;
1838 if (typechar == 'f' || typechar == 'd')
1841 dbl_val = g_ascii_strtod (token, &end);
1842 if (dbl_val != 0.0 && errno == ERANGE)
1844 ast_set_error (ast, error, NULL,
1845 G_VARIANT_PARSE_ERROR_NUMBER_TOO_BIG,
1846 "number too big for any type");
1850 /* silence uninitialised warnings... */
1856 negative = token[0] == '-';
1857 if (token[0] == '-')
1861 abs_val = g_ascii_strtoull (token, &end, 0);
1862 if (abs_val == G_MAXUINT64 && errno == ERANGE)
1864 ast_set_error (ast, error, NULL,
1865 G_VARIANT_PARSE_ERROR_NUMBER_TOO_BIG,
1866 "integer too big for any type");
1873 /* silence uninitialised warning... */
1881 ref = ast->source_ref;
1882 ref.start += end - number->token;
1883 ref.end = ref.start + 1;
1885 parser_set_error (error, &ref, NULL,
1886 G_VARIANT_PARSE_ERROR_INVALID_CHARACTER,
1887 "invalid character in number");
1894 if (negative || abs_val > G_MAXUINT8)
1895 return number_overflow (ast, type, error);
1896 return g_variant_new_byte (abs_val);
1899 if (abs_val - negative > G_MAXINT16)
1900 return number_overflow (ast, type, error);
1901 return g_variant_new_int16 (negative ? -abs_val : abs_val);
1904 if (negative || abs_val > G_MAXUINT16)
1905 return number_overflow (ast, type, error);
1906 return g_variant_new_uint16 (abs_val);
1909 if (abs_val - negative > G_MAXINT32)
1910 return number_overflow (ast, type, error);
1911 return g_variant_new_int32 (negative ? -abs_val : abs_val);
1914 if (negative || abs_val > G_MAXUINT32)
1915 return number_overflow (ast, type, error);
1916 return g_variant_new_uint32 (abs_val);
1919 if (abs_val - negative > G_MAXINT64)
1920 return number_overflow (ast, type, error);
1921 return g_variant_new_int64 (negative ? -abs_val : abs_val);
1925 return number_overflow (ast, type, error);
1926 return g_variant_new_uint64 (abs_val);
1929 if (abs_val - negative > G_MAXINT32)
1930 return number_overflow (ast, type, error);
1931 return g_variant_new_handle (negative ? -abs_val : abs_val);
1934 return g_variant_new_float (dbl_val);
1937 return g_variant_new_double (dbl_val);
1940 return ast_type_error (ast, type, error);
1945 number_free (AST *ast)
1947 Number *number = (Number *) ast;
1949 g_free (number->token);
1950 g_slice_free (Number, number);
1954 number_parse (TokenStream *stream,
1958 static const ASTClass number_class = {
1960 maybe_wrapper, number_get_value,
1965 number = g_slice_new (Number);
1966 number->ast.class = &number_class;
1967 number->token = token_stream_get (stream);
1968 token_stream_next (stream);
1970 return (AST *) number;
1980 boolean_get_pattern (AST *ast,
1983 return g_strdup ("Mb");
1987 boolean_get_value (AST *ast,
1988 const GVariantType *type,
1991 Boolean *boolean = (Boolean *) ast;
1993 if (!g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
1994 return ast_type_error (ast, type, error);
1996 return g_variant_new_boolean (boolean->value);
2000 boolean_free (AST *ast)
2002 Boolean *boolean = (Boolean *) ast;
2004 g_slice_free (Boolean, boolean);
2008 boolean_new (gboolean value)
2010 static const ASTClass boolean_class = {
2011 boolean_get_pattern,
2012 maybe_wrapper, boolean_get_value,
2017 boolean = g_slice_new (Boolean);
2018 boolean->ast.class = &boolean_class;
2019 boolean->value = value;
2021 return (AST *) boolean;
2032 positional_get_pattern (AST *ast,
2035 Positional *positional = (Positional *) ast;
2037 return g_strdup (g_variant_get_type_string (positional->value));
2041 positional_get_value (AST *ast,
2042 const GVariantType *type,
2045 Positional *positional = (Positional *) ast;
2048 g_assert (positional->value != NULL);
2050 if G_UNLIKELY (!g_variant_is_of_type (positional->value, type))
2051 return ast_type_error (ast, type, error);
2053 /* NOTE: if _get is called more than once then
2054 * things get messed up with respect to floating refs.
2056 * fortunately, this function should only ever get called once.
2058 g_assert (positional->value != NULL);
2059 value = positional->value;
2060 positional->value = NULL;
2066 positional_free (AST *ast)
2068 Positional *positional = (Positional *) ast;
2070 /* if positional->value is set, just leave it.
2071 * memory management doesn't matter in case of programmer error.
2073 g_slice_free (Positional, positional);
2077 positional_parse (TokenStream *stream,
2081 static const ASTClass positional_class = {
2082 positional_get_pattern,
2083 positional_get_value, NULL,
2086 Positional *positional;
2087 const gchar *endptr;
2090 token = token_stream_get (stream);
2091 g_assert (token[0] == '%');
2093 positional = g_slice_new (Positional);
2094 positional->ast.class = &positional_class;
2095 positional->value = g_variant_new_va (token + 1, &endptr, app);
2097 if (*endptr || positional->value == NULL)
2099 token_stream_set_error (stream, error, TRUE,
2100 G_VARIANT_PARSE_ERROR_INVALID_FORMAT_STRING,
2101 "invalid GVariant format string");
2102 /* memory management doesn't matter in case of programmer error. */
2106 token_stream_next (stream);
2109 return (AST *) positional;
2121 typedecl_get_pattern (AST *ast,
2124 TypeDecl *decl = (TypeDecl *) ast;
2126 return g_variant_type_dup_string (decl->type);
2130 typedecl_get_value (AST *ast,
2131 const GVariantType *type,
2134 TypeDecl *decl = (TypeDecl *) ast;
2136 return ast_get_value (decl->child, type, error);
2140 typedecl_free (AST *ast)
2142 TypeDecl *decl = (TypeDecl *) ast;
2144 ast_free (decl->child);
2145 g_variant_type_free (decl->type);
2146 g_slice_free (TypeDecl, decl);
2150 typedecl_parse (TokenStream *stream,
2154 static const ASTClass typedecl_class = {
2155 typedecl_get_pattern,
2156 typedecl_get_value, NULL,
2163 if (token_stream_peek (stream, '@'))
2167 token = token_stream_get (stream);
2169 if (!g_variant_type_string_is_valid (token + 1))
2171 token_stream_set_error (stream, error, TRUE,
2172 G_VARIANT_PARSE_ERROR_INVALID_TYPE_STRING,
2173 "invalid type declaration");
2179 type = g_variant_type_new (token + 1);
2181 if (!g_variant_type_is_definite (type))
2183 token_stream_set_error (stream, error, TRUE,
2184 G_VARIANT_PARSE_ERROR_DEFINITE_TYPE_EXPECTED,
2185 "type declarations must be definite");
2186 g_variant_type_free (type);
2192 token_stream_next (stream);
2197 if (token_stream_consume (stream, "boolean"))
2198 type = g_variant_type_copy (G_VARIANT_TYPE_BOOLEAN);
2200 else if (token_stream_consume (stream, "byte"))
2201 type = g_variant_type_copy (G_VARIANT_TYPE_BYTE);
2203 else if (token_stream_consume (stream, "int16"))
2204 type = g_variant_type_copy (G_VARIANT_TYPE_INT16);
2206 else if (token_stream_consume (stream, "uint16"))
2207 type = g_variant_type_copy (G_VARIANT_TYPE_UINT16);
2209 else if (token_stream_consume (stream, "int32"))
2210 type = g_variant_type_copy (G_VARIANT_TYPE_INT32);
2212 else if (token_stream_consume (stream, "handle"))
2213 type = g_variant_type_copy (G_VARIANT_TYPE_HANDLE);
2215 else if (token_stream_consume (stream, "uint32"))
2216 type = g_variant_type_copy (G_VARIANT_TYPE_UINT32);
2218 else if (token_stream_consume (stream, "int64"))
2219 type = g_variant_type_copy (G_VARIANT_TYPE_INT64);
2221 else if (token_stream_consume (stream, "uint64"))
2222 type = g_variant_type_copy (G_VARIANT_TYPE_UINT64);
2224 else if (token_stream_consume (stream, "float"))
2225 type = g_variant_type_copy (G_VARIANT_TYPE_FLOAT);
2227 else if (token_stream_consume (stream, "double"))
2228 type = g_variant_type_copy (G_VARIANT_TYPE_DOUBLE);
2230 else if (token_stream_consume (stream, "string"))
2231 type = g_variant_type_copy (G_VARIANT_TYPE_STRING);
2233 else if (token_stream_consume (stream, "objectpath"))
2234 type = g_variant_type_copy (G_VARIANT_TYPE_OBJECT_PATH);
2236 else if (token_stream_consume (stream, "signature"))
2237 type = g_variant_type_copy (G_VARIANT_TYPE_SIGNATURE);
2241 token_stream_set_error (stream, error, TRUE,
2242 G_VARIANT_PARSE_ERROR_UNKNOWN_KEYWORD,
2248 if ((child = parse (stream, app, error)) == NULL)
2250 g_variant_type_free (type);
2254 decl = g_slice_new (TypeDecl);
2255 decl->ast.class = &typedecl_class;
2257 decl->child = child;
2259 return (AST *) decl;
2263 parse (TokenStream *stream,
2267 SourceRef source_ref;
2270 token_stream_prepare (stream);
2271 token_stream_start_ref (stream, &source_ref);
2273 if (token_stream_peek (stream, '['))
2274 result = array_parse (stream, app, error);
2276 else if (token_stream_peek (stream, '('))
2277 result = tuple_parse (stream, app, error);
2279 else if (token_stream_peek (stream, '<'))
2280 result = variant_parse (stream, app, error);
2282 else if (token_stream_peek (stream, '{'))
2283 result = dictionary_parse (stream, app, error);
2285 else if (app && token_stream_peek (stream, '%'))
2286 result = positional_parse (stream, app, error);
2288 else if (token_stream_consume (stream, "true"))
2289 result = boolean_new (TRUE);
2291 else if (token_stream_consume (stream, "false"))
2292 result = boolean_new (FALSE);
2294 else if (token_stream_is_numeric (stream) ||
2295 token_stream_peek_string (stream, "inf") ||
2296 token_stream_peek_string (stream, "nan"))
2297 result = number_parse (stream, app, error);
2299 else if (token_stream_peek (stream, 'n') ||
2300 token_stream_peek (stream, 'j'))
2301 result = maybe_parse (stream, app, error);
2303 else if (token_stream_peek (stream, '@') ||
2304 token_stream_is_keyword (stream))
2305 result = typedecl_parse (stream, app, error);
2307 else if (token_stream_peek (stream, '\'') ||
2308 token_stream_peek (stream, '"'))
2309 result = string_parse (stream, app, error);
2311 else if (token_stream_peek2 (stream, 'b', '\'') ||
2312 token_stream_peek2 (stream, 'b', '"'))
2313 result = bytestring_parse (stream, app, error);
2317 token_stream_set_error (stream, error, FALSE,
2318 G_VARIANT_PARSE_ERROR_VALUE_EXPECTED,
2325 token_stream_end_ref (stream, &source_ref);
2326 result->source_ref = source_ref;
2334 * @type: (allow-none): a #GVariantType, or %NULL
2335 * @text: a string containing a GVariant in text form
2336 * @limit: (allow-none): a pointer to the end of @text, or %NULL
2337 * @endptr: (allow-none): a location to store the end pointer, or %NULL
2338 * @error: (allow-none): a pointer to a %NULL #GError pointer, or %NULL
2340 * Parses a #GVariant from a text representation.
2342 * A single #GVariant is parsed from the content of @text.
2344 * The format is described [here][gvariant-text].
2346 * The memory at @limit will never be accessed and the parser behaves as
2347 * if the character at @limit is the nul terminator. This has the
2348 * effect of bounding @text.
2350 * If @endptr is non-%NULL then @text is permitted to contain data
2351 * following the value that this function parses and @endptr will be
2352 * updated to point to the first character past the end of the text
2353 * parsed by this function. If @endptr is %NULL and there is extra data
2354 * then an error is returned.
2356 * If @type is non-%NULL then the value will be parsed to have that
2357 * type. This may result in additional parse errors (in the case that
2358 * the parsed value doesn't fit the type) but may also result in fewer
2359 * errors (in the case that the type would have been ambiguous, such as
2360 * with empty arrays).
2362 * In the event that the parsing is successful, the resulting #GVariant
2365 * In case of any error, %NULL will be returned. If @error is non-%NULL
2366 * then it will be set to reflect the error that occurred.
2368 * Officially, the language understood by the parser is "any string
2369 * produced by g_variant_print()".
2371 * Returns: a reference to a #GVariant, or %NULL
2374 g_variant_parse (const GVariantType *type,
2377 const gchar **endptr,
2380 TokenStream stream = { 0, };
2381 GVariant *result = NULL;
2384 g_return_val_if_fail (text != NULL, NULL);
2385 g_return_val_if_fail (text == limit || text != NULL, NULL);
2387 stream.start = text;
2388 stream.stream = text;
2391 if ((ast = parse (&stream, NULL, error)))
2394 result = ast_resolve (ast, error);
2396 result = ast_get_value (ast, type, error);
2400 g_variant_ref_sink (result);
2404 while (stream.stream != limit &&
2405 g_ascii_isspace (*stream.stream))
2408 if (stream.stream != limit && *stream.stream != '\0')
2410 SourceRef ref = { stream.stream - text,
2411 stream.stream - text };
2413 parser_set_error (error, &ref, NULL,
2414 G_VARIANT_PARSE_ERROR_INPUT_NOT_AT_END,
2415 "expected end of input");
2416 g_variant_unref (result);
2422 *endptr = stream.stream;
2432 * g_variant_new_parsed_va:
2433 * @format: a text format #GVariant
2434 * @app: a pointer to a #va_list
2436 * Parses @format and returns the result.
2438 * This is the version of g_variant_new_parsed() intended to be used
2441 * The return value will be floating if it was a newly created GVariant
2442 * instance. In the case that @format simply specified the collection
2443 * of a #GVariant pointer (eg: @format was "%*") then the collected
2444 * #GVariant pointer will be returned unmodified, without adding any
2445 * additional references.
2447 * Note that the arguments in @app must be of the correct width for their types
2448 * specified in @format when collected into the #va_list. See
2449 * the [GVariant varargs documentation][gvariant-varargs].
2451 * In order to behave correctly in all cases it is necessary for the
2452 * calling function to g_variant_ref_sink() the return result before
2453 * returning control to the user that originally provided the pointer.
2454 * At this point, the caller will have their own full reference to the
2455 * result. This can also be done by adding the result to a container,
2456 * or by passing it to another g_variant_new() call.
2458 * Returns: a new, usually floating, #GVariant
2461 g_variant_new_parsed_va (const gchar *format,
2464 TokenStream stream = { 0, };
2465 GVariant *result = NULL;
2466 GError *error = NULL;
2469 g_return_val_if_fail (format != NULL, NULL);
2470 g_return_val_if_fail (app != NULL, NULL);
2472 stream.start = format;
2473 stream.stream = format;
2476 if ((ast = parse (&stream, app, &error)))
2478 result = ast_resolve (ast, &error);
2483 g_error ("g_variant_new_parsed: %s", error->message);
2486 g_error ("g_variant_new_parsed: trailing text after value");
2492 * g_variant_new_parsed:
2493 * @format: a text format #GVariant
2494 * @...: arguments as per @format
2496 * Parses @format and returns the result.
2498 * @format must be a text format #GVariant with one extension: at any
2499 * point that a value may appear in the text, a '%' character followed
2500 * by a GVariant format string (as per g_variant_new()) may appear. In
2501 * that case, the same arguments are collected from the argument list as
2502 * g_variant_new() would have collected.
2504 * Note that the arguments must be of the correct width for their types
2505 * specified in @format. This can be achieved by casting them. See
2506 * the [GVariant varargs documentation][gvariant-varargs].
2508 * Consider this simple example:
2509 * |[<!-- language="C" -->
2510 * g_variant_new_parsed ("[('one', 1), ('two', %i), (%s, 3)]", 2, "three");
2513 * In the example, the variable argument parameters are collected and
2514 * filled in as if they were part of the original string to produce the
2516 * |[<!-- language="C" -->
2517 * [('one', 1), ('two', 2), ('three', 3)]
2520 * This function is intended only to be used with @format as a string
2521 * literal. Any parse error is fatal to the calling process. If you
2522 * want to parse data from untrusted sources, use g_variant_parse().
2524 * You may not use this function to return, unmodified, a single
2525 * #GVariant pointer from the argument list. ie: @format may not solely
2526 * be anything along the lines of "%*", "%?", "\%r", or anything starting
2529 * Returns: a new floating #GVariant instance
2532 g_variant_new_parsed (const gchar *format,
2538 va_start (ap, format);
2539 result = g_variant_new_parsed_va (format, &ap);
2546 * g_variant_builder_add_parsed:
2547 * @builder: a #GVariantBuilder
2548 * @format: a text format #GVariant
2549 * @...: arguments as per @format
2551 * Adds to a #GVariantBuilder.
2553 * This call is a convenience wrapper that is exactly equivalent to
2554 * calling g_variant_new_parsed() followed by
2555 * g_variant_builder_add_value().
2557 * Note that the arguments must be of the correct width for their types
2558 * specified in @format_string. This can be achieved by casting them. See
2559 * the [GVariant varargs documentation][gvariant-varargs].
2561 * This function might be used as follows:
2563 * |[<!-- language="C" -->
2565 * make_pointless_dictionary (void)
2567 * GVariantBuilder builder;
2570 * g_variant_builder_init (&builder, G_VARIANT_TYPE_ARRAY);
2571 * g_variant_builder_add_parsed (&builder, "{'width', <%i>}", 600);
2572 * g_variant_builder_add_parsed (&builder, "{'title', <%s>}", "foo");
2573 * g_variant_builder_add_parsed (&builder, "{'transparency', <0.5>}");
2574 * return g_variant_builder_end (&builder);
2581 g_variant_builder_add_parsed (GVariantBuilder *builder,
2582 const gchar *format,
2587 va_start (ap, format);
2588 g_variant_builder_add_value (builder, g_variant_new_parsed_va (format, &ap));
2593 parse_num (const gchar *num,
2600 bignum = g_ascii_strtoll (num, &endptr, 10);
2602 if (endptr != limit)
2605 if (bignum < 0 || bignum > G_MAXINT)
2614 add_last_line (GString *err,
2617 const gchar *last_nl;
2621 /* This is an error at the end of input. If we have a file
2622 * with newlines, that's probably the empty string after the
2623 * last newline, which is not the most useful thing to show.
2625 * Instead, show the last line of non-whitespace that we have
2626 * and put the pointer at the end of it.
2628 chomped = g_strchomp (g_strdup (str));
2629 last_nl = strrchr (chomped, '\n');
2630 if (last_nl == NULL)
2635 /* Print the last line like so:
2640 g_string_append (err, " ");
2642 g_string_append (err, last_nl);
2644 g_string_append (err, "(empty input)");
2645 g_string_append (err, "\n ");
2646 for (i = 0; last_nl[i]; i++)
2647 g_string_append_c (err, ' ');
2648 g_string_append (err, "^\n");
2653 add_lines_from_range (GString *err,
2655 const gchar *start1,
2657 const gchar *start2,
2660 while (str < end1 || str < end2)
2664 nl = str + strcspn (str, "\n");
2666 if ((start1 < nl && str < end1) || (start2 < nl && str < end2))
2670 /* We're going to print this line */
2671 g_string_append (err, " ");
2672 g_string_append_len (err, str, nl - str);
2673 g_string_append (err, "\n ");
2675 /* And add underlines... */
2676 for (s = str; s < nl; s++)
2678 if ((start1 <= s && s < end1) || (start2 <= s && s < end2))
2679 g_string_append_c (err, '^');
2681 g_string_append_c (err, ' ');
2683 g_string_append_c (err, '\n');
2694 * g_variant_parse_error_print_context:
2695 * @error: a #GError from the #GVariantParseError domain
2696 * @source_str: the string that was given to the parser
2698 * Pretty-prints a message showing the context of a #GVariant parse
2699 * error within the string for which parsing was attempted.
2701 * The resulting string is suitable for output to the console or other
2702 * monospace media where newlines are treated in the usual way.
2704 * The message will typically look something like one of the following:
2707 * unterminated string constant:
2715 * unable to find a common type:
2720 * The format of the message may change in a future version.
2722 * @error must have come from a failed attempt to g_variant_parse() and
2723 * @source_str must be exactly the same string that caused the error.
2724 * If @source_str was not nul-terminated when you passed it to
2725 * g_variant_parse() then you must add nul termination before using this
2728 * Returns: (transfer full): the printed message
2733 g_variant_parse_error_print_context (GError *error,
2734 const gchar *source_str)
2736 const gchar *colon, *dash, *comma;
2737 gboolean success = FALSE;
2740 g_return_val_if_fail (error->domain == G_VARIANT_PARSE_ERROR, FALSE);
2742 /* We can only have a limited number of possible types of ranges
2743 * emitted from the parser:
2745 * - a: -- usually errors from the tokeniser (eof, invalid char, etc.)
2746 * - a-b: -- usually errors from handling one single token
2747 * - a-b,c-d: -- errors involving two tokens (ie: type inferencing)
2749 * We never see, for example "a,c".
2752 colon = strchr (error->message, ':');
2753 dash = strchr (error->message, '-');
2754 comma = strchr (error->message, ',');
2759 err = g_string_new (colon + 1);
2760 g_string_append (err, ":\n");
2762 if (dash == NULL || colon < dash)
2766 /* we have a single point */
2767 if (!parse_num (error->message, colon, &point))
2770 if (point >= strlen (source_str))
2771 /* the error is at the end of the input */
2772 add_last_line (err, source_str);
2774 /* otherwise just treat it as a error at a thin range */
2775 add_lines_from_range (err, source_str, source_str + point, source_str + point + 1, NULL, NULL);
2779 /* We have one or two ranges... */
2780 if (comma && comma < colon)
2782 gint start1, end1, start2, end2;
2786 dash2 = strchr (comma, '-');
2788 if (!parse_num (error->message, dash, &start1) || !parse_num (dash + 1, comma, &end1) ||
2789 !parse_num (comma + 1, dash2, &start2) || !parse_num (dash2 + 1, colon, &end2))
2792 add_lines_from_range (err, source_str,
2793 source_str + start1, source_str + end1,
2794 source_str + start2, source_str + end2);
2801 if (!parse_num (error->message, dash, &start) || !parse_num (dash + 1, colon, &end))
2804 add_lines_from_range (err, source_str, source_str + start, source_str + end, NULL, NULL);
2811 return g_string_free (err, !success);