2 * Simple pattern matching
5 * Gonzalo Paniagua Javier (gonzalo@novell.com
7 * (C) 2006 Novell, Inc.
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49 struct _GPatternSpec {
54 compile_pattern (const gchar *pattern)
60 MatchType last = MATCH_INVALID;
70 str = g_string_new ("");
71 for (i = 0, len = strlen (pattern); i < len; i++) {
73 if (c == '*' || c == '?') {
75 data = g_new0 (PData, 1);
76 data->type = MATCH_LITERAL;
77 data->str = g_string_free (str, FALSE);
78 list = g_slist_append (list, data);
79 str = g_string_new ("");
82 if (last == MATCH_ANYTHING && c == '*')
85 data = g_new0 (PData, 1);
86 data->type = (c == '*') ? MATCH_ANYTHING : MATCH_ANYCHAR;
87 list = g_slist_append (list, data);
90 g_string_append_c (str, c);
95 if (last == MATCH_ANYTHING && str->len == 0) {
96 data->type = MATCH_ANYTHING_END;
98 } else if (str->len > 0) {
99 data = g_new0 (PData, 1);
100 data->type = MATCH_LITERAL;
101 data->str = str->str;
103 list = g_slist_append (list, data);
105 g_string_free (str, free_str);
111 print_pattern (gpointer data, gpointer user_data)
113 PData *d = (PData *) data;
115 printf ("Type: %s", d->type == MATCH_LITERAL ? "literal" : d->type == MATCH_ANYCHAR ? "any char" : "anything");
116 if (d->type == MATCH_LITERAL)
117 printf (" String: %s", d->str);
123 g_pattern_spec_new (const gchar *pattern)
127 g_return_val_if_fail (pattern != NULL, NULL);
128 spec = g_new0 (GPatternSpec, 1);
130 spec->pattern = compile_pattern (pattern);
132 g_slist_foreach (spec->pattern, print_pattern, NULL);
140 free_pdata (gpointer data, gpointer user_data)
142 PData *d = (PData *) data;
150 g_pattern_spec_free (GPatternSpec *pspec)
153 g_slist_foreach (pspec->pattern, free_pdata, NULL);
154 g_slist_free (pspec->pattern);
155 pspec->pattern = NULL;
161 match_string (GSList *list, const gchar *str, size_t idx, size_t max)
165 while (list && idx < max) {
166 PData *data = (PData *) list->data;
168 if (data->type == MATCH_ANYTHING_END)
171 if (data->type == MATCH_LITERAL) {
172 len = strlen (data->str);
173 if (strncmp (&str [idx], data->str, len) != 0)
179 * When recursing, we need this to avoid returning FALSE
180 * because 'list' will not be NULL
182 data = (PData *) list->data;
183 if (data->type == MATCH_ANYTHING_END)
186 } else if (data->type == MATCH_ANYCHAR) {
189 } else if (data->type == MATCH_ANYTHING) {
191 if (match_string (list->next, str, idx++, max))
196 g_assert_not_reached ();
200 return (list == NULL && idx >= max);
203 g_pattern_match_string (GPatternSpec *pspec, const gchar *string)
205 g_return_val_if_fail (pspec != NULL, FALSE);
206 g_return_val_if_fail (string != NULL, FALSE);
208 if (pspec->pattern == NULL)
210 return match_string (pspec->pattern, string, 0, strlen (string));