2 * Simple pattern matching
5 * Gonzalo Paniagua Javier (gonzalo@novell.com
7 * (C) 2006 Novell, Inc.
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46 struct _GPatternSpec {
51 compile_pattern (const gchar *pattern)
67 str = g_string_new ("");
68 for (i = 0, len = strlen (pattern); i < len; i++) {
70 if (c == '*' || c == '?') {
72 data = g_new0 (PData, 1);
73 data->type = MATCH_LITERAL;
74 data->str = g_string_free (str, FALSE);
75 list = g_slist_append (list, data);
76 str = g_string_new ("");
79 if (last == MATCH_ANYTHING && c == '*')
82 data = g_new0 (PData, 1);
83 data->type = (c == '*') ? MATCH_ANYTHING : MATCH_ANYCHAR;
84 list = g_slist_append (list, data);
87 g_string_append_c (str, c);
92 if (last == MATCH_ANYTHING && str->len == 0) {
93 data->type = MATCH_ANYTHING_END;
95 } else if (str->len > 0) {
96 data = g_new0 (PData, 1);
97 data->type = MATCH_LITERAL;
100 list = g_slist_append (list, data);
102 g_string_free (str, free_str);
108 print_pattern (gpointer data, gpointer user_data)
110 PData *d = (PData *) data;
112 printf ("Type: %s", d->type == MATCH_LITERAL ? "literal" : d->type == MATCH_ANYCHAR ? "any char" : "anything");
113 if (d->type == MATCH_LITERAL)
114 printf (" String: %s", d->str);
120 g_pattern_spec_new (const gchar *pattern)
124 g_return_val_if_fail (pattern != NULL, NULL);
125 spec = g_new0 (GPatternSpec, 1);
127 spec->pattern = compile_pattern (pattern);
129 g_slist_foreach (spec->pattern, print_pattern, NULL);
137 free_pdata (gpointer data, gpointer user_data)
139 PData *d = (PData *) data;
147 g_pattern_spec_free (GPatternSpec *pspec)
150 g_slist_foreach (pspec->pattern, free_pdata, NULL);
151 g_slist_free (pspec->pattern);
152 pspec->pattern = NULL;
158 match_string (GSList *list, const gchar *str, gint idx, gint max)
162 while (list && idx < max) {
163 PData *data = (PData *) list->data;
165 if (data->type == MATCH_ANYTHING_END)
168 if (data->type == MATCH_LITERAL) {
169 len = strlen (data->str);
170 if (strncmp (&str [idx], data->str, len) != 0)
176 * When recursing, we need this to avoid returning FALSE
177 * because 'list' will not be NULL
179 data = (PData *) list->data;
180 if (data->type == MATCH_ANYTHING_END)
183 } else if (data->type == MATCH_ANYCHAR) {
186 } else if (data->type == MATCH_ANYTHING) {
188 if (match_string (list->next, str, idx++, max))
193 g_assert_not_reached ();
197 return (list == NULL && idx >= max);
200 g_pattern_match_string (GPatternSpec *pspec, const gchar *string)
202 g_return_val_if_fail (pspec != NULL, FALSE);
203 g_return_val_if_fail (string != NULL, FALSE);
205 if (pspec->pattern == NULL)
207 return match_string (pspec->pattern, string, 0, strlen (string));