1 #include <string.h>
2 #include <glib.h>
4 // FIXME: kill this ugliness when we have a proper CSS parser
6 // Functions as per 4.3.4 of CSS 2.1
7 // http://www.w3.org/TR/CSS21/syndata.html#uri
8 gchar *extract_uri(gchar const *s)
9 {
10 if (!s)
11 return NULL;
13 gchar* result = NULL;
14 gchar const *sb = s;
15 if ( strlen(sb) < 4 || strncmp(sb, "url", 3) != 0 ) {
16 return NULL;
17 }
19 sb += 3;
21 // This first whitespace technically is not allowed.
22 // Just left in for now for legacy behavior.
23 while ( ( *sb == ' ' ) ||
24 ( *sb == '\t' ) )
25 {
26 sb++;
27 }
29 if ( *sb == '(' ) {
30 sb++;
31 while ( ( *sb == ' ' ) ||
32 ( *sb == '\t' ) )
33 {
34 sb++;
35 }
37 gchar delim = ')';
38 if ( (*sb == '\'' || *sb == '"') ) {
39 delim = *sb;
40 sb++;
41 }
42 gchar const* se = sb + 1;
43 while ( *se && (*se != delim) ) {
44 se++;
45 }
47 // we found the delimiter
48 if ( *se ) {
49 if ( delim == ')' ) {
50 // back up for any trailing whitespace
51 se--;
52 while ( ( se[-1] == ' ' ) ||
53 ( se[-1] == '\t' ) )
54 {
55 se--;
56 }
57 result = g_strndup(sb, se - sb + 1);
58 } else {
59 gchar const* tail = se + 1;
60 while ( ( *tail == ' ' ) ||
61 ( *tail == '\t' ) )
62 {
63 tail++;
64 }
65 if ( *tail == ')' ) {
66 result = g_strndup(sb, se - sb);
67 }
68 }
69 }
70 }
72 return result;
73 }
75 /*
76 Local Variables:
77 mode:c++
78 c-file-style:"stroustrup"
79 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
80 indent-tabs-mode:nil
81 fill-column:99
82 End:
83 */
84 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :