+/*
+ * This is a mini RFC2047 decoder.
+ * It only handles strings encoded from UTF-8 as Quoted-printable.
+ */
+void mini_2047_decode(char *s) {
+ if (!s) return;
+
+ char *qstart = strstr(s, "=?UTF-8?Q?");
+ if (!qstart) return;
+
+ char *qend = strstr(s, "?=");
+ if (!qend) return;
+
+ if (qend <= qstart) return;
+
+ strcpy(qstart, &qstart[10]);
+ qend -= 10;
+
+ char *p = qstart;
+ while (p < qend) {
+
+ if (p[0] == '=') {
+
+ char ch[3];
+ ch[0] = p[1];
+ ch[1] = p[2];
+ ch[2] = p[3];
+ int c;
+ sscanf(ch, "%02x", &c);
+ p[0] = c;
+ strcpy(&p[1], &p[3]);
+ qend -= 2;
+ }
+
+ if (p[0] == '_') {
+ p[0] = ' ';
+ }
+
+ ++p;
+ }
+
+ strcpy(qend, &qend[2]);
+}
+