+int fromHex(char c)
+{
+ if (c >= '0' && c <= '9')
+ return c-'0';
+ if (c >= 'a' && c <= 'f')
+ return c-'a'+10;
+ if (c >= 'A' && c <= 'F')
+ return c-'A'+10;
+ return -1;
+}
+
+char *escape_char(char c, char *buf, bool str)
+{
+ buf = buf == NULL ? safe_malloc(10) : buf;
+ switch (c) {
+ case '\0': strcpy(buf, "\\0"); break;
+ case '\a': strcpy(buf, "\\a"); break;
+ case '\b': strcpy(buf, "\\b"); break;
+ case '\t': strcpy(buf, "\\t"); break;
+ case '\n': strcpy(buf, "\\n"); break;
+ case '\v': strcpy(buf, "\\v"); break;
+ case '\f': strcpy(buf, "\\f"); break;
+ case '\r': strcpy(buf, "\\r"); break;
+ case '\'': strcpy(buf, str ? "'" : "\\'"); break;
+ case '"': strcpy(buf, str ? "\\\"" : "\""); break;
+ default:
+ if (c >= ' ' && c < 127) {
+ sprintf(buf, "%c", c);
+ } else {
+ sprintf(buf, "\\x%02x", (unsigned char)c);
+ }
+ break;
+ }
+ return buf;
+}
+
+char *unescape_char(char *c)
+{
+ //escape
+ if (c[0] == '\\') {
+ switch (c[1]) {
+ case '0': c[1] = '\0'; break;
+ case '\'': c[1] = '\''; break;
+ case '\\': c[1] = '\\'; break;
+ case '"': c[1] = '"'; break;
+ case 'a': c[1] = '\a'; break;
+ case 'b': c[1] = '\b'; break;
+ case 't': c[1] = '\t'; break;
+ case 'v': c[1] = '\v'; break;
+ case 'f': c[1] = '\f'; break;
+ case 'r': c[1] = '\r'; break;
+ case 'x': c[3] = (fromHex(c[2])<<4)+fromHex(c[3]); c+=2; break;
+ }
+ c++;
+ }
+ return c;
+}
+
+char *trimquotes(char *c)
+{
+ char *r = c+1;
+ r[strlen(r)-1] = '\0';
+ return r;
+}
+