+static int buffer_get_field (char **buffer_ret, /* {{{ */
+ size_t *buffer_size_ret, char **field_ret)
+{
+ char *buffer;
+ size_t buffer_pos;
+ size_t buffer_size;
+ char *field;
+ size_t field_size;
+ int status;
+
+ buffer = *buffer_ret;
+ buffer_pos = 0;
+ buffer_size = *buffer_size_ret;
+ field = *buffer_ret;
+ field_size = 0;
+
+ /* This is ensured by `handle_request'. */
+ assert (buffer[buffer_size - 1] == ' ');
+
+ status = -1;
+ while (buffer_pos < buffer_size)
+ {
+ /* Check for end-of-field or end-of-buffer */
+ if (buffer[buffer_pos] == ' ')
+ {
+ field[field_size] = 0;
+ field_size++;
+ buffer_pos++;
+ status = 0;
+ break;
+ }
+ /* Handle escaped characters. */
+ else if (buffer[buffer_pos] == '\\')
+ {
+ if (buffer_pos >= (buffer_size - 1))
+ break;
+ buffer_pos++;
+ field[field_size] = buffer[buffer_pos];
+ field_size++;
+ buffer_pos++;
+ }
+ /* Normal operation */
+ else
+ {
+ field[field_size] = buffer[buffer_pos];
+ field_size++;
+ buffer_pos++;
+ }
+ } /* while (buffer_pos < buffer_size) */
+
+ if (status != 0)
+ return (status);
+
+ *buffer_ret = buffer + buffer_pos;
+ *buffer_size_ret = buffer_size - buffer_pos;
+ *field_ret = field;
+
+ return (0);
+} /* }}} int buffer_get_field */
+