return result;
}
+
+void
+buffer_grow (struct buffer *buffer, const char *data, size_t size)
+{
+ char *new_buffer;
+ size_t new_buffer_size;
+
+ if (size == 0)
+ return;
+
+ new_buffer_size = buffer->buffer_size;
+
+ if (new_buffer_size == 0)
+ new_buffer_size = 1;
+
+ while (buffer->used_size + size > new_buffer_size)
+ new_buffer_size *= 2;
+ new_buffer = realloc (buffer->buffer, new_buffer_size);
+ if (!new_buffer)
+ abort ();
+ memcpy (new_buffer + buffer->used_size, data, size);
+ buffer->buffer = new_buffer;
+ buffer->buffer_size = new_buffer_size;
+ buffer->used_size += size;
+}
+
+void
+buffer_free (struct buffer *buffer)
+{
+ if (!buffer)
+ return;
+
+ free (buffer->buffer);
+ buffer->buffer = NULL;
+ buffer->buffer_size = 0;
+ buffer->used_size = 0;
+}
+
+void
+buffer_init (struct buffer *buffer)
+{
+ memset (buffer, 0, sizeof (*buffer));
+}
+
+char*
+buffer_finish (struct buffer *buffer)
+{
+ char *ret = buffer->buffer;
+ buffer->buffer = NULL;
+ buffer->buffer_size = 0;
+ buffer->used_size = 0;
+ return ret;
+}
+
+void
+buffer_xml_printf (struct buffer *buffer, const char *format, ...)
+{
+ va_list ap;
+ const char *f;
+ const char *prev;
+ int percent = 0;
+
+ va_start (ap, format);
+
+ prev = format;
+ for (f = format; *f; f++)
+ {
+ if (percent)
+ {
+ switch (*f)
+ {
+ case 's':
+ {
+ char *p;
+ char *a = va_arg (ap, char *);
+ buffer_grow (buffer, prev, f - prev - 1);
+ p = xml_escape_text (a);
+ buffer_grow_str (buffer, p);
+ free (p);
+ prev = f + 1;
+ }
+ break;
+ }
+ percent = 0;
+ }
+ else if (*f == '%')
+ percent = 1;
+ }
+
+ buffer_grow_str (buffer, prev);
+ va_end (ap);
+}