#include "stream.h"
+#include <string.h>
/* Global current stream */
static strid_t current_stream = NULL;
+/* List of streams currently in existence */
static GList *stream_list = NULL;
+/**
+ * glk_stream_iterate:
+ * @str: A stream, or #NULL.
+ * @rockptr: Return location for the next window's rock, or #NULL.
+ *
+ * Iterates over the list of streams; if @str is #NULL, it returns the first
+ * stream, otherwise the next stream after @str. If there are no more, it
+ * returns #NULL. The stream's rock is stored in @rockptr. If you don't want
+ * the rocks to be returned, you may set @rockptr to #NULL.
+ *
+ * The order in which streams are returned is arbitrary. The order may change
+ * every time you create or destroy a stream, invalidating the iteration.
+ *
+ * Returns: the next stream, or #NULL if there are no more.
+ */
strid_t
-window_stream_new(winid_t window)
+glk_stream_iterate(strid_t str, glui32 *rockptr)
+{
+ GList *retnode;
+
+ if(str == NULL)
+ retnode = stream_list;
+ else
+ retnode = str->stream_list->next;
+ strid_t retval = retnode? (strid_t)retnode->data : NULL;
+
+ /* Store the stream's rock in rockptr */
+ if(retval && rockptr)
+ *rockptr = glk_stream_get_rock(retval);
+
+ return retval;
+}
+
+/**
+ * glk_stream_get_rock:
+ * @str: A stream.
+ *
+ * Returns the stream @str's rock value.
+ *
+ * Returns: A rock value.
+ */
+glui32
+glk_stream_get_rock(strid_t str)
{
+ g_return_val_if_fail(str != NULL, 0);
+ return str->rock;
+}
+/* Internal function: create a window stream to go with window. */
+strid_t
+window_stream_new(winid_t window)
+{
+ /* Create stream and connect it to window */
strid_t s = g_new0(struct glk_stream_struct, 1);
s->file_mode = filemode_Write;
s->stream_type = STREAM_TYPE_WINDOW;
s->window = window;
-
+ /* Add it to the global stream list */
stream_list = g_list_prepend(stream_list, s);
s->stream_list = stream_list;
return s;
}
+/**
+ * glk_stream_set_current:
+ * @str: An output stream, or NULL.
+ *
+ * Sets the current stream to @str, or to nothing if @str is #NULL.
+ */
void
-glk_stream_set_current(strid_t stream)
+glk_stream_set_current(strid_t str)
{
- if(stream->file_mode != filemode_Write)
+ if(str != NULL && str->file_mode != filemode_Write)
{
- g_warning("glk_stream_set_current: Cannot set current stream to non output stream");
+ g_warning("glk_stream_set_current: "
+ "Cannot set current stream to non output stream");
return;
}
- current_stream = stream;
+ current_stream = str;
+}
+
+/* Internal function: change illegal (control) characters in a string to a
+placeholder character. Must free returned string afterwards. */
+static gchar *
+remove_latin1_control_characters(gchar *s)
+{
+ gchar *retval = g_strdup(s);
+ unsigned char *ptr;
+ for(ptr = (unsigned char *)retval; *ptr != '\0'; ptr++)
+ if( (*ptr < 32 && *ptr != 10) || (*ptr >= 127 && *ptr <= 159) )
+ *ptr = '?';
+ /* Our placeholder character is '?'; other options are possible,
+ like printing "0x7F" or something */
+ return retval;
}
+/**
+ * glk_put_string:
+ * @s: A null-terminated string in Latin-1 encoding.
+ *
+ * Prints @s to the current stream.
+ */
void
glk_put_string(char *s)
{
+ /* Illegal to print to the current stream if it is NULL */
+ g_return_if_fail(current_stream != NULL);
+
GError *error = NULL;
- gchar *utf8;
+ gchar *canonical, *utf8;
switch(current_stream->stream_type)
{
case STREAM_TYPE_WINDOW:
- utf8 = g_convert(s, -1, "UTF-8", "ISO-8859-1", NULL, NULL, &error);
-
+ canonical = remove_latin1_control_characters(s);
+ utf8 = g_convert(canonical, -1, "UTF-8", "ISO-8859-1", NULL, NULL,
+ &error);
+ g_free(canonical);
+
if(utf8 == NULL)
{
- g_warning("glk_put_string: Error during latin1->utf8 conversion: %s", error->message);
+ g_warning("glk_put_string: "
+ "Error during latin1->utf8 conversion: %s",
+ error->message);
g_error_free(error);
+ return;
}
- GtkTextBuffer *buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(current_stream->window->widget) );
-
- GtkTextIter iter;
- gtk_text_buffer_get_end_iter(buffer, &iter);
+ /* Each window type has a different way of printing to it */
+ switch(current_stream->window->window_type)
+ {
+ /* Printing to a these windows' streams does nothing */
+ case wintype_Blank:
+ case wintype_Pair:
+ case wintype_Graphics:
+ current_stream->write_count += strlen(s);
+ break;
+ /* Text buffer window */
+ case wintype_TextBuffer:
+ {
+ GtkTextBuffer *buffer = gtk_text_view_get_buffer(
+ GTK_TEXT_VIEW(current_stream->window->widget) );
- gtk_text_buffer_insert(buffer, &iter, utf8, -1);
+ GtkTextIter iter;
+ gtk_text_buffer_get_end_iter(buffer, &iter);
+ gtk_text_buffer_insert(buffer, &iter, utf8, -1);
+ }
+ current_stream->write_count += strlen(s);
+ break;
+ default:
+ g_warning("glk_put_string: "
+ "Writing to this kind of window unsupported.");
+ }
+
g_free(utf8);
break;
default:
- g_warning("glk_put_string: Writing to this kind of stream unsupported.");
+ g_warning("glk_put_string: "
+ "Writing to this kind of stream unsupported.");
}
}
projects / rodin / chimara.git / blobdiff