#include "stream.h"
-#include <string.h>
+#include "fileref.h"
+#include "magic.h"
+#include <errno.h>
+#include <stdio.h>
+#include <glib.h>
+#include <glib/gstdio.h>
-/* Global current stream */
-static strid_t current_stream = NULL;
-/* List of streams currently in existence */
-static GList *stream_list = NULL;
+#include "chimara-glk-private.h"
+extern ChimaraGlkPrivate *glk_data;
+
+/* Internal function: create a stream with a specified rock value */
+static strid_t
+stream_new_common(glui32 rock, glui32 fmode, enum StreamType type)
+{
+ strid_t str = g_new0(struct glk_stream_struct, 1);
+ str->magic = MAGIC_STREAM;
+ str->rock = rock;
+ str->file_mode = fmode;
+ str->type = type;
+
+ /* Add it to the global stream list */
+ glk_data->stream_list = g_list_prepend(glk_data->stream_list, str);
+ str->stream_list = glk_data->stream_list;
+
+ return str;
+}
+
+/* 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 str = stream_new_common(0, filemode_Write, STREAM_TYPE_WINDOW);
+ str->window = window;
+ str->style = "normal";
+ return str;
+}
/**
* glk_stream_iterate:
- * @str: A stream, or #NULL.
- * @rockptr: Return location for the next window's rock, or #NULL.
+ * @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.
+ * Iterates through all the existing streams. See <link
+ * linkend="chimara-Iterating-Through-Opaque-Objects">Iterating Through Opaque
+ * Objects</link>.
*
- * 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.
+ * Returns: the next stream, or %NULL if there are no more.
*/
strid_t
glk_stream_iterate(strid_t str, glui32 *rockptr)
{
+ VALID_STREAM_OR_NULL(str, return NULL);
+
GList *retnode;
if(str == NULL)
- retnode = stream_list;
+ retnode = glk_data->stream_list;
else
retnode = str->stream_list->next;
strid_t retval = retnode? (strid_t)retnode->data : NULL;
* glk_stream_get_rock:
* @str: A stream.
*
- * Returns the stream @str's rock value.
+ * Retrieves the stream @str's rock value. See <link
+ * linkend="chimara-Rocks">Rocks</link>.
*
* Returns: A rock value.
*/
glui32
glk_stream_get_rock(strid_t str)
{
- g_return_val_if_fail(str != NULL, 0);
+ VALID_STREAM(str, return 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.
+ * @str: An output stream, or %NULL.
*
- * Sets the current stream to @str, or to nothing if @str is #NULL.
+ * Sets the current stream to @str, which must be an output stream. You may set
+ * the current stream to %NULL, which means the current stream is not set to
+ * anything.
*/
void
glk_stream_set_current(strid_t str)
{
- if(str != NULL && str->file_mode != filemode_Write)
+ VALID_STREAM_OR_NULL(str, return);
+
+ if(str != NULL && str->file_mode == filemode_Read)
{
- g_warning("glk_stream_set_current: "
- "Cannot set current stream to non output stream");
+ ILLEGAL("Cannot set current stream to non output stream");
return;
}
- current_stream = str;
+ glk_data->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)
+/**
+ * glk_stream_get_current:
+ *
+ * Returns the current stream, or %NULL if there is none.
+ *
+ * Returns: A stream, or %NULL.
+ */
+strid_t
+glk_stream_get_current()
{
- 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;
+ return glk_data->current_stream;
+}
+
+/**
+ * glk_put_char:
+ * @ch: A character in Latin-1 encoding.
+ *
+ * Prints one character to the current stream. As with all basic functions, the
+ * character is assumed to be in the Latin-1 character encoding. See <link
+ * linkend="chimara-Character-Encoding">Character Encoding</link>.
+ */
+void
+glk_put_char(unsigned char ch)
+{
+ VALID_STREAM(glk_data->current_stream, return);
+ glk_put_char_stream(glk_data->current_stream, ch);
+}
+
+/**
+ * glk_put_char_uni:
+ * @ch: A Unicode code point.
+ *
+ * Prints one character to the current stream. The character is assumed to be a
+ * Unicode code point. See <link linkend="chimara-Character-Encoding">Character
+ * Encoding</link>.
+ */
+void
+glk_put_char_uni(glui32 ch)
+{
+ VALID_STREAM(glk_data->current_stream, return);
+ glk_put_char_stream_uni(glk_data->current_stream, ch);
}
/**
* glk_put_string:
* @s: A null-terminated string in Latin-1 encoding.
*
- * Prints @s to the current stream.
+ * Prints a null-terminated string to the current stream. It is exactly
+ * equivalent to
+ * |[
+ * for (ptr = @s; *ptr; ptr++)
+ * #glk_put_char(*ptr);
+ * ]|
+ * However, it may be more efficient.
*/
void
glk_put_string(char *s)
{
- /* Illegal to print to the current stream if it is NULL */
- g_return_if_fail(current_stream != NULL);
+ VALID_STREAM(glk_data->current_stream, return);
+ glk_put_string_stream(glk_data->current_stream, s);
+}
+
+/**
+ * glk_put_string_uni:
+ * @s: A zero-terminated string of Unicode code points.
+ *
+ * Prints a string of Unicode characters to the current stream. It is equivalent
+ * to a series of glk_put_char_uni() calls. A string ends on a #glui32 whose
+ * value is 0.
+ */
+void
+glk_put_string_uni(glui32 *s)
+{
+ VALID_STREAM(glk_data->current_stream, return);
+ glk_put_string_stream_uni(glk_data->current_stream, s);
+}
+
+/**
+ * glk_put_buffer:
+ * @buf: An array of characters in Latin-1 encoding.
+ * @len: Length of @buf.
+ *
+ * Prints a block of characters to the current stream. It is exactly equivalent
+ * to:
+ * |[
+ * for (i = 0; i < @len; i++)
+ * #glk_put_char(@buf[i]);
+ * ]|
+ * However, it may be more efficient.
+ */
+void
+glk_put_buffer(char *buf, glui32 len)
+{
+ VALID_STREAM(glk_data->current_stream, return);
+ glk_put_buffer_stream(glk_data->current_stream, buf, len);
+}
+
+/**
+ * glk_put_buffer_uni:
+ * @buf: An array of Unicode code points.
+ * @len: Length of @buf.
+ *
+ * Prints a block of Unicode characters to the current stream. It is equivalent
+ * to a series of glk_put_char_uni() calls.
+ */
+void
+glk_put_buffer_uni(glui32 *buf, glui32 len)
+{
+ VALID_STREAM(glk_data->current_stream, return);
+ glk_put_buffer_stream_uni(glk_data->current_stream, buf, len);
+}
+
+/**
+ * glk_stream_open_memory:
+ * @buf: An allocated buffer, or %NULL.
+ * @buflen: Length of @buf.
+ * @fmode: Mode in which the buffer will be opened. Must be one of
+ * #filemode_Read, #filemode_Write, or #filemode_ReadWrite.
+ * @rock: The new stream's rock value.
+ *
+ * Opens a stream which reads from or writes to a space in memory. @buf points
+ * to the buffer where output will be read from or written to. @buflen is the
+ * length of the buffer.
+ *
+ * Unicode values (characters greater than 255) cannot be written to the buffer.
+ * If you try, they will be stored as 0x3F (<code>"?"</code>) characters.
+ *
+ * Returns: the new stream, or %NULL on error.
+ */
+strid_t
+glk_stream_open_memory(char *buf, glui32 buflen, glui32 fmode, glui32 rock)
+{
+ g_return_val_if_fail(fmode != filemode_WriteAppend, NULL);
- GError *error = NULL;
- gchar *canonical, *utf8;
+ strid_t str = stream_new_common(rock, fmode, STREAM_TYPE_MEMORY);
+ str->buffer = buf;
+ str->mark = 0;
+ str->buflen = buflen;
+ str->unicode = FALSE;
+ return str;
+}
- switch(current_stream->stream_type)
+/**
+ * glk_stream_open_memory_uni:
+ * @buf: An allocated buffer, or %NULL.
+ * @buflen: Length of @buf.
+ * @fmode: Mode in which the buffer will be opened. Must be one of
+ * #filemode_Read, #filemode_Write, or #filemode_ReadWrite.
+ * @rock: The new stream's rock value.
+ *
+ * Works just like glk_stream_open_memory(), except that the buffer is an array
+ * of 32-bit words, instead of bytes. This allows you to write and read any
+ * Unicode character. The @buflen is the number of words, not the number of
+ * bytes.
+ *
+ * Returns: the new stream, or %NULL on error.
+ */
+strid_t
+glk_stream_open_memory_uni(glui32 *buf, glui32 buflen, glui32 fmode, glui32 rock)
+{
+ g_return_val_if_fail(fmode != filemode_WriteAppend, NULL);
+
+ strid_t str = stream_new_common(rock, fmode, STREAM_TYPE_MEMORY);
+ str->ubuffer = buf;
+ str->mark = 0;
+ str->buflen = buflen;
+ str->unicode = TRUE;
+ return str;
+}
+
+/* Internal function: create a stream using the given parameters. */
+static strid_t
+file_stream_new(frefid_t fileref, glui32 fmode, glui32 rock, gboolean unicode)
+{
+ VALID_FILEREF(fileref, return NULL);
+
+ gchar *modestr;
+ /* Binary mode is 0x000, text mode 0x100 */
+ gboolean binary = !(fileref->usage & fileusage_TextMode);
+ switch(fmode)
{
- case STREAM_TYPE_WINDOW:
- 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_error_free(error);
- return;
+ case filemode_Read:
+ if(!g_file_test(fileref->filename, G_FILE_TEST_EXISTS)) {
+ ILLEGAL_PARAM("Tried to open a nonexistent file, '%s', in read mode", fileref->filename);
+ return NULL;
}
-
- /* 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) );
-
- 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.");
+ modestr = g_strdup(binary? "rb" : "r");
+ break;
+ case filemode_Write:
+ modestr = g_strdup(binary? "wb" : "w");
+ break;
+ case filemode_WriteAppend:
+ modestr = g_strdup(binary? "ab" : "a");
+ break;
+ case filemode_ReadWrite:
+ if( g_file_test(fileref->filename, G_FILE_TEST_EXISTS) ) {
+ modestr = g_strdup(binary? "r+b" : "r+");
+ } else {
+ modestr = g_strdup(binary? "w+b" : "w+");
}
+ break;
+ default:
+ ILLEGAL_PARAM("Invalid file mode: %u", fmode);
+ return NULL;
+ }
+
+ FILE *fp = g_fopen(fileref->filename, modestr);
+ g_free(modestr);
+ if(fp == NULL) {
+ IO_WARNING( "Error opening file", fileref->filename, g_strerror(errno) );
+ return NULL;
+ }
+
+ /* If they opened a file in write mode but didn't specifically get
+ permission to do so, complain if the file already exists */
+ if(fileref->orig_filemode == filemode_Read && fmode != filemode_Read) {
+ gdk_threads_enter();
+
+ GtkWidget *dialog = gtk_message_dialog_new(NULL, 0,
+ GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
+ "File '%s' already exists. Overwrite?", fileref->filename);
+ gint response = gtk_dialog_run(GTK_DIALOG(dialog));
+ gtk_widget_destroy(dialog);
+
+ gdk_threads_leave();
+
+ if(response != GTK_RESPONSE_YES) {
+ if(fclose(fp) != 0)
+ IO_WARNING( "Error closing file", fileref->filename, g_strerror(errno) );
+ return NULL;
+ }
+ }
+
+ strid_t str = stream_new_common(rock, fmode, STREAM_TYPE_FILE);
+ str->file_pointer = fp;
+ str->binary = binary;
+ str->unicode = unicode;
+ str->filename = g_filename_to_utf8(fileref->filename, -1, NULL, NULL, NULL);
+ if(str->filename == NULL)
+ str->filename = g_strdup("Unknown file name"); /* fail silently */
+
+ return str;
+}
+
+/**
+ * glk_stream_open_file:
+ * @fileref: Indicates the file which will be opened.
+ * @fmode: Mode in which the file will be opened. Can be any of #filemode_Read,
+ * #filemode_Write, #filemode_WriteAppend, or #filemode_ReadWrite.
+ * @rock: The new stream's rock value.
+ *
+ * Opens a stream which reads to or writes from a disk file. If @fmode is
+ * #filemode_Read, the file must already exist; for the other modes, an empty
+ * file is created if none exists. If @fmode is #filemode_Write, and the file
+ * already exists, it is truncated down to zero length (an empty file). If
+ * @fmode is #filemode_WriteAppend, the file mark is set to the end of the
+ * file.
+ *
+ * When writing in binary mode, Unicode values (characters greater than 255)
+ * cannot be written to the file. If you try, they will be stored as 0x3F
+ * (<code>"?"</code>) characters. In text mode, Unicode values may be stored
+ * exactly, approximated, or abbreviated, depending on what the platform's text
+ * files support.
+ *
+ * Returns: A new stream, or %NULL if the file operation failed.
+ */
+strid_t
+glk_stream_open_file(frefid_t fileref, glui32 fmode, glui32 rock)
+{
+ return file_stream_new(fileref, fmode, rock, FALSE);
+}
+
+/**
+ * glk_stream_open_file_uni:
+ * @fileref: Indicates the file which will be opened.
+ * @fmode: Mode in which the file will be opened. Can be any of #filemode_Read,
+ * #filemode_Write, #filemode_WriteAppend, or #filemode_ReadWrite.
+ * @rock: The new stream's rock value.
+ *
+ * This works just like glk_stream_open_file(), except that in binary mode,
+ * characters are written and read as four-byte (big-endian) values. This
+ * allows you to write any Unicode character.
+ *
+ * In text mode, the file is written and read in a platform-dependent way, which
+ * may or may not handle all Unicode characters. A text-mode file created with
+ * glk_stream_open_file_uni() may have the same format as a text-mode file
+ * created with glk_stream_open_file(); or it may use a more Unicode-friendly
+ * format.
+ *
+ * Returns: A new stream, or %NULL if the file operation failed.
+ */
+strid_t
+glk_stream_open_file_uni(frefid_t fileref, glui32 fmode, glui32 rock)
+{
+ return file_stream_new(fileref, fmode, rock, TRUE);
+}
+
+/**
+ * glk_stream_close:
+ * @str: Stream to close.
+ * @result: Pointer to a #stream_result_t, or %NULL.
+ *
+ * Closes the stream @str. The @result argument points to a structure which is
+ * filled in with the final character counts of the stream. If you do not care
+ * about these, you may pass %NULL as the @result argument.
+ *
+ * If @str is the current output stream, the current output stream is set to
+ * %NULL.
+ *
+ * You cannot close window streams; use glk_window_close() instead. See <link
+ * linkend="chimara-Window-Opening-Closing-and-Constraints">Window Opening,
+ * Closing, and Constraints</link>.
+ */
+void
+glk_stream_close(strid_t str, stream_result_t *result)
+{
+ VALID_STREAM(str, return);
+
+ /* Free resources associated with one specific type of stream */
+ switch(str->type)
+ {
+ case STREAM_TYPE_WINDOW:
+ ILLEGAL("Attempted to close a window stream. Use glk_window_close() instead.");
+ return;
- g_free(utf8);
+ case STREAM_TYPE_MEMORY:
+ /* Do nothing */
+ break;
+
+ case STREAM_TYPE_FILE:
+ if(fclose(str->file_pointer) != 0)
+ IO_WARNING( "Failed to close file", str->filename, g_strerror(errno) );
+ g_free(str->filename);
break;
default:
- g_warning("glk_put_string: "
- "Writing to this kind of stream unsupported.");
+ ILLEGAL_PARAM("Unknown stream type: %u", str->type);
+ return;
+ }
+
+ stream_close_common(str, result);
+}
+
+/* Internal function: Stuff to do upon closing any type of stream. */
+void
+stream_close_common(strid_t str, stream_result_t *result)
+{
+ /* Remove the stream from the global stream list */
+ glk_data->stream_list = g_list_delete_link(glk_data->stream_list, str->stream_list);
+
+ /* If it was the current output stream, set that to NULL */
+ if(glk_data->current_stream == str)
+ glk_data->current_stream = NULL;
+
+ /* If it was one or more windows' echo streams, set those to NULL */
+ winid_t win;
+ for(win = glk_window_iterate(NULL, NULL); win;
+ win = glk_window_iterate(win, NULL))
+ if(win->echo_stream == str)
+ win->echo_stream = NULL;
+
+ /* Return the character counts */
+ if(result)
+ {
+ result->readcount = str->read_count;
+ result->writecount = str->write_count;
}
+
+ str->magic = MAGIC_FREE;
+ g_free(str);
}
projects / projects / chimara / chimara.git / blobdiff