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-rw-r--r--camel/camel-stream.c275
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diff --git a/camel/camel-stream.c b/camel/camel-stream.c
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; fill-column: 160 -*- */
-/* camel-stream.c : abstract class for a stream */
-
-/*
- * Author:
- * Bertrand Guiheneuf <bertrand@helixcode.com>
- *
- * Copyright 1999, 2000 Ximian, Inc. (www.ximian.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <string.h>
-#include "camel-stream.h"
-
-static CamelObjectClass *parent_class = NULL;
-
-/* Returns the class for a CamelStream */
-#define CS_CLASS(so) CAMEL_STREAM_CLASS(CAMEL_OBJECT_GET_CLASS(so))
-
-/* default implementations, do very little */
-static ssize_t stream_read (CamelStream *stream, char *buffer, size_t n) { return 0; }
-static ssize_t stream_write (CamelStream *stream, const char *buffer, size_t n) { return n; }
-static int stream_close (CamelStream *stream) { return 0; }
-static int stream_flush (CamelStream *stream) { return 0; }
-static gboolean stream_eos (CamelStream *stream) { return stream->eos; }
-static int stream_reset (CamelStream *stream) { return 0; }
-
-static void
-camel_stream_class_init (CamelStreamClass *camel_stream_class)
-{
- parent_class = camel_type_get_global_classfuncs( CAMEL_OBJECT_TYPE );
-
- /* virtual method definition */
- camel_stream_class->read = stream_read;
- camel_stream_class->write = stream_write;
- camel_stream_class->close = stream_close;
- camel_stream_class->flush = stream_flush;
- camel_stream_class->eos = stream_eos;
- camel_stream_class->reset = stream_reset;
-}
-
-CamelType
-camel_stream_get_type (void)
-{
- static CamelType camel_stream_type = CAMEL_INVALID_TYPE;
-
- if (camel_stream_type == CAMEL_INVALID_TYPE) {
- camel_stream_type = camel_type_register( CAMEL_OBJECT_TYPE,
- "CamelStream",
- sizeof( CamelStream ),
- sizeof( CamelStreamClass ),
- (CamelObjectClassInitFunc) camel_stream_class_init,
- NULL,
- NULL,
- NULL );
- }
-
- return camel_stream_type;
-}
-
-/**
- * camel_stream_read:
- * @stream: a CamelStream.
- * @buffer: buffer where bytes pulled from the stream are stored.
- * @n: max number of bytes to read.
- *
- * Read at most @n bytes from the @stream object and stores them
- * in the buffer pointed at by @buffer.
- *
- * Return value: number of bytes actually read, or -1 on error and
- * set errno.
- **/
-ssize_t
-camel_stream_read (CamelStream *stream, char *buffer, size_t n)
-{
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
- g_return_val_if_fail (n == 0 || buffer, -1);
-
- return CS_CLASS (stream)->read (stream, buffer, n);
-}
-
-/**
- * camel_stream_write:
- * @stream: a CamelStream object.
- * @buffer: buffer to write.
- * @n: number of bytes to write
- *
- * Write @n bytes from the buffer pointed at by @buffer into @stream.
- *
- * Return value: the number of bytes actually written to the stream,
- * or -1 on error.
- **/
-ssize_t
-camel_stream_write (CamelStream *stream, const char *buffer, size_t n)
-{
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
- g_return_val_if_fail (n == 0 || buffer, -1);
-
- return CS_CLASS (stream)->write (stream, buffer, n);
-}
-
-/**
- * camel_stream_flush:
- * @stream: a CamelStream object
- *
- * Flushes the contents of the stream to its backing store. Only meaningful
- * on writable streams.
- *
- * Return value: -1 on error.
- **/
-int
-camel_stream_flush (CamelStream *stream)
-{
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
-
- return CS_CLASS (stream)->flush (stream);
-}
-
-/**
- * camel_stream_close:
- * @stream:
- *
- * Close a stream.
- *
- * Return value: -1 on error.
- **/
-int
-camel_stream_close (CamelStream *stream)
-{
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
-
- return CS_CLASS (stream)->close (stream);
-}
-
-/**
- * camel_stream_eos:
- * @stream: a CamelStream object
- *
- * Test if there are bytes left to read on the @stream object.
- *
- * Return value: %TRUE if all the contents on the stream has been read, or
- * %FALSE if information is still available.
- **/
-gboolean
-camel_stream_eos (CamelStream *stream)
-{
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), TRUE);
-
- return CS_CLASS (stream)->eos (stream);
-}
-
-/**
- * camel_stream_reset: reset a stream
- * @stream: the stream object
- *
- * Reset a stream. That is, put it in a state where it can be read
- * from the beginning again. Not all streams in Camel are seekable,
- * but they must all be resettable.
- *
- * Return value: -1 on error.
- **/
-int
-camel_stream_reset (CamelStream *stream)
-{
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
-
- return CS_CLASS (stream)->reset (stream);
-}
-
-/***************** Utility functions ********************/
-
-/**
- * camel_stream_write_string:
- * @stream: a stream object
- * @string: a string
- *
- * Writes the string to the stream.
- *
- * Return value: the number of characters output, -1 on error.
- **/
-ssize_t
-camel_stream_write_string (CamelStream *stream, const char *string)
-{
- return camel_stream_write (stream, string, strlen (string));
-}
-
-/**
- * camel_stream_printf:
- * @stream: a stream object
- * @fmt: a printf-style format string
- *
- * This printfs the given data to @stream.
- *
- * Return value: the number of characters output, -1 on error.
- **/
-ssize_t
-camel_stream_printf (CamelStream *stream, const char *fmt, ... )
-{
- va_list args;
- char *string;
- ssize_t ret;
-
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
-
- va_start (args, fmt);
- string = g_strdup_vprintf (fmt, args);
- va_end (args);
-
- if (!string)
- return -1;
-
- ret = camel_stream_write (stream, string, strlen (string));
- g_free (string);
- return ret;
-}
-
-/**
- * camel_stream_write_to_stream:
- * @stream: Source CamelStream.
- * @output_stream: Destination CamelStream.
- *
- * Write all of a stream (until eos) into another stream, in a blocking
- * fashion.
- *
- * Return value: Returns -1 on error, or the number of bytes succesfully
- * copied across streams.
- **/
-ssize_t
-camel_stream_write_to_stream (CamelStream *stream, CamelStream *output_stream)
-{
- char tmp_buf[4096];
- ssize_t total = 0;
- ssize_t nb_read;
- ssize_t nb_written;
-
- g_return_val_if_fail (CAMEL_IS_STREAM (stream), -1);
- g_return_val_if_fail (CAMEL_IS_STREAM (output_stream), -1);
-
- while (!camel_stream_eos (stream)) {
- nb_read = camel_stream_read (stream, tmp_buf, sizeof (tmp_buf));
- if (nb_read < 0)
- return -1;
- else if (nb_read > 0) {
- nb_written = 0;
-
- while (nb_written < nb_read) {
- ssize_t len = camel_stream_write (output_stream, tmp_buf + nb_written,
- nb_read - nb_written);
- if (len < 0)
- return -1;
- nb_written += len;
- }
- total += nb_written;
- }
- }
- return total;
-}