Use the linewrap filter to achieve full RFC0821 compliance.

2000-09-19  Jeffrey Stedfast  <fejj@helixcode.com>

	* providers/smtp/camel-smtp-transport.c (smtp_data): Use the
	linewrap filter to achieve full RFC0821 compliance.

	* camel-mime-filter-linewrap.[c,h]: New mime-filter to word-wrap.

svn path=/trunk/; revision=5510

1 files changed, 140 insertions, 0 deletions

diff --git a/camel/camel-mime-filter-linewrap.c b/camel/camel-mime-filter-linewrap.c
new file mode 100644
index 0000000000..dee6c19abb
--- /dev/null
+++ b/camel/camel-mime-filter-linewrap.c
@@ -0,0 +1,140 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ *  Copyright (C) 2000 Helix Code, Inc.
+ *
+ *  Authors: Jeffrey Stedfast <fejj@helixcode.com>
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Library General Public
+ *  License along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "camel-mime-filter-linewrap.h"
+#include <ctype.h>
+
+static void filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
+		    char **out, size_t *outlen, size_t *outprespace);
+static void complete (CamelMimeFilter *f, char *in, size_t len,
+		      size_t prespace, char **out, size_t *outlen,
+		      size_t *outprespace);
+static void reset (CamelMimeFilter *f);
+
+
+static void
+camel_mime_filter_linewrap_class_init (CamelMimeFilterLinewrapClass *klass)
+{
+	CamelMimeFilterClass *mime_filter_class =
+		(CamelMimeFilterClass *) klass;
+	
+	mime_filter_class->filter = filter;
+	mime_filter_class->complete = complete;
+	mime_filter_class->reset = reset;
+}
+
+CamelType
+camel_mime_filter_linewrap_get_type (void)
+{
+	static CamelType type = CAMEL_INVALID_TYPE;
+	
+	if (type == CAMEL_INVALID_TYPE) {
+		type = camel_type_register (camel_mime_filter_get_type(), "CamelMimeFilterLinewrap",
+					    sizeof (CamelMimeFilterLinewrap),
+					    sizeof (CamelMimeFilterLinewrapClass),
+					    (CamelObjectClassInitFunc) camel_mime_filter_linewrap_class_init,
+					    NULL,
+					    NULL,
+					    NULL);
+	}
+	
+	return type;
+}
+
+static void
+filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
+	char **out, size_t *outlen, size_t *outprespace)
+{
+	CamelMimeFilterLinewrap *linewrap = (CamelMimeFilterLinewrap *)f;
+	char *inend, *last, *p, *q;
+	int nchars = linewrap->nchars;
+	
+	/* we'll be adding chars here so we need a bigger buffer */
+	camel_mime_filter_set_size (f, 3 * len, FALSE);
+	
+	p = in;
+	q = f->outbuf;
+	inend = in + len;
+	
+	while (p < inend) {
+		if (*p == '\n') {
+			last = q;
+			*q++ = *p++;
+			nchars = 0;
+		} else if (isspace (*p)) {
+			last = q;
+			
+			if (nchars >= linewrap->wrap_len) {
+				*q++ = '\n';
+				p++;
+				nchars = 0;
+			} else {
+				*q++ = *p++;
+			}
+		} else {
+			*q++ = *p++;
+			nchars++;
+		}
+		
+		/* line is getting way too long, we must force a wrap here */
+		if (nchars >= (linewrap->max_len - 1) && *p != '\n') {
+			*q++ = '\n';
+			*q++ = linewrap->indent;
+			nchars = 0;
+		}
+	}
+	
+	linewrap->nchars = nchars;
+	
+	*out = f->outbuf;
+	*outlen = q - f->outbuf;
+	*outprespace = f->outpre;
+}
+
+static void 
+complete (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
+	  char **out, size_t *outlen, size_t *outprespace)
+{
+	if (len)
+		filter (f, in, len, prespace, out, outlen, outprespace);
+}
+
+static void
+reset (CamelMimeFilter *f)
+{
+	CamelMimeFilterLinewrap *linewrap = (CamelMimeFilterLinewrap *)f;
+	
+	linewrap->nchars = 0;
+}
+
+CamelMimeFilter *
+camel_mime_filter_linewrap_new (guint preferred_len, guint max_len, char indent_char)
+{
+	CamelMimeFilterLinewrap *linewrap =
+		CAMEL_MIME_FILTER_LINEWRAP (camel_object_new (CAMEL_MIME_FILTER_LINEWRAP_TYPE));
+	
+	linewrap->indent = indent_char;
+	linewrap->wrap_len = preferred_len;
+	linewrap->max_len = max_len;
+	linewrap->nchars = 0;
+	
+	return (CamelMimeFilter *) linewrap;
+}