1 files changed, 145 insertions, 0 deletions
diff --git a/rfc2045/rfc2045acchk.c b/rfc2045/rfc2045acchk.c
new file mode 100644
index 0000000..9632d07
--- /dev/null
+++ b/rfc2045/rfc2045acchk.c
@@ -0,0 +1,145 @@
+/*
+** Copyright 1998 - 2001 Double Precision, Inc.  See COPYING for
+** distribution information.
+*/
+
+#if	HAVE_CONFIG_H
+#include "rfc2045_config.h"
+#endif
+#include	"rfc2045.h"
+#include	<string.h>
+#if	HAVE_STRINGS_H
+#include	<strings.h>
+#endif
+#include	<stdlib.h>
+#include	<stdio.h>
+
+
+extern void rfc2045_enomem();
+
+int rfc2045_ac_check(struct rfc2045 *p, int rwmode)
+{
+int	flag=0;		/* Flag - rewriting suggested */
+struct	rfc2045 *c;
+int	hasnon7bit=p->has8bitchars;
+		/* hasnon7bit: 8bit chars in this section or subsections */
+const char *te;
+int	is8bitte;
+
+	for (c=p->firstpart; c; c=c->next)
+		if (!c->isdummy)
+		{
+			if (rfc2045_ac_check(c, rwmode))	flag=1;
+			if (c->content_transfer_encoding &&
+			    strcmp(c->content_transfer_encoding, "7bit") &&
+			    strcmp(c->content_transfer_encoding, "uuencode") &&
+				strcmp(c->content_transfer_encoding, "quoted-printable"))
+				hasnon7bit=1;
+			if (c->has8bitchars)
+				p->has8bitchars=1;
+		}
+
+	if (RFC2045_ISMIME1DEF(p->mime_version) && !p->content_type)
+	{
+		if ((p->content_type=strdup("text/plain")) == 0)
+			rfc2045_enomem();
+		if (p->mime_version)
+		{
+			flag=1;
+		}
+	}
+
+	if (RFC2045_ISMIME1DEF(p->mime_version)
+		&& !rfc2045_getattr(p->content_type_attr, "charset")
+		&& strncasecmp(p->content_type, "text/", 5) == 0)
+	{
+		if (rfc2045_attrset(&p->content_type_attr, "charset",
+				    rfc2045_getdefaultcharset()) < 0)
+			rfc2045_enomem();
+
+		if (p->mime_version
+
+			&& p->firstpart == 0 /* sam - don't trigger rewrites on changes to multipart headers */
+
+			)
+		{
+			flag=1;
+		}
+	}
+
+	if (RFC2045_ISMIME1DEF(p->mime_version)
+		&& !p->content_transfer_encoding)
+	{
+		if ((p->content_transfer_encoding=strdup(
+			hasnon7bit ? "8bit":"7bit")) == 0)
+			rfc2045_enomem();
+		if (p->mime_version
+
+			&& p->firstpart == 0 /* sam - don't trigger rewrites on changes to multipart headers */
+			)
+		{
+			flag=1;
+		}
+	}
+
+#if 0
+	if (RFC2045_ISMIME1DEF(p->mime_version)
+		&& strncmp(p->content_type, "text/", 5) == 0 && !hasnon7bit
+		&& strcmp(p->content_transfer_encoding, "7bit"))
+	{
+		if (p->mime_version)
+		{
+			flag=1;
+		}
+	}
+#endif
+
+	if (RFC2045_ISMIME1DEF(p->mime_version))
+	{
+		/* Check for conversions */
+
+		te=p->content_transfer_encoding;
+		is8bitte=strcasecmp(te, "base64") &&
+			strcasecmp(te, "quoted-printable") &&
+			strcasecmp(te, "uuencode") &&
+			strcasecmp(te, "7bit");	/* 8 bit contents */
+
+		if (is8bitte && !p->has8bitchars && !p->haslongline)
+		{
+			if (p->rw_transfer_encoding)
+				free(p->rw_transfer_encoding);
+			if ((p->rw_transfer_encoding=strdup("7bit")) == 0)
+				rfc2045_enomem();
+			flag=1;
+			is8bitte=0;
+		}
+
+		if (rwmode == RFC2045_RW_7BIT && (is8bitte || p->haslongline))
+		{
+			if (p->rw_transfer_encoding)
+				free(p->rw_transfer_encoding);
+			if ((p->rw_transfer_encoding=strdup("quoted-printable"))
+				== 0)
+				rfc2045_enomem();
+			flag=1;
+		}
+		else if (rwmode == RFC2045_RW_8BIT &&
+			strcasecmp(te, "quoted-printable") == 0 &&
+			!p->haslongline)
+		{
+			if (p->rw_transfer_encoding)
+				free(p->rw_transfer_encoding);
+			if ((p->rw_transfer_encoding=strdup(hasnon7bit
+					? "8bit":"7bit")) == 0)
+				rfc2045_enomem();
+			flag=1;
+		}
+	}
+
+	if (!p->mime_version)
+	{
+		if ((p->mime_version=strdup("1.0")) == 0)
+			rfc2045_enomem();
+	}
+	return (flag);
+}