147 lines
3.1 KiB
C
147 lines
3.1 KiB
C
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/*
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** Copyright 1998 - 1999 Double Precision, Inc. See COPYING for
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** distribution information.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "rfc2045.h"
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#include <string.h>
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#if HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef __WINDOWS__
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#define strcasecmp stricmp
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#define strncasecmp strnicmp
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#endif
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/* $Id$ */
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extern void rfc2045_enomem();
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int rfc2045_ac_check(struct rfc2045 *p, int rwmode)
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{
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int flag=0; /* Flag - rewriting suggested */
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struct rfc2045 *c;
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int hasnon7bit=p->has8bitchars;
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/* hasnon7bit: 8bit chars in this section or subsections */
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const char *te;
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int is8bitte;
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for (c=p->firstpart; c; c=c->next)
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if (!c->isdummy)
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{
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if (rfc2045_ac_check(c, rwmode)) flag=1;
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if (strcmp(c->content_transfer_encoding, "7bit") &&
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strcmp(c->content_transfer_encoding, "quoted-printable"))
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hasnon7bit=1;
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if (c->has8bitchars)
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p->has8bitchars=1;
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}
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if (RFC2045_ISMIME1DEF(p->mime_version) && !p->content_type)
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{
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if ((p->content_type=strdup("text/plain")) == 0)
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rfc2045_enomem();
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if (p->mime_version)
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{
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flag=1;
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}
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}
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if (RFC2045_ISMIME1DEF(p->mime_version)
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&& !rfc2045_getattr(p->content_type_attr, "charset")
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&& strncasecmp(p->content_type, "text/", 5) == 0)
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{
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rfc2045_setattr(&p->content_type_attr, "charset",
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rfc2045_getdefaultcharset());
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if (p->mime_version
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&& p->firstpart == 0 /* sam - don't trigger rewrites on changes to multipart headers */
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)
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{
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flag=1;
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}
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}
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if (RFC2045_ISMIME1DEF(p->mime_version)
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&& !p->content_transfer_encoding)
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{
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if ((p->content_transfer_encoding=strdup(
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hasnon7bit ? "8bit":"7bit")) == 0)
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rfc2045_enomem();
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if (p->mime_version
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&& p->firstpart == 0 /* sam - don't trigger rewrites on changes to multipart headers */
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)
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{
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flag=1;
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}
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}
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#if 0
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if (RFC2045_ISMIME1DEF(p->mime_version)
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&& strncmp(p->content_type, "text/", 5) == 0 && !hasnon7bit
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&& strcmp(p->content_transfer_encoding, "7bit"))
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{
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if (p->mime_version)
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{
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flag=1;
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}
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}
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#endif
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if (RFC2045_ISMIME1DEF(p->mime_version))
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{
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/* Check for conversions */
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te=p->content_transfer_encoding;
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is8bitte=strcasecmp(te, "base64") &&
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strcasecmp(te, "quoted-printable") &&
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strcasecmp(te, "7bit"); /* 8 bit contents */
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if (is8bitte && !p->has8bitchars && !p->haslongline)
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{
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if (p->rw_transfer_encoding)
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free(p->rw_transfer_encoding);
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if ((p->rw_transfer_encoding=strdup("7bit")) == 0)
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rfc2045_enomem();
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flag=1;
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is8bitte=0;
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}
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if (rwmode == RFC2045_RW_7BIT && (is8bitte || p->haslongline))
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{
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if (p->rw_transfer_encoding)
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free(p->rw_transfer_encoding);
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if ((p->rw_transfer_encoding=strdup("quoted-printable"))
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== 0)
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rfc2045_enomem();
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flag=1;
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}
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else if (rwmode == RFC2045_RW_8BIT &&
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strcasecmp(te, "quoted-printable") == 0 &&
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!p->haslongline)
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{
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if (p->rw_transfer_encoding)
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free(p->rw_transfer_encoding);
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if ((p->rw_transfer_encoding=strdup(hasnon7bit
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? "8bit":"7bit")) == 0)
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rfc2045_enomem();
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flag=1;
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}
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}
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if (!p->mime_version)
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{
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if ((p->mime_version=strdup("1.0")) == 0)
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rfc2045_enomem();
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}
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return (flag);
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}
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