* Exim - an Internet mail transport agent *
*************************************************/
-/* Copyright (c) Michael Haardt 2003-2008 */
-/* See the file NOTICE for conditions of use and distribution. */
+/* Copyright (c) Michael Haardt 2003 - 2015
+ * Copyright (c) The Exim Maintainers 2016
+ * See the file NOTICE for conditions of use and distribution.
+ */
/* This code was contributed by Michael Haardt. */
uschar ch;
size_t line;
+/* Two passes: one to count output allocation size, second
+to do the encoding */
+
for (pass=0; pass<=1; ++pass)
{
line=0;
for (start=src->character,end=start+src->length; start<end; ++start)
{
ch=*start;
- if (line>=73)
+ if (line>=73) /* line length limit */
{
if (pass==0)
dst->length+=2;
else
{
- *new++='=';
+ *new++='='; /* line split */
*new++='\n';
}
line=0;
}
- if
- (
- (ch>=33 && ch<=60)
- || (ch>=62 && ch<=126)
- ||
- (
- (ch==9 || ch==32)
- && start+2<end
- && (*(start+1)!='\r' || *(start+2)!='\n')
- )
- )
+ if ( (ch>='!' && ch<='<')
+ || (ch>='>' && ch<='~')
+ || ( (ch=='\t' || ch==' ')
+ && start+2<end
+ && (*(start+1)!='\r' || *(start+2)!='\n') /* CRLF */
+ )
+ )
{
if (pass==0)
++dst->length;
else
- *new++=*start;
+ *new++=*start; /* copy char */
++line;
}
- else if (ch=='\r' && start+1<end && *(start+1)=='\n')
+ else if (ch=='\r' && start+1<end && *(start+1)=='\n') /* CRLF */
{
if (pass==0)
- {
++dst->length;
- line=0;
- }
else
- *new++='\n';
- line=0;
- ++start;
+ *new++='\n'; /* NL */
+ line=0;
+ ++start; /* consume extra input char */
}
else
{
if (pass==0)
dst->length+=3;
else
- {
- sprintf(CS new,"=%02X",ch);
+ { /* encoded char */
+ new += sprintf(CS new,"=%02X",ch);
new+=3;
}
line+=3;
if (uri>start)
{
capacity=0;
- to.character=(uschar*)0;
+ to.character= NULL;
to.length=0;
to.character=string_cat(to.character,&capacity,&to.length,start,uri-start);
to.character[to.length]='\0';
if (uri>start)
{
capacity=0;
- hname.character=(uschar*)0;
+ hname.character= NULL;
hname.length=0;
hname.character=string_cat(hname.character,&capacity,&hname.length,start,uri-start);
hname.character[hname.length]='\0';
if (uri>start)
{
capacity=0;
- hvalue.character=(uschar*)0;
+ hvalue.character= NULL;
hvalue.length=0;
hvalue.character=string_cat(hvalue.character,&capacity,&hvalue.length,start,uri-start);
hvalue.character[hvalue.length]='\0';