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Commitedd626c

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committed
Try this snprintf() implementation, used in sendmail...
1 parent370d6cd commitedd626c

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1 file changed

+309
-58
lines changed

1 file changed

+309
-58
lines changed

‎src/backend/port/snprintf.c

Lines changed: 309 additions & 58 deletions
Original file line numberDiff line numberDiff line change
@@ -1,30 +1,28 @@
1-
/*-
2-
* Copyright (c) 1990, 1993
1+
/*
2+
* Copyright (c) 1983, 1995, 1996 Eric P. Allman
3+
* Copyright (c) 1988, 1993
34
*The Regents of the University of California. All rights reserved.
45
*
5-
* This code is derived from software contributed to Berkeley by
6-
* Chris Torek.
7-
*
86
* Redistribution and use in source and binary forms, with or without
97
* modification, are permitted provided that the following conditions
108
* are met:
119
* 1. Redistributions of source code must retain the above copyright
12-
* notice, this list of conditions and the following disclaimer.
10+
* notice, this list of conditions and the following disclaimer.
1311
* 2. Redistributions in binary form must reproduce the above copyright
14-
* notice, this list of conditions and the following disclaimer in the
15-
* documentation and/or other materials provided with the distribution.
12+
* notice, this list of conditions and the following disclaimer in the
13+
* documentation and/or other materials provided with the distribution.
1614
* 3. All advertising materials mentioning features or use of this software
17-
* must display the following acknowledgement:
15+
* must display the following acknowledgement:
1816
*This product includes software developed by the University of
1917
*California, Berkeley and its contributors.
2018
* 4. Neither the name of the University nor the names of its contributors
21-
* may be used to endorse or promote products derived from this software
22-
* without specific prior written permission.
19+
* may be used to endorse or promote products derived from this software
20+
* without specific prior written permission.
2321
*
2422
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2523
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2624
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27-
* ARE DISCLAIMED.IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25+
* ARE DISCLAIMED.IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2826
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2927
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
3028
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
@@ -34,59 +32,312 @@
3432
* SUCH DAMAGE.
3533
*/
3634

37-
#if defined(LIBC_SCCS)&& !defined(lint)
38-
#if0
39-
staticcharsccsid[]="@(#)snprintf.c8.1 (Berkeley) 6/4/93";
35+
# include"sendmail.h"
36+
# include"pathnames.h"
37+
# include<sys/ioctl.h>
38+
# include<sys/param.h>
4039

41-
#endif
42-
staticconstcharrcsid[]=
43-
"$Id: snprintf.c,v 1.3 1998/09/01 04:30:44 momjian Exp $";
40+
/*
41+
** SNPRINTF, VSNPRINT -- counted versions of printf
42+
**
43+
**These versions have been grabbed off the net. They have been
44+
**cleaned up to compile properly and support for .precision and
45+
**%lx has been added.
46+
*/
4447

45-
#endif/* LIBC_SCCS and not lint */
48+
/**************************************************************
49+
* Original:
50+
* Patrick Powell Tue Apr 11 09:48:21 PDT 1995
51+
* A bombproof version of doprnt (dopr) included.
52+
* Sigh. This sort of thing is always nasty do deal with. Note that
53+
* the version here does not include floating point...
54+
*
55+
* snprintf() is used instead of sprintf() as it does limit checks
56+
* for string length. This covers a nasty loophole.
57+
*
58+
* The other functions are there to prevent NULL pointers from
59+
* causing nast effects.
60+
**************************************************************/
4661

47-
#include<limits.h>
48-
#include<stdio.h>
49-
#if__STDC__
50-
#include<stdarg.h>
51-
#else
52-
#include<varargs.h>
53-
#endif
62+
/*static char _id[] = "$Id: snprintf.c,v 1.4 1998/09/04 14:34:23 scrappy Exp $";*/
63+
staticvoiddopr();
64+
staticchar*end;
65+
staticintSnprfOverflow;
5466

55-
#if__STDC__
67+
/* VARARGS3 */
5668
int
57-
snprintf(char*str,size_tn,charconst*fmt,...)
58-
#else
69+
# ifdef__STDC__
70+
snprintf(char*str,size_tcount,constchar*fmt, ...)
71+
# else
72+
snprintf(str,count,fmt,va_alist)
73+
char*str;
74+
size_tcount;
75+
constchar*fmt;
76+
va_dcl
77+
#endif
78+
{
79+
intlen;
80+
VA_LOCAL_DECL
81+
82+
VA_START(fmt);
83+
len=vsnprintf(str,count,fmt,ap);
84+
VA_END;
85+
returnlen;
86+
}
87+
88+
89+
# ifndefluna2
5990
int
60-
snprintf(str,n,fmt,va_alist)
61-
char*str;
62-
size_tn;
63-
char*fmt;
91+
vsnprintf(str,count,fmt,args)
92+
char*str;
93+
size_tcount;
94+
constchar*fmt;
95+
va_listargs;
96+
{
97+
str[0]=0;
98+
end=str+count-1;
99+
SnprfOverflow=0;
100+
dopr(str,fmt,args );
101+
if (count>0)
102+
end[0]=0;
103+
if (SnprfOverflow&&tTd(57,2))
104+
printf("\nvsnprintf overflow, len = %d, str = %s",
105+
count,shortenstring(str,203));
106+
returnstrlen(str);
107+
}
64108

65-
va_dcl
66-
#endif
109+
/*
110+
* dopr(): poor man's version of doprintf
111+
*/
112+
113+
staticvoidfmtstr__P((char*value,intljust,intlen,intzpad,intmaxwidth));
114+
staticvoidfmtnum__P((longvalue,intbase,intdosign,intljust,intlen,intzpad));
115+
staticvoiddostr__P((char* ,int ));
116+
staticchar*output;
117+
staticvoiddopr_outch__P((intc ));
118+
119+
staticvoid
120+
dopr(buffer,format,args )
121+
char*buffer;
122+
constchar*format;
123+
va_listargs;
67124
{
68-
size_ton;
69-
intret;
70-
va_listap;
71-
FILEf;
72-
73-
on=n;
74-
if (n!=0)
75-
n--;
76-
if (n>INT_MAX)
77-
n=INT_MAX;
78-
#if__STDC__
79-
va_start(ap,fmt);
80-
#else
81-
va_start(ap);
125+
intch;
126+
longvalue;
127+
intlongflag=0;
128+
intpointflag=0;
129+
intmaxwidth=0;
130+
char*strvalue;
131+
intljust;
132+
intlen;
133+
intzpad;
134+
135+
output=buffer;
136+
while( (ch=*format++) ){
137+
switch(ch ){
138+
case'%':
139+
ljust=len=zpad=maxwidth=0;
140+
longflag=pointflag=0;
141+
nextch:
142+
ch=*format++;
143+
switch(ch ){
144+
case0:
145+
dostr("**end of format**" ,0);
146+
return;
147+
case'-':ljust=1; gotonextch;
148+
case'0':/* set zero padding if len not set */
149+
if(len==0&& !pointflag)zpad='0';
150+
case'1':case'2':case'3':
151+
case'4':case'5':case'6':
152+
case'7':case'8':case'9':
153+
if (pointflag)
154+
maxwidth=maxwidth*10+ch-'0';
155+
else
156+
len=len*10+ch-'0';
157+
gotonextch;
158+
case'*':
159+
if (pointflag)
160+
maxwidth=va_arg(args,int );
161+
else
162+
len=va_arg(args,int );
163+
gotonextch;
164+
case'.':pointflag=1; gotonextch;
165+
case'l':longflag=1; gotonextch;
166+
case'u':case'U':
167+
/*fmtnum(value,base,dosign,ljust,len,zpad) */
168+
if(longflag ){
169+
value=va_arg(args,long );
170+
}else {
171+
value=va_arg(args,int );
172+
}
173+
fmtnum(value,10,0,ljust,len,zpad );break;
174+
case'o':case'O':
175+
/*fmtnum(value,base,dosign,ljust,len,zpad) */
176+
if(longflag ){
177+
value=va_arg(args,long );
178+
}else {
179+
value=va_arg(args,int );
180+
}
181+
fmtnum(value,8,0,ljust,len,zpad );break;
182+
case'd':case'D':
183+
if(longflag ){
184+
value=va_arg(args,long );
185+
}else {
186+
value=va_arg(args,int );
187+
}
188+
fmtnum(value,10,1,ljust,len,zpad );break;
189+
case'x':
190+
if(longflag ){
191+
value=va_arg(args,long );
192+
}else {
193+
value=va_arg(args,int );
194+
}
195+
fmtnum(value,16,0,ljust,len,zpad );break;
196+
case'X':
197+
if(longflag ){
198+
value=va_arg(args,long );
199+
}else {
200+
value=va_arg(args,int );
201+
}
202+
fmtnum(value,-16,0,ljust,len,zpad );break;
203+
case's':
204+
strvalue=va_arg(args,char*);
205+
if (maxwidth>0|| !pointflag) {
206+
if (pointflag&&len>maxwidth)
207+
len=maxwidth;/* Adjust padding */
208+
fmtstr(strvalue,ljust,len,zpad,maxwidth);
209+
}
210+
break;
211+
case'c':
212+
ch=va_arg(args,int );
213+
dopr_outch(ch );break;
214+
case'%':dopr_outch(ch );continue;
215+
default:
216+
dostr("???????" ,0);
217+
}
218+
break;
219+
default:
220+
dopr_outch(ch );
221+
break;
222+
}
223+
}
224+
*output=0;
225+
}
226+
227+
staticvoid
228+
fmtstr(value,ljust,len,zpad,maxwidth )
229+
char*value;
230+
intljust,len,zpad,maxwidth;
231+
{
232+
intpadlen,strlen;/* amount to pad */
233+
234+
if(value==0 ){
235+
value="<NULL>";
236+
}
237+
for(strlen=0;value[strlen];++strlen );/* strlen */
238+
if (strlen>maxwidth&&maxwidth)
239+
strlen=maxwidth;
240+
padlen=len-strlen;
241+
if(padlen<0 )padlen=0;
242+
if(ljust )padlen=-padlen;
243+
while(padlen>0 ) {
244+
dopr_outch(' ' );
245+
--padlen;
246+
}
247+
dostr(value,maxwidth );
248+
while(padlen<0 ) {
249+
dopr_outch(' ' );
250+
++padlen;
251+
}
252+
}
253+
254+
staticvoid
255+
fmtnum(value,base,dosign,ljust,len,zpad )
256+
longvalue;
257+
intbase,dosign,ljust,len,zpad;
258+
{
259+
intsignvalue=0;
260+
unsigned longuvalue;
261+
charconvert[20];
262+
intplace=0;
263+
intpadlen=0;/* amount to pad */
264+
intcaps=0;
265+
266+
/* DEBUGP(("value 0x%x, base %d, dosign %d, ljust %d, len %d, zpad %d\n",
267+
value, base, dosign, ljust, len, zpad )); */
268+
uvalue=value;
269+
if(dosign ){
270+
if(value<0 ) {
271+
signvalue='-';
272+
uvalue=-value;
273+
}
274+
}
275+
if(base<0 ){
276+
caps=1;
277+
base=-base;
278+
}
279+
do{
280+
convert[place++]=
281+
(caps?"0123456789ABCDEF":"0123456789abcdef")
282+
[uvalue % (unsigned)base ];
283+
uvalue= (uvalue / (unsigned)base );
284+
}while(uvalue);
285+
convert[place]=0;
286+
padlen=len-place;
287+
if(padlen<0 )padlen=0;
288+
if(ljust )padlen=-padlen;
289+
/* DEBUGP(( "str '%s', place %d, sign %c, padlen %d\n",
290+
convert,place,signvalue,padlen)); */
291+
if(zpad&&padlen>0 ){
292+
if(signvalue ){
293+
dopr_outch(signvalue );
294+
--padlen;
295+
signvalue=0;
296+
}
297+
while(padlen>0 ){
298+
dopr_outch(zpad );
299+
--padlen;
300+
}
301+
}
302+
while(padlen>0 ) {
303+
dopr_outch(' ' );
304+
--padlen;
305+
}
306+
if(signvalue )dopr_outch(signvalue );
307+
while(place>0 )dopr_outch(convert[--place] );
308+
while(padlen<0 ){
309+
dopr_outch(' ' );
310+
++padlen;
311+
}
312+
}
313+
314+
staticvoid
315+
dostr(str ,cut)
316+
char*str;
317+
intcut;
318+
{
319+
if (cut) {
320+
while(*str&&cut-->0)dopr_outch(*str++);
321+
}else {
322+
while(*str)dopr_outch(*str++);
323+
}
324+
}
325+
326+
staticvoid
327+
dopr_outch(c )
328+
intc;
329+
{
330+
#if0
331+
if(iscntrl(c)&&c!='\n'&&c!='\t' ){
332+
c='@'+ (c&0x1F);
333+
if(end==0||output<end )
334+
*output++='^';
335+
}
82336
#endif
83-
f._file=-1;
84-
f._flags=__SWR |__SSTR;
85-
f._bf._base=f._p= (unsignedchar*)str;
86-
f._bf._size=f._w=n;
87-
ret=vfprintf(&f,fmt,ap);
88-
if (on>0)
89-
*f._p='\0';
90-
va_end(ap);
91-
returnret;
337+
if(end==0||output<end )
338+
*output++=c;
339+
else
340+
SnprfOverflow++;
92341
}
342+
343+
# endif/* !luna2 */

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