File: snprintf.c

package info (click to toggle)
smtpfeed 1.02-2
  • links: PTS
  • area: main
  • in suites: potato
  • size: 824 kB
  • ctags: 765
  • sloc: ansic: 13,150; sh: 230; perl: 133; makefile: 97
file content (406 lines) | stat: -rw-r--r-- 11,346 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
/*
 * Copyright (c) 1997,1998 Motonori Nakamura <motonori@econ.kyoto-u.ac.jp>
 * Copyright (c) 1997,1998 WIDE Project
 * Copyright (c) 1997,1998 Kyoto University
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by WIDE Project and
 *      its contributors.
 * 4. Neither the name of the Project, the University nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char *_id_ = "$Id: snprintf.c,v 1.8 1998/07/04 04:43:52 motonori Exp $";
#endif

#include "common.h"

#ifndef __P
# define __P(x)         ()
#endif

#ifdef __STDC__
# include <stdarg.h>
# define VA_LOCAL_DECL	va_list ap;
# define VA_START(f)	va_start(ap, f)
# define VA_END		va_end(ap)
#else
# include <varargs.h>
# define VA_LOCAL_DECL	va_list ap;
# define VA_START(f)	va_start(ap)
# define VA_END		va_end(ap)
# define const
#endif

/*
 * Copyright (c) 1998 Sendmail, Inc.  All rights reserved.
 * Copyright (c) 1997 Eric P. Allman.  All rights reserved.
 * Copyright (c) 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 *
 */

#ifndef lint
static char sccsid[] = "@(#)snprintf.c	8.11 (Berkeley) 6/4/98";
#endif /* not lint */

/* #include "sendmail.h" */

/*
**  SNPRINTF, VSNPRINT -- counted versions of printf
**
**	These versions have been grabbed off the net.  They have been
**	cleaned up to compile properly and support for .precision and
**	%lx has been added.
*/

/**************************************************************
 * Original:
 * Patrick Powell Tue Apr 11 09:48:21 PDT 1995
 * A bombproof version of doprnt (sm_dopr) included.
 * Sigh.  This sort of thing is always nasty do deal with.  Note that
 * the version here does not include floating point...
 *
 * snprintf() is used instead of sprintf() as it does limit checks
 * for string length.  This covers a nasty loophole.
 *
 * The other functions are there to prevent NULL pointers from
 * causing nast effects.
 **************************************************************/

/*static char _id[] = "$Id: snprintf.c,v 1.8 1998/07/04 04:43:52 motonori Exp $";*/
void	sm_dopr();
char	*DoprEnd;
int	SnprfOverflow;

#if !HASSNPRINTF

/* VARARGS3 */
int
# ifdef __STDC__
snprintf(char *str, size_t count, const char *fmt, ...)
# else
snprintf(str, count, fmt, va_alist)
	char *str;
	size_t count;
	const char *fmt;
	va_dcl
#endif
{
	int len;
	VA_LOCAL_DECL

	VA_START(fmt);
	len = vsnprintf(str, count, fmt, ap);
	VA_END;
	return len;
}


# ifndef luna2
int
vsnprintf(str, count, fmt, args)
	char *str;
	size_t count;
	const char *fmt;
	va_list args;
{
	str[0] = 0;
	DoprEnd = str + count - 1;
	SnprfOverflow = 0;
	sm_dopr( str, fmt, args );
	if (count > 0)
		DoprEnd[0] = 0;
#if 0
	if (SnprfOverflow && tTd(57, 2))
		printf("\nvsnprintf overflow, len = %ld, str = %s",
			(long) count, shortenstring(str, MAXSHORTSTR));
#endif
	return strlen(str);
}

# endif /* !luna2 */
#endif /* !HASSNPRINTF */

/*
 * sm_dopr(): poor man's version of doprintf
 */

void fmtstr __P((char *value, int ljust, int len, int zpad, int maxwidth));
void fmtnum __P((long value, int base, int dosign, int ljust, int len, int zpad));
void dostr __P(( char * , int ));
char *output;
void dopr_outch __P(( int c ));
int	SyslogErrno;

void
sm_dopr( buffer, format, args )
       char *buffer;
       const char *format;
       va_list args;
{
       int ch;
       long value;
       int longflag  = 0;
       int pointflag = 0;
       int maxwidth  = 0;
       char *strvalue;
       int ljust;
       int len;
       int zpad;
# if !HASSTRERROR && !defined(ERRLIST_PREDEFINED)
	extern char *sys_errlist[];
	extern int sys_nerr;
# endif


       output = buffer;
       while( (ch = *format++) != '\0' ){
	       switch( ch ){
	       case '%':
		       ljust = len = zpad = maxwidth = 0;
		       longflag = pointflag = 0;
	       nextch:
		       ch = *format++;
		       switch( ch ){
		       case 0:
			       dostr( "**end of format**" , 0);
			       return;
		       case '-': ljust = 1; goto nextch;
		       case '0': /* set zero padding if len not set */
			       if(len==0 && !pointflag) zpad = '0';
		       case '1': case '2': case '3':
		       case '4': case '5': case '6':
		       case '7': case '8': case '9':
			       if (pointflag)
				 maxwidth = maxwidth*10 + ch - '0';
			       else
				 len = len*10 + ch - '0';
			       goto nextch;
		       case '*': 
			       if (pointflag)
				 maxwidth = va_arg( args, int );
			       else
				 len = va_arg( args, int );
			       goto nextch;
		       case '.': pointflag = 1; goto nextch;
		       case 'l': longflag = 1; goto nextch;
		       case 'u': case 'U':
			       /*fmtnum(value,base,dosign,ljust,len,zpad) */
			       if( longflag ){
				       value = va_arg( args, long );
			       } else {
				       value = va_arg( args, int );
			       }
			       fmtnum( value, 10,0, ljust, len, zpad ); break;
		       case 'o': case 'O':
			       /*fmtnum(value,base,dosign,ljust,len,zpad) */
			       if( longflag ){
				       value = va_arg( args, long );
			       } else {
				       value = va_arg( args, int );
			       }
			       fmtnum( value, 8,0, ljust, len, zpad ); break;
		       case 'd': case 'D':
			       if( longflag ){
				       value = va_arg( args, long );
			       } else {
				       value = va_arg( args, int );
			       }
			       fmtnum( value, 10,1, ljust, len, zpad ); break;
		       case 'x':
			       if( longflag ){
				       value = va_arg( args, long );
			       } else {
				       value = va_arg( args, int );
			       }
			       fmtnum( value, 16,0, ljust, len, zpad ); break;
		       case 'X':
			       if( longflag ){
				       value = va_arg( args, long );
			       } else {
				       value = va_arg( args, int );
			       }
			       fmtnum( value,-16,0, ljust, len, zpad ); break;
		       case 's':
			       strvalue = va_arg( args, char *);
			       if (maxwidth > 0 || !pointflag) {
				 if (pointflag && len > maxwidth)
				   len = maxwidth; /* Adjust padding */
				 fmtstr( strvalue,ljust,len,zpad, maxwidth);
			       }
			       break;
		       case 'c':
			       ch = va_arg( args, int );
			       dopr_outch( ch ); break;
                       case 'm':
#if HASSTRERROR
                               dostr(strerror(SyslogErrno), 0);
#else
                               if (SyslogErrno < 0 || SyslogErrno >= sys_nerr) 
                               {
                                   dostr("Error ", 0);
                                   fmtnum(SyslogErrno, 10, 0, 0, 0, 0);
                               }
                               else 
                                   dostr((char *)sys_errlist[SyslogErrno], 0);
#endif
			       break;

		       case '%': dopr_outch( ch ); continue;
		       default:
			       dostr(  "???????" , 0);
		       }
		       break;
	       default:
		       dopr_outch( ch );
		       break;
	       }
       }
       *output = 0;
}

void
fmtstr(  value, ljust, len, zpad, maxwidth )
       char *value;
       int ljust, len, zpad, maxwidth;
{
       int padlen, strlen;     /* amount to pad */

       if( value == 0 ){
	       value = "<NULL>";
       }
       for( strlen = 0; value[strlen]; ++ strlen ); /* strlen */
       if (strlen > maxwidth && maxwidth)
	 strlen = maxwidth;
       padlen = len - strlen;
       if( padlen < 0 ) padlen = 0;
       if( ljust ) padlen = -padlen;
       while( padlen > 0 ) {
	       dopr_outch( ' ' );
	       --padlen;
       }
       dostr( value, maxwidth );
       while( padlen < 0 ) {
	       dopr_outch( ' ' );
	       ++padlen;
       }
}

void
fmtnum(  value, base, dosign, ljust, len, zpad )
       long value;
       int base, dosign, ljust, len, zpad;
{
       int signvalue = 0;
       unsigned long uvalue;
       char convert[20];
       int place = 0;
       int padlen = 0; /* amount to pad */
       int caps = 0;

       /* DEBUGP(("value 0x%x, base %d, dosign %d, ljust %d, len %d, zpad %d\n",
	       value, base, dosign, ljust, len, zpad )); */
       uvalue = value;
       if( dosign ){
	       if( value < 0 ) {
		       signvalue = '-';
		       uvalue = -value;
	       }
       }
       if( base < 0 ){
	       caps = 1;
	       base = -base;
       }
       do{
	       convert[place++] =
		       (caps? "0123456789ABCDEF":"0123456789abcdef")
			[uvalue % (unsigned)base  ];
	       uvalue = (uvalue / (unsigned)base );
       }while(uvalue);
       convert[place] = 0;
       padlen = len - place;
       if( padlen < 0 ) padlen = 0;
       if( ljust ) padlen = -padlen;
       /* DEBUGP(( "str '%s', place %d, sign %c, padlen %d\n",
	       convert,place,signvalue,padlen)); */
       if( zpad && padlen > 0 ){
	       if( signvalue ){
		       dopr_outch( signvalue );
		       --padlen;
		       signvalue = 0;
	       }
	       while( padlen > 0 ){
		       dopr_outch( zpad );
		       --padlen;
	       }
       }
       while( padlen > 0 ) {
	       dopr_outch( ' ' );
	       --padlen;
       }
       if( signvalue ) dopr_outch( signvalue );
       while( place > 0 ) dopr_outch( convert[--place] );
       while( padlen < 0 ){
	       dopr_outch( ' ' );
	       ++padlen;
       }
}

void
dostr( str , cut)
     char *str;
     int cut;
{
  if (cut) {
    while(*str && cut-- > 0) dopr_outch(*str++);
  } else {
    while(*str) dopr_outch(*str++);
  }
}

void
dopr_outch( c )
       int c;
{
#if 0
       if( iscntrl(c) && c != '\n' && c != '\t' ){
	       c = '@' + (c & 0x1F);
	       if( DoprEnd == 0 || output < DoprEnd )
		       *output++ = '^';
       }
#endif
       if( DoprEnd == 0 || output < DoprEnd )
	       *output++ = c;
       else
		SnprfOverflow++;
}