usr.sbin/sup/source/vprintf.c

   1 /*      $NetBSD: vprintf.c,v 1.8 2002/07/10 20:19:48 wiz Exp $  */
   2
   3 /*
   4  * Copyright (c) 1991 Carnegie Mellon University
   5  * All Rights Reserved.
   6  *
   7  * Permission to use, copy, modify and distribute this software and its
   8  * documentation is hereby granted, provided that both the copyright
   9  * notice and this permission notice appear in all copies of the
  10  * software, derivative works or modified versions, and any portions
  11  * thereof, and that both notices appear in supporting documentation.
  12  *
  13  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  14  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  15  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  16  *
  17  * Carnegie Mellon requests users of this software to return to
  18  *
  19  *  Software Distribution Coordinator   or   Software.Distribution@CS.CMU.EDU
  20  *  School of Computer Science
  21  *  Carnegie Mellon University
  22  *  Pittsburgh PA 15213-3890
  23  *
  24  * any improvements or extensions that they make and grant Carnegie the rights
  25  * to redistribute these changes.
  26  */
  27 /*
  28  * varargs versions of printf routines
  29  *
  30  **********************************************************************
  31  * HISTORY
  32  * Revision 2.5  89/09/08  18:15:55  mbj
  33  *      Use _doprnt() for the Multimax (an "old" architecture).
  34  *      [89/09/08            mbj]
  35  *
  36  * Revision 2.4  89/08/03  14:40:10  mja
  37  *      Add vsnprintf() routine.
  38  *      [89/07/12            mja]
  39  *
  40  *      Terminate vsprintf() string with null byte.
  41  *      [89/04/21            mja]
  42  *
  43  *      Change to use new hidden name for _doprnt on MIPS.
  44  *      [89/04/18            mja]
  45  *
  46  * Revision 2.3  89/06/10  14:13:43  gm0w
  47  *      Added putc of NULL byte to vsprintf.
  48  *      [89/06/10            gm0w]
  49  *
  50  * Revision 2.2  88/12/13  13:53:17  gm0w
  51  *      From Brad White.
  52  *      [88/12/13            gm0w]
  53  ************************************************************
  54  */
  55
  56 #include <stdio.h>
  57 #include <stdarg.h>
  58
  59 #ifdef _IOSTRG
  60 #define STRFLAG (_IOSTRG|_IOWRT)/* no _IOWRT: avoid stdio bug */
  61 #else
  62 #define STRFLAG (_IOREAD)       /* XXX: Assume svr4 stdio */
  63 #endif
  64
  65 #ifdef DOPRINT_VA
  66 /*
  67  *  system provides _doprnt_va routine
  68  */
  69 #define _doprnt _doprnt_va
  70 #else
  71 /*
  72  * system provides _doprnt routine
  73  */
  74 #define _doprnt_va _doprnt
  75 #endif
  76
  77
  78 #ifdef NEED_VPRINTF
  79 int
  80 vprintf(fmt, args)
  81         char *fmt;
  82         va_list args;
  83 {
  84         _doprnt(fmt, args, stdout);
  85         return (ferror(stdout) ? EOF : 0);
  86 }
  87
  88 int
  89 vfprintf(f, fmt, args)
  90         FILE *f;
  91         char *fmt;
  92         va_list args;
  93 {
  94         _doprnt(fmt, args, f);
  95         return (ferror(f) ? EOF : 0);
  96 }
  97
  98 int
  99 vsprintf(s, fmt, args)
 100         char *s, *fmt;
 101         va_list args;
 102 {
 103         FILE fakebuf;
 104
 105         fakebuf._flag = STRFLAG;
 106         fakebuf._base = (void *) s;
 107         fakebuf._ptr = (void *) s;
 108         fakebuf._cnt = 32767;
 109         _doprnt(fmt, args, &fakebuf);
 110         putc('\0', &fakebuf);
 111         return (strlen(s));
 112 }
 113 #endif                          /* NEED_VPRINTF */
 114
 115 #if     defined(NEED_VSNPRINTF) || defined(NEED_VPRINTF)
 116 int
 117 vsnprintf(s, n, fmt, args)
 118         char *s, *fmt;
 119         va_list args;
 120 {
 121         FILE fakebuf;
 122
 123         fakebuf._flag = STRFLAG;
 124         fakebuf._base = (void *) s;
 125         fakebuf._ptr = (void *) s;
 126         fakebuf._cnt = n - 1;
 127         fakebuf._file = -1;
 128         _doprnt(fmt, args, &fakebuf);
 129         fakebuf._cnt++;
 130         putc('\0', &fakebuf);
 131         if (fakebuf._cnt < 0)
 132                 fakebuf._cnt = 0;
 133         return (n - fakebuf._cnt - 1);
 134 }
 135 #endif                          /* NEED_VPRINTF || NEED_VSNPRINTF */