usr/src/lib/libc/port/print/sprintf.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include "lint.h"
  33 #include <mtlib.h>
  34 #include <stdarg.h>
  35 #include <values.h>
  36 #include <errno.h>
  37 #include <thread.h>
  38 #include <synch.h>
  39 #include <sys/types.h>
  40 #include "print.h"
  41 #include "libc.h"
  42
  43 /*VARARGS2*/
  44 int
  45 sprintf(char *string, const char *format, ...)
  46 {
  47         ssize_t count;
  48         FILE siop;
  49         va_list ap;
  50
  51         siop._cnt = MAXINT;
  52         siop._base = siop._ptr = (unsigned char *)string;
  53         siop._flag = _IOREAD; /* distinguish dummy file descriptor */
  54         va_start(ap, format);
  55
  56         count = _ndoprnt(format, ap, &siop, 0);
  57         va_end(ap);
  58         *siop._ptr = '\0'; /* plant terminating null character */
  59         if (count == EOF) {
  60                 return (EOF);
  61         }
  62
  63         /* check for overflow */
  64         if ((size_t)count > MAXINT) {
  65                 errno = EOVERFLOW;
  66                 return (EOF);
  67         } else {
  68                 return ((int)count);
  69         }
  70 }
  71
  72 #ifndef _LP64
  73
  74 /*
  75  * 32-bit shadow function of sprintf().
  76  * When using the c89 compiler to build 32-bit applications, the size
  77  * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
  78  * The shadow function uses 32-bit size of intmax_t for %j conversion.
  79  * The #pragma redefine_extname in <stdio.h> selects the proper routine
  80  * at compile time for the user application.
  81  * NOTE: this function is only available in the 32-bit library.
  82  */
  83
  84 int
  85 _sprintf_c89(char *string, const char *format, ...)
  86 {
  87         ssize_t count;
  88         va_list ap;
  89
  90         va_start(ap, format);
  91         count = _vsprintf_c89(string, format, ap);
  92         va_end(ap);
  93         return ((int)count);
  94 }
  95
  96 #endif  /* _LP64 */