1 /* vprint.c -- v[fs]printf() for 4.[23] BSD systems. */
2
3 /* Copyright (C) 1987,1989 Free Software Foundation, Inc.
4
5 This file is part of GNU Bash, the Bourne Again SHell.
6
7 Bash is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
11
12 Bash is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include <config.h>
22
23 #if defined (USE_VFPRINTF_EMULATION)
24
25 #include <stdio.h>
26
27 #if !defined (NULL)
28 # if defined (__STDC__)
29 # define NULL ((void *)0)
30 # else
31 # define NULL 0x0
32 # endif /* __STDC__ */
33 #endif /* !NULL */
34
35 /*
36 * Beware! Don't trust the value returned by either of these functions; it
37 * seems that pre-4.3-tahoe implementations of _doprnt () return the first
38 * argument, i.e. a char *.
39 */
40 #include <varargs.h>
41
42 int
vfprintf(iop,fmt,ap)43 vfprintf (iop, fmt, ap)
44 FILE *iop;
45 char *fmt;
46 va_list ap;
47 {
48 int len;
49 char localbuf[BUFSIZ];
50
51 if (iop->_flag & _IONBF)
52 {
53 iop->_flag &= ~_IONBF;
54 iop->_ptr = iop->_base = localbuf;
55 len = _doprnt (fmt, ap, iop);
56 (void) fflush (iop);
57 iop->_flag |= _IONBF;
58 iop->_base = NULL;
59 iop->_bufsiz = 0;
60 iop->_cnt = 0;
61 }
62 else
63 len = _doprnt (fmt, ap, iop);
64 return (ferror (iop) ? EOF : len);
65 }
66
67 /*
68 * Ditto for vsprintf
69 */
70 int
vsprintf(str,fmt,ap)71 vsprintf (str, fmt, ap)
72 char *str, *fmt;
73 va_list ap;
74 {
75 FILE f;
76 int len;
77
78 f._flag = _IOWRT|_IOSTRG;
79 f._ptr = str;
80 f._cnt = 32767;
81 len = _doprnt (fmt, ap, &f);
82 *f._ptr = 0;
83 return (len);
84 }
85 #endif /* USE_VFPRINTF_EMULATION */
86