mirror of https://github.com/vivier/EMILE.git
212 lines
7.7 KiB
C
212 lines
7.7 KiB
C
/*-
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* Copyright (c) 1986, 1988, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this
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software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
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LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
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*
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*
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* Extracted vsprinf & adapted by BenH for MountX, Wed, June 3 1998.
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* Added support for pascal strings.
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*/
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#include <stdarg.h>
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typedef unsigned long u_long;
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typedef unsigned int u_int;
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typedef unsigned char u_char;
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#define NBBY 8
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static char *ksprintn(u_long ul, int base, int *lenp, int prec);
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/*
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* Scaled down version of sprintf(3).
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*/
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int
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vsprintf(char *buf, const char *cfmt, va_list ap)
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{
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register const char *fmt = cfmt;
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register char *p, *bp;
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register int ch, base;
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u_long ul;
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int lflag, tmp, width, pstring;
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int prec, precspec;
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char padc;
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for (bp = buf; ; ) {
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padc = ' ';
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width = 0;
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prec = 0;
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precspec = 0;
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pstring = 0;
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while ((ch = *(u_char *)fmt++) != '%')
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if ((*bp++ = (char)ch) == '\0')
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return ((bp - buf) - 1);
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lflag = 0;
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reswitch: switch (ch = *(u_char *)fmt++) {
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case '0':
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padc = '0';
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goto reswitch;
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case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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for (width = 0;; ++fmt) {
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width = width * 10 + ch - '0';
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ch = *fmt;
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if (ch < '0' || ch > '9')
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break;
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}
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goto reswitch;
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case '#':
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pstring = 1;
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goto reswitch;
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case '*':
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width = va_arg(ap, int);
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goto reswitch;
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case '.':
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precspec = 1;
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if (*fmt == '*') {
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prec = va_arg(ap, int);
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++fmt;
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goto reswitch;
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}
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for (prec = 0;; ++fmt) {
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ch = *fmt;
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if (ch < '0' || ch > '9')
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break;
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prec = prec * 10 + ch - '0';
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}
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goto reswitch;
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case 'l':
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lflag = 1;
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goto reswitch;
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/* case 'b': ... break; XXX */
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case 'c':
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*bp++ = (char)va_arg(ap, int);
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break;
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/* case 'r': ... break; XXX */
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case 's':
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p = va_arg(ap, char *);
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if (pstring)
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{
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prec = precspec ? ((prec < *p) ? prec : *p) : *p;
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p++;
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precspec = 1;
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}
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while ((!precspec || (--prec >= 0)) && ((*bp = *p++) != 0))
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++bp;
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break;
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case 'd':
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ul = (unsigned long)(lflag ? va_arg(ap, long) : va_arg(ap, int));
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if ((long)ul < 0) {
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*bp++ = (char)'-';
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ul = (unsigned long)(-(long)ul);
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}
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base = 10;
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goto number;
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break;
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case 'o':
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ul = lflag ? va_arg(ap, u_long) : va_arg(ap,
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u_int);
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base = 8;
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goto number;
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break;
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case 'u':
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ul = lflag ? va_arg(ap, u_long) : va_arg(ap,
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u_int);
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base = 10;
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goto number;
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break;
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case 'p':
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*bp++ = '0';
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*bp++ = 'x';
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ul = (u_long)va_arg(ap, void *);
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base = 16;
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goto number;
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case 'x':
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case 'X':
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ul = lflag ? va_arg(ap, u_long) : va_arg(ap,
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u_int);
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base = 16;
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number: p = ksprintn(ul, base, &tmp, prec);
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if (width && (width -= tmp) > 0)
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while (width--)
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*bp++ = padc;
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while ((ch = *p--) != 0)
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*bp++ = (char)ch;
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break;
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default:
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*bp++ = '%';
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if (lflag)
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*bp++ = 'l';
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/* FALLTHROUGH */
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case '%':
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*bp++ = (char)ch;
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}
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}
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}
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/*
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* Put a number (base <= 16) in a buffer in reverse order; return an
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* optional length and a pointer to the NULL terminated (preceded?)
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* buffer.
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*/
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static char *
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ksprintn(u_long ul, int base, int *lenp, int prec)
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{ /* A long in base 8, plus NULL. */
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static char buf[sizeof(long) * NBBY / 3 + 4];
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register char *p;
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int i;
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p = buf;
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for(i=0;i<sizeof(buf);i++)
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buf[i] = 0;
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do {
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*++p = "0123456789abcdef"[ul % base];
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ul /= base;
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} while ((--prec > 0 || ul != 0) && p < buf + sizeof(buf) - 1);
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if (lenp)
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*lenp = p - buf;
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return (p);
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}
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