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- /* $Header: /home/hyperion/mu/christos/src/sys/tcsh-6.01/RCS/tc.printf.c,v 3.3 1991/11/26 04:41:23 christos Exp $ */
- /*
- * tc.printf.c: A public-domain, minimal printf/sprintf routine that prints
- * through the putchar() routine. Feel free to use for
- * anything... -- 7/17/87 Paul Placeway
- */
- /*-
- * Copyright (c) 1980, 1991 The Regents of the University of California.
- * 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 the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of 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 REGENTS 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 REGENTS 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.
- */
- #include "sh.h"
-
- RCSID("$Id: tc.printf.c,v 3.3 1991/11/26 04:41:23 christos Exp $")
-
- #ifdef lint
- #undef va_arg
- #define va_arg(a, b) (a ? (b) 0 : (b) 0)
- #endif
-
- #define INF 32766 /* should be bigger than any field to print */
-
- static unsigned char buf[128];
-
- static void xaddchar __P((int));
- static void doprnt __P((void (*) __P((int)), char *, va_list));
-
- static void
- doprnt(addchar, sfmt, ap)
- void (*addchar)();
- char *sfmt;
- va_list ap;
- {
- register unsigned char *f, *bp;
- register long l;
- register unsigned long u;
- register int i;
- register int fmt;
- register unsigned char pad = ' ';
- int flush_left = 0, f_width = 0, prec = INF, hash = 0, do_long = 0;
- int sign = 0;
- int attributes = 0;
-
-
- f = (unsigned char *) sfmt;
- for (; *f; f++) {
- if (*f != '%') { /* then just out the char */
- (*addchar) ((int) (*f | attributes));
- }
- else {
- f++; /* skip the % */
-
- if (*f == '-') { /* minus: flush left */
- flush_left = 1;
- f++;
- }
-
- if (*f == '0' || *f == '.') {
- /* padding with 0 rather than blank */
- pad = '0';
- f++;
- }
- if (*f == '*') { /* field width */
- f_width = va_arg(ap, int);
- f++;
- }
- else if (Isdigit(*f)) {
- f_width = atoi((char *) f);
- while (Isdigit(*f))
- f++; /* skip the digits */
- }
-
- if (*f == '.') { /* precision */
- f++;
- if (*f == '*') {
- prec = va_arg(ap, int);
- f++;
- }
- else if (Isdigit(*f)) {
- prec = atoi((char *) f);
- while (Isdigit(*f))
- f++; /* skip the digits */
- }
- }
-
- if (*f == '#') { /* alternate form */
- hash = 1;
- f++;
- }
-
- if (*f == 'l') { /* long format */
- do_long = 1;
- f++;
- }
-
- fmt = *f;
- if (Isupper(fmt)) {
- do_long = 1;
- fmt = Tolower(fmt);
- }
- bp = buf;
- switch (fmt) { /* do the format */
- case 'd':
- if (do_long)
- l = va_arg(ap, long);
- else
- l = (long) (va_arg(ap, int));
- if (l < 0) {
- sign = 1;
- l = -l;
- }
- do {
- *bp++ = l % 10 + '0';
- } while ((l /= 10) > 0);
- if (sign)
- *bp++ = '-';
- f_width = f_width - (bp - buf);
- if (!flush_left)
- while (f_width-- > 0)
- (*addchar) ((int) (pad | attributes));
- for (bp--; bp >= buf; bp--)
- (*addchar) ((int) (*bp | attributes));
- if (flush_left)
- while (f_width-- > 0)
- (*addchar) ((int) (' ' | attributes));
- break;
-
- case 'o':
- case 'x':
- case 'u':
- if (do_long)
- u = va_arg(ap, unsigned long);
- else
- u = (unsigned long) (va_arg(ap, unsigned));
- if (fmt == 'u') { /* unsigned decimal */
- do {
- *bp++ = u % 10 + '0';
- } while ((u /= 10) > 0);
- }
- else if (fmt == 'o') { /* octal */
- do {
- *bp++ = u % 8 + '0';
- } while ((u /= 8) > 0);
- if (hash)
- *bp++ = '0';
- }
- else if (fmt == 'x') { /* hex */
- do {
- i = u % 16;
- if (i < 10)
- *bp++ = i + '0';
- else
- *bp++ = i - 10 + 'a';
- } while ((u /= 16) > 0);
- if (hash) {
- *bp++ = 'x';
- *bp++ = '0';
- }
- }
- i = f_width - (bp - buf);
- if (!flush_left)
- while (i-- > 0)
- (*addchar) ((int) (pad | attributes));
- for (bp--; bp >= buf; bp--)
- (*addchar) ((int) (*bp | attributes));
- if (flush_left)
- while (i-- > 0)
- (*addchar) ((int) (' ' | attributes));
- break;
-
-
- case 'c':
- i = va_arg(ap, int);
- (*addchar) ((int) (i | attributes));
- break;
-
- case 's':
- bp = va_arg(ap, unsigned char *);
- if (!bp)
- bp = (unsigned char *) "(nil)";
- f_width = f_width - strlen((char *) bp);
- if (!flush_left)
- while (f_width-- > 0)
- (*addchar) ((int) (pad | attributes));
- for (i = 0; *bp && i < prec; i++) {
- (*addchar) ((int) (*bp | attributes));
- bp++;
- }
- if (flush_left)
- while (f_width-- > 0)
- (*addchar) ((int) (' ' | attributes));
-
- break;
-
- case 'a':
- attributes = va_arg(ap, int);
- break;
-
- case '%':
- (*addchar) ((int) ('%' | attributes));
- break;
-
- default:
- break;
- }
- flush_left = 0, f_width = 0, prec = INF, hash = 0, do_long = 0;
- sign = 0;
- pad = ' ';
- }
- }
- }
-
-
- static unsigned char *xstring;
- static void
- xaddchar(c)
- int c;
- {
- *xstring++ = c;
- }
-
-
- void
- /*VARARGS*/
- #if __STDC__
- xsprintf(char *str, char *fmt, ...)
- #else
- xsprintf(va_alist)
- va_dcl
- #endif
- {
- va_list va;
- #if __STDC__
- va_start(va, fmt);
- #else
- char *str, *fmt;
-
- va_start(va);
- str = va_arg(va, char *);
- fmt = va_arg(va, char *);
- #endif
-
- xstring = (unsigned char *) str;
- doprnt(xaddchar, fmt, va);
- va_end(va);
- *xstring++ = '\0';
- }
-
-
- void
- /*VARARGS*/
- #if __STDC__
- xprintf(char *fmt, ...)
- #else
- xprintf(va_alist)
- va_dcl
- #endif
- {
- va_list va;
- #if __STDC__
- va_start(va, fmt);
- #else
- char *fmt;
-
- va_start(va);
- fmt = va_arg(va, char *);
- #endif
- doprnt(xputchar, fmt, va);
- va_end(va);
- }
-
-
- void
- xvprintf(fmt, va)
- char *fmt;
- va_list va;
- {
- doprnt(xputchar, fmt, va);
- }
-
- void
- xvsprintf(str, fmt, va)
- char *str;
- char *fmt;
- va_list va;
- {
- xstring = (unsigned char *) str;
- doprnt(xaddchar, fmt, va);
- *xstring++ = '\0';
- }
-