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453 lines
9.7 KiB
C
453 lines
9.7 KiB
C
/* $Header: /p/tcsh/cvsroot/tcsh/tc.printf.c,v 3.35 2006/03/02 18:46:45 christos Exp $ */
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/*
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* tc.printf.c: A public-domain, minimal printf/sprintf routine that prints
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* through the putchar() routine. Feel free to use for
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* anything... -- 7/17/87 Paul Placeway
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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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. 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 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 PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY 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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#include "sh.h"
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RCSID("$tcsh: tc.printf.c,v 3.35 2006/03/02 18:46:45 christos Exp $")
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#ifdef lint
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#undef va_arg
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#define va_arg(a, b) (a ? (b) 0 : (b) 0)
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#endif
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#define INF INT_MAX /* should be bigger than any field to print */
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static char snil[] = "(nil)";
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static void xaddchar (int);
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static void doprnt (void (*) (int), const char *, va_list);
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static void
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doprnt(void (*addchar) (int), const char *sfmt, va_list ap)
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{
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char *bp;
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const char *f;
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#ifdef SHORT_STRINGS
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const Char *Bp;
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#endif /* SHORT_STRINGS */
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#ifdef HAVE_LONG_LONG
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long long l;
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unsigned long long u;
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#else
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long l;
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unsigned long u;
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#endif
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char buf[(CHAR_BIT * sizeof (l) + 2) / 3 + 1]; /* Octal: 3 bits per char */
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int i;
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int fmt;
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unsigned char pad = ' ';
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int flush_left = 0, f_width = 0, prec = INF, hash = 0;
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int do_long = 0, do_size_t = 0;
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int sign = 0;
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int attributes = 0;
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f = sfmt;
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for (; *f; f++) {
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if (*f != '%') { /* then just out the char */
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(*addchar) (((unsigned char)*f) | attributes);
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}
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else {
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f++; /* skip the % */
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if (*f == '-') { /* minus: flush left */
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flush_left = 1;
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f++;
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}
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if (*f == '0' || *f == '.') {
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/* padding with 0 rather than blank */
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pad = '0';
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f++;
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}
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if (*f == '*') { /* field width */
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f_width = va_arg(ap, int);
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f++;
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}
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else if (isdigit((unsigned char) *f)) {
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f_width = atoi(f);
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while (isdigit((unsigned char) *f))
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f++; /* skip the digits */
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}
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if (*f == '.') { /* precision */
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f++;
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if (*f == '*') {
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prec = va_arg(ap, int);
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f++;
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}
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else if (isdigit((unsigned char) *f)) {
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prec = atoi(f);
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while (isdigit((unsigned char) *f))
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f++; /* skip the digits */
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}
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}
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if (*f == '#') { /* alternate form */
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hash = 1;
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f++;
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}
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if (*f == 'l') { /* long format */
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do_long++;
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f++;
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if (*f == 'l') {
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do_long++;
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f++;
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}
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}
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if (*f == 'z') { /* size_t format */
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do_size_t++;
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f++;
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}
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fmt = (unsigned char) *f;
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if (fmt != 'S' && fmt != 'Q' && isupper(fmt)) {
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do_long = 1;
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fmt = tolower(fmt);
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}
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bp = buf;
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switch (fmt) { /* do the format */
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case 'd':
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switch (do_long) {
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case 0:
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if (do_size_t)
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l = (long) (va_arg(ap, size_t));
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else
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l = (long) (va_arg(ap, int));
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break;
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case 1:
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#ifndef HAVE_LONG_LONG
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default:
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#endif
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l = va_arg(ap, long);
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break;
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#ifdef HAVE_LONG_LONG
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default:
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l = va_arg(ap, long long);
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break;
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#endif
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}
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if (l < 0) {
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sign = 1;
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l = -l;
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}
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do {
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*bp++ = (char) (l % 10) + '0';
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} while ((l /= 10) > 0);
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if (sign)
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*bp++ = '-';
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f_width = f_width - (int) (bp - buf);
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if (!flush_left)
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while (f_width-- > 0)
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(*addchar) (pad | attributes);
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for (bp--; bp >= buf; bp--)
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(*addchar) (((unsigned char) *bp) | attributes);
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if (flush_left)
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while (f_width-- > 0)
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(*addchar) (' ' | attributes);
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break;
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case 'p':
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do_long = 1;
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hash = 1;
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fmt = 'x';
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/*FALLTHROUGH*/
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case 'o':
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case 'x':
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case 'u':
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switch (do_long) {
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case 0:
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if (do_size_t)
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u = va_arg(ap, size_t);
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else
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u = va_arg(ap, unsigned int);
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break;
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case 1:
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#ifndef HAVE_LONG_LONG
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default:
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#endif
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u = va_arg(ap, unsigned long);
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break;
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#ifdef HAVE_LONG_LONG
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default:
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u = va_arg(ap, unsigned long long);
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break;
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#endif
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}
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if (fmt == 'u') { /* unsigned decimal */
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do {
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*bp++ = (char) (u % 10) + '0';
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} while ((u /= 10) > 0);
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}
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else if (fmt == 'o') { /* octal */
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do {
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*bp++ = (char) (u % 8) + '0';
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} while ((u /= 8) > 0);
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if (hash)
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*bp++ = '0';
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}
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else if (fmt == 'x') { /* hex */
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do {
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i = (int) (u % 16);
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if (i < 10)
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*bp++ = i + '0';
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else
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*bp++ = i - 10 + 'a';
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} while ((u /= 16) > 0);
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if (hash) {
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*bp++ = 'x';
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*bp++ = '0';
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}
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}
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i = f_width - (int) (bp - buf);
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if (!flush_left)
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while (i-- > 0)
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(*addchar) (pad | attributes);
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for (bp--; bp >= buf; bp--)
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(*addchar) (((unsigned char) *bp) | attributes);
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if (flush_left)
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while (i-- > 0)
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(*addchar) (' ' | attributes);
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break;
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case 'c':
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i = va_arg(ap, int);
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(*addchar) (i | attributes);
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break;
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case 'S':
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case 'Q':
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#ifdef SHORT_STRINGS
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Bp = va_arg(ap, Char *);
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if (!Bp) {
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bp = NULL;
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goto lcase_s;
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}
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f_width = f_width - Strlen(Bp);
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if (!flush_left)
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while (f_width-- > 0)
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(*addchar) ((int) (pad | attributes));
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for (i = 0; *Bp && i < prec; i++) {
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char cbuf[MB_LEN_MAX];
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size_t pos, len;
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if (fmt == 'Q' && *Bp & QUOTE)
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(*addchar) ('\\' | attributes);
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len = one_wctomb(cbuf, *Bp & CHAR);
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for (pos = 0; pos < len; pos++)
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(*addchar) ((unsigned char)cbuf[pos] | attributes
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| (*Bp & ATTRIBUTES));
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Bp++;
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}
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if (flush_left)
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while (f_width-- > 0)
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(*addchar) (' ' | attributes);
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break;
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#endif /* SHORT_STRINGS */
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case 's':
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case 'q':
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bp = va_arg(ap, char *);
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lcase_s:
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if (!bp)
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bp = snil;
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f_width = f_width - strlen(bp);
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if (!flush_left)
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while (f_width-- > 0)
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(*addchar) (pad | attributes);
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for (i = 0; *bp && i < prec; i++) {
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if (fmt == 'q' && *bp & QUOTE)
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(*addchar) ('\\' | attributes);
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(*addchar) (((unsigned char) *bp & TRIM) | attributes);
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bp++;
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}
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if (flush_left)
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while (f_width-- > 0)
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(*addchar) (' ' | attributes);
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break;
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case 'a':
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attributes = va_arg(ap, int);
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break;
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case '%':
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(*addchar) ('%' | attributes);
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break;
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default:
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break;
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}
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flush_left = 0, f_width = 0, prec = INF, hash = 0;
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do_size_t = 0, do_long = 0;
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sign = 0;
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pad = ' ';
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}
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}
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}
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static char *xstring, *xestring;
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static void
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xaddchar(int c)
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{
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if (xestring == xstring)
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*xstring = '\0';
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else
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*xstring++ = (char) c;
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}
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pret_t
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/*VARARGS*/
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xsnprintf(char *str, size_t size, const char *fmt, ...)
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{
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va_list va;
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va_start(va, fmt);
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xstring = str;
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xestring = str + size - 1;
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doprnt(xaddchar, fmt, va);
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va_end(va);
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*xstring++ = '\0';
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#ifdef PURIFY
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return 1;
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#endif
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}
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pret_t
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/*VARARGS*/
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xprintf(const char *fmt, ...)
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{
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va_list va;
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va_start(va, fmt);
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doprnt(xputchar, fmt, va);
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va_end(va);
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#ifdef PURIFY
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return 1;
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#endif
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}
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pret_t
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xvprintf(const char *fmt, va_list va)
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{
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doprnt(xputchar, fmt, va);
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#ifdef PURIFY
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return 1;
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#endif
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}
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pret_t
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xvsnprintf(char *str, size_t size, const char *fmt, va_list va)
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{
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xstring = str;
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xestring = str + size - 1;
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doprnt(xaddchar, fmt, va);
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*xstring++ = '\0';
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#ifdef PURIFY
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return 1;
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#endif
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}
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char *
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xvasprintf(const char *fmt, va_list va)
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{
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size_t size;
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char *buf;
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buf = NULL;
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size = 2048; /* Arbitrary */
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for (;;) {
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va_list copy;
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buf = xrealloc(buf, size);
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xstring = buf;
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xestring = buf + size - 1;
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va_copy(copy, va);
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doprnt(xaddchar, fmt, copy);
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va_end(copy);
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if (xstring < xestring)
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break;
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size *= 2;
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}
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*xstring++ = '\0';
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return xrealloc(buf, xstring - buf);
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}
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char *
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xasprintf(const char *fmt, ...)
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{
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va_list va;
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char *ret;
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va_start (va, fmt);
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ret = xvasprintf(fmt, va);
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va_end(va);
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return ret;
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}
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#ifdef PURIFY
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/* Purify uses (some of..) the following functions to output memory-use
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* debugging info. Given all the messing with file descriptors that
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* tcsh does, the easiest way I could think of to get it (Purify) to
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* print anything was by replacing some standard functions with
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* ones that do tcsh output directly - see dumb hook in doreaddirs()
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* (sh.dir.c) -sg
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*/
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#ifndef FILE
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#define FILE int
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#endif
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int
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fprintf(FILE *fp, const char* fmt, ...)
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{
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va_list va;
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va_start(va, fmt);
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doprnt(xputchar, fmt, va);
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va_end(va);
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return 1;
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}
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int
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vfprintf(FILE *fp, const char *fmt, va_list va)
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{
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doprnt(xputchar, fmt, va);
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return 1;
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}
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#endif /* PURIFY */
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