500 lines
9.5 KiB
C
500 lines
9.5 KiB
C
/*
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* Copyright (c) 1989 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. All advertising materials mentioning features or use of this 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 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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#ifndef lint
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#if !defined(SHELL) && !defined(BUILTIN)
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char copyright[] =
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"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
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All rights reserved.\n";
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#endif
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#endif /* not lint */
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#ifndef lint
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/*static char sccsid[] = "from: @(#)printf.c 5.9 (Berkeley) 6/1/90";*/
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static char rcsid[] = "$Id: printf.c,v 1.9 1993/11/25 04:42:11 jtc Exp $";
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#endif /* not lint */
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <locale.h>
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#include <err.h>
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static int print_escape_str __P((const char *));
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static int print_escape __P((const char *));
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static int getchr __P((void));
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static double getdouble __P((void));
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static int getint __P((void));
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static long getlong __P((void));
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static char *getstr __P((void));
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static char *mklong __P((char *, int));
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static void usage __P((void));
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static int rval;
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static char **gargv;
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#define isodigit(c) ((c) >= '0' && (c) <= '7')
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#define octtobin(c) ((c) - '0')
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#define hextobin(c) ((c) >= 'A' && (c) <= 'F' ? c - 'A' + 10 : (c) >= 'a' && (c) <= 'f' ? c - 'a' + 10 : c - '0')
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#ifdef SHELL
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#define main printfcmd
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#include "../../bin/sh/bltin/bltin.h"
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#ifdef __STDC__
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#include <stdarg.h>
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#else
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#include <vararg.h>
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#endif
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static void
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#ifdef __STDC__
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warnx(const char *fmt, ...)
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#else
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warnx(fmt, va_alist)
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const char *fmt;
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va_dcl
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#endif
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{
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char buf[64];
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va_list ap;
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#ifdef __STDC__
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va_start(ap, fmt);
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#else
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va_start(ap);
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#endif
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vsprintf(buf, fmt, ap);
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va_end(ap);
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error(buf);
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}
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#endif /* SHELL */
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#define PF(f, func) { \
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if (fieldwidth) \
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if (precision) \
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(void)printf(f, fieldwidth, precision, func); \
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else \
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(void)printf(f, fieldwidth, func); \
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else if (precision) \
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(void)printf(f, precision, func); \
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else \
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(void)printf(f, func); \
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}
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int
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#ifdef BUILTIN
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progprintf(argc, argv)
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#else
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main(argc, argv)
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#endif
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int argc;
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char **argv;
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{
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register char *fmt, *start;
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register int fieldwidth, precision;
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char convch, nextch;
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char *format;
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int ch;
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#if !defined(SHELL) && !defined(BUILTIN)
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setlocale (LC_ALL, "");
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#endif
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while ((ch = getopt(argc, argv, "")) != -1) {
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switch (ch) {
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case '?':
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default:
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usage();
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return (1);
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}
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}
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argc -= optind;
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argv += optind;
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if (argc < 1) {
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usage();
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return (1);
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}
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format = *argv;
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gargv = ++argv;
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#define SKIP1 "#-+ 0"
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#define SKIP2 "*0123456789"
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do {
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/*
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* Basic algorithm is to scan the format string for conversion
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* specifications -- once one is found, find out if the field
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* width or precision is a '*'; if it is, gather up value.
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* Note, format strings are reused as necessary to use up the
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* provided arguments, arguments of zero/null string are
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* provided to use up the format string.
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*/
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/* find next format specification */
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for (fmt = format; *fmt; fmt++) {
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switch (*fmt) {
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case '%':
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start = fmt++;
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if (*fmt == '%') {
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putchar ('%');
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break;
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} else if (*fmt == 'b') {
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char *p = getstr();
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if (print_escape_str(p)) {
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return (rval);
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}
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break;
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}
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/* skip to field width */
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for (; index(SKIP1, *fmt); ++fmt) ;
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fieldwidth = *fmt == '*' ? getint() : 0;
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/* skip to possible '.', get following precision */
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for (; index(SKIP2, *fmt); ++fmt) ;
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if (*fmt == '.')
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++fmt;
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precision = *fmt == '*' ? getint() : 0;
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for (; index(SKIP2, *fmt); ++fmt) ;
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if (!*fmt) {
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warnx ("missing format character");
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rval = 1;
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return; /* XXX */
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}
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convch = *fmt;
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nextch = *(fmt + 1);
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*(fmt + 1) = '\0';
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switch(convch) {
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case 'c': {
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char p = getchr();
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PF(start, p);
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break;
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}
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case 's': {
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char *p = getstr();
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PF(start, p);
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break;
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}
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case 'd':
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case 'i':
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case 'o':
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case 'u':
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case 'x':
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case 'X': {
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char *f = mklong(start, convch);
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long p = getlong();
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PF(f, p);
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break;
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}
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case 'e':
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case 'E':
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case 'f':
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case 'g':
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case 'G': {
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double p = getdouble();
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PF(start, p);
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break;
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}
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default:
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warnx ("%s: invalid directive", start);
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rval = 1;
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}
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*(fmt + 1) = nextch;
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break;
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case '\\':
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fmt += print_escape(fmt);
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break;
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default:
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putchar (*fmt);
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break;
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}
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}
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} while (gargv > argv && *gargv);
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return (rval);
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}
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/*
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* Print SysV echo(1) style escape string
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* Halts processing string and returns 1 if a \c escape is encountered.
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*/
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static int
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print_escape_str(str)
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register const char *str;
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{
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int value;
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int c;
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while (*str) {
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if (*str == '\\') {
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str++;
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/*
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* %b string octal constants are not like those in C.
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* They start with a \0, and are followed by 0, 1, 2,
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* or 3 octal digits.
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*/
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if (*str == '0') {
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str++;
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for (c = 3, value = 0; c-- && isodigit(*str); str++) {
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value <<= 3;
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value += octtobin(*str);
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}
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putchar (value);
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str--;
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} else if (*str == 'c') {
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return 1;
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} else {
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str--;
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str += print_escape(str);
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}
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} else {
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putchar (*str);
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}
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str++;
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}
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return 0;
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}
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/*
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* Print "standard" escape characters
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*/
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static int
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print_escape(str)
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register const char *str;
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{
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const char *start = str;
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int value;
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int c;
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str++;
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switch (*str) {
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case '0': case '1': case '2': case '3':
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case '4': case '5': case '6': case '7':
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for (c = 3, value = 0; c-- && isodigit(*str); str++) {
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value <<= 3;
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value += octtobin(*str);
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}
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putchar(value);
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return str - start - 1;
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/* NOTREACHED */
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case 'x':
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str++;
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for (value = 0; isxdigit(*str); str++) {
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value <<= 4;
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value += hextobin(*str);
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}
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if (value > UCHAR_MAX) {
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warnx ("escape sequence out of range for character");
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rval = 1;
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}
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putchar (value);
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return str - start - 1;
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/* NOTREACHED */
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case '\\': /* backslash */
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putchar('\\');
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break;
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case '\'': /* single quote */
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putchar('\'');
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break;
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case '"': /* double quote */
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putchar('"');
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break;
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case 'a': /* alert */
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#ifdef __STDC__
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putchar('\a');
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#else
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putchar(007);
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#endif
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break;
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case 'b': /* backspace */
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putchar('\b');
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break;
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case 'e': /* escape */
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#ifdef __GNUC__
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putchar('\e');
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#else
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putchar(033);
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#endif
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break;
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case 'f': /* form-feed */
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putchar('\f');
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break;
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case 'n': /* newline */
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putchar('\n');
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break;
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case 'r': /* carriage-return */
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putchar('\r');
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break;
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case 't': /* tab */
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putchar('\t');
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break;
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case 'v': /* vertical-tab */
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putchar('\v');
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break;
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default:
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putchar(*str);
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warnx("unknown escape sequence `\\%c'", *str);
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rval = 1;
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}
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return 1;
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}
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static char *
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mklong(str, ch)
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char *str, ch;
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{
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static char copy[64];
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int len;
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len = strlen(str) + 2;
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(void) memmove(copy, str, len - 3);
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copy[len - 3] = 'l';
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copy[len - 2] = ch;
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copy[len - 1] = '\0';
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return (copy);
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}
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static int
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getchr()
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{
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if (!*gargv)
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return((int)'\0');
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return((int)**gargv++);
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}
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static char *
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getstr()
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{
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if (!*gargv)
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return("");
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return(*gargv++);
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}
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static char *number = "+-.0123456789";
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static int
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getint()
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{
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if (!*gargv)
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return(0);
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if (index(number, **gargv))
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return(atoi(*gargv++));
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return 0;
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}
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static long
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getlong()
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{
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long val;
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char *ep;
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if (!*gargv)
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return(0L);
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if (**gargv == '\"' || **gargv == '\'') {
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val = gargv[0][1];
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gargv++;
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return val;
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}
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val = strtol (*gargv, &ep, 0);
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if (*ep) {
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warnx ("incompletely converted argument: %s", *gargv);
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rval = 1;
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}
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gargv++;
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return val;
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}
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static double
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getdouble()
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{
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double val;
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char *ep;
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if (!*gargv)
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return(0.0);
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if (**gargv == '\"' || **gargv == '\'') {
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val = gargv[0][1];
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gargv++;
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return val;
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}
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val = strtod (*gargv, &ep);
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if (*ep) {
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warnx ("incompletely converted argument: %s", *gargv);
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rval = 1;
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}
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gargv++;
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return val;
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}
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static void
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usage()
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{
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(void)fprintf(stderr, "usage: printf format [arg ...]\n");
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}
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