687 lines
14 KiB
C
687 lines
14 KiB
C
/*-
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* Copyright 2014 Garrett D'Amore <garrett@damore.org>
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* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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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* 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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/*
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* Important: This file is used both as a standalone program /usr/bin/printf
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* and as a builtin for /bin/sh (#define SHELL).
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*/
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#ifndef SHELL
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#ifndef lint
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static char const copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#endif
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#ifndef lint
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#if 0
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static char const sccsid[] = "@(#)printf.c 8.1 (Berkeley) 7/20/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/types.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <locale.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 <unistd.h>
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#include <wchar.h>
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#ifdef SHELL
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#define main printfcmd
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#include "bltin/bltin.h"
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#include "options.h"
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#endif
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#define PF(f, func) do { \
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char *b = NULL; \
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if (havewidth) \
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if (haveprec) \
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(void)asprintf(&b, f, fieldwidth, precision, func); \
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else \
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(void)asprintf(&b, f, fieldwidth, func); \
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else if (haveprec) \
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(void)asprintf(&b, f, precision, func); \
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else \
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(void)asprintf(&b, f, func); \
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if (b) { \
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(void)fputs(b, stdout); \
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free(b); \
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} \
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} while (0)
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static int asciicode(void);
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static char *printf_doformat(char *, int *);
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static int escape(char *, int, size_t *);
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static int getchr(void);
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static int getfloating(long double *, int);
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static int getint(int *);
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static int getnum(intmax_t *, uintmax_t *, int);
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static const char
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*getstr(void);
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static char *mknum(char *, char);
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static void usage(void);
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static const char digits[] = "0123456789";
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static char end_fmt[1];
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static int myargc;
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static char **myargv;
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static char **gargv;
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static char **maxargv;
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int
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main(int argc, char *argv[])
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{
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size_t len;
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int end, rval;
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char *format, *fmt, *start;
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#ifndef SHELL
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int ch;
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(void) setlocale(LC_ALL, "");
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#endif
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#ifdef SHELL
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nextopt("");
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argc -= argptr - argv;
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argv = argptr;
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#else
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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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argc -= optind;
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argv += optind;
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#endif
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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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#ifdef SHELL
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INTOFF;
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#endif
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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. Note,
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* format strings are reused as necessary to use up the provided
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* arguments, arguments of zero/null string are provided to use
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* up the format string.
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*/
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fmt = format = *argv;
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escape(fmt, 1, &len); /* backslash interpretation */
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rval = end = 0;
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gargv = ++argv;
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for (;;) {
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maxargv = gargv;
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myargv = gargv;
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for (myargc = 0; gargv[myargc]; myargc++)
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/* nop */;
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start = fmt;
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while (fmt < format + len) {
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if (fmt[0] == '%') {
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fwrite(start, 1, fmt - start, stdout);
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if (fmt[1] == '%') {
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/* %% prints a % */
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putchar('%');
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fmt += 2;
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} else {
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fmt = printf_doformat(fmt, &rval);
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if (fmt == NULL || fmt == end_fmt) {
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#ifdef SHELL
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INTON;
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#endif
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return (fmt == NULL ? 1 : rval);
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}
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end = 0;
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}
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start = fmt;
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} else
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fmt++;
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if (gargv > maxargv)
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maxargv = gargv;
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}
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gargv = maxargv;
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if (end == 1) {
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warnx("missing format character");
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#ifdef SHELL
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INTON;
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#endif
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return (1);
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}
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fwrite(start, 1, fmt - start, stdout);
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if (!*gargv) {
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#ifdef SHELL
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INTON;
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#endif
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return (rval);
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}
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/* Restart at the beginning of the format string. */
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fmt = format;
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end = 1;
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}
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/* NOTREACHED */
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}
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static char *
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printf_doformat(char *fmt, int *rval)
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{
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static const char skip1[] = "#'-+ 0";
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int fieldwidth, haveprec, havewidth, mod_ldbl, precision;
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char convch, nextch;
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char start[strlen(fmt) + 1];
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char **fargv;
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char *dptr;
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int l;
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dptr = start;
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*dptr++ = '%';
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*dptr = 0;
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fmt++;
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/* look for "n$" field index specifier */
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l = strspn(fmt, digits);
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if ((l > 0) && (fmt[l] == '$')) {
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int idx = atoi(fmt);
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if (idx <= myargc) {
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gargv = &myargv[idx - 1];
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} else {
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gargv = &myargv[myargc];
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}
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if (gargv > maxargv)
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maxargv = gargv;
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fmt += l + 1;
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/* save format argument */
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fargv = gargv;
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} else {
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fargv = NULL;
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}
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/* skip to field width */
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while (*fmt && strchr(skip1, *fmt) != NULL) {
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*dptr++ = *fmt++;
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*dptr = 0;
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}
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if (*fmt == '*') {
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fmt++;
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l = strspn(fmt, digits);
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if ((l > 0) && (fmt[l] == '$')) {
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int idx = atoi(fmt);
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if (fargv == NULL) {
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warnx("incomplete use of n$");
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return (NULL);
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}
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if (idx <= myargc) {
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gargv = &myargv[idx - 1];
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} else {
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gargv = &myargv[myargc];
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}
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fmt += l + 1;
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} else if (fargv != NULL) {
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warnx("incomplete use of n$");
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return (NULL);
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}
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if (getint(&fieldwidth))
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return (NULL);
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if (gargv > maxargv)
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maxargv = gargv;
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havewidth = 1;
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*dptr++ = '*';
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*dptr = 0;
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} else {
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havewidth = 0;
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/* skip to possible '.', get following precision */
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while (isdigit(*fmt)) {
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*dptr++ = *fmt++;
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*dptr = 0;
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}
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}
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if (*fmt == '.') {
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/* precision present? */
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fmt++;
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*dptr++ = '.';
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if (*fmt == '*') {
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fmt++;
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l = strspn(fmt, digits);
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if ((l > 0) && (fmt[l] == '$')) {
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int idx = atoi(fmt);
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if (fargv == NULL) {
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warnx("incomplete use of n$");
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return (NULL);
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}
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if (idx <= myargc) {
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gargv = &myargv[idx - 1];
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} else {
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gargv = &myargv[myargc];
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}
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fmt += l + 1;
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} else if (fargv != NULL) {
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warnx("incomplete use of n$");
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return (NULL);
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}
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if (getint(&precision))
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return (NULL);
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if (gargv > maxargv)
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maxargv = gargv;
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haveprec = 1;
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*dptr++ = '*';
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*dptr = 0;
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} else {
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haveprec = 0;
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/* skip to conversion char */
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while (isdigit(*fmt)) {
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*dptr++ = *fmt++;
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*dptr = 0;
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}
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}
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} else
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haveprec = 0;
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if (!*fmt) {
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warnx("missing format character");
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return (NULL);
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}
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*dptr++ = *fmt;
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*dptr = 0;
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/*
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* Look for a length modifier. POSIX doesn't have these, so
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* we only support them for floating-point conversions, which
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* are extensions. This is useful because the L modifier can
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* be used to gain extra range and precision, while omitting
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* it is more likely to produce consistent results on different
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* architectures. This is not so important for integers
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* because overflow is the only bad thing that can happen to
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* them, but consider the command printf %a 1.1
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*/
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if (*fmt == 'L') {
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mod_ldbl = 1;
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fmt++;
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if (!strchr("aAeEfFgG", *fmt)) {
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warnx("bad modifier L for %%%c", *fmt);
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return (NULL);
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}
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} else {
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mod_ldbl = 0;
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}
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/* save the current arg offset, and set to the format arg */
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if (fargv != NULL) {
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gargv = fargv;
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}
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convch = *fmt;
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nextch = *++fmt;
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*fmt = '\0';
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switch (convch) {
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case 'b': {
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size_t len;
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char *p;
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int getout;
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p = strdup(getstr());
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if (p == NULL) {
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warnx("%s", strerror(ENOMEM));
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return (NULL);
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}
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getout = escape(p, 0, &len);
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fputs(p, stdout);
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free(p);
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if (getout)
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return (end_fmt);
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break;
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}
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case 'c': {
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char p;
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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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const char *p;
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p = getstr();
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PF(start, p);
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break;
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}
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case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
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char *f;
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intmax_t val;
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uintmax_t uval;
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int signedconv;
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signedconv = (convch == 'd' || convch == 'i');
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if ((f = mknum(start, convch)) == NULL)
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return (NULL);
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if (getnum(&val, &uval, signedconv))
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*rval = 1;
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if (signedconv)
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PF(f, val);
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else
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PF(f, uval);
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break;
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}
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case 'e': case 'E':
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case 'f': case 'F':
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case 'g': case 'G':
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case 'a': case 'A': {
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long double p;
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if (getfloating(&p, mod_ldbl))
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*rval = 1;
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if (mod_ldbl)
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PF(start, p);
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else
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PF(start, (double)p);
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break;
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}
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default:
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warnx("illegal format character %c", convch);
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return (NULL);
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}
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*fmt = nextch;
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/* return the gargv to the next element */
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return (fmt);
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}
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static char *
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mknum(char *str, char ch)
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{
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static char *copy;
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static size_t copy_size;
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char *newcopy;
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size_t len, newlen;
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len = strlen(str) + 2;
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if (len > copy_size) {
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newlen = ((len + 1023) >> 10) << 10;
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if ((newcopy = realloc(copy, newlen)) == NULL) {
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warnx("%s", strerror(ENOMEM));
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return (NULL);
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}
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copy = newcopy;
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copy_size = newlen;
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}
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memmove(copy, str, len - 3);
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copy[len - 3] = 'j';
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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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escape(char *fmt, int percent, size_t *len)
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{
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char *save, *store, c;
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int value;
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for (save = store = fmt; ((c = *fmt) != 0); ++fmt, ++store) {
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if (c != '\\') {
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*store = c;
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continue;
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}
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switch (*++fmt) {
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case '\0': /* EOS, user error */
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*store = '\\';
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*++store = '\0';
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*len = store - save;
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return (0);
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case '\\': /* backslash */
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case '\'': /* single quote */
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*store = *fmt;
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break;
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case 'a': /* bell/alert */
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*store = '\a';
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break;
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case 'b': /* backspace */
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*store = '\b';
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break;
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case 'c':
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if (!percent) {
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*store = '\0';
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*len = store - save;
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return (1);
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}
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*store = 'c';
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break;
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case 'f': /* form-feed */
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*store = '\f';
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break;
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case 'n': /* newline */
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*store = '\n';
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break;
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case 'r': /* carriage-return */
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*store = '\r';
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break;
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case 't': /* horizontal tab */
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*store = '\t';
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break;
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case 'v': /* vertical tab */
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*store = '\v';
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break;
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/* octal constant */
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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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c = (!percent && *fmt == '0') ? 4 : 3;
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for (value = 0;
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c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) {
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value <<= 3;
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value += *fmt - '0';
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}
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--fmt;
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if (percent && value == '%') {
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*store++ = '%';
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*store = '%';
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} else
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*store = (char)value;
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break;
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default:
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*store = *fmt;
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break;
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}
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}
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*store = '\0';
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*len = store - save;
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return (0);
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}
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static int
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getchr(void)
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{
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if (!*gargv)
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return ('\0');
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return ((int)**gargv++);
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}
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static const char *
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getstr(void)
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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 int
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getint(int *ip)
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{
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intmax_t val;
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uintmax_t uval;
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int rval;
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if (getnum(&val, &uval, 1))
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return (1);
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rval = 0;
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if (val < INT_MIN || val > INT_MAX) {
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warnx("%s: %s", *gargv, strerror(ERANGE));
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rval = 1;
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}
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*ip = (int)val;
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return (rval);
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}
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static int
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getnum(intmax_t *ip, uintmax_t *uip, int signedconv)
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{
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char *ep;
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int rval;
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|
|
|
if (!*gargv) {
|
|
*ip = *uip = 0;
|
|
return (0);
|
|
}
|
|
if (**gargv == '"' || **gargv == '\'') {
|
|
if (signedconv)
|
|
*ip = asciicode();
|
|
else
|
|
*uip = asciicode();
|
|
return (0);
|
|
}
|
|
rval = 0;
|
|
errno = 0;
|
|
if (signedconv)
|
|
*ip = strtoimax(*gargv, &ep, 0);
|
|
else
|
|
*uip = strtoumax(*gargv, &ep, 0);
|
|
if (ep == *gargv) {
|
|
warnx("%s: expected numeric value", *gargv);
|
|
rval = 1;
|
|
}
|
|
else if (*ep != '\0') {
|
|
warnx("%s: not completely converted", *gargv);
|
|
rval = 1;
|
|
}
|
|
if (errno == ERANGE) {
|
|
warnx("%s: %s", *gargv, strerror(ERANGE));
|
|
rval = 1;
|
|
}
|
|
++gargv;
|
|
return (rval);
|
|
}
|
|
|
|
static int
|
|
getfloating(long double *dp, int mod_ldbl)
|
|
{
|
|
char *ep;
|
|
int rval;
|
|
|
|
if (!*gargv) {
|
|
*dp = 0.0;
|
|
return (0);
|
|
}
|
|
if (**gargv == '"' || **gargv == '\'') {
|
|
*dp = asciicode();
|
|
return (0);
|
|
}
|
|
rval = 0;
|
|
errno = 0;
|
|
if (mod_ldbl)
|
|
*dp = strtold(*gargv, &ep);
|
|
else
|
|
*dp = strtod(*gargv, &ep);
|
|
if (ep == *gargv) {
|
|
warnx("%s: expected numeric value", *gargv);
|
|
rval = 1;
|
|
} else if (*ep != '\0') {
|
|
warnx("%s: not completely converted", *gargv);
|
|
rval = 1;
|
|
}
|
|
if (errno == ERANGE) {
|
|
warnx("%s: %s", *gargv, strerror(ERANGE));
|
|
rval = 1;
|
|
}
|
|
++gargv;
|
|
return (rval);
|
|
}
|
|
|
|
static int
|
|
asciicode(void)
|
|
{
|
|
int ch;
|
|
wchar_t wch;
|
|
mbstate_t mbs;
|
|
|
|
ch = (unsigned char)**gargv;
|
|
if (ch == '\'' || ch == '"') {
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
switch (mbrtowc(&wch, *gargv + 1, MB_LEN_MAX, &mbs)) {
|
|
case (size_t)-2:
|
|
case (size_t)-1:
|
|
wch = (unsigned char)gargv[0][1];
|
|
break;
|
|
case 0:
|
|
wch = 0;
|
|
break;
|
|
}
|
|
ch = wch;
|
|
}
|
|
++gargv;
|
|
return (ch);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr, "usage: printf format [arguments ...]\n");
|
|
}
|