FreeBSD-5.3/usr.bin/printf/printf.c
/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if !defined(BUILTIN) && !defined(SHELL)
#ifndef lint
static char const copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#endif
#ifndef lint
#if 0
static char const sccsid[] = "@(#)printf.c 8.1 (Berkeley) 7/20/93";
#endif
static const char rcsid[] =
"$FreeBSD: src/usr.bin/printf/printf.c,v 1.28 2004/06/05 09:32:17 das Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef SHELL
#define main printfcmd
#include "bltin/bltin.h"
#include "memalloc.h"
#else
#define warnx1(a, b, c) warnx(a)
#define warnx2(a, b, c) warnx(a, b)
#define warnx3(a, b, c) warnx(a, b, c)
#endif
#ifndef BUILTIN
#include <locale.h>
#endif
#define PF(f, func) do { \
char *b = NULL; \
if (havewidth) \
if (haveprec) \
(void)asprintf(&b, f, fieldwidth, precision, func); \
else \
(void)asprintf(&b, f, fieldwidth, func); \
else if (haveprec) \
(void)asprintf(&b, f, precision, func); \
else \
(void)asprintf(&b, f, func); \
if (b) { \
(void)fputs(b, stdout); \
free(b); \
} \
} while (0)
static int asciicode(void);
static int escape(char *, int);
static int getchr(void);
static int getdouble(double *);
static int getint(int *);
static int getquads(quad_t *, u_quad_t *, int);
static const char
*getstr(void);
static char *mkquad(char *, int);
static void usage(void);
static char **gargv;
int
#ifdef BUILTIN
progprintf(int argc, char *argv[])
#else
main(int argc, char *argv[])
#endif
{
static const char *skip1, *skip2;
int ch, chopped, end, fieldwidth, haveprec, havewidth, precision, rval;
char convch, nextch, *format, *fmt, *start;
#ifndef BUILTIN
(void) setlocale(LC_NUMERIC, "");
#endif
while ((ch = getopt(argc, argv, "")) != -1)
switch (ch) {
case '?':
default:
usage();
return (1);
}
argc -= optind;
argv += optind;
if (argc < 1) {
usage();
return (1);
}
/*
* Basic algorithm is to scan the format string for conversion
* specifications -- once one is found, find out if the field
* width or precision is a '*'; if it is, gather up value. Note,
* format strings are reused as necessary to use up the provided
* arguments, arguments of zero/null string are provided to use
* up the format string.
*/
skip1 = "#-+ 0";
skip2 = "0123456789";
chopped = escape(fmt = format = *argv, 1);/* backslash interpretation */
rval = 0;
gargv = ++argv;
for (;;) {
end = 0;
/* find next format specification */
next: for (start = fmt;; ++fmt) {
if (!*fmt) {
/* avoid infinite loop */
if (chopped) {
(void)printf("%s", start);
return (rval);
}
if (end == 1) {
warnx1("missing format character",
NULL, NULL);
return (1);
}
end = 1;
if (fmt > start)
(void)printf("%s", start);
if (!*gargv)
return (rval);
fmt = format;
goto next;
}
/* %% prints a % */
if (*fmt == '%') {
if (*++fmt != '%')
break;
(void)printf("%.*s", (int)(fmt - start), start);
fmt++;
goto next;
}
}
/* skip to field width */
for (; strchr(skip1, *fmt); ++fmt);
if (*fmt == '*') {
if (getint(&fieldwidth))
return (1);
havewidth = 1;
++fmt;
} else {
havewidth = 0;
/* skip to possible '.', get following precision */
for (; strchr(skip2, *fmt); ++fmt);
}
if (*fmt == '.') {
/* precision present? */
++fmt;
if (*fmt == '*') {
if (getint(&precision))
return (1);
haveprec = 1;
++fmt;
} else {
haveprec = 0;
/* skip to conversion char */
for (; strchr(skip2, *fmt); ++fmt);
}
} else
haveprec = 0;
if (!*fmt) {
warnx1("missing format character", NULL, NULL);
return (1);
}
convch = *fmt;
nextch = *++fmt;
*fmt = '\0';
switch(convch) {
case 'b': {
char *p;
int getout;
#ifdef SHELL
p = savestr(getstr());
#else
p = strdup(getstr());
#endif
if (p == NULL) {
warnx2("%s", strerror(ENOMEM), NULL);
return (1);
}
getout = escape(p, 0);
*(fmt - 1) = 's';
PF(start, p);
*(fmt - 1) = 'b';
#ifdef SHELL
ckfree(p);
#else
free(p);
#endif
if (getout)
return (rval);
break;
}
case 'c': {
char p;
p = getchr();
PF(start, p);
break;
}
case 's': {
const char *p;
p = getstr();
PF(start, p);
break;
}
case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
char *f;
quad_t val;
u_quad_t uval;
int signedconv;
signedconv = (convch == 'd' || convch == 'i');
if ((f = mkquad(start, convch)) == NULL)
return (1);
if (getquads(&val, &uval, signedconv))
rval = 1;
if (signedconv)
PF(f, val);
else
PF(f, uval);
break;
}
case 'e': case 'E':
case 'f': case 'F':
case 'g': case 'G':
case 'a': case 'A': {
double p;
if (getdouble(&p))
rval = 1;
PF(start, p);
break;
}
default:
warnx2("illegal format character %c", convch, NULL);
return (1);
}
*fmt = nextch;
}
/* NOTREACHED */
}
static char *
mkquad(char *str, int ch)
{
static char *copy;
static size_t copy_size;
char *newcopy;
size_t len, newlen;
len = strlen(str) + 2;
if (len > copy_size) {
newlen = ((len + 1023) >> 10) << 10;
#ifdef SHELL
if ((newcopy = ckrealloc(copy, newlen)) == NULL)
#else
if ((newcopy = realloc(copy, newlen)) == NULL)
#endif
{
warnx2("%s", strerror(ENOMEM), NULL);
return (NULL);
}
copy = newcopy;
copy_size = newlen;
}
memmove(copy, str, len - 3);
copy[len - 3] = 'q';
copy[len - 2] = ch;
copy[len - 1] = '\0';
return (copy);
}
static int
escape(char *fmt, int percent)
{
char *store;
int value, c;
for (store = fmt; (c = *fmt); ++fmt, ++store) {
if (c != '\\') {
*store = c;
continue;
}
switch (*++fmt) {
case '\0': /* EOS, user error */
*store = '\\';
*++store = '\0';
return (0);
case '\\': /* backslash */
case '\'': /* single quote */
*store = *fmt;
break;
case 'a': /* bell/alert */
*store = '\7';
break;
case 'b': /* backspace */
*store = '\b';
break;
case 'c':
*store = '\0';
return (1);
case 'f': /* form-feed */
*store = '\f';
break;
case 'n': /* newline */
*store = '\n';
break;
case 'r': /* carriage-return */
*store = '\r';
break;
case 't': /* horizontal tab */
*store = '\t';
break;
case 'v': /* vertical tab */
*store = '\13';
break;
/* octal constant */
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
for (c = *fmt == '0' ? 4 : 3, value = 0;
c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) {
value <<= 3;
value += *fmt - '0';
}
--fmt;
if (percent && value == '%') {
*store++ = '%';
*store = '%';
} else
*store = value;
break;
default:
*store = *fmt;
break;
}
}
*store = '\0';
return (0);
}
static int
getchr(void)
{
if (!*gargv)
return ('\0');
return ((int)**gargv++);
}
static const char *
getstr(void)
{
if (!*gargv)
return ("");
return (*gargv++);
}
static int
getint(int *ip)
{
quad_t val;
u_quad_t uval;
int rval;
if (getquads(&val, &uval, 1))
return (1);
rval = 0;
if (val < INT_MIN || val > INT_MAX) {
warnx3("%s: %s", *gargv, strerror(ERANGE));
rval = 1;
}
*ip = (int)val;
return (rval);
}
static int
getquads(quad_t *qp, u_quad_t *uqp, int signedconv)
{
char *ep;
int rval;
if (!*gargv) {
*qp = 0;
return (0);
}
if (**gargv == '"' || **gargv == '\'') {
if (signedconv)
*qp = asciicode();
else
*uqp = asciicode();
return (0);
}
rval = 0;
errno = 0;
if (signedconv)
*qp = strtoq(*gargv, &ep, 0);
else
*uqp = strtouq(*gargv, &ep, 0);
if (ep == *gargv) {
warnx2("%s: expected numeric value", *gargv, NULL);
rval = 1;
}
else if (*ep != '\0') {
warnx2("%s: not completely converted", *gargv, NULL);
rval = 1;
}
if (errno == ERANGE) {
warnx3("%s: %s", *gargv, strerror(ERANGE));
rval = 1;
}
++gargv;
return (rval);
}
static int
getdouble(double *dp)
{
char *ep;
int rval;
if (!*gargv)
return (0);
if (**gargv == '"' || **gargv == '\'') {
*dp = asciicode();
return (0);
}
rval = 0;
errno = 0;
*dp = strtod(*gargv, &ep);
if (ep == *gargv) {
warnx2("%s: expected numeric value", *gargv, NULL);
rval = 1;
} else if (*ep != '\0') {
warnx2("%s: not completely converted", *gargv, NULL);
rval = 1;
}
if (errno == ERANGE) {
warnx3("%s: %s", *gargv, strerror(ERANGE));
rval = 1;
}
++gargv;
return (rval);
}
static int
asciicode(void)
{
int ch;
ch = **gargv;
if (ch == '\'' || ch == '"')
ch = (*gargv)[1];
++gargv;
return (ch);
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: printf format [arg ...]\n");
}