62f30e8257
* Escape characters in the string needed to be processed as they were encountered, otherwise a "\000" octal constant would prematurely terminate the formatting string. * Implemented the %b, SysV echo(1) compatibility, formatting directive.
439 lines
8.4 KiB
C
439 lines
8.4 KiB
C
/*
|
|
* Copyright (c) 1989 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
char copyright[] =
|
|
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
/*static char sccsid[] = "from: @(#)printf.c 5.9 (Berkeley) 6/1/90";*/
|
|
static char rcsid[] = "$Id: printf.c,v 1.4 1993/11/05 20:12:40 jtc Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include <ctype.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <limits.h>
|
|
#include <locale.h>
|
|
#include <err.h>
|
|
|
|
void do_printf();
|
|
void print_escape_str();
|
|
int print_escape();
|
|
|
|
int getchr();
|
|
int getint();
|
|
long getlong();
|
|
double getdouble();
|
|
char *getstr();
|
|
|
|
int rval;
|
|
char **gargv;
|
|
|
|
#define isodigit(c) ((c) >= '0' && (c) <= '7')
|
|
#define octtobin(c) ((c) - '0')
|
|
#define hextobin(c) ((c) >= 'A' && 'c' <= 'F' ? c - 'A' + 10 : (c) >= 'a' && (c) <= 'f' ? c - 'a' + 10 : c - '0')
|
|
|
|
#define PF(f, func) { \
|
|
if (fieldwidth) \
|
|
if (precision) \
|
|
(void)printf(f, fieldwidth, precision, func); \
|
|
else \
|
|
(void)printf(f, fieldwidth, func); \
|
|
else if (precision) \
|
|
(void)printf(f, precision, func); \
|
|
else \
|
|
(void)printf(f, func); \
|
|
}
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
char *format;
|
|
|
|
setlocale (LC_ALL, "");
|
|
|
|
if (argc < 2) {
|
|
fprintf(stderr, "usage: printf format [arg ...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
format = argv[1];
|
|
gargv = argv + 2;
|
|
|
|
do {
|
|
do_printf(format);
|
|
} while (*gargv);
|
|
|
|
exit (rval);
|
|
}
|
|
|
|
void
|
|
do_printf(format)
|
|
char *format;
|
|
{
|
|
static char *skip1, *skip2;
|
|
register char *fmt, *start;
|
|
register int fieldwidth, precision;
|
|
char convch, nextch, *mklong();
|
|
|
|
/*
|
|
* 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";
|
|
|
|
/* find next format specification */
|
|
for (fmt = format; *fmt; fmt++) {
|
|
switch (*fmt) {
|
|
case '%':
|
|
start = fmt++;
|
|
|
|
if (*fmt == '%') {
|
|
putchar ('%');
|
|
break;
|
|
} else if (*fmt == 'b') {
|
|
char *p = getstr();
|
|
print_escape_str(p);
|
|
break;
|
|
}
|
|
|
|
/* skip to field width */
|
|
for (; index(skip1, *fmt); ++fmt);
|
|
fieldwidth = *fmt == '*' ? getint() : 0;
|
|
|
|
/* skip to possible '.', get following precision */
|
|
for (; index(skip2, *fmt); ++fmt);
|
|
if (*fmt == '.')
|
|
++fmt;
|
|
precision = *fmt == '*' ? getint() : 0;
|
|
|
|
for (; index(skip2, *fmt); ++fmt);
|
|
if (!*fmt) {
|
|
warnx ("missing format character");
|
|
rval = 1;
|
|
return;
|
|
}
|
|
|
|
convch = *fmt;
|
|
nextch = *(fmt + 1);
|
|
*(fmt + 1) = '\0';
|
|
switch(convch) {
|
|
case 'c': {
|
|
char p = getchr();
|
|
PF(start, p);
|
|
break;
|
|
}
|
|
case 's': {
|
|
char *p = getstr();
|
|
PF(start, p);
|
|
break;
|
|
}
|
|
case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': {
|
|
char *f = mklong(start, convch);
|
|
long p = getlong();
|
|
PF(f, p);
|
|
free(f);
|
|
break;
|
|
}
|
|
case 'e': case 'E': case 'f': case 'g': case 'G': {
|
|
double p = getdouble();
|
|
PF(start, p);
|
|
break;
|
|
}
|
|
default:
|
|
warnx ("%s: invalid directive", start);
|
|
rval = 1;
|
|
}
|
|
*(fmt + 1) = nextch;
|
|
break;
|
|
|
|
case '\\':
|
|
fmt += print_escape(fmt);
|
|
break;
|
|
|
|
default:
|
|
putchar (*fmt);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Print SysV echo(1) style escape string
|
|
*/
|
|
void
|
|
print_escape_str(str)
|
|
register char *str;
|
|
{
|
|
int value;
|
|
int c;
|
|
|
|
while (*str) {
|
|
if (*str == '\\') {
|
|
str++;
|
|
/*
|
|
* %b string octal constants are not like those in C.
|
|
* They start with a \0, and are followed by 0, 1, 2,
|
|
* or 3 octal digits.
|
|
*/
|
|
if (*str == '0') {
|
|
str++;
|
|
for (c = 3, value = 0; c-- && isodigit(*str); str++) {
|
|
value <<= 3;
|
|
value += octtobin(*str);
|
|
}
|
|
putchar (value);
|
|
str--;
|
|
} else if (*str == 'c') {
|
|
exit (rval);
|
|
} else {
|
|
str--;
|
|
str += print_escape(str);
|
|
}
|
|
} else {
|
|
putchar (*str);
|
|
}
|
|
str++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Print "standard" escape characters
|
|
*/
|
|
int
|
|
print_escape(str)
|
|
register char *str;
|
|
{
|
|
char *start = str;
|
|
int c;
|
|
int value;
|
|
|
|
str++;
|
|
|
|
switch (*str) {
|
|
case '0': case '1': case '2': case '3':
|
|
case '4': case '5': case '6': case '7':
|
|
for (c = 3, value = 0; c-- && isodigit(*str); str++) {
|
|
value <<= 3;
|
|
value += octtobin(*str);
|
|
}
|
|
putchar(value);
|
|
return str - start - 1;
|
|
/* NOTREACHED */
|
|
|
|
case 'x':
|
|
str++;
|
|
for (value = 0; isxdigit(*str); str++) {
|
|
value <<= 4;
|
|
value += hextobin(*str);
|
|
}
|
|
if (value > UCHAR_MAX) {
|
|
warnx ("escape sequence out of range for character");
|
|
rval = 1;
|
|
}
|
|
putchar (value);
|
|
return str - start - 1;
|
|
/* NOTREACHED */
|
|
|
|
case '\\': /* backslash */
|
|
putchar('\\');
|
|
break;
|
|
|
|
case '\'': /* single quote */
|
|
putchar('\'');
|
|
break;
|
|
|
|
case '"': /* double quote */
|
|
putchar('"');
|
|
break;
|
|
|
|
case 'a': /* alert */
|
|
#ifdef __STDC__
|
|
putchar('\a');
|
|
#else
|
|
putchar(007);
|
|
#endif
|
|
break;
|
|
|
|
case 'b': /* backspace */
|
|
putchar('\b');
|
|
break;
|
|
|
|
case 'e': /* escape */
|
|
#ifdef __GNUC__
|
|
putchar('\e');
|
|
#else
|
|
putchar(033);
|
|
#endif
|
|
break;
|
|
|
|
case 'f': /* form-feed */
|
|
putchar('\f');
|
|
break;
|
|
|
|
case 'n': /* newline */
|
|
putchar('\n');
|
|
break;
|
|
|
|
case 'r': /* carriage-return */
|
|
putchar('\r');
|
|
break;
|
|
|
|
case 't': /* tab */
|
|
putchar('\t');
|
|
break;
|
|
|
|
case 'v': /* vertical-tab */
|
|
putchar('\v');
|
|
break;
|
|
|
|
default:
|
|
putchar(*str);
|
|
warnx("unknown escape sequence `\\%c'", *str);
|
|
rval = 1;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
char *
|
|
mklong(str, ch)
|
|
char *str, ch;
|
|
{
|
|
int len;
|
|
char *copy;
|
|
|
|
len = strlen(str) + 2;
|
|
if (!(copy = malloc((unsigned int)len))) {
|
|
err(1, NULL);
|
|
/* NOTREACHED */
|
|
}
|
|
bcopy(str, copy, len - 3);
|
|
copy[len - 3] = 'l';
|
|
copy[len - 2] = ch;
|
|
copy[len - 1] = '\0';
|
|
return(copy);
|
|
}
|
|
|
|
int
|
|
getchr()
|
|
{
|
|
if (!*gargv)
|
|
return((int)'\0');
|
|
return((int)**gargv++);
|
|
}
|
|
|
|
char *
|
|
getstr()
|
|
{
|
|
if (!*gargv)
|
|
return("");
|
|
return(*gargv++);
|
|
}
|
|
|
|
static char *number = "+-.0123456789";
|
|
int
|
|
getint()
|
|
{
|
|
if (!*gargv)
|
|
return(0);
|
|
|
|
if (index(number, **gargv))
|
|
return(atoi(*gargv++));
|
|
|
|
return 0;
|
|
}
|
|
|
|
long
|
|
getlong()
|
|
{
|
|
long val;
|
|
char *ep;
|
|
|
|
if (!*gargv)
|
|
return(0L);
|
|
|
|
if (**gargv == '\"' || **gargv == '\'') {
|
|
val = gargv[0][1];
|
|
gargv++;
|
|
return val;
|
|
}
|
|
|
|
val = strtol (*gargv, &ep, 0);
|
|
if (*ep) {
|
|
warnx ("incompletely converted argument: %s", *gargv);
|
|
rval = 1;
|
|
}
|
|
|
|
gargv++;
|
|
return val;
|
|
}
|
|
|
|
double
|
|
getdouble()
|
|
{
|
|
double val;
|
|
char *ep;
|
|
|
|
if (!*gargv)
|
|
return(0.0);
|
|
|
|
if (**gargv == '\"' || **gargv == '\'') {
|
|
val = gargv[0][1];
|
|
gargv++;
|
|
return val;
|
|
}
|
|
|
|
val = strtod (*gargv, &ep);
|
|
if (*ep) {
|
|
warnx ("incompletely converted argument: %s", *gargv);
|
|
rval = 1;
|
|
}
|
|
|
|
gargv++;
|
|
return val;
|
|
}
|