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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#include <stdio.h>
#include <ctype.h>
#include <stdarg.h>
#include <errno.h>
#include <string.h>
#include <malloc.h>
#define ON 1
#define OFF 0
#define ARGMAX 64
static unsigned char newap[ARGMAX * sizeof(double)];
static unsigned char newform[256];
extern int _doscan();
static int format_arg(unsigned char *, unsigned char *, unsigned char *);
int
scanf(char *fmt, ...)
{
va_list ap;
char *nf;
int ret_val;
va_start(ap, fmt);
if (strlen(fmt) >= sizeof(newform)) {
nf = malloc(strlen(fmt)+1);
if (format_arg((unsigned char *)strcpy(nf, fmt), ap, newap)
== ON) {
va_end(ap);
ret_val = _doscan(stdin, nf, newap);
free(nf);
return(ret_val);
}
free(nf);
} else if (format_arg((unsigned char *)strcpy(newform, fmt), ap, newap)
== ON) {
va_end(ap);
return(_doscan(stdin, newform, newap));
}
ret_val = _doscan(stdin, fmt, ap);
va_end(ap);
return (ret_val);
}
int
fscanf(FILE *iop, char *fmt, ...)
{
va_list ap;
char *nf;
int ret_val;
#ifdef POSIX
if ( !(iop->_flag & (_IOREAD|_IORW)) ) {
iop->_flag |= _IOERR;
errno = EBADF;
return (EOF);
}
#endif /* POSIX */
va_start(ap, fmt);
if (strlen(fmt) >= sizeof(newform)) {
nf = malloc(strlen(fmt)+1);
if (format_arg((unsigned char *)strcpy(nf, fmt), ap, newap)
== ON) {
va_end(ap);
ret_val = _doscan(stdin, nf, newap);
free(nf);
return(ret_val);
}
free(nf);
} else if (format_arg((unsigned char *)strcpy(newform, fmt), ap, newap)
== ON) {
va_end(ap);
return(_doscan(iop, newform, newap));
}
ret_val = _doscan(iop, fmt, ap);
va_end(ap);
return (ret_val);
}
int
sscanf(char *str, char *fmt, ...)
{
va_list ap;
FILE strbuf;
char *nf;
int ret_val;
va_start(ap, fmt);
strbuf._flag = _IOREAD|_IOSTRG;
strbuf._ptr = strbuf._base = (unsigned char*)str;
strbuf._cnt = strlen(str);
strbuf._bufsiz = strbuf._cnt;
if (strlen(fmt) >= sizeof(newform)) {
nf = malloc(strlen(fmt)+1);
if (format_arg((unsigned char *)strcpy(nf, fmt), ap, newap)
== ON) {
va_end(ap);
ret_val = _doscan(stdin, nf, newap);
free(nf);
return(ret_val);
}
free(nf);
} else if (format_arg((unsigned char *)strcpy(newform, fmt), ap, newap)
== ON) {
va_end(ap);
return(_doscan(&strbuf, newform, newap));
}
ret_val = _doscan(&strbuf, fmt, ap);
va_end(ap);
return (ret_val);
}
/*
* This function reorganises the format string and argument list.
*/
#ifndef NL_ARGMAX
#define NL_ARGMAX 9
#endif
struct al {
int a_num; /* arg # specified at this position */
unsigned char *a_start; /* ptr to 'n' part of '%n$' in format str */
unsigned char *a_end; /* ptr to '$'+1 part of '%n$' in format str */
int *a_val; /* pointers to arguments */
};
static int
format_arg(unsigned char *format, unsigned char *list, unsigned char *newlist)
{
unsigned char *aptr, *bptr, *cptr;
int i, fcode, nl_fmt, num, length, j;
unsigned char *fmtsav;
struct al args[ARGMAX + 1];
#ifdef VTEST
{
int fd;
fd = creat("/tmp/SCANF", 0666);
}
#endif
for (i = 0; i <= ARGMAX; args[i++].a_num = 0);
nl_fmt = 0;
i = j = 1;
while (*format) {
while ((fcode = *format++) != '\0' && fcode != '%') ;
if (!fcode || i > ARGMAX)
break;
charswitch:
switch (fcode = *format++) {
case 'l':
case 'h':
goto charswitch;
case '0': case '1': case '2':
case '3': case '4': case '5':
case '6': case '7': case '8':
case '9':
num = fcode - '0';
fmtsav = format;
while (isdigit(fcode = *format)) {
num = num * 10 + fcode - '0';
format++;
}
if (*format == '$') {
nl_fmt++;
args[i].a_start = fmtsav - 1;
args[i].a_end = ++format;
if (num > NL_ARGMAX)
num = num;
args[i].a_num = num;
}
goto charswitch;
/* now have arg type only to parse */
case 'd': case 'u': case 'o':
case 'x': case 'e': case 'f':
case 'g': case 'c': case '[':
case 's':
if (nl_fmt == 0)
return(OFF);
if (!args[i].a_num) {
args[i].a_start = args[i].a_end = format - 1;
args[i].a_num = j++;
}
i++;
break;
case '*':
case '%':
break;
default:
format--;
break;
}
}
length = i;
if (nl_fmt == 0)
return (OFF);
for (i = 1; i < length && args[i].a_num == 0; i++);
/*
* Reformat the format string
*/
cptr = aptr = args[i].a_start;
do {
bptr = args[i++].a_end;
for (; i < length && args[i].a_num == 0; i++);
if (i == length)
while (*cptr++);
else
cptr = args[i].a_start;
for (; bptr != cptr; *aptr++ = *bptr++);
} while (i < length);
/*
* Create arglist
* assuming that pointer to all variable type have
* same size.
*/
for (i = 1; i < length; i++)
args[i].a_val = ((int **)(list += sizeof(int *)))[-1];
for (i = 1; i < length; i++) {
int **ptr;
ptr = (int **)newlist;
*ptr = args[args[i].a_num].a_val;
newlist += sizeof(int *);
}
return(ON);
}
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