/* $NetBSD: subr.c,v 1.1.1.2 2012/09/09 16:08:11 christos Exp $ */
/*
* Copyright (C) 2009 Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Portions Copyright (c) 1993 by Digital Equipment Corporation.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies, and that
* the name of Digital Equipment Corporation not be used in advertising or
* publicity pertaining to distribution of the document or software without
* specific, written prior permission.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#ifndef lint
static const char sccsid[] = "@(#)subr.c 5.24 (Berkeley) 3/2/91";
static const char rcsid[] = "Id: subr.c,v 1.3 2009/03/03 23:49:07 tbox Exp ";
#endif /* not lint */
/*
*******************************************************************************
*
* subr.c --
*
* Miscellaneous subroutines for the name server
* lookup program.
*
* Copyright (c) 1985
* Andrew Cherenson
* U.C. Berkeley
* CS298-26 Fall 1985
*
*******************************************************************************
*/
#include "port_before.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <netdb.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "port_after.h"
#include "resolv.h"
#include "res.h"
/*
*******************************************************************************
*
* StringToClass --
*
* Converts a string form of a query class name to its
* corresponding integer value.
*
*******************************************************************************
*/
int
StringToClass(class, dflt, errorfile)
char *class;
int dflt;
FILE *errorfile;
{
int result, success;
result = sym_ston(__p_class_syms, class, &success);
if (success)
return result;
if (errorfile)
fprintf(errorfile, "unknown query class: %s\n", class);
return(dflt);
}
/*
*******************************************************************************
*
* StringToType --
*
* Converts a string form of a query type name to its
* corresponding integer value.
*
*******************************************************************************
*/
int
StringToType(type, dflt, errorfile)
char *type;
int dflt;
FILE *errorfile;
{
int result, success;
result = sym_ston(__p_type_syms, type, &success);
if (success)
return (result);
if (errorfile)
fprintf(errorfile, "unknown query type: %s\n", type);
return (dflt);
}
/*
* Skip over leading white space in SRC and then copy the next sequence of
* non-whitespace characters into DEST. No more than (DEST_SIZE - 1)
* characters are copied. DEST is always null-terminated. Returns 0 if no
* characters could be copied into DEST. Returns the number of characters
* in SRC that were processed (i.e. the count of characters in the leading
* white space and the first non-whitespace sequence).
*
* int i;
* char *p = " foo bar ", *q;
* char buf[100];
*
* q = p + pickString(p, buf, sizeof buff);
* assert (strcmp (q, " bar ") == 0) ;
*
*/
int
pickString(const char *src, char *dest, size_t dest_size) {
const char *start;
const char *end ;
size_t sublen ;
if (dest_size == 0 || dest == NULL || src == NULL)
return 0;
for (start = src ; isspace((unsigned char)*start) ; start++)
/* nada */ ;
for (end = start ; *end != '\0' && !isspace((unsigned char)*end) ; end++)
/* nada */ ;
sublen = end - start ;
if (sublen == 0 || sublen > (dest_size - 1))
return 0;
strncpy (dest, start, sublen);
dest[sublen] = '\0' ;
return (end - src);
}
/*
* match the string FORMAT against the string SRC. Leading whitespace in
* FORMAT will match any amount of (including no) leading whitespace in
* SRC. Any amount of whitespace inside FORMAT matches any non-zero amount
* of whitespace in SRC. Value returned is 0 if match didn't occur, or the
* amount of characters in SRC that did match
*
* int i ;
*
* i = matchString(" a b c", "a b c") ;
* assert (i == 5) ;
* i = matchString("a b c", " a b c");
* assert (i == 0) ; becasue no leading white space in format
* i = matchString(" a b c", " a b c");
* assert(i == 12);
* i = matchString("aa bb ", "aa bb ddd sd");
* assert(i == 16);
*/
int
matchString (const char *format, const char *src) {
const char *f = format;
const char *s = src;
if (f == NULL || s == NULL)
goto notfound;
if (isspace((unsigned char)*f)) {
while (isspace((unsigned char)*f))
f++ ;
while (isspace((unsigned char)*s))
s++ ;
}
while (1) {
if (isspace((unsigned char)*f)) {
if (!isspace((unsigned char)*s))
goto notfound;
while(isspace((unsigned char)*s))
s++;
/* any amount of whitespace in the format string
will match any amount of space in the source
string. */
while (isspace((unsigned char)*f))
f++;
} else if (*f == '\0') {
return (s - src);
} else if (*f != *s) {
goto notfound;
} else {
s++ ;
f++ ;
}
}
notfound:
return 0 ;
}