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