120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/*
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 2001 by Internet Software Consortium.
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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.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <port_before.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <isc/misc.h>
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#include <port_after.h>
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static const char hex[17] = "0123456789abcdef";
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int
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isc_gethexstring(unsigned char *buf, size_t len, int count, FILE *fp,
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int *multiline)
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{
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int c, n;
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unsigned char x;
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char *s;
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int result = count;
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x = 0; /*%< silence compiler */
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n = 0;
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while (count > 0) {
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c = fgetc(fp);
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if ((c == EOF) ||
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(c == '\n' && !*multiline) ||
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(c == '(' && *multiline) ||
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(c == ')' && !*multiline))
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goto formerr;
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/* comment */
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if (c == ';') {
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do {
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c = fgetc(fp);
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} while (c != EOF && c != '\n');
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if (c == '\n' && *multiline)
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continue;
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goto formerr;
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}
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/* white space */
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if (c == ' ' || c == '\t' || c == '\n' || c == '\r')
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continue;
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/* multiline */
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if ('(' == c || c == ')') {
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*multiline = (c == '(' /*)*/);
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continue;
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}
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if ((s = strchr(hex, tolower(c))) == NULL)
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goto formerr;
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x = (x<<4) | (s - hex);
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if (++n == 2) {
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if (len > 0U) {
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*buf++ = x;
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len--;
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} else
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result = -1;
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count--;
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n = 0;
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}
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}
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return (result);
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formerr:
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if (c == '\n')
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ungetc(c, fp);
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return (-1);
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}
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void
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isc_puthexstring(FILE *fp, const unsigned char *buf, size_t buflen,
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size_t len1, size_t len2, const char *sep)
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{
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size_t i = 0;
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if (len1 < 4U)
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len1 = 4;
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if (len2 < 4U)
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len2 = 4;
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while (buflen > 0U) {
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fputc(hex[(buf[0]>>4)&0xf], fp);
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fputc(hex[buf[0]&0xf], fp);
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i += 2;
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buflen--;
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buf++;
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if (i >= len1 && sep != NULL) {
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fputs(sep, fp);
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i = 0;
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len1 = len2;
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}
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}
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}
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void
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isc_tohex(const unsigned char *buf, size_t buflen, char *t) {
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while (buflen > 0U) {
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*t++ = hex[(buf[0]>>4)&0xf];
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*t++ = hex[buf[0]&0xf];
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buf++;
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buflen--;
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}
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*t = '\0';
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}
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/*! \file */
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