mirror of
https://github.com/obgm/libcoap.git
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Olaf Bergmann
758b7f775e
* 0001-Trailing-whitespace-cleanup.patch * 0001-Went-back-to-2.65-of-autoconf.patch * 0002-Fix-compiler-warning-for-str.patch * added several files to Makefile target .gitignore
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* encode.c -- encoding and decoding of CoAP data types
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*
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* Copyright (C) 2010 Olaf Bergmann <bergmann@tzi.org>, Carsten Bormann
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef NDEBUG
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# include <stdio.h>
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#endif
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#include "encode.h"
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/* Carsten suggested this when fls() is not available: */
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int coap_fls(unsigned int i) {
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int n;
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for (n = 0; i; n++)
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i >>= 1;
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return n;
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}
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unsigned int
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coap_decode_var_bytes(unsigned char *buf,unsigned int len) {
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unsigned int i, n = 0;
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for (i = 0; i < len; ++i)
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n = (n << 8) + buf[i];
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return n;
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}
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unsigned int
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coap_encode_var_bytes(unsigned char *buf, unsigned int val) {
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int n, i = val >> 1;
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for (n = 0; i; n++) /* FIXME: coap_fls() */
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i >>= 1;
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for (i = n / 8 + 1; i; --i) {
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buf[i-1] = val & 0xff;
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val >>= 8;
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}
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return n / 8 + 1;
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}
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