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This file is part of libcapwap.
libcapwap is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
libcapwap is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Foobar. If not, see <>.
* @file
* @brief Implementation of various format functions.
#include <stdint.h>
#include <stdio.h>
#include "cw.h"
* Format bytes as hex string.
* @param dst Destination buffer
* @param format Format to use, when writing a byte. Use the same format syntax as for printf,
* e.g. the string "%02X" would format a byte as upper case hexadeciaml string.
* @param delim Delimiter string. The given string is placed between bytes.
* @param src Bytes to format
* @param len Number of bytes to format
* @return the number of characters written to dst
* This function is used by macros like #cw_format_hexl, #cw_format_hex ... \n
* The size of the destination buffer must be at least x * len + strlen(delim) * (len-1) +1,
* where x is the number of characters. A formatted hex byte needs (typically 2).
int format_hex_bytes(char *dst, const char *format, const char *delim,
const uint8_t * src, int len)
char *d = dst;
int i;
const char *cdelim = NULL;
for (i = 0; i < len; i++) {
if (cdelim)
d += sprintf(d, "%s", cdelim);
cdelim = delim;
d += sprintf(d, format, src[i]);
return d - dst;
char *format_s_hex_bytes(char *dst, const char *format, const char *delim,
const uint8_t * src, int len)
format_hex_bytes(dst, format, delim, src, len);
return dst;
int format_hdr_flags(char *dst, uint8_t * th)
char *s = dst;
s += sprintf(s, "%s", "(");
s += sprintf(s, "%s", cw_get_hdr_flag_t(th) ? "T" : "");
s += sprintf(s, "%s", cw_get_hdr_flag_f(th) ? "F" : "");
s += sprintf(s, "%s", cw_get_hdr_flag_l(th) ? "L" : "");
s += sprintf(s, "%s", cw_get_hdr_flag_w(th) ? "W" : "");
s += sprintf(s, "%s", cw_get_hdr_flag_m(th) ? "M" : "");
s += sprintf(s, "%s", cw_get_hdr_flag_k(th) ? "K" : "");
s += sprintf(s, "%s", ")");
return s - dst;