libcw/dns_sd/rpt.cpp
2024-12-01 14:35:24 -05:00

65 lines
1.4 KiB
C++

//| Copyright: (C) 2020-2024 Kevin Larke <contact AT larke DOT org>
//| License: GNU GPL version 3.0 or above. See the accompanying LICENSE file.
#include <stdio.h>
#include <stdarg.h>
#include "rpt.h"
#define RPT_BUF_N 64
char RPT_BUF[ RPT_BUF_N ];
void vrpt( printCallback_t printCbFunc, const char* fmt, va_list vl )
{
if( printCbFunc != nullptr )
{
vsnprintf(RPT_BUF,RPT_BUF_N,fmt,vl);
RPT_BUF[RPT_BUF_N-1] = '\0';
printCbFunc(RPT_BUF);
}
}
void rpt( printCallback_t printCbFunc, const char* fmt, ... )
{
va_list vl;
va_start(vl,fmt);
vrpt(printCbFunc,fmt,vl);
va_end(vl);
}
void rptHex( printCallback_t printCbFunc, const void* buf, unsigned bufByteN, const char* label, bool asciiFl )
{
const unsigned char* data = static_cast<const unsigned char*>(buf);
const unsigned colN = 8;
unsigned ci = 0;
if( label != nullptr )
rpt(printCbFunc,"%s\n",label);
for(unsigned i=0; i<bufByteN; ++i)
{
rpt(printCbFunc,"%02x ", data[i] );
++ci;
if( ci == colN || i+1 == bufByteN )
{
unsigned n = ci==colN ? colN-1 : ci-1;
for(unsigned j=0; j<(colN-n)*3; ++j)
rpt(printCbFunc," ");
if( asciiFl )
{
for(unsigned j=i-n; j<=i; ++j)
if( 32<= data[j] && data[j] < 127 )
rpt(printCbFunc,"%c",data[j]);
else
rpt(printCbFunc,".");
}
rpt(printCbFunc,"\n");
ci = 0;
}
}
}