106 lines
2.1 KiB
C++
106 lines
2.1 KiB
C++
/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* pvAccessCPP is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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#include <pv/hexDump.h>
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#include <iostream>
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#include <sstream>
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using namespace epics::pvData;
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using std::stringstream;
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using std::endl;
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using std::cout;
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namespace epics {
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namespace pvAccess {
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/// Byte to hexchar mapping.
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static const char lookup[] = {
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
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/// Get hex representation of byte.
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String toHex(int8 b) {
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String sb;
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int upper = (b>>4)&0x0F;
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sb += lookup[upper];
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int lower = b&0x0F;
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sb += lookup[lower];
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sb += ' ';
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return sb;
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}
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/// Get ASCII representation of byte, dot if non-readable.
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char toAscii(int8 b) {
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if(b>(int8)31&&b<(int8)127)
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return (char)b;
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else
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return '.';
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}
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void hexDump(const String name, const int8 *bs, int len) {
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hexDump(name, bs, 0, len);
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}
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void hexDump(const String name, const int8 *bs, int start, int len) {
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hexDump("", name, bs, start, len);
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}
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void hexDump(const String prologue, const String name, const int8 *bs,
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int start, int len) {
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stringstream header;
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header<<prologue<<endl<<"Hexdump ["<<name<<"] size = "<<len;
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String out(header.str());
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String chars;
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for(int i = start; i<(start+len); i++) {
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if(((i-start)%16)==0) {
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out += chars;
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out += '\n';
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chars.clear();
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}
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chars += toAscii(bs[i]);
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out += toHex(bs[i]);
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if(((i-start)%4)==3) {
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chars += ' ';
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out += ' ';
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}
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}
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if(len%16!=0) {
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int pad = 0;
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int delta_bytes = 16-(len%16);
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//rest of line (no of bytes)
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//each byte takes two chars plus one ws
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pad = delta_bytes*3;
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//additional whitespaces after four bytes
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pad += (delta_bytes/4);
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pad++;
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for(int i = 0; i<pad; i++)
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chars.insert(0, " ");
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}
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out += chars;
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cout<<out<<endl;
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}
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}
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}
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