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MemDump.cpp
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// -*- c++ -*-
//------------------------------------------------------------------------------
// MemDump.cpp
//------------------------------------------------------------------------------
// Copyright (C) 1997-2002 Vladislav Grinchenko
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// $Source: /cvsroot/libassa/libassa/assa/MemDump.cpp,v $
// $Revision: 1.6 $
// $Locker: $
// $Author: vlg $
// $Date: 2006/07/20 02:30:54 $
//------------------------------------------------------------------------------
#include "assa/Logger.h"
#include "assa/MemDump.h"
using namespace ASSA;
const char MemDump::m_empty_str[] = "Null";
MemDump::
MemDump(const char* msg_, int len_) : m_dump (NULL)
{
register int i; // ptr into source buffer
register int j; // pair elements counter
register int k; // pairs counter [0;16[
const char *p; // ptr into source buffer
char *hex; // hex ptr into destination buffer
char *ascii; // ascii ptr into destination buffer
long final_len;
/*--- Precondition --- */
if (len_ <= 0 || msg_ == (char*) NULL) {
DL((ASSAERR,"No data to process.\n"));
DL((ASSAERR,"Data length requested: %d <= 0!\n", len_));
return;
}
j = k = 1;
/*---
Each row holds 16 bytes of data. It requres 74 characters maximum.
Here's some examples:
0 1 2 3 4 5 6 7
0123456789012345678901234567890123456789012345678901234567890123456789012
-------------------------------------------------------------------------
3132 3037 3039 3039 3031 3130 3839 3033 1207090901108903
3038 3132 3030 3331 3030 0d0a 3839 3033 0812003100\r\n8903
0d0a 0d0a 0d0a 0d0a 0d0a 0d0a 0d0a 0d0a \r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
If all 16 bytes are control characters, the ASCII representation
will extend line to 72 characters plus cartrige return and line
feed at the end of the line.
If len_ is not multiple of 16, we add one more row and another row
just to be on a safe side.
---*/
final_len = (int (len_/16) + 1 + (len_ % 16 ? 1:0)) * 74;
m_dump = new char[final_len];
memset (m_dump, ' ', final_len);
p = msg_; // ptr to original image
hex = m_dump; // current ptr to hex image
ascii = m_dump + 41; // current ptr to ascii image
for (i = 0; i < len_; i++)
{
sprintf(hex,"%01x%01x", p[i] >> 4 & 0x0f, p[i] & 0x0f);
hex+=2;
if (p[i] == '\n') { sprintf(ascii,"\\n"); ascii+=2; }
else if (p[i] == '\t') { sprintf(ascii,"\\t"); ascii+=2; }
else if (p[i] == '\v') { sprintf(ascii,"\\v"); ascii+=2; }
else if (p[i] == '\b') { sprintf(ascii,"\\b"); ascii+=2; }
else if (p[i] == '\r') { sprintf(ascii,"\\r"); ascii+=2; }
else if (p[i] == '\f') { sprintf(ascii,"\\f"); ascii+=2; }
else if (p[i] == '\a') { sprintf(ascii,"\\a"); ascii+=2; }
else if (p[i] == '\0') { sprintf(ascii,"\\0"); ascii+=2; }
else {
sprintf (ascii++,"%c", ((p[i] < ' ' || p [i] > '~') ? '.' : p [i]));
}
if (!(j++ % 2)) {
sprintf (hex++," ");
}
k %= 16;
if (!(k++)) {
*hex = ' ';
sprintf (ascii++,"\n");
hex = ascii;
ascii += 41;
}
}
*hex = ' ';
m_dump [final_len-1] = '\0';
}
void
MemDump::
dump_to_log (unsigned long mask_, const char* info_, const char* msg_, int len_)
{
/* A very important shortcut (performance-wise)
* It saves on constructing unnecessary MemDump object when
* message logging for that particular group is disabled.
*/
if (LOGGER->group_enabled (static_cast<Group> (mask_)) && len_ > 0)
{
MemDump temp (msg_, len_);
DL((mask_, "(%d bytes) %s\n", len_, info_));
DL((mask_, "\n\n%s\n\n", temp.getMemDump ()));
}
}
Logger.h
An abstraction to message logging facility.
DL
#define DL(X)
A macro for writing debug message to the Logger.
Definition Logger.h:273
LOGGER
#define LOGGER
A shortcut to locate a singleton object of class Logger.
Definition Logger.h:136
MemDump.h
A Hex/Ascii memory dump of similar to od(1) UNIX utility.
ASSA::AutoPtrRef
A wrapper class to provide AutoPtr with reference semantics.
Definition AutoPtr.h:32
ASSA::MemDump
Definition MemDump.h:41
ASSA::MemDump::m_empty_str
static const char m_empty_str[]
static Null string
Definition MemDump.h:47
ASSA::MemDump::MemDump
MemDump(const char *msg_, int len_)
Constructor converts original binary image to hex and ascii representation, and stores resultant imag...
Definition MemDump.cpp:27
ASSA::MemDump::m_dump
char * m_dump
pointer to converted image
Definition MemDump.h:44
ASSA::MemDump::dump_to_log
static void dump_to_log(unsigned long mask_, const char *info_, const char *msg_, int len_)
Write hex/ascii dump of a memory region to log file.
Definition MemDump.cpp:111
ASSA
Definition Acceptor.h:40
ASSA::Group
Group
Definition LogMask.h:25
ASSA::ASSAERR
@ ASSAERR
ASSA and system errors
Definition LogMask.h:34