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// trace.cpp
// Revision 7-feb-2005

#include "trace.h"


#if __BORLANDC__ >= 0x0560
#pragma warn -8091
#endif

#include <iostream>
#include <fstream>
#include <string>

#ifdef HAVE_CSTDLIB
#include <cstdlib>
#else
#include <stdlib.h>
#endif

#include <stdexcept>

#include <string.h>

using std::cerr;
using std::endl;
using std::ostream;
using std::ofstream;
using std::string;


namespace {

ostream * pout= 0;
bool flag= true;
size_t indent= 0;

TraceFunc * initial= NULL;
TraceFunc * * lastpos= & initial;

ostream * opentracefile (const char * str)
{
std::ofstream * pof=
new ofstream (str, std::ios::app | std::ios::out);
if (! pof->is_open () )
{
cerr << "Error opening " << str << endl;
delete pof;
pof= 0;
}
return pof;
}

void showinfo (const char * strenterexit, const char * strfunc)
{
if (pout)
{
* pout << string (indent, ' ') << strenterexit << ' ';

if (std::uncaught_exception () )
* pout << "(throwing) ";

* pout << strfunc << endl;
}
}

const char BAD_USE []= "Bad use of TraceFunc";

} // namespace

TraceFunc::TraceFunc (const char * strFuncName) :
strfunc (strFuncName),
next (NULL)
{
if (flag)
{
flag= false;
char * aux= getenv ("TRACEFUNC");
if (aux)
{
if (strcmp (aux, "-") == 0)
pout= & std::cerr;
else
pout= opentracefile (aux);
}
}

//tracelist.push_back (this);
previous= lastpos;
* lastpos= this;
lastpos= & next;

#if 0
if (pout)
{
* pout << string (indent, ' ') << "Enter ";

if (std::uncaught_exception () )
* pout << "(throwing) ";

* pout << strfunc << endl;
}
#else
showinfo ("Enter", strfunc);
#endif
++indent;
}

TraceFunc::~TraceFunc ()
{
--indent;

#if 0
if (pout)
{
* pout << string (indent, ' ') << "Exit ";

if (std::uncaught_exception () )
* pout << "(throwing) ";

* pout << strfunc << endl;
}
#else
showinfo ("Exit", strfunc);
#endif

if (next != NULL)
{
cerr << BAD_USE << endl;
abort ();
}
if (lastpos != & next)
{
//throw std::logic_error ("Bad use of TraceFunc");
cerr << BAD_USE << endl;
abort ();
}
lastpos= previous;
if (* lastpos != this)
{
cerr << BAD_USE << endl;
abort ();
}
* lastpos= NULL;
}

void TraceFunc::message (const std::string & strMes)
{
if (pout)
{
* pout << string (indent, ' ') << strfunc;

if (std::uncaught_exception () )
* pout << "(throwing) ";

* pout << ": " << strMes << endl;
}
}

void TraceFunc::show (int)
{
cerr << "\r\n";

if (initial == NULL)
cerr << "TraceFunc: no calls.";
else
{
cerr << "TraceFunc dump of calls: \r\n";
for (TraceFunc * act= initial; act != NULL; act= act->next)
cerr << act->strfunc << "\r\n";
cerr << "TraceFunc dump ended.";
}
cerr << "\r\n";
}

// Fin de trace.cpp
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