mfile.cpp

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// $common\mfile.cpp 1.5 milbo$ some file handling routines
// Warning: this is raw research code -- expect it to be quite messy.
// milbo durban dec05

#include <windows.h>
#include <io.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <float.h>
#include <math.h>
#include <new.h>
#include <direct.h>
#include <sys/stat.h>
#include <fstream.h>
#include <iostream.h>
#include "mcommon.hpp"
#include "util.hpp"

static char sgPrintBuf[CONF_nMaxPrintfLen];

//-----------------------------------------------------------------------------
// Like fopen but prints a message and exits if open fails

FILE *Fopen (const char *sPath, const char *sMode)
{
FILE *pFile = fopen(sPath, sMode);
if (!pFile)
	{
	char *s;
	switch (sMode[0])
		{
		case 'w':
			s = " for writing";
			break;
		case 'a':
			s = " for appending";
			break;
		case 'r':
			s = "";
			break;
		default:
			s = " (unknown mode)";
			break;
		}
	Err("Can't open %s%s", sPath, s);
	}
return pFile;
}

//-----------------------------------------------------------------------------
// Like fwrite but prints a message and exits if write fails

void Fwrite (const void *buf, size_t Size, size_t Count, FILE *pFile, char *sPath)
{
if (fwrite(buf, Size, Count, pFile) != Count)
	Err("Can't write %s", sPath);	// will exit the program
}

//-----------------------------------------------------------------------------
// Like fprintf but prints a message and exits if fprintf fails

void __cdecl Fprintf (FILE *pFile, const char *pArgs, ...)
{
va_list		pArg;
va_start(pArg, pArgs);
vsprintf(sgPrintBuf, pArgs, pArg);
va_end(pArg);
int Len = strlen(sgPrintBuf);
DASSERT(Len < CONF_nMaxPrintfLen);
if (Len != fprintf(pFile, "%s", sgPrintBuf))
	Err("Can't write to file: %s", sgPrintBuf);
}

//-----------------------------------------------------------------------------
// Like Fprintf but has a filename parameter for better error reporting

void __cdecl Fprintf (const char *sFile, FILE *pFile, const char *pArgs, ...)
{
va_list		pArg;
va_start(pArg, pArgs);
vsprintf(sgPrintBuf, pArgs, pArg);
va_end(pArg);
int Len = strlen(sgPrintBuf);
DASSERT(Len < CONF_nMaxPrintfLen-1);
if (Len != fprintf(pFile, "%s", sgPrintBuf))
	Err("Can't write to %s: %s", sFile, sgPrintBuf);
}

//-----------------------------------------------------------------------------
// Like fread but prints a message and exits if read fails

void Fread (void *buf, size_t Size, size_t Count, FILE *pFile, const char *sPath)
{
if (fread(buf, Size, Count, pFile) != Count)
	Err("Can't read %s", sPath);	// will exit the program
}

//-----------------------------------------------------------------------------
// Like gets but skips comments ie white space lines and lines beginning with #

char *Fgets (char *s, int n, FILE *stream)
{
char *p;
bool fComment;
do
	{
	p = fgets(s, n, stream);
	fComment = (p != NULL) && (s[0] == '#' || strspn(s, " \t\n") == strlen(s));
	}
while (fComment);
return p;
}