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logfile.c
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logfile.c
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/***********************************************************************
Filename: logfile.c
antiquity Ted Hale created
************************************************************************/
/* system includes */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <time.h>
#include <string.h>
// needed for the debug flag
#include "hottub.h"
/* global data*/
FILE *logfp;
unsigned long LineNum;
int Julian;
char FileName[100];
/* ------------------------- Log file functions -------------------------- */
/*
CloseLogFile
Closes the current log file if it is in use.
*/
void LogClose(void)
{
fclose(logfp);
logfp = NULL;
}
/*
OpenLogFile
Opens the logfile with the specified name and julian day
Level = level of messages -
0 = errors only, 1 status messages also, 2 = detailed log
RETURNS: 1 if an error occurred creating the file
0 for success
filename should include full path but not suffix
*/
int LogOpen(char *filename)
{
char temp[200];
struct tm *today;
time_t now;
if (filename == NULL) {
return (1);
}
time(&now);
today = localtime(&now);
// save params globally for later
strncpy(FileName, filename, strlen(filename));
// save this in static variable so we knw when day changes
Julian = today->tm_yday+1;
// put together the file name
sprintf(temp,"%s_%04d-%02d-%02d.log",filename,
today->tm_year+1900,today->tm_mon+1,today->tm_mday);
logfp = fopen (temp, "a" );
if ( logfp == NULL ) {
return (1);
}
LineNum = 0;
return (0);
}
/*
Log
Writes a message to the previously opened log file.
Passed in a format string and variable number of parameters,
in the format used by printf.
*/
void Log(char *format, ... )
{
char dtbuf[30];
va_list arglist;
struct tm *today;
time_t now;
time(&now);
today = localtime(&now);
if( Julian != today->tm_yday+1 ) {
LogClose();
LogOpen( FileName );
}
if (logfp==NULL) return;
sprintf(dtbuf,"%02d/%02d/%04d %02d:%02d:%02d",today->tm_mon+1,today->tm_mday,
today->tm_year+1900,today->tm_hour,today->tm_min,today->tm_sec);
fprintf(logfp, "%5lu %s ",LineNum++,dtbuf);
va_start ( arglist, format );
vfprintf (logfp, format, arglist );
//if (format[strlen(format)-1]<' ')
//format[strlen(format)-1] = 0;
fprintf(logfp,"\r\n");
fflush ( logfp );
}
void LogDbg(char *format, ... )
{
char dtbuf[30];
va_list arglist;
struct tm *today;
time_t now;
if (!debug)
return;
time(&now);
today = localtime(&now);
if( Julian != today->tm_yday+1 ) {
LogClose();
LogOpen( FileName );
}
if (logfp==NULL) return;
sprintf(dtbuf,"%02d/%02d/%04d %02d:%02d:%02d",today->tm_mon+1,today->tm_mday,
today->tm_year+1900,today->tm_hour,today->tm_min,today->tm_sec);
fprintf(logfp, "%5lu %s ",LineNum++,dtbuf);
va_start ( arglist, format );
vfprintf (logfp, format, arglist );
//if (format[strlen(format)-1]<' ')
//format[strlen(format)-1] = 0;
fprintf(logfp,"\r\n");
fflush ( logfp );
}