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Diffstat (limited to 'reference/C/CONTRIB/SNIP/log.c')
| -rwxr-xr-x | reference/C/CONTRIB/SNIP/log.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/reference/C/CONTRIB/SNIP/log.c b/reference/C/CONTRIB/SNIP/log.c new file mode 100755 index 0000000..e306db9 --- /dev/null +++ b/reference/C/CONTRIB/SNIP/log.c @@ -0,0 +1,216 @@ +/************************************************************************
+* LOG.C - Creates a ASCII file with time and date stamps for logging *
+* hours. *
+* *
+* usage: LOG [IN][OUT][CALC] *
+* IN - Creates an opening entry from which a "time spent" *
+* is calculated. *
+* OUT - Creates a closing entry and calculates *
+* "time spent" for that entry. *
+* CALC - Calculates total overall "time spent" for the *
+* entire log. *
+* *
+* NOTES: I used seconds to do all the calculations. The other *
+* time/date entries are for human readability. Some *
+* enhancments can be done to this program. *
+* i.e. Wage/Pay calculation, closing the log after a CALC *
+* to insure log is not reused, tracking hours for individual *
+* people, tracking hours for individual projects, etc. *
+* *
+* Public domain by Robert Sprawls. *
+************************************************************************/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include <time.h>
+
+/* Define time file constants */
+
+#define HOUR 3600 /* Number of seconds in an hour. */
+#define MINS 60 /* Number of seconds in a minute */
+#define IN_ENTRY 40 /* Size of an IN entry */
+#define SEC_OFF 4 /* Offset of seconds in an IN entry */
+#define HOUR_OFF 64 /* Offset of seconds in an "time spent" */
+ /* calculated entry. */
+
+/* Define values returned to DOS */
+
+#define OK 0 /* Executed normally, nothing will be eched */
+#define OPENLOG 1 /* Attempted to log in while open entry in log */
+#define CLOSEDLOG 2 /* Attempted to log out while closed entry in log */
+#define FILE_ERROR 3 /* File access error. Just in case. */
+#define SEEK_ERROR 4 /* File positioning error */
+#define NOPARMS 5 /* No parameters supplied to program */
+#define INVALID 6 /* Invalid parameters */
+
+void usage( void );
+long get_in_entry( FILE * );
+void fastforw( FILE * ); /* Oppisite of rewind(); */
+void quit( int );
+
+char strbuf[ IN_ENTRY + 1 ];
+FILE *wrklog;
+
+int main( int argc, char *argv[] )
+{
+ char outline[ IN_ENTRY * 2 + 1 ];
+ long in_entry_time = 0, total_seconds = 0;
+ double hours, pay;
+ time_t current_time;
+ div_t hdiv, mdiv;
+
+ if( argc < 2 )
+ {
+ usage();
+ quit( NOPARMS );
+ }
+
+ /* Open log. Can be any directory. */
+ if(( wrklog = fopen( "WORK.LOG", "a+" )) == NULL )
+ quit( FILE_ERROR );
+
+ strupr( argv[ 1 ] );
+
+ time( ¤t_time );
+
+ /* Create an opening IN entry. */
+ if( strcmp( "IN", argv[ 1 ] ) == 0 )
+ {
+ /* Make sure there isn't a open entry already. */
+ if( get_in_entry( wrklog ) )
+ quit( OPENLOG );
+
+ /* Stamp it. */
+ fprintf( wrklog, "%3s %ld %s", argv[ 1 ], current_time,
+ ctime( ¤t_time ));
+ }
+ /* Create a closinf OUT entry. */
+ else if( strcmp( "OUT", argv[ 1 ] ) == 0 )
+ {
+ /* Make sure there is a previous IN entry. */
+ if( ( in_entry_time = get_in_entry( wrklog )) == 0 )
+ quit( CLOSEDLOG );
+
+ total_seconds = current_time - in_entry_time;
+ sprintf( outline, "%3s %ld %s", argv[ 1 ], current_time,
+ ctime( ¤t_time ));
+
+ /* Cut off the newline character that's normally put on. */
+ outline[ strlen( outline ) - 1 ] = '\0';
+ hdiv = div( total_seconds, HOUR );
+ mdiv = div( hdiv.rem, MINS );
+
+ sprintf( strbuf, " Time Spent: %02d:%02d:%02d/%ld\n\n",
+ hdiv.quot, mdiv.quot, mdiv.rem, total_seconds );
+ strcat( outline, strbuf );
+ fprintf( wrklog, outline );
+ }
+ /* Calculate the overall "time spent" */
+ else if( strcmp( "CALC", argv[ 1 ] ) == 0 )
+ {
+ rewind( wrklog );
+ while( !feof( wrklog ) )
+ {
+ /* This is to eliminate garbage or residual entries. */
+ outline[ 0 ] = '\0';
+
+ fgets( outline, 80, wrklog );
+ if( strstr( outline, "OUT" ) != NULL )
+ {
+ total_seconds += atol( &outline[ HOUR_OFF ] );
+ }
+
+ }
+
+ /* goto to end of file and stamp total hours */
+ fastforw( wrklog );
+ if( total_seconds )
+ {
+ hdiv = div( total_seconds, HOUR );
+ mdiv = div( hdiv.rem, MINS );
+ fprintf( wrklog, "\t\t\t\t\t\t\t\t\t\t "
+ "Total Hours: %02d:%02d:%02d/%ld\n",
+ hdiv.quot, mdiv.quot, mdiv.rem, total_seconds );
+ }
+ }
+ else
+ {
+ usage();
+ quit( INVALID );
+ }
+
+ quit( OK );
+}
+
+void usage( void )
+{
+ printf( "\nusage: LOG [IN][OUT][CALC]\n");
+}
+
+/****************************************************************
+* get_in_entry - gets a previous IN entry. *
+* *
+* Params: FILES *fp - file pointer. *
+* Returns: The entry's seconds if successful, else 0 *
+* *
+* NOTES: If fseek fails for any reason, function does not *
+* return. Instead, quit is call with the error code. *
+****************************************************************/
+
+long get_in_entry( FILE *fp )
+{
+
+ if( fseek( fp, -IN_ENTRY, SEEK_END ) != 0 )
+ quit( SEEK_ERROR );
+
+ fread( strbuf, 1, IN_ENTRY, fp );
+ fastforw( fp );
+
+ if( strstr( strbuf, "IN" ) == NULL )
+ return( 0 );
+ else
+ {
+ return( atol( &strbuf[ SEC_OFF ]));
+ }
+}
+
+/****************************************************************
+* quit() - Program exit function. Reports of any outstanding *
+* errors. *
+* *
+* Params: errcode - Error code as defined in beginning. *
+* Returns: nothing. *
+****************************************************************/
+
+void quit( int errcode )
+{
+ char *errmsg[] =
+ {
+ "",
+ "Log has an open entry.",
+ "No corresponding IN entry.",
+ "File open error.",
+ "Seek error",
+ "No parameters specified.",
+ "Invalid Parameters."
+ };
+
+ printf( "\n%s\n", errmsg[ errcode ] );
+
+ fclose( wrklog );
+ exit( errcode );
+}
+
+/****************************************************************
+* fastforw() - Puts file pointer to end of file. *
+* *
+* Params: fp - File pointer. *
+* Returns: nothing. *
+****************************************************************/
+
+void fastforw( FILE *fp )
+{
+ fseek( fp, 0, SEEK_END );
+}
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