A short C program to parse tab separated UoS module timetable data to Google .csv format.

shef2csv.c

/* ---------------------------------------------------------------------------------
 
 SHEF2CSV by Will Pearson
 
 A simple C program for converting tab separated UoS module timetable data to Google
 .csv format.
 
 Usage: redirect stdin/stdout, e.g.
 
 $ ./shef2csv < input.txt > output.csv
 
 Notes:
 - issue with week number ranges. Duplicate lines to remove ranges before running.
 - no special handling of empty cells
 
 To Do:
 - convert "lastname,firstname" to "firstname lastname"
 
--------------------------------------------------------------------------------- */


#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#define MAXLINE	1000	/* maximum input line size */

int getline(char line[], int maxline);
void getdate1(char dow[], char week[], char date[]);

int j=0; // string counter

/* read tab separated values into separate (jth) string and print in special format */
int main ()
{
	int len;
	char line[10][MAXLINE];
	char date[11];
	date[10] = '\0'; // date string terminated with null character
	
	/* print header row */
	printf("Subject,Start Date,Start Time,End Date,End Time,Location,Description\n");
		
	while ((len = getline(line[j], MAXLINE)) > 0)
		if (j == 0) { // i.e. a full line has been read...
			getdate1(line[3], line[6], date);
			
			/* Example format: "CIV400 LECT","08/05/2012","14:00","16:00","MAPP-LT07,
			 Mappin Building","Lecture for CIV400 - Portfolio with Huang,Wei at MAPP-LT07" */
			printf("\"%s %s\",\"%s\",\"%s\",\"%s\",\"%s\",\"%s, %s\","
				   "\"%s for %s - %s with %s at %s\"\n",line[0], line[2], date, line[4], date, 
				   line[5], line[7], line[8], line[2], line[0], line[1], line[9], line[7]);
		}
	
	return 0;
}

/* getline: read a line into s, return length */
int getline(char s[], int lim)
{
	int i;
	char c;

	for (i=0; i<lim-1 && (c=getchar())!=EOF && c!='\n' && c!='\t'; ++i)
		s[i] = c;
	
	if (c == '\t') // begin next string after tab entry
		++j;
	
	if (c == '\n') // reset string counter on newline entry
		j = 0;

	s[i] = '\0'; // terminate string

	return i;
}

/* getdate: read week number and day and work out date */
void getdate1(char dow[], char week[], char date[])
{
	int weeknum, wday, days_to_add;
	struct tm * newtime;
	struct tm str_time;
	time_t time_of_day;
	
	/* Day */
	if (dow[0] == 'M')					// Monday
		wday = 1;
	if (dow[0] == 'T' && dow[1] == 'u')	// Tuesday
		wday = 2;
	if (dow[0] == 'W')					// Wednesday
		wday = 3;
	if (dow[0] == 'T' && dow[1] == 'h')	// Thursday
		wday = 4;
	if (dow[0] == 'F')					// Friday
		wday = 5;
	if (dow[0] == 'S' && dow[1] == 'a')	// Saturday
		wday = 6;
	if (dow[0] == 'S' && dow[1] == 'u')	// Sunday
		wday = 0;
	
	/* Week */
	weeknum = atoi(week);
	
	days_to_add = weeknum * 7 + wday;
	
	/* Week '0' begins 18/09/2011 */
	str_time.tm_year = 2011-1900;
	str_time.tm_mon = 9-1;
	str_time.tm_mday = 18+days_to_add;
	str_time.tm_hour = 0;
	str_time.tm_min = 0;
	str_time.tm_sec = 0;
	str_time.tm_isdst = 0;
	
	/* Normalise date and save in dd/mm/yyyy format */
	time_of_day = mktime(&str_time);	
	newtime = localtime(&time_of_day);
	strftime(date,10,"%d/%m/%Y",newtime);
}