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cicalendar

Strsep and iCalendar parsing in C

I'm having trouble parsing a simple iCalendar file in C.

char * description, * identifier, *tofree;
tofree = description = strdup(string);
identifier = strsep(&description, ":");
printf("{%s}\n", identifier);
printf("[%s]\n", description);
free(tofree);

string would be the line I just read from the file, such as: BEGIN:VCALENDAR When I run this program, I get the following output:

{BEGIN}
]VCALENDAR

Can someone please help me determine what's causing this issue? The output should show "[VCALENDAR]" and I'm not sure why this is occurring.

Solution

  • Your input data ends with a carriage return, \r. Your code outputs:

    [VCALENDAR\r]\n

    and the carriage return places the cursor at the start of the line so the ] overwrites your [.

    It's probably best to remove the line ending before scanning; failing that, include \r and \n in the delimiters provided to strsep(), but you'd have to use strsep() a second time to get the VCALENDAR token.