Thread: EOL characters

Originally Posted by exareth

Is there any way to get the number of characters that are used to terminate the line when using fputs (for example)?

Though I'd except this is possible, I could find anything in a C reference or on Google.

An alternative is using fgetpos(). Would this cause a performance hit?

open file in text mode for writing, fputs the empty string
close file - open it in the binary mode for reading - check how many chars you can read from it

Code:

#include <stdio.h>

int main(int argc, char *argv[]) {
    int eol_len = 0;
    FILE *fp;
    if((fp = fopen("/tmp/eolchartest", "wt")) == NULL) ; /* should print an error and exit here . . . use a random name as well */
    fputs("\n", fp);
    fclose(fp);
    if((fp = fopen("/tmp/eolchartest", "rb")) == NULL) ; /* should print an error and exit here . . . use the above random name as well */
    while(fgetc(fp) != EOF) eol_len ++;
    fclose(fp);
    printf("eol_len: %i\n", eol_len);
    return 0;
}

This works. Gives 1 for UNIX-style EOL chars, 2 for DOS-style EOLs.