#include <stdio.h>

const char *usage = "\
wrap - wrap a text file.\n\
Usage: wrap <infile> <outfile>\n";

int main(int argc, char **argv)
{
	if ( argc < 3 ) {
		printf("%s", usage);
		return 1;
	}

	FILE *in = fopen(argv[1], "r");
	FILE *out = fopen(argv[2], "w");
	int cn = 0;
	char c = 0x00;

	if ( !in || !out ) {
		printf("Failed to open input/output file.\n");
		in ? fclose(in) : 0 ;
		out ? fclose(out) : 0 ;
		return 1;
	}

	while ( !feof(in) ) {
		c = fgetc(in);
		if ( cn > 60 && 
			( c == ' ' || c == '\n' || c == '\t' )) {
			fputc('\n', out);
			cn = 0;
			if ( c != '\t' ) continue;
		}
		fputc(c, out);
		cn++;
	}

	fclose(in);
	fclose(out);
	return 0;
}