Easily write CSV files, without worrying about escapes.

easy-csv.c

#include <stdio.h>
#include <stdarg.h>

size_t counter(char *str) {
	size_t commas = 0;
	int string = 0;
	
	while (*str) {
		//escape commas inside string;
		if (*str == '"' && *(str - 1) != '\\') string = !string;
		
		//count commas
		if (string == 0)
			if (*str == ',') commas++;
		str++;
	}
		
	return commas+1;
}

void csv_write(FILE *fp, size_t count, ...) {
	va_list args;
	va_start(args, count);
	
	while (count--) {
		fprintf(fp, "\"%s\";", va_arg(args, char*));
	}
}
#define csv_write(fp, ...) csv_write(fp, counter(#__VA_ARGS__), __VA_ARGS__)

void csv_new_line(FILE *fp) {
	fprintf(fp, "\n");
}

/*///////////////////////////////////
	
		Testing:
		
///////////////////////////////////*/

int main() {
	FILE *fp = fopen("foo.csv", "w");
	
	csv_write(fp, "foo", "", "123");
	csv_new_line(fp);
	csv_write(fp, "bar", "foobar;123;abc", "abc\ndef");
	
	fclose(fp);
}