C - switch/goto coroutine example

switch_goto_coroutine.c

#include <stdint.h>

uint8_t next (uint8_t *data) {
    static int running = 0;
    static uint8_t *current;

    switch (running) {
        case 0: goto L0;
        case 1: goto L1;
    }

    L0:
    running = 1;
    current = data;
    while (current) {
        printf("%c\n", *(current));
        current = (++current);
        return *(current);
        L1:;
    } 
}

int main () {
    while(next("ITERATE UNTIL THE END") != '\0') {}
}