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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
typedef struct transfer {
int id;
char input;
int next;
char output;
int move;
bool end;
} transfer;
transfer transfers[128];
int transferptr = 0;
int count = 0;
char tape[4096] = {0};
char *head = tape;
int main() {
FILE *f = fopen("test.mac", "r");
strcat(tape, "1110");
char *line = malloc(128);
while (fgets(line, 128, f) != NULL) {
char *tok = strtok(line, " "); // input
transfers[count].id = atoi(tok);
tok = strtok(NULL, " ");
if (tok[0] == '*') transfers[count].input = -1;
else transfers[count].input = tok[0];
tok = strtok(NULL, " "); // next
transfers[count].next = atoi(tok);
tok = strtok(NULL, " "); // output
transfers[count].output = tok[0];
tok = strtok(NULL, " "); // offset
transfers[count].move = atoi(tok);
tok = strtok(NULL, " "); // end
transfers[count].end = atoi(tok); // must be 1 or 0
count++;
line = malloc(128);
}
for (;;) {
for (int i = 0; i < count; i++) {
if (transfers[i].id == transferptr) {
if (transfers[i].input == -1 || *head == transfers[i].input) {
*head = transfers[i].output;
head += transfers[i].move;
transferptr = transfers[i].next;
if (transfers[transferptr].end) break;
break;
}
}
}
}
printf("%s\n", tape);
return 0;
}
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