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type byte := char;
func putstr(char[] str) {
int i := 0;
while (str[i] != '\0') {
putc(str[i]);
i = i + 1;
}
}
func int[] makejumpmap(char[] src, int srclen) {
int[] jm := new int[srclen];
int[] stack := new int[srclen];
int stkp := 0;
int i := 0;
while (i < srclen) {
// putint(i); putc(' '); putint(stkp); putc(' '); putc(src[i]); putc('\n');
if (src[i] == '[') {
stack[stkp] = i;
stkp = stkp + 1;
}
if (src[i] == ']') {
stkp = stkp - 1;
int j := stack[stkp];
jm[i] = j;
jm[j] = i;
}
i = i + 1;
}
if (stkp != 0) {
putstr("Unmatched opening brackets in BF source\n");
exit(1);
}
/*i = 0;
while (i < srclen) {
putint(jm[i]);
putc(' ');
i = i + 1;
}
putc('\n');*/
return jm;
}
func interpret(char[] src, int srclen) {
int[] jm := makejumpmap(src, srclen);
byte[] mem := new char[4088];
int ip := 0;
int memp := 0;
while (src[ip] != '\0') {
// putint(ip); putc('\n');
char c := src[ip];
if (c == '+') {mem[memp] = mem[memp] + byte(1);}
if (c == '-') {mem[memp] = mem[memp] - byte(1);}
if (c == '>') {memp = memp + 1;}
if (c == '<') {memp = memp - 1;}
if (c == '.') {putc(mem[memp]);}
if (c == ',') {mem[memp] = byte(getc());}
if (c == '[') {
if (mem[memp] == '\0') {
ip = jm[ip];
}
}
if (c == ']') {
if (mem[memp] != '\0') {
ip = jm[ip];
}
}
ip = ip + 1;
}
// debugger;
putc('\n');
memp = 0;
while (memp < 10) {
putint(int(mem[memp]) & 0xff); putc(' ');
memp = memp + 1;
}
putc('\n');
}
func int main() {
int bufsize := 12280;
char[] source := new char[12280];
int sourcelen := 0;
while (1) {
int c := getc();
// putc(char(c));
if (c < 0) {
break;
} else {
source[sourcelen] = char(c);
sourcelen = sourcelen + 1;
if (sourcelen >= bufsize - 1) {
break;
}
}
}
source[sourcelen] = '\0';
interpret(source, sourcelen);
return 0;
}
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