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Fixed bug for nested loops.

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This commit is contained in:
id101010
2016-11-09 00:15:40 +01:00
parent 52f29e1b1d
commit 4e62be46f7
2 changed files with 22 additions and 4 deletions
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24
bfckr.c
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@@ -39,6 +39,8 @@ void die(const char *message)
// Parses and executes a brainfuck expression
void bfuck_parser(char *input)
{
int loop = 0;
for(size_t i = 0; input[i] != 0; i++) { // where i is the instruction pointer
switch(input[i]) {
case '>':
@@ -68,8 +70,16 @@ void bfuck_parser(char *input)
case '[':
if(*p == 0) { // if the byte at the data pointer is zero
// jump forward to the command after the next ]
while(input[i] != ']') {
loop = 1;
// jump back to the command after the matching [
while(loop > 0) {
i++;
if(input[i] == '[') {
loop++;
}
if(input[i] == ']') {
loop--;
}
}
} else {
continue; // increment instruction pointer
@@ -78,10 +88,18 @@ void bfuck_parser(char *input)
case ']':
if(*p != 0) { // if the byte at the data pointer is nonzero
// jump back to the command after the previous [
while(input[i] != '[') {
loop = 1;
// jump back to the command after the matching [
while(loop > 0) {
i--;
if(input[i] == '[') {
loop--;
}
if(input[i] == ']') {
loop++;
}
}
} else {
continue; // increment instruction pointer
}