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interpret_unsafe_optimised.cpp
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interpret_unsafe_optimised.cpp
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#include "interpret_unsafe_optimised.hpp"
void interpret_opt_unsafe(
const std::vector<insn_t>& opt_program,
std::vector<uint16_t>& mem_tape,
std::stack<size_t>& bracket_insn_pointers
)
{
size_t data_pointer = 0;
size_t insn_pointer = 0;
size_t brackets_to_skip = 0;
for(size_t ipt = 0; ipt < opt_program.size(); ipt++)
{
switch(opt_program[ipt].type)
{
case CLEAR:
mem_tape[data_pointer] = 0;
break;
case PLUS:
mem_tape[data_pointer] += opt_program[ipt].count;
break;
case MINUS:
mem_tape[data_pointer] -= opt_program[ipt].count;
break;
case LEFT:
data_pointer -= opt_program[ipt].count;
break;
case RIGHT:
data_pointer += opt_program[ipt].count;
break;
case DOT:
for(int j = opt_program[ipt].count; j > 0; j--)
fmt::printf("%lc", mem_tape[data_pointer]);
break;
case COMMA:
/*
fmt::print("\x1b\7");
mem_tape[data_pointer] = getchar();
fflush(stdin);
fmt::print("\x1b\10\x1b[1C\x1b[1A");
*/
mem_tape[data_pointer] = getchar();
break;
case LBRACKET:
if(mem_tape[data_pointer] == 0)
{
brackets_to_skip = 1;
size_t j = ipt;
while(brackets_to_skip)
{
j++;
if(opt_program[j].type == LBRACKET) { brackets_to_skip++; }
if(opt_program[j].type == RBRACKET) { brackets_to_skip--; }
if(brackets_to_skip == 0) { ipt = j; break; }
}
} else
{
bracket_insn_pointers.push(ipt-1);
}
break;
case RBRACKET:
ipt = bracket_insn_pointers.top();
bracket_insn_pointers.pop();
break;
default:
break;
}
}
return;
}