86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/*
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* Parsodus - A language agnostic parser generator
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* Copyright © 2016-2017 Thomas Avé, Robin Jadoul, Kobe Wullaert
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "generator.h"
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#include "instruction.h"
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#include <iostream>
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#include <cstring>
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namespace bf {
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void Generator::run() {
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counter = 0;
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std::memset(array, 0, sizeof(array));
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while (!lbrackets.empty())
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lbrackets.pop();
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for (std::size_t instruct = 0; instruct < program.size(); instruct++) {
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switch(program[instruct]) {
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case Instruction::EMPTY: break;
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case Instruction::PLUS:
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array[counter]++;
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break;
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case Instruction::MINUS:
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array[counter]--;
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break;
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case Instruction::GREATER:
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if (++counter == 30000) {
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std::cout << "Tried to access unavailable memory" << std::endl;
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return;
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} break;
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case Instruction::LESS:
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if (--counter == -1) {
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std::cout << "Tried to access unavailable memory" << std::endl;
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return;
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} break;
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case Instruction::POINT:
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std::cout << (char)array[counter];
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break;
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case Instruction::COMMA:
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char c;
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std::cin >> c;
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array[counter] = (int)c;
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break;
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case Instruction::LBRACKET:
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lbrackets.push(instruct);
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if (array[counter] == 0)
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while (program[++instruct] != Instruction::RBRACKET) {}
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break;
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case Instruction::RBRACKET:
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if (array[counter] != 0)
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instruct = lbrackets.top();
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else
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lbrackets.pop();
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break;
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default: // Won't happen
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break;
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}
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}
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}
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} // namespace bf
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