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Fifth.cpp
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#include "Fifth.h"
#include "cstdio.h"
#include <cmath>
#include <cstddef>
namespace Fifth {
static constexpr Real Half = 0.5;
static std::wstring toString(VM* vm, Compiled* code, const Value& v) {
switch (v.index()) {
case INTEGER:
case REAL:
case STRING:
case EXTERNAL: return asString(v);
case VALUEPTR: {
Value* ptr = (Value*) std::get<void*>(v); // NOLINT
if (code->reverse().contains(ptr)) return L"local:" + code->reverse()[ptr];
else if (vm->reverse().contains(ptr)) return L"global:" + vm->reverse()[ptr];
else return L"*" + std::to_wstring((size_t) ptr); // NOLINT
}
}
return L"";
}
static void applyOperator(VM* vm, Value op) {
String name = std::get<String>(op);
if (vm->compiling()) {
Value right = vm->pop();
Value left = vm->pop();
auto* code = dynamic_cast<Compiled*>(vm->code());
if (left.index() != VALUEPTR || std::get<VALUEPTR>(left) != nullptr) {
if (left.index() == STRING) {
String name = std::get<STRING>(left);
if (vm->dictionary().contains(name)) code->call(vm->dictionary()[name]);
} else {
code->push(left);
if (left.index() == VALUEPTR) code->call(vm->dictionary()[L"get"]);
}
}
if (right.index() != VALUEPTR || std::get<VALUEPTR>(right) != nullptr) {
if (right.index() == STRING) {
String name = std::get<STRING>(right);
if (vm->dictionary().contains(name)) code->call(vm->dictionary()[name]);
} else {
code->push(right);
if (right.index() == VALUEPTR) code->call(vm->dictionary()[L"get"]);
}
}
code->call(vm->dictionary()[name]);
vm->push((Value*) nullptr); // Dummy value to keep alorithm happy, but we know not to pus it in the code
} else vm->dictionary()[name]->exec(vm);
}
static bool hasHigherPrecedence(std::map<Value, int>& precedence, Value op1, Value op2) {
return precedence[op1] > precedence[op2];
}
void add(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
switch (left.index()) {
case INTEGER: vm->push(Integer(asReal(left) + asReal(right) + Half)); break;
case REAL: vm->push(asReal(left) + asReal(right)); break;
case STRING: vm->push(std::get<STRING>(left) + asString(right)); break;
case TABLE: (*std::get<TABLE>(left))[right] = 0; vm->push(left); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"+", right); vm->push(left); break;
case VALUEPTR:
if (right.index() > REAL) vm->push(left);
else {
Value* valptr = (Value*) std::get<VALUEPTR>(left); // NOLINT
Integer idx = asInteger(right);
valptr += idx; // NOLINT
vm->push((void*) valptr); // NOLINT
}
break;
}
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) + std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) + std::get<REAL>(right)); break;
case STRING: vm->push(std::get<STRING>(left) + std::get<STRING>(right)); break;
case TABLE: vm->push(std::get<TABLE>(left)->append(std::get<TABLE>(right))); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"+", right); vm->push(left); break;
case VALUEPTR: vm->push(left); break;
}
}
void array(VM* vm) {
if (auto val = vm->word(true); val.has_value()) {
vm->pop();
if (Value value = val.value(); value.index() == STRING) {
auto name = std::get<String>(value);
if (auto val = vm->word(true); val.has_value()) {
vm->pop();
if (Value value = val.value(); value.index() == INTEGER) {
auto size = std::get<Integer>(value);
if (vm->compiling()) {
vm->code()->locals()[name] = { 0 };
vm->code()->locals()[name].resize(size);
vm->code()->reverse()[vm->code()->locals()[name].data()] = name;
return;
}
vm->globals()[name] = { 0 };
vm->globals()[name].resize(size);
vm->reverse()[vm->globals()[name].data()] = name;
}
}
}
}
}
void algebra(VM* vm) {
if (vm->precedence().empty()) {
constexpr int BOOL = 10;
constexpr int COMP = 20;
constexpr int ADD = 30;
constexpr int MULT = 40;
constexpr int POW = 50;
constexpr int REF = 60;
vm->precedence()[L"and"] = BOOL;
vm->precedence()[L"or"] = BOOL;
vm->precedence()[L"nand"] = BOOL;
vm->precedence()[L"nor"] = BOOL;
vm->precedence()[L"xor"] = BOOL;
vm->precedence()[L"<="] = COMP;
vm->precedence()[L"<"] = COMP;
vm->precedence()[L"="] = COMP;
vm->precedence()[L"!="] = COMP;
vm->precedence()[L"<>"] = COMP;
vm->precedence()[L">"] = COMP;
vm->precedence()[L">="] = COMP;
vm->precedence()[L"+"] = ADD;
vm->precedence()[L"-"] = ADD;
vm->precedence()[L"*"] = MULT;
vm->precedence()[L"/"] = MULT;
vm->precedence()[L"%"] = MULT;
vm->precedence()[L"^"] = POW;
vm->precedence()[L"[*]"] = REF;
}
vm->syspush(L"[");
for (auto tkn = vm->word(true); tkn.has_value(); tkn = vm->word()) {
vm->pop();
Value token = tkn.value();
if (token.index() == INTEGER || token.index() == REAL) vm->push(token);
else {
if (token.index() == STRING) {
String op = std::get<String>(token);
if (op == L"(") vm->syspush(token);
else if (op == L")") {
Value systop = vm->systop();
String top = std::get<String>(systop);
while (!(top == L"[" || top == L"(")) {
applyOperator(vm, systop);
vm->syspop();
systop = vm->systop();
top = std::get<String>(systop);
}
if (top == L"[") break;
vm->syspop(); // Remove '(' or '['
} else if (vm->precedence().contains(token)){
Value systop = vm->systop();
String top = std::get<String>(systop);
while (top != L"[" && hasHigherPrecedence(vm->precedence(), systop, token)) {
applyOperator(vm, systop);
vm->syspop();
systop = vm->systop();
top = std::get<String>(systop);
}
vm->syspush(token);
} else {
String var = std::get<STRING>(token);
if (var[0] == '*') {
var = var.substr(1);
if (vm->globals().contains(var)) {
if (vm->compiling()) vm->push((Value*) vm->globals()[var].data());
else vm->push(*(vm->globals()[var].data()));
} else if (vm->code()->locals().contains(var)) {
if (vm->compiling()) vm->push((Value*) vm->code()->locals()[var].data());
else vm->push(*(vm->code()->locals()[var].data()));
}
} else {
if (vm->globals().contains(var)) vm->push(vm->globals()[var].data());
else if (vm->code()->locals().contains(var)) vm->push(vm->code()->locals()[var].data());
else vm->push(token);
}
}
} else vm->push(token);
}
}
while (asString(vm->systop()) != L"[") applyOperator(vm, vm->syspop());
vm->syspop();
if (vm->compiling()) vm->pop();
}
//
// $ syspop [ (var) 0 ] [ ] [ ]
// syspop [ (var) ] [ ] [ ]
// syspush 1 [ (var) 1 ] [ ] [ ]
//
void by(VM* vm) {
if (!vm->compiling()) return;
auto* code = dynamic_cast<Compiled*>(vm->code());
code->syspop();
vm->syspop();
vm->syspush(0);
}
void dbg(VM* vm) {
if (auto val = vm->word(true); val.has_value()) {
vm->pop();
if (vm->compiling()) return;
if (Value value = val.value(); value.index() == STRING) {
auto& dict = vm->dictionary();
auto& globals = vm->globals();
auto name = std::get<String>(value);
if (dict.contains(name)) {
if (auto* block = dynamic_cast<Compiled*>(dict[name]); block) {
size_t sz = block->size();
for (size_t i = 0; i < sz; ++i) {
cstd::out.print("%4d ", i); // NOLINT
const auto& instr = block->get(i);
switch (instr.op()) {
case Compiled::NOP: cstd::out.putString(L"NOP\r\n"); break;
case Compiled::POP: cstd::out.putString(L"POP\r\n"); break;
case Compiled::SYSPOP: cstd::out.putString(L"SYSPOP\r\n"); break;
case Compiled::RETURN: cstd::out.putString(L"RETURN\r\n"); break;
case Compiled::PUSH: cstd::out.putString(L"PUSH " + toString(vm, block, instr.value()) + L"\r\n"); break;
case Compiled::SYSPUSH: cstd::out.putString(L"SYSPUSH " + toString(vm, block, instr.value()) + L"\r\n"); break;
case Compiled::JUMP: cstd::out.putString(L"JUMP " + asString(instr.by()) + L"\r\n"); break;
case Compiled::BRANCH: cstd::out.putString(L"BRANCH " + asString(instr.by()) + L"\r\n"); break;
case Compiled::CALL:
auto* code = instr.code();
String out = L"<unknown>";
if (String nm = vm->nameOf(code); !nm.empty()) out = nm;
cstd::out.putString(L"CALL " + out + L"\r\n");
break;
}
}
} else cstd::out.putString(name + L": builtin\r\n");
} else if (globals.contains(name)) cstd::out.putString(name + L": " + asString((void*) globals[name].data()) + L"\r\n"); // NOLINT
else cstd::out.putString(asString(value) + L"\r\n");
} else cstd::out.putString(asString(value) + L"\r\n");
}
}
void def(VM* vm) {
vm->compiling(true);
if (auto val = vm->word(true); val.has_value()) {
vm->pop();
if (Value value = val.value(); value.index() == STRING) {
auto& dict = vm->dictionary();
auto& globals = vm->globals();
auto name = std::get<String>(value);
auto block = new Compiled(); // NOLINT
Code* save = vm->code();
vm->code(block);
auto& locals = block->locals();
for (; ; ) {
val = vm->word();
if (!val.has_value()) {
delete block; // NOLINT
block = nullptr;
break;
}
value = val.value();
vm->pop();
if (value.index() == STRING) {
if (String word = std::get<String>(value); word == L"end") {
block->ret();
break;
} else if (String word = std::get<String>(value); word == L"return") block->ret();
else if (dict.contains(word)) {
Code* code = dict[word];
if (code->immediate()) code->exec(vm);
else block->call(dict[word]);
} else if (globals.contains(word)) block->push((Value*) globals[word].data());
else if (locals.contains(word)) block->push((Value*) locals[word].data());
else block->push(value);
} else block->push(value);
}
if (block) {
vm->dictionary()[name] = block;
vm->nameOf(block, name);
}
vm->code(save);
}
}
vm->compiling(false);
}
void divide(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
switch (left.index()) {
case INTEGER: vm->push(Integer(asReal(left) / asReal(right) + Half)); break;
case REAL: vm->push(asReal(left) / asReal(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"/", right); vm->push(left); break;
case TABLE:
case VALUEPTR: vm->push(left); break;
case STRING: {
switch (right.index()) {
case INTEGER: {
String str = get<STRING>(left);
Integer x = std::get<INTEGER>(right);
Integer num = 0;
while (str.size() > size_t(x)) {
String front = str.substr(0, x);
vm->push(front);
++num;
str = str.substr(x);
}
vm->push(str);
++num;
vm->push(num);
}
break;
case REAL: {
String str = get<STRING>(left);
Real x = std::get<Real>(right);
Real p = 0;
Integer num = 0;
while (Real(str.size()) - p > x) {
String part = str.substr(size_t(p + Half), size_t(p + x + Half) - size_t(p));
vm->push(part);
p += x;
++num;
}
vm->push(str.substr(Integer(p + Half)));
++num;
vm->push(num);
}
break;
default:
vm->push(left);
}
}
break;
}
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) / std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) / std::get<REAL>(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"/", right); vm->push(left); break;
case TABLE:
case VALUEPTR: vm->push(left); break;
case STRING: {
String str = get<STRING>(left);
String x = std::get<String>(right);
size_t pos = 0;
Integer num = 0;
while ((pos = str.find(x)) != std::string::npos) {
String part = str.substr(0, pos);
str = str.substr(pos + x.size());
vm->push(part);
++num;
}
vm->push(str);
++num;
vm->push(num);
}
break;
}
}
void doDo(VM* vm) {
if (!vm->compiling()) return;
Compiled* code = dynamic_cast<Compiled*>(vm->code());
code->branch(1);
Integer location = Integer(code->jump(0));
vm->syspush(location);
}
void doElse(VM* vm) {
if (!vm->compiling()) return;
Compiled* code = dynamic_cast<Compiled*>(vm->code());
Integer loc = Integer(code->jump(0));
Integer prev = asInteger(vm->syspop());
code->update(int(prev), int(loc - prev));
vm->syspush(loc);
}
void doEndIf(VM* vm) {
if (!vm->compiling()) return;
Compiled* code = dynamic_cast<Compiled*>(vm->code());
Integer loc = Integer(code->location());
Integer prev = asInteger(vm->syspop());
code->update(int(prev), int(loc - prev));
}
//
// [ ] [ ] [ ]
// (var) = word [ ] [ ] [ ]
// create local (var) [ ] [ ] [ ]
// syspush (var) [ (var) ] [ ] [ ]
// $ syspush 1 [ (var) ] [ ] [ 1 ]
// syspush 1 [ (var) 1 ] [ ] [ 1 ]
//
void doFor(VM* vm) {
if (!vm->compiling()) return;
if (auto val = vm->word(true); val.has_value()) {
vm->pop();
if (Value value = val.value(); value.index() == STRING) {
auto name = std::get<String>(value);
Compiled* code = dynamic_cast<Compiled*>(vm->code());
code->locals()[name] = { 0 };
code->reverse()[vm->code()->locals()[name].data()] = name;
vm->syspush((Value*) vm->code()->locals()[name].data());
code->syspush(1);
vm->syspush(1);
}
}
}
void doReturn(VM* vm) {
if (!vm->compiling()) return;
Compiled* code = dynamic_cast<Compiled*>(vm->code());
code->ret();
}
void doWhile(VM* vm) {
if (!vm->compiling()) return;
Compiled* code = dynamic_cast<Compiled*>(vm->code());
Integer loc = Integer(code->location());
vm->syspush(loc);
}
void done(VM* vm) {
if (!vm->compiling()) return;
Compiled* code = dynamic_cast<Compiled*>(vm->code());
Integer location = Integer(code->location());
Integer jump = asInteger(vm->syspop());
Integer start = asInteger(vm->syspop());
code->update(int(jump), int(location - jump + 1));
code->jump(int(start - location - 1));
}
void equal(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
vm->push(!res);
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) == std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) == std::get<REAL>(right)); break;
case STRING: vm->push(std::get<STRING>(left) == std::get<STRING>(right)); break;
case TABLE: vm->push(std::get<TABLE>(left) == std::get<TABLE>(right)); break;
case EXTERNAL: vm->push(std::get<EXTERNAL>(left) == std::get<EXTERNAL>(right)); break;
case VALUEPTR: vm->push(std::get<VALUEPTR>(left) == std::get<VALUEPTR>(right)); break;
}
}
void explode(VM* vm) {
if (vm->size() < 1) return;
Value val = vm->top();
if (val.index() != STRING) return;
vm->pop();
String str = std::get<STRING>(val);
for (const auto ch: str) {
wchar_t buffer[2] = { 0, 0 }; // NOLINT
buffer[0] = ch;
vm->push(String(buffer)); // NOLINT
}
vm->push(Integer(str.size()));
}
void fetch(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (left.index() != TABLE) {
vm->push(left);
return;
}
Table& tbl = *std::get<TABLE>(left);
Value val = tbl[right];
vm->push(val);
}
void get(VM* vm) {
if (vm->empty()) return;
Value value = vm->pop();
if (value.index() != VALUEPTR) return;
Value* var = (Value*) std::get<void*>(value); // NOLINT
vm->push(*var);
}
void greater(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
vm->push(!res);
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) > std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) > std::get<REAL>(right)); break;
case STRING: vm->push(std::get<STRING>(left) > std::get<STRING>(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L">", right); vm->push(left); break;
case TABLE: vm->push(std::get<TABLE>(left)->size() > std::get<TABLE>(right)->size()); break;
case VALUEPTR: vm->push(std::get<VALUEPTR>(left) > std::get<VALUEPTR>(right)); break;
}
}
void greaterEqual(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
vm->push(!res);
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) >= std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) >= std::get<REAL>(right)); break;
case STRING: vm->push(std::get<STRING>(left) >= std::get<STRING>(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L">=", right); vm->push(left); break;
case TABLE: vm->push(std::get<TABLE>(left)->size() >= std::get<TABLE>(right)->size()); break;
case VALUEPTR: vm->push(std::get<VALUEPTR>(left) >= std::get<VALUEPTR>(right)); break;
}
}
void len(VM* vm) {
if (vm->size() < 1) return;
Value val = vm->pop();
if (val.index() != STRING) {
vm->push(0);
return;
}
String str = std::get<STRING>(val);
vm->push(Integer(str.size()));
}
void less(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
vm->push(!res);
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) < std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) < std::get<REAL>(right)); break;
case STRING: vm->push(std::get<STRING>(left) < std::get<STRING>(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"<", right); vm->push(left); break;
case TABLE: vm->push(std::get<TABLE>(left)->size() < std::get<TABLE>(right)->size()); break;
case VALUEPTR: vm->push(std::get<VALUEPTR>(left) < std::get<VALUEPTR>(right)); break;
}
}
void lessEqual(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
vm->push(!res);
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) <= std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) <= std::get<REAL>(right)); break;
case STRING: vm->push(std::get<STRING>(left) <= std::get<STRING>(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"<=", right); vm->push(left); break;
case TABLE: vm->push(std::get<TABLE>(left)->size() <= std::get<TABLE>(right)->size()); break;
case VALUEPTR: vm->push(std::get<VALUEPTR>(left) <= std::get<VALUEPTR>(right)); break;
}
}
void index(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (left.index() != TABLE) {
vm->push(left);
return;
}
Table& tbl = *std::get<TABLE>(left);
Value* ptr = &tbl[right];
vm->push((void*)(ptr));
}
void modulo(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
switch (left.index()) {
case INTEGER: break;
case REAL: vm->push(asInteger(right) ? abs(long(asInteger(left) % asInteger(right))) : -1); break; // NOLINT
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"%", right); vm->push(left); break;
case VALUEPTR:
case TABLE:
case STRING: vm->push(left); break;
}
return;
}
switch (left.index()) {
case INTEGER:
case REAL: vm->push(asInteger(left) % asInteger(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"%", right); vm->push(left); break;
case VALUEPTR:
case TABLE:
case STRING: vm->push(left); break;
}
}
void multiply(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
switch (left.index()) {
case INTEGER: vm->push(Integer(asReal(left) * asReal(right) + Half)); break;
case REAL: vm->push(asReal(left) * asReal(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"*", right); vm->push(left); break;
case TABLE:
case VALUEPTR: vm->push(left); break;
case STRING: {
switch (right.index()) {
case INTEGER: {
String s;
Integer n = std::get<INTEGER>(right);
String l = std::get<String>(left);
for (auto i = 0; i < n; ++i) s += l;
vm->push(s);
}
return;
case REAL: {
String s;
Real r = std::get<REAL>(right);
Integer n = r; // NOLINT
String l = std::get<String>(left);
for (auto i = 0; i < n; ++i) s += l;
n = l.size() * (r - n); // NOLINT
s += l.substr(0, n);
vm->push(s);
}
break;
}
vm->push(left);
}
break;
}
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) * std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) * std::get<REAL>(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"*", right); vm->push(left); break;
case STRING:
case TABLE:
case VALUEPTR: vm->push(left); break;
}
}
//
// [ (var) (loc) (loc2) [ ] [ (by) (to) ]
// (loc2) = syspop [ (var) (loc) ] [ ] [ (by) (to) ]
// (loc) = syspop [ (var) ] [ ] [ (by) (to) ]
// (var) = syspop [ ] [ ] [ (by) (to) ]
// $ push (var) [ ] [ (var) ] [ (by) (to) ]
// $ dup [ ] [ (var) (var) ] [ (by) (to) ]
// $ sysover [ ] [ (var) (var) ] [ (by) (to) (by) ]
// $ call get [ ] [ (var) <res> ] [ (by) (to) (by) ]
// $ call move [ ] [ (var) <res> (by) ] [ (by) (to) ]
// $ call + [ ] [ (var) <res> ] [ (by) (to) ]
// $ call <- [ ] [ ] [ (by) (to) ]
// $ (loc3) = jump (loc) [ ] [ ] [ (by) (to) ]
// update jump at (loc2) to (loc3) [ ] [ ] [ (by) (to) ]
// $ syspop [ ] [ ] [ (by) ]
// $ syspop [ ] [ ] [ ]
//
void next(VM* vm) {
if (!vm->compiling()) return;
Value loc2 = vm->syspop();
Value loc = vm->syspop();
Value var = vm->syspop();
Compiled* code = dynamic_cast<Compiled*>(vm->code());
code->push(var);
code->call(vm->dictionary()[L"dup"]);
code->call(vm->dictionary()[L"sysover"]);
code->call(vm->dictionary()[L"get"]);
code->call(vm->dictionary()[L"move"]);
code->call(vm->dictionary()[L"+"]);
code->call(vm->dictionary()[L"<-"]);
size_t loc3 = code->location();
code->jump(int(asInteger(loc) - loc3 - 2));
code->update(int(asInteger(loc2)), int(loc3 - asInteger(loc2) + 1));
code->call(vm->dictionary()[L"syspop"]);
code->call(vm->dictionary()[L"syspop"]);
}
void notEqual(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
vm->push(res);
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) != std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) != std::get<REAL>(right)); break;
case STRING: vm->push(std::get<STRING>(left) != std::get<STRING>(right)); break;
case EXTERNAL: vm->push(std::get<EXTERNAL>(left) != std::get<EXTERNAL>(right)); break;
case TABLE: vm->push(std::get<TABLE>(left)->size() != std::get<TABLE>(right)->size()); break;
case VALUEPTR: vm->push(std::get<VALUEPTR>(left) != std::get<VALUEPTR>(right)); break;
}
}
void power(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (right.index() > REAL || left.index() > REAL) {
vm->push(left);
return;
}
Real n1 = asReal(left);
Real n2 = asReal(right);
vm->push(pow(n1, n2)); // NOLINT
}
void resize(VM* vm) {
if (vm->size() < 2) return;
Value val = vm->pop();
Integer size = asInteger(val);
if (size < 1) return;
val = vm->pop();
if (val.index() != VALUEPTR) return;
Value* ptr = (Value*)(std::get<VALUEPTR>(val)); // NOLINT
if (vm->code()) {
Code* code = vm->code();
String name = code->reverse()[ptr];
code->locals()[name].resize(size);
} else {
String name = vm->reverse()[ptr];
vm->globals()[name].resize(size);
}
}
void size(VM* vm) {
if (vm->size() < 1) return;
Value val = vm->pop();
if (val.index() != VALUEPTR) {
vm->push(0);
return;
}
Value* ptr = (Value*)(std::get<VALUEPTR>(val)); // NOLINT
if (vm->code()) {
Code* code = vm->code();
String name = code->reverse()[ptr];
vm->push(Integer(code->locals()[name].size()));
} else {
String name = vm->reverse()[ptr];
vm->push(Integer(vm->globals()[name].size()));
}
}
//
// [ (var) 1/0 ] [ (start) (t) ?(b) ] [ ?1 ]
// if (syspop == 1) $ move [ (var) ] [ (start) (to) (by) ] [ ]
// $ sysmove [ (var) ] [ (start) (to) ] [ (by) ]
// $ sysmove [ (var) ] [ (start) ] [ (by) (to) ]
// (var) = systop [ (var) ] [ (start) ] [ (by) (to) ]
// $ push (var) [ (var) ] [ (start) (var) ] [ (by) (to) ]
// $ call -> [ (var) ] [ ] [ (by) (to) ]
// $ (loc) = sysdup [ (var) ] [ ] [ (by) (to) (to) ]
// syspush (loc) [ (var) (loc) ] [ ] [ (by) (to) (to) ]
// $ call move [ (var) (loc) ] [ (to) ] [ (by) (to) ]
// $ push (var) [ (var) (loc) ] [ (to) (var) ] [ (by) (to) ]
// $ call get [ (var) (loc) ] [ (to) <res> ] [ (by) (to) ]
// $ call sysover [ (var) (loc) ] [ <res> ] [ (by) (to) (by) ]
// $ call move [ (var) (loc) ] [ <res> (by) ] [ (by) (to) ]
// $ push 0 [ (var) (loc) ] [ <res> (by) 0 ] [ (by) (to) ]
// $ call '>' [ (var) (loc) ] [ <res> <res> ] [ (by) (to) ]
// $ branch 2 [ (var) (loc) ] [ <res> ] [ (by) (to) ]
// $ call '<=' [ (var) (loc) ] [ ] [ (by) (to) ]
// $ JUMP 1 [ (var) (loc) ] [ ] [ (by) (to) ]
// $ call '>=' [ (var) (loc) ] [ <res> ] [ (by) (to) ]
// $ branch 1 [ (var) (loc) ] [ ] [ (by) (to) ]
// $ (loc2) = jump 0 [ (var) (loc) ] [ ] [ (by) (to) ]
// syspush (loc2) [ (var) (loc) (loc2) ] [ ] [ (by) (to) ]
//
void step(VM* vm) {
if (!vm->compiling()) return;
Compiled* code = dynamic_cast<Compiled*>(vm->code());
if (asInteger(vm->syspop()) == 1) code->call(vm->dictionary()[L"move"]);
code->call(vm->dictionary()[L"sysmove"]);
code->call(vm->dictionary()[L"sysmove"]);
Value var = vm->systop();
code->push(var);
code->call(vm->dictionary()[L"->"]);
size_t loc = code->call(vm->dictionary()[L"sysdup"]);
vm->syspush(Integer(loc));
code->call(vm->dictionary()[L"move"]);
code->push(var);
code->call(vm->dictionary()[L"get"]);
code->call(vm->dictionary()[L"sysover"]);
code->call(vm->dictionary()[L"move"]);
code->push(0);
code->call(vm->dictionary()[L">"]);
code->branch(2);
code->call(vm->dictionary()[L"<="]);
code->jump(1);
code->call(vm->dictionary()[L">="]);
code->branch(1);
size_t loc2 = code->jump(0);
vm->syspush(Integer(loc2));
}
void storeLeft(VM* vm) {
if (vm->size() < 2) return;
Value value = vm->pop();
Value var = vm->pop();
if (var.index() != VALUEPTR) return;
Value* varPtr = (Value*) std::get<VALUEPTR>(var); // NOLINT
*varPtr = value;
}
void storeRight(VM* vm) {
if (vm->size() < 2) return;
Value var = vm->pop();
Value value = vm->pop();
if (var.index() != VALUEPTR) return;
Value* varPtr = (Value*) std::get<VALUEPTR>(var); // NOLINT
*varPtr = value;
}
void subtract(VM* vm) {
if (vm->size() < 2) return;
Value right = vm->pop();
Value left = vm->pop();
if (bool res = left.index() != right.index(); res) {
switch (left.index()) {
case INTEGER: vm->push(Integer(asReal(left) - asReal(right) + Half)); break;
case REAL: vm->push(asReal(left) - asReal(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"-", right); vm->push(left); break;
case TABLE: vm->push(std::get<TABLE>(left)->erase(right)); break;
case VALUEPTR: vm->push(left); break;
case STRING: {
auto s = std::get<STRING>(left);
switch (right.index()) {
case INTEGER:
case REAL: {
auto x = asInteger(right);
if (x > s.size()) s = L"";
else s = s.substr(0, s.size() - x);
}
break;
}
vm->push(s);
}
break;
}
return;
}
switch (left.index()) {
case INTEGER: vm->push(std::get<INTEGER>(left) - std::get<INTEGER>(right)); break;
case REAL: vm->push(std::get<REAL>(left) - std::get<REAL>(right)); break;
case EXTERNAL: std::get<EXTERNAL>(left)->send(vm, L"-", right); vm->push(left); break;
case TABLE: vm->push(std::get<TABLE>(left)->erase(right)); break;
case VALUEPTR: vm->push(left); break;
case STRING: {
auto s = asString(left);
auto r = asString(right);
if (size_t p = s.find(r); p != std::string::npos) s = s.substr(0, p) + s.substr(p + r.size());
}
break;
}
}
void table(VM* vm) {
}
void then(VM* vm) {
if (vm->compiling()) {
Compiled* code = dynamic_cast<Compiled*>(vm->code());
code->branch(1);
auto loc = code->jump(0);
vm->syspush(Integer(loc));
}
}
void var(VM* vm) {
if (auto val = vm->word(true); val.has_value()) {
vm->pop();
if (Value value = val.value(); value.index() == STRING) {
auto name = std::get<String>(value);
if (vm->compiling()) {
vm->code()->locals()[name] = { 0 };
vm->code()->reverse()[vm->code()->locals()[name].data()] = name;
return;
}
vm->globals()[name] = { 0 };
vm->reverse()[vm->globals()[name].data()] = name;
}
}
}
void word(VM* vm) {
String& buffer = vm->buffer();
while (!buffer.empty() && isspace(buffer[0])) buffer = buffer.substr(1);
// if begins and ends with same quote: push string
String wrd;
if (!buffer.empty() && (buffer.front() == '"' || buffer.front() == '\'')) {
auto quote = buffer[0];
buffer = buffer.substr(1);
bool escape = false;
while (!buffer.empty() && (escape || buffer[0] != quote)) {
if (escape) {
escape = false;
switch (buffer[0]) {
case 'n': wrd += L"\n"; break;
case 'r': wrd += L"\r"; break;
case 't': wrd += L"\t"; break;
case '\\': wrd += L"\\"; break;
default: wrd += buffer[0]; break;
}
} else {
if (buffer[0] == '\\') escape = true;
else wrd += buffer[0];
}
buffer = buffer.substr(1);
}
if (buffer.empty()) vm->push(quote + wrd);
else {
buffer = buffer.substr(1);
vm->push(wrd);
}
return;
}
else {
while (!buffer.empty() && !isspace(buffer[0])) {
wrd += buffer[0];
buffer = buffer.substr(1);
}
if (wrd.empty()) return;
}
// if it could be anumber of some sort
if (auto ch = wrd[0]; ch == '-' || isdigit(ch)) {
// if it's an integer: push integer
size_t pos = 0;
try {
Integer num = std::stoll(wrd, &pos);
if (pos == wrd.size()) {
vm->push(num);
return;
}
} catch (...) { }