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import std.stdio;
import std.string;
import std.conv;
import chunk;
import parser;
//import parser;
//import dbg;
//import value;
//bool DEBUG = true;
bool DEBUG = false;
void printForm(Form f, string prefix = "") {
switch (f.type) {
case FormType.EOF:
writeln("eof");
return;
case FormType.ATOM:
writefln("%s atom: %s", prefix, atomAsString(cast(Atom)f));
break;
case FormType.CONS:
Cons c = cast(Cons)f;
writef("%s cons <", prefix);
if (c.evaluate) {
writeln("true>");
} else {
writeln("false>");
}
printForm(c.head, format("%s>", prefix));
foreach (Form i ; c.tail) {
printForm(i, format("%s>", prefix));
}
break;
case FormType.NIL:
writefln("%s NIL", prefix);
break;
case FormType.PARSE_ERROR:
ParseError pe = cast(ParseError)f;
writefln("ERROR: %s", pe.message);
break;
case FormType.SYMBOL:
Symbol s = cast(Symbol)f;
writefln("%s sym: %s", prefix, s.name);
break;
case FormType.FUNC:
Func func = cast(Func)f;
writefln("%s <fn %s>", prefix, func.name.name);
printForm(func.args, format("%s -", prefix));
writefln("%s with %d body lines", prefix, func.funcBody.length);
writefln("%s <end fn %s>", prefix, func.name.name);
break;
case FormType.DEF:
Def def = cast(Def)f;
writefln("%s var: %s", prefix, def.name.name);
break;
case FormType.BLOCK:
Block block = cast(Block)f;
writefln("%s block of %d", prefix, block.blockBody.length);
break;
default:
writeln("printFormDefault");
break;
}
}
string printableValue(Value val) {
switch (val.type) {
case ValueType.STRING:
return val.as.str;
case ValueType.NUMBER:
return format("%g", val.as.number);
case ValueType.BOOLEAN:
if (val.as.boolean) {
return "true";
} else {
return "false";
}
case ValueType.OBJ:
return printableFunction(val.as.obj);
case ValueType.TYPE:
return val.as.type;
case ValueType.NIL:
return "nil";
case ValueType.SEQ:
return printableSeq(val.as.seq);
default:
return "! unknown value type !";
}
}
string printableSeq(Seq seq) {
return format("%s", seq);
}
string printableFunction(Obj func) {
return format("%s", func);
}
string atomAsString(Atom a) {
return printableValue(a.value);
}
int jumpInstruction(string message, int sign, Chunk chunk, int offset) {
uint jump = to!uint(chunk.code[offset + 1] << 8);
jump |= chunk.code[offset + 2];
writefln("%-16s %4d -> %d", message, offset, offset + 3 + sign * jump);
return offset + 3;
}
int byteInstruction(string message, Chunk chunk, int offset) {
ubyte slot = chunk.code[offset + 1];
writefln("%-16s %4d", message, slot);
return offset + 2;
}
int constantInstruction(string message, Chunk chunk, int offset) {
ubyte idx = chunk.code[offset + 1];
//writeln("dunno how to write a constant");
writefln("%-16s %4d '%s'", message, idx, printableValue(chunk.constants[idx]));
//writefln("%-16s %4d '%s'", message, idx, atomAsString(chunk.constants[idx]));
return offset + 2;
}
int listInstruction(string message, Chunk chunk, int offset) {
ubyte idx = chunk.code[offset + 1];
writefln("%-16s %4d", message, idx);
return offset + 2;
}
int simpleInstruction(string message, int offset) {
writeln(message);
return offset + 1;
}
void disassembleChunk(Chunk chunk, string name) {
writefln("== %s ==", name);
int cnt = 0;
while(true) {
if (cnt >= chunk.code.length) {
break;
}
cnt = disassemble(chunk, cnt);
}
}
int disassemble(Chunk chunk, int offset) {
writef("%04d %4d ", offset, chunk.lines[offset]);
ubyte inst = chunk.code[offset];
switch (inst) {
case OpCode.OP_IS_NIL:
return simpleInstruction("OP_IS_NIL", offset);
case OpCode.OP_DUPLICATE:
return simpleInstruction("OP_DUPLICATE", offset);
case OpCode.OP_DUPLICATE_2:
return simpleInstruction("OP_DUPLICATE_2", offset);
case OpCode.OP_ROTATE_N:
return simpleInstruction("OP_ROTATE_N", offset);
case OpCode.OP_ZERO:
return simpleInstruction("OP_ZERO", offset);
case OpCode.OP_INCREMENT:
return simpleInstruction("OP_INCREMENT", offset);
case OpCode.OP_LIST_N:
return simpleInstruction("OP_LIST_N", offset);
case OpCode.OP_DEF_LOCAL:
return byteInstruction("OP_DEF_LOCAL", chunk, offset);
case OpCode.OP_GET_LOCAL:
return byteInstruction("OP_GET_LOCAL", chunk, offset);
case OpCode.OP_SET_LOCAL:
return byteInstruction("OP_SET_LOCAL", chunk, offset);
case OpCode.OP_LIST:
return listInstruction("OP_LIST", chunk, offset);
case OpCode.OP_ADD:
return simpleInstruction("OP_ADD", offset);
case OpCode.OP_MULTIPLY:
return simpleInstruction("OP_MULTIPLY", offset);
case OpCode.OP_LESS:
return simpleInstruction("OP_LESS", offset);
case OpCode.OP_GREATER:
return simpleInstruction("OP_GREATER", offset);
case OpCode.OP_NOT:
return simpleInstruction("OP_NOT", offset);
case OpCode.OP_SUBTRACT:
return simpleInstruction("OP_SUBTRACT", offset);
case OpCode.OP_CONSTANT:
return constantInstruction("OP_CONSTANT", chunk, offset);
case OpCode.OP_DEF_GLOBAL:
return constantInstruction("OP_DEF_GLOBAL", chunk, offset);
case OpCode.OP_GET_GLOBAL:
return constantInstruction("OP_GET_GLOBAL", chunk, offset);
case OpCode.OP_NEGATE:
return simpleInstruction("OP_NEGATE", offset);
case OpCode.OP_POP:
return simpleInstruction("OP_POP", offset);
case OpCode.OP_POPB:
return simpleInstruction("OP_POPB", offset);
case OpCode.OP_POP_SCOPE:
return simpleInstruction("OP_POP_SCOPE", offset);
case OpCode.OP_RETURN:
return simpleInstruction("OP_RETURN", offset);
case OpCode.OP_NIL:
return simpleInstruction("OP_NIL", offset);
case OpCode.OP_JUMP:
return jumpInstruction("OP_JUMP", 1, chunk, offset);
case OpCode.OP_JUMP_TO:
return jumpInstruction("OP_JUMP_TO", -1, chunk, offset);
case OpCode.OP_JUMP_IF_FALSE:
return jumpInstruction("OP_JUMP_IF_FALSE", 1, chunk, offset);
case OpCode.OP_JUMP_IF_TRUE:
return jumpInstruction("OP_JUMP_IF_TRUE", 1, chunk, offset);
case OpCode.OP_CALL:
return byteInstruction("OP_CALL", chunk, offset);
case OpCode.OP_TYPE_CHECK_NUMBER:
return simpleInstruction("OP_TYPE_CHECK_NUMBER", offset);
case OpCode.OP_TYPE_CHECK_BOOLEAN:
return simpleInstruction("OP_TYPE_CHECK_BOOLEAN", offset);
case OpCode.OP_TYPE_CHECK_SEQ:
return simpleInstruction("OP_TYPE_CHECK_SEQ", offset);
case OpCode.OP_FIRST:
return simpleInstruction("OP_FIRST", offset);
case OpCode.OP_REST:
return simpleInstruction("OP_REST", offset);
default:
writeln("unknown opcode?");
return offset + 1;
}
return 0;
}
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