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Nasal-Interpreter
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⚡ split type definition from gc.h

This commit is contained in:
ValKmjolnir 2023-10-15 21:46:53 +08:00
parent 8290b7df9f
commit aab7decd70
20 changed files with 699 additions and 642 deletions
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1
CMakeLists.txt
View File

@ -36,6 +36,7 @@ set(NASAL_OBJECT_SOURCE_FILE
${CMAKE_SOURCE_DIR}/src/nasal_misc.cpp
${CMAKE_SOURCE_DIR}/src/nasal_opcode.cpp
${CMAKE_SOURCE_DIR}/src/nasal_parse.cpp
${CMAKE_SOURCE_DIR}/src/nasal_type.cpp
${CMAKE_SOURCE_DIR}/src/nasal_vm.cpp
${CMAKE_SOURCE_DIR}/src/optimizer.cpp
${CMAKE_SOURCE_DIR}/src/symbol_finder.cpp

8
makefile
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@ -23,6 +23,7 @@ NASAL_HEADER=\
src/nasal_opcode.h\
src/nasal_parse.h\
src/nasal_vm.h\
src/nasal_type.h\
src/nasal.h\
src/optimizer.h\
src/symbol_finder.h\
@ -57,6 +58,7 @@ NASAL_OBJECT=\
build/unix_lib.o\
build/dylib_lib.o\
build/coroutine.o\
build/nasal_type.o\
build/nasal_vm.o\
build/nasal_dbg.o\
build/repl.o\
@ -89,7 +91,10 @@ build/repl.o: $(NASAL_HEADER) src/repl.h src/repl.cpp | build
build/nasal_err.o: src/nasal.h src/repl.h src/nasal_err.h src/nasal_err.cpp | build
$(CXX) $(CXXFLAGS) src/nasal_err.cpp -o build/nasal_err.o
build/nasal_gc.o: src/nasal.h src/nasal_gc.h src/nasal_gc.cpp | build
build/nasal_type.o: src/nasal.h src/nasal_type.h src/nasal_type.cpp | build
$(CXX) $(CXXFLAGS) src/nasal_type.cpp -o build/nasal_type.o
build/nasal_gc.o: src/nasal.h src/nasal_type.h src/nasal_gc.h src/nasal_gc.cpp | build
$(CXX) $(CXXFLAGS) src/nasal_gc.cpp -o build/nasal_gc.o
build/nasal_import.o: \
@ -115,6 +120,7 @@ build/nasal_ast.o: \
build/nasal_builtin.o: \
src/nasal.h\
src/nasal_type.h\
src/nasal_gc.h\
src/nasal_builtin.h src/nasal_builtin.cpp | build
$(CXX) $(CXXFLAGS) src/nasal_builtin.cpp -o build/nasal_builtin.o

2
module/fib.cpp
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@ -2,6 +2,8 @@
#include <iostream>
#include "../src/nasal.h"
#include "../src/nasal_type.h"
#include "../src/nasal_gc.h"
namespace nasal {
namespace fib_module {

2
module/keyboard.cpp
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@ -1,4 +1,6 @@
#include "../src/nasal.h"
#include "../src/nasal_type.h"
#include "../src/nasal_gc.h"
#include <iostream>
#ifndef _MSC_VER

4
module/makefile
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@ -3,8 +3,8 @@
dynamic_libs_so = libfib.so libkey.so libnasock.so libmat.so
dynamic_libs_dll = libfib.dll libkey.dll libnasock.dll libmat.dll
used_header = ../src/nasal.h ../src/nasal_gc.h
used_object = ../build/nasal_misc.o ../build/nasal_gc.o
used_header = ../src/nasal.h ../src/nasal_type.h ../src/nasal_gc.h
used_object = ../build/nasal_misc.o ../build/nasal_type.o ../build/nasal_gc.o
STD = c++17

2
module/matrix.cpp
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@ -1,4 +1,6 @@
#include "../src/nasal.h"
#include "../src/nasal_type.h"
#include "../src/nasal_gc.h"
#include <cmath>
namespace nasal {

2
module/nasocket.cpp
View File

@ -1,4 +1,6 @@
#include "../src/nasal.h"
#include "../src/nasal_type.h"
#include "../src/nasal_gc.h"
#ifndef _MSC_VER
#include <unistd.h>

6
src/bits_lib.cpp
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@ -41,7 +41,7 @@ var builtin_fld(var* local, gc& ngc) {
var str = local[1];
var startbit = local[2];
var length = local[3];
if (str.type!=vm_str || str.val.gcobj->unmut) {
if (str.type!=vm_str || str.val.gcobj->unmutable) {
return nas_err("fld", "\"str\" must be mutable string");
}
if (startbit.type!=vm_num || length.type!=vm_num) {
@ -70,7 +70,7 @@ var builtin_sfld(var* local, gc& ngc) {
var str = local[1];
var startbit = local[2];
var length = local[3];
if (str.type!=vm_str || str.val.gcobj->unmut) {
if (str.type!=vm_str || str.val.gcobj->unmutable) {
return nas_err("sfld", "\"str\" must be mutable string");
}
if (startbit.type!=vm_num || length.type!=vm_num) {
@ -103,7 +103,7 @@ var builtin_setfld(var* local, gc& ngc) {
var startbit = local[2];
var length = local[3];
var value = local[4];
if (str.type!=vm_str || str.val.gcobj->unmut) {
if (str.type!=vm_str || str.val.gcobj->unmutable) {
return nas_err("setfld", "\"str\" must be mutable string");
}
if (startbit.type!=vm_num || length.type!=vm_num || value.type!=vm_num) {

6
src/io_lib.cpp
View File

@ -42,7 +42,7 @@ var builtin_exists(var* local, gc& ngc) {
if (local[1].type!=vm_str) {
return zero;
}
return access(local[1].str().c_str(), F_OK)!=-1?one:zero;
return access(local[1].str().c_str(), F_OK)!=-1? one:zero;
}
var builtin_open(var* local, gc& ngc) {
@ -79,7 +79,7 @@ var builtin_read(var* local, gc& ngc) {
if (!fd.objchk(file_type_name)) {
return nas_err("read", "not a valid filehandle");
}
if (buf.type!=vm_str || buf.val.gcobj->unmut) {
if (buf.type!=vm_str || buf.val.gcobj->unmutable) {
return nas_err("read", "\"buf\" must be mutable string");
}
if (len.type!=vm_num) {
@ -94,7 +94,7 @@ var builtin_read(var* local, gc& ngc) {
}
f64 res = fread(buff, 1, len.num(), static_cast<FILE*>(fd.obj().pointer));
buf.str() = buff;
buf.val.gcobj->unmut = true;
buf.val.gcobj->unmutable = true;
delete []buff;
return var::num(res);
}

6
src/io_lib.h
View File

@ -6,6 +6,12 @@
#include <sys/stat.h>
#ifndef _MSC_VER
#include <unistd.h>
#else
#include <io.h>
#endif
#ifdef _MSC_VER
#define F_OK 0 // fuck msc
#endif

2
src/main.cpp
View File

@ -1,4 +1,6 @@
#include "nasal.h"
#include "nasal_type.h"
#include "nasal_gc.h"
#include "nasal_err.h"
#include "nasal_lexer.h"
#include "nasal_ast.h"

2
src/math_lib.cpp
View File

@ -57,7 +57,7 @@ var builtin_atan2(var* local, gc& ngc) {
var builtin_isnan(var* local, gc& ngc) {
var x = local[1];
return (x.type==vm_num && std::isnan(x.num()))?one:zero;
return (x.type==vm_num && std::isnan(x.num()))? one:zero;
}
nasal_builtin_table math_lib_native[] = {

7
src/nasal.h
View File

@ -9,7 +9,6 @@
#include <fstream>
#include <cstring>
#include <cmath>
#include <vector>
// abbreviation of some useful basic type
using i32 = std::int32_t;
@ -54,8 +53,6 @@ f64 dec2f(const char*);
f64 str2num(const char*);
i32 utf8_hdchk(const char);
std::string chrhex(const char);
std::string rawstr(const std::string&, const usize maxlen=0);
std::string rawstr(const std::string&, const usize maxlen = 0);
}
#include "nasal_gc.h"
}

5
src/nasal_builtin.h
View File

@ -1,8 +1,13 @@
#pragma once
#include "nasal.h"
#include "nasal_type.h"
#include "nasal_gc.h"
#ifdef _WIN32
#include <windows.h>
#endif
#ifdef _MSC_VER
#pragma warning (disable:4566) // i know i'm using utf-8, fuck you
#pragma warning (disable:4244)

351
src/nasal_gc.cpp
View File

@ -2,348 +2,6 @@
namespace nasal {
var nas_vec::get_val(const i32 n) {
i32 size = elems.size();
if (n<-size || n>=size) {
return var::none();
}
return elems[n>=0? n:n+size];
}
var* nas_vec::get_mem(const i32 n) {
i32 size = elems.size();
if (n<-size || n>=size) {
return nullptr;
}
return &elems[n>=0? n:n+size];
}
std::ostream& operator<<(std::ostream& out, nas_vec& vec) {
if (!vec.elems.size() || vec.printed) {
out << (vec.elems.size()? "[..]":"[]");
return out;
}
vec.printed = true;
usize iter = 0, size = vec.elems.size();
out << "[";
for(auto& i:vec.elems) {
out << i << ",]"[(++iter)==size];
}
vec.printed = false;
return out;
}
var nas_hash::get_val(const std::string& key) {
if (elems.count(key)) {
return elems.at(key);
} else if (!elems.count("parents")) {
return var::none();
}
var ret = var::none();
var val = elems.at("parents");
if (val.type!=vm_vec) {
return ret;
}
for(auto& i : val.vec().elems) {
if (i.type==vm_hash) {
ret = i.hash().get_val(key);
}
if (ret.type!=vm_none) {
return ret;
}
}
return ret;
}
var* nas_hash::get_mem(const std::string& key) {
if (elems.count(key)) {
return &elems.at(key);
} else if (!elems.count("parents")) {
return nullptr;
}
var* addr = nullptr;
var val = elems.at("parents");
if (val.type!=vm_vec) {
return addr;
}
for(auto& i : val.vec().elems) {
if (i.type==vm_hash) {
addr = i.hash().get_mem(key);
}
if (addr) {
return addr;
}
}
return addr;
}
std::ostream& operator<<(std::ostream& out, nas_hash& hash) {
if (!hash.elems.size() || hash.printed) {
out << (hash.elems.size()? "{..}":"{}");
return out;
}
hash.printed = true;
usize iter = 0, size = hash.elems.size();
out << "{";
for(auto& i : hash.elems) {
out << i.first << ":" << i.second << ",}"[(++iter)==size];
}
hash.printed = false;
return out;
}
void nas_func::clear() {
dynamic_parameter_index = -1;
local.clear();
upval.clear();
keys.clear();
}
void nas_ghost::set(
const std::string& ghost_type_name,
destructor destructor_pointer,
void* ghost_pointer) {
type_name = ghost_type_name;
destructor_function = destructor_pointer;
pointer = ghost_pointer;
}
void nas_ghost::clear() {
// do nothing if pointer is null
if (!pointer) {
return;
}
// do clear pointer if destructor function pointer is null
if (!destructor_function) {
type_name = "";
pointer = nullptr;
return;
}
// do destruction
destructor_function(pointer);
type_name = "";
pointer = nullptr;
destructor_function = nullptr;
}
std::ostream& operator<<(std::ostream& out, const nas_ghost& ghost) {
out << "<object " << ghost.get_ghost_name();
out << " at 0x" << std::hex;
out << reinterpret_cast<u64>(ghost.pointer) << std::dec << ">";
return out;
}
void nas_co::clear() {
if (!ctx.stack) {
return;
}
for(u32 i = 0; i<STACK_DEPTH; ++i) {
ctx.stack[i] = var::nil();
}
ctx.pc = 0;
ctx.localr = nullptr;
ctx.memr = nullptr;
ctx.canary = ctx.stack+STACK_DEPTH-1;
ctx.top = ctx.stack;
ctx.funcr = var::nil();
ctx.upvalr = var::nil();
status = status::suspended;
}
std::ostream& operator<<(std::ostream& out, const nas_co& co) {
out << "<coroutine at 0x" << std::hex;
out << reinterpret_cast<u64>(&co) << std::dec << ">";
return out;
}
var nas_map::get_val(const std::string& key) {
if (mapper.count(key)) {
return *mapper.at(key);
}
return var::none();
}
var* nas_map::get_mem(const std::string& key) {
if (mapper.count(key)) {
return mapper.at(key);
}
return nullptr;
}
std::ostream& operator<<(std::ostream& out, nas_map& mp) {
if (!mp.mapper.size() || mp.printed) {
out << (mp.mapper.size()? "{..}":"{}");
return out;
}
mp.printed = true;
usize iter = 0, size = mp.mapper.size();
out << "{";
for(auto& i : mp.mapper) {
out << i.first << ":" << *i.second << ",}"[(++iter)==size];
}
mp.printed = false;
return out;
}
nas_val::nas_val(u8 val_type) {
mark = gc_status::collected;
type = val_type;
unmut = 0;
switch(val_type) {
case vm_str: ptr.str = new std::string; break;
case vm_vec: ptr.vec = new nas_vec; break;
case vm_hash: ptr.hash = new nas_hash; break;
case vm_func: ptr.func = new nas_func; break;
case vm_upval: ptr.upval = new nas_upval; break;
case vm_obj: ptr.obj = new nas_ghost; break;
case vm_co: ptr.co = new nas_co; break;
case vm_map: ptr.map = new nas_map; break;
}
}
nas_val::~nas_val() {
switch(type) {
case vm_str: delete ptr.str; break;
case vm_vec: delete ptr.vec; break;
case vm_hash: delete ptr.hash; break;
case vm_func: delete ptr.func; break;
case vm_upval:delete ptr.upval;break;
case vm_obj: delete ptr.obj; break;
case vm_co: delete ptr.co; break;
case vm_map: delete ptr.map; break;
}
type=vm_nil;
}
void nas_val::clear() {
switch(type) {
case vm_str: ptr.str->clear(); break;
case vm_vec: ptr.vec->elems.clear(); break;
case vm_hash: ptr.hash->elems.clear();break;
case vm_func: ptr.func->clear(); break;
case vm_upval:ptr.upval->clear(); break;
case vm_obj: ptr.obj->clear(); break;
case vm_co: ptr.co->clear(); break;
case vm_map: ptr.map->clear(); break;
}
}
f64 var::tonum() {
return type!=vm_str? val.num:str2num(str().c_str());
}
std::string var::tostr() {
if (type==vm_str) {
return str();
} else if (type==vm_num) {
std::string tmp=std::to_string(num());
tmp.erase(tmp.find_last_not_of('0')+1, std::string::npos);
tmp.erase(tmp.find_last_not_of('.')+1, std::string::npos);
return tmp;
}
return "";
}
std::ostream& operator<<(std::ostream& out, var& ref) {
switch(ref.type) {
case vm_none: out << "undefined"; break;
case vm_nil: out << "nil"; break;
case vm_num: out << ref.val.num; break;
case vm_str: out << ref.str(); break;
case vm_vec: out << ref.vec(); break;
case vm_hash: out << ref.hash(); break;
case vm_func: out << "func(..) {..}"; break;
case vm_obj: out << ref.obj(); break;
case vm_co: out << ref.co(); break;
case vm_map: out << ref.map(); break;
}
return out;
}
bool var::objchk(const std::string& name) {
return type==vm_obj && obj().type_name==name && obj().pointer;
}
var var::none() {
return {vm_none, static_cast<u32>(0)};
}
var var::nil() {
return {vm_nil, static_cast<u32>(0)};
}
var var::ret(u32 pc) {
return {vm_ret, pc};
}
var var::cnt(i64 n) {
return {vm_cnt, n};
}
var var::num(f64 n) {
return {vm_num, n};
}
var var::gcobj(nas_val* p) {
return {p->type, p};
}
var var::addr(var* p) {
return {vm_addr, p};
}
var* var::addr() {
return val.addr;
}
u32 var::ret() {
return val.ret;
}
i64& var::cnt() {
return val.cnt;
}
f64 var::num() {
return val.num;
}
std::string& var::str() {
return *val.gcobj->ptr.str;
}
nas_vec& var::vec() {
return *val.gcobj->ptr.vec;
}
nas_hash& var::hash() {
return *val.gcobj->ptr.hash;
}
nas_func& var::func() {
return *val.gcobj->ptr.func;
}
nas_upval& var::upval() {
return *val.gcobj->ptr.upval;
}
nas_ghost& var::obj() {
return *val.gcobj->ptr.obj;
}
nas_co& var::co() {
return *val.gcobj->ptr.co;
}
nas_map& var::map() {
return *val.gcobj->ptr.map;
}
void gc::do_mark_sweep() {
using clk = std::chrono::high_resolution_clock;
auto begin = clk::now();
@ -556,7 +214,7 @@ void gc::init(
continue;
}
strs[i] = var::gcobj(new nas_val(vm_str));
strs[i].val.gcobj->unmut = 1;
strs[i].val.gcobj->unmutable = 1;
strs[i].str() = constant_strings[i];
}
@ -568,7 +226,7 @@ void gc::init(
continue;
}
env_argv[i] = var::gcobj(new nas_val(vm_str));
env_argv[i].val.gcobj->unmut = 1;
env_argv[i].val.gcobj->unmutable = 1;
env_argv[i].str() = argv[i];
}
}
@ -724,9 +382,4 @@ void gc::ctxreserve() {
cort = nullptr;
}
var nas_err(const std::string& error_function_name, const std::string& info) {
std::cerr << "[vm] " << error_function_name << ": " << info << "\n";
return var::none();
}
}

277
src/nasal_gc.h
View File

@ -7,288 +7,18 @@
#pragma warning (disable:4102)
#endif
#ifndef _MSC_VER
#include <unistd.h>
#include <dirent.h>
#else
#include <io.h>
#include <direct.h>
#endif
#ifdef _WIN32
#include <windows.h>
#else
#include <dlfcn.h>
#endif
#include <iomanip>
#include <vector>
#include <unordered_map>
#include <chrono>
#include <algorithm>
#include <thread>
#include <cstring>
#include <sstream>
#include "nasal.h"
#include "nasal_type.h"
namespace nasal {
enum vm_type:u8 {
/* none-gc object */
vm_none = 0,
vm_cnt,
vm_addr,
vm_ret,
vm_nil,
vm_num,
/* gc object */
vm_str,
vm_vec,
vm_hash,
vm_func,
vm_upval,
vm_obj,
vm_co,
vm_map // for globals and namespaces
};
const u32 gc_type_size = vm_map-vm_str+1;
struct nas_vec; // vector
struct nas_hash; // hashmap(dict)
struct nas_func; // function(lambda)
struct nas_upval; // upvalue
struct nas_ghost; // objects
struct nas_co; // coroutine
struct nas_map; // mapper
struct nas_val; // nas_val includes gc-managed types
struct var {
public:
u8 type = vm_none;
union {
u32 ret;
i64 cnt;
f64 num;
var* addr;
nas_val* gcobj;
} val;
private:
var(u8 t, u32 pc) {type = t; val.ret = pc;}
var(u8 t, i64 ct) {type = t; val.cnt = ct;}
var(u8 t, f64 n) {type = t; val.num = n;}
var(u8 t, var* p) {type = t; val.addr = p;}
var(u8 t, nas_val* p) {type = t; val.gcobj = p;}
public:
var() = default;
var(const var&) = default;
bool operator==(const var& nr) const {
return type==nr.type && val.gcobj==nr.val.gcobj;
}
bool operator!=(const var& nr) const {
return type!=nr.type || val.gcobj!=nr.val.gcobj;
}
// number and string can be translated to each other
f64 tonum();
std::string tostr();
bool objchk(const std::string&);
// create new var object
static var none();
static var nil();
static var ret(u32);
static var cnt(i64);
static var num(f64);
static var gcobj(nas_val*);
static var addr(var*);
// get content
var* addr();
u32 ret();
i64& cnt();
f64 num();
std::string& str();
nas_vec& vec();
nas_hash& hash();
nas_func& func();
nas_upval& upval();
nas_ghost& obj();
nas_co& co();
nas_map& map();
};
struct nas_vec {
std::vector<var> elems;
// mark if this is printed, avoid stackoverflow
bool printed;
nas_vec():printed(false) {}
usize size() const {return elems.size();}
var get_val(const i32);
var* get_mem(const i32);
};
struct nas_hash {
std::unordered_map<std::string, var> elems;
// mark if this is printed, avoid stackoverflow
bool printed;
nas_hash(): printed(false) {}
usize size() const {return elems.size();}
var get_val(const std::string&);
var* get_mem(const std::string&);
};
struct nas_func {
i32 dynamic_parameter_index; // dynamic parameter name index in hash.
u32 entry; // pc will set to entry-1 to call this function
u32 parameter_size; // used to load default parameters to a new function
u32 local_size; // used to expand memory space for local values on stack
std::vector<var> local; // local scope with default value(var)
std::vector<var> upval; // closure
// parameter table, u32 begins from 1
std::unordered_map<std::string, u32> keys;
nas_func():
dynamic_parameter_index(-1), entry(0),
parameter_size(0), local_size(0) {}
void clear();
};
struct nas_upval {
public:
/* on stack, use these variables */
bool on_stack;
u32 size;
var* stk;
/* not on stack, use this */
std::vector<var> elems;
public:
nas_upval(): on_stack(true), size(0), stk(nullptr) {}
var& operator[](usize n) {
return on_stack? stk[n]:elems[n];
}
void clear() {
on_stack = true;
elems.clear();
size = 0;
}
};
struct nas_ghost {
private:
using destructor = void (*)(void*);
public:
std::string type_name;
destructor destructor_function;
void* pointer;
public:
nas_ghost():
type_name(""), destructor_function(nullptr), pointer(nullptr) {}
~nas_ghost() {clear();}
void set(const std::string&, destructor, void*);
void clear();
public:
const std::string& get_ghost_name() const {
return type_name;
}
};
struct context {
u32 pc = 0;
var* localr = nullptr;
var* memr = nullptr;
var funcr = var::nil();
var upvalr = var::nil();
var* canary = nullptr;
var* stack = nullptr;
var* top = nullptr;
};
struct nas_co {
enum class status:u32 {
suspended,
running,
dead
};
context ctx;
status status;
nas_co() {
ctx.stack = new var[STACK_DEPTH];
clear();
}
~nas_co() {
delete[] ctx.stack;
}
void clear();
};
struct nas_map {
bool printed = false;
std::unordered_map<std::string, var*> mapper;
nas_map() {}
void clear() {
mapper.clear();
}
var get_val(const std::string&);
var* get_mem(const std::string&);
};
struct nas_val {
enum class gc_status:u8 {
uncollected = 0,
collected,
found
};
gc_status mark;
u8 type; // value type
u8 unmut; // used to mark if a string is unmutable
union {
std::string* str;
nas_vec* vec;
nas_hash* hash;
nas_func* func;
nas_upval* upval;
nas_ghost* obj;
nas_co* co;
nas_map* map;
} ptr;
nas_val(u8);
~nas_val();
void clear();
};
std::ostream& operator<<(std::ostream&, nas_vec&);
std::ostream& operator<<(std::ostream&, nas_hash&);
std::ostream& operator<<(std::ostream&, nas_map&);
std::ostream& operator<<(std::ostream&, const nas_ghost&);
std::ostream& operator<<(std::ostream&, const nas_co&);
std::ostream& operator<<(std::ostream&, var&);
const var zero = var::num(0);
const var one = var::num(1);
const var nil = var::nil();
struct gc {
/* main context temporary storage */
context main_context;
@ -370,7 +100,7 @@ public:
var newstr(const char* buff) {
var s = alloc(vm_str);
s.str() = buff;
s.str() = std::string(buff);
return s;
}
@ -381,9 +111,6 @@ public:
}
};
// use to print error log and return error value
var nas_err(const std::string&, const std::string&);
// module function type
typedef var (*module_func)(var*, usize, gc*);

352
src/nasal_type.cpp Normal file
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@ -0,0 +1,352 @@
#include "nasal_type.h"
namespace nasal {
var nas_vec::get_val(const i32 n) {
i32 size = elems.size();
if (n<-size || n>=size) {
return var::none();
}
return elems[n>=0? n:n+size];
}
var* nas_vec::get_mem(const i32 n) {
i32 size = elems.size();
if (n<-size || n>=size) {
return nullptr;
}
return &elems[n>=0? n:n+size];
}
std::ostream& operator<<(std::ostream& out, nas_vec& vec) {
if (!vec.elems.size() || vec.printed) {
out << (vec.elems.size()? "[..]":"[]");
return out;
}
vec.printed = true;
usize iter = 0, size = vec.elems.size();
out << "[";
for(auto& i:vec.elems) {
out << i << ",]"[(++iter)==size];
}
vec.printed = false;
return out;
}
var nas_hash::get_val(const std::string& key) {
if (elems.count(key)) {
return elems.at(key);
} else if (!elems.count("parents")) {
return var::none();
}
var ret = var::none();
var val = elems.at("parents");
if (val.type!=vm_vec) {
return ret;
}
for(auto& i : val.vec().elems) {
if (i.type==vm_hash) {
ret = i.hash().get_val(key);
}
if (ret.type!=vm_none) {
return ret;
}
}
return ret;
}
var* nas_hash::get_mem(const std::string& key) {
if (elems.count(key)) {
return &elems.at(key);
} else if (!elems.count("parents")) {
return nullptr;
}
var* addr = nullptr;
var val = elems.at("parents");
if (val.type!=vm_vec) {
return addr;
}
for(auto& i : val.vec().elems) {
if (i.type==vm_hash) {
addr = i.hash().get_mem(key);
}
if (addr) {
return addr;
}
}
return addr;
}
std::ostream& operator<<(std::ostream& out, nas_hash& hash) {
if (!hash.elems.size() || hash.printed) {
out << (hash.elems.size()? "{..}":"{}");
return out;
}
hash.printed = true;
usize iter = 0, size = hash.elems.size();
out << "{";
for(auto& i : hash.elems) {
out << i.first << ":" << i.second << ",}"[(++iter)==size];
}
hash.printed = false;
return out;
}
void nas_func::clear() {
dynamic_parameter_index = -1;
local.clear();
upval.clear();
keys.clear();
}
void nas_ghost::set(
const std::string& ghost_type_name,
destructor destructor_pointer,
void* ghost_pointer) {
type_name = ghost_type_name;
destructor_function = destructor_pointer;
pointer = ghost_pointer;
}
void nas_ghost::clear() {
// do nothing if pointer is null
if (!pointer) {
return;
}
// do clear pointer if destructor function pointer is null
if (!destructor_function) {
type_name = "";
pointer = nullptr;
return;
}
// do destruction
destructor_function(pointer);
type_name = "";
pointer = nullptr;
destructor_function = nullptr;
}
std::ostream& operator<<(std::ostream& out, const nas_ghost& ghost) {
out << "<object " << ghost.get_ghost_name();
out << " at 0x" << std::hex;
out << reinterpret_cast<u64>(ghost.pointer) << std::dec << ">";
return out;
}
void nas_co::clear() {
if (!ctx.stack) {
return;
}
for(u32 i = 0; i<STACK_DEPTH; ++i) {
ctx.stack[i] = var::nil();
}
ctx.pc = 0;
ctx.localr = nullptr;
ctx.memr = nullptr;
ctx.canary = ctx.stack+STACK_DEPTH-1;
ctx.top = ctx.stack;
ctx.funcr = var::nil();
ctx.upvalr = var::nil();
status = status::suspended;
}
std::ostream& operator<<(std::ostream& out, const nas_co& co) {
out << "<coroutine at 0x" << std::hex;
out << reinterpret_cast<u64>(&co) << std::dec << ">";
return out;
}
var nas_map::get_val(const std::string& key) {
if (mapper.count(key)) {
return *mapper.at(key);
}
return var::none();
}
var* nas_map::get_mem(const std::string& key) {
if (mapper.count(key)) {
return mapper.at(key);
}
return nullptr;
}
std::ostream& operator<<(std::ostream& out, nas_map& mp) {
if (!mp.mapper.size() || mp.printed) {
out << (mp.mapper.size()? "{..}":"{}");
return out;
}
mp.printed = true;
usize iter = 0, size = mp.mapper.size();
out << "{";
for(auto& i : mp.mapper) {
out << i.first << ":" << *i.second << ",}"[(++iter)==size];
}
mp.printed = false;
return out;
}
nas_val::nas_val(u8 val_type) {
mark = gc_status::collected;
type = val_type;
unmutable = 0;
switch(val_type) {
case vm_str: ptr.str = new std::string; break;
case vm_vec: ptr.vec = new nas_vec; break;
case vm_hash: ptr.hash = new nas_hash; break;
case vm_func: ptr.func = new nas_func; break;
case vm_upval: ptr.upval = new nas_upval; break;
case vm_obj: ptr.obj = new nas_ghost; break;
case vm_co: ptr.co = new nas_co; break;
case vm_map: ptr.map = new nas_map; break;
}
}
nas_val::~nas_val() {
switch(type) {
case vm_str: delete ptr.str; break;
case vm_vec: delete ptr.vec; break;
case vm_hash: delete ptr.hash; break;
case vm_func: delete ptr.func; break;
case vm_upval:delete ptr.upval;break;
case vm_obj: delete ptr.obj; break;
case vm_co: delete ptr.co; break;
case vm_map: delete ptr.map; break;
}
type=vm_nil;
}
void nas_val::clear() {
switch(type) {
case vm_str: ptr.str->clear(); break;
case vm_vec: ptr.vec->elems.clear(); break;
case vm_hash: ptr.hash->elems.clear();break;
case vm_func: ptr.func->clear(); break;
case vm_upval:ptr.upval->clear(); break;
case vm_obj: ptr.obj->clear(); break;
case vm_co: ptr.co->clear(); break;
case vm_map: ptr.map->clear(); break;
}
}
f64 var::tonum() {
return type!=vm_str? val.num:str2num(str().c_str());
}
std::string var::tostr() {
if (type==vm_str) {
return str();
} else if (type==vm_num) {
std::string tmp=std::to_string(num());
tmp.erase(tmp.find_last_not_of('0')+1, std::string::npos);
tmp.erase(tmp.find_last_not_of('.')+1, std::string::npos);
return tmp;
}
return "";
}
std::ostream& operator<<(std::ostream& out, var& ref) {
switch(ref.type) {
case vm_none: out << "undefined"; break;
case vm_nil: out << "nil"; break;
case vm_num: out << ref.val.num; break;
case vm_str: out << ref.str(); break;
case vm_vec: out << ref.vec(); break;
case vm_hash: out << ref.hash(); break;
case vm_func: out << "func(..) {..}"; break;
case vm_obj: out << ref.obj(); break;
case vm_co: out << ref.co(); break;
case vm_map: out << ref.map(); break;
}
return out;
}
bool var::objchk(const std::string& name) {
return type==vm_obj && obj().type_name==name && obj().pointer;
}
var var::none() {
return {vm_none, static_cast<u32>(0)};
}
var var::nil() {
return {vm_nil, static_cast<u32>(0)};
}
var var::ret(u32 pc) {
return {vm_ret, pc};
}
var var::cnt(i64 n) {
return {vm_cnt, n};
}
var var::num(f64 n) {
return {vm_num, n};
}
var var::gcobj(nas_val* p) {
return {p->type, p};
}
var var::addr(var* p) {
return {vm_addr, p};
}
var* var::addr() {
return val.addr;
}
u32 var::ret() {
return val.ret;
}
i64& var::cnt() {
return val.cnt;
}
f64 var::num() {
return val.num;
}
std::string& var::str() {
return *val.gcobj->ptr.str;
}
nas_vec& var::vec() {
return *val.gcobj->ptr.vec;
}
nas_hash& var::hash() {
return *val.gcobj->ptr.hash;
}
nas_func& var::func() {
return *val.gcobj->ptr.func;
}
nas_upval& var::upval() {
return *val.gcobj->ptr.upval;
}
nas_ghost& var::obj() {
return *val.gcobj->ptr.obj;
}
nas_co& var::co() {
return *val.gcobj->ptr.co;
}
nas_map& var::map() {
return *val.gcobj->ptr.map;
}
var nas_err(const std::string& error_function_name, const std::string& info) {
std::cerr << "[vm] " << error_function_name << ": " << info << "\n";
return var::none();
}
}

272
src/nasal_type.h Normal file
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@ -0,0 +1,272 @@
#pragma once
#include "nasal.h"
#include <vector>
#include <unordered_map>
namespace nasal {
enum vm_type:u8 {
/* none-gc object */
vm_none = 0, // error type
vm_cnt, // counter for forindex/foreach loop
vm_addr, // var* address
vm_ret, // return addres(program counter)
vm_nil, // nil
vm_num, // number
/* gc object */
vm_str, // string
vm_vec, // vector
vm_hash, // hashmap(dict)
vm_func, // function(lambda)
vm_upval, // upvalue
vm_obj, // ghost type
vm_co, // coroutine
vm_map // for globals and namespaces
};
// size of gc object type
const u32 gc_type_size = vm_map-vm_str+1;
// basic types
struct nas_vec; // vector
struct nas_hash; // hashmap(dict)
struct nas_func; // function(lambda)
struct nas_upval; // upvalue
struct nas_ghost; // objects
struct nas_co; // coroutine
struct nas_map; // mapper
// union type
struct nas_val; // nas_val includes gc-managed types
struct var {
public:
u8 type = vm_none;
union {
u32 ret;
i64 cnt;
f64 num;
var* addr;
nas_val* gcobj;
} val;
private:
var(u8 t, u32 pc) {type = t; val.ret = pc;}
var(u8 t, i64 ct) {type = t; val.cnt = ct;}
var(u8 t, f64 n) {type = t; val.num = n;}
var(u8 t, var* p) {type = t; val.addr = p;}
var(u8 t, nas_val* p) {type = t; val.gcobj = p;}
public:
var() = default;
var(const var&) = default;
bool operator==(const var& nr) const {
return type==nr.type && val.gcobj==nr.val.gcobj;
}
bool operator!=(const var& nr) const {
return type!=nr.type || val.gcobj!=nr.val.gcobj;
}
// number and string can be translated to each other
f64 tonum();
std::string tostr();
bool objchk(const std::string&);
// create new var object
static var none();
static var nil();
static var ret(u32);
static var cnt(i64);
static var num(f64);
static var gcobj(nas_val*);
static var addr(var*);
// get value
var* addr();
u32 ret();
i64& cnt();
f64 num();
std::string& str();
nas_vec& vec();
nas_hash& hash();
nas_func& func();
nas_upval& upval();
nas_ghost& obj();
nas_co& co();
nas_map& map();
};
struct nas_vec {
std::vector<var> elems;
// mark if this is printed, avoid stackoverflow
bool printed;
nas_vec():printed(false) {}
usize size() const {return elems.size();}
var get_val(const i32);
var* get_mem(const i32);
};
struct nas_hash {
std::unordered_map<std::string, var> elems;
// mark if this is printed, avoid stackoverflow
bool printed;
nas_hash(): printed(false) {}
usize size() const {return elems.size();}
var get_val(const std::string&);
var* get_mem(const std::string&);
};
struct nas_func {
i32 dynamic_parameter_index; // dynamic parameter name index in hash.
u32 entry; // pc will set to entry-1 to call this function
u32 parameter_size; // used to load default parameters to a new function
u32 local_size; // used to expand memory space for local values on stack
std::vector<var> local; // local scope with default value(var)
std::vector<var> upval; // closure
// parameter table, u32 begins from 1
std::unordered_map<std::string, u32> keys;
nas_func():
dynamic_parameter_index(-1), entry(0),
parameter_size(0), local_size(0) {}
void clear();
};
struct nas_upval {
public:
/* on stack, use these variables */
bool on_stack;
u32 size;
var* stack_frame_offset;
/* not on stack, use this */
std::vector<var> elems;
public:
nas_upval(): on_stack(true), size(0), stack_frame_offset(nullptr) {}
var& operator[](usize n) {
return on_stack? stack_frame_offset[n]:elems[n];
}
void clear() {
on_stack = true;
elems.clear();
size = 0;
}
};
struct nas_ghost {
private:
using destructor = void (*)(void*);
public:
std::string type_name;
destructor destructor_function;
void* pointer;
public:
nas_ghost():
type_name(""), destructor_function(nullptr), pointer(nullptr) {}
~nas_ghost() {clear();}
void set(const std::string&, destructor, void*);
void clear();
public:
const std::string& get_ghost_name() const {
return type_name;
}
};
struct context {
u32 pc = 0;
var* localr = nullptr;
var* memr = nullptr;
var funcr = var::nil();
var upvalr = var::nil();
var* canary = nullptr;
var* stack = nullptr;
var* top = nullptr;
};
struct nas_co {
enum class status:u32 {
suspended,
running,
dead
};
context ctx;
status status;
nas_co() {
ctx.stack = new var[STACK_DEPTH];
clear();
}
~nas_co() {
delete[] ctx.stack;
}
void clear();
};
struct nas_map {
bool printed = false;
std::unordered_map<std::string, var*> mapper;
nas_map() {}
void clear() {
mapper.clear();
}
var get_val(const std::string&);
var* get_mem(const std::string&);
};
struct nas_val {
enum class gc_status:u8 {
uncollected = 0,
collected,
found
};
gc_status mark;
u8 type; // value type
u8 unmutable; // used to mark if a string is unmutable
union {
std::string* str;
nas_vec* vec;
nas_hash* hash;
nas_func* func;
nas_upval* upval;
nas_ghost* obj;
nas_co* co;
nas_map* map;
} ptr;
nas_val(u8);
~nas_val();
void clear();
};
std::ostream& operator<<(std::ostream&, nas_vec&);
std::ostream& operator<<(std::ostream&, nas_hash&);
std::ostream& operator<<(std::ostream&, nas_map&);
std::ostream& operator<<(std::ostream&, const nas_ghost&);
std::ostream& operator<<(std::ostream&, const nas_co&);
std::ostream& operator<<(std::ostream&, var&);
const var zero = var::num(0);
const var one = var::num(1);
const var nil = var::nil();
// use to print error log and return error value
var nas_err(const std::string&, const std::string&);
}

6
src/nasal_vm.h
View File

@ -262,7 +262,7 @@ inline void vm::o_newf() {
// so this size & stk setting has no problem
var upval = (ctx.upvalr.type==vm_nil)? ngc.alloc(vm_upval):ctx.upvalr;
upval.upval().size = ctx.funcr.func().local_size;
upval.upval().stk = ctx.localr;
upval.upval().stack_frame_offset = ctx.localr;
func.upval.push_back(upval);
ctx.upvalr = upval;
}
@ -507,7 +507,7 @@ inline void vm::o_neq() {
#define op_cmp(type)\
--ctx.top;\
ctx.top[0] = (ctx.top[0].tonum() type ctx.top[1].tonum())?one:zero;
ctx.top[0] = (ctx.top[0].tonum() type ctx.top[1].tonum())? one:zero;
inline void vm::o_less() {op_cmp(<);}
inline void vm::o_leq() {op_cmp(<=);}
@ -515,7 +515,7 @@ inline void vm::o_grt() {op_cmp(>);}
inline void vm::o_geq() {op_cmp(>=);}
#define op_cmp_const(type)\
ctx.top[0] = (ctx.top[0].tonum() type cnum[imm[ctx.pc]])?one:zero;
ctx.top[0] = (ctx.top[0].tonum() type cnum[imm[ctx.pc]])? one:zero;
inline void vm::o_lessc() {op_cmp_const(<);}
inline void vm::o_leqc() {op_cmp_const(<=);}

28
tools/file2ppm.nas Normal file
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@ -0,0 +1,28 @@
var ppm = func(filename, buffer) {
# P3 use ASCII number
# P6 use binary character
var width = 256;
var height = int(size(buffer)/3/width); # ppm use 3 chars for one pixel
println("width ", width, ", height ", height);
var fd = io.open(filename, "wb");
io.write(fd, "P6\n"~width~" "~height~"\n255\n");
io.write(fd, buffer);
io.close(fd);
}
if (size(arg)<1) {
println("need input file and output file");
exit(-1);
}
var content = io.readfile(arg[0], "r");
var tail_len = 0;
while(math.mod(size(content), 256*3)!=0) {
content ~= "A";
tail_len += 1;
}
println("filled ", tail_len);
println("size ", size(content));
ppm(size(arg)==2? arg[1]:"out.ppm", content);