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pocketpy/src/cffi.cpp
blueloveTH 656d1d7291 ...
2023-07-02 03:52:44 +08:00

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#include "pocketpy/cffi.h"
namespace pkpy{
void VoidP::_register(VM* vm, PyObject* mod, PyObject* type){
vm->bind_default_constructor<VoidP>(type);
vm->bind_func<1>(type, "from_hex", [](VM* vm, ArgsView args){
std::string s = CAST(Str&, args[0]).str();
size_t size;
intptr_t ptr = std::stoll(s, &size, 16);
if(size != s.size()) vm->ValueError("invalid literal for void_p(): " + s);
return VAR_T(VoidP, (void*)ptr);
});
vm->bind_method<0>(type, "hex", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
return VAR(self.hex());
});
vm->bind__repr__(PK_OBJ_GET(Type, type), [](VM* vm, PyObject* obj){
VoidP& self = _CAST(VoidP&, obj);
std::stringstream ss;
ss << "<void* at " << self.hex();
if(self.base_offset != 1) ss << ", base_offset=" << self.base_offset;
ss << ">";
return VAR(ss.str());
});
#define BIND_CMP(name, op) \
vm->bind##name(PK_OBJ_GET(Type, type), [](VM* vm, PyObject* lhs, PyObject* rhs){ \
if(!is_non_tagged_type(rhs, VoidP::_type(vm))) return vm->NotImplemented; \
return VAR(_CAST(VoidP&, lhs) op _CAST(VoidP&, rhs)); \
});
BIND_CMP(__eq__, ==)
BIND_CMP(__lt__, <)
BIND_CMP(__le__, <=)
BIND_CMP(__gt__, >)
BIND_CMP(__ge__, >=)
#undef BIND_CMP
vm->bind__hash__(PK_OBJ_GET(Type, type), [](VM* vm, PyObject* obj){
VoidP& self = _CAST(VoidP&, obj);
return reinterpret_cast<i64>(self.ptr);
});
vm->bind_method<1>(type, "set_base_offset", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
if(is_non_tagged_type(args[1], vm->tp_str)){
const Str& type = _CAST(Str&, args[1]);
self.base_offset = c99_sizeof(vm, type);
}else{
self.base_offset = CAST(int, args[1]);
}
return vm->None;
});
vm->bind_method<0>(type, "get_base_offset", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
return VAR(self.base_offset);
});
vm->bind_method<1>(type, "offset", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
i64 offset = CAST(i64, args[1]);
return VAR_T(VoidP, (char*)self.ptr + offset * self.base_offset);
});
vm->bind__add__(PK_OBJ_GET(Type, type), [](VM* vm, PyObject* lhs, PyObject* rhs){
VoidP& self = _CAST(VoidP&, lhs);
i64 offset = CAST(i64, rhs);
return VAR_T(VoidP, (char*)self.ptr + offset);
});
vm->bind__sub__(PK_OBJ_GET(Type, type), [](VM* vm, PyObject* lhs, PyObject* rhs){
VoidP& self = _CAST(VoidP&, lhs);
i64 offset = CAST(i64, rhs);
return VAR_T(VoidP, (char*)self.ptr - offset);
});
#define BIND_SETGET(T, name) \
vm->bind_method<0>(type, "read_" name, [](VM* vm, ArgsView args){ \
VoidP& self = _CAST(VoidP&, args[0]); \
return VAR(*(T*)self.ptr); \
}); \
vm->bind_method<1>(type, "write_" name, [](VM* vm, ArgsView args){ \
VoidP& self = _CAST(VoidP&, args[0]); \
*(T*)self.ptr = CAST(T, args[1]); \
return vm->None; \
});
BIND_SETGET(char, "char")
BIND_SETGET(unsigned char, "uchar")
BIND_SETGET(short, "short")
BIND_SETGET(unsigned short, "ushort")
BIND_SETGET(int, "int")
BIND_SETGET(unsigned int, "uint")
BIND_SETGET(long, "long")
BIND_SETGET(unsigned long, "ulong")
BIND_SETGET(long long, "longlong")
BIND_SETGET(unsigned long long, "ulonglong")
BIND_SETGET(float, "float")
BIND_SETGET(double, "double")
BIND_SETGET(bool, "bool")
BIND_SETGET(void*, "void_p")
vm->bind_method<1>(type, "read_bytes", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
i64 size = CAST(i64, args[1]);
std::vector<char> buffer(size);
memcpy(buffer.data(), self.ptr, size);
return VAR(Bytes(std::move(buffer)));
});
vm->bind_method<1>(type, "write_bytes", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
Bytes& bytes = CAST(Bytes&, args[1]);
memcpy(self.ptr, bytes.data(), bytes.size());
return vm->None;
});
#undef BIND_SETGET
}
void C99Struct::_register(VM* vm, PyObject* mod, PyObject* type){
vm->bind_constructor<-1>(type, [](VM* vm, ArgsView args){
if(args.size() == 1+1){
if(is_int(args[1])){
int size = _CAST(int, args[1]);
return VAR_T(C99Struct, size);
}
if(is_non_tagged_type(args[1], vm->tp_str)){
const Str& s = _CAST(Str&, args[1]);
return VAR_T(C99Struct, (void*)s.data, s.size);
}
if(is_non_tagged_type(args[1], vm->tp_bytes)){
const Bytes& b = _CAST(Bytes&, args[1]);
return VAR_T(C99Struct, (void*)b.data(), b.size());
}
vm->TypeError("expected int, str or bytes");
return vm->None;
}
if(args.size() == 1+2){
void* p = CAST(void*, args[1]);
int size = CAST(int, args[2]);
return VAR_T(C99Struct, p, size);
}
vm->TypeError("expected 1 or 2 arguments");
return vm->None;
});
vm->bind_method<0>(type, "addr", [](VM* vm, ArgsView args){
C99Struct& self = _CAST(C99Struct&, args[0]);
return VAR_T(VoidP, self.p);
});
vm->bind_method<0>(type, "size", [](VM* vm, ArgsView args){
C99Struct& self = _CAST(C99Struct&, args[0]);
return VAR(self.size);
});
vm->bind_method<0>(type, "copy", [](VM* vm, ArgsView args){
const C99Struct& self = _CAST(C99Struct&, args[0]);
return VAR_T(C99Struct, self);
});
vm->bind_method<0>(type, "to_string", [](VM* vm, ArgsView args){
C99Struct& self = _CAST(C99Struct&, args[0]);
return VAR(Str(self.p, self.size));
});
vm->bind_method<0>(type, "to_bytes", [](VM* vm, ArgsView args){
C99Struct& self = _CAST(C99Struct&, args[0]);
std::vector<char> buffer(self.size);
memcpy(buffer.data(), self.p, self.size);
return VAR(Bytes(std::move(buffer)));
});
vm->bind__eq__(PK_OBJ_GET(Type, type), [](VM* vm, PyObject* lhs, PyObject* rhs){
C99Struct& self = _CAST(C99Struct&, lhs);
if(!is_non_tagged_type(rhs, C99Struct::_type(vm))) return vm->NotImplemented;
C99Struct& other = _CAST(C99Struct&, rhs);
bool ok = self.size == other.size && memcmp(self.p, other.p, self.size) == 0;
return VAR(ok);
});
#define BIND_SETGET(T, name) \
vm->bind(type, "read_" name "(self, offset=0)", [](VM* vm, ArgsView args){ \
C99Struct& self = _CAST(C99Struct&, args[0]); \
i64 offset = CAST(i64, args[1]); \
void* ptr = self.p + offset; \
return VAR(*(T*)ptr); \
}); \
vm->bind(type, "write_" name "(self, value, offset=0)", [](VM* vm, ArgsView args){ \
C99Struct& self = _CAST(C99Struct&, args[0]); \
i64 offset = CAST(i64, args[2]); \
void* ptr = self.p + offset; \
*(T*)ptr = CAST(T, args[1]); \
return vm->None; \
});
BIND_SETGET(char, "char")
BIND_SETGET(unsigned char, "uchar")
BIND_SETGET(short, "short")
BIND_SETGET(unsigned short, "ushort")
BIND_SETGET(int, "int")
BIND_SETGET(unsigned int, "uint")
BIND_SETGET(long, "long")
BIND_SETGET(unsigned long, "ulong")
BIND_SETGET(long long, "longlong")
BIND_SETGET(unsigned long long, "ulonglong")
BIND_SETGET(float, "float")
BIND_SETGET(double, "double")
BIND_SETGET(bool, "bool")
BIND_SETGET(void*, "void_p")
#undef BIND_SETGET
// patch VoidP
type = vm->_t(VoidP::_type(vm));
vm->bind_method<1>(type, "read_struct", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
const Str& type = CAST(Str&, args[1]);
int size = c99_sizeof(vm, type);
return VAR_T(C99Struct, self.ptr, size);
});
vm->bind_method<1>(type, "write_struct", [](VM* vm, ArgsView args){
VoidP& self = _CAST(VoidP&, args[0]);
C99Struct& other = CAST(C99Struct&, args[1]);
memcpy(self.ptr, other.p, other.size);
return vm->None;
});
}
void C99ReflType::_register(VM* vm, PyObject* mod, PyObject* type){
vm->bind_notimplemented_constructor<C99ReflType>(type);
vm->bind_method<0>(type, "__call__", [](VM* vm, ArgsView args){
C99ReflType& self = _CAST(C99ReflType&, args[0]);
return VAR_T(C99Struct, nullptr, self.size);
});
vm->bind_method<0>(type, "__repr__", [](VM* vm, ArgsView args){
C99ReflType& self = _CAST(C99ReflType&, args[0]);
return VAR("<ctype '" + Str(self.name) + "'>");
});
vm->bind_method<0>(type, "name", [](VM* vm, ArgsView args){
C99ReflType& self = _CAST(C99ReflType&, args[0]);
return VAR(self.name);
});
vm->bind_method<0>(type, "size", [](VM* vm, ArgsView args){
C99ReflType& self = _CAST(C99ReflType&, args[0]);
return VAR(self.size);
});
vm->bind__getitem__(PK_OBJ_GET(Type, type), [](VM* vm, PyObject* obj, PyObject* key){
C99ReflType& self = _CAST(C99ReflType&, obj);
const Str& name = CAST(Str&, key);
auto it = std::lower_bound(self.fields.begin(), self.fields.end(), name.sv());
if(it == self.fields.end() || it->name != name.sv()){
vm->KeyError(key);
return vm->None;
}
return VAR(it->offset);
});
}
void add_module_c(VM* vm){
PyObject* mod = vm->new_module("c");
vm->bind_func<1>(mod, "malloc", [](VM* vm, ArgsView args){
i64 size = CAST(i64, args[0]);
return VAR(malloc(size));
});
vm->bind_func<1>(mod, "free", [](VM* vm, ArgsView args){
void* p = CAST(void*, args[0]);
free(p);
return vm->None;
});
vm->bind_func<1>(mod, "sizeof", [](VM* vm, ArgsView args){
const Str& type = CAST(Str&, args[0]);
i64 size = c99_sizeof(vm, type);
return VAR(size);
});
vm->bind_func<1>(mod, "refl", [](VM* vm, ArgsView args){
const Str& key = CAST(Str&, args[0]);
auto it = _refl_types.find(key.sv());
if(it == _refl_types.end()) vm->ValueError("reflection type not found");
const ReflType& rt = it->second;
return VAR_T(C99ReflType, rt);
});
vm->bind_func<3>(mod, "memset", [](VM* vm, ArgsView args){
void* p = CAST(void*, args[0]);
memset(p, CAST(int, args[1]), CAST(size_t, args[2]));
return vm->None;
});
vm->bind_func<3>(mod, "memcpy", [](VM* vm, ArgsView args){
void* dst = CAST(void*, args[0]);
void* src = CAST(void*, args[1]);
i64 size = CAST(i64, args[2]);
memcpy(dst, src, size);
return vm->None;
});
VoidP::register_class(vm, mod);
C99Struct::register_class(vm, mod);
C99ReflType::register_class(vm, mod);
mod->attr().set("NULL", VAR_T(VoidP, nullptr));
add_refl_type("char", sizeof(char), {});
add_refl_type("uchar", sizeof(unsigned char), {});
add_refl_type("short", sizeof(short), {});
add_refl_type("ushort", sizeof(unsigned short), {});
add_refl_type("int", sizeof(int), {});
add_refl_type("uint", sizeof(unsigned int), {});
add_refl_type("long", sizeof(long), {});
add_refl_type("ulong", sizeof(unsigned long), {});
add_refl_type("longlong", sizeof(long long), {});
add_refl_type("ulonglong", sizeof(unsigned long long), {});
add_refl_type("float", sizeof(float), {});
add_refl_type("double", sizeof(double), {});
add_refl_type("bool", sizeof(bool), {});
add_refl_type("void_p", sizeof(void*), {});
PyObject* void_p_t = mod->attr("void_p");
for(const char* t: {"char", "uchar", "short", "ushort", "int", "uint", "long", "ulong", "longlong", "ulonglong", "float", "double", "bool"}){
mod->attr().set(Str(t) + "_", VAR_T(C99ReflType, _refl_types[t]));
mod->attr().set(Str(t) + "_p", void_p_t);
}
}
int c99_sizeof(VM* vm, const Str& type){
auto it = _refl_types.find(type.sv());
if(it != _refl_types.end()) return it->second.size;
vm->ValueError("not a valid c99 type");
return 0;
}
} // namespace pkpy
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