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Merge pull request #70 from koltenpearson/c_binding_api

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revamped c bindings
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BLUELOVETH 2023-05-07 20:02:23 +08:00 committed by GitHub
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544
c_bindings/pocketpy_c.cpp Normal file
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#include "pocketpy.h"
#include "pocketpy_c.h"
using namespace pkpy;
#define PKPY_STACK_SIZE 32
#define SAFEGUARD_OPEN try { \
#define SAFEGUARD_CLOSE \
} catch(std::exception& e) { \
std::cerr << "ERROR: a std::exception " \
<< "this probably means pocketpy itself has a bug!\n" \
<< e.what() << "\n"; \
exit(2); \
} catch(...) { \
std::cerr << "ERROR: a unknown exception was thrown " \
<< "this probably means pocketpy itself has a bug!\n"; \
exit(2); \
}
#define ERRHANDLER_OPEN SAFEGUARD_OPEN \
try { \
if (vm->c_data->size() > 0 && vm->c_data->top() == nullptr) \
return false; \
#define ERRHANDLER_CLOSE \
} catch( Exception e ) { \
vm->c_data->push(py_var(vm, e)); \
vm->c_data->push(NULL); \
return false; \
} \
SAFEGUARD_CLOSE \
class CVM : public VM {
public :
ValueStackImpl<PKPY_STACK_SIZE>* c_data;
CVM(bool enable_os=true) : VM(enable_os) {
c_data = new ValueStackImpl<PKPY_STACK_SIZE>();
}
~CVM() {
c_data->clear();
delete c_data;
}
};
//for now I will unpack a tuple automatically, we may not want to handle
//it this way, not sure
//it is more lua like, but maybe not python like
static void unpack_return(CVM* vm, PyObject* ret) {
if (is_type(ret, vm->tp_tuple)) {
Tuple& t = py_cast<Tuple&>(vm, ret);
for (int i = 0; i < t.size(); i++)
vm->c_data->push(t[i]);
} else if (ret == vm->None) {
//do nothing here
//having to pop the stack after every call that returns none is annoying
//lua does not do this
//
//so for now we will not push none on the stack when it is the sole thing returned
//if this becomes a problem we can change it
//
//you can still check if it returned none by comparing stack size before
//and after if you have to
} else
vm->c_data->push(ret);
}
bool pkpy_clear_error(pkpy_vm* vm_handle, char** message) {
CVM* vm = (CVM*) vm_handle;
SAFEGUARD_OPEN
if (vm->c_data->size() == 0 || vm->c_data->top() != nullptr)
return false;
vm->c_data->pop();
Exception& e = py_cast<Exception&>(vm, vm->c_data->top());
if (message != nullptr)
*message = e.summary().c_str_dup();
else
std::cerr << "ERROR: " << e.summary() << "\n";
vm->c_data->clear();
vm->callstack.clear();
vm->s_data.clear();
return true;
SAFEGUARD_CLOSE
}
void gc_marker_ex(CVM* vm) {
for(PyObject* obj: *vm->c_data) if(obj!=nullptr) OBJ_MARK(obj);
}
static void noop_output_handler(VM* vm, const Str& str) {
(void) vm;
(void) str;
}
pkpy_vm* pkpy_vm_create(bool use_stdio, bool enable_os) {
CVM* vm = new CVM(enable_os);
vm->c_data = new ValueStackImpl<PKPY_STACK_SIZE>();
vm->_gc_marker_ex = (void (*)(VM*)) gc_marker_ex;
if (!use_stdio) {
vm->_stdout = noop_output_handler;
vm->_stderr = noop_output_handler;
}
return (pkpy_vm*) vm;
}
bool pkpy_vm_run(pkpy_vm* vm_handle, const char* source) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
CodeObject_ code = vm->compile(source, "<c-bound>", EXEC_MODE);
PyObject* result = vm->_exec(code, vm->_main);
//unpack_return(w, result);
//NOTE: it seems like vm->_exec should return whatever the last command it
//ran returned but instead it seems to pretty much always return None
//so I guess uncomment this line if that every changes
return true;
ERRHANDLER_CLOSE
}
void pkpy_vm_destroy(pkpy_vm* vm_handle) {
CVM* vm = (CVM*) vm_handle;
delete vm;
}
static void propagate_if_errored(CVM* vm, ValueStackImpl<PKPY_STACK_SIZE>* stored_stack) {
try {
if (vm->c_data->size() == 0 || vm->c_data->top() != nullptr)
return;
vm->c_data->pop();
Exception& e = py_cast<Exception&>(vm, vm->c_data->top());
vm->c_data->pop();
vm->c_data = stored_stack;
throw e;
} catch(Exception& e) {
throw;
} catch(...) {
std::cerr << "ERROR: a non pocketpy exeception was thrown "
<< "this probably means pocketpy itself has a bug!\n";
exit(2);
}
}
PyObject* c_function_wrapper(VM* vm, ArgsView args) {
LuaStyleFuncC f = py_cast<NativeFunc&>(vm, args[-2])._lua_f;
CVM* cvm = (CVM*) vm;
//setup c stack
ValueStackImpl<PKPY_STACK_SIZE> local_stack;
for (int i = 0; i < args.size(); i++)
local_stack.push(args[i]);
ValueStackImpl<PKPY_STACK_SIZE>* stored_stack = cvm->c_data;
cvm->c_data = &local_stack;
int retc = f(cvm);
propagate_if_errored(cvm, stored_stack);
cvm->c_data = stored_stack;
PyObject* ret = cvm->None;
if (retc == 1)
ret = local_stack.top();
else if (retc > 1) {
Tuple t(retc);
for (int i = 0; i < retc; i++) {
int stack_index = (local_stack.size() - retc) + i;
t[i] = local_stack.begin()[stack_index];
}
ret = py_var(cvm, t);
}
return ret;
}
bool pkpy_push_function(pkpy_vm* vm_handle, pkpy_function f) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
//TODO right now we just treat all c bound functions a varargs functions
//do we want to change that?
NativeFunc nf = NativeFunc(c_function_wrapper, -1, 0);
nf._lua_f = (LuaStyleFuncC) f;
vm->c_data->push(py_var(vm, nf));
return true;
ERRHANDLER_CLOSE
}
bool pkpy_push_int(pkpy_vm* vm_handle, int value) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
vm->c_data->push(py_var(vm, value));
return true;
ERRHANDLER_CLOSE
}
bool pkpy_push_float(pkpy_vm* vm_handle, double value) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
vm->c_data->push(py_var(vm, value));
return true;
ERRHANDLER_CLOSE
}
bool pkpy_push_bool(pkpy_vm* vm_handle, bool value) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
vm->c_data->push(py_var(vm, value));
return true;
ERRHANDLER_CLOSE
}
bool pkpy_push_string(pkpy_vm* vm_handle, const char* value) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
vm->c_data->push(py_var(vm, value));
return true;
ERRHANDLER_CLOSE
}
bool pkpy_push_stringn(pkpy_vm* vm_handle, const char* value, int length) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
Str s = Str(value, length);
vm->c_data->push(py_var(vm, s));
return true;
ERRHANDLER_CLOSE
}
bool pkpy_push_voidp(pkpy_vm* vm_handle, void* value) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
vm->c_data->push(py_var(vm, value));
return true;
ERRHANDLER_CLOSE
}
bool pkpy_push_none(pkpy_vm* vm_handle) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
vm->c_data->push(vm->None);
return true;
ERRHANDLER_CLOSE
}
bool pkpy_set_global(pkpy_vm* vm_handle, const char* name) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
vm->_main->attr().set(name, vm->c_data->top());
vm->c_data->pop();
return true;
ERRHANDLER_CLOSE
}
//get global will also get bulitins
bool pkpy_get_global(pkpy_vm* vm_handle, const char* name) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
PyObject* o = vm->_main->attr().try_get(name);
if (o == nullptr) {
o = vm->builtins->attr().try_get(name);
if (o == nullptr)
vm->NameError("could not find requested global");
}
vm->c_data->push(o);
return true;
ERRHANDLER_CLOSE
}
bool pkpy_call(pkpy_vm* vm_handle, int argc) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
int callable_index = vm->c_data->size() - argc - 1;
PyObject* callable = vm->c_data->begin()[callable_index];
vm->s_data.push(callable);
vm->s_data.push(PY_NULL);
for (int i = 0; i < argc; i++)
vm->s_data.push(vm->c_data->begin()[callable_index + i + 1]);
PyObject* o = vm->vectorcall(argc);
vm->c_data->shrink(argc + 1);
unpack_return(vm, o);
return true;
ERRHANDLER_CLOSE
}
bool pkpy_call_method(pkpy_vm* vm_handle, const char* name, int argc) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
int self_index = vm->c_data->size() - argc - 1;
PyObject* self = vm->c_data->begin()[self_index];
PyObject* callable = vm->get_unbound_method(self, name, &self);
vm->s_data.push(callable);
vm->s_data.push(self);
for (int i = 0; i < argc; i++)
vm->s_data.push(vm->c_data->begin()[self_index + i + 1]);
PyObject* o = vm->vectorcall(argc);
vm->c_data->shrink(argc + 1);
unpack_return(vm, o);
return true;
ERRHANDLER_CLOSE
}
static int lua_to_cstack_index(int index, int size) {
if (index < 0)
index = size + index;
return index;
}
bool pkpy_to_int(pkpy_vm* vm_handle, int index, int* ret) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
if (ret != nullptr)
*ret = py_cast<int>(vm, o);
return true;
ERRHANDLER_CLOSE
}
bool pkpy_to_float(pkpy_vm* vm_handle, int index, double* ret) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
if (ret != nullptr)
*ret = py_cast<double>(vm, o);
return true;
ERRHANDLER_CLOSE
}
bool pkpy_to_bool(pkpy_vm* vm_handle, int index, bool* ret) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
if (ret != nullptr)
*ret = py_cast<bool>(vm, o);
return true;
ERRHANDLER_CLOSE
}
bool pkpy_to_voidp(pkpy_vm* vm_handle, int index, void** ret) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
if (ret != nullptr)
*ret = py_cast<void*>(vm, o);
return true;
ERRHANDLER_CLOSE
}
bool pkpy_to_string(pkpy_vm* vm_handle, int index, char** ret) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
if (ret != nullptr) {
Str& s = py_cast<Str&>(vm, o);
*ret = s.c_str_dup();
}
return true;
ERRHANDLER_CLOSE
}
bool pkpy_to_stringn(pkpy_vm* vm_handle, int index, const char** ret, int* size) {
CVM* vm = (CVM*) vm_handle;
ERRHANDLER_OPEN
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
if (ret != nullptr) {
std::string_view sv = py_cast<Str&>(vm, o).sv();
*ret = sv.data();
*size = sv.size();
}
return true;
ERRHANDLER_CLOSE
}
bool pkpy_is_int(pkpy_vm* vm_handle, int index) {
CVM* vm = (CVM*) vm_handle;
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
return is_type(o, vm->tp_int);
}
bool pkpy_is_float(pkpy_vm* vm_handle, int index) {
CVM* vm = (CVM*) vm_handle;
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
return is_type(o, vm->tp_float);
}
bool pkpy_is_bool(pkpy_vm* vm_handle, int index) {
CVM* vm = (CVM*) vm_handle;
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
return is_type(o, vm->tp_bool);
}
bool pkpy_is_string(pkpy_vm* vm_handle, int index) {
CVM* vm = (CVM*) vm_handle;
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
return is_type(o, vm->tp_str);
}
bool pkpy_is_voidp(pkpy_vm* vm_handle, int index) {
CVM* vm = (CVM*) vm_handle;
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
return is_type(o, VoidP::_type(vm));
}
bool pkpy_is_none(pkpy_vm* vm_handle, int index) {
CVM* vm = (CVM*) vm_handle;
index = lua_to_cstack_index(index, vm->c_data->size());
PyObject* o = vm->c_data->begin()[index];
return o == vm->None;
}
bool pkpy_check_global(pkpy_vm* vm_handle, const char* name) {
CVM* vm = (CVM*) vm_handle;
SAFEGUARD_OPEN
PyObject* o = vm->_main->attr().try_get(name);
if (o == nullptr) {
o = vm->builtins->attr().try_get(name);
if (o == nullptr)
return false;
}
return true;
SAFEGUARD_CLOSE
}
bool pkpy_check_error(pkpy_vm* vm_handle) {
CVM* vm = (CVM*) vm_handle;
SAFEGUARD_OPEN
if (vm->c_data->size() > 0 && vm->c_data->top() == nullptr)
return true;
return false;
SAFEGUARD_CLOSE
}
bool pkpy_check_stack(pkpy_vm* vm_handle, int free) {
CVM* vm = (CVM*) vm_handle;
return free + vm->c_data->size() <= PKPY_STACK_SIZE;
}
int pkpy_stack_size(pkpy_vm* vm_handle) {
CVM* vm = (CVM*) vm_handle;
return vm->c_data->size();
}
bool pkpy_pop(pkpy_vm* vm_handle, int n) {
CVM* vm = (CVM*) vm_handle;
vm->c_data->shrink(n);
return true;
}

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#ifndef POCKETPY_C_H
#define POCKETPY_C_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdbool.h>
#include <stdint.h>
typedef struct pkpy_vm_handle pkpy_vm;
//we we take a lot of inspiration from the lua api for these bindings
//the key difference being most methods return a bool,
//true if it succeeded false if it did not
//if a method returns false call the pkpy_clear_error method to check the error and clear it
//if pkpy_clear_error returns false it means that no error was set, and it takes no action
//if pkpy_clear_error returns true it means there was an error and it was cleared,
//it will provide a string summary of the error in the message parameter (if it is not NULL)
//if null is passed in as message, and it will just print the message to stderr
bool pkpy_clear_error(pkpy_vm*, char** message);
//NOTE you are responsible for freeing message
pkpy_vm* pkpy_vm_create(bool use_stdio, bool enable_os);
bool pkpy_vm_run(pkpy_vm*, const char* source);
void pkpy_vm_destroy(pkpy_vm*);
typedef int (*pkpy_function)(pkpy_vm*);
bool pkpy_pop(pkpy_vm*, int n);
bool pkpy_push_function(pkpy_vm*, pkpy_function);
bool pkpy_push_int(pkpy_vm*, int);
bool pkpy_push_float(pkpy_vm*, double);
bool pkpy_push_bool(pkpy_vm*, bool);
bool pkpy_push_string(pkpy_vm*, const char*);
bool pkpy_push_stringn(pkpy_vm*, const char*, int length);
bool pkpy_push_voidp(pkpy_vm*, void*);
bool pkpy_push_none(pkpy_vm*);
bool pkpy_set_global(pkpy_vm*, const char* name);
bool pkpy_get_global(pkpy_vm*, const char* name);
//first push callable you want to call
//then push the arguments to send
//argc is the number of arguments that was pushed (not counting the callable)
bool pkpy_call(pkpy_vm*, int argc);
//first push the object the method belongs to (self)
//then push the the argments
//argc is the number of arguments that was pushed (not counting the callable or self)
//name is the name of the method to call on the object
bool pkpy_call_method(pkpy_vm*, const char* name, int argc);
//we will break with the lua api here
//lua uses 1 as the index to the first pushed element for all of these functions
//but we will start counting at zero to match python
//we will allow negative numbers to count backwards from the top
bool pkpy_to_int(pkpy_vm*, int index, int* ret);
bool pkpy_to_float(pkpy_vm*, int index, double* ret);
bool pkpy_to_bool(pkpy_vm*, int index, bool* ret);
bool pkpy_to_voidp(pkpy_vm*, int index, void** ret);
//this method provides a strong reference, you are responsible for freeing the
//string when you are done with it
bool pkpy_to_string(pkpy_vm*, int index, char** ret);
//this method provides a weak reference, it is only valid until the
//next api call
//it is not null terminated
bool pkpy_to_stringn(pkpy_vm*, int index, const char** ret, int* size);
//these do not follow the same error semantics as above, their return values
//just say whether the check succeeded or not, or else return the value asked for
bool pkpy_is_int(pkpy_vm*, int index);
bool pkpy_is_float(pkpy_vm*, int index);
bool pkpy_is_bool(pkpy_vm*, int index);
bool pkpy_is_string(pkpy_vm*, int index);
bool pkpy_is_voidp(pkpy_vm*, int index);
bool pkpy_is_none(pkpy_vm*, int index);
//will return true if global exists
bool pkpy_check_global(pkpy_vm*, const char* name);
//will return true if the vm is currently in an error state
bool pkpy_check_error(pkpy_vm*);
//will return true if at least free empty slots remain on the stack
bool pkpy_check_stack(pkpy_vm*, int free);
//returns the number of elements on the stack
int pkpy_stack_size(pkpy_vm*);
#ifdef __cplusplus
}
#endif
#endif

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#include "pocketpy_c.h"
#include <stdio.h>
#include <stdlib.h>
//tests the c bindings for pocketpy
void check_impl(pkpy_vm* vm, bool result, int lineno) {
if (!result) {
printf("ERROR: failed where it should have succeed at line %i\n", lineno);
char* message;
if (!pkpy_clear_error(vm, &message)) {
printf("clear error reported everything was fine\n");
exit(1);
}
printf("%s\n", message);
free(message);
exit(1);
}
}
void fail_impl(pkpy_vm* vm, bool result, int lineno) {
if (result) {
printf("ERROR: succeeded where it should have failed line %i\n", lineno);
exit(1);
} else {
char* message;
if (pkpy_clear_error(vm, &message)) {
printf("actually errored!\n");
free(message);
exit(1);
}
}
}
void error_impl(pkpy_vm* vm, bool result, int lineno) {
if (result) {
printf("ERROR: succeeded where it should have failed line %i\n", lineno);
exit(1);
} else {
char* message;
if (!pkpy_clear_error(vm, &message))
printf("clear error reported everything was fine\n");
else {
printf("successfully errored with this message: \n");
printf("%s\n", message);
free(message);
}
}
}
#define check(r) check_impl(vm, (r), __LINE__)
#define fail(r) fail_impl(vm, (r), __LINE__)
#define error(r) error_impl(vm, (r), __LINE__)
int test_binding(pkpy_vm* vm) {
pkpy_push_int(vm, 12);
return 1;
}
int test_multiple_return(pkpy_vm* vm) {
pkpy_push_int(vm, 12);
pkpy_push_int(vm, 13);
return 2;
}
int test_return_none(pkpy_vm* vm) {
return 0;
}
int test_error_propagate(pkpy_vm* vm) {
pkpy_get_global(vm, "does not exist");
return 1;
}
pkpy_vm* vm;
void cleanup(void) {
pkpy_vm_destroy(vm);
}
int main(int argc, char** argv) {
vm = pkpy_vm_create(true, true);
atexit(cleanup);
//test run
check(pkpy_vm_run(vm, "print('hello world!')"));
error(pkpy_get_global(vm, "nonexistatn"));
printf("\ntesting int methods\n");
int r_int;
check(pkpy_push_int(vm, 11));
check(pkpy_set_global(vm, "eleven"));
check(pkpy_vm_run(vm, "print(eleven)"));
check(pkpy_get_global(vm, "eleven"));
check(pkpy_is_int(vm, -1));
check(pkpy_to_int(vm, -1, &r_int));
printf("%i\n", r_int);
fail(pkpy_is_float(vm, -1));
fail(pkpy_is_bool(vm, -1));
fail(pkpy_is_string(vm, -1));
fail(pkpy_is_none(vm, -1));
fail(pkpy_is_voidp(vm, -1));
printf("\ntesting float methods\n");
double r_float;
check(pkpy_push_float(vm, 11.11));
check(pkpy_set_global(vm, "elevenf"));
check(pkpy_vm_run(vm, "print(elevenf)"));
check(pkpy_get_global(vm, "elevenf"));
check(pkpy_is_float(vm, -1));
check(pkpy_to_float(vm, -1, &r_float));
printf("%f\n", r_float);
fail(pkpy_is_int(vm, -1));
fail(pkpy_is_bool(vm, -1));
fail(pkpy_is_string(vm, -1));
fail(pkpy_is_none(vm, -1));
fail(pkpy_is_voidp(vm, -1));
printf("\ntesting bool methods\n");
bool r_bool;
check(pkpy_push_bool(vm, false));
check(pkpy_set_global(vm, "false_test"));
check(pkpy_vm_run(vm, "print(false_test)"));
check(pkpy_get_global(vm, "false_test"));
check(pkpy_is_bool(vm, -1));
check(pkpy_to_bool(vm, -1, &r_bool));
printf("%i\n", r_bool);
fail(pkpy_is_int(vm, -1));
fail(pkpy_is_float(vm, -1));
fail(pkpy_is_string(vm, -1));
fail(pkpy_is_none(vm, -1));
fail(pkpy_is_voidp(vm, -1));
printf("\ntesting string methods\n");
char* r_string;
check(pkpy_push_string(vm, "hello!"));
check(pkpy_set_global(vm, "hello1"));
check(pkpy_vm_run(vm, "print(hello1)"));
check(pkpy_push_stringn(vm, "hello!", 5));
check(pkpy_is_string(vm, -1));
check(pkpy_to_string(vm, -1, &r_string));
printf("%s\n", r_string);
free(r_string);
const char* r_stringn;
int r_size;
check(pkpy_to_stringn(vm, -1, &r_stringn, &r_size));
printf("%.*s\n", r_size, r_stringn);
fail(pkpy_is_int(vm, -1));
fail(pkpy_is_float(vm, -1));
fail(pkpy_is_bool(vm, -1));
fail(pkpy_is_none(vm, -1));
fail(pkpy_is_voidp(vm, -1));
printf("\ntesting None methods\n");
check(pkpy_push_none(vm));
check(pkpy_set_global(vm, "none"));
check(pkpy_vm_run(vm, "print(none)"));
check(pkpy_get_global(vm, "none"));
check(pkpy_is_none(vm, -1));
fail(pkpy_is_int(vm, -1));
fail(pkpy_is_float(vm, -1));
fail(pkpy_is_bool(vm, -1));
fail(pkpy_is_string(vm, -1));
fail(pkpy_is_voidp(vm, -1));
printf("\ntesting voidp methods\n");
void* vp = (void*) 123;
check(pkpy_push_voidp(vm, vp));
check(pkpy_set_global(vm, "vp"));
check(pkpy_vm_run(vm, "print(vp)"));
check(pkpy_get_global(vm, "vp"));
check(pkpy_is_voidp(vm, -1));
vp = NULL;
check(pkpy_to_voidp(vm, -1, &vp));
printf("%i\n", (int) (intptr_t) vp);
fail(pkpy_is_int(vm, -1));
fail(pkpy_is_float(vm, -1));
fail(pkpy_is_bool(vm, -1));
fail(pkpy_is_string(vm, -1));
fail(pkpy_is_none(vm, -1));
printf("\ntesting sizing and indexing\n");
int stack_size = pkpy_stack_size(vm);
printf("stack size %i\n", stack_size);
check(pkpy_check_stack(vm, 10));
check(pkpy_check_stack(vm, 26));
fail(pkpy_check_stack(vm, 27));
check(pkpy_is_int(vm, 0));
check(pkpy_is_float(vm, 1));
check(pkpy_is_bool(vm, 2));
check(pkpy_is_string(vm, 3));
check(pkpy_is_none(vm, 4));
check(pkpy_is_voidp(vm, 5));
check(pkpy_is_int(vm, -6));
check(pkpy_is_float(vm, -5));
check(pkpy_is_bool(vm, -4));
check(pkpy_is_string(vm, -3));
check(pkpy_is_none(vm, -2));
check(pkpy_is_voidp(vm, -1));
printf("\ntesting error catching\n");
error(pkpy_vm_run(vm, "let's make sure syntax errors get caught"));
check(pkpy_stack_size(vm) == 0); //stack should be cleared after error is resolved
printf("\ntesting calls\n");
check(pkpy_vm_run(vm, "def x(x, y) : return x - y"));
check(pkpy_vm_run(vm, "def vararg_x(*x) : return sum(x)"));
check(pkpy_vm_run(vm, "def keyword_x(x=1, y=1) : return x+y"));
check(pkpy_vm_run(vm, "def retmany_x() : return 1, 2, 3"));
check(pkpy_get_global(vm, "x"));
check(pkpy_push_int(vm, 2));
check(pkpy_push_int(vm, 3));
check(pkpy_call(vm, 2));
check(pkpy_to_int(vm, -1, &r_int));
printf("x : %i\n", r_int);
check(pkpy_get_global(vm, "vararg_x"));
check(pkpy_push_int(vm, 1));
check(pkpy_push_int(vm, 2));
check(pkpy_push_int(vm, 3));
check(pkpy_push_int(vm, 4));
check(pkpy_push_int(vm, 5));
check(pkpy_push_int(vm, 6));
check(pkpy_call(vm, 6));
check(pkpy_to_int(vm, -1, &r_int));
printf("vararg_x : %i\n", r_int);
check(pkpy_get_global(vm, "keyword_x"));
check(pkpy_push_int(vm, 3));
check(pkpy_call(vm, 1));
check(pkpy_to_int(vm, -1, &r_int));
printf("keyword_x : %i\n", r_int);
check(pkpy_get_global(vm, "keyword_x"));
check(pkpy_call(vm, 0));
check(pkpy_to_int(vm, -1, &r_int));
printf("keyword_x : %i\n", r_int);
check(pkpy_stack_size(vm) == 4);
check(pkpy_get_global(vm, "retmany_x"));
check(pkpy_call(vm, 0));
check(pkpy_stack_size(vm) == 7);
check(pkpy_to_int(vm, -3, &r_int));
printf("retmany_x : %i\n", r_int);
check(pkpy_to_int(vm, -2, &r_int));
printf("retmany_x : %i\n", r_int);
check(pkpy_to_int(vm, -1, &r_int));
printf("retmany_x : %i\n", r_int);
check(pkpy_get_global(vm, "x"));
error(pkpy_call(vm, 0));
check(pkpy_vm_run(vm, "l = []"));
check(pkpy_get_global(vm, "l"));
check(pkpy_push_string(vm, "hello"));
check(pkpy_call_method(vm, "append", 1));
check(pkpy_vm_run(vm, "print(l)"));
printf("\ntesting pushing functions\n");
check(pkpy_push_function(vm, test_binding));
check(pkpy_set_global(vm, "test_binding"));
check(pkpy_vm_run(vm, "print(test_binding())"));
check(pkpy_push_function(vm, test_multiple_return));
check(pkpy_set_global(vm, "test_multiple_return"));
//uncomment if _exec changes
//check(pkpy_vm_run(vm, "test_multiple_return()"));
//check(pkpy_stack_size(vm) == 2);
check(pkpy_push_function(vm, test_error_propagate));
check(pkpy_set_global(vm, "test_error_propagate"));
error(pkpy_vm_run(vm, "test_error_propagate()"));
check(pkpy_get_global(vm, "test_multiple_return"));
check(pkpy_call(vm, 0));
check(pkpy_stack_size(vm) == 2);
check(pkpy_pop(vm, 2));
check(pkpy_stack_size(vm) == 0);
check(pkpy_check_global(vm, "test_error_propagate"));
fail(pkpy_check_global(vm, "nonexistant"));
pkpy_vm_run(vm, "test_error_propagate()");
check(pkpy_check_error(vm));
return 0;
}

51
c_bindings/test_answers.txt Normal file
View File

@ -0,0 +1,51 @@
hello world!
successfully errored with this message:
NameError: name 'could not find requested global' is not defined
testing int methods
11
11
testing float methods
11.11
11.110000
testing bool methods
False
0
testing string methods
hello!
hello
hello
testing None methods
None
testing voidp methods
<void* at 0x7b>
123
testing sizing and indexing
stack size 6
testing error catching
successfully errored with this message:
File "<c-bound>", line 1
let's make sure syntax errors get caught
SyntaxError: EOL while scanning string literal
testing calls
x : -1
vararg_x : 21
keyword_x : 4
keyword_x : 2
retmany_x : 1
retmany_x : 2
retmany_x : 3
successfully errored with this message:
TypeError: expected 2 positional arguments, but got 0 (x)
['hello']
testing pushing functions
12

26
run_c_binding_test.sh Normal file
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@ -0,0 +1,26 @@
python3 preprocess.py
if [ ! -f "pocketpy_c.o" ]
then
echo "compiling c++ lib"
clang++ -c -o pocketpy_c.o c_bindings/pocketpy_c.cpp -Wfatal-errors --std=c++17 -O2 -Wall -Wno-sign-compare -Wno-unused-variable -fno-rtti -stdlib=libc++ -I src/ -fsanitize=address -g
else
echo "DETECTED PREVIOUS COMPILATION USING IT"
fi
echo "compiling c executable"
clang -c -o test.o c_bindings/test.c -Wfatal-errors -O2 -Wall -Wno-sign-compare -Wno-unused-variable -I src/ -fsanitize=address -g
echo "linking"
clang++ -o c_binding_test test.o pocketpy_c.o -stdlib=libc++ -fsanitize=address -g
echo "running, leaksanitizer is finding a false postive leak in the CVM constructor"
echo "ignore that but pay attention to anything else"
./c_binding_test > binding_test_scratch
echo "checking results (they should be identical)"
diff -q -s binding_test_scratch c_bindings/test_answers.txt
echo "cleaning up"
rm pocketpy_c.o
rm test.o
rm binding_test_scratch
rm c_binding_test