コード例 #1
0
ファイル: Function.c プロジェクト: Jefers/saffron_app
static void
callback_invoke(ffi_cif* cif, void* retval, void** parameters, void* user_data)
{
    Closure* closure = (Closure *) user_data;
    Function* fn = (Function *) closure->info;
    FunctionType *cbInfo = fn->info;
    VALUE* rbParams;
    VALUE rbReturnValue;
    int i;

    rbParams = ALLOCA_N(VALUE, cbInfo->parameterCount);
    for (i = 0; i < cbInfo->parameterCount; ++i) {
        VALUE param;
        switch (cbInfo->parameterTypes[i]->nativeType) {
            case NATIVE_INT8:
                param = INT2NUM(*(int8_t *) parameters[i]);
                break;
            case NATIVE_UINT8:
                param = UINT2NUM(*(uint8_t *) parameters[i]);
                break;
            case NATIVE_INT16:
                param = INT2NUM(*(int16_t *) parameters[i]);
                break;
            case NATIVE_UINT16:
                param = UINT2NUM(*(uint16_t *) parameters[i]);
                break;
            case NATIVE_INT32:
                param = INT2NUM(*(int32_t *) parameters[i]);
                break;
            case NATIVE_UINT32:
                param = UINT2NUM(*(uint32_t *) parameters[i]);
                break;
            case NATIVE_INT64:
                param = LL2NUM(*(int64_t *) parameters[i]);
                break;
            case NATIVE_UINT64:
                param = ULL2NUM(*(uint64_t *) parameters[i]);
                break;
            case NATIVE_LONG:
                param = LONG2NUM(*(long *) parameters[i]);
                break;
            case NATIVE_ULONG:
                param = ULONG2NUM(*(unsigned long *) parameters[i]);
                break;
            case NATIVE_FLOAT32:
                param = rb_float_new(*(float *) parameters[i]);
                break;
            case NATIVE_FLOAT64:
                param = rb_float_new(*(double *) parameters[i]);
                break;
            case NATIVE_STRING:
                param = (*(void **) parameters[i] != NULL) ? rb_tainted_str_new2(*(char **) parameters[i]) : Qnil;
                break;
            case NATIVE_POINTER:
                param = rbffi_Pointer_NewInstance(*(void **) parameters[i]);
                break;
            case NATIVE_BOOL:
                param = (*(uint8_t *) parameters[i]) ? Qtrue : Qfalse;
                break;

            case NATIVE_FUNCTION:
            case NATIVE_CALLBACK:
                param = rbffi_NativeValue_ToRuby(cbInfo->parameterTypes[i],
                     rb_ary_entry(cbInfo->rbParameterTypes, i), parameters[i], Qnil);
                break;
            default:
                param = Qnil;
                break;
        }
        rbParams[i] = param;
    }
    rbReturnValue = rb_funcall2(fn->rbProc, id_call, cbInfo->parameterCount, rbParams);
    if (rbReturnValue == Qnil || TYPE(rbReturnValue) == T_NIL) {
        memset(retval, 0, cbInfo->ffiReturnType->size);
    } else switch (cbInfo->returnType->nativeType) {
        case NATIVE_INT8:
        case NATIVE_INT16:
        case NATIVE_INT32:
            *((ffi_sarg *) retval) = NUM2INT(rbReturnValue);
            break;
        case NATIVE_UINT8:
        case NATIVE_UINT16:
        case NATIVE_UINT32:
            *((ffi_arg *) retval) = NUM2UINT(rbReturnValue);
            break;
        case NATIVE_INT64:
            *((int64_t *) retval) = NUM2LL(rbReturnValue);
            break;
        case NATIVE_UINT64:
            *((uint64_t *) retval) = NUM2ULL(rbReturnValue);
            break;
        case NATIVE_LONG:
            *((ffi_sarg *) retval) = NUM2LONG(rbReturnValue);
            break;
        case NATIVE_ULONG:
            *((ffi_arg *) retval) = NUM2ULONG(rbReturnValue);
            break;
        case NATIVE_FLOAT32:
            *((float *) retval) = (float) NUM2DBL(rbReturnValue);
            break;
        case NATIVE_FLOAT64:
            *((double *) retval) = NUM2DBL(rbReturnValue);
            break;
        case NATIVE_POINTER:
            if (TYPE(rbReturnValue) == T_DATA && rb_obj_is_kind_of(rbReturnValue, rbffi_PointerClass)) {
                *((void **) retval) = ((AbstractMemory *) DATA_PTR(rbReturnValue))->address;
            } else {
                // Default to returning NULL if not a value pointer object.  handles nil case as well
                *((void **) retval) = NULL;
            }
            break;

        case NATIVE_BOOL:
            *((ffi_arg *) retval) = rbReturnValue == Qtrue;
            break;

        case NATIVE_FUNCTION:
        case NATIVE_CALLBACK:
            if (TYPE(rbReturnValue) == T_DATA && rb_obj_is_kind_of(rbReturnValue, rbffi_PointerClass)) {

                *((void **) retval) = ((AbstractMemory *) DATA_PTR(rbReturnValue))->address;

            } else if (rb_obj_is_kind_of(rbReturnValue, rb_cProc) || rb_respond_to(rbReturnValue, id_call)) {
                VALUE function;

                function = rbffi_Function_ForProc(cbInfo->rbReturnType, rbReturnValue);

                *((void **) retval) = ((AbstractMemory *) DATA_PTR(function))->address;
            } else {
                *((void **) retval) = NULL;
            }
            break;

        default:
            *((ffi_arg *) retval) = 0;
            break;
    }
}
コード例 #2
0
ファイル: Call.c プロジェクト: albanpeignier/ffi
static VALUE
returnL(FunctionType* fnInfo, L* result)
{
    if (unlikely(!fnInfo->ignoreErrno)) {
        rbffi_save_errno();
    }

    /*
     * This needs to do custom boxing of the return value, since a function
     * may only fill out the lower 8, 16 or 32 bits of %al, %ah, %eax, %rax, and
     * the upper part will be garbage.  This will truncate the value again, then
     * sign extend it.
     */
    switch (fnInfo->returnType->nativeType) {
    case NATIVE_VOID:
        return Qnil;

    case NATIVE_INT8:
        return INT2NUM(*(signed char *) result);

    case NATIVE_INT16:
        return INT2NUM(*(signed short *) result);

    case NATIVE_INT32:
        return INT2NUM(*(signed int *) result);

    case NATIVE_LONG:
        return LONG2NUM(*(signed long *) result);

    case NATIVE_UINT8:
        return UINT2NUM(*(unsigned char *) result);

    case NATIVE_UINT16:
        return UINT2NUM(*(unsigned short *) result);

    case NATIVE_UINT32:
        return UINT2NUM(*(unsigned int *) result);

    case NATIVE_ULONG:
        return ULONG2NUM(*(unsigned long *) result);

#ifdef __x86_64__
    case NATIVE_INT64:
        return LL2NUM(*(signed long long *) result);

    case NATIVE_UINT64:
        return ULL2NUM(*(unsigned long long *) result);
#endif /* __x86_64__ */

    case NATIVE_STRING:
        return *(void **) result != 0 ? rb_tainted_str_new2(*(char **) result) : Qnil;

    case NATIVE_POINTER:
        return rbffi_Pointer_NewInstance(*(void **) result);

    case NATIVE_BOOL:
        return *(char *) result != 0 ? Qtrue : Qfalse;

    default:
        rb_raise(rb_eRuntimeError, "invalid return type: %d", fnInfo->returnType->nativeType);
        return Qnil;
    }
}
コード例 #3
0
ファイル: Types.c プロジェクト: SFEley/ffi
VALUE
rbffi_NativeValue_ToRuby(Type* type, VALUE rbType, const void* ptr)
{
    switch (type->nativeType) {
        case NATIVE_VOID:
            return Qnil;
        case NATIVE_INT8:
          return INT2NUM((signed char) *(ffi_sarg *) ptr);
        case NATIVE_INT16:
          return INT2NUM((signed short) *(ffi_sarg *) ptr);
        case NATIVE_INT32:
          return INT2NUM((signed int) *(ffi_sarg *) ptr);
        case NATIVE_LONG:
            return LONG2NUM((signed long) *(ffi_sarg *) ptr);
        case NATIVE_INT64:
            return LL2NUM(*(signed long long *) ptr);

        case NATIVE_UINT8:
          return UINT2NUM((unsigned char) *(ffi_arg *) ptr);
        case NATIVE_UINT16:
          return UINT2NUM((unsigned short) *(ffi_arg *) ptr);
        case NATIVE_UINT32:
          return UINT2NUM((unsigned int) *(ffi_arg *) ptr);
        case NATIVE_ULONG:
            return ULONG2NUM((unsigned long) *(ffi_arg *) ptr);
        case NATIVE_UINT64:
            return ULL2NUM(*(unsigned long long *) ptr);

        case NATIVE_FLOAT32:
            return rb_float_new(*(float *) ptr);
        case NATIVE_FLOAT64:
            return rb_float_new(*(double *) ptr);

        case NATIVE_LONGDOUBLE:
	  return rbffi_longdouble_new(*(long double *) ptr);

        case NATIVE_STRING:
            return (*(void **) ptr != NULL) ? rb_tainted_str_new2(*(char **) ptr) : Qnil;
        case NATIVE_POINTER:
            return rbffi_Pointer_NewInstance(*(void **) ptr);
        case NATIVE_BOOL:
            return ((unsigned char) *(ffi_arg *) ptr) ? Qtrue : Qfalse;
        
        case NATIVE_FUNCTION:
        case NATIVE_CALLBACK: {
            return *(void **) ptr != NULL 
                    ? rbffi_Function_NewInstance(rbType, rbffi_Pointer_NewInstance(*(void **) ptr))
                    : Qnil;
        }

        case NATIVE_STRUCT: {
            StructByValue* sbv = (StructByValue *)type;
            AbstractMemory* mem;
            VALUE rbMemory = rbffi_MemoryPointer_NewInstance(1, sbv->base.ffiType->size, false);

            Data_Get_Struct(rbMemory, AbstractMemory, mem);
            memcpy(mem->address, ptr, sbv->base.ffiType->size);
            RB_GC_GUARD(rbMemory);
            RB_GC_GUARD(rbType);

            return rb_class_new_instance(1, &rbMemory, sbv->rbStructClass);
        }

        case NATIVE_MAPPED: {
            /*
             * For mapped types, first convert to the real native type, then upcall to
             * ruby to convert to the expected return type
             */
            MappedType* m = (MappedType *) type;
            VALUE values[2], rbReturnValue;

            values[0] = rbffi_NativeValue_ToRuby(m->type, m->rbType, ptr);
            values[1] = Qnil;
            

            rbReturnValue = rb_funcall2(m->rbConverter, id_from_native, 2, values);
            RB_GC_GUARD(values[0]);
            RB_GC_GUARD(rbType);
            
            return rbReturnValue;
        }
    
        default:
            rb_raise(rb_eRuntimeError, "Unknown type: %d", type->nativeType);
            return Qnil;
    }
}