Class: FFI::Type

Inherits:

Object

• Object
• FFI::Type

show all

Defined in:

ext/ffi_c/Type.c,
ext/ffi_c/Type.c

Overview

Defined Under Namespace

Classes: Builtin, Mapped

Constant Summary

Array =

FFI::Type::Array

Document-constant

Function =

rbffi_FunctionTypeClass

Struct =

rbffi_StructByValueClass

Instance Method Summary (collapse)

• - (Fixnum) alignment
• - (self) initialize(value) constructor
• - (String) inspect

  Inspect Type object.

• - (Fixnum) size

  Return type's size, in bytes.

63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82

# File 'ext/ffi_c/Type.c', line 63

static VALUE
type_initialize(VALUE self, VALUE value)
{
    Type* type;
    Type* other;

    Data_Get_Struct(self, Type, type);

    if (FIXNUM_P(value)) {
        type->nativeType = FIX2INT(value);
    } else if (rb_obj_is_kind_of(value, rbffi_TypeClass)) {
        Data_Get_Struct(value, Type, other);
        type->nativeType = other->nativeType;
        type->ffiType = other->ffiType;
    } else {
        rb_raise(rb_eArgError, "wrong type");
    }
    
    return self;
}

103
104
105
106
107
108
109
110
111

# File 'ext/ffi_c/Type.c', line 103

static VALUE
type_alignment(VALUE self)
{
    Type *type;

    Data_Get_Struct(self, Type, type);

    return INT2FIX(type->ffiType->alignment);
}

118
119
120
121
122
123
124
125
126
127
128
129
130

# File 'ext/ffi_c/Type.c', line 118

static VALUE
type_inspect(VALUE self)
{
    char buf[100];
    Type *type;

    Data_Get_Struct(self, Type, type);

    snprintf(buf, sizeof(buf), "#<%s:%p size=%d alignment=%d>",
            rb_obj_classname(self), type, (int) type->ffiType->size, (int) type->ffiType->alignment);

    return rb_str_new2(buf);
}

89
90
91
92
93
94
95
96
97

# File 'ext/ffi_c/Type.c', line 89

static VALUE
type_size(VALUE self)
{
    Type *type;

    Data_Get_Struct(self, Type, type);

    return INT2FIX(type->ffiType->size);
}