1 |
747 |
jeremybenn |
/* go-type.h -- basic information for a Go type.
|
2 |
|
|
|
3 |
|
|
Copyright 2009 The Go Authors. All rights reserved.
|
4 |
|
|
Use of this source code is governed by a BSD-style
|
5 |
|
|
license that can be found in the LICENSE file. */
|
6 |
|
|
|
7 |
|
|
#ifndef LIBGO_GO_TYPE_H
|
8 |
|
|
#define LIBGO_GO_TYPE_H
|
9 |
|
|
|
10 |
|
|
#include <stddef.h>
|
11 |
|
|
#include <stdint.h>
|
12 |
|
|
|
13 |
|
|
#include "go-string.h"
|
14 |
|
|
#include "array.h"
|
15 |
|
|
|
16 |
|
|
/* Many of the types in this file must match the data structures
|
17 |
|
|
generated by the compiler, and must also match the Go types which
|
18 |
|
|
appear in go/runtime/type.go and go/reflect/type.go. */
|
19 |
|
|
|
20 |
|
|
/* Type kinds. These are used to get the type descriptor to use for
|
21 |
|
|
the type itself, when using unsafe.Typeof or unsafe.Reflect. The
|
22 |
|
|
values here must match the values generated by the compiler (the
|
23 |
|
|
RUNTIME_TYPE_KIND_xxx values in gcc/go/types.h). These are macros
|
24 |
|
|
rather than an enum to make it easy to change values in the future
|
25 |
|
|
and hard to get confused about it.
|
26 |
|
|
|
27 |
|
|
These correspond to the kind values used by the gc compiler. */
|
28 |
|
|
|
29 |
|
|
#define GO_BOOL 1
|
30 |
|
|
#define GO_INT 2
|
31 |
|
|
#define GO_INT8 3
|
32 |
|
|
#define GO_INT16 4
|
33 |
|
|
#define GO_INT32 5
|
34 |
|
|
#define GO_INT64 6
|
35 |
|
|
#define GO_UINT 7
|
36 |
|
|
#define GO_UINT8 8
|
37 |
|
|
#define GO_UINT16 9
|
38 |
|
|
#define GO_UINT32 10
|
39 |
|
|
#define GO_UINT64 11
|
40 |
|
|
#define GO_UINTPTR 12
|
41 |
|
|
#define GO_FLOAT32 13
|
42 |
|
|
#define GO_FLOAT64 14
|
43 |
|
|
#define GO_COMPLEX64 15
|
44 |
|
|
#define GO_COMPLEX128 16
|
45 |
|
|
#define GO_ARRAY 17
|
46 |
|
|
#define GO_CHAN 18
|
47 |
|
|
#define GO_FUNC 19
|
48 |
|
|
#define GO_INTERFACE 20
|
49 |
|
|
#define GO_MAP 21
|
50 |
|
|
#define GO_PTR 22
|
51 |
|
|
#define GO_SLICE 23
|
52 |
|
|
#define GO_STRING 24
|
53 |
|
|
#define GO_STRUCT 25
|
54 |
|
|
#define GO_UNSAFE_POINTER 26
|
55 |
|
|
|
56 |
|
|
#define GO_NO_POINTERS (1 << 7)
|
57 |
|
|
|
58 |
|
|
#define GO_CODE_MASK 0x7f
|
59 |
|
|
|
60 |
|
|
/* For each Go type the compiler constructs one of these structures.
|
61 |
|
|
This is used for type reflectin, interfaces, maps, and reference
|
62 |
|
|
counting. */
|
63 |
|
|
|
64 |
|
|
struct __go_type_descriptor
|
65 |
|
|
{
|
66 |
|
|
/* The type code for this type, one of the type kind values above.
|
67 |
|
|
This is used by unsafe.Reflect and unsafe.Typeof to determine the
|
68 |
|
|
type descriptor to return for this type itself. It is also used
|
69 |
|
|
by reflect.toType when mapping to a reflect Type structure. */
|
70 |
|
|
unsigned char __code;
|
71 |
|
|
|
72 |
|
|
/* The alignment in bytes of a variable with this type. */
|
73 |
|
|
unsigned char __align;
|
74 |
|
|
|
75 |
|
|
/* The alignment in bytes of a struct field with this type. */
|
76 |
|
|
unsigned char __field_align;
|
77 |
|
|
|
78 |
|
|
/* The size in bytes of a value of this type. Note that all types
|
79 |
|
|
in Go have a fixed size. */
|
80 |
|
|
uintptr_t __size;
|
81 |
|
|
|
82 |
|
|
/* The type's hash code. */
|
83 |
|
|
uint32_t __hash;
|
84 |
|
|
|
85 |
|
|
/* This function takes a pointer to a value of this type, and the
|
86 |
|
|
size of this type, and returns a hash code. We pass the size
|
87 |
|
|
explicitly becaues it means that we can share a single instance
|
88 |
|
|
of this function for various different types. */
|
89 |
|
|
uintptr_t (*__hashfn) (const void *, uintptr_t);
|
90 |
|
|
|
91 |
|
|
/* This function takes two pointers to values of this type, and the
|
92 |
|
|
size of this type, and returns whether the values are equal. */
|
93 |
|
|
_Bool (*__equalfn) (const void *, const void *, uintptr_t);
|
94 |
|
|
|
95 |
|
|
/* A string describing this type. This is only used for
|
96 |
|
|
debugging. */
|
97 |
|
|
const struct __go_string *__reflection;
|
98 |
|
|
|
99 |
|
|
/* A pointer to fields which are only used for some types. */
|
100 |
|
|
const struct __go_uncommon_type *__uncommon;
|
101 |
|
|
|
102 |
|
|
/* The descriptor for the type which is a pointer to this type.
|
103 |
|
|
This may be NULL. */
|
104 |
|
|
const struct __go_type_descriptor *__pointer_to_this;
|
105 |
|
|
};
|
106 |
|
|
|
107 |
|
|
/* The information we store for each method of a type. */
|
108 |
|
|
|
109 |
|
|
struct __go_method
|
110 |
|
|
{
|
111 |
|
|
/* The name of the method. */
|
112 |
|
|
const struct __go_string *__name;
|
113 |
|
|
|
114 |
|
|
/* This is NULL for an exported method, or the name of the package
|
115 |
|
|
where it lives. */
|
116 |
|
|
const struct __go_string *__pkg_path;
|
117 |
|
|
|
118 |
|
|
/* The type of the method, without the receiver. This will be a
|
119 |
|
|
function type. */
|
120 |
|
|
const struct __go_type_descriptor *__mtype;
|
121 |
|
|
|
122 |
|
|
/* The type of the method, with the receiver. This will be a
|
123 |
|
|
function type. */
|
124 |
|
|
const struct __go_type_descriptor *__type;
|
125 |
|
|
|
126 |
|
|
/* A pointer to the code which implements the method. This is
|
127 |
|
|
really a function pointer. */
|
128 |
|
|
const void *__function;
|
129 |
|
|
};
|
130 |
|
|
|
131 |
|
|
/* Additional information that we keep for named types and for types
|
132 |
|
|
with methods. */
|
133 |
|
|
|
134 |
|
|
struct __go_uncommon_type
|
135 |
|
|
{
|
136 |
|
|
/* The name of the type. */
|
137 |
|
|
const struct __go_string *__name;
|
138 |
|
|
|
139 |
|
|
/* The type's package. This is NULL for builtin types. */
|
140 |
|
|
const struct __go_string *__pkg_path;
|
141 |
|
|
|
142 |
|
|
/* The type's methods. This is an array of struct __go_method. */
|
143 |
|
|
struct __go_open_array __methods;
|
144 |
|
|
};
|
145 |
|
|
|
146 |
|
|
/* The type descriptor for a fixed array type. */
|
147 |
|
|
|
148 |
|
|
struct __go_array_type
|
149 |
|
|
{
|
150 |
|
|
/* Starts like all type descriptors. */
|
151 |
|
|
struct __go_type_descriptor __common;
|
152 |
|
|
|
153 |
|
|
/* The element type. */
|
154 |
|
|
struct __go_type_descriptor *__element_type;
|
155 |
|
|
|
156 |
|
|
/* The type of a slice of the same element type. */
|
157 |
|
|
struct __go_type_descriptor *__slice_type;
|
158 |
|
|
|
159 |
|
|
/* The length of the array. */
|
160 |
|
|
uintptr_t __len;
|
161 |
|
|
};
|
162 |
|
|
|
163 |
|
|
/* The type descriptor for a slice. */
|
164 |
|
|
|
165 |
|
|
struct __go_slice_type
|
166 |
|
|
{
|
167 |
|
|
/* Starts like all other type descriptors. */
|
168 |
|
|
struct __go_type_descriptor __common;
|
169 |
|
|
|
170 |
|
|
/* The element type. */
|
171 |
|
|
struct __go_type_descriptor *__element_type;
|
172 |
|
|
};
|
173 |
|
|
|
174 |
|
|
/* The direction of a channel. */
|
175 |
|
|
#define CHANNEL_RECV_DIR 1
|
176 |
|
|
#define CHANNEL_SEND_DIR 2
|
177 |
|
|
#define CHANNEL_BOTH_DIR (CHANNEL_RECV_DIR | CHANNEL_SEND_DIR)
|
178 |
|
|
|
179 |
|
|
/* The type descriptor for a channel. */
|
180 |
|
|
|
181 |
|
|
struct __go_channel_type
|
182 |
|
|
{
|
183 |
|
|
/* Starts like all other type descriptors. */
|
184 |
|
|
struct __go_type_descriptor __common;
|
185 |
|
|
|
186 |
|
|
/* The element type. */
|
187 |
|
|
const struct __go_type_descriptor *__element_type;
|
188 |
|
|
|
189 |
|
|
/* The direction. */
|
190 |
|
|
uintptr_t __dir;
|
191 |
|
|
};
|
192 |
|
|
|
193 |
|
|
/* The type descriptor for a function. */
|
194 |
|
|
|
195 |
|
|
struct __go_func_type
|
196 |
|
|
{
|
197 |
|
|
/* Starts like all other type descriptors. */
|
198 |
|
|
struct __go_type_descriptor __common;
|
199 |
|
|
|
200 |
|
|
/* Whether this is a varargs function. If this is true, there will
|
201 |
|
|
be at least one parameter. For "..." the last parameter type is
|
202 |
|
|
"interface{}". For "... T" the last parameter type is "[]T". */
|
203 |
|
|
_Bool __dotdotdot;
|
204 |
|
|
|
205 |
|
|
/* The input parameter types. This is an array of pointers to
|
206 |
|
|
struct __go_type_descriptor. */
|
207 |
|
|
struct __go_open_array __in;
|
208 |
|
|
|
209 |
|
|
/* The output parameter types. This is an array of pointers to
|
210 |
|
|
struct __go_type_descriptor. */
|
211 |
|
|
struct __go_open_array __out;
|
212 |
|
|
};
|
213 |
|
|
|
214 |
|
|
/* A method on an interface type. */
|
215 |
|
|
|
216 |
|
|
struct __go_interface_method
|
217 |
|
|
{
|
218 |
|
|
/* The name of the method. */
|
219 |
|
|
const struct __go_string *__name;
|
220 |
|
|
|
221 |
|
|
/* This is NULL for an exported method, or the name of the package
|
222 |
|
|
where it lives. */
|
223 |
|
|
const struct __go_string *__pkg_path;
|
224 |
|
|
|
225 |
|
|
/* The real type of the method. */
|
226 |
|
|
struct __go_type_descriptor *__type;
|
227 |
|
|
};
|
228 |
|
|
|
229 |
|
|
/* An interface type. */
|
230 |
|
|
|
231 |
|
|
struct __go_interface_type
|
232 |
|
|
{
|
233 |
|
|
/* Starts like all other type descriptors. */
|
234 |
|
|
struct __go_type_descriptor __common;
|
235 |
|
|
|
236 |
|
|
/* Array of __go_interface_method . The methods are sorted in the
|
237 |
|
|
same order that they appear in the definition of the
|
238 |
|
|
interface. */
|
239 |
|
|
struct __go_open_array __methods;
|
240 |
|
|
};
|
241 |
|
|
|
242 |
|
|
/* A map type. */
|
243 |
|
|
|
244 |
|
|
struct __go_map_type
|
245 |
|
|
{
|
246 |
|
|
/* Starts like all other type descriptors. */
|
247 |
|
|
struct __go_type_descriptor __common;
|
248 |
|
|
|
249 |
|
|
/* The map key type. */
|
250 |
|
|
const struct __go_type_descriptor *__key_type;
|
251 |
|
|
|
252 |
|
|
/* The map value type. */
|
253 |
|
|
const struct __go_type_descriptor *__val_type;
|
254 |
|
|
};
|
255 |
|
|
|
256 |
|
|
/* A pointer type. */
|
257 |
|
|
|
258 |
|
|
struct __go_ptr_type
|
259 |
|
|
{
|
260 |
|
|
/* Starts like all other type descriptors. */
|
261 |
|
|
struct __go_type_descriptor __common;
|
262 |
|
|
|
263 |
|
|
/* The type to which this points. */
|
264 |
|
|
const struct __go_type_descriptor *__element_type;
|
265 |
|
|
};
|
266 |
|
|
|
267 |
|
|
/* A field in a structure. */
|
268 |
|
|
|
269 |
|
|
struct __go_struct_field
|
270 |
|
|
{
|
271 |
|
|
/* The name of the field--NULL for an anonymous field. */
|
272 |
|
|
const struct __go_string *__name;
|
273 |
|
|
|
274 |
|
|
/* This is NULL for an exported method, or the name of the package
|
275 |
|
|
where it lives. */
|
276 |
|
|
const struct __go_string *__pkg_path;
|
277 |
|
|
|
278 |
|
|
/* The type of the field. */
|
279 |
|
|
const struct __go_type_descriptor *__type;
|
280 |
|
|
|
281 |
|
|
/* The field tag, or NULL. */
|
282 |
|
|
const struct __go_string *__tag;
|
283 |
|
|
|
284 |
|
|
/* The offset of the field in the struct. */
|
285 |
|
|
uintptr_t __offset;
|
286 |
|
|
};
|
287 |
|
|
|
288 |
|
|
/* A struct type. */
|
289 |
|
|
|
290 |
|
|
struct __go_struct_type
|
291 |
|
|
{
|
292 |
|
|
/* Starts like all other type descriptors. */
|
293 |
|
|
struct __go_type_descriptor __common;
|
294 |
|
|
|
295 |
|
|
/* An array of struct __go_struct_field. */
|
296 |
|
|
struct __go_open_array __fields;
|
297 |
|
|
};
|
298 |
|
|
|
299 |
|
|
/* If an empty interface has these bits set in its type pointer, it
|
300 |
|
|
was copied from a reflect.Value and is not a valid empty
|
301 |
|
|
interface. */
|
302 |
|
|
|
303 |
|
|
enum
|
304 |
|
|
{
|
305 |
|
|
reflectFlags = 3,
|
306 |
|
|
};
|
307 |
|
|
|
308 |
|
|
/* Whether a type descriptor is a pointer. */
|
309 |
|
|
|
310 |
|
|
static inline _Bool
|
311 |
|
|
__go_is_pointer_type (const struct __go_type_descriptor *td)
|
312 |
|
|
{
|
313 |
|
|
return td->__code == GO_PTR || td->__code == GO_UNSAFE_POINTER;
|
314 |
|
|
}
|
315 |
|
|
|
316 |
|
|
extern _Bool
|
317 |
|
|
__go_type_descriptors_equal(const struct __go_type_descriptor*,
|
318 |
|
|
const struct __go_type_descriptor*);
|
319 |
|
|
|
320 |
|
|
extern uintptr_t __go_type_hash_identity (const void *, uintptr_t);
|
321 |
|
|
extern _Bool __go_type_equal_identity (const void *, const void *, uintptr_t);
|
322 |
|
|
extern uintptr_t __go_type_hash_string (const void *, uintptr_t);
|
323 |
|
|
extern _Bool __go_type_equal_string (const void *, const void *, uintptr_t);
|
324 |
|
|
extern uintptr_t __go_type_hash_float (const void *, uintptr_t);
|
325 |
|
|
extern _Bool __go_type_equal_float (const void *, const void *, uintptr_t);
|
326 |
|
|
extern uintptr_t __go_type_hash_complex (const void *, uintptr_t);
|
327 |
|
|
extern _Bool __go_type_equal_complex (const void *, const void *, uintptr_t);
|
328 |
|
|
extern uintptr_t __go_type_hash_interface (const void *, uintptr_t);
|
329 |
|
|
extern _Bool __go_type_equal_interface (const void *, const void *, uintptr_t);
|
330 |
|
|
extern uintptr_t __go_type_hash_error (const void *, uintptr_t);
|
331 |
|
|
extern _Bool __go_type_equal_error (const void *, const void *, uintptr_t);
|
332 |
|
|
|
333 |
|
|
#endif /* !defined(LIBGO_GO_TYPE_H) */
|