1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2010 Joshua Haberman. See LICENSE for details.
*
* Data structure for storing a message of protobuf data.
*/
#ifndef UPB_MSG_H
#define UPB_MSG_H
#include "upb.h"
#include "upb_def.h"
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
upb_value upb_field_tryrecycle(upb_valueptr p, upb_value v, upb_fielddef *f,
upb_valuetype_t type);
INLINE void _upb_value_ref(upb_value v) { upb_atomic_ref(v.refcount); }
void _upb_field_free(upb_value v, upb_fielddef *f);
void _upb_elem_free(upb_value v, upb_fielddef *f);
INLINE void _upb_field_unref(upb_value v, upb_fielddef *f) {
assert(upb_field_ismm(f));
if (v.refcount && upb_atomic_unref(v.refcount))
_upb_field_free(v, f);
}
INLINE void _upb_elem_unref(upb_value v, upb_fielddef *f) {
assert(upb_elem_ismm(f));
if (v.refcount && upb_atomic_unref(v.refcount))
_upb_elem_free(v, f);
}
/* upb_array ******************************************************************/
typedef uint32_t upb_arraylen_t;
struct _upb_array {
upb_atomic_refcount_t refcount;
upb_arraylen_t len;
upb_arraylen_t size;
upb_valueptr elements;
};
upb_array *upb_array_new(void);
INLINE uint32_t upb_array_len(upb_array *a) {
return a->len;
}
void _upb_array_free(upb_array *a, upb_fielddef *f);
INLINE void upb_array_unref(upb_array *a, upb_fielddef *f) {
if (upb_atomic_unref(&a->refcount)) _upb_array_free(a, f);
}
INLINE upb_valueptr _upb_array_getptr(upb_array *a, upb_fielddef *f,
uint32_t elem) {
upb_valueptr p;
p._void = &a->elements.uint8[elem * upb_types[f->type].size];
return p;
}
INLINE upb_value upb_array_get(upb_array *a, upb_fielddef *f, uint32_t elem) {
assert(elem < upb_array_len(a));
return upb_value_read(_upb_array_getptr(a, f, elem), f->type);
}
// For string or submessages, will release a ref on the previously set value.
// and take a ref on the new value. The array must already be at least "elem"
// long; to append use append_mutable.
INLINE void upb_array_set(upb_array *a, upb_fielddef *f, uint32_t elem,
upb_value val) {
assert(elem < upb_array_len(a));
upb_valueptr p = _upb_array_getptr(a, f, elem);
if (upb_elem_ismm(f)) {
_upb_elem_unref(upb_value_read(p, f->type), f);
_upb_value_ref(val);
}
upb_value_write(p, val, f->type);
}
INLINE void upb_array_resize(upb_array *a, upb_fielddef *f) {
if (a->len == a->size) {
a->len *= 2;
a->elements._void = realloc(a->elements._void,
a->len * upb_types[f->type].size);
}
}
// Append an element to an array of string or submsg with the default value,
// returning it. This will try to reuse previously allocated memory.
INLINE upb_value upb_array_appendmutable(upb_array *a, upb_fielddef *f) {
assert(upb_elem_ismm(f));
upb_array_resize(a, f);
upb_valueptr p = _upb_array_getptr(a, f, a->len++);
upb_valuetype_t type = upb_elem_valuetype(f);
upb_value val = upb_value_read(p, type);
val = upb_field_tryrecycle(p, val, f, type);
return val;
}
/* upb_msg ********************************************************************/
struct _upb_msg {
upb_atomic_refcount_t refcount;
uint8_t data[4]; // We allocate the appropriate amount per message.
};
// Creates a new msg of the given type.
upb_msg *upb_msg_new(upb_msgdef *md);
// Returns a pointer to the given field.
INLINE upb_valueptr _upb_msg_getptr(upb_msg *msg, upb_fielddef *f) {
upb_valueptr p;
p._void = &msg->data[f->byte_offset];
return p;
}
void _upb_msg_free(upb_msg *msg, upb_msgdef *md);
INLINE void upb_msg_unref(upb_msg *msg, upb_msgdef *md) {
if (upb_atomic_unref(&msg->refcount)) _upb_msg_free(msg, md);
}
// Tests whether the given field is explicitly set, or whether it will return a
// default.
INLINE bool upb_msg_has(upb_msg *msg, upb_fielddef *f) {
return (msg->data[f->field_index/8] & (1 << (f->field_index % 8))) != 0;
}
INLINE void upb_msg_sethas(upb_msg *msg, upb_fielddef *f) {
msg->data[f->field_index/8] |= (1 << (f->field_index % 8));
}
// Returns the current value of the given field if set, or the default value if
// not set.
INLINE upb_value upb_msg_get(upb_msg *msg, upb_fielddef *f) {
if (upb_msg_has(msg, f)) {
return upb_value_read(_upb_msg_getptr(msg, f), f->type);
} else {
return f->default_value;
}
}
// If the given string, submessage, or array is already set, returns it.
// Otherwise sets it and returns an empty instance, attempting to reuse any
// previously allocated memory.
INLINE upb_value upb_msg_getmutable(upb_msg *msg, upb_fielddef *f) {
assert(upb_field_ismm(f));
upb_valueptr p = _upb_msg_getptr(msg, f);
upb_valuetype_t type = upb_field_valuetype(f);
upb_value val = upb_value_read(p, type);
if (!upb_msg_has(msg, f)) {
upb_msg_sethas(msg, f);
val = upb_field_tryrecycle(p, val, f, type);
}
return val;
}
// Sets the current value of the field. If this is a string, array, or
// submessage field, releases a ref on the value (if any) that was previously
// set.
INLINE void upb_msg_set(upb_msg *msg, upb_fielddef *f, upb_value val) {
upb_valueptr p = _upb_msg_getptr(msg, f);
upb_valuetype_t type = upb_field_valuetype(f);
if (upb_field_ismm(f)) {
_upb_field_unref(upb_value_read(p, type), f);
_upb_value_ref(val);
}
upb_msg_sethas(msg, f);
upb_value_write(p, val, upb_field_valuetype(f));
}
// Unsets all field values back to their defaults.
INLINE void upb_msg_clear(upb_msg *msg, upb_msgdef *md) {
memset(msg->data, 0, md->set_flags_bytes);
}
// A convenience function for decoding an entire protobuf all at once, without
// having to worry about setting up the appropriate objects.
void upb_msg_decodestr(upb_msg *msg, upb_msgdef *md, upb_string *str,
upb_status *status);
// A convenience function for encoding an entire protobuf all at once. If an
// error occurs, the null string is returned and the status object contains
// the error.
void upb_msg_encodestr(upb_msg *msg, upb_msgdef *md, upb_string *str,
upb_status *status);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
|
