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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
use crate::{pg_sys, PgBox};
pub unsafe fn set_varsize(ptr: *mut pg_sys::varlena, len: i32) {
extern "C" {
fn pgx_SET_VARSIZE(ptr: *mut pg_sys::varlena, len: i32);
}
pgx_SET_VARSIZE(ptr, len)
}
pub unsafe fn set_varsize_short(ptr: *mut pg_sys::varlena, len: i32) {
extern "C" {
fn pgx_SET_VARSIZE_SHORT(ptr: *mut pg_sys::varlena, len: i32);
}
pgx_SET_VARSIZE_SHORT(ptr, len)
}
#[inline]
pub unsafe fn varsize_external(ptr: *const pg_sys::varlena) -> usize {
pg_sys::VARHDRSZ_EXTERNAL() + vartag_size(vartag_external(ptr) as pg_sys::vartag_external)
}
#[inline]
pub unsafe fn vartag_external(ptr: *const pg_sys::varlena) -> u8 {
vartag_1b_e(ptr)
}
#[inline]
pub unsafe fn vartag_is_expanded(tag: pg_sys::vartag_external) -> bool {
(tag & !1) == pg_sys::vartag_external_VARTAG_EXPANDED_RO
}
#[inline]
pub unsafe fn vartag_size(tag: pg_sys::vartag_external) -> usize {
if tag == pg_sys::vartag_external_VARTAG_INDIRECT {
std::mem::size_of::<pg_sys::varatt_indirect>()
} else if vartag_is_expanded(tag) {
std::mem::size_of::<pg_sys::varatt_expanded>()
} else if tag == pg_sys::vartag_external_VARTAG_ONDISK {
std::mem::size_of::<pg_sys::varatt_external>()
} else {
panic!("unrecognized TOAST vartag")
}
}
#[allow(clippy::cast_ptr_alignment)]
#[inline]
pub unsafe fn varsize_4b(ptr: *const pg_sys::varlena) -> usize {
let va4b = ptr as *const pg_sys::varattrib_4b__bindgen_ty_1;
(((*va4b).va_header >> 2) & 0x3FFF_FFFF) as usize
}
#[inline]
pub unsafe fn varsize_1b(ptr: *const pg_sys::varlena) -> usize {
let va1b = ptr as *const pg_sys::varattrib_1b;
(((*va1b).va_header >> 1) & 0x7F) as usize
}
#[inline]
pub unsafe fn vartag_1b_e(ptr: *const pg_sys::varlena) -> u8 {
let va1be = ptr as *const pg_sys::varattrib_1b_e;
(*va1be).va_tag
}
#[inline]
pub unsafe fn varsize(ptr: *const pg_sys::varlena) -> usize {
varsize_4b(ptr)
}
#[inline]
pub unsafe fn varatt_is_4b(ptr: *const pg_sys::varlena) -> bool {
let va1b = ptr as *const pg_sys::varattrib_1b;
(*va1b).va_header & 0x01 == 0x00
}
#[allow(clippy::verbose_bit_mask)]
#[inline]
pub unsafe fn varatt_is_4b_u(ptr: *const pg_sys::varlena) -> bool {
let va1b = ptr as *const pg_sys::varattrib_1b;
(*va1b).va_header & 0x03 == 0x00
}
#[inline]
pub unsafe fn varatt_is_b8_c(ptr: *const pg_sys::varlena) -> bool {
let va1b = ptr as *const pg_sys::varattrib_1b;
(*va1b).va_header & 0x03 == 0x02
}
#[inline]
pub unsafe fn varatt_is_1b(ptr: *const pg_sys::varlena) -> bool {
let va1b = ptr as *const pg_sys::varattrib_1b;
(*va1b).va_header & 0x01 == 0x01
}
#[inline]
pub unsafe fn varatt_is_1b_e(ptr: *const pg_sys::varlena) -> bool {
let va1b = ptr as *const pg_sys::varattrib_1b;
(*va1b).va_header == 0x01
}
#[inline]
pub unsafe fn varatt_not_pad_byte(ptr: *const pg_sys::varlena) -> bool {
!ptr.is_null()
}
#[inline]
pub unsafe fn varsize_any(ptr: *const pg_sys::varlena) -> usize {
if varatt_is_1b_e(ptr) {
varsize_external(ptr)
} else if varatt_is_1b(ptr) {
varsize_1b(ptr)
} else {
varsize_4b(ptr)
}
}
#[inline]
pub unsafe fn varsize_any_exhdr(ptr: *const pg_sys::varlena) -> usize {
if varatt_is_1b_e(ptr) {
varsize_external(ptr) - pg_sys::VARHDRSZ_EXTERNAL()
} else if varatt_is_1b(ptr) {
varsize_1b(ptr) - pg_sys::VARHDRSZ_SHORT()
} else {
varsize_4b(ptr) - pg_sys::VARHDRSZ
}
}
#[inline]
pub unsafe fn vardata_1b(ptr: *const pg_sys::varlena) -> *const std::os::raw::c_char {
let va1b = ptr as *const pg_sys::varattrib_1b;
(*va1b)
.va_data
.as_slice(varsize_1b(ptr as *const pg_sys::varlena) as usize)
.as_ptr() as *const std::os::raw::c_char
}
#[allow(clippy::cast_ptr_alignment)]
#[inline]
pub unsafe fn vardata_4b(ptr: *const pg_sys::varlena) -> *const std::os::raw::c_char {
let va1b = ptr as *const pg_sys::varattrib_4b__bindgen_ty_1;
(*va1b)
.va_data
.as_slice(varsize_1b(ptr as *const pg_sys::varlena) as usize)
.as_ptr() as *const std::os::raw::c_char
}
#[allow(clippy::cast_ptr_alignment)]
#[inline]
pub unsafe fn vardata_4b_c(ptr: *const pg_sys::varlena) -> *const std::os::raw::c_char {
let va1b = ptr as *const pg_sys::varattrib_4b__bindgen_ty_2;
(*va1b)
.va_data
.as_slice(varsize_1b(ptr as *const pg_sys::varlena) as usize)
.as_ptr() as *const std::os::raw::c_char
}
#[allow(clippy::cast_ptr_alignment)]
#[inline]
pub unsafe fn vardata_1b_e(ptr: *const pg_sys::varlena) -> *const std::os::raw::c_char {
let va1b = ptr as *const pg_sys::varattrib_1b_e;
(*va1b)
.va_data
.as_slice(varsize_1b(ptr as *const pg_sys::varlena) as usize)
.as_ptr() as *const std::os::raw::c_char
}
#[inline]
pub unsafe fn vardata_any(ptr: *const pg_sys::varlena) -> *const std::os::raw::c_char {
if varatt_is_1b(ptr) {
vardata_1b(ptr)
} else {
vardata_4b(ptr)
}
}
#[inline]
pub unsafe fn varlena_size(t: *const pg_sys::varlena) -> usize {
std::mem::size_of_val(&(*t).vl_len_) + varsize_any_exhdr(t)
}
#[inline]
pub unsafe fn text_to_rust_str_unchecked<'a>(varlena: *const pg_sys::varlena) -> &'a str {
let len = varsize_any_exhdr(varlena);
let data = vardata_any(varlena);
std::str::from_utf8_unchecked(std::slice::from_raw_parts(data as *mut u8, len))
}
#[inline]
pub unsafe fn varlena_to_byte_slice<'a>(varlena: *const pg_sys::varlena) -> &'a [u8] {
let len = varsize_any_exhdr(varlena);
let data = vardata_any(varlena);
std::slice::from_raw_parts(data as *const u8, len)
}
#[inline]
pub fn rust_str_to_text_p(s: &str) -> PgBox<pg_sys::varlena> {
let bytea = rust_byte_slice_to_bytea(s.as_bytes());
PgBox::from_pg(bytea.as_ptr() as *mut pg_sys::varlena)
}
#[inline]
pub fn rust_byte_slice_to_bytea(slice: &[u8]) -> PgBox<pg_sys::bytea> {
let len = slice.len();
let ptr = slice.as_ptr();
PgBox::from_pg(unsafe {
pg_sys::cstring_to_text_with_len(ptr as *const std::os::raw::c_char, len as i32)
})
}