Commit | Line | Data |
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6dc2ca62 MD |
1 | /* |
2 | * Common Trace Format | |
3 | * | |
4 | * Integers read/write functions. | |
5 | * | |
ccd7e1c8 | 6 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
6dc2ca62 | 7 | * |
ccd7e1c8 MD |
8 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
9 | * of this software and associated documentation files (the "Software"), to deal | |
10 | * in the Software without restriction, including without limitation the rights | |
11 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
12 | * copies of the Software, and to permit persons to whom the Software is | |
13 | * furnished to do so, subject to the following conditions: | |
de0ba614 | 14 | * |
ccd7e1c8 MD |
15 | * The above copyright notice and this permission notice shall be included in |
16 | * all copies or substantial portions of the Software. | |
6dc2ca62 MD |
17 | */ |
18 | ||
4c8bfb7e MD |
19 | #include <babeltrace/ctf/types.h> |
20 | #include <babeltrace/bitfield.h> | |
6dc2ca62 MD |
21 | #include <stdint.h> |
22 | #include <glib.h> | |
23 | #include <endian.h> | |
24 | ||
5385cf15 MD |
25 | /* |
26 | * The aligned read/write functions are expected to be faster than the | |
27 | * bitfield variants. They will be enabled eventually as an | |
28 | * optimisation. | |
29 | */ | |
30 | ||
7fe00194 | 31 | static |
c5e74408 MD |
32 | int _aligned_integer_read(struct stream_pos *ppos, |
33 | struct definition *definition) | |
6dc2ca62 | 34 | { |
d11e9c49 MD |
35 | struct definition_integer *integer_definition = |
36 | container_of(definition, struct definition_integer, p); | |
37 | const struct declaration_integer *integer_declaration = | |
38 | integer_definition->declaration; | |
46322b33 | 39 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
f6625916 | 40 | int rbo = (integer_declaration->byte_order != BYTE_ORDER); /* reverse byte order */ |
6dc2ca62 | 41 | |
46322b33 | 42 | ctf_align_pos(pos, integer_declaration->p.alignment); |
6dc2ca62 | 43 | |
c5e74408 MD |
44 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) |
45 | return -EFAULT; | |
46 | ||
670977d3 | 47 | assert(!(pos->offset % CHAR_BIT)); |
d11e9c49 MD |
48 | if (!integer_declaration->signedness) { |
49 | switch (integer_declaration->len) { | |
50 | case 8: | |
51 | { | |
52 | uint8_t v; | |
53 | ||
5385cf15 | 54 | v = *(const uint8_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
55 | integer_definition->value._unsigned = v; |
56 | break; | |
57 | } | |
58 | case 16: | |
59 | { | |
60 | uint16_t v; | |
61 | ||
5385cf15 | 62 | v = *(const uint16_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
63 | integer_definition->value._unsigned = |
64 | rbo ? GUINT16_SWAP_LE_BE(v) : v; | |
65 | break; | |
66 | } | |
67 | case 32: | |
68 | { | |
69 | uint32_t v; | |
70 | ||
5385cf15 | 71 | v = *(const uint32_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
72 | integer_definition->value._unsigned = |
73 | rbo ? GUINT32_SWAP_LE_BE(v) : v; | |
74 | break; | |
75 | } | |
76 | case 64: | |
77 | { | |
78 | uint64_t v; | |
79 | ||
5385cf15 | 80 | v = *(const uint64_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
81 | integer_definition->value._unsigned = |
82 | rbo ? GUINT64_SWAP_LE_BE(v) : v; | |
83 | break; | |
84 | } | |
85 | default: | |
86 | assert(0); | |
87 | } | |
88 | } else { | |
89 | switch (integer_declaration->len) { | |
90 | case 8: | |
91 | { | |
92 | int8_t v; | |
93 | ||
5385cf15 | 94 | v = *(const int8_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
95 | integer_definition->value._signed = v; |
96 | break; | |
97 | } | |
98 | case 16: | |
99 | { | |
100 | int16_t v; | |
101 | ||
5385cf15 | 102 | v = *(const int16_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
103 | integer_definition->value._signed = |
104 | rbo ? GUINT16_SWAP_LE_BE(v) : v; | |
105 | break; | |
106 | } | |
107 | case 32: | |
108 | { | |
109 | int32_t v; | |
110 | ||
5385cf15 | 111 | v = *(const int32_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
112 | integer_definition->value._signed = |
113 | rbo ? GUINT32_SWAP_LE_BE(v) : v; | |
114 | break; | |
115 | } | |
116 | case 64: | |
117 | { | |
118 | int64_t v; | |
119 | ||
5385cf15 | 120 | v = *(const int64_t *) ctf_get_pos_addr(pos); |
d11e9c49 MD |
121 | integer_definition->value._signed = |
122 | rbo ? GUINT64_SWAP_LE_BE(v) : v; | |
123 | break; | |
124 | } | |
125 | default: | |
126 | assert(0); | |
127 | } | |
6dc2ca62 | 128 | } |
d11e9c49 | 129 | ctf_move_pos(pos, integer_declaration->len); |
c5e74408 | 130 | return 0; |
6dc2ca62 MD |
131 | } |
132 | ||
7fe00194 | 133 | static |
c5e74408 | 134 | int _aligned_integer_write(struct stream_pos *ppos, |
d11e9c49 | 135 | struct definition *definition) |
6dc2ca62 | 136 | { |
d11e9c49 MD |
137 | struct definition_integer *integer_definition = |
138 | container_of(definition, struct definition_integer, p); | |
139 | const struct declaration_integer *integer_declaration = | |
140 | integer_definition->declaration; | |
46322b33 | 141 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
f6625916 | 142 | int rbo = (integer_declaration->byte_order != BYTE_ORDER); /* reverse byte order */ |
6dc2ca62 | 143 | |
46322b33 | 144 | ctf_align_pos(pos, integer_declaration->p.alignment); |
6dc2ca62 | 145 | |
c5e74408 MD |
146 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) |
147 | return -EFAULT; | |
148 | ||
670977d3 | 149 | assert(!(pos->offset % CHAR_BIT)); |
bed864a7 | 150 | if (pos->dummy) |
6dc2ca62 | 151 | goto end; |
d11e9c49 MD |
152 | if (!integer_declaration->signedness) { |
153 | uint64_t v = integer_definition->value._unsigned; | |
154 | ||
155 | switch (integer_declaration->len) { | |
156 | case 8: *(uint8_t *) ctf_get_pos_addr(pos) = (uint8_t) v; | |
157 | break; | |
158 | case 16: | |
159 | *(uint16_t *) ctf_get_pos_addr(pos) = rbo ? | |
160 | GUINT16_SWAP_LE_BE((uint16_t) v) : | |
161 | (uint16_t) v; | |
162 | break; | |
163 | case 32: | |
164 | *(uint32_t *) ctf_get_pos_addr(pos) = rbo ? | |
165 | GUINT32_SWAP_LE_BE((uint32_t) v) : | |
166 | (uint32_t) v; | |
167 | break; | |
168 | case 64: | |
169 | *(uint64_t *) ctf_get_pos_addr(pos) = rbo ? | |
170 | GUINT64_SWAP_LE_BE(v) : v; | |
171 | break; | |
172 | default: | |
173 | assert(0); | |
174 | } | |
175 | } else { | |
176 | int64_t v = integer_definition->value._signed; | |
177 | ||
178 | switch (integer_declaration->len) { | |
179 | case 8: *(int8_t *) ctf_get_pos_addr(pos) = (int8_t) v; | |
180 | break; | |
181 | case 16: | |
182 | *(int16_t *) ctf_get_pos_addr(pos) = rbo ? | |
183 | GUINT16_SWAP_LE_BE((int16_t) v) : | |
184 | (int16_t) v; | |
185 | break; | |
186 | case 32: | |
187 | *(int32_t *) ctf_get_pos_addr(pos) = rbo ? | |
188 | GUINT32_SWAP_LE_BE((int32_t) v) : | |
189 | (int32_t) v; | |
190 | break; | |
191 | case 64: | |
192 | *(int64_t *) ctf_get_pos_addr(pos) = rbo ? | |
193 | GUINT64_SWAP_LE_BE(v) : v; | |
194 | break; | |
195 | default: | |
196 | assert(0); | |
197 | } | |
6dc2ca62 MD |
198 | } |
199 | end: | |
46322b33 | 200 | ctf_move_pos(pos, integer_declaration->len); |
c5e74408 | 201 | return 0; |
6dc2ca62 MD |
202 | } |
203 | ||
c5e74408 | 204 | int ctf_integer_read(struct stream_pos *ppos, struct definition *definition) |
6dc2ca62 | 205 | { |
d11e9c49 MD |
206 | struct definition_integer *integer_definition = |
207 | container_of(definition, struct definition_integer, p); | |
208 | const struct declaration_integer *integer_declaration = | |
209 | integer_definition->declaration; | |
46322b33 | 210 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
6dc2ca62 | 211 | |
5385cf15 MD |
212 | if (!(integer_declaration->p.alignment % CHAR_BIT) |
213 | && !(integer_declaration->len % CHAR_BIT)) { | |
c5e74408 | 214 | return _aligned_integer_read(ppos, definition); |
5385cf15 MD |
215 | } |
216 | ||
46322b33 | 217 | ctf_align_pos(pos, integer_declaration->p.alignment); |
c5e74408 MD |
218 | |
219 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) | |
220 | return -EFAULT; | |
221 | ||
d11e9c49 MD |
222 | if (!integer_declaration->signedness) { |
223 | if (integer_declaration->byte_order == LITTLE_ENDIAN) | |
224 | bt_bitfield_read_le(pos->base, unsigned long, | |
225 | pos->offset, integer_declaration->len, | |
226 | &integer_definition->value._unsigned); | |
227 | else | |
228 | bt_bitfield_read_be(pos->base, unsigned long, | |
229 | pos->offset, integer_declaration->len, | |
230 | &integer_definition->value._unsigned); | |
231 | } else { | |
232 | if (integer_declaration->byte_order == LITTLE_ENDIAN) | |
233 | bt_bitfield_read_le(pos->base, unsigned long, | |
234 | pos->offset, integer_declaration->len, | |
235 | &integer_definition->value._signed); | |
236 | else | |
237 | bt_bitfield_read_be(pos->base, unsigned long, | |
238 | pos->offset, integer_declaration->len, | |
239 | &integer_definition->value._signed); | |
6dc2ca62 | 240 | } |
46322b33 | 241 | ctf_move_pos(pos, integer_declaration->len); |
c5e74408 | 242 | return 0; |
6dc2ca62 | 243 | } |
7fe00194 | 244 | |
c5e74408 | 245 | int ctf_integer_write(struct stream_pos *ppos, struct definition *definition) |
7fe00194 | 246 | { |
d11e9c49 MD |
247 | struct definition_integer *integer_definition = |
248 | container_of(definition, struct definition_integer, p); | |
249 | const struct declaration_integer *integer_declaration = | |
250 | integer_definition->declaration; | |
46322b33 MD |
251 | struct ctf_stream_pos *pos = ctf_pos(ppos); |
252 | ||
5385cf15 MD |
253 | if (!(integer_declaration->p.alignment % CHAR_BIT) |
254 | && !(integer_declaration->len % CHAR_BIT)) { | |
c5e74408 | 255 | return _aligned_integer_write(ppos, definition); |
5385cf15 MD |
256 | } |
257 | ||
46322b33 | 258 | ctf_align_pos(pos, integer_declaration->p.alignment); |
c5e74408 MD |
259 | |
260 | if (!ctf_pos_access_ok(pos, integer_declaration->len)) | |
261 | return -EFAULT; | |
262 | ||
7fe00194 MD |
263 | if (pos->dummy) |
264 | goto end; | |
d11e9c49 MD |
265 | if (!integer_declaration->signedness) { |
266 | if (integer_declaration->byte_order == LITTLE_ENDIAN) | |
267 | bt_bitfield_write_le(pos->base, unsigned long, | |
268 | pos->offset, integer_declaration->len, | |
269 | integer_definition->value._unsigned); | |
270 | else | |
271 | bt_bitfield_write_be(pos->base, unsigned long, | |
272 | pos->offset, integer_declaration->len, | |
273 | integer_definition->value._unsigned); | |
274 | } else { | |
275 | if (integer_declaration->byte_order == LITTLE_ENDIAN) | |
276 | bt_bitfield_write_le(pos->base, unsigned long, | |
277 | pos->offset, integer_declaration->len, | |
278 | integer_definition->value._signed); | |
279 | else | |
280 | bt_bitfield_write_be(pos->base, unsigned long, | |
281 | pos->offset, integer_declaration->len, | |
282 | integer_definition->value._signed); | |
283 | } | |
7fe00194 | 284 | end: |
46322b33 | 285 | ctf_move_pos(pos, integer_declaration->len); |
c5e74408 | 286 | return 0; |
7fe00194 | 287 | } |