File: | src/lib/libc/db/btree/bt_conv.c |
Warning: | line 205, column 2 Value stored to 'p' is never read |
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1 | /* $OpenBSD: bt_conv.c,v 1.10 2015/01/16 16:48:51 deraadt Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 1990, 1993, 1994 |
5 | * The Regents of the University of California. All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to Berkeley by |
8 | * Mike Olson. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * 3. Neither the name of the University nor the names of its contributors |
19 | * may be used to endorse or promote products derived from this software |
20 | * without specific prior written permission. |
21 | * |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
32 | * SUCH DAMAGE. |
33 | */ |
34 | |
35 | #include <stdio.h> |
36 | |
37 | #include <db.h> |
38 | #include "btree.h" |
39 | |
40 | static void mswap(PAGE *); |
41 | |
42 | /* |
43 | * __BT_BPGIN, __BT_BPGOUT -- |
44 | * Convert host-specific number layout to/from the host-independent |
45 | * format stored on disk. |
46 | * |
47 | * Parameters: |
48 | * t: tree |
49 | * pg: page number |
50 | * h: page to convert |
51 | */ |
52 | void |
53 | __bt_pgin(void *t, pgno_t pg, void *pp) |
54 | { |
55 | PAGE *h; |
56 | indx_t i, top; |
57 | u_char flags; |
58 | char *p; |
59 | |
60 | if (!F_ISSET(((BTREE *)t), B_NEEDSWAP)((((BTREE *)t))->flags & (0x00008))) |
61 | return; |
62 | if (pg == P_META0) { |
63 | mswap(pp); |
64 | return; |
65 | } |
66 | |
67 | h = pp; |
68 | M_32_SWAP(h->pgno){ u_int32_t _tmp = h->pgno; ((char *)&h->pgno)[0] = ((char *)&_tmp)[3]; ((char *)&h->pgno)[1] = ((char *)&_tmp)[2]; ((char *)&h->pgno)[2] = ((char *)& _tmp)[1]; ((char *)&h->pgno)[3] = ((char *)&_tmp)[ 0]; }; |
69 | M_32_SWAP(h->prevpg){ u_int32_t _tmp = h->prevpg; ((char *)&h->prevpg)[ 0] = ((char *)&_tmp)[3]; ((char *)&h->prevpg)[1] = ((char *)&_tmp)[2]; ((char *)&h->prevpg)[2] = ((char *)&_tmp)[1]; ((char *)&h->prevpg)[3] = ((char *)& _tmp)[0]; }; |
70 | M_32_SWAP(h->nextpg){ u_int32_t _tmp = h->nextpg; ((char *)&h->nextpg)[ 0] = ((char *)&_tmp)[3]; ((char *)&h->nextpg)[1] = ((char *)&_tmp)[2]; ((char *)&h->nextpg)[2] = ((char *)&_tmp)[1]; ((char *)&h->nextpg)[3] = ((char *)& _tmp)[0]; }; |
71 | M_32_SWAP(h->flags){ u_int32_t _tmp = h->flags; ((char *)&h->flags)[0] = ((char *)&_tmp)[3]; ((char *)&h->flags)[1] = (( char *)&_tmp)[2]; ((char *)&h->flags)[2] = ((char * )&_tmp)[1]; ((char *)&h->flags)[3] = ((char *)& _tmp)[0]; }; |
72 | M_16_SWAP(h->lower){ u_int16_t _tmp = h->lower; ((char *)&h->lower)[0] = ((char *)&_tmp)[1]; ((char *)&h->lower)[1] = (( char *)&_tmp)[0]; }; |
73 | M_16_SWAP(h->upper){ u_int16_t _tmp = h->upper; ((char *)&h->upper)[0] = ((char *)&_tmp)[1]; ((char *)&h->upper)[1] = (( char *)&_tmp)[0]; }; |
74 | |
75 | top = NEXTINDEX(h)(((h)->lower - (sizeof(pgno_t) + sizeof(pgno_t) + sizeof(pgno_t ) + sizeof(u_int32_t) + sizeof(indx_t) + sizeof(indx_t))) / sizeof (indx_t)); |
76 | if ((h->flags & P_TYPE0x1f) == P_BINTERNAL0x01) |
77 | for (i = 0; i < top; i++) { |
78 | M_16_SWAP(h->linp[i]){ u_int16_t _tmp = h->linp[i]; ((char *)&h->linp[i] )[0] = ((char *)&_tmp)[1]; ((char *)&h->linp[i])[1 ] = ((char *)&_tmp)[0]; }; |
79 | p = (char *)GETBINTERNAL(h, i)((BINTERNAL *)((char *)(h) + (h)->linp[i])); |
80 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
81 | p += sizeof(u_int32_t); |
82 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
83 | p += sizeof(pgno_t); |
84 | if (*(u_char *)p & P_BIGKEY0x02) { |
85 | p += sizeof(u_char); |
86 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
87 | p += sizeof(pgno_t); |
88 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
89 | } |
90 | } |
91 | else if ((h->flags & P_TYPE0x1f) == P_BLEAF0x02) |
92 | for (i = 0; i < top; i++) { |
93 | M_16_SWAP(h->linp[i]){ u_int16_t _tmp = h->linp[i]; ((char *)&h->linp[i] )[0] = ((char *)&_tmp)[1]; ((char *)&h->linp[i])[1 ] = ((char *)&_tmp)[0]; }; |
94 | p = (char *)GETBLEAF(h, i)((BLEAF *)((char *)(h) + (h)->linp[i])); |
95 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
96 | p += sizeof(u_int32_t); |
97 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
98 | p += sizeof(u_int32_t); |
99 | flags = *(u_char *)p; |
100 | if (flags & (P_BIGKEY0x02 | P_BIGDATA0x01)) { |
101 | p += sizeof(u_char); |
102 | if (flags & P_BIGKEY0x02) { |
103 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
104 | p += sizeof(pgno_t); |
105 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
106 | } |
107 | if (flags & P_BIGDATA0x01) { |
108 | p += sizeof(u_int32_t); |
109 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
110 | p += sizeof(pgno_t); |
111 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
112 | } |
113 | } |
114 | } |
115 | } |
116 | |
117 | void |
118 | __bt_pgout(void *t, pgno_t pg, void *pp) |
119 | { |
120 | PAGE *h; |
121 | indx_t i, top; |
122 | u_char flags; |
123 | char *p; |
124 | |
125 | if (!F_ISSET(((BTREE *)t), B_NEEDSWAP)((((BTREE *)t))->flags & (0x00008))) |
126 | return; |
127 | if (pg == P_META0) { |
128 | mswap(pp); |
129 | return; |
130 | } |
131 | |
132 | h = pp; |
133 | top = NEXTINDEX(h)(((h)->lower - (sizeof(pgno_t) + sizeof(pgno_t) + sizeof(pgno_t ) + sizeof(u_int32_t) + sizeof(indx_t) + sizeof(indx_t))) / sizeof (indx_t)); |
134 | if ((h->flags & P_TYPE0x1f) == P_BINTERNAL0x01) |
135 | for (i = 0; i < top; i++) { |
136 | p = (char *)GETBINTERNAL(h, i)((BINTERNAL *)((char *)(h) + (h)->linp[i])); |
137 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
138 | p += sizeof(u_int32_t); |
139 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
140 | p += sizeof(pgno_t); |
141 | if (*(u_char *)p & P_BIGKEY0x02) { |
142 | p += sizeof(u_char); |
143 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
144 | p += sizeof(pgno_t); |
145 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
146 | } |
147 | M_16_SWAP(h->linp[i]){ u_int16_t _tmp = h->linp[i]; ((char *)&h->linp[i] )[0] = ((char *)&_tmp)[1]; ((char *)&h->linp[i])[1 ] = ((char *)&_tmp)[0]; }; |
148 | } |
149 | else if ((h->flags & P_TYPE0x1f) == P_BLEAF0x02) |
150 | for (i = 0; i < top; i++) { |
151 | p = (char *)GETBLEAF(h, i)((BLEAF *)((char *)(h) + (h)->linp[i])); |
152 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
153 | p += sizeof(u_int32_t); |
154 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
155 | p += sizeof(u_int32_t); |
156 | flags = *(u_char *)p; |
157 | if (flags & (P_BIGKEY0x02 | P_BIGDATA0x01)) { |
158 | p += sizeof(u_char); |
159 | if (flags & P_BIGKEY0x02) { |
160 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
161 | p += sizeof(pgno_t); |
162 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
163 | } |
164 | if (flags & P_BIGDATA0x01) { |
165 | p += sizeof(u_int32_t); |
166 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
167 | p += sizeof(pgno_t); |
168 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; |
169 | } |
170 | } |
171 | M_16_SWAP(h->linp[i]){ u_int16_t _tmp = h->linp[i]; ((char *)&h->linp[i] )[0] = ((char *)&_tmp)[1]; ((char *)&h->linp[i])[1 ] = ((char *)&_tmp)[0]; }; |
172 | } |
173 | |
174 | M_32_SWAP(h->pgno){ u_int32_t _tmp = h->pgno; ((char *)&h->pgno)[0] = ((char *)&_tmp)[3]; ((char *)&h->pgno)[1] = ((char *)&_tmp)[2]; ((char *)&h->pgno)[2] = ((char *)& _tmp)[1]; ((char *)&h->pgno)[3] = ((char *)&_tmp)[ 0]; }; |
175 | M_32_SWAP(h->prevpg){ u_int32_t _tmp = h->prevpg; ((char *)&h->prevpg)[ 0] = ((char *)&_tmp)[3]; ((char *)&h->prevpg)[1] = ((char *)&_tmp)[2]; ((char *)&h->prevpg)[2] = ((char *)&_tmp)[1]; ((char *)&h->prevpg)[3] = ((char *)& _tmp)[0]; }; |
176 | M_32_SWAP(h->nextpg){ u_int32_t _tmp = h->nextpg; ((char *)&h->nextpg)[ 0] = ((char *)&_tmp)[3]; ((char *)&h->nextpg)[1] = ((char *)&_tmp)[2]; ((char *)&h->nextpg)[2] = ((char *)&_tmp)[1]; ((char *)&h->nextpg)[3] = ((char *)& _tmp)[0]; }; |
177 | M_32_SWAP(h->flags){ u_int32_t _tmp = h->flags; ((char *)&h->flags)[0] = ((char *)&_tmp)[3]; ((char *)&h->flags)[1] = (( char *)&_tmp)[2]; ((char *)&h->flags)[2] = ((char * )&_tmp)[1]; ((char *)&h->flags)[3] = ((char *)& _tmp)[0]; }; |
178 | M_16_SWAP(h->lower){ u_int16_t _tmp = h->lower; ((char *)&h->lower)[0] = ((char *)&_tmp)[1]; ((char *)&h->lower)[1] = (( char *)&_tmp)[0]; }; |
179 | M_16_SWAP(h->upper){ u_int16_t _tmp = h->upper; ((char *)&h->upper)[0] = ((char *)&_tmp)[1]; ((char *)&h->upper)[1] = (( char *)&_tmp)[0]; }; |
180 | } |
181 | |
182 | /* |
183 | * MSWAP -- Actually swap the bytes on the meta page. |
184 | * |
185 | * Parameters: |
186 | * p: page to convert |
187 | */ |
188 | static void |
189 | mswap(PAGE *pg) |
190 | { |
191 | char *p; |
192 | |
193 | p = (char *)pg; |
194 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; /* magic */ |
195 | p += sizeof(u_int32_t); |
196 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; /* version */ |
197 | p += sizeof(u_int32_t); |
198 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; /* psize */ |
199 | p += sizeof(u_int32_t); |
200 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; /* free */ |
201 | p += sizeof(u_int32_t); |
202 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; /* nrecs */ |
203 | p += sizeof(u_int32_t); |
204 | P_32_SWAP(p){ u_int32_t _tmp = *(u_int32_t *)p; ((char *)p)[0] = ((char * )&_tmp)[3]; ((char *)p)[1] = ((char *)&_tmp)[2]; ((char *)p)[2] = ((char *)&_tmp)[1]; ((char *)p)[3] = ((char *) &_tmp)[0]; }; /* flags */ |
205 | p += sizeof(u_int32_t); |
Value stored to 'p' is never read | |
206 | } |