1 /*
2 * Copyright (c) 2017 The strace developers.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 * derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "defs.h"
28
29 struct dyxlat {
30 size_t used;
31 size_t allocated;
32 struct xlat *xlat;
33 };
34
35 #define MARK_END(xlat) \
36 do { \
37 (xlat).val = 0; \
38 (xlat).str = 0; \
39 } while (0)
40
41 struct dyxlat *
dyxlat_alloc(const size_t nmemb)42 dyxlat_alloc(const size_t nmemb)
43 {
44 struct dyxlat *const dyxlat = xmalloc(sizeof(*dyxlat));
45
46 dyxlat->used = 1;
47 dyxlat->allocated = nmemb ? nmemb : 16;
48 dyxlat->xlat = xcalloc(dyxlat->allocated, sizeof(struct xlat));
49 MARK_END(dyxlat->xlat[0]);
50
51 return dyxlat;
52 }
53
54 void
dyxlat_free(struct dyxlat * const dyxlat)55 dyxlat_free(struct dyxlat *const dyxlat)
56 {
57 size_t i;
58
59 for (i = 0; i < dyxlat->used - 1; ++i) {
60 free((void *) dyxlat->xlat[i].str);
61 dyxlat->xlat[i].str = NULL;
62 }
63
64 free(dyxlat->xlat);
65 dyxlat->xlat = NULL;
66 free(dyxlat);
67 }
68
69 const struct xlat *
dyxlat_get(const struct dyxlat * const dyxlat)70 dyxlat_get(const struct dyxlat *const dyxlat)
71 {
72 return dyxlat->xlat;
73 }
74
75 void
dyxlat_add_pair(struct dyxlat * const dyxlat,const uint64_t val,const char * const str,const size_t len)76 dyxlat_add_pair(struct dyxlat *const dyxlat, const uint64_t val,
77 const char *const str, const size_t len)
78 {
79 size_t i;
80
81 for (i = 0; i < dyxlat->used - 1; ++i) {
82 if (dyxlat->xlat[i].val == val) {
83 if (strncmp(dyxlat->xlat[i].str, str, len) == 0
84 && dyxlat->xlat[i].str[len] == '\0')
85 return;
86
87 free((void *) dyxlat->xlat[i].str);
88 dyxlat->xlat[i].str = xstrndup(str, len);
89 return;
90 }
91 }
92
93 if (dyxlat->used >= dyxlat->allocated) {
94 dyxlat->allocated *= 2;
95 dyxlat->xlat = xreallocarray(dyxlat->xlat, dyxlat->allocated,
96 sizeof(struct xlat));
97 }
98
99 dyxlat->xlat[dyxlat->used - 1].val = val;
100 dyxlat->xlat[dyxlat->used - 1].str = xstrndup(str, len);
101 MARK_END(dyxlat->xlat[dyxlat->used]);
102 dyxlat->used++;
103 }
104