1 /* -*- mode: C -*-
2 *
3 * Copyright (c) 2007-2010 The University of Utah
4 * All rights reserved.
5 *
6 * This file is part of `csmith', a random generator of C programs.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * * Redistributions of source code must retain the above copyright notice,
12 * this list of conditions and the following disclaimer.
13 *
14 * * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #ifndef RANDOM_RUNTIME_H
32 #define RANDOM_RUNTIME_H
33
34 #ifdef CSMITH_MINIMAL
35 #include "csmith_minimal.h"
36 #else
37
38 /*****************************************************************************/
39
40 #include <string.h>
41
42 #define __STDC_LIMIT_MACROS
43 #include "random_inc.h"
44
45 static uint32_t crc32_tab[256];
46 static uint32_t crc32_context = 0xFFFFFFFFUL;
47
48 static void
crc32_gentab(void)49 crc32_gentab (void)
50 {
51 uint32_t crc;
52 const uint32_t poly = 0xEDB88320UL;
53 int i, j;
54
55 for (i = 0; i < 256; i++) {
56 crc = i;
57 for (j = 8; j > 0; j--) {
58 if (crc & 1) {
59 crc = (crc >> 1) ^ poly;
60 } else {
61 crc >>= 1;
62 }
63 }
64 crc32_tab[i] = crc;
65 }
66 }
67
68 static void
crc32_byte(uint8_t b)69 crc32_byte (uint8_t b) {
70 crc32_context =
71 ((crc32_context >> 8) & 0x00FFFFFF) ^
72 crc32_tab[(crc32_context ^ b) & 0xFF];
73 }
74
75 #if defined(__SPLAT__) || defined (__COMPCERT__) || defined(NO_LONGLONG)
76 static void
crc32_8bytes(uint32_t val)77 crc32_8bytes (uint32_t val)
78 {
79 crc32_byte ((val>>0) & 0xff);
80 crc32_byte ((val>>8) & 0xff);
81 crc32_byte ((val>>16) & 0xff);
82 crc32_byte ((val>>24) & 0xff);
83 }
84
85 static void
transparent_crc(uint32_t val,char * vname,int flag)86 transparent_crc (uint32_t val, char* vname, int flag)
87 {
88 crc32_8bytes(val);
89 if (flag) {
90 printf("...checksum after hashing %s : %X\n", vname, crc32_context ^ 0xFFFFFFFFU);
91 }
92 }
93 #else
94 static void
crc32_8bytes(uint64_t val)95 crc32_8bytes (uint64_t val)
96 {
97 crc32_byte ((val>>0) & 0xff);
98 crc32_byte ((val>>8) & 0xff);
99 crc32_byte ((val>>16) & 0xff);
100 crc32_byte ((val>>24) & 0xff);
101 crc32_byte ((val>>32) & 0xff);
102 crc32_byte ((val>>40) & 0xff);
103 crc32_byte ((val>>48) & 0xff);
104 crc32_byte ((val>>56) & 0xff);
105 }
106
107 static void
transparent_crc(uint64_t val,char * vname,int flag)108 transparent_crc (uint64_t val, char* vname, int flag)
109 {
110 crc32_8bytes(val);
111 if (flag) {
112 printf("...checksum after hashing %s : %lX\n", vname, crc32_context ^ 0xFFFFFFFFUL);
113 }
114 }
115 #endif
116
117 /*****************************************************************************/
118
119 #endif
120
121 #endif /* RANDOM_RUNTIME_H */
122
123 /*
124 * Local Variables:
125 * c-basic-offset: 4
126 * tab-width: 4
127 * End:
128 */
129
130 /* End of file. */
131