Line data Source code
1 : /* FreeTDS - Library of routines accessing Sybase and Microsoft databases
2 : * Copyright (C) 2019 Frediano Ziglio
3 : *
4 : * This library is free software; you can redistribute it and/or
5 : * modify it under the terms of the GNU Library General Public
6 : * License as published by the Free Software Foundation; either
7 : * version 2 of the License, or (at your option) any later version.
8 : *
9 : * This library is distributed in the hope that it will be useful,
10 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 : * Library General Public License for more details.
13 : *
14 : * You should have received a copy of the GNU Library General Public
15 : * License along with this library; if not, write to the
16 : * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 : * Boston, MA 02111-1307, USA.
18 : */
19 :
20 : /*
21 : * Purpose: test bytes.h header.
22 : */
23 : #undef NDEBUG
24 : #include <config.h>
25 :
26 : #include <stdio.h>
27 : #include <assert.h>
28 :
29 : #ifdef HAVE_STRING_H
30 : #include <string.h>
31 : #endif
32 :
33 : #include "tds_sysdep_public.h"
34 : #include <freetds/bytes.h>
35 :
36 : #define WRITE(buf, off, bytes, endian, val) do { \
37 : if ((off % bytes) == 0) TDS_PUT_A ## bytes ## endian(buf+off, val); \
38 : else TDS_PUT_UA ## bytes ## endian(buf+off, val); \
39 : } while(0)
40 :
41 : #define READ(buf, off, bytes, endian) ( \
42 : ((off % bytes) == 0) ? TDS_GET_A ## bytes ## endian(buf+off) : \
43 : TDS_GET_UA ## bytes ## endian(buf+off) \
44 : )
45 :
46 : /* check read and write works at a given offset */
47 : #define CHECK(off, bytes, endian, expected) do { \
48 : uint32_t val = READ(bufs.u1.buf, off, bytes, endian); \
49 : WRITE(bufs.u2.buf, off, bytes, endian, val); \
50 : assert(READ(bufs.u1.buf, off, bytes, endian) == READ(bufs.u2.buf, off, bytes, endian)); \
51 : assert(val == expected); \
52 : } while(0)
53 :
54 : int
55 8 : main(void)
56 : {
57 : /* this structure make sure buffer are properly aligned */
58 : struct {
59 : union {
60 : uint8_t buf[26];
61 : uint32_t a1;
62 : } u1;
63 : union {
64 : uint8_t buf[26];
65 : uint32_t a2;
66 : } u2;
67 : } bufs;
68 : unsigned n;
69 :
70 8 : memset(&bufs, 0, sizeof(bufs));
71 216 : for (n = 0; n < sizeof(bufs.u1.buf); ++n)
72 208 : bufs.u1.buf[n] = (uint8_t) (123 * n + 67);
73 :
74 : /* aligned access */
75 8 : CHECK(0, 4, LE, 0xb439be43u);
76 8 : CHECK(4, 2, LE, 0xaa2fu);
77 8 : CHECK(6, 2, BE, 0x25a0u);
78 8 : CHECK(8, 4, BE, 0x1b96118cu);
79 :
80 8 : CHECK(12, 1, LE, 0x7u);
81 :
82 : /* unaligned access */
83 8 : CHECK(13, 2, BE, 0x82fdu);
84 8 : CHECK(15, 2, LE, 0xf378u);
85 8 : CHECK(17, 4, LE, 0xdf64e96eu);
86 8 : CHECK(21, 4, BE, 0x5ad550cbu);
87 :
88 8 : CHECK(25, 1, BE, 0x46);
89 8 : assert(memcmp(bufs.u1.buf, bufs.u2.buf, sizeof(bufs.u1.buf)) == 0);
90 :
91 : return 0;
92 : }
93 :
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