1/* Test of u32_prev() function.
2   Copyright (C) 2010 Free Software Foundation, Inc.
3
4   This program is free software: you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 3 of the License, or
7   (at your option) any later version.
8
9   This program 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
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
16
17/* Written by Bruno Haible <bruno@clisp.org>, 2010.  */
18
19#include <config.h>
20
21#include "unistr.h"
22
23#include "macros.h"
24
25static int
26check (const uint32_t *input, size_t input_length, ucs4_t *puc)
27{
28  ucs4_t uc;
29
30  /* Test recognition when at the beginning of the string.  */
31  if (u32_prev (&uc, input + input_length, input) != input)
32    return 1;
33
34  /* Test recognition when preceded by a 1-unit character.  */
35  {
36    uint32_t buf[100];
37    uint32_t *ptr;
38    size_t i;
39    ucs4_t uc1;
40
41    ptr = buf;
42    *ptr++ = 0x1D51E;
43    for (i = 0; i < input_length; i++)
44      ptr[i] = input[i];
45
46    if (u32_prev (&uc1, ptr + input_length, buf) != ptr)
47      return 2;
48    if (uc1 != uc)
49      return 3;
50  }
51
52  *puc = uc;
53  return 0;
54}
55
56static int
57check_invalid (const uint32_t *input, size_t input_length)
58{
59#if CONFIG_UNICODE_SAFETY
60  ucs4_t uc;
61
62  /* Test recognition when at the beginning of the string.  */
63  uc = 0xBADFACE;
64  if (u32_prev (&uc, input + input_length, input) != NULL)
65    return 1;
66  if (uc != 0xBADFACE)
67    return 2;
68
69  /* Test recognition when preceded by a 1-unit character.  */
70  {
71    uint32_t buf[100];
72    uint32_t *ptr;
73    size_t i;
74
75    ptr = buf;
76    *ptr++ = 0x1D51E;
77    for (i = 0; i < input_length; i++)
78      ptr[i] = input[i];
79
80    uc = 0xBADFACE;
81    if (u32_prev (&uc, ptr + input_length, buf) != NULL)
82      return 3;
83    if (uc != 0xBADFACE)
84      return 4;
85  }
86#endif
87
88  return 0;
89}
90
91int
92main ()
93{
94  ucs4_t uc;
95
96  /* Test ISO 646 unit input.  */
97  {
98    ucs4_t c;
99    uint32_t buf[1];
100
101    for (c = 0; c < 0x80; c++)
102      {
103        buf[0] = c;
104        uc = 0xBADFACE;
105        ASSERT (check (buf, 1, &uc) == 0);
106        ASSERT (uc == c);
107      }
108  }
109
110  /* Test BMP unit input.  */
111  {
112    static const uint32_t input[] = { 0x20AC };
113    uc = 0xBADFACE;
114    ASSERT (check (input, SIZEOF (input), &uc) == 0);
115    ASSERT (uc == 0x20AC);
116  }
117
118  /* Test non-BMP unit input.  */
119  {
120    static const uint32_t input[] = { 0x1D51F };
121    uc = 0xBADFACE;
122    ASSERT (check (input, SIZEOF (input), &uc) == 0);
123    ASSERT (uc == 0x1D51F);
124  }
125
126  /* Test incomplete/invalid 1-unit input.  */
127  {
128    static const uint32_t input[] = { 0x340000 };
129    ASSERT (check_invalid (input, SIZEOF (input)) == 0);
130  }
131
132  return 0;
133}
134