tests/unistr/test-u32-to-u16.c

   1 /* Test of u32_to_u16() function.
   2    Copyright (C) 2010-2020 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 <https://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 <errno.h>
  24
  25 #include "macros.h"
  26
  27 static int
  28 check (const uint32_t *input, size_t input_length,
  29        const uint16_t *expected, size_t expected_length)
  30 {
  31   size_t length;
  32   uint16_t *result;
  33
  34   /* Test return conventions with resultbuf == NULL.  */
  35   result = u32_to_u16 (input, input_length, NULL, &length);
  36   if (!(result != NULL))
  37     return 1;
  38   if (!(length == expected_length))
  39     return 2;
  40   if (!(u16_cmp (result, expected, expected_length) == 0))
  41     return 3;
  42   free (result);
  43
  44   /* Test return conventions with resultbuf too small.  */
  45   if (expected_length > 0)
  46     {
  47       uint16_t *preallocated;
  48
  49       length = expected_length - 1;
  50       preallocated = (uint16_t *) malloc (length * sizeof (uint16_t));
  51       result = u32_to_u16 (input, input_length, preallocated, &length);
  52       if (!(result != NULL))
  53         return 4;
  54       if (!(result != preallocated))
  55         return 5;
  56       if (!(length == expected_length))
  57         return 6;
  58       if (!(u16_cmp (result, expected, expected_length) == 0))
  59         return 7;
  60       free (result);
  61       free (preallocated);
  62     }
  63
  64   /* Test return conventions with resultbuf large enough.  */
  65   {
  66     uint16_t *preallocated;
  67
  68     length = expected_length;
  69     preallocated = (uint16_t *) malloc (length * sizeof (uint16_t));
  70     result = u32_to_u16 (input, input_length, preallocated, &length);
  71     if (!(result != NULL))
  72       return 8;
  73     if (!(preallocated == NULL || result == preallocated))
  74       return 9;
  75     if (!(length == expected_length))
  76       return 10;
  77     if (!(u16_cmp (result, expected, expected_length) == 0))
  78       return 11;
  79     free (preallocated);
  80   }
  81
  82   return 0;
  83 }
  84
  85 int
  86 main ()
  87 {
  88   /* Empty string.  */
  89   ASSERT (check (NULL, 0, NULL, 0) == 0);
  90
  91   /* Simple string.  */
  92   { /* "Grüß Gott. Здравствуйте! x=(-b±sqrt(b²-4ac))/(2a)  日本語,中文,한글" */
  93     static const uint32_t input[] =
  94       { 'G', 'r', 0x00FC, 0x00DF, ' ', 'G', 'o', 't', 't', '.', ' ',
  95         0x0417, 0x0434, 0x0440, 0x0430, 0x0432, 0x0441, 0x0442, 0x0432, 0x0443,
  96         0x0439, 0x0442, 0x0435, '!', ' ',
  97         'x', '=', '(', '-', 'b', 0x00B1, 's', 'q', 'r', 't', '(', 'b', 0x00B2,
  98         '-', '4', 'a', 'c', ')', ')', '/', '(', '2', 'a', ')', ' ', ' ',
  99         0x65E5, 0x672C, 0x8A9E, ',', 0x4E2D, 0x6587, ',', 0xD55C, 0xAE00, '\n'
 100       };
 101     static const uint16_t expected[] =
 102       { 'G', 'r', 0x00FC, 0x00DF, ' ', 'G', 'o', 't', 't', '.', ' ',
 103         0x0417, 0x0434, 0x0440, 0x0430, 0x0432, 0x0441, 0x0442, 0x0432, 0x0443,
 104         0x0439, 0x0442, 0x0435, '!', ' ',
 105         'x', '=', '(', '-', 'b', 0x00B1, 's', 'q', 'r', 't', '(', 'b', 0x00B2,
 106         '-', '4', 'a', 'c', ')', ')', '/', '(', '2', 'a', ')', ' ', ' ',
 107         0x65E5, 0x672C, 0x8A9E, ',', 0x4E2D, 0x6587, ',', 0xD55C, 0xAE00, '\n'
 108       };
 109     ASSERT (check (input, SIZEOF (input), expected, SIZEOF (expected)) == 0);
 110   }
 111
 112   /* String with characters outside the BMP.  */
 113   {
 114     static const uint32_t input[] =
 115       { '-', '(', 0x1D51E, 0x00D7, 0x1D51F, ')', '=',
 116         0x1D51F, 0x00D7, 0x1D51E
 117       };
 118     static const uint16_t expected[] =
 119       { '-', '(', 0xD835, 0xDD1E, 0x00D7, 0xD835, 0xDD1F, ')', '=',
 120         0xD835, 0xDD1F, 0x00D7, 0xD835, 0xDD1E
 121       };
 122     ASSERT (check (input, SIZEOF (input), expected, SIZEOF (expected)) == 0);
 123   }
 124
 125   /* Invalid input.  */
 126   {
 127     static const uint32_t input[] = { 'x', 0x340000, 0x50000000, 'y' };
 128 #if 0 /* Currently invalid input is rejected, not accommodated.  */
 129     static const uint16_t expected[] = { 'x', 0xFFFD, 0xFFFD, 'y' };
 130     ASSERT (check (input, SIZEOF (input), expected, SIZEOF (expected)) == 0);
 131 #else
 132     size_t length;
 133     uint16_t *result;
 134     uint16_t preallocated[10];
 135
 136     /* Test return conventions with resultbuf == NULL.  */
 137     result = u32_to_u16 (input, SIZEOF (input), NULL, &length);
 138     ASSERT (result == NULL);
 139     ASSERT (errno == EILSEQ);
 140
 141     /* Test return conventions with resultbuf too small.  */
 142     length = 1;
 143     result = u32_to_u16 (input, SIZEOF (input), preallocated, &length);
 144     ASSERT (result == NULL);
 145     ASSERT (errno == EILSEQ);
 146
 147     /* Test return conventions with resultbuf large enough.  */
 148     length = SIZEOF (preallocated);
 149     result = u32_to_u16 (input, SIZEOF (input), preallocated, &length);
 150     ASSERT (result == NULL);
 151     ASSERT (errno == EILSEQ);
 152 #endif
 153   }
 154
 155   return 0;
 156 }