string/test-stpncpy.c

   1 /* Test and measure stpncpy functions.
   2    Copyright (C) 1999-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #define STRNCPY_RESULT(dst, len, n) ((dst) + ((len) > (n) ? (n) : (len)))
  21 #define TEST_MAIN
  22 #ifndef WIDE
  23 # define TEST_NAME "stpncpy"
  24 #else
  25 # define TEST_NAME "wcpncpy"
  26 #endif /* WIDE */
  27 #include "test-string.h"
  28 #ifndef WIDE
  29 # define CHAR char
  30 # define SIMPLE_STPNCPY simple_stpncpy
  31 # define STUPID_STPNCPY stupid_stpncpy
  32 # define STPNCPY stpncpy
  33 # define STRNLEN strnlen
  34 #else
  35 # include <wchar.h>
  36 # define CHAR wchar_t
  37 # define SIMPLE_STPNCPY simple_wcpncpy
  38 # define STUPID_STPNCPY stupid_wcpncpy
  39 # define STPNCPY wcpncpy
  40 # define STRNLEN wcsnlen
  41 #endif /* WIDE */
  42
  43 CHAR *SIMPLE_STPNCPY (CHAR *, const CHAR *, size_t);
  44 CHAR *STUPID_STPNCPY (CHAR *, const CHAR *, size_t);
  45
  46 IMPL (STUPID_STPNCPY, 0)
  47 IMPL (SIMPLE_STPNCPY, 0)
  48 IMPL (STPNCPY, 1)
  49
  50 CHAR *
  51 SIMPLE_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
  52 {
  53   while (n--)
  54     if ((*dst++ = *src++) == '\0')
  55       {
  56         size_t i;
  57
  58         for (i = 0; i < n; ++i)
  59           dst[i] = '\0';
  60         return dst - 1;
  61       }
  62   return dst;
  63 }
  64
  65 CHAR *
  66 STUPID_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
  67 {
  68   size_t nc = STRNLEN (src, n);
  69   size_t i;
  70
  71   for (i = 0; i < nc; ++i)
  72     dst[i] = src[i];
  73   for (; i < n; ++i)
  74     dst[i] = '\0';
  75   return dst + nc;
  76 }
  77
  78 #undef CHAR
  79 #include "test-strncpy.c"