contrib/ncurses/progs/transform.c

   1 /****************************************************************************
   2  * Copyright 2020 Thomas E. Dickey                                          *
   3  * Copyright 2009-2010,2011 Free Software Foundation, Inc.                  *
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   6  * copy of this software and associated documentation files (the            *
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  11  * furnished to do so, subject to the following conditions:                 *
  12  *                                                                          *
  13  * The above copyright notice and this permission notice shall be included  *
  14  * in all copies or substantial portions of the Software.                   *
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  29
  30 /****************************************************************************
  31  *  Author: Thomas E. Dickey                                                *
  32  ****************************************************************************/
  33 #include <progs.priv.h>
  34 #include <string.h>
  35
  36 #include <transform.h>
  37
  38 MODULE_ID("$Id: transform.c,v 1.4 2020/02/02 23:34:34 tom Exp $")
  39
  40 #ifdef SUFFIX_IGNORED
  41 static void
  42 trim_suffix(const char *a, size_t *len)
  43 {
  44     const char ignore[] = SUFFIX_IGNORED;
  45
  46     if (sizeof(ignore) != 0) {
  47         bool trim = FALSE;
  48         size_t need = (sizeof(ignore) - 1);
  49
  50         if (*len > need) {
  51             size_t first = *len - need;
  52             size_t n;
  53             trim = TRUE;
  54             for (n = first; n < *len; ++n) {
  55                 if (tolower(UChar(a[n])) != tolower(UChar(ignore[n - first]))) {
  56                     trim = FALSE;
  57                     break;
  58                 }
  59             }
  60             if (trim) {
  61                 *len -= need;
  62             }
  63         }
  64     }
  65 }
  66 #else
  67 #define trim_suffix(a, len)     /* nothing */
  68 #endif
  69
  70 bool
  71 same_program(const char *a, const char *b)
  72 {
  73     size_t len_a = strlen(a);
  74     size_t len_b = strlen(b);
  75
  76     trim_suffix(a, &len_a);
  77     trim_suffix(b, &len_b);
  78
  79     return (len_a == len_b) && (strncmp(a, b, len_a) == 0);
  80 }