1/****************************************************************************
2 * Copyright 2020 Thomas E. Dickey                                          *
3 * Copyright 2009-2010,2011 Free Software Foundation, Inc.                  *
4 *                                                                          *
5 * Permission is hereby granted, free of charge, to any person obtaining a  *
6 * copy of this software and associated documentation files (the            *
7 * "Software"), to deal in the Software without restriction, including      *
8 * without limitation the rights to use, copy, modify, merge, publish,      *
9 * distribute, distribute with modifications, sublicense, and/or sell       *
10 * copies of the Software, and to permit persons to whom the Software is    *
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.                   *
15 *                                                                          *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
23 *                                                                          *
24 * Except as contained in this notice, the name(s) of the above copyright   *
25 * holders shall not be used in advertising or otherwise to promote the     *
26 * sale, use or other dealings in this Software without prior written       *
27 * authorization.                                                           *
28 ****************************************************************************/
29
30/****************************************************************************
31 *  Author: Thomas E. Dickey                                                *
32 ****************************************************************************/
33#include <progs.priv.h>
34#include <string.h>
35
36#include <transform.h>
37
38MODULE_ID("$Id: transform.c,v 1.4 2020/02/02 23:34:34 tom Exp $")
39
40#ifdef SUFFIX_IGNORED
41static void
42trim_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
70bool
71same_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}
81