1/* ----------------------------------------------------------------------- *
2 *
3 * Copyright 1996-2016 The NASM Authors - All Rights Reserved
4 * See the file AUTHORS included with the NASM distribution for
5 * the specific copyright holders.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following
9 * conditions are met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
19 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
20 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 *
32 * ----------------------------------------------------------------------- */
33
34/*
35 * strlist.c - simple linked list of strings
36 */
37
38#include "compiler.h"
39
40#include <string.h>
41
42#include "strlist.h"
43
44static inline StrList *nasm_str_to_strlist(const char *str)
45{
46 size_t l = strlen(str) + 1;
47 StrList *sl = nasm_malloc(l + sizeof sl->next);
48
49 memcpy(sl->str, str, l);
50 sl->next = NULL;
51
52 return sl;
53}
54
55/*
56 * Append a string list entry to a string list if and only if it isn't
57 * already there. Return true if it was added.
58 */
59bool nasm_add_to_strlist(StrList **head, StrList *entry)
60{
61 StrList *list;
62
63 if (!head)
64 return false;
65
66 list = *head;
67 while (list) {
68 if (!strcmp(list->str, entry->str))
69 return false;
70 head = &list->next;
71 list = list->next;
72 }
73
74 *head = entry;
75 entry->next = NULL;
76 return true;
77}
78
79/*
80 * Append a string to a string list if and only if it isn't
81 * already there. Return true if it was added.
82 */
83bool nasm_add_string_to_strlist(StrList **head, const char *str)
84{
85 StrList *list;
86
87 if (!head)
88 return false;
89
90 list = *head;
91 while (list) {
92 if (!strcmp(list->str, str))
93 return false;
94 head = &list->next;
95 list = list->next;
96 }
97
98 *head = nasm_str_to_strlist(str);
99 return true;
100}
101