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 | |
44 | static 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 | */ |
59 | bool 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 | */ |
83 | bool 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 | |