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