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annotate lwlib/lw_stringlist.c @ 454:ffdef8994f13

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author William Astle <lost@l-w.ca>
date Fri, 16 Feb 2018 22:52:44 -0700
parents a1a88a8ddc98
children
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1 /*
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2 lw_stringlist.c
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3
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4 Copyright © 2010 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <stdlib.h>
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23
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24 #define ___lw_stringlist_c_seen___
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25 #include "lw_stringlist.h"
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26 #include "lw_string.h"
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27 #include "lw_alloc.h"
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28
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29 lw_stringlist_t lw_stringlist_create(void)
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30 {
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31 lw_stringlist_t s;
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34 s = lw_alloc(sizeof(struct lw_stringlist_priv));
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35 s -> strings = NULL;
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36 s -> nstrings = 0;
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37 s -> cstring = 0;
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38
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39 return s;
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40 }
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41
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42 void lw_stringlist_destroy(lw_stringlist_t S)
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43 {
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44 if (S)
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45 {
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46 int i;
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47 for (i = 0; i < S -> nstrings; i++)
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48 {
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49 lw_free(S -> strings[i]);
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50 }
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a1a88a8ddc98 Fix small memory leak in lw_stringlist_destroy()
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51 lw_free(S -> strings);
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52 lw_free(S);
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53 }
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54 }
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55
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56 void lw_stringlist_addstring(lw_stringlist_t S, char *str)
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57 {
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58 S -> strings = lw_realloc(S -> strings, sizeof(char *) * (S -> nstrings + 1));
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59 S -> strings[S -> nstrings] = lw_strdup(str);
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60 S -> nstrings++;
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61 }
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62
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63 void lw_stringlist_reset(lw_stringlist_t S)
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64 {
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65 S -> cstring = 0;
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66 }
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67
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68 char *lw_stringlist_current(lw_stringlist_t S)
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69 {
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70 if (S -> cstring >= S -> nstrings)
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71 return NULL;
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72 return S -> strings[S -> cstring];
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73 }
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74
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75 char *lw_stringlist_next(lw_stringlist_t S)
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76 {
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77 S -> cstring++;
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78 return lw_stringlist_current(S);
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79 }
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80
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81 int lw_stringlist_nstrings(lw_stringlist_t S)
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82 {
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83 return S -> nstrings;
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84 }
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85
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86 lw_stringlist_t lw_stringlist_copy(lw_stringlist_t S)
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87 {
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88 lw_stringlist_t r;
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89
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90 r = lw_alloc(sizeof(lw_stringlist_t));
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91 r -> nstrings = S -> nstrings;
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92 if (S -> nstrings)
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93 {
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94 int i;
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95
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96 r -> strings = lw_alloc(sizeof(char *) * S -> nstrings);
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97 for (i = 0; i < S -> nstrings; i++)
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98 {
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99 r -> strings[i] = lw_strdup(S -> strings[i]);
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100 }
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101 }
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102 return r;
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103 }