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annotate lwlib/lw_string.c @ 437:c84dd1265376
Added tag lwtools-4.14 for changeset 9f49f0966c1e
author | William Astle <lost@l-w.ca> |
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date | Sun, 09 Apr 2017 00:15:25 -0600 |
parents | 8e25147c2aa8 |
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0
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1 /* |
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2 lw_string.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 <string.h> |
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23 #include <stdlib.h> |
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24 |
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25 #include "lw_alloc.h" |
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26 #include "lw_string.h" |
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27 |
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28 char *lw_strdup(const char *s) |
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29 { |
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30 char *r; |
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31 |
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32 if (!s) |
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33 s = "(null)"; |
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34 |
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35 r = lw_alloc(strlen(s) + 1); |
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36 strcpy(r, s); |
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37 return r; |
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38 } |
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39 |
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40 char *lw_strndup(const char *s, int len) |
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41 { |
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42 char *r; |
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43 int sl; |
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44 |
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45 sl = strlen(s); |
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46 if (sl > len) |
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47 sl = len; |
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48 |
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49 r = lw_alloc(sl + 1); |
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50 memmove(r, s, sl); |
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51 r[sl] = '\0'; |
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52 return r; |
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53 } |
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54 |
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55 char *lw_token(const char *s, int sep, const char **ap) |
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56 { |
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57 const char *p; |
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58 char *r; |
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59 |
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60 if (!s) |
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61 return NULL; |
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62 |
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63 p = strchr(s, sep); |
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64 if (!p) |
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65 { |
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66 if (ap) |
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67 *ap = NULL; |
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68 return lw_strdup(s); |
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69 } |
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70 |
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71 r = lw_alloc(p - s + 1); |
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72 strncpy(r, (char *)s, p - s); |
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73 r[p - s] = '\0'; |
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74 |
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75 if (ap) |
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76 { |
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77 while (*p && *p == sep) |
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78 p++; |
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79 *ap = p; |
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80 } |
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81 return r; |
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82 } |