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1 /* |
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2 * File: sstring.c |
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3 * Author: olaf |
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4 * |
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5 * Created on 17. Juni 2010, 13:27 |
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6 */ |
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7 |
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8 #include <stdlib.h> |
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9 #include <string.h> |
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10 #include <stdarg.h> |
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11 |
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12 #include "string.h" |
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13 |
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14 sstr_t sstr (char *s) { |
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15 sstr_t string; |
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16 string.ptr = s; |
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17 string.length = strlen(s); |
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18 return string; |
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19 } |
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20 |
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21 sstr_t sstrn (char *s, size_t n) { |
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22 sstr_t string; |
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23 string.ptr = s; |
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24 string.length = n; |
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25 return string; |
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26 } |
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27 |
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28 size_t sstrnlen (size_t n, sstr_t s, ...) { |
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29 va_list ap; |
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30 size_t size = s.length; |
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31 va_start(ap, s); |
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32 |
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33 for (int i=0;i<n-1;i++) { |
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34 sstr_t str = va_arg(ap, sstr_t); |
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35 size += str.length; |
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36 } |
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37 |
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38 return size; |
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39 } |
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40 |
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41 sstr_t sstrcat (sstr_t s, ...) { |
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42 va_list ap; |
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43 va_start(ap, s); |
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44 s.ptr[0] = 0; |
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45 |
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46 sstr_t str = va_arg (ap, sstr_t); |
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47 while (str.ptr != NULL) { |
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48 s.ptr = strncat (s.ptr, str.ptr, s.length); |
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49 str = va_arg (ap, sstr_t); |
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50 } |
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51 |
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52 return s; |
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53 } |
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54 |
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55 sstr_t sstrncat (size_t n, sstr_t s, sstr_t c1, ...) { |
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56 va_list ap; |
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57 va_start(ap, c1); |
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58 s.ptr[0] = 0; |
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59 |
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60 s.ptr = strncat (s.ptr, c1.ptr, s.length); |
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61 for (int i=0;i<n-1;i++) { |
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62 sstr_t str = va_arg (ap, sstr_t); |
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63 s.ptr = strncat (s.ptr, str.ptr, s.length); |
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64 } |
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65 |
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66 return s; |
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67 } |
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68 |
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69 sstr_t sstrsubs (sstr_t s, size_t start) { |
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70 return sstrsubsl (s, start, s.length-start); |
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71 } |
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72 |
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73 sstr_t sstrsubsl (sstr_t s, size_t start, size_t length) { |
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74 sstr_t new_sstr; |
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75 if (start < 0 || start >= s.length || length < 0) { |
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76 return s; |
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77 } |
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78 if (length > s.length-start) { |
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79 length = s.length-start; |
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80 } |
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81 new_sstr.ptr = &s.ptr[start]; |
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82 new_sstr.length = length; |
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83 return new_sstr; |
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84 } |
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85 |
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86 int sstrcmp(sstr_t s1, sstr_t s2) { |
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87 return strncmp(s1.ptr, s2.ptr, s1.length>s2.length ? s2.length: s1.length); |
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88 } |
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89 |
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90 sstr_t sstrdub(sstr_t s) { |
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91 sstr_t newstring; |
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92 newstring.ptr = malloc(s.length + 1); |
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93 newstring.length = s.length; |
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94 newstring.ptr[newstring.length] = 0; |
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95 |
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96 memcpy(newstring.ptr, s.ptr, s.length); |
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97 |
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98 return newstring; |
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99 } |