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1 /*******************************************************************************
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2
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3 copyright: Copyright (c) 2006 Keinfarbton. All rights reserved
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4
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5 license: BSD style: $(LICENSE)
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6
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7 version: Initial release: October 2006
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8
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9 author: Keinfarbton
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10
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11 *******************************************************************************/
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12
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13 module tango.stdc.stringz;
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14
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15 /*********************************
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16 * Convert array of chars s[] to a C-style 0 terminated string.
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17 */
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18
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19 char* toStringz (char[] s)
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20 {
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21 if (s.ptr)
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22 if (! (s.length && s[$-1] is 0))
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23 s = s ~ '\0';
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24 return s.ptr;
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25 }
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26
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27 /*********************************
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28 * Convert a C-style 0 terminated string to an array of char
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29 */
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30
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31 char[] fromUtf8z (char* s)
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32 {
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33 return s ? s[0 .. strlenz(s)] : null;
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34 }
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35
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36 /*********************************
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37 * Convert array of wchars s[] to a C-style 0 terminated string.
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38 */
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39
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40 wchar* toString16z (wchar[] s)
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41 {
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42 if (s.ptr)
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43 if (! (s.length && s[$-1] is 0))
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44 s = s ~ "\0"w;
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45 return s.ptr;
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46 }
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47
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48 /*********************************
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49 * Convert a C-style 0 terminated string to an array of wchar
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50 */
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51
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52 wchar[] fromUtf16z (wchar* s)
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53 {
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54 return s ? s[0 .. strlenz(s)] : null;
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55 }
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56
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57 /*********************************
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58 * portable strlen
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59 */
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60
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61 size_t strlenz(T) (T* s)
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62 {
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63 size_t i;
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64
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65 if (s)
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66 while (*s++)
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67 ++i;
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68 return i;
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69 }
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70
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71
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72
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73 debug (UnitTest)
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74 {
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75 import tango.stdc.stdio;
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76
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77 unittest
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78 {
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79 debug(string) printf("stdc.stringz.unittest\n");
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80
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81 char* p = toStringz("foo");
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82 assert(strlenz(p) == 3);
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83 char foo[] = "abbzxyzzy";
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84 p = toStringz(foo[3..5]);
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85 assert(strlenz(p) == 2);
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86
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87 char[] test = "\0";
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88 p = toStringz(test);
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89 assert(*p == 0);
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90 assert(p == test.ptr);
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91 }
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92 }
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93
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