1 | /* |
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2 | ** $Id: lctype.h,v 1.12 2011/07/15 12:50:29 roberto Exp $ |
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3 | ** 'ctype' functions for Lua |
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4 | ** See Copyright Notice in lua.h |
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5 | */ |
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6 | |
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7 | #ifndef lctype_h |
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8 | #define lctype_h |
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9 | |
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10 | #include "lua.h" |
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11 | |
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12 | |
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13 | /* |
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14 | ** WARNING: the functions defined here do not necessarily correspond |
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15 | ** to the similar functions in the standard C ctype.h. They are |
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16 | ** optimized for the specific needs of Lua |
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17 | */ |
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18 | |
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19 | #if !defined(LUA_USE_CTYPE) |
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20 | |
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21 | #if 'A' == 65 && '0' == 48 |
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22 | /* ASCII case: can use its own tables; faster and fixed */ |
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23 | #define LUA_USE_CTYPE 0 |
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24 | #else |
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25 | /* must use standard C ctype */ |
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26 | #define LUA_USE_CTYPE 1 |
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27 | #endif |
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28 | |
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29 | #endif |
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30 | |
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31 | |
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32 | #if !LUA_USE_CTYPE /* { */ |
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33 | |
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34 | #include <limits.h> |
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35 | |
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36 | #include "llimits.h" |
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37 | |
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38 | |
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39 | #define ALPHABIT 0 |
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40 | #define DIGITBIT 1 |
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41 | #define PRINTBIT 2 |
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42 | #define SPACEBIT 3 |
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43 | #define XDIGITBIT 4 |
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44 | |
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45 | |
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46 | #define MASK(B) (1 << (B)) |
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47 | |
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48 | |
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49 | /* |
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50 | ** add 1 to char to allow index -1 (EOZ) |
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51 | */ |
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52 | #define testprop(c,p) (luai_ctype_[(c)+1] & (p)) |
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53 | |
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54 | /* |
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55 | ** 'lalpha' (Lua alphabetic) and 'lalnum' (Lua alphanumeric) both include '_' |
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56 | */ |
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57 | #define lislalpha(c) testprop(c, MASK(ALPHABIT)) |
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58 | #define lislalnum(c) testprop(c, (MASK(ALPHABIT) | MASK(DIGITBIT))) |
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59 | #define lisdigit(c) testprop(c, MASK(DIGITBIT)) |
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60 | #define lisspace(c) testprop(c, MASK(SPACEBIT)) |
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61 | #define lisprint(c) testprop(c, MASK(PRINTBIT)) |
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62 | #define lisxdigit(c) testprop(c, MASK(XDIGITBIT)) |
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63 | |
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64 | /* |
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65 | ** this 'ltolower' only works for alphabetic characters |
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66 | */ |
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67 | #define ltolower(c) ((c) | ('A' ^ 'a')) |
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68 | |
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69 | |
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70 | /* two more entries for 0 and -1 (EOZ) */ |
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71 | LUAI_DDEC const lu_byte luai_ctype_[UCHAR_MAX + 2]; |
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72 | |
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73 | |
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74 | #else /* }{ */ |
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75 | |
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76 | /* |
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77 | ** use standard C ctypes |
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78 | */ |
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79 | |
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80 | #include <ctype.h> |
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81 | |
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82 | |
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83 | #define lislalpha(c) (isalpha(c) || (c) == '_') |
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84 | #define lislalnum(c) (isalnum(c) || (c) == '_') |
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85 | #define lisdigit(c) (isdigit(c)) |
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86 | #define lisspace(c) (isspace(c)) |
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87 | #define lisprint(c) (isprint(c)) |
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88 | #define lisxdigit(c) (isxdigit(c)) |
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89 | |
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90 | #define ltolower(c) (tolower(c)) |
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91 | |
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92 | #endif /* } */ |
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93 | |
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94 | #endif |
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95 | |
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