np/np-conv.h@29e881a58856 (annotated)
np/np-conv.h
Sat, 21 Apr 2012 11:00:13 +0000
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- Sat, 21 Apr 2012 11:00:13 +0000
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| 60 | 1 | /* |
| 2 | * libtu/np-conv.h | |
| 3 | * | |
| 4 | * Copyright (c) Tuomo Valkonen 1999-2002. | |
| 5 | * | |
| 6 | * You may distribute and modify this library under the terms of either | |
| 7 | * the Clarified Artistic License or the GNU LGPL, version 2.1 or later. | |
| 8 | */ | |
| 9 | ||
| 10 | #include <math.h> | |
| 11 | ||
| 12 | #ifdef NP_SIMPLE_IMPL | |
| 13 | ||
| 14 | #define FN_NUM_TO_SIGNED(T, UMAX, MAX, MIN) \ | |
| 15 | static int num_to_##T(T *ret, const NPNum *num, bool allow_uns_big) \ | |
| 16 | { \ | |
| 62 | 17 | if(num->type!=NPNUM_INT) \ |
| 18 | return E_TOKZ_NOTINT; \ | |
| 19 | \ | |
| 20 | if(!num->negative){ \ | |
| 21 | *ret=num->ival; \ | |
| 22 | if(allow_uns_big?num->ival>UMAX:num->ival>MAX) \ | |
| 23 | return E_TOKZ_RANGE; \ | |
| 24 | }else{ \ | |
| 25 | *ret=-num->ival; \ | |
| 26 | if(num->ival>-(ulong)MIN) \ | |
| 27 | return E_TOKZ_RANGE; \ | |
| 28 | } \ | |
| 29 | return 0; \ | |
| 60 | 30 | } |
| 31 | ||
| 32 | #define FN_NUM_TO_UNSIGNED(T, UMAX, MIN) \ | |
| 33 | static int num_to_##T(T *ret, const NPNum *num, bool allow_neg) \ | |
| 34 | { \ | |
| 62 | 35 | if(num->type!=NPNUM_INT) \ |
| 36 | return E_TOKZ_NOTINT; \ | |
| 37 | \ | |
| 38 | if(!num->negative){ \ | |
| 39 | *ret=num->ival; \ | |
| 40 | if(num->ival>UMAX) \ | |
| 41 | return E_TOKZ_RANGE; \ | |
| 42 | }else{ \ | |
| 43 | *ret=-num->ival; \ | |
| 44 | if(!allow_neg || num->ival>(ulong)-MIN) \ | |
| 45 | return E_TOKZ_RANGE; \ | |
| 46 | } \ | |
| 47 | return 0; \ | |
| 60 | 48 | } |
| 49 | ||
| 50 | #define FN_NUM_TO_FLOAT(T, POW) \ | |
| 51 | static int num_to_##T(T *ret, const NPNum *num) \ | |
| 52 | { \ | |
| 62 | 53 | *ret=(num->negative?-num->fval:num->fval); \ |
| 54 | return 0; \ | |
| 60 | 55 | } |
| 56 | ||
| 57 | #else /* NP_SIMPLE_IMPL */ | |
| 58 | ||
| 59 | #define FN_NUM_TO_SIGNED(T, UMAX, MAX, MIN) \ | |
| 60 | static int num_to_##T(T *ret, const NPNum *num, bool allow_uns_big) \ | |
| 61 | { \ | |
| 62 | 62 | if(num->exponent) \ |
| 63 | return E_TOKZ_NOTINT; \ | |
| 64 | if(num->nmantissa>0) \ | |
| 65 | return E_TOKZ_RANGE; \ | |
| 60 | 66 | \ |
| 62 | 67 | if(!num->negative){ \ |
| 68 | *ret=num->mantissa[0]; \ | |
| 69 | if(allow_uns_big?num->mantissa[0]>UMAX:num->mantissa[0]>MAX) \ | |
| 70 | return E_TOKZ_RANGE; \ | |
| 71 | }else{ \ | |
| 72 | *ret=-num->mantissa[0]; \ | |
| 73 | if(num->mantissa[0]>-(ulong)MIN) \ | |
| 74 | return E_TOKZ_RANGE; \ | |
| 75 | } \ | |
| 76 | return 0; \ | |
| 60 | 77 | } |
| 78 | ||
| 79 | #define FN_NUM_TO_UNSIGNED(T, UMAX, MIN) \ | |
| 80 | static int num_to_##T(T *ret, const NPNum *num, bool allow_neg) \ | |
| 81 | { \ | |
| 62 | 82 | if(num->exponent) \ |
| 83 | return E_TOKZ_NOTINT; \ | |
| 84 | if(num->nmantissa>0) \ | |
| 85 | return E_TOKZ_RANGE; \ | |
| 60 | 86 | \ |
| 62 | 87 | if(!num->negative){ \ |
| 88 | *ret=num->mantissa[0]; \ | |
| 89 | if(num->mantissa[0]>UMAX) \ | |
| 90 | return E_TOKZ_RANGE; \ | |
| 91 | }else{ \ | |
| 92 | *ret=-num->mantissa[0]; \ | |
| 93 | if(!allow_neg || num->mantissa[0]>(ulong)-MIN) \ | |
| 94 | return E_TOKZ_RANGE; \ | |
| 95 | } \ | |
| 96 | return 0; \ | |
| 60 | 97 | } |
| 98 | ||
| 99 | ||
| 100 | #define FN_NUM_TO_FLOAT(T, POW) \ | |
| 101 | static int num_to_##T(T *ret, const NPNum *num) \ | |
| 102 | { \ | |
| 62 | 103 | T d=0; \ |
| 104 | int i; \ | |
| 60 | 105 | \ |
| 62 | 106 | for(i=num->nmantissa;i>=0;i--) \ |
| 107 | d=d*(T)(ULONG_MAX+1.0)+num->mantissa[i]; \ | |
| 108 | \ | |
| 109 | d*=POW(num->base, num->exponent); \ | |
| 110 | *ret=d; \ | |
| 111 | \ | |
| 112 | return 0; \ | |
| 60 | 113 | } |
| 114 | ||
| 115 | #endif /* NP_SIMPLE_IMPL */ | |
| 116 | ||
| 117 | FN_NUM_TO_SIGNED(long, ULONG_MAX, LONG_MAX, LONG_MIN) | |
| 118 | FN_NUM_TO_SIGNED(char, UCHAR_MAX, CHAR_MAX, CHAR_MIN) | |
| 119 | FN_NUM_TO_FLOAT(double, pow) | |
| 120 | ||
| 121 | #undef NEG |
