1 /* bcmath.h: bcmath library header. */ 2 /* 3 Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc. 4 Copyright (C) 2000 Philip A. Nelson 5 6 This library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2 of the License, or (at your option) any later version. 10 11 This library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. (LICENSE) 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with this library; if not, write to: 18 19 The Free Software Foundation, Inc. 20 59 Temple Place, Suite 330 21 Boston, MA 02111-1307 USA. 22 23 You may contact the author by: 24 e-mail: philnelson@acm.org 25 us-mail: Philip A. Nelson 26 Computer Science Department, 9062 27 Western Washington University 28 Bellingham, WA 98226-9062 29 30 *************************************************************************/ 31 32 #ifndef _BCMATH_H_ 33 #define _BCMATH_H_ 34 35 #include <stddef.h> 36 37 typedef enum {PLUS, MINUS} sign; 38 39 typedef struct bc_struct *bc_num; 40 41 typedef struct bc_struct { 42 sign n_sign; 43 size_t n_len; /* The number of digits before the decimal point. */ 44 size_t n_scale; /* The number of digits after the decimal point. */ 45 int n_refs; /* The number of pointers to this number. */ 46 char *n_ptr; /* The pointer to the actual storage. 47 If NULL, n_value points to the inside of another number 48 (bc_multiply...) and should not be "freed." */ 49 char *n_value; /* The number. Not zero char terminated. 50 May not point to the same place as n_ptr as 51 in the case of leading zeros generated. */ 52 } bc_struct; 53 54 #ifdef HAVE_CONFIG_H 55 #include "config.h" 56 #endif 57 58 #include "zend.h" 59 #include <stdbool.h> 60 #include "zend_string.h" 61 #include "../../php_bcmath.h" /* Needed for BCG() macro */ 62 63 /* The base used in storing the numbers in n_value above. 64 Currently, this MUST be 10. */ 65 66 #define BASE 10 67 68 /* Some useful macros and constants. */ 69 70 #define CH_VAL(c) (c - '0') 71 #define BCD_CHAR(d) (d + '0') 72 73 #ifdef MIN 74 #undef MIN 75 #undef MAX 76 #endif 77 #define MAX(a, b) ((a)>(b)?(a):(b)) 78 #define MIN(a, b) ((a)>(b)?(b):(a)) 79 #define ODD(a) ((a)&1) 80 81 #ifndef LONG_MAX 82 #define LONG_MAX 0x7ffffff 83 #endif 84 85 86 /* Function Prototypes */ 87 88 void bc_init_numbers(void); 89 90 bc_num _bc_new_num_ex(size_t length, size_t scale, bool persistent); 91 92 void _bc_free_num_ex(bc_num *num, bool persistent); 93 94 bc_num bc_copy_num(bc_num num); 95 96 void bc_init_num(bc_num *num); 97 98 bool bc_str2num(bc_num *num, char *str, size_t scale); 99 100 zend_string *bc_num2str_ex(bc_num num, size_t scale); 101 102 void bc_int2num(bc_num *num, int val); 103 104 long bc_num2long(bc_num num); 105 106 int bc_compare(bc_num n1, bc_num n2); 107 108 bool bc_is_zero(bc_num num); 109 110 bool bc_is_zero_for_scale(bc_num num, size_t scale); 111 112 bool bc_is_near_zero(bc_num num, size_t scale); 113 114 bool bc_is_neg(bc_num num); 115 116 void bc_add(bc_num n1, bc_num n2, bc_num *result, size_t scale_min); 117 118 void bc_sub(bc_num n1, bc_num n2, bc_num *result, size_t scale_min); 119 120 void bc_multiply(bc_num n1, bc_num n2, bc_num *prod, size_t scale); 121 122 bool bc_divide(bc_num n1, bc_num n2, bc_num *quot, int scale); 123 124 bool bc_modulo(bc_num num1, bc_num num2, bc_num *resul, size_t scale); 125 126 bool bc_divmod(bc_num num1, bc_num num2, bc_num *quo, bc_num *rem, size_t scale); 127 128 typedef enum { 129 OK, 130 BASE_HAS_FRACTIONAL, 131 EXPO_HAS_FRACTIONAL, 132 EXPO_IS_NEGATIVE, 133 MOD_HAS_FRACTIONAL, 134 MOD_IS_ZERO 135 } raise_mod_status; 136 137 raise_mod_status bc_raisemod(bc_num base, bc_num exponent, bc_num mod, bc_num *result, size_t scale); 138 139 void bc_raise(bc_num base, long exponent, bc_num *resul, size_t scale); 140 141 void bc_raise_bc_exponent(bc_num base, bc_num exponent, bc_num *resul, size_t scale); 142 143 bool bc_sqrt(bc_num *num, size_t scale); 144 145 void bc_out_num(bc_num num, int o_base, void (* out_char)(char), bool leading_zero); 146 147 /* Prototypes needed for external utility routines. */ 148 #define bc_new_num(length, scale) _bc_new_num_ex((length), (scale), 0) 149 #define bc_free_num(num) _bc_free_num_ex((num), 0) 150 #define bc_num2str(num) bc_num2str_ex((num), (num->n_scale)) 151 152 #endif 153
