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Diffstat (limited to 'src/number.h')
| -rw-r--r-- | src/number.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/number.h b/src/number.h new file mode 100644 index 0000000..9f5e5a7 --- /dev/null +++ b/src/number.h @@ -0,0 +1,169 @@ +/* number.h: Arbitrary precision numbers header file. */ +/* + Copyright (C) 1991, 1992, 1993, 1994, 1997, 2000 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License , or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. If not, write to: + + The Free Software Foundation, Inc. + 59 Temple Place, Suite 330 + Boston, MA 02110-1301 USA. + + + You may contact the author by: + e-mail: [email protected] + us-mail: Philip A. Nelson + Computer Science Department, 9062 + Western Washington University + Bellingham, WA 98226-9062 + +*************************************************************************/ + +#ifndef _NUMBER_H_ +#define _NUMBER_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#undef _PROTOTYPE + +#ifndef NUMBER__STDC__ +#define NUMBER__STDC__ +#endif + +typedef enum {PLUS, MINUS} sign; + +typedef struct bc_struct *bc_num; + +typedef struct bc_struct + { + sign n_sign; + int n_len; /* The number of digits before the decimal point. */ + int n_scale; /* The number of digits after the decimal point. */ + int n_refs; /* The number of pointers to this number. */ + bc_num n_next; /* Linked list for available list. */ + char *n_ptr; /* The pointer to the actual storage. + If NULL, n_value points to the inside of + another number (bc_multiply...) and should + not be "freed." */ + char *n_value; /* The number. Not zero char terminated. + May not point to the same place as n_ptr as + in the case of leading zeros generated. */ + } bc_struct; + + +/* The base used in storing the numbers in n_value above. + Currently this MUST be 10. */ + +#define BASE 10 + +/* Some useful macros and constants. */ + +#define CH_VAL(c) (c - '0') +#define BCD_CHAR(d) (d + '0') + +#ifdef MIN +#undef MIN +#undef MAX +#endif +#define MAX(a,b) ((a)>(b)?(a):(b)) +#define MIN(a,b) ((a)>(b)?(b):(a)) +#define ODD(a) ((a)&1) + +#ifndef TRUE +#define TRUE 1 +#define FALSE 0 +#endif + +#ifndef LONG_MAX +#define LONG_MAX 0x7ffffff +#endif + + +/* Global numbers. */ +extern bc_num _zero_; +extern bc_num _one_; +extern bc_num _two_; + + +/* Function Prototypes */ + +/* Define the _PROTOTYPE macro if it is needed. */ + +#ifndef _PROTOTYPE +#ifdef NUMBER__STDC__ +#define _PROTOTYPE(func, args) func args +#else +#define _PROTOTYPE(func, args) func() +#endif +#endif + +_PROTOTYPE(void bc_init_numbers, (void)); + +_PROTOTYPE(bc_num bc_new_num, (int length, int scale)); + +_PROTOTYPE(void bc_free_num, (bc_num *num)); + +_PROTOTYPE(bc_num bc_copy_num, (bc_num num)); + +_PROTOTYPE(void bc_init_num, (bc_num *num)); + +_PROTOTYPE(void bc_str2num, (bc_num *num, char *str, int scale)); + +_PROTOTYPE(char *bc_num2str, (bc_num num)); + +_PROTOTYPE(void bc_int2num, (bc_num *num, int val)); + +_PROTOTYPE(long bc_num2long, (bc_num num)); + +_PROTOTYPE(int bc_compare, (bc_num n1, bc_num n2)); + +_PROTOTYPE(char bc_is_zero, (bc_num num)); + +_PROTOTYPE(char bc_is_near_zero, (bc_num num, int scale)); + +_PROTOTYPE(char bc_is_neg, (bc_num num)); + +_PROTOTYPE(void bc_add, (bc_num n1, bc_num n2, bc_num *result, int scale_min)); + +_PROTOTYPE(void bc_sub, (bc_num n1, bc_num n2, bc_num *result, int scale_min)); + +_PROTOTYPE(void bc_multiply, (bc_num n1, bc_num n2, bc_num *prod, int scale)); + +_PROTOTYPE(int bc_divide, (bc_num n1, bc_num n2, bc_num *quot, int scale)); + +_PROTOTYPE(int bc_modulo, (bc_num num1, bc_num num2, bc_num *result, + int scale)); + +_PROTOTYPE(int bc_divmod, (bc_num num1, bc_num num2, bc_num *quot, + bc_num *rem, int scale)); + +_PROTOTYPE(int bc_raisemod, (bc_num base, bc_num expo, bc_num mod, + bc_num *result, int scale)); + +_PROTOTYPE(void bc_raise, (bc_num num1, bc_num num2, bc_num *result, + int scale)); + +_PROTOTYPE(int bc_sqrt, (bc_num *num, int scale)); + +_PROTOTYPE(void bc_out_num, (bc_num num, int o_base, void (* out_char)(int), + int leading_zero)); + +#ifdef __cplusplus +} +#endif + +#endif + +// vim: set et sw=2 ts=8: |