## root/include/fxp.h

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## INCLUDED FROM

    /* Fixed point math header.
       Rick Smereka, Copyright (C) 2002.

       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; if not, get a copy via the Internet at
       http://gnu.org/copyleft/gpl.html or write to the Free Software
       Foundation, Inc., 59 Temple Place, Suite 330, Boston,
       MA 02111-1307 USA

       You can contact the author via email at rsmereka@future-lab.com

       Original Linux version Apr/2002, Rick Smereka

       Ported to 32-bit Windows. May/2002, Rick Smereka

       Ported to DOS and QNX 4.x. Jul/2002, Rick Smereka

       Added prototype 'fxp_remove_decimal'. Aug/2002, Rick Smereka

       Ported to Debian Linux. Nov/2002, Rick Smereka */

    /* fixed point storage structure */

    struct fxp
       {
       char *charval;
       long val;
       int scale;
       };

    /* math operations */

    #define FXP_OP_ADD 1
    #define FXP_OP_SUB 2
    #define FXP_OP_MUL 3
    #define FXP_OP_DIV 4
    #define FXP_OP_EQ 5
    #define FXP_OP_LT 6
    #define FXP_OP_GT 7
    #define FXP_OP_LE 8
    #define FXP_OP_GE 9

    /* misc defines */

    #define FXP_DEFAULT -1
    #define FXP_OT_NULL ((struct fxp *)NULL)

    #ifdef __cplusplus
    extern "C"
    {
    #endif

    struct fxp *fxp_iconv(char *);
    int fxp_oconv(struct fxp *, int, char *);
    struct fxp *fxp_add(struct fxp *, struct fxp *);
    struct fxp *fxp_sub(struct fxp *, struct fxp *);
    struct fxp *fxp_mul(struct fxp *, struct fxp *);
    struct fxp *fxp_div(struct fxp *, struct fxp *);
    int fxp_eq(struct fxp *, struct fxp *);
    int fxp_lt(struct fxp *, struct fxp *);
    int fxp_gt(struct fxp *, struct fxp *);
    int fxp_le(struct fxp *, struct fxp *);
    int fxp_ge(struct fxp *, struct fxp *);
    int fxp_scale(struct fxp *, int);
    void fxp_free(struct fxp *);
    struct fxp *fxp_dup(struct fxp *);
    void fxp_debug(struct fxp *);
    void fxp_remove_decimal(char *, char *);

    #ifdef __cplusplus
    }
    #endif

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