src/mp-equation.h

   1 /*
   2  * Copyright (C) 2004-2008 Sami Pietila
   3  * Copyright (C) 2008-2011 Robert Ancell.
   4  *
   5  * This program is free software: you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free Software
   7  * Foundation, either version 2 of the License, or (at your option) any later
   8  * version. See http://www.gnu.org/copyleft/gpl.html the full text of the
   9  * license.
  10  */
  11
  12 #ifndef MP_EQUATION_H
  13 #define MP_EQUATION_H
  14
  15 #include "mp.h"
  16
  17 typedef enum
  18 {
  19     PARSER_ERR_NONE = 0,
  20     PARSER_ERR_INVALID,
  21     PARSER_ERR_OVERFLOW,
  22     PARSER_ERR_UNKNOWN_VARIABLE,
  23     PARSER_ERR_UNKNOWN_FUNCTION,
  24     PARSER_ERR_UNKNOWN_CONVERSION,
  25     PARSER_ERR_MP
  26 } MPErrorCode;
  27
  28 /* Options for parser */
  29 typedef struct {
  30     /* Default number base */
  31     int base;
  32
  33     /* The wordlength for binary operations in bits (e.g. 8, 16, 32) */
  34     int wordlen;
  35
  36     /* Units for angles (e.g. radians, degrees) */
  37     MPAngleUnit angle_units;
  38
  39     // FIXME:
  40     // int enable_builtins;
  41
  42     /* Data to pass to callbacks */
  43     void *callback_data;
  44
  45     /* Function to check if a variable is defined */
  46     int (*variable_is_defined)(const char *name, void *data);
  47
  48     /* Function to get variable values */
  49     int (*get_variable)(const char *name, MPNumber *z, void *data);
  50
  51     /* Function to set variable values */
  52     void (*set_variable)(const char *name, const MPNumber *x, void *data);
  53
  54     /* Function to check if a function is defined */
  55     int (*function_is_defined)(const char *name, void *data);
  56
  57     /* Function to solve functions */
  58     int (*get_function)(const char *name, const MPNumber *x, MPNumber *z, void *data);
  59
  60     /* Function to convert units */
  61     int (*convert)(const MPNumber *x, const char *x_units, const char *z_units, MPNumber *z, void *data);
  62 } MPEquationOptions;
  63
  64 MPErrorCode mp_equation_parse(const char *expression, MPEquationOptions *options, MPNumber *result, char **error_token);
  65 const char *mp_error_code_to_string(MPErrorCode error_code);
  66
  67 int sub_atoi(const char *data);
  68 int super_atoi(const char *data);
  69 #endif