/*
    data.h - Part of libsensors, a Linux library for reading sensor data.
    Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl>

    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, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifndef LIB_SENSORS_DATA_H
#define LIB_SENSORS_DATA_H

#include "sensors.h"

/* This header file contains all kinds of data structures which are used
   for the representation of the config file data and the /proc/...
   data. */

/* Kinds of expression operators recognized */
typedef enum sensors_operation { 
  sensors_add, sensors_sub, sensors_multiply, sensors_divide, 
  sensors_negate, sensors_exp, sensors_log } sensors_operation;

/* An expression can have several forms */
typedef enum sensors_expr_kind {
  sensors_kind_val, sensors_kind_source, sensors_kind_var, 
  sensors_kind_sub } sensors_expr_kind;

/* An expression. It is either a floating point value, a variable name,
   an operation on subexpressions, or the special value 'sub' } */
struct sensors_expr;

typedef struct sensors_subexpr {
  sensors_operation op;
  struct sensors_expr *sub1;
  struct sensors_expr *sub2;
} sensors_subexpr;

typedef struct sensors_expr {
  sensors_expr_kind kind;
  union {
    double val;
    char *var;
    sensors_subexpr subexpr;
  } data;
} sensors_expr;

/* Config file label declaration: a feature name, combined with the label
   value */
typedef struct sensors_label {
  char *name;
  char *value;
  int lineno;
} sensors_label;

/* Config file set declaration: a feature name, combined with an expression */
typedef struct sensors_set {
  char *name;
  sensors_expr *value;
  int lineno;
} sensors_set;

/* Config file compute declaration: a feature name, combined with two 
   expressions */
typedef struct sensors_compute {
  char *name;
  sensors_expr *from_proc;
  sensors_expr *to_proc;
  int lineno;
} sensors_compute;

/* Config file ignore declaration: a feature name */
typedef struct sensors_ignore {
  char *name;
  int lineno;
} sensors_ignore;

/* A list of chip names, used to represent a config file chips declaration */
typedef struct sensors_chip_name_list {
  sensors_chip_name *fits;
  int fits_count;
  int fits_max;
} sensors_chip_name_list;

/* A config file chip block */
typedef struct sensors_chip {
  sensors_chip_name_list chips;
  sensors_label *labels;
  int labels_count;
  int labels_max;
  sensors_set *sets;
  int sets_count;
  int sets_max;
  sensors_compute *computes;
  int computes_count;
  int computes_max;
  sensors_ignore *ignores;
  int ignores_count;
  int ignores_max;
  int lineno;
} sensors_chip;

/* Config file bus declaration: the i2c bus number, combined with adapter
   name */
typedef struct sensors_bus {
  int number;
  char *adapter;
  int lineno;
} sensors_bus;

/* Internal data about a single chip feature.
   name is the string name used to refer to this feature (both in config
     files and through user functions);
   number is the internal feature number, used in many functions to refer
     to this feature
   logical_mapping is either SENSORS_NO_MAPPING if this is feature is the
     main element of category; or it is the number of a feature with which
     this feature is logically grouped (a group could be fan, fan_max and
     fan_div)
   compute_mapping is like logical_mapping, only it refers to another
     feature whose compute line will be inherited (a group could be fan and
     fan_max, but not fan_div)
   mode is SENSORS_MODE_NO_RW, SENSORS_MODE_R, SENSORS_MODE_W or
     SENSORS_MODE_RW, for unaccessible, readable, writable, and both readable
     and writable.
   scaling is the number of decimal points to scale by.
     Divide the read value by 10**scaling to get the real value.
     Scaling can be positive or negative but negative values aren't
     very useful because the driver can scale that direction itself. */
typedef struct sensors_chip_feature {
  sensors_feature_data data;
  int scaling;
  const char *sysname;
  int sysscaling;
  const char *altsysname;
} sensors_chip_feature;

/* Internal data about all features of a type of chip */
typedef struct sensors_chip_features {
  const char *prefix;
  struct sensors_chip_feature *feature;
} sensors_chip_features;

extern sensors_chip *sensors_config_chips;
extern int sensors_config_chips_count;
extern int sensors_config_chips_max;

extern sensors_bus *sensors_config_busses;
extern int sensors_config_busses_count;
extern int sensors_config_busses_max;

extern sensors_chip_name *sensors_proc_chips;
extern int sensors_proc_chips_count;
extern int sensors_proc_chips_max;

#define sensors_add_proc_chips(el) sensors_add_array_el( \
	(el), &sensors_proc_chips, &sensors_proc_chips_count,\
	&sensors_proc_chips_max, sizeof(struct sensors_chip_name))

extern sensors_bus *sensors_proc_bus;
extern int sensors_proc_bus_count;
extern int sensors_proc_bus_max;

#define sensors_add_proc_bus(el) sensors_add_array_el( \
	(el), &sensors_proc_bus, &sensors_proc_bus_count,\
	&sensors_proc_bus_max, sizeof(struct sensors_bus))

extern sensors_chip_features sensors_chip_features_list[];

/* this should match the total number of elements in PLACEHOLDER_ELEMENTS */
#define N_PLACEHOLDER_ELEMENTS 10

#endif /* def LIB_SENSORS_DATA_H */