/*\
 *  libLB - The LBPP support library
 *  Copyright (C) 2001   Anthony Liguori <ajl13@bellatlantic.net>
 *
 *  libLB is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  libLB 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
\*/

#ifndef _LB_H
#define _LB_H

#include <setjmp.h>
#include <stdlib.h>

#include "strings.h"

typedef struct _lb_context_tag LBContext;
#include "devices.h"

typedef enum
{
  STRING,
  DOUBLE,
  HANDLE,
} Type;

typedef struct _label_tag
{
  jmp_buf jmp;
  LBString name;
} Label;

typedef struct _handle_tag
{
  LBDevice *dev;
  void *data;
} LBHandle;

typedef struct _variable_tag
{
  Type type;
  LBString name;

  union
  {
    double db;
    double *db_v;
    LBString str;
    LBString *str_v;
    LBHandle hnd;
    LBHandle *hnd_v;
  } data;
  int rows;
  int columns;
} Variable;

typedef enum
{
  VA_END_SOFT,
  VA_END_HARD,
  VA_END_COMMA
} LBVarArgEnd;

typedef struct _lb_var_arg_tag
{
  int reference;

  union
  {
    Type var_type;
    LBVarArgEnd end_type;
  } type;
  
  union
  {
    LBString str;
    double db;
    Variable *var;
  } data;

  struct _lb_var_arg_tag *next;
} LBVarArg;

typedef struct _lb_context_tag
{
  char *source;

  Variable *vars;
  int vars_size;
  int vars_capacity;

  Label *labels;
  int labels_size;
  int labels_capacity;

  LBDevice *devs;
  int devs_size;
  int devs_capacity;

  LBDeviceClass *dev_class;
  int dev_class_size;
  int dev_class_capacity;

  jmp_buf *jmps;
  int jmps_size;
  int jmps_capacity;
} _LBContext;

void lb_init_cxt(LBContext *cxt, int argc, char **argv, 
		 int num_vars, int num_labels, char *source);
void lb_free_cxt(LBContext *cxt);

int lb_add_var(LBContext *cxt, char *name, Type type, int rows, int columns);
int lb_add_label(LBContext *cxt, char *name);
Variable *lb_lookup_var(LBContext *cxt, char *name);
Label *lb_lookup_label(LBContext *cxt, char *name);

void lb_debug_break(LBContext *cxt, int c_line);

void lb_push_label(LBContext *cxt, jmp_buf *jmp);
void lb_pop_label(LBContext *cxt, jmp_buf *jmp);

// VarArg functions
LBVarArg *lb_va_adds(LBString str, LBVarArg *list);
LBVarArg *lb_va_addd(double d, LBVarArg *list);
LBVarArg *lb_va_addv(Variable *var, LBVarArg *list);
LBVarArg *lb_va_end(LBVarArgEnd type);
void lb_va_destroy(LBVarArg *list);

#include "functions.h"
#include "statements.h"

#endif