init_cond.c

/*****************************************************************************
 * init_cond.:
 *****************************************************************************
 * Copyright (C) 2004 the VideoLAN team
 * $Id: init_cond.c 11664 2005-07-09 06:17:09Z courmisch $
 *
 * Authors: Cyril Deguet <[email protected]>
 *          code from projectM http://xmms-projectm.sourceforge.net
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/



/* Library functions to manipulate initial condition values */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "common.h"
#include "fatal.h"

#include "param_types.h"
#include "expr_types.h"
#include "init_cond_types.h"
#include "init_cond.h"

#include "splaytree_types.h"
#include "splaytree.h"
char init_cond_string_buffer[STRING_BUFFER_SIZE];
int init_cond_string_buffer_index = 0;


void init_cond_to_string(init_cond_t * init_cond);

/* Frees initial condition structure */
void free_init_cond(init_cond_t * init_cond) {
  free(init_cond);
}

/* Evaluate an initial conditon */
void eval_init_cond(init_cond_t * init_cond) {

  if (init_cond == NULL)
    return;
 
  /* Parameter is of boolean type, either a 1 or 0 value integer */

  /* Set matrix flag to zero. This ensures
     its constant value will be used rather than a matrix value 
  */
  init_cond->param->matrix_flag = 0;
  if (init_cond->param->type == P_TYPE_BOOL) {
         if (INIT_COND_DEBUG) printf("init_cond: %s = %d (TYPE BOOL)\n", init_cond->param->name, init_cond->init_val.bool_val); 
         *((int*)init_cond->param->engine_val) = init_cond->init_val.bool_val;
     return;
  }
  
  /* Parameter is an integer type, just like C */
  
  if (init_cond->param->type == P_TYPE_INT) {
         if (INIT_COND_DEBUG) printf("init_cond: %s = %d (TYPE INT)\n", init_cond->param->name, init_cond->init_val.int_val);
         *((int*)init_cond->param->engine_val) = init_cond->init_val.int_val;
     return;
  }

  /* Parameter is of a double type, just like C */

  if (init_cond->param->type == P_TYPE_DOUBLE) {
        if (INIT_COND_DEBUG) printf("init_cond: %s = %f (TYPE DOUBLE)\n", init_cond->param->name, init_cond->init_val.double_val);
        *((double*)init_cond->param->engine_val) = init_cond->init_val.double_val;
    return;
  }

  /* Unknown type of parameter */
  return;
}

/* Creates a new initial condition */
init_cond_t * new_init_cond(param_t * param, value_t init_val) {

  init_cond_t * init_cond;

  init_cond = (init_cond_t*)malloc(sizeof(init_cond_t));
   
  if (init_cond == NULL)
    return NULL;
 
  init_cond->param = param;
  init_cond->init_val = init_val;
  return init_cond;
}

/* WIP */
void init_cond_to_string(init_cond_t * init_cond) {
        
        int string_length;
        char string[MAX_TOKEN_SIZE];
        
        if (init_cond == NULL)
                return;

        /* Create a string "param_name=val" */
        switch (init_cond->param->type) {
                
                case P_TYPE_BOOL:
                        sprintf(string, "%s=%d\n", init_cond->param->name, init_cond->init_val.bool_val);
                        break; 
                case P_TYPE_INT:
                        sprintf(string, "%s=%d\n", init_cond->param->name, init_cond->init_val.int_val);
                        break;
                case P_TYPE_DOUBLE:
                        sprintf(string, "%s=%f\n", init_cond->param->name, init_cond->init_val.double_val);
                        break;
                default:
                        return;
        }               
                
        /* Compute the length of the string */
        string_length = strlen(string);
        
        /* Buffer overflow check */
        if ((init_cond_string_buffer_index + string_length + 1)  > (STRING_BUFFER_SIZE - 1))
                return;
        
        /* Copy the string into the initial condition string buffer */
        
        strncpy(init_cond_string_buffer + init_cond_string_buffer_index, string, string_length);
        
        /* Increment the string buffer, offset by one for the null terminator, which will be
           overwritten by the next call to this function */
        init_cond_string_buffer_index+= string_length + 1;
                
}


char * create_init_cond_string_buffer(splaytree_t * init_cond_tree) {

        if (init_cond_tree == NULL)
                return NULL;
        
        init_cond_string_buffer_index = 0;
        
        splay_traverse(init_cond_to_string, init_cond_tree);
        
        return init_cond_string_buffer;
                
}

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