y_flow_list.c

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/*
 * Ylib Loadrunner function library.
 * Copyright (C) 2005-2014 Floris Kraak <randakar@gmail.com> | <fkraak@ymor.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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef _Y_FLOW_C_
#define _Y_FLOW_C_

#include "y_core.c"

typedef int (y_flow_func)();


struct y_struct_flow
{
    int number;
    char *name;
    y_flow_func *function;
    int weight;            
};


typedef struct y_struct_flow y_flow;


int y_calc_flow_weight_total(y_flow flow_list[], int flow_count)
{
    int i, total = 0;
    for(i=0; i < flow_count; i++)
    {
        y_flow* flow = &flow_list[i];
        total += flow->weight;
    }
    lr_log_message("y_flow: Combined total of weights is: %d", total);
    return total;
}


y_flow* y_choose_flow(y_flow flow_list[], int flow_count)
{
    int i, lowerbound = 0;
    int cursor = 0;
    int roll = y_rand() % y_calc_flow_weight_total(flow_list, flow_count);

    lr_log_message("Roll: %d", roll);

    for(i=0; i < flow_count; i++)
    {
        y_flow *flow = &flow_list[i];
        int weight = flow->weight;
        cursor += weight;

        lr_log_message("weight cursor: %d", cursor);
        if(roll < cursor)
        {
            return flow;
        }
    }
    return NULL;
}

int y_exec_flow(y_flow *chosen_flow)
{
    if(chosen_flow == NULL)
    {
        lr_log_message("Warning: Cannot execute NULL flow.");
    }
    else if(chosen_flow->name == NULL)
    {
        lr_log_message("Warning: Cannot execute a flow without a name!");
    }
    else if(chosen_flow->function == NULL)
    {
        lr_log_message("Warning: Cannot execute NULL flow function for flow %s", chosen_flow->name);
    }
    else
    {       
        y_flow_func *flow_function = chosen_flow->function;
        return flow_function(); // Run the flow.
    }
    return 0;
}

y_flow* y_get_flow_by_name(char *flow_name, y_flow flow_list[], int flow_count)
{
    int i;
    lr_log_message("y_get_flow_by_name(%s)", flow_name);

    for(i=0; i < flow_count; i++)
    {
        y_flow *flow = &flow_list[i];

        //lr_log_message("Found name: %s", flow->name);
        if( strcmp(flow_name, flow->name) == 0 )
        {
            //lr_log_message("Match: %s", flow->name);
            return flow;
        }
    }
    lr_log_message("Name not found: %s", flow_name);
    return NULL;
}

#endif // _Y_FLOW_C_