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/* -*-pgsql-c-*- */
/*
* $Header: /cvsroot/pgpool/pgpool-II/pool_params.c,v 1.2 2007/01/04 17:27:10 devrim Exp $
*
* pgpool: a language independent connection pool server for PostgreSQL
* written by Tatsuo Ishii
*
* Copyright (c) 2003-2007 PgPool Global Development Group
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that the above copyright notice appear in all
* copies and that both that copyright notice and this permission
* notice appear in supporting documentation, and that the name of the
* author not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. The author makes no representations about the
* suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* params.c: Paramter Status handling routines
*
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "pool.h"
#define MAX_PARAM_ITEMS 128
/*
* initialize parameter structure
*/
int pool_init_params(ParamStatus *params)
{
params->num = 0;
params->names = malloc(MAX_PARAM_ITEMS*sizeof(char *));
if (params->names == NULL)
{
pool_error("pool_init_params: cannot allocate memory");
return -1;
}
params->values = malloc(MAX_PARAM_ITEMS*sizeof(char *));
if (params->values == NULL)
{
pool_error("pool_init_params: cannot allocate memory");
return -1;
}
return 0;
}
/*
* discard parameter structure
*/
void pool_discard_params(ParamStatus *params)
{
int i;
for (i=0;i<params->num;i++)
{
free(params->names[i]);
free(params->values[i]);
}
free(params->names);
free(params->values);
}
/*
* find param value by name. if found, its value is returned
* also, pos is set
* if not found, NULL is returned
*/
char *pool_find_name(ParamStatus *params, char *name, int *pos)
{
int i;
for (i=0;i<params->num;i++)
{
if (!strcmp(name, params->names[i]))
{
*pos = i;
return params->values[i];
}
}
return NULL;
}
/*
* return name and value by index.
*/
int pool_get_param(ParamStatus *params, int index, char **name, char **value)
{
if (index < 0 || index >= params->num)
return -1;
*name = params->names[index];
*value = params->values[index];
return 0;
}
/*
* add or replace name/value pair
*/
int pool_add_param(ParamStatus *params, char *name, char *value)
{
int pos;
if (pool_find_name(params, name, &pos))
{
/* name already exists */
if (strlen(params->values[pos]) < strlen(value))
{
params->values[pos] = realloc(params->values[pos], strlen(value) + 1);
if (params->values[pos] == NULL)
{
pool_error("pool_init_params: cannot allocate memory");
return -1;
}
}
strcpy(params->values[pos], value);
}
else
{
int num;
/* add name/value pair */
if (params->num >= MAX_PARAM_ITEMS)
{
pool_error("pool_add_param: no more room for num");
return -1;
}
num = params->num;
params->names[num] = strdup(name);
if (params->names[num] == NULL)
{
pool_error("pool_init_params: cannot allocate memory");
return -1;
}
params->values[num] = strdup(value);
if (params->values[num] == NULL)
{
pool_error("pool_init_params: cannot allocate memory");
return -1;
}
params->num++;
}
return 0;
}
void pool_param_debug_print(ParamStatus *params)
{
int i;
for (i=0;i<params->num;i++)
{
pool_debug("No.%d: name: %s value: %s", i, params->names[i], params->values[i]);
}
}
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