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/*!
\file lib/db/dbmi_base/alloc.c
\brief DBMI Library (base) - allocate memory
(C) 1999-2009, 2011 by the GRASS Development Team
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.
\author Joel Jones (CERL/UIUC), Radim Blazek
\author Doxygenized by Martin Landa <landa.martin gmail.com> (2011)
*/
#include <string.h>
#include <stdlib.h>
#include <grass/dbmi.h>
/*!
\brief Make a copy of string buffer
Allocated string buffer should be freed by db_free().
\param s source string buffer
\return allocated string buffer
*/
char *db_store(const char *s)
{
char *a;
a = db_malloc(strlen(s) + 1);
if (a)
strcpy(a, s);
return a;
}
/*!
\brief Allocate memory
On failure is called db_memory_error().
\param n number of bytes to be allocated
\return pointer to allocated memory
*/
void *db_malloc(int n)
{
void *s;
if (n <= 0)
n = 1;
s = malloc((unsigned int)n);
if (s == NULL)
db_memory_error();
return s;
}
/*!
\brief Allocate memory
On failure is called db_memory_error().
\param n number of entities
\param m entity size
\return pointer to allocated memory
*/
void *db_calloc(int n, int m)
{
void *s;
if (n <= 0)
n = 1;
if (m <= 0)
m = 1;
s = calloc((unsigned int)n, (unsigned int)m);
if (s == NULL)
db_memory_error();
return s;
}
/*!
\brief Reallocate memory
On failure is called db_memory_error().
\param s pointer to memory
\param n number of newly allocated bytes
\return pointer to allocated memory
*/
void *db_realloc(void *s, int n)
{
if (n <= 0)
n = 1;
if (s == NULL)
s = malloc((unsigned int)n);
else
s = realloc(s, (unsigned int)n);
if (s == NULL)
db_memory_error();
return s;
}
/*!
\brief Free allocated memory
\param s pointer to memory to be freed
*/
void db_free(void *s)
{
free(s);
}
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