xref: /freebsd-9.3-release/contrib/ncurses/ncurses/tinfo/getenv_num.c

/****************************************************************************
 * Copyright (c) 1998 Free Software Foundation, Inc.                        *
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/****************************************************************************
 *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
 ****************************************************************************/

/*
 *	getenv_num.c -- obtain a number from the environment
 */

#include <curses.priv.h>

MODULE_ID("$Id: getenv_num.c,v 1.1 1998/09/19 21:30:23 tom Exp $")

int
_nc_getenv_num(const char *name)
{
	char *dst = 0;
	char *src = getenv(name);
	long value;

	if ((src == 0)
	 || (value = strtol(src, &dst, 0)) < 0
	 || (dst == src)
	 || (*dst != '\0')
	 || (int)value < value)
		value = -1;

	return (int) value;
}