/* Copyright (C) 2001-2021 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
   CA 94945, U.S.A., +1(415)492-9861, for further information.
*/


/* Interface to platform-specific getenv routine */

#ifndef gpgetenv_INCLUDED
#  define gpgetenv_INCLUDED

/*
 * Get a value from the environment (getenv).
 *
 * If the key is missing, set *ptr = 0 (if *plen > 0), set *plen = 1,
 * and return 1.
 *
 * If the key is present and the length len of the value (not counting
 * the terminating \0) is less than *plen, copy the value to ptr, set
 * *plen = len + 1, and return 0.
 *
 * If the key is present and len >= *plen, set *plen = len + 1,
 * don't store anything at ptr, and return -1.
 *
 * Note that *plen is the size of the buffer, not the length of the string:
 * because of the terminating \0, the maximum string length is 1 less than
 * the size of the buffer.
 */
int gp_getenv(const char *key, char *ptr, int *plen);

#endif /* gpgetenv_INCLUDED */
