nghttp2/src/xsi_strerror.h

/*
 * nghttp2 - HTTP/2 C Library
 *
 * Copyright (c) 2016 Tatsuhiro Tsujikawa
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#ifndef XSI_STRERROR_H
#define XSI_STRERROR_H

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif /* HAVE_CONFIG_H */

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/* Looks like error message is quite small, but we really don't know
   how much longer they become. */
#define STRERROR_BUFSIZE 256

/*
 * Returns description of error denoted by |errnum|.  The description
 * is written in |buf| of length |buflen| including terminal NULL.  If
 * there is an error, including the case that buffer space is not
 * sufficient to include error message, and |buflen| > 0, empty string
 * is written to |buf|.  This function returns |buf|.
 */
char *xsi_strerror(int errnum, char *buf, size_t buflen);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* XSI_STRERROR_H */