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/*
Copyright (C) 2013-2015 Yubico AB
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <u2f-host.h>
#define ERR(name, desc) { name, #name, desc }
typedef struct
{
int rc;
const char *name;
const char *description;
} err_t;
static const err_t errors[] = {
ERR (U2FH_OK, "successful return"),
ERR (U2FH_MEMORY_ERROR, "out of memory or other memory error"),
ERR (U2FH_TRANSPORT_ERROR, "error in transport layer"),
ERR (U2FH_JSON_ERROR, "error in JSON handling"),
ERR (U2FH_BASE64_ERROR, "base64 error"),
ERR (U2FH_NO_U2F_DEVICE, "cannot find U2F device"),
ERR (U2FH_AUTHENTICATOR_ERROR, "authenticator error"),
ERR (U2FH_TIMEOUT_ERROR, "timeout error"),
ERR (U2FH_SIZE_ERROR, "size error, buffer to small"),
};
/**
* u2fh_strerror:
* @err: error code
*
* Convert return code to human readable string explanation of the
* reason for the particular error code.
*
* This string can be used to output a diagnostic message to the user.
*
* This function is one of few in the library that can be used without
* a successful call to u2fh_global_init().
*
* Return value: Returns a pointer to a statically allocated string
* containing an explanation of the error code @err.
**/
const char *
u2fh_strerror (int err)
{
static const char *unknown = "Unknown libu2f-host error";
const char *p;
if (-err < 0 || -err >= (int) (sizeof (errors) / sizeof (errors[0])))
return unknown;
p = errors[-err].description;
if (!p)
p = unknown;
return p;
}
/**
* u2fh_strerror_name:
* @err: error code
*
* Convert return code to human readable string representing the error
* code symbol itself. For example, u2fh_strerror_name(%U2FH_OK)
* returns the string "U2FH_OK".
*
* This string can be used to output a diagnostic message to the user.
*
* This function is one of few in the library that can be used without
* a successful call to u2fh_global_init().
*
* Return value: Returns a pointer to a statically allocated string
* containing a string version of the error code @err, or NULL if
* the error code is not known.
**/
const char *
u2fh_strerror_name (int err)
{
if (-err < 0 || -err >= (int) (sizeof (errors) / sizeof (errors[0])))
return NULL;
return errors[-err].name;
}
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