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104 lines
3 KiB
C
104 lines
3 KiB
C
/**
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* \file error.c
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* \brief Error code handling routines
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* \author Jaroslav Kysela <perex@suse.cz>
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* \date 1998-2001
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*
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* Error code handling routines.
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*/
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/*
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* Copyright (c) 1998 by Jaroslav Kysela <perex@suse.cz>
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*
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* snd_strerror routine needs to be recoded for the locale support
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include "local.h"
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/**
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* Array of error codes in US ASCII.
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*/
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static const char *snd_error_codes[] =
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{
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"Sound protocol is not compatible"
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};
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/**
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* \brief Returns the message for an error code.
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* \param errnum The error code number, which must be a system error code
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* or an ALSA error code.
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* \return The ASCII description of the given numeric error code.
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*/
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const char *snd_strerror(int errnum)
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{
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if (errnum < 0)
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errnum = -errnum;
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if (errnum < SND_ERROR_BEGIN)
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return (const char *) strerror(errnum);
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errnum -= SND_ERROR_BEGIN;
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if ((unsigned int) errnum >= sizeof(snd_error_codes) / sizeof(const char *))
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return "Unknown error";
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return snd_error_codes[errnum];
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}
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/**
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* \brief The default error handler function.
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* \param file The filename where the error was hit.
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* \param line The line number.
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* \param function The function name.
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* \param err The error code.
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* \param fmt The message (including the format characters).
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* \param ... Optional arguments.
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*
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* Prints the error message including location to \c stderr.
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*/
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static void snd_lib_error_default(const char *file, int line, const char *function, int err, const char *fmt, ...)
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{
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va_list arg;
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va_start(arg, fmt);
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fprintf(stderr, "ALSA lib %s:%i:(%s) ", file, line, function);
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vfprintf(stderr, fmt, arg);
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if (err)
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fprintf(stderr, ": %s", snd_strerror(err));
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putc('\n', stderr);
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va_end(arg);
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}
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/**
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* \ingroup Error
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* Pointer to the error handler function.
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* For internal use only.
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*/
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snd_lib_error_handler_t snd_lib_error = snd_lib_error_default;
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/**
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* \brief Sets the error handler.
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* \param handler The pointer to the new error handler function.
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*
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* This function sets a new error handler, or (if \c handler is \c NULL)
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* the default one which prints the error messages to \c stderr.
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*/
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int snd_lib_error_set_handler(snd_lib_error_handler_t handler)
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{
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snd_lib_error = handler == NULL ? snd_lib_error_default : handler;
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return 0;
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}
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