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230 lines
6.9 KiB
C
230 lines
6.9 KiB
C
/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/* ====================================================================
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* Copyright (c) 1999-2004 Carnegie Mellon University. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* This work was supported in part by funding from the Defense Advanced
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* Research Projects Agency and the National Science Foundation of the
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* United States of America, and the CMU Sphinx Speech Consortium.
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*
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* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
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* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
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* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ====================================================================
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*
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*/
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#ifndef _LIBUTIL_ERR_H_
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#define _LIBUTIL_ERR_H_
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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/* Win32/WinCE DLL gunk */
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#include <sphinxbase/sphinxbase_export.h>
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/**
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* @file err.h
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* @brief Implementation of logging routines.
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*
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* Logging, warning, debug and error message output funtionality is provided in this file.
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* Sphinxbase defines several level of logging messages - INFO, WARNING, ERROR, FATAL. By
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* default output goes to standard error output.
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*
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* Logging is implemented through macros. They take same arguments as printf: format string and
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* values. By default source file name and source line are prepended to the message. Log output
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* could be redirected to any file using err_set_logfp() and err_set_logfile() functions. To disable
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* logging in your application, call err_set_logfp(NULL).
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*
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* It's possible to log multiline info messages, to do that you need to start message with
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* E_INFO and output other lines with E_INFOCONT.
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if 0
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/* Fool Emacs. */
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}
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#endif
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#define E_SYSCALL(stmt, ...) if (stmt) E_FATAL_SYSTEM(__VA_ARGS__);
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#define FILELINE __FILE__ , __LINE__
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/**
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* Exit with non-zero status after error message
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*/
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#define E_FATAL(...) \
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do { \
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err_msg(ERR_FATAL, FILELINE, __VA_ARGS__); \
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exit(EXIT_FAILURE); \
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} while (0)
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/**
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* Print error text; Call perror(""); exit(errno);
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*/
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#define E_FATAL_SYSTEM(...) \
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do { \
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err_msg_system(ERR_FATAL, FILELINE, __VA_ARGS__); \
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exit(EXIT_FAILURE); \
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} while (0)
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/**
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* Print error text; Call perror("");
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*/
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#define E_ERROR_SYSTEM(...) err_msg_system(ERR_ERROR, FILELINE, __VA_ARGS__)
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/**
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* Print error message to error log
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*/
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#define E_ERROR(...) err_msg(ERR_ERROR, FILELINE, __VA_ARGS__)
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/**
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* Print warning message to error log
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*/
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#define E_WARN(...) err_msg(ERR_WARN, FILELINE, __VA_ARGS__)
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/**
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* Print logging information to standard error stream
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*/
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#define E_INFO(...) err_msg(ERR_INFO, FILELINE, __VA_ARGS__)
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/**
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* Continue printing the information to standard error stream
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*/
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#define E_INFOCONT(...) err_msg(ERR_INFOCONT, NULL, 0, __VA_ARGS__)
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/**
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* Print logging information without filename.
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*/
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#define E_INFO_NOFN(...) err_msg(ERR_INFO, NULL, 0, __VA_ARGS__)
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/**
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* Print debugging information to standard error stream.
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*
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* This will only print a message if:
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* 1. Debugging is enabled at compile time
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* 2. The debug level is greater than or equal to \a level
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*
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* Note that for portability reasons the format and arguments must be
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* enclosed in an extra set of parentheses.
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*/
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#ifdef SPHINX_DEBUG
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#define E_DEBUG(level, ...) \
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if (err_get_debug_level() >= level) \
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err_msg(ERR_DEBUG, FILELINE, __VA_ARGS__)
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#define E_DEBUGCONT(level, ...) \
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if (err_get_debug_level() >= level) \
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err_msg(ERR_DEBUG, NULL, 0, __VA_ARGS__)
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#else
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#define E_DEBUG(level,x)
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#define E_DEBUGCONT(level,x)
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#endif
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typedef enum err_e {
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ERR_DEBUG,
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ERR_INFO,
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ERR_INFOCONT,
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ERR_WARN,
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ERR_ERROR,
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ERR_FATAL,
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ERR_MAX
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} err_lvl_t;
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SPHINXBASE_EXPORT void
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err_msg(err_lvl_t lvl, const char *path, long ln, const char *fmt, ...);
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SPHINXBASE_EXPORT void
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err_msg_system(err_lvl_t lvl, const char *path, long ln, const char *fmt, ...);
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SPHINXBASE_EXPORT void
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err_logfp_cb(void * user_data, err_lvl_t level, const char *fmt, ...);
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typedef void (*err_cb_f)(void* user_data, err_lvl_t, const char *, ...);
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/**
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* Sets function to output error messages. Use it to redirect the logging
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* to your application. By default the handler which dumps messages to
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* stderr is set.
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*
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* @param - callback to pass messages too.
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*/
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SPHINXBASE_EXPORT void
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err_set_callback(err_cb_f callback, void *user_data);
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/**
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* Direct all logging to a given filehandle if default logfp callback is set.
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*
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* @param logfp Filehandle to send log messages to, or NULL to disable logging.
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*/
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SPHINXBASE_EXPORT void
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err_set_logfp(FILE *stream);
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/**
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* Get the current logging filehandle.
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*
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* @return Current logging filehandle, NULL if logging is disabled. Initially
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* it returns stderr
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*/
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SPHINXBASE_EXPORT FILE *
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err_get_logfp(void);
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/**
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* Append all log messages to a given file.
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*
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* Previous logging filehandle is closed (unless it was stdout or stderr).
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*
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* @param file File path to send log messages to
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* @return 0 for success, <0 for failure (e.g. if file does not exist)
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*/
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SPHINXBASE_EXPORT int
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err_set_logfile(const char *path);
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/**
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* Set debugging verbosity level.
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*
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* Note that debugging messages are only enabled when compiled with -DDEBUG.
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*
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* @param level Verbosity level to set, or 0 to disable debug messages.
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*/
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SPHINXBASE_EXPORT
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int err_set_debug_level(int level);
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/**
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* Get debugging verbosity level.
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*
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* Note that debugging messages are only enabled when compiled with -DDEBUG.
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*/
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SPHINXBASE_EXPORT
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int err_get_debug_level(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* !_ERR_H */
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