logging.h

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00001 /*
00002  * SpanDSP - a series of DSP components for telephony
00003  *
00004  * logging.h - definitions for error and debug logging.
00005  *
00006  * Written by Steve Underwood <steveu@coppice.org>
00007  *
00008  * Copyright (C) 2005 Steve Underwood
00009  *
00010  * All rights reserved.
00011  *
00012  * This program is free software; you can redistribute it and/or modify
00013  * it under the terms of the GNU Lesser General Public License version 2.1,
00014  * as published by the Free Software Foundation.
00015  *
00016  * This program is distributed in the hope that it will be useful,
00017  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  * GNU Lesser General Public License for more details.
00020  *
00021  * You should have received a copy of the GNU Lesser General Public
00022  * License along with this program; if not, write to the Free Software
00023  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00024  */
00025 
00026 /*! \file */
00027 
00028 /*! \page logging_page Logging
00029 \section logging_page_sec_1 What does it do?
00030 ???.
00031 */
00032 
00033 #if !defined(_SPANDSP_LOGGING_H_)
00034 #define _SPANDSP_LOGGING_H_
00035 
00036 /*! General logging function for spandsp logging. */
00037 typedef void (*message_handler_func_t)(int level, const char *text);
00038 
00039 /*! Error logging function for spandsp logging. */
00040 typedef void (*error_handler_func_t)(const char *text);
00041 
00042 /* Logging elements */
00043 enum
00044 {
00045     SPAN_LOG_SEVERITY_MASK              = 0x00FF,
00046     SPAN_LOG_SHOW_DATE                  = 0x0100,
00047     SPAN_LOG_SHOW_SAMPLE_TIME           = 0x0200,
00048     SPAN_LOG_SHOW_SEVERITY              = 0x0400,
00049     SPAN_LOG_SHOW_PROTOCOL              = 0x0800,
00050     SPAN_LOG_SHOW_VARIANT               = 0x1000,
00051     SPAN_LOG_SHOW_TAG                   = 0x2000,
00052     SPAN_LOG_SUPPRESS_LABELLING         = 0x8000
00053 };
00054 
00055 /* Logging severity levels */
00056 enum
00057 {
00058     SPAN_LOG_NONE                       = 0,
00059     SPAN_LOG_ERROR                      = 1,
00060     SPAN_LOG_WARNING                    = 2,
00061     SPAN_LOG_PROTOCOL_ERROR             = 3,
00062     SPAN_LOG_PROTOCOL_WARNING           = 4,
00063     SPAN_LOG_FLOW                       = 5,
00064     SPAN_LOG_FLOW_2                     = 6,
00065     SPAN_LOG_FLOW_3                     = 7,
00066     SPAN_LOG_DEBUG                      = 8,
00067     SPAN_LOG_DEBUG_2                    = 9,
00068     SPAN_LOG_DEBUG_3                    = 10
00069 };
00070 
00071 /*!
00072     Logging descriptor. This defines the working state for a single instance of
00073     the logging facility for spandsp.
00074 */
00075 typedef struct logging_state_s logging_state_t;
00076 
00077 #if defined(__cplusplus)
00078 extern "C"
00079 {
00080 #endif
00081 
00082 /*! Test if logging of a specified severity level is enabled.
00083     \brief Test if logging of a specified severity level is enabled.
00084     \param s The logging context.
00085     \param level The severity level to be tested.
00086     \return TRUE if logging is enable, else FALSE.
00087 */
00088 SPAN_DECLARE(int) span_log_test(logging_state_t *s, int level);
00089 
00090 /*! Generate a log entry.
00091     \brief Generate a log entry.
00092     \param s The logging context.
00093     \param level The severity level of the entry.
00094     \param format ???
00095     \return 0 if no output generated, else 1.
00096 */
00097 SPAN_DECLARE(int) span_log(logging_state_t *s, int level, const char *format, ...);
00098 
00099 /*! Generate a log entry displaying the contents of a buffer.
00100     \brief Generate a log entry displaying the contents of a buffer
00101     \param s The logging context.
00102     \param level The severity level of the entry.
00103     \param tag A label for the log entry.
00104     \param buf The buffer to be dumped to the log.
00105     \param len The length of buf.
00106     \return 0 if no output generated, else 1.
00107 */
00108 SPAN_DECLARE(int) span_log_buf(logging_state_t *s, int level, const char *tag, const uint8_t *buf, int len);
00109 
00110 SPAN_DECLARE(int) span_log_set_level(logging_state_t *s, int level);
00111 
00112 SPAN_DECLARE(int) span_log_set_tag(logging_state_t *s, const char *tag);
00113 
00114 SPAN_DECLARE(int) span_log_set_protocol(logging_state_t *s, const char *protocol);
00115 
00116 SPAN_DECLARE(int) span_log_set_sample_rate(logging_state_t *s, int samples_per_second);
00117 
00118 SPAN_DECLARE(int) span_log_bump_samples(logging_state_t *s, int samples);
00119 
00120 SPAN_DECLARE(void) span_log_set_message_handler(logging_state_t *s, message_handler_func_t func);
00121 
00122 SPAN_DECLARE(void) span_log_set_error_handler(logging_state_t *s, error_handler_func_t func);
00123 
00124 SPAN_DECLARE(void) span_set_message_handler(message_handler_func_t func);
00125 
00126 SPAN_DECLARE(void) span_set_error_handler(error_handler_func_t func);
00127 
00128 SPAN_DECLARE(logging_state_t *) span_log_init(logging_state_t *s, int level, const char *tag);
00129 
00130 SPAN_DECLARE(int) span_log_release(logging_state_t *s);
00131 
00132 SPAN_DECLARE(int) span_log_free(logging_state_t *s);
00133 
00134 #if defined(__cplusplus)
00135 }
00136 #endif
00137 
00138 #endif
00139 /*- End of file ------------------------------------------------------------*/

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