/usr/include/dc1394/log.h is in libdc1394-22-dev 2.2.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* 1394-Based Digital Camera Control Library
*
* Error logging functions
*
* Written by Damien Douxchamps <ddouxchamps@users.sf.net> and
* Rudolf Leitgeb
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/***************************************************************************
* logging facility for libdc1394
*
* These functions provide the logging of error, warning and debug messages
* They allow registering of custom logging functions or the use
* of the builtin loggers which redirect the output to stderr.
* Three log levels are supported:
* error: Indicates that an error has been detected which mandates
* shutdown of the program as soon as feasible
* warning: Indicates that something happened which prevents libdc1394
* from working but which could possibly be resolved by the
* application or the user: plugging in a camera, resetting the
* firewire bus, ....
* debug: A sort of way point for the library. This log level is supposed
* to report that a specific function has been entered or has
* passed a certain stage. This log level is turned off by default
* and may produce a lot of output during regular operation.
* The main purpose for this log level is for debugging libdc1394
* and for generating meaningful problem reports.
***************************************************************************/
#include <dc1394/dc1394.h>
#ifndef __DC1394_LOG_H__
#define __DC1394_LOG_H__
/*! \file dc1394/log.h
\brief Functions to log errors, warning and debug messages
\author Damien Douxchamps: coding
\author Rudolf Leitgeb: coding
\author Peter Antoniac: documentation maintainer
More details soon
*/
/**
* Error codes returned by most libdc1394 functions.
*
* General rule: 0 is success, negative denotes a problem.
*/
typedef enum {
DC1394_SUCCESS = 0,
DC1394_FAILURE = -1,
DC1394_NOT_A_CAMERA = -2,
DC1394_FUNCTION_NOT_SUPPORTED = -3,
DC1394_CAMERA_NOT_INITIALIZED = -4,
DC1394_MEMORY_ALLOCATION_FAILURE = -5,
DC1394_TAGGED_REGISTER_NOT_FOUND = -6,
DC1394_NO_ISO_CHANNEL = -7,
DC1394_NO_BANDWIDTH = -8,
DC1394_IOCTL_FAILURE = -9,
DC1394_CAPTURE_IS_NOT_SET = -10,
DC1394_CAPTURE_IS_RUNNING = -11,
DC1394_RAW1394_FAILURE = -12,
DC1394_FORMAT7_ERROR_FLAG_1 = -13,
DC1394_FORMAT7_ERROR_FLAG_2 = -14,
DC1394_INVALID_ARGUMENT_VALUE = -15,
DC1394_REQ_VALUE_OUTSIDE_RANGE = -16,
DC1394_INVALID_FEATURE = -17,
DC1394_INVALID_VIDEO_FORMAT = -18,
DC1394_INVALID_VIDEO_MODE = -19,
DC1394_INVALID_FRAMERATE = -20,
DC1394_INVALID_TRIGGER_MODE = -21,
DC1394_INVALID_TRIGGER_SOURCE = -22,
DC1394_INVALID_ISO_SPEED = -23,
DC1394_INVALID_IIDC_VERSION = -24,
DC1394_INVALID_COLOR_CODING = -25,
DC1394_INVALID_COLOR_FILTER = -26,
DC1394_INVALID_CAPTURE_POLICY = -27,
DC1394_INVALID_ERROR_CODE = -28,
DC1394_INVALID_BAYER_METHOD = -29,
DC1394_INVALID_VIDEO1394_DEVICE = -30,
DC1394_INVALID_OPERATION_MODE = -31,
DC1394_INVALID_TRIGGER_POLARITY = -32,
DC1394_INVALID_FEATURE_MODE = -33,
DC1394_INVALID_LOG_TYPE = -34,
DC1394_INVALID_BYTE_ORDER = -35,
DC1394_INVALID_STEREO_METHOD = -36,
DC1394_BASLER_NO_MORE_SFF_CHUNKS = -37,
DC1394_BASLER_CORRUPTED_SFF_CHUNK = -38,
DC1394_BASLER_UNKNOWN_SFF_CHUNK = -39
} dc1394error_t;
#define DC1394_ERROR_MIN DC1394_BASLER_UNKNOWN_SFF_CHUNK
#define DC1394_ERROR_MAX DC1394_SUCCESS
#define DC1394_ERROR_NUM (DC1394_ERROR_MAX-DC1394_ERROR_MIN+1)
/**
* Types of logging messages
*
* Three types exist:
* - ERROR for real, hard, unrecoverable errors that will result in the program terminating.
* - WARNING for things that have gone wrong, but are not requiring a termination of the program.
* - DEBUG for debug messages that can be very verbose but may help the developers to fix bugs.
*/
typedef enum {
DC1394_LOG_ERROR=768,
DC1394_LOG_WARNING,
DC1394_LOG_DEBUG
} dc1394log_t;
#define DC1394_LOG_MIN DC1394_LOG_ERROR
#define DC1394_LOG_MAX DC1394_LOG_DEBUG
#define DC1394_LOG_NUM (DC1394_LOG_MAX - DC1394_LOG_MIN + 1)
#if ! defined (_MSC_VER)
/* Error logging/checking macros. Logs an error string on stderr and exit current function
if error is positive. Neg errors are messages and are thus ignored */
/* Some macros to log errors, etc... conditionally */
#define DC1394_WRN(err,message) \
do { \
if ((err>0)||(err<=-DC1394_ERROR_NUM)) \
err=DC1394_INVALID_ERROR_CODE; \
\
if (err!=DC1394_SUCCESS) { \
dc1394_log_warning("%s: in %s (%s, line %d): %s\n", \
dc1394_error_get_string(err), \
__FUNCTION__, __FILE__, __LINE__, message); \
} \
} while (0);
#define DC1394_ERR(err,message) \
do { \
if ((err>0)||(err<=-DC1394_ERROR_NUM)) \
err=DC1394_INVALID_ERROR_CODE; \
\
if (err!=DC1394_SUCCESS) { \
dc1394_log_error("%s: in %s (%s, line %d): %s\n", \
dc1394_error_get_string(err), \
__FUNCTION__, __FILE__, __LINE__, message); \
return; \
} \
} while (0);
#define DC1394_ERR_RTN(err,message) \
do { \
if ((err>0)||(err<=-DC1394_ERROR_NUM)) \
err=DC1394_INVALID_ERROR_CODE; \
\
if (err!=DC1394_SUCCESS) { \
dc1394_log_error("%s: in %s (%s, line %d): %s\n", \
dc1394_error_get_string(err), \
__FUNCTION__, __FILE__, __LINE__, message); \
return err; \
} \
} while (0);
#define DC1394_ERR_CLN(err,cleanup,message) \
do { \
if ((err>0)||(err<=-DC1394_ERROR_NUM)) \
err=DC1394_INVALID_ERROR_CODE; \
\
if (err!=DC1394_SUCCESS) { \
dc1394_log_error("%s: in %s (%s, line %d): %s\n", \
dc1394_error_get_string(err), \
__FUNCTION__, __FILE__, __LINE__, message); \
cleanup; \
return; \
} \
} while (0);
#define DC1394_ERR_CLN_RTN(err,cleanup,message) \
do { \
if ((err>0)||(err<=-DC1394_ERROR_NUM)) \
err=DC1394_INVALID_ERROR_CODE; \
\
if (err!=DC1394_SUCCESS) { \
dc1394_log_error("%s: in %s (%s, line %d): %s\n", \
dc1394_error_get_string(err), \
__FUNCTION__, __FILE__, __LINE__, message); \
cleanup; \
return err; \
} \
} while (0);
#endif /* _MSC_VER */
#ifdef __cplusplus
extern "C" {
#endif
/**
* dc1394_log_register_handler: register log handler for reporting error, warning or debug statements
* Passing NULL as argument turns off this log level.
* @param [in] log_handler: pointer to a function which takes a character string as argument
* type: the type of log
* @param [in] type: message type (\a debug, \a err or \a warning)
* @param [in] message: log message
*/
dc1394error_t dc1394_log_register_handler(dc1394log_t type, void(*log_handler)(dc1394log_t type,
const char *message, void* user), void* user);
/**
* dc1394_log_set_default_handler: set the log handler to the default handler
* At boot time, debug logging is OFF (handler is NULL). Using this function for the debug statements
* will start logging of debug statements usng the default handler.
*/
dc1394error_t dc1394_log_set_default_handler(dc1394log_t type);
/**
* dc1394_log_error: logs a fatal error condition to the registered facility
* This function shall be invoked if a fatal error condition is encountered.
* The message passed as argument is delivered to the registered error reporting
* function registered before.
* @param [in] format,...: error message to be logged, multiple arguments allowed (printf style)
*/
void dc1394_log_error(const char *format,...);
/**
* dc1394_log_warning: logs a nonfatal error condition to the registered facility
* This function shall be invoked if a nonfatal error condition is encountered.
* The message passed as argument is delivered to the registered warning reporting
* function registered before.
* @param [in] format,...: warning message to be logged, multiple arguments allowed (printf style)
*/
void dc1394_log_warning(const char *format,...);
/**
* dc1394_log_debug: logs a debug statement to the registered facility
* This function shall be invoked if a debug statement is to be logged.
* The message passed as argument is delivered to the registered debug reporting
* function registered before ONLY IF the environment variable DC1394_DEBUG has been set before the
* program starts.
* @param [in] format,...: debug statement to be logged, multiple arguments allowed (printf style)
*/
void dc1394_log_debug(const char *format,...);
#ifdef __cplusplus
}
#endif
#endif
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