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130<
* 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef ERROR_H
#define ERROR_H
#include "command.h"
/* To achieve C99 printf compatibility in MinGW, gnu_printf should be
* used for __attribute__((format( ... ))), with GCC v4.4 or later
*/
#if (defined(IS_MINGW) && (((__GNUC__ << 16) + __GNUC_MINOR__) >= 0x00040004))
#define PRINTF_ATTRIBUTE_FORMAT gnu_printf
#else
#define PRINTF_ATTRIBUTE_FORMAT printf
#endif
/* logging priorities
* LOG_LVL_SILENT - turn off all output. In lieu of try + catch this can be used as a
* feeble ersatz.
* LOG_LVL_USER - user messages. Could be anything from information
* to progress messags. These messages do not represent
* incorrect or unexpected behaviour, just normal execution.
* LOG_LVL_ERROR - fatal errors, that are likely to cause program abort
* LOG_LVL_WARNING - non-fatal errors, that may be resolved later
* LOG_LVL_INFO - state information, etc.
* LOG_LVL_DEBUG - debug statements, execution trace
*/
enum log_levels
{
LOG_LVL_SILENT = -3,
LOG_LVL_OUTPUT = -2,
LOG_LVL_USER = -1,
LOG_LVL_ERROR = 0,
LOG_LVL_WARNING = 1,
LOG_LVL_INFO = 2,
LOG_LVL_DEBUG = 3
};
void log_printf(enum log_levels level, const char *file, unsigned line,
const char *function, const char *format, ...)
__attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 5, 6)));
void log_printf_lf(enum log_levels level, const char *file, unsigned line,
const char *function, const char *format, ...)
__attribute__ ((format (PRINTF_ATTRIBUTE_FORMAT, 5, 6)));
int log_init(struct command_context *cmd_ctx);
int set_log_output(struct command_context *cmd_ctx, FILE *output);
int log_register_commands(struct command_context *cmd_ctx);
void keep_alive(void);
void kept_alive(void);
void alive_sleep(uint64_t ms);
void busy_sleep(uint64_t ms);
/* log entries can be paused and replayed roughly according to the try/catch/rethrow
* concepts in C++
*/
void log_try(void);
void log_catch(void);
void log_rethrow(void);
typedef void (*log_callback_fn)(void *priv, const char *file, unsigned line,
const char *function, const char *string);
struct log_callback {
log_callback_fn fn;
void *priv;
struct log_callback *next;
};
int log_add_callback(log_callback_fn fn, void *priv);
int log_remove_callback(log_callback_fn fn, void *priv);
char *alloc_vprintf(const char *fmt, va_list ap);
char *alloc_printf(const char *fmt, ...);
extern int debug_level;
/* Avoid fn call and building parameter list if we're not outputting the information.
* Matters on feeble CPUs for DEBUG/INFO statements that are involved frequently */
#define LOG_LEVEL_IS(FOO) ((debug_level) >= (FOO))
#define LOG_DEBUG(expr ...) \
((debug_level >= LOG_LVL_DEBUG) ? log_printf_lf (LOG_LVL_DEBUG, __FILE__, __LINE__, __FUNCTION__, expr) , 0 : 0)
#define LOG_INFO(expr ...) \
log_printf_lf (LOG_LVL_INFO, __FILE__, __LINE__, __FUNCTION__, expr)
#define LOG_INFO_N(expr ...) \
log_printf (LOG_LVL_INFO, __FILE__, __LINE__, __FUNCTION__, expr)
#define LOG_WARNING(expr ...) \
log_printf_lf (LOG_LVL_WARNING, __FILE__, __LINE__, __FUNCTION__, expr)
#define LOG_ERROR(expr ...) \
log_printf_lf (LOG_LVL_ERROR, __FILE__, __LINE__, __FUNCTION__, expr)
#define LOG_USER(expr ...) \
log_printf_lf (LOG_LVL_USER, __FILE__, __LINE__, __FUNCTION__, expr)
#define LOG_USER_N(expr ...) \
log_printf (LOG_LVL_USER, __FILE__, __LINE__, __FUNCTION__, expr)
#define LOG_OUTPUT(expr ...) \
log_printf (LOG_LVL_OUTPUT, __FILE__, __LINE__, __FUNCTION__, expr)
/* general failures
* error codes < 100
*/
#define ERROR_OK (0)
#define ERROR_INVALID_ARGUMENTS ERROR_COMMAND_SYNTAX_ERROR
#define ERROR_NO_CONFIG_FILE (-2)
#define ERROR_BUF_TOO_SMALL (-3)
/* see "Error:" log entry for meaningful message to the user. The caller should
* make no assumptions about what went wrong and try to handle the problem.
*/
#define ERROR_FAIL (-4)
#endif /* LOG_H */
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