1 /*****************************************************************************
2 * intf_msg.c: messages interface
3 * This library provides basic functions for threads to interact with user
4 * interface, such as message output. See config.h for output configuration.
5 *****************************************************************************
6 * Copyright (C) 1998, 1999, 2000 VideoLAN
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
30 #include <errno.h> /* errno */
31 #include <fcntl.h> /* O_CREAT, O_TRUNC, O_WRONLY, O_SYNC */
32 #include <stdio.h> /* required */
33 #include <stdarg.h> /* va_list for BSD */
34 #include <stdlib.h> /* malloc() */
35 #include <string.h> /* strerror() */
36 #include <unistd.h> /* close(), write() */
44 #include "interface.h"
45 #include "intf_console.h"
49 /*****************************************************************************
51 *****************************************************************************
52 * Store a single message. Messages have a maximal size of INTF_MSG_MSGSIZE.
53 * If DEBUG is defined, messages have a date field and debug messages are
54 * printed with a date to allow more precise profiling.
55 *****************************************************************************/
58 int i_type; /* message type, see below */
59 char * psz_msg; /* the message itself */
62 /* Debugging informations - in DEBUG mode, debug messages have calling
63 * location informations printed */
64 mtime_t date; /* date of the message */
65 char * psz_file; /* file in which the function was called */
66 char * psz_function; /* function from which the function was called */
67 int i_line; /* line at which the function was called */
72 #define INTF_MSG_STD 0 /* standard message */
73 #define INTF_MSG_ERR 1 /* error message */
74 #define INTF_MSG_INTF 2 /* interface message */
75 #define INTF_MSG_DBG 3 /* debug message */
76 #define INTF_MSG_WARN 4 /* warning message*/
79 /*****************************************************************************
81 *****************************************************************************
82 * Store all data requiered by messages interfaces. It has a single reference
84 *****************************************************************************/
85 typedef struct intf_msg_s
89 vlc_mutex_t lock; /* message queue lock */
90 int i_count; /* number of messages stored */
91 intf_msg_item_t msg[INTF_MSG_QSIZE]; /* message queue */
96 FILE * p_log_file; /* log file */
99 #if !defined(INTF_MSG_QUEUE) && !defined(DEBUG_LOG)
100 /* If neither messages queue, neither log file is used, then the structure
101 * is empty. However, empty structures are not allowed in C. Therefore, a
102 * dummy integer is used to fill it. */
103 int i_dummy; /* unused filler */
105 // int i_warning_level;
108 /*****************************************************************************
110 *****************************************************************************/
112 static void QueueMsg ( intf_msg_t *p_msg, int i_type,
113 char *psz_format, va_list ap );
114 static void PrintMsg ( intf_msg_item_t *p_msg );
116 static void QueueDbgMsg ( intf_msg_t *p_msg, char *psz_file,
117 char *psz_function, int i_line,
118 char *psz_format, va_list ap );
120 #ifdef INTF_MSG_QUEUE
121 static void FlushLockedMsg ( intf_msg_t *p_msg );
125 /*****************************************************************************
126 * intf_MsgCreate: initialize messages interface (ok ?)
127 *****************************************************************************
128 * This functions has to be called before any call to other intf_*Msg functions.
129 * It set up the locks and the message queue if it is used.
130 *****************************************************************************/
131 p_intf_msg_t intf_MsgCreate( void )
135 /* Allocate structure */
136 p_msg = malloc( sizeof( intf_msg_t ) );
143 #ifdef INTF_MSG_QUEUE
144 /* Message queue initialization */
145 vlc_mutex_init( &p_msg->lock ); /* intialize lock */
146 p_msg->i_count = 0; /* queue is empty */
151 /* Log file initialization - on failure, file pointer will be null,
152 * and no log will be issued, but this is not considered as an
154 p_msg->p_log_file = fopen( DEBUG_LOG, "w" );
160 /*****************************************************************************
161 * intf_MsgDestroy: free resources allocated by intf_InitMsg (ok ?)
162 *****************************************************************************
163 * This functions prints all messages remaining in queue, then free all the
164 * resources allocated by intf_InitMsg.
165 * No other messages interface functions should be called after this one.
166 *****************************************************************************/
167 void intf_MsgDestroy( void )
169 intf_FlushMsg(); /* print all remaining messages */
172 /* Close log file if any */
173 if( p_main->p_msg->p_log_file != NULL )
175 fclose( p_main->p_msg->p_log_file );
180 free( p_main->p_msg );
183 /*****************************************************************************
184 * intf_Msg: print a message (ok ?)
185 *****************************************************************************
186 * This function queue a message for later printing, or print it immediately
187 * if the queue isn't used.
188 *****************************************************************************/
189 void intf_Msg( char *psz_format, ... )
193 va_start( ap, psz_format );
194 QueueMsg( p_main->p_msg, INTF_MSG_STD, psz_format, ap );
198 /*****************************************************************************
199 * intf_ErrMsg : print an error message (ok ?)
200 *****************************************************************************
201 * This function is the same as intf_Msg, except that it prints its messages
203 *****************************************************************************/
204 void intf_ErrMsg( char *psz_format, ... )
208 va_start( ap, psz_format );
209 QueueMsg( p_main->p_msg, INTF_MSG_ERR, psz_format, ap );
213 /*****************************************************************************
214 * intf_WarnMsg : print a warning message
215 *****************************************************************************
216 * This function is the same as intf_Msg, except that it concerns warning
217 * messages for testing purpose.
218 *****************************************************************************/
219 void intf_WarnMsg( int i_level, char *psz_format, ... )
223 if( i_level >= p_main->p_intf->i_warning_level )
225 va_start( ap, psz_format );
226 QueueMsg( p_main->p_msg, INTF_MSG_WARN, psz_format, ap );
232 /*****************************************************************************
233 * intf_IntfMsg : print an interface message (ok ?)
234 *****************************************************************************
235 * In opposition to all other intf_*Msg function, this function does not print
236 * it's message on default terminal (stdout or stderr), but send it to
237 * interface (in fact to the X11 console). This means that the interface MUST
238 * be initialized and a X11 console openned before this function is used, and
239 * that once the console is closed, this call is vorbidden.
240 * Practically, only the interface thread itself should call this function, and
241 * flush all messages before intf_CloseX11Console() is called.
242 *****************************************************************************/
243 void intf_IntfMsg(char *psz_format, ...)
247 va_start( ap, psz_format );
248 QueueMsg( p_main->p_msg, INTF_MSG_INTF, psz_format, ap );
252 /*****************************************************************************
253 * _intf_DbgMsg: print a debugging message (ok ?)
254 *****************************************************************************
255 * This function prints a debugging message. Compared to other intf_*Msg
256 * functions, it is only defined if DEBUG is defined and require a file name,
257 * a function name and a line number as additionnal debugging informations. It
258 * also prints a debugging header for each received line.
259 *****************************************************************************/
261 void _intf_DbgMsg( char *psz_file, char *psz_function, int i_line,
262 char *psz_format, ...)
266 va_start( ap, psz_format );
267 QueueDbgMsg( p_main->p_msg, psz_file, psz_function, i_line,
273 /*****************************************************************************
274 * intf_MsgImm: print a message (ok ?)
275 *****************************************************************************
276 * This function prints a message immediately. If the queue is used, all
277 * waiting messages are also printed.
278 *****************************************************************************/
279 void intf_MsgImm( char *psz_format, ... )
283 va_start( ap, psz_format );
284 QueueMsg( p_main->p_msg, INTF_MSG_STD, psz_format, ap );
289 /*****************************************************************************
290 * intf_ErrMsgImm: print an error message immediately (ok ?)
291 *****************************************************************************
292 * This function is the same as intf_MsgImm, except that it prints its message
294 *****************************************************************************/
295 void intf_ErrMsgImm(char *psz_format, ...)
299 va_start( ap, psz_format );
300 QueueMsg( p_main->p_msg, INTF_MSG_ERR, psz_format, ap );
305 /*****************************************************************************
306 * intf_WarnMsgImm : print a warning message
307 *****************************************************************************
308 * This function is the same as intf_MsgImm, except that it concerns warning
309 * messages for testing purpose.
310 *****************************************************************************/
311 void intf_WarnMsgImm( int i_level, char *psz_format, ... )
315 if( i_level >= p_main->p_intf->i_warning_level )
317 va_start( ap, psz_format );
318 QueueMsg( p_main->p_msg, INTF_MSG_WARN, psz_format, ap );
326 /*****************************************************************************
327 * _intf_DbgMsgImm: print a debugging message immediately (ok ?)
328 *****************************************************************************
329 * This function is the same as intf_DbgMsgImm, except that it prints its
330 * message immediately. It should only be called through the macro
332 *****************************************************************************/
334 void _intf_DbgMsgImm( char *psz_file, char *psz_function, int i_line,
335 char *psz_format, ...)
339 va_start( ap, psz_format );
340 QueueDbgMsg( p_main->p_msg, psz_file, psz_function, i_line,
347 /*****************************************************************************
348 * intf_FlushMsg (ok ?)
349 *****************************************************************************
350 * Print all messages remaining in queue: get lock and call FlushLockedMsg.
351 * This function does nothing if the message queue isn't used.
352 * This function is only implemented if message queue is used. If not, it is
354 *****************************************************************************/
355 #ifdef INTF_MSG_QUEUE
356 void intf_FlushMsg( void )
358 vlc_mutex_lock( &p_main->p_msg->lock ); /* get lock */
359 FlushLockedMsg( p_main->p_msg ); /* flush messages */
360 vlc_mutex_unlock( &p_main->p_msg->lock ); /* give lock back */
364 /* following functions are local */
366 /*****************************************************************************
367 * QueueMsg: add a message to a queue
368 *****************************************************************************
369 * This function provide basic functionnalities to other intf_*Msg functions.
370 * It add a message to a queue (after having printed all stored messages if it
371 * is full. If the message can't be converted to string in memory, it exit the
372 * program. If the queue is not used, it prints the message immediately.
373 *****************************************************************************/
374 static void QueueMsg( intf_msg_t *p_msg, int i_type, char *psz_format, va_list ap )
376 char * psz_str; /* formatted message string */
377 intf_msg_item_t * p_msg_item; /* pointer to message */
379 #ifndef INTF_MSG_QUEUE /*................................... instant mode ...*/
380 intf_msg_item_t msg_item; /* message */
381 p_msg_item = &msg_item;
382 #endif /*....................................................................*/
385 * Convert message to string
388 psz_str = (char*) malloc( strlen(psz_format) + INTF_MAX_MSG_SIZE );
389 vsprintf( psz_str, psz_format, ap );
391 vasprintf( &psz_str, psz_format, ap );
393 if( psz_str == NULL )
395 fprintf(stderr, "warning: can't store following message (%s): ",
397 vfprintf(stderr, psz_format, ap );
401 #ifdef INTF_MSG_QUEUE /*...................................... queue mode ...*/
402 vlc_mutex_lock( &p_msg->lock ); /* get lock */
403 if( p_msg->i_count == INTF_MSG_QSIZE ) /* flush queue if needed */
405 #ifdef DEBUG /* in debug mode, queue overflow causes a warning */
406 fprintf(stderr, "warning: message queue overflow\n" );
408 FlushLockedMsg( p_msg );
410 p_msg_item = p_msg->msg + p_msg->i_count++; /* select message */
411 #endif /*.............................................. end of queue mode ...*/
414 * Fill message information fields
416 p_msg_item->i_type = i_type;
417 p_msg_item->psz_msg = psz_str;
419 #ifdef INTF_MSG_QUEUE /*......................................... queue mode */
420 vlc_mutex_unlock( &p_msg->lock ); /* give lock back */
421 #else /*....................................................... instant mode */
422 PrintMsg( p_msg_item ); /* print message */
423 free( psz_str ); /* free message data */
424 #endif /*....................................................................*/
427 /*****************************************************************************
428 * QueueDbgMsg: add a message to a queue with debugging informations
429 *****************************************************************************
430 * This function is the same as QueueMsg, except that it is only defined when
431 * DEBUG is define, and require additionnal debugging informations.
432 *****************************************************************************/
434 static void QueueDbgMsg(intf_msg_t *p_msg, char *psz_file, char *psz_function,
435 int i_line, char *psz_format, va_list ap)
437 char * psz_str; /* formatted message string */
438 intf_msg_item_t * p_msg_item; /* pointer to message */
440 #ifndef INTF_MSG_QUEUE /*................................... instant mode ...*/
441 intf_msg_item_t msg_item; /* message */
442 p_msg_item = &msg_item;
443 #endif /*....................................................................*/
446 * Convert message to string
449 psz_str = (char*) malloc( INTF_MAX_MSG_SIZE );
450 vsprintf( psz_str, psz_format, ap );
452 vasprintf( &psz_str, psz_format, ap );
454 if( psz_str == NULL )
456 fprintf(stderr, "warning: can't store following message (%s): ",
458 fprintf(stderr, INTF_MSG_DBG_FORMAT, psz_file, psz_function, i_line );
459 vfprintf(stderr, psz_format, ap );
463 #ifdef INTF_MSG_QUEUE /*...................................... queue mode ...*/
464 vlc_mutex_lock( &p_msg->lock ); /* get lock */
465 if( p_msg->i_count == INTF_MSG_QSIZE ) /* flush queue if needed */
467 #ifdef DEBUG /* in debug mode, queue overflow causes a warning */
468 fprintf(stderr, "warning: message queue overflow\n" );
470 FlushLockedMsg( p_msg );
472 p_msg_item = p_msg->msg + p_msg->i_count++; /* select message */
473 #endif /*.............................................. end of queue mode ...*/
476 * Fill message information fields
478 p_msg_item->i_type = INTF_MSG_DBG;
479 p_msg_item->psz_msg = psz_str;
480 p_msg_item->psz_file = psz_file;
481 p_msg_item->psz_function = psz_function;
482 p_msg_item->i_line = i_line;
483 p_msg_item->date = mdate();
485 #ifdef INTF_MSG_QUEUE /*......................................... queue mode */
486 vlc_mutex_unlock( &p_msg->lock ); /* give lock back */
487 #else /*....................................................... instant mode */
488 PrintMsg( p_msg_item ); /* print message */
489 free( psz_str ); /* free message data */
490 #endif /*....................................................................*/
494 /*****************************************************************************
495 * FlushLockedMsg (ok ?)
496 *****************************************************************************
497 * Print all messages remaining in queue. MESSAGE QUEUE MUST BE LOCKED, since
498 * this function does not check the lock. This function is only defined if
499 * INTF_MSG_QUEUE is defined.
500 *****************************************************************************/
501 #ifdef INTF_MSG_QUEUE
502 static void FlushLockedMsg ( intf_msg_t *p_msg )
506 for( i_index = 0; i_index < p_msg->i_count; i_index++ )
508 /* Print message and free message data */
509 PrintMsg( &p_msg->msg[i_index] );
510 free( p_msg->msg[i_index].psz_msg );
517 /*****************************************************************************
518 * PrintMsg: print a message (ok ?)
519 *****************************************************************************
520 * Print a single message. The message data is not freed. This function exists
521 * in two version. The DEBUG version prints a date with each message, and is
522 * able to log messages (if DEBUG_LOG is defined).
523 * The normal one just prints messages to the screen.
524 *****************************************************************************/
527 static void PrintMsg( intf_msg_item_t *p_msg )
529 char psz_date[MSTRTIME_MAX_SIZE]; /* formatted time buffer */
530 char * psz_msg; /* message buffer */
532 /* Format message - the message is formatted here because in case the log
533 * file is used, it avoids another format string parsing */
534 switch( p_msg->i_type )
536 case INTF_MSG_STD: /* regular messages */
538 asprintf( &psz_msg, "%s", p_msg->psz_msg );
541 case INTF_MSG_WARN: /* Warning message */
542 asprintf( &psz_msg, "%s", p_msg->psz_msg );
545 case INTF_MSG_INTF: /* interface messages */
546 asprintf( &psz_msg, "%s", p_msg->psz_msg );
549 case INTF_MSG_DBG: /* debug messages */
550 mstrtime( psz_date, p_msg->date );
551 asprintf( &psz_msg, "(%s) " INTF_MSG_DBG_FORMAT "%s",
552 psz_date, p_msg->psz_file, p_msg->psz_function, p_msg->i_line,
557 /* Check if formatting function succeeded */
558 if( psz_msg == NULL )
560 fprintf( stderr, "error: can not format message (%s): %s\n",
561 strerror( errno ), p_msg->psz_msg );
568 switch( p_msg->i_type )
570 case INTF_MSG_STD: /* standard messages */
571 fprintf( stdout, psz_msg );
573 case INTF_MSG_ERR: /* error messages */
575 #ifndef DEBUG_LOG_ONLY
576 case INTF_MSG_DBG: /* debugging messages */
578 fprintf( stderr, psz_msg );
580 case INTF_MSG_INTF: /* interface messages */
581 intf_ConsolePrint( p_main->p_intf->p_console, psz_msg );
586 /* Append all messages to log file */
587 if( p_main->p_msg->p_log_file != NULL )
589 fwrite( psz_msg, strlen( psz_msg ), 1, p_main->p_msg->p_log_file );
593 /* Free formatted message */
599 static void PrintMsg( intf_msg_item_t *p_msg )
602 * Print messages on screen
604 switch( p_msg->i_type )
606 case INTF_MSG_STD: /* standard messages */
607 case INTF_MSG_DBG: /* debug messages */
608 fprintf( stdout, p_msg->psz_msg );
610 case INTF_MSG_ERR: /* error messages */
612 fprintf( stderr, p_msg->psz_msg ); /* warning message */
614 case INTF_MSG_INTF: /* interface messages */
615 intf_ConsolePrint( p_main->p_intf->p_console, p_msg->psz_msg );