summaryrefslogtreecommitdiff
path: root/hugin.c
blob: 42369d8af57457abf85bb27247d835a7b2b7cb74 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
 *            hugin.c
 *
 *  Thu Nov  1 13:38:47 CET 2012
 *  Copyright 2012 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of Hugin.
 *
 *  Hugin is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Hugin 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 Hugin; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "hugin.h"

#ifndef DISABLE_HUGIN

#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#ifdef WITH_HUG_MUTEX
# ifdef WIN32
#  include <windows.h>
typedef HANDLE mutex_t;

// see http://stackoverflow.com/questions/558223/va-copy-porting-to-visual-c
//#define va_copy(dest, src) (dest = src)

# else
#  include <pthread.h>
typedef pthread_mutex_t mutex_t;
# endif

void mutex_init(mutex_t *mutex)
{
#ifdef WIN32
  *mutex = CreateMutex(NULL,  // default security attributes
                       FALSE, // initially not owned
                       NULL); // unnamed mutex
#else
  pthread_mutex_init (mutex, NULL);
#endif
}

void mutex_close(mutex_t *mutex)
{
#ifdef WIN32
  CloseHandle(*mutex);
#else
  pthread_mutex_destroy(mutex);
#endif
}

void mutex_lock(mutex_t *mutex)
{
#ifdef WIN32
  WaitForSingleObject(*mutex, // handle to mutex
                      INFINITE);  // no time-out interval
#else
  pthread_mutex_lock(mutex);
#endif
}

void mutex_unlock(mutex_t *mutex)
{
#ifdef WIN32
  ReleaseMutex(*mutex);
#else
  pthread_mutex_unlock(mutex);
#endif
}

#ifdef WIN32
#define MUTEX_INIT_VALUE 0
#else
#define MUTEX_INIT_VALUE {}
#endif

#else/*WITH_HUG_MUTEX*/

#define MUTEX_INIT_VALUE 0
typedef int mutex_t;
void mutex_init(mutex_t *mutex) { (void)mutex; }
void mutex_close(mutex_t *mutex) { (void)mutex; }
void mutex_lock(mutex_t *mutex) { (void)mutex; }
void mutex_unlock(mutex_t *mutex) { (void)mutex; }

#endif/*WITH_HUG_MUTEX*/

mutex_t localtime_mutex;

#ifdef WITH_HUG_FILTER
#include "hugin_filter.h"
#endif

#ifdef WITH_HUG_SYSLOG
#include "hugin_syslog.h"
#endif

struct hug_config_t {
  unsigned int flags;
  int fd;
  int file_fd;
  int stdout_no_date;
  mutex_t mutex;
  char *filename;
#ifdef WITH_HUG_SYSLOG
  const char* syslog_host;
  int syslog_port;
#endif
} hug_config = {
  HUG_FLAG_DEFAULT, // flags
  -1, // fd
  -1, // file_fd
  0, //stdout_no_date
  //#ifdef WITH_HUG_MUTEX
  MUTEX_INIT_VALUE, // mutex;
  //#endif
  NULL, // filename
#ifdef WITH_HUG_SYSLOG
  NULL, // syslog_host;
  541, // syslog_port;
#endif
  /* // This doesn't work in C++
  .flags = HUG_FLAG_DEFAULT,
  .fd = -1,
  .file_fd = -1,
  .stdout_no_date = 0
  */
}; 

struct tm *hug_localtime(const time_t *timep, struct tm *result)
{
  struct tm *res = NULL;
  mutex_lock(&localtime_mutex);

	if(timep && result) {
    memcpy(result,localtime(timep),sizeof(*result)); 
    res = result;
  }

  mutex_unlock(&localtime_mutex);
  return res;
}


static void hug_mutex_init()
{
#ifdef WITH_HUG_MUTEX
  if(hug_config.flags & HUG_FLAG_USE_MUTEX) {
    mutex_init(&hug_config.mutex);
  }

  mutex_init(&localtime_mutex);
#endif
}

static void hug_mutex_lock()
{
#ifdef WITH_HUG_MUTEX
  if(hug_config.flags & HUG_FLAG_USE_MUTEX) {
    mutex_lock(&hug_config.mutex);
  }
#endif
}

static void hug_mutex_unlock()
{
#ifdef WITH_HUG_MUTEX
  if(hug_config.flags & HUG_FLAG_USE_MUTEX) {
    mutex_unlock(&hug_config.mutex);
  }
#endif
}

static void hug_mutex_close()
{
#ifdef WITH_HUG_MUTEX
  if(hug_config.flags & HUG_FLAG_USE_MUTEX) {
    // Make sure we don't destroy the mutex while another thread is using it.
    hug_mutex_lock();
    hug_mutex_unlock();
    mutex_close(&hug_config.mutex);
  }
  
  mutex_close(&localtime_mutex);
#endif
}

hug_status_t hug_init(unsigned int flags, ...)
{
  hug_status_t status = HUG_STATUS_OK;

  hug_config.flags = flags;

  int end = 0;

  va_list vl;
  va_start(vl, flags);
  while(!end) {
    int option = va_arg(vl, int);
    switch(option) {
    case HUG_OPTION_END:
      end = 1;
      break;
    case HUG_OPTION_FD:
      hug_config.fd = va_arg(vl, int);
      break;
    case HUG_OPTION_STDOUT_NO_DATE:
      hug_config.stdout_no_date = va_arg(vl, int);
      break;
    case HUG_OPTION_FILENAME:
    {
      const char *filename = (const char*) va_arg(vl, char*);
      if(!filename) break;

      if(hug_config.flags & HUG_FLAG_OUTPUT_TO_FILE) {
        hug_config.filename = strdup(filename);
        hug_config.file_fd = open(hug_config.filename,
                                  O_CREAT | O_APPEND | O_RDWR, 0777);
        if(hug_config.file_fd == -1) {
          fprintf(stderr, "Could not open logfile for writing: %s\n",
                  hug_config.filename);
          return HUG_STATUS_ERROR;
        }
      }
    }
      break;
#ifdef WITH_HUG_SYSLOG
    case HUG_OPTION_SYSLOG_PORT:
      hug_config.syslog_port = va_arg(vl, int);
      break;
    case HUG_OPTION_SYSLOG_HOST:
      hug_config.syslog_host = (const char*)va_arg(vl, char*);
      break;
#endif
#ifdef WITH_HUG_FILTER
    case HUG_OPTION_FILTER:
      hug_filter_parse((const char*)va_arg(vl, char*));
      break;
#endif
    default:
      status = HUG_STATUS_UNKNOWN_OPTION;
      printf("option: %x\n", option);
      goto err;
    }
  }

  hug_mutex_init();

#ifdef WITH_HUG_SYSLOG
  if(hug_config.flags & HUG_FLAG_OUTPUT_TO_SYSLOG) {
    hug_syslog_init(hug_config.syslog_host, hug_config.syslog_port);
  }
#endif

 err:
  va_end(vl);

  return status;
}

void hug_close()
{
  if(hug_config.flags & HUG_FLAG_OUTPUT_TO_FILE) {
    if(hug_config.file_fd != -1) close(hug_config.file_fd);
    if(hug_config.filename) free(hug_config.filename);
  }

#ifdef WITH_HUG_SYSLOG
  hug_syslog_close();
#endif

  hug_mutex_close();
}

hug_status_t hugin_reopen_log()
{
  if((hug_config.flags & HUG_FLAG_OUTPUT_TO_FILE) == 0) return HUG_STATUS_OK;

  close(hug_config.file_fd);
  hug_config.file_fd = open(hug_config.filename,
                            O_CREAT | O_APPEND | O_RDWR, 0777);

  if(hug_config.file_fd == -1) {
    fprintf(stderr, "Could not re-open logfile for writing: %s\n",
            hug_config.filename);
    return HUG_STATUS_ERROR;
  }

  return HUG_STATUS_OK;
}

/*
static unsigned int gettid()
{
  return (unsigned int)pthread_self();
}
*/

static int hug_create_header(char *hdr, size_t size)
{
  time_t rawtime = time(NULL);
  struct tm t;
  hug_localtime(&rawtime, &t);

  return snprintf(hdr, size,
                  "%d-%02d-%02d %02d:%02d:%02d",
                  t.tm_year + 1900,
                  t.tm_mon + 1,
                  t.tm_mday,
                  t.tm_hour,
                  t.tm_min,
                  t.tm_sec);
}

static int hug_output_fd(int fd, const char *msg, int withdate)
{
  int s;

  if(fd == -1) return 1;

  if(withdate) {
    char hdr[32];
    hug_create_header(hdr, sizeof(hdr));
    
    s = write(fd, hdr, strlen(hdr));
    s = write(fd, " ", 1);
  }

  s = write(fd, msg, strlen(msg));
  if(msg[strlen(msg) - 1] != '\n') {
    s = write(fd, "\n", 1);
  }

  (void)s;

  return 0;
}

// These functions returns how big a buffer is needed to "render" the arg list.
static int vscprintf(const char *fmt, va_list va)
{
#ifdef WIN32
  return _vscprintf(fmt, va);
#else
  return vsnprintf(NULL, 0, fmt, va);
#endif
}

static int scprintf(const char *fmt, ...)
{
  int size;
  va_list va;
  va_start(va, fmt);
  size = vscprintf(fmt, va);
  va_end(va);

  return size;
}

#define HDR_ARGS debug_class_str[(unsigned)cl], ch, func, line

int __debug(const char *func, const int line,
            const enum __debug_class cl,
            const char *ch, const char *fmt, ...)
{
  int result = 0;
  int sz;
  char *buf = NULL;
  int hdr_bufsz = 0;
  int msg_bufsz = 0;
  const char hdr_fmt[] = "%s:%s:%s:%d ";

  // NOTE: This must be identical to the debug_class_str in debug_filter.c
  const char * const debug_class_str[] =
    { "fixme", "err", "warn", "info", "debug" };

  hug_mutex_lock();

#ifdef WITH_HUG_FILTER
  if(!hug_filter_enabled(cl, ch)) goto done;
#endif

  //
  // Generate message
  //
  {
    va_list va;
    va_start(va, fmt);
    hdr_bufsz = scprintf(hdr_fmt, HDR_ARGS);
    msg_bufsz = vscprintf(fmt, va);
    if(hdr_bufsz < 0 || msg_bufsz < 0) return 1; // Bad format?
    va_end(va);
  }

  buf = (char*)malloc(hdr_bufsz + msg_bufsz + 1);
  if(!buf) return 1; // Out of memory

  sz = sprintf(buf, hdr_fmt, HDR_ARGS);
  if(sz < 0) return 1; // Unknown error

  {
    va_list va;
    va_start(va, fmt);
    sz = vsprintf(buf + sz, fmt, va);
    if(sz < 0) return 1; // Unknown error
    va_end(va);
  }

  //
  // Send message to output
  //

  if(hug_config.flags & HUG_FLAG_OUTPUT_TO_STDOUT) {
    hug_output_fd(STDOUT_FILENO, buf, hug_config.stdout_no_date == 0);
  }

  if(hug_config.flags & HUG_FLAG_OUTPUT_TO_STDERR) {
    hug_output_fd(STDERR_FILENO, buf, 1);
  }

  if(hug_config.flags & HUG_FLAG_OUTPUT_TO_FD) {
    hug_output_fd(hug_config.fd, buf, 1);
  }

  if(hug_config.flags & HUG_FLAG_OUTPUT_TO_FILE) {
    hug_output_fd(hug_config.file_fd, buf, 1);
  }

#ifdef WITH_HUG_SYSLOG
  if(hug_config.flags & HUG_FLAG_OUTPUT_TO_SYSLOG) {
    hug_syslog_output(buf);
  }
#endif

#ifdef WITH_HUG_FILTER
done:
#endif
  hug_mutex_unlock();

  if(buf) free(buf);

  return result;
}

#endif/*DISABLE_HUGIN*/