libopenjpeg/event.c

   1 /*
   2  * Copyright (c) 2005, Herv� Drolon, FreeImage Team
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  15  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  18  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  19  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  20  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  21  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  22  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  23  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  24  * POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "opj_includes.h"
  28
  29 // ==========================================================
  30 //   Utility functions
  31 // ==========================================================
  32
  33 #ifndef WIN32
  34 static char*
  35 i2a(unsigned i, char *a, unsigned r) {
  36         if (i/r > 0) a = i2a(i/r,a,r);
  37         *a = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"[i%r];
  38         return a+1;
  39 }
  40
  41 /**
  42  Transforms integer i into an ascii string and stores the result in a;
  43  string is encoded in the base indicated by r.
  44  @param i Number to be converted
  45  @param a String result
  46  @param r Base of value; must be in the range 2 - 36
  47  @return Returns a
  48 */
  49 static char *
  50 _itoa(int i, char *a, int r) {
  51         r = ((r < 2) || (r > 36)) ? 10 : r;
  52         if(i < 0) {
  53                 *a = '-';
  54                 *i2a(-i, a+1, r) = 0;
  55         }
  56         else *i2a(i, a, r) = 0;
  57         return a;
  58 }
  59
  60 #endif // !WIN32
  61
  62 /* ----------------------------------------------------------------------- */
  63
  64 opj_event_mgr_t* opj_set_event_mgr(opj_common_ptr cinfo, opj_event_mgr_t *event_mgr, void *context) {
  65         if(cinfo) {
  66                 opj_event_mgr_t *previous = cinfo->event_mgr;
  67                 cinfo->event_mgr = event_mgr;
  68                 cinfo->client_data = context;
  69                 return previous;
  70         }
  71
  72         return NULL;
  73 }
  74
  75 bool opj_event_msg(opj_common_ptr cinfo, int event_type, const char *fmt, ...) {
  76 #define MSG_SIZE 512 /* 512 bytes should be more than enough for a short message */
  77         opj_msg_callback msg_handler = NULL;
  78
  79         opj_event_mgr_t *event_mgr = cinfo->event_mgr;
  80         if(event_mgr != NULL) {
  81                 switch(event_type) {
  82                         case EVT_ERROR:
  83                                 msg_handler = event_mgr->error_handler;
  84                                 break;
  85                         case EVT_WARNING:
  86                                 msg_handler = event_mgr->warning_handler;
  87                                 break;
  88                         case EVT_INFO:
  89                                 msg_handler = event_mgr->info_handler;
  90                                 break;
  91                         default:
  92                                 break;
  93                 }
  94                 if(msg_handler == NULL) {
  95                         return false;
  96                 }
  97         } else {
  98                 return false;
  99         }
 100
 101         if ((fmt != NULL) && (event_mgr != NULL)) {
 102                 va_list arg;
 103                 int str_length, i, j;
 104                 char message[MSG_SIZE];
 105                 memset(message, 0, MSG_SIZE);
 106                 /* initialize the optional parameter list */
 107                 va_start(arg, fmt);
 108                 /* check the length of the format string */
 109                 str_length = (strlen(fmt) > MSG_SIZE) ? MSG_SIZE : strlen(fmt);
 110                 /* parse the format string and put the result in 'message' */
 111                 for (i = 0, j = 0; i < str_length; ++i) {
 112                         if (fmt[i] == '%') {
 113                                 if (i + 1 < str_length) {
 114                                         switch(tolower(fmt[i + 1])) {
 115                                                 case '%' :
 116                                                         message[j++] = '%';
 117                                                         break;
 118                                                 case 'o' : /* octal numbers */
 119                                                 {
 120                                                         char tmp[16];
 121                                                         _itoa(va_arg(arg, int), tmp, 8);
 122                                                         strcat(message, tmp);
 123                                                         j += strlen(tmp);
 124                                                         ++i;
 125                                                         break;
 126                                                 }
 127                                                 case 'i' : /* decimal numbers */
 128                                                 case 'd' :
 129                                                 {
 130                                                         char tmp[16];
 131                                                         _itoa(va_arg(arg, int), tmp, 10);
 132                                                         strcat(message, tmp);
 133                                                         j += strlen(tmp);
 134                                                         ++i;
 135                                                         break;
 136                                                 }
 137                                                 case 'x' : /* hexadecimal numbers */
 138                                                 {
 139                                                         char tmp[16];
 140                                                         _itoa(va_arg(arg, int), tmp, 16);
 141                                                         strcat(message, tmp);
 142                                                         j += strlen(tmp);
 143                                                         ++i;
 144                                                         break;
 145                                                 }
 146                                                 case 's' : /* strings */
 147                                                 {
 148                                                         char *tmp = va_arg(arg, char*);
 149                                                         strcat(message, tmp);
 150                                                         j += strlen(tmp);
 151                                                         ++i;
 152                                                         break;
 153                                                 }
 154                                                 case 'f' :      /* floats */
 155                                                 {
 156                                                         char tmp[16];
 157                                                         double value = va_arg(arg, double);
 158                                                         sprintf(tmp, "%f", value);
 159                                                         strcat(message, tmp);
 160                                                         j += strlen(tmp);
 161                                                         ++i;
 162                                                         break;
 163                                                 }
 164                                         };
 165                                 } else {
 166                                         message[j++] = fmt[i];
 167                                 }
 168                         } else {
 169                                 message[j++] = fmt[i];
 170                         };
 171                 }
 172                 /* deinitialize the optional parameter list */
 173                 va_end(arg);
 174
 175                 /* output the message to the user program */
 176                 msg_handler(message, cinfo->client_data);
 177         }
 178
 179         return true;
 180 }
 181