Add/Change tooltype

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Wed, 2013-08-07 00:12
#1
jabirulo
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Joined: 2013-05-30 00:53
Add/Change tooltype

Hi just created this code to ADD/CHANGE one tooltype (IMAGEPATH) and want to share/show if it's well done or it's so "bad coded (TM)" or maybe if there is an easier way to do it:

  1. void SaveNewIMAGEPATH(void)
  2. {
  3.  STRPTR *oldttp = NULL;
  4.  int i;
  5.  char newttp[128]="IMAGEPATH=";
  6.  struct DiskObject *micon = NULL;
  7.  
  8.  if(WBenchMsg) // get tool(Mixer) name, maybe user changed 'Mixer' to 'XXX'
  9.   snprintf(textbuf, sizeof(textbuf), "PROGDIR:%s",WBenchMsg->sm_ArgList->wa_Name);
  10.  else GetCliProgramName( textbuf, sizeof(textbuf) );
  11.  
  12.  micon = GetDiskObject(textbuf);
  13.  if(micon)
  14.  {
  15.   strcat(newttp, ARG("IMAGEPATH") );
  16. #ifdef _DEBUG_
  17. Printf("'%s'\n",newttp);
  18. #endif
  19.   for(i = 0; micon->do_ToolTypes[i] != NULL; i++) // parse tootlypes
  20.   {
  21.    if( !strncmp(micon->do_ToolTypes[i], "IMAGEPATH=", 10) ) // is it IMAGEPATH ?
  22.    {
  23. #ifdef _DEBUG_
  24. Printf("1'%s'\n",micon->do_ToolTypes[i]);
  25. #endif
  26.     if( stricmp(micon->do_ToolTypes[i], newttp) || strlen(micon->do_ToolTypes[i]) != strlen(newttp) )
  27.     {// skin changed -> modify IMAGEPATH tooltype and END
  28.      oldttp = micon->do_ToolTypes;
  29.      micon->do_ToolTypes[i] = newttp;
  30.      PutDiskObject(textbuf,micon);
  31.      micon->do_ToolTypes = oldttp;
  32. #ifdef _DEBUG_
  33. Printf("(%s) modified.\n",newttp);
  34. #endif
  35.     }
  36.     break;
  37.  
  38.    }
  39.  
  40.   }
  41.  
  42.   if( !micon->do_ToolTypes[i] && stricmp("PROGDIR:Images", ARG("IMAGEPATH")) )
  43.   {// no IMAGEPATH tooltype AND skin changed -> create IMAGEPATH tooltype and END
  44. #ifdef _DEBUG_
  45. Printf("2IMAGEPATH='%s' i=%ld\n",ARG("IMAGEPATH"),i );
  46. #endif
  47.    oldttp = micon->do_ToolTypes;
  48.    micon->do_ToolTypes[i] = newttp;
  49.    micon->do_ToolTypes[i+1] = NULL;
  50.    PutDiskObject(textbuf,micon);
  51.    micon->do_ToolTypes = oldttp;
  52. #ifdef _DEBUG_
  53. Printf("(%s) created.\n",newttp);
  54. #endif
  55.   }
  56.  
  57.   FreeDiskObject(micon);
  58.  }
  59. #ifdef _DEBUG_
  60. Printf("END SaveNewIMAGEPATH()\n");
  61. #endif
  62. }

BTW 'char newttp[128]="IMAGEPATH=";'
can be changed to:
'char *newttp; .. newttp=AllocVecTags(128, AVT_ClearWithValue, 0, TAG_END); .. FreeVec(newttp)'
is it "better"/safer that last mode?

TIA

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Wed, 2013-08-07 16:10
thomas
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Last seen: 3 months 1 week ago
Joined: 2011-05-16 14:23
I don't think there is any

I don't think there is any reserved space behind the do_ToolTypes array for adding new tooltypes. Therefore you must not write to do_ToolTypes[i+1]. You rather have to allocate a complete new array with additional space, copy the existing array, add your new tooltype and write the pointer of the new array into the do_ToolTypes field.

something like this:

  1. oldtts = micon->do_ToolTypes;
  2. newtts = malloc((i+2) * sizeof(STRPTR));
  3. memcpy (newtts,oldtts,i * sizeof(STRPTR);
  4. newtts[i] = newttp;
  5. newtts[i+1] = NULL;
  6. micon->do_ToolTypes = newtts;
  7. PutDiskObject (textbuf,micon);
  8. micon->do_ToolTypes = oldtts;
  9. free (newtts);
  10. FreeDiskObject (micon);
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Thu, 2013-08-08 01:46
(Reply to #2)
jabirulo
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Last seen: 3 weeks 1 day ago
Joined: 2013-05-30 00:53
You're right it worked

You're right it worked sometimes, crashed some others.
Changed with your code (note to myself: never try to change/add directly structures/objects already read/allocated) :-) and working always fine.

AOS4.1/SAM460ex/PPC460EX-1155MHZ/2048MB/RadeonHD6570/SSD120GB/DVDRW :-P

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Thu, 2013-08-08 09:46
gazelle
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Last seen: 1 year 9 months ago
Joined: 2011-04-13 12:52
The lines 28 - 31 also don't

The lines 28 - 31 also don't look correct. You save/restore the pointer to the string array but override only one of the string pointers, so you save/restore the wrong one.

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