L_BarCodeIsDuplicated

Summary

Returns a value that indicates whether the specified barcode is duplicated or not.

Syntax

L_LTBAR_API L_BOOL L_BarCodeIsDuplicated(pBarCodeDataItem)

Parameters

pBARCODEDATA pBarCodeDataItem

Pointer to the BARCODEDATA structure that contains the barcode information.

Returns

Comments

This function determines if a barcode is duplicated in another location in the bitmap.

LEADTOOLS provides a number of functions to let you work with duplicated barcodes. They let you:

• Find the number of duplicates of a specific barcode.
• Determine whether a specific barcode is duplicated.
• Get the index of the first duplicated barcode.
• Get the index of a subsequent barcode.

To determine whether a barcode is duplicated, use the L_BarCodeIsDuplicated function. If a barcode is duplicated, L_BarCodeGetDuplicated will return the index of the first barcode in the array after the specified barcode, which is a duplicate of the specified barcode.

If you know the index of a barcode within an array, you can get the index of the first duplicate of the specified barcode using L_BarCodeGetFirstDuplicated. Use the L_BarCodeGetNextDuplicated to get the next instance of a duplicated barcode.

To find out how many sets of barcodes are duplicated, use the following:

int GetSetsCount(pBARCODEDATA pBarCodeData) 
{ 
   L_INT i, j, nCount; 
   L_BOOL * pbVisited = (L_BOOL *)malloc(pBarCodeData->nTotalCount*sizeof(L_BOOL)); 
   memset(pbVisited, 0, pBarCodeData->nTotalCount*sizeof(L_BOOL)); 
   nCount = 0; 
   for (i=0; i<pBarCodeData->nTotalCount; i++) 
   { 
      if(pbVisited[i]) 
         continue; 
      pbVisited[i] = TRUE; 
      nCount++; 
      j = i; 
      while(pBarCodeData[j].nIndexDuplicate != -1 && pBarCodeData[j].nIndexDuplicate != 255) 
      { 
         j = pBarCodeData[j].nIndexDuplicate; 
         pbVisited[j] = TRUE; 
      } 
   } 
   free(pbVisited); 
   return nCount; 
} 

For example, in an array of ten barcodes, the first, third, and fifth might be duplicates of each other, while the 4th, 8th and 9th are duplicates of a different barcode. After this code is executed, nCount will contain the number of different sets of barcodes.

To read in barcodes present in a bitmap, use the L_BarCodeRead or L_BarCodeReadExt function. Any item in the barcode array returned by L_BarCodeRead can be passed to L_BarCodeIsDuplicated.

Required DLLs and Libraries

• LTBAR
• For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64, Linux.

See Also

Functions

• L_BarCodeRead
• L_BarCodeReadExt
• L_BarCodeFree
• L_BarCodeGetDuplicated
• L_BarCodeGetNextDuplicated
• L_BarCodeVersionInfo
• L_BarCodeGetFirstDuplicated
• L_BarCodeWrite

Topics

• Programming with LEADTOOLS Barcode
• BarCode C API Function Groups

Example

For an example, refer to L_BarCodeGetDuplicated.