References ▼
#include "ltbar.h"
L_LTBAR_API L_INT L_BarCodeGetDuplicated(pBarCodeDataItem)
Returns the index of the first barcode that is a duplicate of the specified barcode.
Pointer to the BARCODEDATA structure that contains barcode information.
| Value | Meaning |
|---|---|
| >= 0 | The index of the duplicated barcode. |
| < 0 | An error occurred. Refer to Return Codes. |
LEADTOOLS provides a number of functions to let you work with duplicated barcodes. They let you:
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.
Although no function is included to tell you the number of different sets of barcodes that are duplicated, you can easily program this by using the following code:
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){j = pBarCodeData[j].nIndexDuplicate;pbVisited[j] = TRUE;}}free(pbVisited);
After this code is executed, nCount will contain the number of different sets of barcodes.
Required DLLs and Libraries
Win32, x64, Linux.
For complete sample code refer to MFCBar32 demo.
L_INT BarCodeGetDuplicatedExample(HWND hWnd, pBARCODEDATA pBarCodeData){L_INT nDupIndex=0;L_TCHAR szBuffer[256];if (!pBarCodeData)return FAILURE;ZeroMemory(szBuffer, sizeof(szBuffer));if (L_BarCodeIsDuplicated(&(pBarCodeData)[0])){nDupIndex = L_BarCodeGetDuplicated(&(pBarCodeData)[0]);if (nDupIndex >= 0){// Print the first duplicated barcode datawsprintf(szBuffer, TEXT("Data is %hs\nType %d\nUnits %d\nPosX %d\nPosY %d\nWidth %d\nHeight %d\n\n"),(pBarCodeData)[nDupIndex].pszBarCodeData, (pBarCodeData)[nDupIndex].ulType, (pBarCodeData)[nDupIndex].nUnits,(pBarCodeData)[nDupIndex].rcBarLocation.left,(pBarCodeData)[nDupIndex].rcBarLocation.top,abs((pBarCodeData)[nDupIndex].rcBarLocation.right - (pBarCodeData)[nDupIndex].rcBarLocation.left),abs((pBarCodeData)[nDupIndex].rcBarLocation.bottom - (pBarCodeData)[nDupIndex].rcBarLocation.top));MessageBox(hWnd, szBuffer, TEXT("BarCode Info."), MB_OK);// find the next (second) duplicated barcode datanDupIndex = L_BarCodeGetNextDuplicated(pBarCodeData, nDupIndex);if (nDupIndex >= 0){wsprintf(szBuffer, TEXT("Data is %hs\nType %d\nUnits %d\nPosX %d\nPosY %d\nWidth %d\nHeight %d\n\n"),(pBarCodeData)[nDupIndex].pszBarCodeData, (pBarCodeData)[nDupIndex].ulType, (pBarCodeData)[nDupIndex].nUnits,(pBarCodeData)[nDupIndex].rcBarLocation.left,(pBarCodeData)[nDupIndex].rcBarLocation.top,abs((pBarCodeData)[nDupIndex].rcBarLocation.right - (pBarCodeData)[nDupIndex].rcBarLocation.left),abs((pBarCodeData)[nDupIndex].rcBarLocation.bottom - (pBarCodeData)[nDupIndex].rcBarLocation.top));MessageBox(hWnd, szBuffer, TEXT("BarCode Info."), MB_OK);return SUCCESS;}}if (nDupIndex < 0){wsprintf(szBuffer, TEXT("An error occurred \nError Code = %d\n"), nDupIndex);MessageBox(hWnd, szBuffer, TEXT("Notice!"), MB_OK);return nDupIndex;}}else{wsprintf(szBuffer, TEXT("This Barcode is not duplicated ..."));MessageBox(hWnd, szBuffer, TEXT("Notice!"), MB_OK);}return SUCCESS;}