| 25 | |
| 26 | |
| 27 | BOOL IsValidCheckDigit(DWORD dw) |
| 28 | { |
| 29 | // validates check digit given 7-digit sequence + check-digit |
| 30 | |
| 31 | int iLastDigit = dw%10; |
| 32 | BOOL fIsvalid = TRUE; |
| 33 | DWORD dwSum = 0; |
| 34 | |
| 35 | |
| 36 | switch (dw%10) // last digit |
| 37 | { |
| 38 | case 0: |
| 39 | case 8: |
| 40 | case 9: |
| 41 | fIsvalid = FALSE; |
| 42 | break; |
| 43 | |
| 44 | default: |
| 45 | while (dw != 0) |
| 46 | { |
| 47 | dwSum += dw % 10; |
| 48 | dw /= 10; |
| 49 | } |
| 50 | fIsvalid = (0 == dwSum % 7); |
| 51 | } |
| 52 | return fIsvalid; |
| 53 | } |
| 54 | |
| 55 | |
| 56 | DWORD AddCheckDigit(DWORD dw) |
nothing calls this directly
no outgoing calls
no test coverage detected