fb16dfecae
Commit b7f05445c0 has added WWW entries to port Makefiles based on
WWW: lines in pkg-descr files.
This commit removes the WWW: lines of moved-over URLs from these
pkg-descr files.
Approved by: portmgr (tcberner)
15 lines
630 B
Plaintext
15 lines
630 B
Plaintext
These subroutines tell you whether a credit card number is
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self-consistent -- whether the last digit of the number is a valid
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checksum for the preceding digits.
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The validate() subroutine returns 1 if the card number provided passes
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the checksum test, and 0 otherwise.
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The cardtype() subroutine returns a string containing the type of card:
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"MasterCard", "VISA", and so on. My list is not complete; I welcome
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additions.
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The generate_last_digit() subroutine computes and returns the last digit
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of the card given the preceding digits. With a 16-digit card, you
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provide the first 15 digits; the subroutine returns the sixteenth.
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