mirror of
https://github.com/postgres/postgres.git
synced 2025-10-29 22:49:41 +03:00
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
|
|
* ISMN.h
|
|
* PostgreSQL type definitions for ISNs (ISBN, ISMN, ISSN, EAN13, UPC)
|
|
*
|
|
* Information recompiled by Kronuz on November 12, 2004
|
|
* http://www.ismn-international.org
|
|
*
|
|
* IDENTIFICATION
|
|
* contrib/isn/ISMN.h
|
|
*
|
|
* M-3452-4680-5 <=> (0)-3452-4680-5 <=> 0345246805 <=> 9790345246805 <=> 979-0-3452-4680-5
|
|
*
|
|
* (M counts as 3)
|
|
* ISMN M 3 4 5 2 4 6 8 0
|
|
* Weight 3 1 3 1 3 1 3 1 3
|
|
* Product 9 + 3 + 12 + 5 + 6 + 4 + 18 + 8 + 0 = 65
|
|
* 65 / 10 = 6 remainder 5
|
|
* Check digit 10 - 5 = 5
|
|
* => M-3452-4680-5
|
|
*
|
|
* ISMN 9 7 9 0 3 4 5 2 4 6 8 0
|
|
* Weight 1 3 1 3 1 3 1 3 1 3 1 3
|
|
* Product 9 + 21 + 9 + 0 + 3 + 12 + 5 + 6 + 4 + 18 + 8 + 0 = 95
|
|
* 95 / 10 = 9 remainder 5
|
|
* Check digit 10 - 5 = 5
|
|
* => 979-0-3452-4680-5
|
|
*
|
|
* Since mod10(9*1 + 7*3 + 9*1 + 0*3) = mod10(M*3) = mod10(3*3) = 9; the check digit remains the same.
|
|
*
|
|
*/
|
|
|
|
/* where the digit set begins, and how many of them are in the table */
|
|
const unsigned ISMN_index[10][2] = {
|
|
{0, 5},
|
|
{5, 0},
|
|
{5, 0},
|
|
{5, 0},
|
|
{5, 0},
|
|
{5, 0},
|
|
{5, 0},
|
|
{5, 0},
|
|
{5, 0},
|
|
{5, 0},
|
|
};
|
|
const char *ISMN_range[][2] = {
|
|
{"0-000", "0-099"},
|
|
{"0-1000", "0-3999"},
|
|
{"0-40000", "0-69999"},
|
|
{"0-700000", "0-899999"},
|
|
{"0-9000000", "0-9999999"},
|
|
{NULL, NULL}
|
|
};
|