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# # ## ### ##### ######## ############# ######################
## Validation of IBAN numbers.
#
# Reference:
# http://en.wikipedia.org/wiki/International_Bank_Account_Number
#
# # ## ### ##### ######## ############# ######################
# The code below implements the interface of a snit validation type,
# making it directly usable with snit's -type option in option
# specifications.
# # ## ### ##### ######## ############# ######################
## Requisites
package require Tcl 8.5
package require snit
package require valtype::common
# # ## ### ##### ######## ############# ######################
## Implementation
namespace eval ::valtype::iban {
namespace import ::valtype::common::*
}
snit::type ::valtype::iban {
#-------------------------------------------------------------------
# Type Methods
typevariable cclen -array {
AL 28 AD 24 AT 20 BH 22 BE 16 BA 20 BG 22 BR 29 CR 21 HR 21 CY 28 CZ 24 DK 18 FO 18 GL 18 DO 28 EE 20 FI 18
FR 27 GF 27 GP 27 MQ 27 RE 27 PF 27 TF 27 YT 27 NC 27 PM 27 WF 27 GE 22 DE 22 GI 23 GR 27 HU 28 SV 28
IS 26 IE 22 IL 23 IT 27 KZ 20 KW 30 LV 21 LB 28 LI 21 LT 20 LU 20 MK 19 MT 31 MR 27 MU 30 MC 27
ME 22 NL 18 NO 15 PL 28 PS 29 PT 25 RO 24 SM 27 SA 24 RS 22 SK 24 SI 19 ST 25 ES 24 SE 24 CH 21 TN 24 TR 26
AE 23 GB 22 AZ 28 MD 24 PK 24 VG 24 GT 28 QA 29 JO 30 TL 23 XK 20 UA 29 SC 31 LC 32 BY 28 IQ 23
}
typevariable charmap {
A 10 B 11 C 12 D 13 E 14 F 15 G 16 H 17 I 18 J 19 K 20 L 21 M 22
N 23 O 24 P 25 Q 26 R 27 S 28 T 29 U 30 V 31 W 32 X 33 Y 34 Z 35
}
typemethod cclen {cc} {
return $cclen($cc)
}
typemethod validate {value} {
set value [string toupper $value]
if {![regexp {^[A-Z]{2}[0-9A-Z]+$} $value]} {
badchar IBAN "IBAN number, expected country code followed by alphanumerics"
}
set country [string range $value 0 1]
if {![info exists cclen($country)]} {
badprefix IBAN "" "IBAN number, unknown country code"
}
if {[string length $value] != $cclen($country)} {
badlength IBAN $cclen($country) "IBAN number"
}
set number [string range $value 4 end][string range $value 0 3]
set number [string map $charmap $number]
set number [string trimleft $number 0]
if {($number % 97) != 1} {
badcheck IBAN "IBAN number"
}
return $value
}
#-------------------------------------------------------------------
# Constructor
# None needed; no options
#-------------------------------------------------------------------
# Public Methods
method validate {value} {
$type validate $value
}
}
# # ## ### ##### ######## ############# ######################
## Ready
package provide valtype::iban 1.7
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