Module:Check isxn: Difference between revisions
Jump to navigation
Jump to search
Content deleted Content added
X; |
fix return value |
||
| Line 52: | Line 52: | ||
local function check_isbn( isbn_str, error_string ) |
local function check_isbn( isbn_str, error_string ) |
||
if nil ~= isbn_str:match("[^%s-0-9X]") then |
if nil ~= isbn_str:match("[^%s-0-9X]") then -- fail if isbn_str contains anything but digits, hyphens, or the uppercase X |
||
return error_string; |
|||
end |
|||
isbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" ); -- remove hyphens and spaces |
isbn_str = isbn_str:gsub( "-", "" ):gsub( " ", "" ); -- remove hyphens and spaces |
||
local len = isbn_str:len(); |
local len = isbn_str:len(); |
||
| Line 61: | Line 63: | ||
if len == 10 then |
if len == 10 then |
||
if isbn_str:match( "^%d*X?$" ) == nil then |
if isbn_str:match( "^%d*X?$" ) == nil then |
||
return error_string; |
|||
end |
|||
return is_valid_isxn(isbn_str, 10) and '' or error_string; |
return is_valid_isxn(isbn_str, 10) and '' or error_string; |
||
else |
else |
||
local temp = 0; |
local temp = 0; |
||
if isbn_str:match( "^97[89]%d*$" ) == nil then |
if isbn_str:match( "^97[89]%d*$" ) == nil then -- isbn13 begins with 978 or 979; ismn begins with 979 |
||
return error_string; |
|||
end |
|||
return is_valid_isxn_13 (isbn_str) and '' or error_string; |
return is_valid_isxn_13 (isbn_str) and '' or error_string; |
||
end |
end |
||