mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-11 17:44:09 +03:00
49 lines
1017 B
PHP
49 lines
1017 B
PHP
;---------------------------------------------------------------------
|
||
char_toupper:
|
||
; convert character to uppercase, using cp866 encoding
|
||
; in: al=symbol
|
||
; out: al=converted symbol
|
||
cmp al, 'a'
|
||
jb .ret
|
||
cmp al, 'z'
|
||
jbe .az
|
||
cmp al, ' '
|
||
jb .ret
|
||
cmp al, 'à'
|
||
jb .rus1
|
||
cmp al, 'ï'
|
||
ja .ret
|
||
; 0xE0-0xEF -> 0x90-0x9F
|
||
sub al, 'à'-'<27>'
|
||
.ret:
|
||
ret
|
||
.rus1:
|
||
; 0xA0-0xAF -> 0x80-0x8F
|
||
.az:
|
||
and al, not 0x20
|
||
ret
|
||
;---------------------------------------------------------------------
|
||
char_todown:
|
||
; convert character to lowercase, using cp866 encoding
|
||
; in: al=symbol
|
||
; out: al=converted symbol
|
||
cmp al, 'A'
|
||
jb .ret
|
||
cmp al, 'Z'
|
||
jbe .az
|
||
cmp al, '€'
|
||
jb .ret
|
||
cmp al, '<27>'
|
||
jb .rus1
|
||
cmp al, 'Ÿ'
|
||
ja .ret
|
||
; 0x90-0x9F -> 0xE0-0xEF
|
||
add al, 'à'-'<27>'
|
||
.ret:
|
||
ret
|
||
.rus1:
|
||
; 0x80-0x8F -> 0xA0-0xAF
|
||
.az:
|
||
add al, 0x20
|
||
ret
|
||
;--------------------------------------------------------------------- |