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Index > Main > up/low case, with a lut.

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edfed



Joined: 20 Feb 2006
Posts: 4242
Location: 2018
edfed
hello, today, i've made a basic function set to change the case of chars.
it takes the modifier from a 256 bytes LUT, and it translates the char.

then, of course, it is using the charset of européan letters. with accents, etc...


let's go!!

Code:
;;change case:
;usage:
;
;force lower case:
;       mov al,char
;       call case.low
;
;force upper case:
;       mov al,char
;       call case.up
;
;inverse case:
;       mov al,char
;       call case.inv
case:
;al=char
;trashes eax,ebx
.low:
        mov ah,al
        mov ebx,.lut
        xlatb
        or ah,al
        mov al,ah
        ret
.up:
        mov ah,al
        mov ebx,.lut
        xlatb
        not al
        and ah,al
        mov al,ah
        ret
.inv:
        mov ah,al
        mov ebx,.lut
        xlatb
        xor ah,al
        mov al,ah
        ret
.lut:
.00 db 0          ;.
.01 db 0          ;.
.02 db 0          ;.
.03 db 0          ;.
.04 db 0          ;.
.05 db 0          ;.
.06 db 0          ;.
.07 db 0          ;.
.08 db 0          ;.
.09 db 0          ;.
.0A db 0          ;.
.0B db 0          ;.
.0C db 0          ;.
.0D db 0          ;.
.0E db 0          ;.
.0F db 0          ;.
.10 db 0          ;.
.11 db 0          ;.
.12 db 0          ;.
.13 db 0          ;.
.14 db 0          ;.
.15 db 0          ;.
.16 db 0          ;.
.17 db 0          ;.
.18 db 0          ;.
.19 db 0          ;.
.1A db 0          ;.
.1B db 0          ;.
.1C db 0          ;.
.1D db 0          ;.
.1E db 0          ;.
.1F db 0          ;.
.20 db 0          ;
.21 db 0          ;!
.22 db 0          ;"
.23 db 0          ;#
.24 db 0          ;$
.25 db 0          ;%
.26 db 0          ;&
.27 db 0          ;'
.28 db 0          ;(
.29 db 0          Wink
.2A db 0          ;*
.2B db 0          ;+
.2C db 0          ;,
.2D db 0          ;-
.2E db 0          ;.
.2F db 0          ;/
.30 db 0          ;0
.31 db 0          ;1
.32 db 0          ;2
.33 db 0          ;3
.34 db 0          ;4
.35 db 0          ;5
.36 db 0          ;6
.37 db 0          ;7
.38 db 0          ;8
.39 db 0          ;9
.3A db 0          ;:
.3B db 0          ;;
.3C db 0          ;<
.3D db 0          ;=
.3E db 0          ;>
.3F db 0          ;?
.40 db 0          ;@
.41 db 20h        ;Aa
.42 db 20h        ;Bb
.43 db 20h        ;Cc
.44 db 20h        ;Dd
.45 db 20h        ;Ee
.46 db 20h        ;Ff
.47 db 20h        ;Gg
.48 db 20h        ;Hh
.49 db 20h        ;Ii
.4A db 20h        ;Jj
.4B db 20h        ;Kk
.4C db 20h        ;Ll
.4D db 20h        ;Mm
.4E db 20h        ;Nn
.4F db 20h        ;Oo
.50 db 20h        ;Pp
.51 db 20h        ;Qq
.52 db 20h        ;Rr
.53 db 20h        ;Ss
.54 db 20h        ;Tt
.55 db 20h        ;Uu
.56 db 20h        ;Vv
.57 db 20h        ;Ww
.58 db 20h        ;Xx
.59 db 20h        ;Yy
.5A db 20h        ;Zz
.5B db 0          ;[
.5C db 0          ;\
.5D db 0          ;]
.5E db 0          ;^
.5F db 0          ;_
.60 db 0          ;`
.61 db 20h        ;aA
.62 db 20h        ;bB
.63 db 20h        ;cC
.64 db 20h        ;dD
.65 db 20h        ;eE
.66 db 20h        ;fF
.67 db 20h        ;gG
.68 db 20h        ;hH
.69 db 20h        ;iI
.6A db 20h        ;jJ
.6B db 20h        ;kK
.6C db 20h        ;lL
.6D db 20h        ;mM
.6E db 20h        ;nN
.6F db 20h        ;oO
.70 db 20h        ;pP
.71 db 20h        ;qQ
.72 db 20h        ;rR
.73 db 20h        ;sS
.74 db 20h        ;tT
.75 db 20h        ;uU
.76 db 20h        ;vV
.77 db 20h        ;wW
.78 db 20h        ;xX
.79 db 20h        ;yY
.7A db 20h        ;zZ
.7B db 0          ;{
.7C db 0          ;|
.7D db 0          ;}
.7E db 0          ;~
.7F db 0          ;.
.80 db 0          ;€
.81 db 0          ;.
.82 db 0          ;‚
.83 db 0          
.84 db 0          ;„
.85 db 0          ;…
.86 db 0          ;†
.87 db 0          ;‡
.88 db 0          
.89 db 0          ;‰
.8A db 10h        ;Šš
.8B db 0          ;‹
.8C db 10h        ;Œœ
.8D db 0          ;.
.8E db 0          
.8F db 0          ;.
.90 db 0          ;.
.91 db 0          ;‘
.92 db 0          ;’
.93 db 0          ;“
.94 db 0          ;”
.95 db 0          ;•
.96 db 0          ;–
.97 db 0          ;—
.98 db 0          
.99 db 0          ;™
.9A db 10h        ;šŠ
.9B db 0          ;›
.9C db 10h        ;œŒ
.9D db 0          ;.
.9E db 0          
.9F db 60h        ;Ÿÿ
.A0 db 0          ; 
.A1 db 0          
.A2 db 0          
.A3 db 0          
.A4 db 0          
.A5 db 0          
.A6 db 0          
.A7 db 0          
.A8 db 0          
.A9 db 0          
.AA db 0          
.AB db 0          
.AC db 0          
.AD db 0          
.AE db 0          
.AF db 0          
.B0 db 0          
.B1 db 0          
.B2 db 0          
.B3 db 0          
.B4 db 0          
.B5 db 0          
.B6 db 0          
.B7 db 0          
.B8 db 0          
.B9 db 0          
.BA db 0          
.BB db 0          
.BC db 0          
.BD db 0          
.BE db 0          
.BF db 0          ;¿
.C0 db 20h        ;Àà
.C1 db 20h        ;Áá
.C2 db 20h        ;Ââ
.C3 db 20h        ;Ãã
.C4 db 20h        ;Ää
.C5 db 20h        ;Åå
.C6 db 20h        ;Ææ
.C7 db 20h        ;Çç
.C8 db 20h        ;Èè
.C9 db 20h        ;Éé
.CA db 20h        ;Êê
.CB db 20h        ;Ëë
.CC db 20h        ;Ìì
.CD db 20h        ;Íí
.CE db 20h        ;Îî
.CF db 20h        ;Ïï
.D0 db 20h        ;Ðð
.D1 db 20h        ;Ññ
.D2 db 20h        ;Òò
.D3 db 20h        ;Óó
.D4 db 20h        ;Ôô
.D5 db 20h        ;Õõ
.D6 db 20h        ;Öö
.D7 db 0          
.D8 db 20h        ;Øø
.D9 db 20h        ;Ùù
.DA db 20h        ;Úú
.DB db 20h        ;Ûû
.DC db 20h        ;Üü
.DD db 20h        ;Ýý
.DE db 20h        ;Þþ
.DF db 0          
.E0 db 20h        ;àÀ
.E1 db 20h        ;áÁ
.E2 db 20h        ;âÂ
.E3 db 20h        ;ãÃ
.E4 db 20h        ;äÄ
.E5 db 20h        ;åÅ
.E6 db 20h        ;æÆ
.E7 db 20h        ;çÇ
.E8 db 20h        ;èÈ
.E9 db 20h        ;éÉ
.EA db 20h        ;êÊ
.EB db 20h        ;ëË
.EC db 20h        ;ìÌ
.ED db 20h        ;íÍ
.EE db 20h        ;îÎ
.EF db 20h        ;ïÏ
.F0 db 20h        ;ðÐ
.F1 db 20h        ;ñÑ
.F2 db 20h        ;òÒ
.F3 db 20h        ;óÓ
.F4 db 20h        ;ôÔ
.F5 db 20h        ;õÕ
.F6 db 20h        ;öÖ
.F7 db 0          
.F8 db 20h        ;øØ
.F9 db 20h        ;ùÙ
.FA db 20h        ;úÚ
.FB db 20h        ;ûÛ
.FC db 20h        ;üÜ
.FD db 20h        ;ýÝ
.FE db 20h        ;þÞ
.FF db 60h        ;ÿŸ         
    


to use it, just include it in your source.

i am not responsible for the explosion of your fridge nor the tsunami.


Last edited by edfed on 14 Mar 2011, 23:50; edited 1 time in total
Post 14 Mar 2011, 19:06
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b1528932



Joined: 21 May 2010
Posts: 287
b1528932
Any reaosn besides video text modes to use this?
Post 14 Mar 2011, 20:04
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edfed



Joined: 20 Feb 2006
Posts: 4242
Location: 2018
edfed
i don't know, maybe just text files edition.

as i saw, under linux, it is not the same as under DOS.

names of files are always f***g case sensitive under linux.
that's a little boring because, when i write a name under windows, the name can be in lowase...
and DOS makes something, it puts every chars in UP case.
then, the problem, when i try to compile under linux is...
file not found, file not found, etc...

that's one reason to create a up/low case function.

after, in text editors too it can be very good to have lowcase, upcase, reversecase function, on right click...
etc.
Post 14 Mar 2011, 20:47
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