288 lines
5.5 KiB
NASM
288 lines
5.5 KiB
NASM
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DOSSEG
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.MODEL LARGE
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.CODE
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ConDevName db 'CON',0
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.286
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;++
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;
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; unsigned
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; _far
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; GetGlobalCodepage(
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; VOID
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; );
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;
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; Routine Description:
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;
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; Fetch the active global codepage
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;
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; Arguments:
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;
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; None.
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;
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; Return Value:
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;
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; 0 - error
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; non-0 - codepage
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;
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;--
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public _GetGlobalCodepage
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_GetGlobalCodepage proc far
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push bp
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mov bp,sp
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push ds
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push es
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push bx
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push si
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push di
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mov ax,6601h
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int 21h
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mov ax,0 ; don't clobber carry
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jc ggexit
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mov ax,bx
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ggexit:
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pop di
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pop si
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pop bx
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pop es
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pop ds
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leave
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retf
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_GetGlobalCodepage endp
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;++
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;
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; unsigned
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; _far
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; GetScreenCodepage(
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; VOID
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; );
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;
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; Routine Description:
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;
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; Fetch the active codepage in use for the screen (device CON).
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;
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; Arguments:
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;
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; None.
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;
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; Return Value:
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;
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; 0 - error
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; non-0 - codepage
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;
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;--
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getcp_packet equ byte ptr [bp-30]
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getcp_codepage equ word ptr [bp-28]
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public _GetScreenCodepage
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_GetScreenCodepage proc far
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push bp
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mov bp,sp
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sub sp,30
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push ds
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push es
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push bx
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push si
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push di
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;
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; Open CON
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;
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push cs
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pop ds
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mov dx,offset CS:ConDevName ; ds:dx -> device name
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mov ax,3d02h
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int 21h
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jnc @f
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mov ax,0 ; preserves carry
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jmp short gsdone
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@@: mov bx,ax ; bx = handle to CON device
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push bx ; save handle for later
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mov ax,440ch ; generic char device ioctl
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mov cx,36ah ; query selected codepage for console
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push ss
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pop ds
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lea dx,getcp_packet ; ds:dx -> return packet
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int 21h
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mov ax,0 ; assume error
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pop bx ; bx = CON device handle
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jc gsdone1
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mov ax,getcp_codepage ; ax = active codepage for CON device
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gsdone1:
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push ax ; save return code
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mov ah,3eh ; bx set from above
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int 21h ; close CON device
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pop ax ; restore return code
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gsdone:
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pop di
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pop si
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pop bx
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pop es
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pop ds
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leave
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retf
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_GetScreenCodepage endp
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;++
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;
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; BOOL
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; _far
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; SetGlobalCodepage(
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; IN unsigned Codepage
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; );
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;
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; Routine Description:
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;
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; Set the active global codepage (equivalent to chcp x).
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;
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; Arguments:
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;
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; Codepage - supplies the codepage id
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;
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; Return Value:
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;
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; Boolean value indicating outcome.
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;
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;--
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Codepage equ word ptr [bp+6]
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public _SetGlobalCodepage
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_SetGlobalCodepage proc far
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push bp
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mov bp,sp
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push ds
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push es
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push bx
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push si
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push di
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mov ax,6602h
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mov bx,Codepage
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int 21h
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mov ax,0 ; don't clobber carry
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jc sgexit
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inc ax
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sgexit:
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pop di
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pop si
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pop bx
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pop es
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pop ds
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leave
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retf
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_SetGlobalCodepage endp
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;++
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;
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; BOOL
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; _far
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; SetScreenCodepage(
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; IN unsigned Codepage
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; );
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;
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; Routine Description:
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;
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; Set the active codepage for the screen (equivalent to
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; mode con cp select=x).
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;
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; Arguments:
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;
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; Codepage - supplies the codepage id
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;
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; Return Value:
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;
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; Boolean value indicating outcome.
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;
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;--
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Codepage equ word ptr [bp+6]
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setcp_packet equ word ptr [bp-4]
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setcp_codepage equ word ptr [bp-2]
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public _SetScreenCodepage
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_SetScreenCodepage proc far
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push bp
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mov bp,sp
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sub sp,4
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push ds
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push es
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push bx
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push si
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push di
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;
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; Open CON
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;
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push cs
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pop ds
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mov dx,offset CS:ConDevName ; ds:dx -> device name
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mov ax,3d02h
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int 21h
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jnc @f
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mov ax,0 ; preserves carry
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jmp short ssdone
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@@: mov bx,ax ; bx = handle to CON device
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push bx ; save handle for later
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mov cx,34ah ; set selected codepage for console
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push ss
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pop ds
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lea dx,setcp_packet ; ds:dx -> param packet
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mov ax,Codepage
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mov setcp_codepage,ax
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mov setcp_packet,2
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mov ax,440ch ; generic char device ioctl
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int 21h
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mov ax,0 ; assume error, ax = FALSE
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pop bx ; bx = CON device handle
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jc ssdone1
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inc ax ; ax = TRUE;
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ssdone1:
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push ax ; save return code
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mov ah,3eh ; bx set from above
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int 21h ; close CON device
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pop ax ; restore return code
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ssdone:
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pop di
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pop si
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pop bx
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pop es
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pop ds
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leave
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retf
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_SetScreenCodepage endp
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end
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