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kolibrios/programs/demos/aclock/trunk/cmdline.inc

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; command line parsing code for aclock
;
; Copyright (c) 2003 Thomas Mathys
; killer@vantage.ch
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
;
%ifndef _CMDLINE_INC
%define _CMDLINE_INC
;********************************************************************
; parse the command line
; input : nothing
; output : wndXPos, wndYPos, wndWidth, wndHeight
; are changed.
; destroys : nothing
;********************************************************************
parseCommandLine:
pushad
pushfd
; terminate command line, just to be sure
mov byte [cmdLine + 256],0
; go through all tokens
mov eax,cmdLine ; eax -> command line
.parseloop:
mov ebx,delimiters ; ebx -> token delimiter list
call strtok ; get next parameter
or eax,eax ; no more parameters ?
jz .nomoretokens
mov cl,[eax] ; get 1st char of parameter
cmp cl,'x' ; which parameter is it ?
je .param_x
cmp cl,'y'
je .param_y
cmp cl,'w'
je .param_w
cmp cl,'h'
je .param_h
; if we reach this line it's an unknown parameter, ignore it
.nextparam:
xor eax,eax ; set eax = 0 to continue
jmp .parseloop ; after last token.
.nomoretokens:
DBG_BOARD_PRINTDWORD [wndXPos]
DBG_BOARD_PRINTCHAR 32
DBG_BOARD_PRINTDWORD [wndYPos]
DBG_BOARD_PRINTCHAR 32
DBG_BOARD_PRINTDWORD [wndWidth]
DBG_BOARD_PRINTCHAR 32
DBG_BOARD_PRINTDWORD [wndHeight]
DBG_BOARD_PRINTNEWLINE
popfd
popad
ret
; eax -> first character of the parameter
.param_x:
push eax
call parsePositionParam
mov [wndXPos],eax
pop eax
jmp .nextparam
; eax -> first character of the parameter
.param_y:
push eax
call parsePositionParam
mov [wndYPos],eax
pop eax
jmp .nextparam
; eax -> first character of the parameter
.param_w:
push eax
call parseSizeParam
mov [wndWidth],eax
pop eax
jmp .nextparam
; eax -> first character of the parameter
.param_h:
push eax
call parseSizeParam
mov [wndHeight],eax
pop eax
jmp .nextparam
; parse position parameter
; input : eax = address of first character of parameter
; output : eax contains position
; destroys : nothing
parsePositionParam:
push ebx
push esi
pushfd
; is the second char of the parameter a '-' ?
inc eax
xor ebx,ebx ; assume it isn't
cmp byte [eax],'-'
jne .nominus
mov ebx,1 ; yes -> set flag...
inc eax ; ...and move to next char
.nominus:
; convert rest of parameter to doubleword
mov esi,eax
call string2dword
; negate if necessary
or ebx,ebx
jz .rotationshyperboloid
neg eax
.rotationshyperboloid:
popfd
pop esi
pop ebx
ret
; parse dimension parameter
; input : eax = address of first char of parameter
; output : eax contains dimension
; destroys : nothing
parseSizeParam:
push esi
pushfd
lea esi,[eax + 1] ; esi -> 2nd char of parameter
call string2dword
popfd
pop esi
ret
%endif