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/********************************************************************************
* *
* P a r s e G e o m e t r y F r o m C o m m a n d L i n e *
* *
*********************************************************************************
* Copyright (C) 2002,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This library 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 Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/> *
********************************************************************************/
#include "xincs.h"
#include "fxver.h"
#include "fxdefs.h"
/*
Notes:
- Programmer must call this to parse geometry from command
line parameter "-g" or "--geometry"; first initialize input/output
arguments to their default values, the ones parsed will be
overridden.
*/
using namespace FX;
/*******************************************************************************/
namespace FX {
// Parse string of the form:
//
// [=][<width>{xX}<height>][{+-}<xoffset>{+-}<yoffset>]
//
// Return or of flags:
//
// 1 x was assigned
// 2 y was assigned
// 4 width was assigned
// 8 height was assigned
FXint fxparsegeometry(const FXchar *string,FXint& x,FXint& y,FXint& w,FXint& h){
FXint result=0;
// Got string?
if(string && *string!='\0'){
FXint tw=0;
FXint th=0;
FXint tx=0;
FXint ty=0;
FXint mul;
// Parse white space
while(*string==' ' || *string=='\t'){
string++;
}
// Skip leading '=', if any
if(*string=='=') string++;
// Start with width
if(*string!='+' && *string!='-' && *string!='x' && *string!='X'){
while('0'<=*string && *string<='9'){
tw=tw*10+(*string++-'0');
result|=4; // At least one digit found
}
}
// Then height
if(*string=='x' || *string=='X'){
string++;
while('0'<=*string && *string<='9'){
th=th*10+(*string++-'0');
result|=8; // At least one digit found
}
}
// Then x
if(*string=='+' || *string== '-'){
if(*string++ == '-') mul=-1; else mul=1;
while('0'<=*string && *string<='9'){
tx=tx*10+(*string++-'0');
result|=1; // At least one digit found
}
tx*=mul;
}
// Then y
if(*string=='+' || *string == '-'){
if(*string++ == '-') mul=-1; else mul=1;
while('0'<=*string && *string<='9'){
ty=ty*10+(*string++-'0');
result|=2; // At least one digit found
}
ty*=mul;
}
// Parse white space
while(*string==' ' || *string=='\t'){
string++;
}
// Got the whole string
if(*string=='\0'){
// Return what was found
if(result&1) x=tx;
if(result&2) y=ty;
if(result&4) w=tw;
if(result&8) h=th;
}
}
return result;
}
}
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