73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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* eDiv Executable Stub
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* Copyleft (C) 2000-2002 Sion Ltd.
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* http://www.sionhq.com
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <string.h>
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#include <stdlib.h>
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#ifdef _DEBUG
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# include <stdio.h>
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#endif
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#include "main.h"
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#include "varindex.h"
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int GetVarOffset(tipo_t tipo, char* nombre)
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{
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byte *c, h=0;
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int bajo, alto, medio, ok=0;
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for(c=(byte*)nombre;*c;c++)
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h=((byte)(h<<1)+(h>>7))^*c;
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bajo=0;
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alto=num_indexed_vars-1;
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while(bajo<=alto) {
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medio=(bajo+alto)/2;
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if(h<varindex[medio].hash) alto=medio-1;
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else if(h>varindex[medio].hash) bajo=medio+1;
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else { ok=1; break; }
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}
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if(!ok) {
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#ifdef _DEBUG
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printf("varindex: GetVarOffset: Hash %d no encontrado (%s %s)\n",
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h,tipo==v_global?"global":tipo==v_reserved?"reserved":"local",nombre);
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#endif
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return 0;
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}
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if(medio>0) while(varindex[medio-1].hash==h) if(--medio==0) break;
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while(varindex[medio].hash==h) {
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if(varindex[medio].tipo==tipo) {
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if(!strcmp(varindex[medio].nombre,nombre)) {
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return varindex[medio].offset;
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}
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}
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medio++;
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}
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#ifdef _DEBUG
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printf("varindex: GetVarOffset: Nombre no encontrado (%s %s) hash=%d\n",
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tipo==v_global?"global":tipo==v_reserved?"reserved":"local",nombre,h);
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#endif
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return 0;
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}
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