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xam.c

/* xa65 - 65xx/65816 cross-assembler and utility suite
 *
 * Copyright (C) 1989-1997 André Fachat (a.fachat@physik.tu-chemnitz.de)
 *
 * Memory manager/malloc() stub module
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "xah.h"         /*   structs        */

static int ninc = 0;
static char **nip = NULL;
 
void reg_include(char *path) {
      char **nip2;
      if(path && *path) {
        nip2 = realloc(nip,sizeof(char*)*(ninc+1));
        if(nip2) {
          nip = nip2;
          nip[ninc++] = path;
        } else {
          fprintf(stderr,"Warning: couldn' alloc mem (reg_include)\n");
        }
      }
}

FILE *xfopen(const char *fn,const char *mode)
{
      FILE *file;
      char c,*cp,n[MAXLINE],path[MAXLINE];
      char xname[MAXLINE], n2[MAXLINE];
      int i,l=(int)strlen(fn);

      if(l>=MAXLINE) {
        fprintf(stderr,"filename '%s' too long!\n",fn);
        return NULL;
      }

      for(i=0;i<l+1;i++) {
        xname[i]=((fn[i]=='\\')?DIRCHAR:fn[i]);
      }

      if(mode[0]=='r')
      {
          if((file=fopen(fn,mode))==NULL 
                  && (file=fopen(xname, mode))==NULL) {
            for(i=0;(!file) && (i<ninc);i++) {
              strcpy(n,nip[i]);
              c=n[(int)strlen(n)-1];
              if(c!=DIRCHAR) strcat(n,DIRCSTRING);
              strcpy(n2,n);
              strcat(n2,xname);
              strcat(n,fn);
/* printf("name=%s,n2=%s,mode=%s\n",n,n2,mode); */
              file=fopen(n,mode);
              if(!file) file=fopen(n2,mode);
            }
            if((!file) && (cp=getenv("XAINPUT"))!=NULL)
            {
                  strcpy(path,cp);
                  cp=strtok(path,",");
                  while(cp && !file)
                  {
                        if(cp[0])
                        {
                              strcpy(n,cp);
                              c=n[(int)strlen(n)-1];
                              if(c!=DIRCHAR&&c!=':')
                                    strcat(n,DIRCSTRING);
                              strcpy(n2,n);
                              strcat(n2,xname);
                              strcat(n,fn);
/* printf("name=%s,n2=%s,mode=%s\n",n,n2,mode); */
                              file=fopen(n,mode);
                              if(!file) file=fopen(n2,mode);
                        }
                        cp=strtok(NULL,",");
                  }
            }
          }
      } else
      {
            if((cp=getenv("XAOUTPUT"))!=NULL)
            {
                  strcpy(n,cp);
                  if(n[0])
                  {
                        c=n[(int)strlen(n)-1];
                        if(c!=DIRCHAR&&c!=':')
                              strcat(n,DIRCSTRING);
                  }
                  cp=strrchr(fn,DIRCHAR);
                  if(!cp)
                  {
                        cp=strrchr(fn,':');
                        if(!cp)
                              cp=(char*)fn;
                        else
                              cp++;
                  } else
                        cp++;
                  strcat(n,cp);
                  file=fopen(n,mode);
            } else
                  file=fopen(fn,mode);
      }
      if(file)
            setvbuf(file,NULL,_IOFBF,BUFSIZE);

      return(file);           
}

#if 0

static char *m_base;
static char *m_act;
static char *m_end;

int m_init(void) 
{
     int er=E_NOMEM;

     m_base=m_end=m_act=0L;
/*
     fprintf(stderr, "MEMLEN=%ld\n",MEMLEN);
     getchar();
*/    
/*
     if ((m_base=(char*)malloc(MEMLEN))!=NULL)
     {
          m_end =m_base+MEMLEN;
          m_act =(char*)(((long)m_base+3)&0xfffffffcl);
          er=E_OK;
     }
     else m_base=NULL;
*/
    er=E_OK;

     return(er);
}

void m_exit(void)
{
/*
      free(m_base);
*/
}

int m_alloc(long n, char **adr)
{
     int er=E_NOMEM;

     if((*adr=calloc(n,1))) {
      er=E_OK;
     }
/*
     if(m_act+n<m_end)
     {
          *adr=m_act;
          m_act=m_act+n;
          er=E_OK;
     }
*/
/*
     fprintf(stderr, "m_alloc n=%ld adr=%lx\n",n,*adr);
     getchar();
*/     
     return(er);
}

#endif

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