4.3BSD - /usr/src/ucb/pascal/pdx/mappings/srcfile.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)srcfile.c	5.1 (Berkeley) 6/6/85";
   9: #endif not lint
  10: 
  11: /*
  12:  * get the source file name associated with a given address
  13:  */
  14: 
  15: #include "defs.h"
  16: #include "mappings.h"
  17: #include "object.h"
  18: #include "filetab.h"
  19: 
  20: char *srcfilename(addr)
  21: ADDRESS addr;
  22: {
  23:     register ADDRESS i, j, k;
  24:     ADDRESS a;
  25:     FILETAB *ftp;
  26: 
  27:     if (addr < filetab[0].addr) {
  28:         return(NIL);
  29:     }
  30:     i = 0;
  31:     j = nlhdr.nfiles - 1;
  32:     while (i < j) {
  33:         k = (i + j) / 2;
  34:         ftp = &filetab[k];
  35:         if ((a = ftp->addr) == addr) {
  36:             return(ftp->filename);
  37:         } else if (addr > a) {
  38:             i = k + 1;
  39:         } else {
  40:             j = k - 1;
  41:         }
  42:     }
  43:     if (addr >= filetab[i].addr) {
  44:         return(filetab[i].filename);
  45:     } else {
  46:         return(filetab[i-1].filename);
  47:     }
  48:     /*NOTREACHED*/
  49: }

Defined functions

Defined variables