BSD 4_2 release

[unix-history] / usr / src / ucb / pascal / pdx / mappings / objaddr.c

/* Copyright (c) 1982 Regents of the University of California */

static char sccsid[] = "@(#)objaddr.c 1.2 2/17/82";

/*
* Lookup the object address of a given line from the named file.
*
* Potentially all files in the file table need to be checked
* until the line is found since a particular file name may appear
* more than once in the file table (caused by includes).
*/

#include "defs.h"
#include "mappings.h"
#include "object.h"
#include "source.h"
#include "filetab.h"
#include "linetab.h"

ADDRESS objaddr(line, name)
LINENO line;
char *name;
{
   register FILETAB *ftp;
   register LINENO i, j;
   BOOLEAN foundfile;

   if (nlhdr.nlines == 0) {
       return(-1);
   }
   if (name == NULL) {
       name = cursource;
   }
   foundfile = FALSE;
   for (ftp = &filetab[0]; ftp < &filetab[nlhdr.nfiles]; ftp++) {
       if (streq(ftp->filename, name)) {
           foundfile = TRUE;
           i = ftp->lineindex;
           if (ftp == &filetab[nlhdr.nfiles-1]) {
               j = nlhdr.nlines;
           } else {
               j = (ftp + 1)->lineindex;
           }
           while (i < j) {
               if (linetab[i].line == line) {
                   return linetab[i].addr;
               }
               i++;
           }
       }
   }
   if (!foundfile) {
       error("unknown source file \"%s\"", name);
   }
   return(-1);
}