source: vendor/binutils/current/gprof/source.c

/* source.c - Keep track of source files.

   Copyright 2000, 2001, 2002 Free Software Foundation, Inc.

   This file is part of GNU Binutils.

   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., 59 Temple Place - Suite 330, Boston, MA
   02111-1307, USA.  */


#include "gprof.h"
#include "libiberty.h"
#include "filenames.h"
#include "search_list.h"
#include "source.h"

#define EXT_ANNO "-ann"         /* Postfix of annotated files.  */

/* Default option values.  */
bfd_boolean create_annotation_files = FALSE;

Search_List src_search_list = {0, 0};
Source_File *first_src_file = 0;


Source_File *
source_file_lookup_path (path)
     const char *path;
{
  Source_File *sf;

  for (sf = first_src_file; sf; sf = sf->next)
    {
      if (FILENAME_CMP (path, sf->name) == 0)
        break;
    }

  if (!sf)
    {
      /* Create a new source file descriptor.  */
      sf = (Source_File *) xmalloc (sizeof (*sf));

      memset (sf, 0, sizeof (*sf));

      sf->name = xstrdup (path);
      sf->next = first_src_file;
      first_src_file = sf;
    }

  return sf;
}


Source_File *
source_file_lookup_name (filename)
     const char *filename;
{
  const char *fname;
  Source_File *sf;

  /* The user cannot know exactly how a filename will be stored in
     the debugging info (e.g., ../include/foo.h
     vs. /usr/include/foo.h).  So we simply compare the filename
     component of a path only.  */
  for (sf = first_src_file; sf; sf = sf->next)
    {
      fname = strrchr (sf->name, '/');

      if (fname)
        ++fname;
      else
        fname = sf->name;

      if (FILENAME_CMP (filename, fname) == 0)
        break;
    }

  return sf;
}


FILE *
annotate_source (sf, max_width, annote, arg)
     Source_File *sf;
     unsigned int max_width;
     void (*annote) PARAMS ((char *, unsigned int, int, void *));
     void *arg;
{
  static bfd_boolean first_file = TRUE;
  int i, line_num, nread;
  bfd_boolean new_line;
  char buf[8192];
  char fname[PATH_MAX];
  char *annotation, *name_only;
  FILE *ifp, *ofp;
  Search_List_Elem *sle = src_search_list.head;

  /* Open input file.  If open fails, walk along search-list until
     open succeeds or reaching end of list.  */
  strcpy (fname, sf->name);

  if (IS_ABSOLUTE_PATH (sf->name))
    sle = 0;                    /* Don't use search list for absolute paths.  */

  name_only = 0;
  while (TRUE)
    {
      DBG (SRCDEBUG, printf ("[annotate_source]: looking for %s, trying %s\n",
                             sf->name, fname));

      ifp = fopen (fname, FOPEN_RB);
      if (ifp)
        break;

      if (!sle && !name_only)
        {
          name_only = strrchr (sf->name, '/');
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
          {
            char *bslash = strrchr (sf->name, '\\');
            if (name_only == NULL || (bslash != NULL && bslash > name_only))
              name_only = bslash;
            if (name_only == NULL && sf->name[0] != '\0' && sf->name[1] == ':')
              name_only = (char *)sf->name + 1;
          }
#endif
          if (name_only)
            {
              /* Try search-list again, but this time with name only.  */
              ++name_only;
              sle = src_search_list.head;
            }
        }

      if (sle)
        {
          strcpy (fname, sle->path);
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
          /* d:foo is not the same thing as d:/foo!  */
          if (fname[strlen (fname) - 1] == ':')
            strcat (fname, ".");
#endif
          strcat (fname, "/");

          if (name_only)
            strcat (fname, name_only);
          else
            strcat (fname, sf->name);

          sle = sle->next;
        }
      else
        {
          if (errno == ENOENT)
            fprintf (stderr, _("%s: could not locate `%s'\n"),
                     whoami, sf->name);
          else
            perror (sf->name);

          return 0;
        }
    }

  ofp = stdout;

  if (create_annotation_files)
    {
      /* Try to create annotated source file.  */
      const char *filename;

      /* Create annotation files in the current working directory.  */
      filename = strrchr (sf->name, '/');
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
        {
          char *bslash = strrchr (sf->name, '\\');
          if (filename == NULL || (bslash != NULL && bslash > filename))
            filename = bslash;
          if (filename == NULL && sf->name[0] != '\0' && sf->name[1] == ':')
            filename = sf->name + 1;
        }
#endif
      if (filename)
        ++filename;
      else
        filename = sf->name;

      strcpy (fname, filename);
      strcat (fname, EXT_ANNO);
#ifdef __MSDOS__
      {
        /* foo.cpp-ann can overwrite foo.cpp due to silent truncation of
           file names on 8+3 filesystems.  Their `stat' better be good...  */
        struct stat buf1, buf2;

        if (stat (filename, &buf1) == 0
            && stat (fname, &buf2) == 0
            && buf1.st_ino == buf2.st_ino)
          {
            char *dot = strrchr (fname, '.');

            if (dot)
              *dot = '\0';
            strcat (fname, ".ann");
          }
      }
#endif
      ofp = fopen (fname, "w");

      if (!ofp)
        {
          perror (fname);
          return 0;
        }
    }

  /* Print file names if output goes to stdout
     and there are more than one source file.  */
  if (ofp == stdout)
    {
      if (first_file)
        first_file = FALSE;
      else
        fputc ('\n', ofp);

      if (first_output)
        first_output = FALSE;
      else
        fprintf (ofp, "\f\n");

      fprintf (ofp, _("*** File %s:\n"), sf->name);
    }

  annotation = xmalloc (max_width + 1);
  line_num = 1;
  new_line = TRUE;

  while ((nread = fread (buf, 1, sizeof (buf), ifp)) > 0)
    {
      for (i = 0; i < nread; ++i)
        {
          if (new_line)
            {
              (*annote) (annotation, max_width, line_num, arg);
              fputs (annotation, ofp);
              ++line_num;
              new_line = FALSE;
            }

          new_line = (buf[i] == '\n');
          fputc (buf[i], ofp);
        }
    }

  free (annotation);
  return ofp;
}