# -*- shell-script -*-
# Things related to file handling.
#
#   Copyright (C) 2002, 2003, 2004, 2006, 2008, 2009, 2010, 2014 Rocky Bernstein
#   rocky@gnu.org
#
#   bashdb 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, or (at your option) any later
#   version.
#
#   bashdb 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 bashdb; see the file COPYING.  If not, write to the Free Software
#   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.

# Directory search patch for unqualified file names

typeset -a _Dbg_dir = ''
setglobal _Dbg_dir = '(''\$cdir' '\$cwd' )

# _Dbg_cdir is the directory in which the script is located.
[[ -z ${_Dbg_cdir} ]] && typeset _Dbg_cdir = $(_Dbg_source_file%/*)
[[ -z ${_Dbg_cdir} ]] && typeset _Dbg_cdir = $[pwd]

# Either fill out or strip filename as determined by "basename_only"
# and annotate settings
proc _Dbg_adjust_filename {
  typeset -r filename = $1
  if sh-expr ' _Dbg_set_annotate == 1 '  {
    echo $[_Dbg_resolve_expand_filename $filename]
  } elif sh-expr '_Dbg_set_basename'  {
    echo $(filename##*/)
  } else {
    echo $filename
  }
}

# Canonicalize $1. For now if _Dbg_set_basename is set we just want
# the basename of that.
proc _Dbg_file_canonic {
    if sh-expr ' $# != 1 '  {
	echo '??'
	return 1
    }
    typeset filename = $1
    sh-expr ' _Dbg_set_basename ' && setglobal filename = $(filename##*/)
    echo $filename
    return 0
}

# $1 contains the name you want to glob. return 0 if exists and is
# readable or 1 if not.
# The result will be in variable $filename which is assumed to be
# local'd by the caller
proc _Dbg_tilde_expand_filename {
  typeset cmd = ""filename=\$(builtin echo $1)""
  eval $cmd
  [[ -r $filename ]]
}

#
# Resolve $1 to a full file name which exists. First see if filename has been
# mentioned in a debugger "file" command. If not and the file name
# is a relative name use _Dbg_dir to substitute a relative directory name.
#
proc _Dbg_resolve_expand_filename {

  if sh-expr ' $# == 0 '  {
    _Dbg_errmsg \
	"Internal debug error _Dbg_resolve_expand_filename(): null file to find"
    echo ''
    return 1
  }
  typeset find_file = $1

  # Is this one of the files we've that has been specified in a debugger
  # "FILE" command?
  typeset found_file = ''
  setglobal found_file = $(_Dbg_file2canonic[$find_file])
  if [[ -n  $found_file ]]  {
    echo $found_file
    return 0
  }

  if [[ ${find_file:0:1} == '/' ]]  {
    # Absolute file name
    setglobal full_find_file = $[_Dbg_expand_filename $find_file]
    echo $full_find_file
    return 0
  } elif [[ ${find_file:0:1} == '.' ]]  {
    # Relative file name
    setglobal full_find_file = $[_Dbg_expand_filename "$(_Dbg_init_cwd)/$find_file]
    if [[ -z "$full_find_file" ]] || [[ ! -r $full_find_file ]] {
      # Try using cwd rather that Dbg_init_cwd
      setglobal full_find_file = $[_Dbg_expand_filename $find_file]
    }
    echo $full_find_file
    return 0
  } else {
    # Resolve file using _Dbg_dir
    typeset -i n = $(#_Dbg_dir[@])
    typeset -i i = ''
    for (( i=0 ; i < n; i++ )) ; do
      typeset basename="${_Dbg_dir[i]}"
      if [[  $basename == '\$cdir' ]] ; then
	basename=$_Dbg_cdir
      elif [[ $basename == '\$cwd' ]] ; then
	basename=$(pwd)
      fi
      if [[ -f "$basename/$find_file" ]] ; then
	echo "$basename/$find_file"
	return 0
      fi
    done
  }
  echo ''
  return 1
}