# -*- shell-script -*-
# condition.sh - gdb-like "condition" debugger command
#
#   Copyright (C) 2002-2006, 2008, 2009, 2011, 2016
#   Rocky Bernstein rocky@gnu.org
#
#   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, 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; see the file COPYING.  If not, write to
#   the Free Software Foundation, 59 Temple Place, Suite 330, Boston,
#   MA 02111 USA.

_Dbg_help_add condition \
"**condition** *bp_number* *zsh-cond*

+Break only if *bassh-cond* is true in breakpoint number *bp_number*.

*bp_number* is an integer and *cond* is an zsh expression to be evaluated whenever
breakpoint *bp_number* is reached.

Examples:
---------

   condition 5 x > 10  # Breakpoint 5 now has condition x > 10
   condition 5         # Remove above condition

See also:
---------

*break*, *tbreak*.
" 1 _Dbg_complete_brkpt_range

# Set a condition for a given breakpoint $1 is a breakpoint number
# $2 is a condition. If not given, set "unconditional" or 1.
# returns 0 if success or 1 if fail.
proc _Dbg_do_condition {

  if sh-expr ' $# < 1 )' {
    _Dbg_errmsg 'condition: Argument required (breakpoint number).'
    return 1
  }

  typeset -r n=$1
  shift

  eval $_seteglob
  if [[ $n != $int_pat ]] {
    eval $_resteglob
    _Dbg_errmsg "condition: Bad breakpoint number: $n"
    return 2
  }
  eval $_resteglob

  if [[ -z ${_Dbg_brkpt_file[$n]} ]]  {
    _Dbg_msg "condition: Breakpoint entry $n is not set. Condition not changed."
    return 3
  }

  if [[ -z $condition ]]  {
    setglobal condition = '1'
    _Dbg_msg "Breakpoint $n now unconditional."
  }
  compat array-assign _Dbg_brkpt_cond '$n' $condition
  return 0
}