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# -*- shell-script -*-
#
# Copyright (C) 2008 Rocky Bernstein rocky@gnu.org
#
# zshdb 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.
#
# zshdb 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 zshdb; see the file COPYING. If not, write to the Free Software
# Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
# Wrap "set -x .. set +x" around a call to function $1.
# Normally we also save and restrore any trap DEBUG functions. However
# If $2 is 0 we will won't.
# The wrapped function becomes the new function and the original
# function is called old_$1.
# $? is 0 if successful.
_Dbg_help_add trace \
'trace FUNCTION | alias ALIAS -- set xtrace tracing when FUNCTION is called'
function _Dbg_do_trace_fn {
if (($# == 0)) ; then
_Dbg_errmsg "trace_fn: missing function name."
return 2
fi
typeset fn=$1
if [[ $fn == 'alias' ]]; then
shift
_Dbg_do_trace_alias "$@"
return $?
fi
typeset -ri clear_debug_trap=${2:-1}
_Dbg_is_function "$fn" $_Dbg_set_debugging || {
_Dbg_errmsg "_Dbg_do_trace_fn: \"$fn\" is not a function."
return 3
}
cmd=old_$(typeset -f -- "$fn") || {
return 4
}
typeset -ft $fn
return 0
}
function _Dbg_do_trace_alias {
if (($# == 0)) ; then
_Dbg_errmsg "_Dbg_do_trace_alias: missing alias name."
return 2
fi
typeset al=$1
if _Dbg_is_alias "$al" ; then
alias_body=$(alias $1)
alias_body="set -x; $alias_body; set +x"
alias ${al}=${alias_body}
else
_Dbg_errmsg "_Dbg_do_trace_alias: \"$al\" is not an alias."
return 3
fi
return 0
}
_Dbg_help_add untrace \
'untrace *function* untrace previosly traced *function*'
# Undo wrapping fn
# $? is 0 if successful.
function _Dbg_do_untrace_fn {
typeset -r fn=$1
if [[ -z $fn ]] ; then
_Dbg_errmsg "untrace_fn: missing or invalid function name."
return 2
fi
_Dbg_is_function "$fn" $_Dbg_set_debugging || {
_Dbg_errmsg "untrace_fn: function \"$fn\" is not a function."
return 3
}
typeset +ft $fn
return 0
}
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