#   Copyright (C) 1988, 1990, 1991, 1992 Free Software Foundation, Inc.

# 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

# Please email any bugs, comments, and/or additions to this file to:
# DejaGnu@cygnus.com

# This file was written by Rob Savoye. (rob@cygnus.com)

# variables that need to set up
#
if ![info exists prompt] then {
    set prompt "\(gdb\)"
}
# some convenience abbreviations
#
if ![info exists hex] then {
    set hex "0x\[0-9A-Fa-f\]+"
}
if ![info exists decimal] then {
    set decimal "\[0-9\]+"
}

#
# gdb_version -- extract and print the version number of gcc
#
proc gdb_version {} {
    global GDB
    global GDBFLAGS
    set tmp [exec echo "q" | $GDB]
    set version [lindex $tmp [lsearch $tmp "\[0-9\]*"]]
    set version [string range $version 0 [expr [string length $version]-2]]
    clone_output "[which $GDB] version $version $GDBFLAGS\n"
}

#
# gdb_unload -- unload a file if one is loaded
#

proc gdb_unload {} {
    global verbose
    global GDB
    global prompt
    send "file\n"
    expect {
	-re "No exec file now\.\r" { continue -expect }
	-re "No symbol file now\.\r" { continue -expect }
	-re "A program is being debugged already..*Kill it\? \(y or n\) $"\
	    { send "y\n"
		if $verbose>1 then {
		    send_user "\t\tKilling previous program being debugged\n"
		}
	    continue -expect
	}
	-re "Discard symbol table from .*\? \(y or n\) $" {
	    send "y\n"
	    continue -expect
	}
	-re "$prompt $" {}
	timeout {
	    error "Couldn't unload file in $GDB (timed out)."
	    return -1
	}
    }
}

#
# gdb_load -- load a file into the debugger.
#             return a -1 if anything goes wrong.
#
proc gdb_load { arg } {
    global verbose
    global loadpath
    global loadfile
    global GDB
    global prompt

    set loadfile [file tail $arg]
    set loadpath [file dirname $arg]
    send "file $arg\n"
    expect {
	-re "Reading symbols from.*done.*$prompt $"\
	    { if $verbose>1 then {
		send_user "\t\tLoaded $arg into the $GDB\n"
	    }
	    }
	-re "has no symbol-table.*$prompt $" {
	    error "$arg wasn't compiled with \"-g\"\n"
	    return -1
	}
	-re "A program is being debugged already..*Kill it\? \(y or n\) $"\
	    { send "y\n"
		if $verbose>1 then {
		    send_user "\t\tKilling previous program being debugged\n"
		}
	    continue -expect
	}
	-re "Load new symbol table from.*\? \(y or n\) $"\
	  { send "y\n"
	    expect {
		-re "Reading symbols from.*done.*$prompt $"
		{ if $verbose>1 then {
		    send_user "\t\tLoaded $arg with new symbol table into $GDB\n"
		}
		}
		timeout		{ error "(timeout) Couldn't load $arg, other program already loaded."; return -1 }
	    }
	}
	-re ".*No such file or directory.*$prompt $"\
	    { error "($arg) No such file or directory\n"; return -1 }
	-re "$prompt $" { error "couldn't load $arg into $GDB."; return -1 }
	timeout		{ error "couldn't load $arg into $GDB (timed out)."; return -1 }
    }
}

#
# gdb_exit -- kills the gdb process currently running
#
proc gdb_exit {} {
    global verbose
    global GDB
    global GDBFLAGS
    set timeout 1

    if $verbose>1 then {
	send_user "Quitting $GDB $GDBFLAGS\n"
    }    
    catch "send \"quit\n\"" result
    if [string match "write\(spawn_id=\[0-9\]+\): Bad file number" $result] then {
	catch "close"
	return 0
    }
    expect {
	eof                 { 
	    if $verbose>1 then {
		send_user "Got EOF from $GDB\n"
	    }
	}
	timeout             { 
	    if $verbose>1 then {
		send_user "Got TIMEOUT from $GDB\n"
	    }
	    close
	}
	-re "The program is running.  Quit anyway? (y or n) $"\
	    { send "y\n"
		if $verbose>1 then {
		    send_user "\t\tKilling program being debugged\n"
		}
	        close
	    }
    }
    catch "close"

    if $verbose>1 then {
	send_user "Quitting $GDB $GDBFLAGS\n"
    }    
}

#
# start gdb -- start gdb running
#

proc gdb_start {} {
    global verbose
    global GDB
    global GDBFLAGS
    global prompt
    global spawn_id
    global timeout
    if $verbose>1 then {
	send_user "Spawning $GDB $GDBFLAGS\n"
    }

    set oldtimeout $timeout
    set timeout [expr "$timeout + 60"]
    if [ llength $GDBFLAGS ] then {
	spawn $GDB $GDBFLAGS
    } else {
	spawn $GDB
    }
    expect {
	-re ".*$prompt $"	{ if $verbose>1 then {
	    send_user "GDB initialized for native mode\n" }
	}
	-re "$prompt $"	{ error "GDB never initialized."; return -1 }
	timeout		{ error "(timeout) GDB never initialized."; return -1 }
    }
    set timeout $oldtimeout
    # force the height to "unlimited", so no pagers get used
    send "set height 0\n"
    expect -re ".*$prompt $" {}
    # force the width to "unlimited", so no wraparound occurs
    send "set width 0\n"
    expect -re ".*$prompt $" {}
}

expect_after {
    "<return>"		   { send "\n"; error "Window too small." }
    -re "\(y or n\) " 	   { send "n\n"; error "Got interactive prompt." }
    buffer_full		   { error "internal buffer is full." }
    eof			   { error "eof -- pty is hosed." }
    timeout			   { error "timeout." }
    "virtual memory exhausted" { error "virtual memory exhausted." }
    "Undefined command"	   { error "send string probably wrong." }
}

load_lib gdb.exp

set binpath /s1/users/rob/vxworks/bin/somewhere-bogus-that-needs-configuring
set bin $GDB

gdb_start