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# Copyright (C) 92, 93, 94, 95, 1996 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:
# bug-dejagnu@prep.ai.mit.edu

# This file was written by Rob Savoye. (rob@welcomehome.org)

#
# set target variables only if needed.
#
global targetname
global connectmode
global env

if ![info exists targetname] {
    if [info exists env(TARGETNAME)] {
	set targetname $env(TARGETNAME)
    } else {
	puts stderr "ERROR: Need a target name for the udi target."
	puts stderr "       Use the --name option\n"
	exit 1
    }
}

# the default connect program to use
if ![info exists connectmode] {
    set connectmode "mondfe"
    warning "Using default of $connectmode for target communication."
    if {[which mondfe] == 0} {
	perror "\"mondfe\" does not exist. Check your path."
	exit 1
    }
}

#
# Connect to udi using mondfe
#
# HOSTNAME can be `iss' to talk to the simulator.
# The result is the value of `spawn_id' or -1 for failure.
#
proc mondfe { hostname } {
    global shell_prompt
    global spawn_id

    set retries 0
    set result  -1

    verbose "Attempting to connect to $hostname via mondfe."
    spawn mondfe -D -TIP $hostname

    expect {
	"$shell_prompt"	{ 
	    verbose "Got prompt"
	    set result 0
	}
	"*server bind*failed: Address already in use*" {
	    warning "Socket file already exists."
	    incr retries
	    if { $retries <= 2 } {
		continue -expect
	    }
	}
	-indices -re ".*(UDIERROR\[^\r\n\]*)\[\r\n\]" {
	    warning "$expect_out(1,string)"
	    continue -expect
	}
	-indices -re ".*(DFEERROR\[^\r\n\]*)\[\r\n\]" {
	    warning "$expect_out(1,string)"
	    continue -expect
	}
	timeout	{ 
	    warning "Timed out trying to connect."
	    set result -1
	    incr retries
	    if { $retries <= 2 } {
		send -i $spawn_id "\n"
		continue -expect
	    }
	}
    }

    if { $result < 0 } {
	perror "Couldn't connect after $retries retries."
	return -1
    } else {
	return $spawn_id
    }
}

#
# Downloads using the y (yank) command in mondfe
#
# SHELL_ID is the from the result of `mondfe'.
# ARG is a full path name to the file to download.
# Returns 1 if an error occured, 0 otherwise.
#
proc mondfe_download { shell_id arg } {
    global decimal		;# ??? What is this?
    global shell_prompt

    if ![file exists $arg] {
	perror "$arg doesn't exist."
	return 1
    }

    verbose "Downloading $arg." 2
    set result 1
    send -i $shell_id "y $arg\n"
    expect {
	-i $shell_id "y $arg*loading $arg*" {
	    continue -expect
	}
	-i $shell_id -re "Loading *TEXT section from\[^\r\]*\r" {
	    verbose -n "." 2
	    continue -expect
	}
	-i $shell_id -re "Loaded *TEXT section from\[^\n\]*\n" {
	    verbose " TEXT section loaded." 2
	    continue -expect
	}
	-i $shell_id -re "Loading *LIT section from\[^\r\]*\r" {
	    verbose -n "." 2
	    continue -expect
	}
	-i $shell_id -re "Loaded *LIT section from\[^\n\]*\n" {
	    verbose " LIT section loaded." 2
	    continue -expect
	}
	-i $shell_id -re "Loading *DATA section from\[^\r\]*\r" {
	    verbose -n "." 2
	    continue -expect
	}
	-i $shell_id -re "Loaded *DATA section from\[^\n\]*\n" {
	    verbose " DATA section loaded." 2
	    continue -expect
	}
	-i $shell_id -re "Clearing *BSS section from\[^\r\]*\r" {
	    verbose -n "." 2
	    continue -expect
	}
	-i $shell_id -re ".*Cleared *BSS section from.*$shell_prompt$" {
	    verbose " BSS section cleared." 2
	    verbose "Downloaded $arg successfully." 2
	    set result 0
	}
	-i $shell_id -re "DFEWARNING: $decimal : EMMAGIC:  Bad COFF file magic number.*Command failed.*$shell_prompt$" {
	    warning "Bad COFF file magic number"
	    set result 1
	}
        -i $shell_id -re ".*Ignoring COMMENT section \($decimal bytes\).*$shell_prompt$" {
            verbose "Ignoring COMMENT section" 2
            verbose "Downloaded $arg successfully." 2
            set result 0
        }
	-i $shell_id timeout {
	    perror "Timed out trying to download $arg."
	    set result 1
	}
    }

# FIXME: the following keeps the download from working
#	"Could not read COFF section" {
#	    perror "Couldn't read COFF section."
#	    set result 1
#	}

    if { $result && [info exists expect_out(buffer)] } {
	send_log $expect_out(buffer)
    }
    return $result
}

#
# Exit the remote shell
#
proc exit_mondfe { shell_id } {
    send -i $shell_id "q\n"
    expect { 
	-i $shell_id "Goodbye." {
	    verbose "Exited mondfe $shell_id"
	}
	timeout {
	    warning "mondfe didn't exit cleanly"
	}
    }

    catch "close -i $shell_id"
    return 0
}

#
# Exit the remote shell
#
proc exit_montip { shell_id } {
    verbose "exiting montip $shell_id"

    catch "close -i $shell_id"
    return 0
}