- set c 0
- set n [string length $buf]
- while {$c < $n} {
- set cr [string first "\r" $buf $c]
- set lf [string first "\n" $buf $c]
- if {$cr < 0} {set cr [expr $n + 1]}
- if {$lf < 0} {set lf [expr $n + 1]}
-
- if {$lf < $cr} {
- $w.m.t insert end [string range $buf $c $lf]
- set console_cr($w) [$w.m.t index {end -1c}]
- set c $lf
- incr c
- } else {
- $w.m.t delete $console_cr($w) end
- $w.m.t insert end "\n"
- $w.m.t insert end [string range $buf $c $cr]
- set c $cr
- incr c
+ if {$buf != {}} {
+ if {![winfo exists $w]} {console_init $w}
+ $w.m.t conf -state normal
+ set c 0
+ set n [string length $buf]
+ while {$c < $n} {
+ set cr [string first "\r" $buf $c]
+ set lf [string first "\n" $buf $c]
+ if {$cr < 0} {set cr [expr $n + 1]}
+ if {$lf < 0} {set lf [expr $n + 1]}
+
+ if {$lf < $cr} {
+ $w.m.t insert end [string range $buf $c $lf]
+ set console_cr($w) [$w.m.t index {end -1c}]
+ set c $lf
+ incr c
+ } else {
+ $w.m.t delete $console_cr($w) end
+ $w.m.t insert end "\n"
+ $w.m.t insert end [string range $buf $c $cr]
+ set c $cr
+ incr c
+ }