diff options
Diffstat (limited to 'library/init.tcl')
| -rw-r--r-- | library/init.tcl | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/library/init.tcl b/library/init.tcl index bd04e08..9551a1c 100644 --- a/library/init.tcl +++ b/library/init.tcl @@ -3,7 +3,7 @@ # Default system startup file for Tcl-based applications. Defines # "unknown" procedure and auto-load facilities. # -# RCS: @(#) $Id: init.tcl,v 1.81 2005/09/14 17:13:18 dgp Exp $ +# RCS: @(#) $Id: init.tcl,v 1.82 2005/09/29 23:16:29 hobbs Exp $ # # Copyright (c) 1991-1993 The Regents of the University of California. # Copyright (c) 1994-1996 Sun Microsystems, Inc. @@ -95,6 +95,48 @@ namespace eval tcl { truncate ::tcl::chan::Truncate } } + + # TIP #255 min and max functions + namespace eval mathfunc { + proc min {args} { + if {[llength $args] == 0} { + return -code error \ + "too few arguments to math function \"min\"" + } + set val [lindex $args 0] + # This will handle forcing the numeric value without + # ruining the interval type of a numeric object + if {[catch {expr {double($val)}} err]} { + return -code error $err + } + foreach arg [lrange $args 1 end] { + if {[catch {expr {double($arg)}} err]} { + return -code error $err + } + if {$arg < $val} { set val $arg } + } + return $val + } + proc max {args} { + if {[llength $args] == 0} { + return -code error \ + "too few arguments to math function \"max\"" + } + set val [lindex $args 0] + # This will handle forcing the numeric value without + # ruining the interval type of a numeric object + if {[catch {expr {double($val)}} err]} { + return -code error $err + } + foreach arg [lrange $args 1 end] { + if {[catch {expr {double($arg)}} err]} { + return -code error $err + } + if {$arg > $val} { set val $arg } + } + return $val + } + } } # Windows specific end of initialization |