# New Ticket Created by  Alberto Simoes 
# Please include the string:  [perl #38067]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/rt3/Ticket/Display.html?id=38067 >



-- 
Alberto Simões - Departamento de Informática - Universidade do Minho
                  Campus de Gualtar - 4710-057 Braga - Portugal
Index: languages/tcl/t/cmd_string.t
===================================================================
--- languages/tcl/t/cmd_string.t        (revision 10775)
+++ languages/tcl/t/cmd_string.t        (working copy)
@@ -2,7 +2,8 @@
 
 use strict;
 use lib qw(tcl/t t . ../lib ../../lib ../../../lib);
-use Parrot::Test tests => 109;
+
+use Parrot::Test tests => 115;
 use Parrot::Config;
 use Test::More;
 
@@ -551,7 +552,43 @@
 OUT
 
 
+language_output_is("tcl",<<'TCL',<<OUT,"string replace, bad args");
+    string replace
+TCL
+wrong # args: should be "string replace string first last ?string?"
+OUT
 
+language_output_is("tcl",<<'TCL',<<OUT,"string replace, simple");
+    puts [string replace parrcamelot 4 8]
+TCL
+parrot
+OUT
+
+language_output_is("tcl",<<'TCL',<<OUT,"string replace, negative index");
+    puts [string replace junkparrot -10 3]
+TCL
+parrot
+OUT
+
+language_output_is("tcl",<<'TCL',<<OUT,"string replace, index bigger than 
string");
+    puts [string replace parrotjunk 6 20]
+TCL
+parrot
+OUT
+
+language_output_is("tcl",<<'TCL',<<OUT,"string replace, by something");
+    puts [string replace perl 1 3 arrot]
+TCL
+parrot
+OUT
+
+language_output_is("tcl",<<'TCL',<<OUT,"string replace, swapped indexes");
+    puts [string replace perl 3 1 arrot]
+TCL
+perl
+OUT
+
+
 language_output_is("tcl",<<'TCL',<<OUT,"string trimleft, bad args");
    string trimleft
 TCL
@@ -630,7 +667,6 @@
 abcfaoo
 OUT
 
-
 # XXX - many of the classes are NOT tested here, and we rely
 # on the cvs tests from tcl for that.
 
Index: languages/tcl/lib/commands/string.pir
===================================================================
--- languages/tcl/lib/commands/string.pir       (revision 10775)
+++ languages/tcl/lib/commands/string.pir       (working copy)
@@ -712,7 +712,58 @@
 
 bad_args:
   .throw('wrong # args: should be "string is class ?-strict? ?-failindex var? 
str"')
+.end
 
+                           
+.sub "replace"
+  .param pmc argv
+
+  .local int argc
+  .local int low
+  .local int high
+  .local int len
+  .local pmc retval
+
+  .local pmc string_index
+  string_index = find_global "_Tcl", "__string_index"
+
+  argc = argv
+  if argc > 4 goto bad_args
+  if argc < 3 goto bad_args
+  
+  $S1 = argv[0]
+  $S4 = ""
+         
+  $S2 = argv[1]
+  low = string_index($S2, $S1)
+
+  $S3 = argv[2]
+  high = string_index($S3, $S1)
+
+  if high < low goto replace_done
+
+  if low >= 0 goto low_ok
+  low = 0
+
+low_ok:
+  len = length $S1
+  if high <= len goto high_ok
+  high = len
+
+high_ok:        
+  if argc == 1 goto replace_do
+  $S4 = argv[3]
+
+replace_do:
+  len = high - low
+  len += 1
+  substr $S1, low, len, $S4         
+
+replace_done:   
+  .return($S1)
+
+bad_args:
+  .throw ("wrong # args: should be \"string replace string first last 
?string?\"")
 .end
 
          
@@ -834,3 +885,4 @@
 
 .end
          
+

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