[js] Implement nqp::getstrfromname and nqp::codepointfromname.

Author: pmurias

src/vm/js/Operations.nqp

@@ -1597,6 +1597,9 @@ class QAST::OperationsJS {
 
     add_simple_op('sleep', $T_NUM, [$T_NUM], :side_effects);
 
+    add_simple_op('getstrfromname', $T_STR, [$T_STR]);
+    add_simple_op('codepointfromname', $T_INT, [$T_STR]);
+
     add_op('js', sub ($comp, $node, :$want) {
         my %want_char := nqp::hash($T_INT, 'I', $T_NUM, 'N', $T_STR, 'S', $T_VOID, 'v');
         my sub want($node, $type) {

src/vm/js/nqp-runtime/core.js

@@ -1003,6 +1003,16 @@ op.tclc = function(string) {
   return first + lower.toLowerCase();
 };
 
+op.getstrfromname = function(name) {
+  let unicharadata = require('unicharadata');
+  return unicharadata.lookup(name);
+};
+
+op.codepointfromname = function(name) {
+  let unicharadata = require('unicharadata');
+  return unicharadata.lookup(name).codePointAt(0);
+};
+
 op.islist = function(list) {
   return (list._STable && list._STable.REPR instanceof reprs.VMArray) ? 1 : 0;
 };