Added predefined strings hash.

Introduced vm->shared->cnst_hash, populated by
njs_value_t for all predefined strings.

Author: VadimZhestikov

auto/sources

@@ -19,6 +19,7 @@ NJS_LIB_SRCS=" \
    src/njs_utils.c \
    src/njs_chb.c \
    src/njs_value.c \
+   src/njs_predefined.c \
    src/njs_vm.c \
    src/njs_vmcode.c \
    src/njs_lexer.c \

src/njs_builtin.c

@@ -129,6 +129,11 @@ njs_builtin_objects_create(njs_vm_t *vm)
     njs_lvlhsh_init(&shared->keywords_hash);
     njs_lvlhsh_init(&shared->values_hash);
 
+    ret = njs_predefined_hash_init(&shared->predefined_hash);
+    if (njs_slow_path(ret != NJS_OK)) {
+        return NJS_ERROR;
+    }
+
     pattern = njs_regexp_pattern_create(vm, (u_char *) "(?:)",
                                         njs_length("(?:)"), 0);
     if (njs_slow_path(pattern == NULL)) {

src/njs_main.h

@@ -41,6 +41,7 @@
 
 #include <njs.h>
 #include <njs_value.h>
+#include <njs_predefined.h>
 
 #include <njs_vm.h>
 #include <njs_object_prop_declare.h>