1.1 --- a/src/share/vm/classfile/javaClasses.hpp Thu Mar 31 02:31:57 2011 -0700
1.2 +++ b/src/share/vm/classfile/javaClasses.hpp Thu Mar 31 14:00:41 2011 -0700
1.3 @@ -109,6 +109,30 @@
1.4 static char* as_platform_dependent_str(Handle java_string, TRAPS);
1.5 static jchar* as_unicode_string(oop java_string, int& length);
1.6
1.7 + // Compute the hash value for a java.lang.String object which would
1.8 + // contain the characters passed in. This hash value is used for at
1.9 + // least two purposes.
1.10 + //
1.11 + // (a) As the hash value used by the StringTable for bucket selection
1.12 + // and comparison (stored in the HashtableEntry structures). This
1.13 + // is used in the String.intern() method.
1.14 + //
1.15 + // (b) As the hash value used by the String object itself, in
1.16 + // String.hashCode(). This value is normally calculate in Java code
1.17 + // in the String.hashCode method(), but is precomputed for String
1.18 + // objects in the shared archive file.
1.19 + //
1.20 + // For this reason, THIS ALGORITHM MUST MATCH String.hashCode().
1.21 + static unsigned int hash_string(jchar* s, int len) {
1.22 + unsigned int h = 0;
1.23 + while (len-- > 0) {
1.24 + h = 31*h + (unsigned int) *s;
1.25 + s++;
1.26 + }
1.27 + return h;
1.28 + }
1.29 + static unsigned int hash_string(oop java_string);
1.30 +
1.31 static bool equals(oop java_string, jchar* chars, int len);
1.32
1.33 // Conversion between '.' and '/' formats
