Hello,
Would it be possible to relicense hash-pjw under LGPLv2+ or v3+? It
is quite a useful function and I'd like to use it in gnutls and
libtasn1 (I could re-implement it but I'd like to avoid that if
possible). Also would it be possible to have a version that works with
non-null terminated strings? (patch attached).
A question on this function is why do you use char *s to describe
input and not unsigned char*? Given that h is unsigned anyway I don't
see the purpose for having s signed.
regards,
Nikos
diff --git a/lib/hash-pjw.c b/lib/hash-pjw.c
index 0966598..8ee7c27 100644
--- a/lib/hash-pjw.c
+++ b/lib/hash-pjw.c
@@ -38,3 +38,15 @@ hash_pjw (const void *x, size_t tablesize)
return h % tablesize;
}
+
+size_t
+hash_pjw_s (const void *x, size_t x_size, size_t tablesize)
+{
+ const unsigned char *s;
+ size_t i, h = 0;
+
+ for (i=0; i<x_size; i++)
+ h = s[i] + ((h << 9) | (h >> (SIZE_BITS - 9)));
+
+ return h % tablesize;
+}
diff --git a/lib/hash-pjw.h b/lib/hash-pjw.h
index 6404916..5d39877 100644
--- a/lib/hash-pjw.h
+++ b/lib/hash-pjw.h
@@ -21,3 +21,4 @@
The result is platform dependent: it depends on the size of the 'size_t'
type and on the signedness of the 'char' type. */
extern size_t hash_pjw (void const *x, size_t tablesize) _GL_ATTRIBUTE_PURE;
+extern size_t hash_pjw_s (void const *x, size_t x_size, size_t tablesize)
_GL_ATTRIBUTE_PURE;
