1 files changed, 71 insertions, 21 deletions

diff --git a/src/lib/libcrypto/lhash/lhash.h b/src/lib/libcrypto/lhash/lhash.h
index b8ff021906..dee8207333 100644
--- a/src/lib/libcrypto/lhash/lhash.h
+++ b/src/lib/libcrypto/lhash/lhash.h
@@ -63,11 +63,11 @@
 #ifndef HEADER_LHASH_H
 #define HEADER_LHASH_H
 
-#ifndef NO_FP_API
+#ifndef OPENSSL_NO_FP_API
 #include <stdio.h>
 #endif
 
-#ifndef NO_BIO
+#ifndef OPENSSL_NO_BIO
 #include <openssl/bio.h>
 #endif
 
@@ -77,18 +77,68 @@ extern "C" {
 
 typedef struct lhash_node_st
         {
-        void *data;
+        const void *data;
         struct lhash_node_st *next;
-#ifndef NO_HASH_COMP
+#ifndef OPENSSL_NO_HASH_COMP
         unsigned long hash;
 #endif
         } LHASH_NODE;
 
+typedef int (*LHASH_COMP_FN_TYPE)(const void *, const void *);
+typedef unsigned long (*LHASH_HASH_FN_TYPE)(const void *);
+typedef void (*LHASH_DOALL_FN_TYPE)(const void *);
+typedef void (*LHASH_DOALL_ARG_FN_TYPE)(const void *, void *);
+
+/* Macros for declaring and implementing type-safe wrappers for LHASH callbacks.
+ * This way, callbacks can be provided to LHASH structures without function
+ * pointer casting and the macro-defined callbacks provide per-variable casting
+ * before deferring to the underlying type-specific callbacks. NB: It is
+ * possible to place a "static" in front of both the DECLARE and IMPLEMENT
+ * macros if the functions are strictly internal. */
+
+/* First: "hash" functions */
+#define DECLARE_LHASH_HASH_FN(f_name,o_type) \
+        unsigned long f_name##_LHASH_HASH(const void *);
+#define IMPLEMENT_LHASH_HASH_FN(f_name,o_type) \
+        unsigned long f_name##_LHASH_HASH(const void *arg) { \
+                o_type a = (o_type)arg; \
+                return f_name(a); }
+#define LHASH_HASH_FN(f_name) f_name##_LHASH_HASH
+
+/* Second: "compare" functions */
+#define DECLARE_LHASH_COMP_FN(f_name,o_type) \
+        int f_name##_LHASH_COMP(const void *, const void *);
+#define IMPLEMENT_LHASH_COMP_FN(f_name,o_type) \
+        int f_name##_LHASH_COMP(const void *arg1, const void *arg2) { \
+                o_type a = (o_type)arg1; \
+                o_type b = (o_type)arg2; \
+                return f_name(a,b); }
+#define LHASH_COMP_FN(f_name) f_name##_LHASH_COMP
+
+/* Third: "doall" functions */
+#define DECLARE_LHASH_DOALL_FN(f_name,o_type) \
+        void f_name##_LHASH_DOALL(const void *);
+#define IMPLEMENT_LHASH_DOALL_FN(f_name,o_type) \
+        void f_name##_LHASH_DOALL(const void *arg) { \
+                o_type a = (o_type)arg; \
+                f_name(a); }
+#define LHASH_DOALL_FN(f_name) f_name##_LHASH_DOALL
+
+/* Fourth: "doall_arg" functions */
+#define DECLARE_LHASH_DOALL_ARG_FN(f_name,o_type,a_type) \
+        void f_name##_LHASH_DOALL_ARG(const void *, void *);
+#define IMPLEMENT_LHASH_DOALL_ARG_FN(f_name,o_type,a_type) \
+        void f_name##_LHASH_DOALL_ARG(const void *arg1, void *arg2) { \
+                o_type a = (o_type)arg1; \
+                a_type b = (a_type)arg2; \
+                f_name(a,b); }
+#define LHASH_DOALL_ARG_FN(f_name) f_name##_LHASH_DOALL_ARG
+
 typedef struct lhash_st
         {
         LHASH_NODE **b;
-        int (*comp)();
-        unsigned long (*hash)();
+        LHASH_COMP_FN_TYPE comp;
+        LHASH_HASH_FN_TYPE hash;
         unsigned int num_nodes;
         unsigned int num_alloc_nodes;
         unsigned int p;
@@ -120,26 +170,26 @@ typedef struct lhash_st
  * in lh_insert(). */
 #define lh_error(lh)    ((lh)->error)
 
-LHASH *lh_new(unsigned long (*h)(/* void *a */), int (*c)(/* void *a,void *b */));
+LHASH *lh_new(LHASH_HASH_FN_TYPE h, LHASH_COMP_FN_TYPE c);
 void lh_free(LHASH *lh);
-void *lh_insert(LHASH *lh, void *data);
-void *lh_delete(LHASH *lh, void *data);
-void *lh_retrieve(LHASH *lh, void *data);
-    void lh_doall(LHASH *lh, void (*func)(/*void *b*/));
-void lh_doall_arg(LHASH *lh, void (*func)(/*void *a,void *b*/),void *arg);
+void *lh_insert(LHASH *lh, const void *data);
+void *lh_delete(LHASH *lh, const void *data);
+void *lh_retrieve(LHASH *lh, const void *data);
+void lh_doall(LHASH *lh, LHASH_DOALL_FN_TYPE func);
+void lh_doall_arg(LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, void *arg);
 unsigned long lh_strhash(const char *c);
-unsigned long lh_num_items(LHASH *lh);
+unsigned long lh_num_items(const LHASH *lh);
 
-#ifndef NO_FP_API
-void lh_stats(LHASH *lh, FILE *out);
-void lh_node_stats(LHASH *lh, FILE *out);
-void lh_node_usage_stats(LHASH *lh, FILE *out);
+#ifndef OPENSSL_NO_FP_API
+void lh_stats(const LHASH *lh, FILE *out);
+void lh_node_stats(const LHASH *lh, FILE *out);
+void lh_node_usage_stats(const LHASH *lh, FILE *out);
 #endif
 
-#ifndef NO_BIO
-void lh_stats_bio(LHASH *lh, BIO *out);
-void lh_node_stats_bio(LHASH *lh, BIO *out);
-void lh_node_usage_stats_bio(LHASH *lh, BIO *out);
+#ifndef OPENSSL_NO_BIO
+void lh_stats_bio(const LHASH *lh, BIO *out);
+void lh_node_stats_bio(const LHASH *lh, BIO *out);
+void lh_node_usage_stats_bio(const LHASH *lh, BIO *out);
 #endif
 #ifdef  __cplusplus
 }