+#endif
+
+
+/* Define the predeclared (but externally opaque) "ERR_FNS" type */
+struct st_ERR_FNS
+ {
+ /* Works on the "error_hash" string table */
+ LHASH_OF(ERR_STRING_DATA) *(*cb_err_get)(int create);
+ void (*cb_err_del)(void);
+ ERR_STRING_DATA *(*cb_err_get_item)(const ERR_STRING_DATA *);
+ ERR_STRING_DATA *(*cb_err_set_item)(ERR_STRING_DATA *);
+ ERR_STRING_DATA *(*cb_err_del_item)(ERR_STRING_DATA *);
+ /* Works on the "thread_hash" error-state table */
+ LHASH_OF(ERR_STATE) *(*cb_thread_get)(int create);
+ void (*cb_thread_release)(LHASH_OF(ERR_STATE) **hash);
+ ERR_STATE *(*cb_thread_get_item)(const ERR_STATE *);
+ ERR_STATE *(*cb_thread_set_item)(ERR_STATE *);
+ void (*cb_thread_del_item)(const ERR_STATE *);
+ /* Returns the next available error "library" numbers */
+ int (*cb_get_next_lib)(void);
+ };
+
+/* Predeclarations of the "err_defaults" functions */
+static LHASH_OF(ERR_STRING_DATA) *int_err_get(int create);
+static void int_err_del(void);
+static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
+static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *);
+static ERR_STRING_DATA *int_err_del_item(ERR_STRING_DATA *);
+static LHASH_OF(ERR_STATE) *int_thread_get(int create);
+static void int_thread_release(LHASH_OF(ERR_STATE) **hash);
+static ERR_STATE *int_thread_get_item(const ERR_STATE *);
+static ERR_STATE *int_thread_set_item(ERR_STATE *);
+static void int_thread_del_item(const ERR_STATE *);
+static int int_err_get_next_lib(void);
+/* The static ERR_FNS table using these defaults functions */
+static const ERR_FNS err_defaults =
+ {
+ int_err_get,
+ int_err_del,
+ int_err_get_item,
+ int_err_set_item,
+ int_err_del_item,
+ int_thread_get,
+ int_thread_release,
+ int_thread_get_item,
+ int_thread_set_item,
+ int_thread_del_item,
+ int_err_get_next_lib
+ };
+
+/* The replacable table of ERR_FNS functions we use at run-time */
+static const ERR_FNS *err_fns = NULL;
+
+/* Eg. rather than using "err_get()", use "ERRFN(err_get)()". */
+#define ERRFN(a) err_fns->cb_##a
+
+/* The internal state used by "err_defaults" - as such, the setting, reading,
+ * creating, and deleting of this data should only be permitted via the
+ * "err_defaults" functions. This way, a linked module can completely defer all
+ * ERR state operation (together with requisite locking) to the implementations
+ * and state in the loading application. */
+static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
+static LHASH_OF(ERR_STATE) *int_thread_hash = NULL;
+static int int_thread_hash_references = 0;
+static int int_err_library_number= ERR_LIB_USER;
+
+/* Internal function that checks whether "err_fns" is set and if not, sets it to
+ * the defaults. */
+static void err_fns_check(void)
+ {
+ if (err_fns) return;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if (!err_fns)
+ err_fns = &err_defaults;
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ }
+
+/* API functions to get or set the underlying ERR functions. */
+
+const ERR_FNS *ERR_get_implementation(void)
+ {
+ err_fns_check();
+ return err_fns;
+ }
+
+int ERR_set_implementation(const ERR_FNS *fns)
+ {
+ int ret = 0;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ /* It's too late if 'err_fns' is non-NULL. BTW: not much point setting
+ * an error is there?! */
+ if (!err_fns)
+ {
+ err_fns = fns;
+ ret = 1;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ return ret;
+ }
+
+/* These are the callbacks provided to "lh_new()" when creating the LHASH tables
+ * internal to the "err_defaults" implementation. */
+
+static unsigned long get_error_values(int inc,int top,const char **file,int *line,
+ const char **data,int *flags);
+
+/* The internal functions used in the "err_defaults" implementation */
+
+static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
+ {
+ unsigned long ret,l;
+
+ l=a->error;
+ ret=l^ERR_GET_LIB(l)^ERR_GET_FUNC(l);
+ return(ret^ret%19*13);
+ }
+static IMPLEMENT_LHASH_HASH_FN(err_string_data, ERR_STRING_DATA)
+
+static int err_string_data_cmp(const ERR_STRING_DATA *a,
+ const ERR_STRING_DATA *b)
+ {
+ return (int)(a->error - b->error);
+ }
+static IMPLEMENT_LHASH_COMP_FN(err_string_data, ERR_STRING_DATA)
+
+static LHASH_OF(ERR_STRING_DATA) *int_err_get(int create)
+ {
+ LHASH_OF(ERR_STRING_DATA) *ret = NULL;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if (!int_error_hash && create)
+ {
+ CRYPTO_push_info("int_err_get (err.c)");
+ int_error_hash = lh_ERR_STRING_DATA_new();
+ CRYPTO_pop_info();
+ }
+ if (int_error_hash)
+ ret = int_error_hash;
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+
+ return ret;
+ }
+
+static void int_err_del(void)
+ {
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if (int_error_hash)
+ {
+ lh_ERR_STRING_DATA_free(int_error_hash);
+ int_error_hash = NULL;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ }
+
+static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
+ {
+ ERR_STRING_DATA *p;
+ LHASH_OF(ERR_STRING_DATA) *hash;
+
+ err_fns_check();
+ hash = ERRFN(err_get)(0);
+ if (!hash)
+ return NULL;
+
+ CRYPTO_r_lock(CRYPTO_LOCK_ERR);
+ p = lh_ERR_STRING_DATA_retrieve(hash, d);
+ CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
+
+ return p;
+ }
+
+static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *d)
+ {
+ ERR_STRING_DATA *p;
+ LHASH_OF(ERR_STRING_DATA) *hash;
+
+ err_fns_check();
+ hash = ERRFN(err_get)(1);
+ if (!hash)
+ return NULL;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ p = lh_ERR_STRING_DATA_insert(hash, d);
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+
+ return p;
+ }
+
+static ERR_STRING_DATA *int_err_del_item(ERR_STRING_DATA *d)
+ {
+ ERR_STRING_DATA *p;
+ LHASH_OF(ERR_STRING_DATA) *hash;
+
+ err_fns_check();
+ hash = ERRFN(err_get)(0);
+ if (!hash)
+ return NULL;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ p = lh_ERR_STRING_DATA_delete(hash, d);
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+
+ return p;
+ }
+
+static unsigned long err_state_hash(const ERR_STATE *a)
+ {
+ return CRYPTO_THREADID_hash(&a->tid) * 13;
+ }
+static IMPLEMENT_LHASH_HASH_FN(err_state, ERR_STATE)
+
+static int err_state_cmp(const ERR_STATE *a, const ERR_STATE *b)
+ {
+ return CRYPTO_THREADID_cmp(&a->tid, &b->tid);
+ }
+static IMPLEMENT_LHASH_COMP_FN(err_state, ERR_STATE)
+
+static LHASH_OF(ERR_STATE) *int_thread_get(int create)
+ {
+ LHASH_OF(ERR_STATE) *ret = NULL;
+
+ CRYPTO_w_lock(CRYPTO_LOCK_ERR);
+ if (!int_thread_hash && create)
+ {
+ CRYPTO_push_info("int_thread_get (err.c)");
+ int_thread_hash = lh_ERR_STATE_new();
+ CRYPTO_pop_info();
+ }
+ if (int_thread_hash)
+ {
+ int_thread_hash_references++;
+ ret = int_thread_hash;
+ }
+ CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
+ return ret;
+ }
+
+static void int_thread_release(LHASH_OF(ERR_STATE) **hash)
+ {
+ int i;
+
+ if (hash == NULL || *hash == NULL)
+ return;
+
+ i = CRYPTO_add(&int_thread_hash_references, -1, CRYPTO_LOCK_ERR);
+
+#ifdef REF_PRINT
+ fprintf(stderr,"%4d:%s\n",int_thread_hash_references,"ERR");
+#endif
+ if (i > 0) return;
+#ifdef REF_CHECK
+ if (i < 0)
+ {
+ fprintf(stderr,"int_thread_release, bad reference count\n");
+ abort(); /* ok */
+ }
+#endif
+ *hash = NULL;
+ }
+
+static ERR_STATE *int_thread_get_item(const ERR_STATE *d)
+ {
+ ERR_STATE *p;
+ LHASH_OF(ERR_STATE) *hash;
+
+ err_fns_check();
+ hash = ERRFN(thread_get)(0);
+ if (!hash)
+ return NULL;
+
+ CRYPTO_r_lock(CRYPTO_LOCK_ERR);
+ p = lh_ERR_STATE_retrieve(hash, d);
+ CRYPTO_r_unlock(CRYPTO_LOCK_ERR);