Reimplement so only one synchronous stack is used. The benefit is
authorRichard Levitte <levitte@openssl.org>
Sat, 29 Jan 2000 01:22:03 +0000 (01:22 +0000)
committerRichard Levitte <levitte@openssl.org>
Sat, 29 Jan 2000 01:22:03 +0000 (01:22 +0000)
that function pointers are nicely tucker in their structure.

crypto/objects/o_names.c

index e4ef2b0..e8aa7da 100644 (file)
@@ -4,45 +4,25 @@
 
 #include <openssl/lhash.h>
 #include <openssl/objects.h>
-
-union cmp_fn_to_char_u
-       {
-       char *char_p;
-       int (*fn_p)(const char *, const char *);
-       };
-
-union hash_fn_to_char_u
-       {
-       char *char_p;
-       unsigned long (*fn_p)(const char *);
-       };
-
-union int_fn_to_char_u
-       {
-       char *char_p;
-       int (*fn_p)();
-       };
-
-union ulong_fn_to_char_u
-       {
-       char *char_p;
-       unsigned long (*fn_p)();
-       };
-
-union void_fn_to_char_u
-       {
-       char *char_p;
-       void (*fn_p)();
-       };
+#include <openssl/safestack.h>
 
 /* I use the ex_data stuff to manage the identifiers for the obj_name_types
  * that applications may define.  I only really use the free function field.
  */
 static LHASH *names_lh=NULL;
 static int names_type_num=OBJ_NAME_TYPE_NUM;
-static STACK *names_cmp=NULL;
-static STACK *names_hash=NULL;
-static STACK *names_free=NULL;
+
+typedef struct name_funcs_st
+       {
+       unsigned long (*hash_func)();
+       int (*cmp_func)();
+       void (*free_func)();
+       } NAME_FUNCS;
+
+DECLARE_STACK_OF(NAME_FUNCS)
+IMPLEMENT_STACK_OF(NAME_FUNCS)
+
+STACK_OF(NAME_FUNCS) *name_funcs_stack;
 
 static unsigned long obj_name_hash(OBJ_NAME *a);
 static int obj_name_cmp(OBJ_NAME *a,OBJ_NAME *b);
@@ -61,62 +41,57 @@ int OBJ_NAME_new_index(unsigned long (*hash_func)(), int (*cmp_func)(),
        {
        int ret;
        int i;
-       union ulong_fn_to_char_u tmp_hash_func;
-       union int_fn_to_char_u tmp_cmp_func;
-       union void_fn_to_char_u tmp_free_func;
-       union cmp_fn_to_char_u tmp_strcmp;
-       union hash_fn_to_char_u tmp_lh_strhash;
-
-       tmp_hash_func.fn_p = hash_func;
-       tmp_cmp_func.fn_p = cmp_func;
-       tmp_free_func.fn_p = free_func;
-       tmp_strcmp.fn_p = (int (*)(const char *, const char *))strcmp;
-       tmp_lh_strhash.fn_p = lh_strhash;
-
-       if (names_free == NULL)
+       NAME_FUNCS *name_funcs;
+
+       if (name_funcs_stack == NULL)
                {
                MemCheck_off();
-               names_hash=sk_new_null();
-               names_cmp=sk_new_null();
-               names_free=sk_new_null();
+               name_funcs_stack=sk_NAME_FUNCS_new_null();
                MemCheck_on();
                }
-       if ((names_free == NULL) || (names_hash == NULL) || (names_cmp == NULL))
+       if ((name_funcs_stack == NULL))
                {
                /* ERROR */
                return(0);
                }
        ret=names_type_num;
        names_type_num++;
-       for (i=sk_num(names_free); i<names_type_num; i++)
+       for (i=sk_NAME_FUNCS_num(name_funcs_stack); i<names_type_num; i++)
                {
                MemCheck_off();
-               sk_push(names_hash,tmp_strcmp.char_p);
-               sk_push(names_cmp,tmp_lh_strhash.char_p);
-               sk_push(names_free,NULL);
+               name_funcs = Malloc(sizeof(NAME_FUNCS));
+               name_funcs->hash_func = lh_strhash;
+               name_funcs->cmp_func = strcmp;
+               name_funcs->free_func = 0; /* NULL is often declared to
+                                           * ((void *)0), which according
+                                           * to Compaq C is not really
+                                           * compatible with a function
+                                           * pointer.  -- Richard Levitte*/
+               sk_NAME_FUNCS_push(name_funcs_stack,name_funcs);
                MemCheck_on();
                }
+       name_funcs = sk_NAME_FUNCS_value(name_funcs_stack, ret);
        if (hash_func != NULL)
-               sk_set(names_hash,ret,tmp_hash_func.char_p);
+               name_funcs->hash_func = hash_func;
        if (cmp_func != NULL)
-               sk_set(names_cmp,ret,tmp_cmp_func.char_p);
+               name_funcs->cmp_func = cmp_func;
        if (free_func != NULL)
-               sk_set(names_free,ret,tmp_free_func.char_p);
+               name_funcs->free_func = free_func;
        return(ret);
        }
 
 static int obj_name_cmp(OBJ_NAME *a, OBJ_NAME *b)
        {
        int ret;
-       union int_fn_to_char_u cmp;
 
        ret=a->type-b->type;
        if (ret == 0)
                {
-               if ((names_cmp != NULL) && (sk_num(names_cmp) > a->type))
+               if ((name_funcs_stack != NULL)
+                       && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
                        {
-                       cmp.char_p=sk_value(names_cmp,a->type);
-                       ret=cmp.fn_p(a->name,b->name);
+                       ret=sk_NAME_FUNCS_value(name_funcs_stack,a->type)
+                               ->cmp_func(a->name,b->name);
                        }
                else
                        ret=strcmp(a->name,b->name);
@@ -127,12 +102,11 @@ static int obj_name_cmp(OBJ_NAME *a, OBJ_NAME *b)
 static unsigned long obj_name_hash(OBJ_NAME *a)
        {
        unsigned long ret;
-       union ulong_fn_to_char_u hash;
 
-       if ((names_hash != NULL) && (sk_num(names_hash) > a->type))
+       if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
                {
-               hash.char_p=sk_value(names_hash,a->type);
-               ret=hash.fn_p(a->name);
+               ret=sk_NAME_FUNCS_value(name_funcs_stack,a->type)
+                       ->hash_func(a->name);
                }
        else
                {
@@ -174,7 +148,6 @@ const char *OBJ_NAME_get(const char *name, int type)
 
 int OBJ_NAME_add(const char *name, int type, const char *data)
        {
-       union void_fn_to_char_u f;
        OBJ_NAME *onp,*ret;
        int alias;
 
@@ -199,10 +172,14 @@ int OBJ_NAME_add(const char *name, int type, const char *data)
        if (ret != NULL)
                {
                /* free things */
-               if ((names_free != NULL) && (sk_num(names_free) > ret->type))
+               if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
                        {
-                       f.char_p=sk_value(names_free,ret->type);
-                       f.fn_p(ret->name,ret->type,ret->data);
+                       /* XXX: I'm not sure I understand why the free
+                        * function should get three arguments...
+                        * -- Richard Levitte
+                        */
+                       sk_NAME_FUNCS_value(name_funcs_stack,ret->type)
+                               ->free_func(ret->name,ret->type,ret->data);
                        }
                Free((char *)ret);
                }
@@ -220,7 +197,6 @@ int OBJ_NAME_add(const char *name, int type, const char *data)
 int OBJ_NAME_remove(const char *name, int type)
        {
        OBJ_NAME on,*ret;
-       union void_fn_to_char_u f;
 
        if (names_lh == NULL) return(0);
 
@@ -231,10 +207,14 @@ int OBJ_NAME_remove(const char *name, int type)
        if (ret != NULL)
                {
                /* free things */
-               if ((names_free != NULL) && (sk_num(names_free) > type))
+               if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
                        {
-                       f.char_p=sk_value(names_free,type);
-                       f.fn_p(ret->name,ret->type,ret->data);
+                       /* XXX: I'm not sure I understand why the free
+                        * function should get three arguments...
+                        * -- Richard Levitte
+                        */
+                       sk_NAME_FUNCS_value(name_funcs_stack,ret->type)
+                               ->free_func(ret->name,ret->type,ret->data);
                        }
                Free((char *)ret);
                return(1);
@@ -256,6 +236,11 @@ static void names_lh_free(OBJ_NAME *onp, int type)
                }
        }
 
+static void name_funcs_free(NAME_FUNCS *ptr)
+       {
+       Free(ptr);
+       }
+
 void OBJ_NAME_cleanup(int type)
        {
        unsigned long down_load;
@@ -270,13 +255,9 @@ void OBJ_NAME_cleanup(int type)
        if (type < 0)
                {
                lh_free(names_lh);
-               sk_free(names_hash);
-               sk_free(names_cmp);
-               sk_free(names_free);
+               sk_NAME_FUNCS_pop_free(name_funcs_stack,name_funcs_free);
                names_lh=NULL;
-               names_hash=NULL;
-               names_cmp=NULL;
-               names_free=NULL;
+               name_funcs_stack = NULL;
                }
        else
                names_lh->down_load=down_load;