ref: 1069d018c99fc394597f08f8f737a1e5ddb5179e
dir: /sys/src/ape/lib/openssl/crypto/objects/o_names.c/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/objects.h>
#include <openssl/safestack.h>
#include <openssl/e_os2.h>
/* Later versions of DEC C has started to add lnkage information to certain
* functions, which makes it tricky to use them as values to regular function
* pointers. One way is to define a macro that takes care of casting them
* correctly.
*/
#ifdef OPENSSL_SYS_VMS_DECC
# define OPENSSL_strcmp (int (*)(const char *,const char *))strcmp
#else
# define OPENSSL_strcmp strcmp
#endif
/* 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;
typedef struct name_funcs_st
{
unsigned long (*hash_func)(const char *name);
int (*cmp_func)(const char *a,const char *b);
void (*free_func)(const char *, int, const char *);
} NAME_FUNCS;
DECLARE_STACK_OF(NAME_FUNCS)
IMPLEMENT_STACK_OF(NAME_FUNCS)
static STACK_OF(NAME_FUNCS) *name_funcs_stack;
/* The LHASH callbacks now use the raw "void *" prototypes and do per-variable
* casting in the functions. This prevents function pointer casting without the
* need for macro-generated wrapper functions. */
/* static unsigned long obj_name_hash(OBJ_NAME *a); */
static unsigned long obj_name_hash(const void *a_void);
/* static int obj_name_cmp(OBJ_NAME *a,OBJ_NAME *b); */
static int obj_name_cmp(const void *a_void,const void *b_void);
int OBJ_NAME_init(void)
{
if (names_lh != NULL) return(1);
MemCheck_off();
names_lh=lh_new(obj_name_hash, obj_name_cmp);
MemCheck_on();
return(names_lh != NULL);
}
int OBJ_NAME_new_index(unsigned long (*hash_func)(const char *),
int (*cmp_func)(const char *, const char *),
void (*free_func)(const char *, int, const char *))
{
int ret;
int i;
NAME_FUNCS *name_funcs;
if (name_funcs_stack == NULL)
{
MemCheck_off();
name_funcs_stack=sk_NAME_FUNCS_new_null();
MemCheck_on();
}
if ((name_funcs_stack == NULL))
{
/* ERROR */
return(0);
}
ret=names_type_num;
names_type_num++;
for (i=sk_NAME_FUNCS_num(name_funcs_stack); i<names_type_num; i++)
{
MemCheck_off();
name_funcs = OPENSSL_malloc(sizeof(NAME_FUNCS));
MemCheck_on();
if (!name_funcs)
{
OBJerr(OBJ_F_OBJ_NAME_NEW_INDEX,ERR_R_MALLOC_FAILURE);
return(0);
}
name_funcs->hash_func = lh_strhash;
name_funcs->cmp_func = OPENSSL_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*/
MemCheck_off();
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)
name_funcs->hash_func = hash_func;
if (cmp_func != NULL)
name_funcs->cmp_func = cmp_func;
if (free_func != NULL)
name_funcs->free_func = free_func;
return(ret);
}
/* static int obj_name_cmp(OBJ_NAME *a, OBJ_NAME *b) */
static int obj_name_cmp(const void *a_void, const void *b_void)
{
int ret;
const OBJ_NAME *a = (const OBJ_NAME *)a_void;
const OBJ_NAME *b = (const OBJ_NAME *)b_void;
ret=a->type-b->type;
if (ret == 0)
{
if ((name_funcs_stack != NULL)
&& (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
{
ret=sk_NAME_FUNCS_value(name_funcs_stack,
a->type)->cmp_func(a->name,b->name);
}
else
ret=strcmp(a->name,b->name);
}
return(ret);
}
/* static unsigned long obj_name_hash(OBJ_NAME *a) */
static unsigned long obj_name_hash(const void *a_void)
{
unsigned long ret;
const OBJ_NAME *a = (const OBJ_NAME *)a_void;
if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > a->type))
{
ret=sk_NAME_FUNCS_value(name_funcs_stack,
a->type)->hash_func(a->name);
}
else
{
ret=lh_strhash(a->name);
}
ret^=a->type;
return(ret);
}
const char *OBJ_NAME_get(const char *name, int type)
{
OBJ_NAME on,*ret;
int num=0,alias;
if (name == NULL) return(NULL);
if ((names_lh == NULL) && !OBJ_NAME_init()) return(NULL);
alias=type&OBJ_NAME_ALIAS;
type&= ~OBJ_NAME_ALIAS;
on.name=name;
on.type=type;
for (;;)
{
ret=(OBJ_NAME *)lh_retrieve(names_lh,&on);
if (ret == NULL) return(NULL);
if ((ret->alias) && !alias)
{
if (++num > 10) return(NULL);
on.name=ret->data;
}
else
{
return(ret->data);
}
}
}
int OBJ_NAME_add(const char *name, int type, const char *data)
{
OBJ_NAME *onp,*ret;
int alias;
if ((names_lh == NULL) && !OBJ_NAME_init()) return(0);
alias=type&OBJ_NAME_ALIAS;
type&= ~OBJ_NAME_ALIAS;
onp=(OBJ_NAME *)OPENSSL_malloc(sizeof(OBJ_NAME));
if (onp == NULL)
{
/* ERROR */
return(0);
}
onp->name=name;
onp->alias=alias;
onp->type=type;
onp->data=data;
ret=(OBJ_NAME *)lh_insert(names_lh,onp);
if (ret != NULL)
{
/* free things */
if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
{
/* 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);
}
OPENSSL_free(ret);
}
else
{
if (lh_error(names_lh))
{
/* ERROR */
return(0);
}
}
return(1);
}
int OBJ_NAME_remove(const char *name, int type)
{
OBJ_NAME on,*ret;
if (names_lh == NULL) return(0);
type&= ~OBJ_NAME_ALIAS;
on.name=name;
on.type=type;
ret=(OBJ_NAME *)lh_delete(names_lh,&on);
if (ret != NULL)
{
/* free things */
if ((name_funcs_stack != NULL) && (sk_NAME_FUNCS_num(name_funcs_stack) > ret->type))
{
/* 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);
}
OPENSSL_free(ret);
return(1);
}
else
return(0);
}
struct doall
{
int type;
void (*fn)(const OBJ_NAME *,void *arg);
void *arg;
};
static void do_all_fn(const OBJ_NAME *name,struct doall *d)
{
if(name->type == d->type)
d->fn(name,d->arg);
}
static IMPLEMENT_LHASH_DOALL_ARG_FN(do_all_fn, const OBJ_NAME *, struct doall *)
void OBJ_NAME_do_all(int type,void (*fn)(const OBJ_NAME *,void *arg),void *arg)
{
struct doall d;
d.type=type;
d.fn=fn;
d.arg=arg;
lh_doall_arg(names_lh,LHASH_DOALL_ARG_FN(do_all_fn),&d);
}
struct doall_sorted
{
int type;
int n;
const OBJ_NAME **names;
};
static void do_all_sorted_fn(const OBJ_NAME *name,void *d_)
{
struct doall_sorted *d=d_;
if(name->type != d->type)
return;
d->names[d->n++]=name;
}
static int do_all_sorted_cmp(const void *n1_,const void *n2_)
{
const OBJ_NAME * const *n1=n1_;
const OBJ_NAME * const *n2=n2_;
return strcmp((*n1)->name,(*n2)->name);
}
void OBJ_NAME_do_all_sorted(int type,void (*fn)(const OBJ_NAME *,void *arg),
void *arg)
{
struct doall_sorted d;
int n;
d.type=type;
d.names=OPENSSL_malloc(lh_num_items(names_lh)*sizeof *d.names);
d.n=0;
OBJ_NAME_do_all(type,do_all_sorted_fn,&d);
qsort((void *)d.names,d.n,sizeof *d.names,do_all_sorted_cmp);
for(n=0 ; n < d.n ; ++n)
fn(d.names[n],arg);
OPENSSL_free((void *)d.names);
}
static int free_type;
static void names_lh_free(OBJ_NAME *onp)
{
if(onp == NULL)
return;
if ((free_type < 0) || (free_type == onp->type))
{
OBJ_NAME_remove(onp->name,onp->type);
}
}
static IMPLEMENT_LHASH_DOALL_FN(names_lh_free, OBJ_NAME *)
static void name_funcs_free(NAME_FUNCS *ptr)
{
OPENSSL_free(ptr);
}
void OBJ_NAME_cleanup(int type)
{
unsigned long down_load;
if (names_lh == NULL) return;
free_type=type;
down_load=names_lh->down_load;
names_lh->down_load=0;
lh_doall(names_lh,LHASH_DOALL_FN(names_lh_free));
if (type < 0)
{
lh_free(names_lh);
sk_NAME_FUNCS_pop_free(name_funcs_stack,name_funcs_free);
names_lh=NULL;
name_funcs_stack = NULL;
}
else
names_lh->down_load=down_load;
}