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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.
 */
DECLARE_LHASH_OF(OBJ_NAME);
static LHASH_OF(OBJ_NAME) *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);

static IMPLEMENT_LHASH_HASH_FN(obj_name, OBJ_NAME)
static IMPLEMENT_LHASH_COMP_FN(obj_name, OBJ_NAME)

int OBJ_NAME_init(void)
      {
      if (names_lh != NULL) return(1);
      MemCheck_off();
      names_lh=lh_OBJ_NAME_new();
      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=lh_OBJ_NAME_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=lh_OBJ_NAME_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_OBJ_NAME_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=lh_OBJ_NAME_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);
      }

00262 struct doall
      {
      int type;
      void (*fn)(const OBJ_NAME *,void *arg);
      void *arg;
      };

static void do_all_fn_doall_arg(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_OBJ_NAME_doall_arg(names_lh, LHASH_DOALL_ARG_FN(do_all_fn),
                        struct doall, &d);
      }

00289 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_OBJ_NAME_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_doall(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=lh_OBJ_NAME_down_load(names_lh);
      lh_OBJ_NAME_down_load(names_lh)=0;

      lh_OBJ_NAME_doall(names_lh,LHASH_DOALL_FN(names_lh_free));
      if (type < 0)
            {
            lh_OBJ_NAME_free(names_lh);
            sk_NAME_FUNCS_pop_free(name_funcs_stack,name_funcs_free);
            names_lh=NULL;
            name_funcs_stack = NULL;
            }
      else
            lh_OBJ_NAME_down_load(names_lh)=down_load;
      }


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