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     LBER_TYPES(3)     OpenLDAP 2.2.23 (2005/01/24)	 LBER_TYPES(3)

     NAME
	  ber_int_t, ber_uint_t, ber_len_t, ber_slen_t, ber_tag_t,
	  struct berval, BerValue, BerVarray, BerElement, ber_bvfree,
	  ber_bvecfree, ber_bvecadd, ber_bvarray_free,
	  ber_bvarray_add, ber_bvdup, ber_dupbv, ber_bvstr,
	  ber_bvstrdup, ber_str2bv, ber_free - LBER types and
	  allocation functions

     LIBRARY
	  OpenLDAP LBER (liblber, -llber)

     SYNOPSIS
	  #include <lber.h>

	  typedef impl_tag_t ber_tag_t;
	  typedef impl_int_t ber_int_t;
	  typedef impl_uint_t ber_uint_t;
	  typedef impl_len_t ber_len_t;
	  typedef impl_slen_t ber_slen_t;

	  typedef struct berval {
	      ber_len_t bv_len;
	      char *bv_val;
	  } BerValue, *BerVarray;

	  typedef struct berelement BerElement;

	  void ber_bvfree(struct berval *bv);

	  void ber_bvecfree(struct berval **bvec);

	  void ber_bvecadd(struct berval ***bvec, struct berval *bv);

	  void ber_bvarray_free(struct berval *bvarray);

	  void ber_bvarray_add(BerVarray *bvarray, BerValue *bv);

	  struct berval *ber_bvdup(const struct berval *bv);

	  struct berval *ber_dupbv(const struct berval *dst, struct
	  berval *src);

	  struct berval *ber_bvstr(const char *str);

	  struct berval *ber_bvstrdup(const char *str);

	  struct berval *ber_str2bv(const char *str, ber_len_t len,
	  int dup

	  void ber_free(BerElement *ber, int freebuf);

     DESCRIPTION

     Page 1					     (printed 5/15/05)

     LBER_TYPES(3)     OpenLDAP 2.2.23 (2005/01/24)	 LBER_TYPES(3)

	  The following are the basic types and structures defined for
	  use with the Lightweight BER library.

	  ber_int_t is a signed integer of at least 32 bits.  It is
	  commonly equivalent to int.  ber_uint_t is the unsigned
	  variant of ber_int_t.

	  ber_len_t is an unsigned integer of at least 32 bits used to
	  represent a length. It is commonly equivalent to a size_t.
	  ber_slen_t is the signed variant to ber_len_t.

	  ber_tag_t is an unsigned integer of at least 32 bits used to
	  represent a BER tag.	It is commonly equivalent to a
	  unsigned long.

	  The actual definitions of the integral impl_TYPE_t types are
	  platform specific.

	  BerValue, commonly used as struct berval, is used to hold an
	  arbitrary sequence of octets.	 bv_val points to bv_len
	  octets.  bv_val is not necessarly terminated by a NUL (zero)
	  octet.  ber_bvfree() frees a BerValue, pointed to by bv,
	  returned from this API.  If bv is NULL, the routine does
	  nothing.

	  ber_bvecfree() frees an array of BerValues (and the array),
	  pointed to by bvec, returned from this API.  If bvec is
	  NULL, the routine does nothing.  ber_bvecadd() appends the
	  bv pointer to the bvec array.	 Space for the array is
	  allocated as needed.	The end of the array is marked by a
	  NULL pointer.

	  ber_bvarray_free() frees an array of BerValues (and the
	  array), pointed to by bvarray, returned from this API.  If
	  bvarray is NULL, the routine does nothing.
	  ber_bvarray_add() appends the contents of the BerValue
	  pointed to by bv to the bvarray array.  Space for the new
	  element is allocated as needed.  The end of the array is
	  marked by a BerValue with a NULL bv_val field.

	  ber_bvdup() returns a copy of a BerValue.  The routine
	  returns NULL upon error (e.g. out of memory).	 The caller
	  should use ber_bvfree() to deallocate the resulting
	  BerValue.  ber_dupbv() copies a BerValue from src to dst.
	  If dst is NULL a new BerValue will be allocated to hold the
	  copy.	 The routine returns NULL upon error, otherwise it
	  returns a pointer to the copy.  If dst is NULL the caller
	  should use ber_bvfree() to deallocate the resulting
	  BerValue, otherwise ber_memfree() should be used to
	  deallocate the dst->bv_val.  (The ber_bvdup() function is
	  internally implemented as ber_dupbv(NULL, bv).  ber_bvdup()
	  is provided only for compatibility with an expired draft of

     Page 2					     (printed 5/15/05)

     LBER_TYPES(3)     OpenLDAP 2.2.23 (2005/01/24)	 LBER_TYPES(3)

	  the LDAP C API; ber_dupbv() is the preferred interface.)

	  ber_bvstr() returns a BerValue containing the string pointed
	  to by str.  ber_bvstrdup() returns a BerValue containing a
	  copy of the string pointed to by str.	 ber_str2bv() returns
	  a BerValue containing the string pointed to by str, whose
	  length may be optionally specified in len.  If dup is non-
	  zero, the BerValue will contain a copy of str.  If len is
	  zero, the number of bytes to copy will be determined by
	  strlen(3), otherwise len bytes will be copied.  If bv is
	  non-NULL, the result will be stored in the given BerValue,
	  otherwise a new BerValue will be allocated to store the
	  result.  NOTE: Both ber_bvstr() and ber_bvstrdup() are
	  implemented as macros using ber_str2bv() in this version of
	  the library.

	  BerElement is an opaque structure used to maintain state
	  information used in encoding and decoding.  BerElement
	  structures are created using ber_alloc_t(3) and ber_init(3).
	  ber_free() frees a BerElement pointed to by ber.  If ber is
	  NULL, the routine does nothing.  If freebuf is zero, the
	  internal buffer is not freed.

     SEE ALSO
	  lber-encode(3), lber-decode(3), lber-memory(3)

     ACKNOWLEDGEMENTS
	  OpenLDAP is developed and maintained by The OpenLDAP Project
	  (http://www.openldap.org/).  OpenLDAP is derived from
	  University of Michigan LDAP 3.3 Release.

     Page 3					     (printed 5/15/05)

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