ber_bvdup(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  func-
       tions

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,
       struct berval *bv);

       void ber_free(BerElement *ber, int freebuf);

DESCRIPTION

       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  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.

OpenLDAP 2.2.30                   2005/11/18                     LBER_TYPES(3)