ber_bvstrdup

LBER_TYPES(3)							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 alloca-
       tion 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,
       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_mem-
       free() 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 2.2.13			  2004/06/10			LBER_TYPES(3)