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ber_dupbv.3
.lf 1 stdin .TH LBER_TYPES 3 "2018/03/22" "OpenLDAP 2.4.46" .\" $OpenLDAP$ .\" Copyright 1998-2018 The OpenLDAP Foundation All Rights Reserved. .\" Copying restrictions apply. See COPYRIGHT/LICENSE. .SH 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_alloc_t, ber_init, ber_init2, ber_free \- OpenLDAP LBER types and allocation functions .SH LIBRARY OpenLDAP LBER (liblber, \-llber) .SH SYNOPSIS .B #include <lber.h> .LP .nf .ft B 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; .ft .fi .LP .BI "void ber_bvfree(struct berval *" bv ");" .LP .BI "void ber_bvecfree(struct berval **" bvec ");" .LP .BI "void ber_bvecadd(struct berval ***" bvec ", struct berval *" bv ");" .LP .BI "void ber_bvarray_free(struct berval *" bvarray ");" .LP .BI "void ber_bvarray_add(BerVarray *" bvarray ", BerValue *" bv ");" .LP .BI "struct berval *ber_bvdup(const struct berval *" bv ");" .LP .BI "struct berval *ber_dupbv(const struct berval *" dst ", struct berval *" src ");" .LP .BI "struct berval *ber_bvstr(const char *" str ");" .LP .BI "struct berval *ber_bvstrdup(const char *" str ");" .LP .BI "struct berval *ber_str2bv(const char *" str ", ber_len_t " len ", int " dup ", struct berval *" bv ");" .LP .BI "BerElement *ber_alloc_t(int " options ");" .LP .BI "BerElement *ber_init(struct berval *" bv ");" .LP .BI "void ber_init2(BerElement *" ber ", struct berval *" bv ", int " options ");" .LP .BI "void ber_free(BerElement *" ber ", int " freebuf ");" .SH DESCRIPTION .LP The following are the basic types and structures defined for use with the Lightweight BER library. .LP .B ber_int_t is a signed integer of at least 32 bits. It is commonly equivalent to .BR int . .B ber_uint_t is the unsigned variant of .BR ber_int_t . .LP .B ber_len_t is an unsigned integer of at least 32 bits used to represent a length. It is commonly equivalent to a .BR size_t . .B ber_slen_t is the signed variant to .BR ber_len_t . .LP .B ber_tag_t is an unsigned integer of at least 32 bits used to represent a BER tag. It is commonly equivalent to a .BR unsigned\ long . .LP The actual definitions of the integral impl_TYPE_t types are platform specific. .LP .BR BerValue , commonly used as .BR struct\ berval , is used to hold an arbitrary sequence of octets. .B bv_val points to .B bv_len octets. .B bv_val is not necessarily terminated by a NULL (zero) octet. .BR ber_bvfree () frees a BerValue, pointed to by \fIbv\fP, returned from this API. If \fIbv\fP is NULL, the routine does nothing. .LP .BR ber_bvecfree () frees an array of BerValues (and the array), pointed to by \fIbvec\fP, returned from this API. If \fIbvec\fP is NULL, the routine does nothing. .BR ber_bvecadd () appends the \fIbv\fP pointer to the \fIbvec\fP array. Space for the array is allocated as needed. The end of the array is marked by a NULL pointer. .LP .BR ber_bvarray_free () frees an array of BerValues (and the array), pointed to by \fIbvarray\fP, returned from this API. If \fIbvarray\fP is NULL, the routine does nothing. .BR ber_bvarray_add () appends the contents of the BerValue pointed to by \fIbv\fP to the \fIbvarray\fP 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. .LP .BR ber_bvdup () returns a copy of a BerValue. The routine returns NULL upon error (e.g. out of memory). The caller should use .BR ber_bvfree () to deallocate the resulting BerValue. .BR ber_dupbv () copies a BerValue from \fIsrc\fP to \fIdst\fP. If \fIdst\fP 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 \fIdst\fP is NULL the caller should use .BR ber_bvfree () to deallocate the resulting BerValue, otherwise .BR ber_memfree () should be used to deallocate the \fIdst->bv_val\fP. (The .BR ber_bvdup () function is internally implemented as ber_dupbv(NULL, bv). .BR ber_bvdup () is provided only for compatibility with an expired draft of the LDAP C API; .BR ber_dupbv () is the preferred interface.) .LP .BR ber_bvstr () returns a BerValue containing the string pointed to by \fIstr\fP. .BR ber_bvstrdup () returns a BerValue containing a copy of the string pointed to by \fIstr\fP. .BR ber_str2bv () returns a BerValue containing the string pointed to by \fIstr\fP, whose length may be optionally specified in \fIlen\fP. If \fIdup\fP is non-zero, the BerValue will contain a copy of \fIstr\fP. If \fIlen\fP is zero, the number of bytes to copy will be determined by .BR strlen (3), otherwise \fIlen\fP bytes will be copied. If \fIbv\fP 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 .BR ber_bvstr () and .BR ber_bvstrdup () are implemented as macros using .BR ber_str2bv () in this version of the library. .LP .B BerElement is an opaque structure used to maintain state information used in encoding and decoding. .BR ber_alloc_t () is used to create an empty BerElement structure. If .B LBER_USE_DER is specified for the .I options parameter then data lengths for data written to the BerElement will be encoded in the minimal number of octets required, otherwise they will always be written as four byte values. .BR ber_init () creates a BerElement structure that is initialized with a copy of the data in its .I bv parameter. .BR ber_init2 () initializes an existing BerElement .I ber using the data in the .I bv parameter. The data is referenced directly, not copied. The .I options parameter is the same as for .BR ber_alloc_t (). .BR ber_free () frees a BerElement pointed to by \fIber\fP. If \fIber\fP is NULL, the routine does nothing. If \fIfreebuf\fP is zero, the internal buffer is not freed. .SH SEE ALSO .BR lber-encode (3), .BR lber-decode (3), .BR lber-memory (3) .LP .SH ACKNOWLEDGEMENTS .lf 1 ./../Project .\" Shared Project Acknowledgement Text .B "OpenLDAP Software" is developed and maintained by The OpenLDAP Project <http://www.openldap.org/>. .B "OpenLDAP Software" is derived from the University of Michigan LDAP 3.3 Release. .lf 189 stdin
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