75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
/************************************************************************/
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/* SISCO SOFTWARE MODULE HEADER *****************************************/
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/************************************************************************/
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/* (c) Copyright Systems Integration Specialists Company, Inc., */
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/* 1986 - 2002, All Rights Reserved. */
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/* */
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/* PROPRIETARY AND CONFIDENTIAL */
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/* */
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/* MODULE NAME : are_bstr.c */
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/* PRODUCT(S) : ASN1DE */
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/* */
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/* MODULE DESCRIPTION : */
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/* */
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/* GLOBAL FUNCTIONS DEFINED IN THIS MODULE : */
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/* */
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/* MODIFICATION LOG : */
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/* Date Who Rev Comments */
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/* -------- --- ------ ------------------------------------------- */
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/* 04/09/08 JRB 08 Fail encode if Bstring len < 0. */
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/* 03/11/04 GLB 07 Remove "thisFileName" */
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/* 01/14/03 JRB 06 Avoid redundant logging of encode overrun. */
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/* 03/05/02 JRB 05 Eliminate warnings. */
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/* 01/22/02 JRB 04 Chg asn1r_end_of_buffer to asn1r_buf_start. */
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/* 12/20/01 JRB 03 Chg ASN1_CTXT to ASN1_ENC_CTXT. */
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/* 09/13/99 MDE 02 Added SD_CONST modifiers */
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/* 07/26/99 MDE 01 New module, derived from ae_bstr.c */
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/************************************************************************/
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#include "glbtypes.h"
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#include "sysincs.h"
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#include "asn1r.h"
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#include "asn1log.h"
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#ifdef DEBUG_SISCO
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SD_CONST static ST_CHAR *SD_CONST thisFileName = __FILE__;
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#endif
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/************************************************************************/
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/* wr_bitstr */
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/************************************************************************/
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ST_VOID asn1r_wr_bitstr (ASN1_ENC_CTXT *ac, ST_UCHAR *bitPtr, ST_INT numBits)
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{
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ST_INT bitsLeft;
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ST_INT numBytes;
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if (numBits < 0)
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{
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ALOG_ERR0 ("ASN.1 Bitstring encode: Length < 0 not allowed");
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/* This is not really an overrun, but the overrun flag is the only */
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/* thing checked by the caller to detect an encoding error. */
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ac->asn1r_encode_overrun = SD_TRUE;
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return;
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}
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numBytes = numBits/8; /* calculate the total # bytes req'd */
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if ((bitsLeft = numBits % 8)!=0) /* get remainder */
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numBytes++;
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if (ac->asn1r_field_ptr - numBytes < ac->asn1r_buf_start)
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{
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ac->asn1r_encode_overrun = SD_TRUE;
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return;
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}
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ac->asn1r_field_ptr -= numBytes;
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memcpy (ac->asn1r_field_ptr+1, bitPtr, numBytes);
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if (bitsLeft) /* write the unused-bits octet */
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*(ac->asn1r_field_ptr--) = (ST_UCHAR) (8 - bitsLeft);
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else
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*(ac->asn1r_field_ptr--) = 0;
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}
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