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/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/*** tdf-write.c --- TDF writer ADT.

 *

 ** Author: Steve Folkes <smf@hermes.mod.uk>

 *

 *** Commentary:

 *

 * This file implements the TDF writer routines used by the TDF linker.

 *

 *** Change Log:

 * $Log: tdf-write.c,v $

 * Revision 1.1.1.1  1998/01/17  15:57:20  release

 * First version to be checked into rolling release.

 *

 * Revision 1.3  1995/09/22  08:39:40  smf

 * Fixed problems with incomplete structures (to shut "tcc" up).

 * Fixed some problems in "name-key.c" (no real problems, but rewritten to

 * reduce the warnings that were output by "tcc" and "gcc").

 * Fixed bug CR95_354.tld-common-id-problem (library capsules could be loaded

 * more than once).

 *

 * Revision 1.2  1994/12/12  11:46:58  smf

 * Performing changes for 'CR94_178.sid+tld-update' - bringing in line with

 * OSSG C Coding Standards.

 *

 * Revision 1.1.1.1  1994/07/25  16:03:39  smf

 * Initial import of TDF linker 3.5 non shared files.

 *

**/

/****************************************************************************/

#include "tdf-write.h"

#include "gen-errors.h"

#include "ostream.h"

#include "solve-cycles.h"

/*--------------------------------------------------------------------------*/

static void

tdf_write_nibble PROTO_N ((writer, nibble))

		 PROTO_T (TDFWriterP writer X

			  unsigned   nibble)

{

    if (writer->new_byte) {

	writer->new_byte = FALSE;

	writer->byte     = (ByteT) ((nibble & 0x0F) << 4);

    } else {

	writer->new_byte = TRUE;

	writer->byte    |= (ByteT) (nibble & 0x0F);

	bostream_write_byte (&(writer->bostream), writer->byte);

    }

}

/*--------------------------------------------------------------------------*/

BoolT

tdf_writer_open PROTO_N ((writer, name))

		PROTO_T (TDFWriterP writer X

			 CStringP   name)

{

    writer->new_byte = TRUE;

    if (!bostream_open (&(writer->bostream), name)) {

	return (FALSE);

    }

    return (TRUE);

}

CStringP

tdf_writer_name PROTO_N ((writer))

		PROTO_T (TDFWriterP writer)

{

    return (bostream_name (&(writer->bostream)));

}

void

tdf_write_int PROTO_N ((writer, value))

	      PROTO_T (TDFWriterP writer X

		       unsigned   value)

{

    unsigned shift = 0;

    unsigned tmp   = value;

    unsigned mask  = (~(unsigned) 0x07);

    while (tmp & mask) {

	tmp >>= 3;

	shift ++;

    }

    while (shift) {

	tmp = ((value >> (3 * shift)) & 0x07);

	shift --;

	tdf_write_nibble (writer, tmp);

    }

    tmp = ((value & 0x07) | 0x08);

    tdf_write_nibble (writer, tmp);

}

void

tdf_write_align PROTO_N ((writer))

		PROTO_T (TDFWriterP writer)

{

    if (!(writer->new_byte)) {

	bostream_write_byte (&(writer->bostream), writer->byte);

	writer->new_byte = TRUE;

    }

}

void

tdf_write_bytes PROTO_N ((writer, nstring))

		PROTO_T (TDFWriterP writer X

			 NStringP   nstring)

{

    unsigned length   = nstring_length (nstring);

    CStringP contents = nstring_contents (nstring);

    tdf_write_align (writer);

    bostream_write_chars (&(writer->bostream), length, contents);

}

void

tdf_write_string PROTO_N ((writer, nstring))

		 PROTO_T (TDFWriterP writer X

			  NStringP   nstring)

{

    unsigned length = nstring_length (nstring);

    tdf_write_int (writer, (unsigned) 8);

    tdf_write_int (writer, length);

    tdf_write_bytes (writer, nstring);

}

void

tdf_write_name PROTO_N ((writer, name))

	       PROTO_T (TDFWriterP writer X

			NameKeyP   name)

{

    unsigned  type;

    unsigned  components;

    unsigned  i;

    NStringP  nstring;

    switch (name_key_type (name)) EXHAUSTIVE {

      case KT_STRING:

	type = (unsigned) (0x1 << 2);

	tdf_write_nibble (writer, type);

	tdf_write_align (writer);

	tdf_write_string (writer, name_key_string (name));

	break;

      case KT_UNIQUE:

	type = (unsigned) (0x2 << 2);

	tdf_write_nibble (writer, type);

	tdf_write_align (writer);

	components = name_key_components (name);

	tdf_write_int (writer, components);

	for (i = 0; i < components; i ++) {

	    nstring = name_key_get_component (name, i);

	    tdf_write_string (writer, nstring);

	}

	break;

    }

}

void

tdf_writer_close PROTO_N ((writer))

		 PROTO_T (TDFWriterP writer)

{

    tdf_write_align (writer);

    bostream_close (&(writer->bostream));

}

/*

 * Local variables(smf):

 * eval: (include::add-path-entry "../os-interface" "../library")

 * eval: (include::add-path-entry "../generated")

 * end:

**/