src/tiff/tif_extension.c

/* $Header$ */

/*
 * Copyright (c) 1988-1997 Sam Leffler
 * Copyright (c) 1991-1997 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Sam Leffler and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Sam Leffler and Silicon Graphics.
 *
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

/*
 * TIFF Library.
 *
 * Various routines support external extension of the tag set, and other
 * application extension capabilities.
 */

#include "tiffiop.h"
#include <assert.h>

int TIFFGetTagListCount( TIFF *tif )

{
    TIFFDirectory* td = &tif->tif_dir;

    return td->td_customValueCount;
}

ttag_t TIFFGetTagListEntry( TIFF *tif, int tag_index )

{
    TIFFDirectory* td = &tif->tif_dir;

    if( tag_index < 0 || tag_index >= td->td_customValueCount )
        return (ttag_t) -1;
    else
        return td->td_customValues[tag_index].info->field_tag;
}

/*
** This provides read/write access to the TIFFTagMethods within the TIFF
** structure to application code without giving access to the private
** TIFF structure.
*/
TIFFTagMethods *TIFFAccessTagMethods( TIFF *tif )

{
    return &(tif->tif_tagmethods);
}

void *TIFFGetClientInfo( TIFF *tif, const char *name )

{
    TIFFClientInfoLink *link = tif->tif_clientinfo;

    while( link != NULL && strcmp(link->name,name) != 0 )
        link = link->next;

    if( link != NULL )
        return link->data;
    else
        return NULL;
}

void TIFFSetClientInfo( TIFF *tif, void *data, const char *name )

{
    TIFFClientInfoLink *link = tif->tif_clientinfo;

    /*
    ** Do we have an existing link with this name?  If so, just
    ** set it.
    */
    while( link != NULL && strcmp(link->name,name) != 0 )
        link = link->next;

    if( link != NULL )
    {
        link->data = data;
        return;
    }

    /*
    ** Create a new link.
    */

    link = (TIFFClientInfoLink *) _TIFFmalloc(sizeof(TIFFClientInfoLink));
    assert (link != NULL);
    link->next = tif->tif_clientinfo;
    link->name = (char *) _TIFFmalloc(strlen(name)+1);
    assert (link->name != NULL);
    strcpy(link->name, name);
    link->data = data;

    tif->tif_clientinfo = link;
}
Commit	Line	Data
	1	/* $Header$ */
	2
	3	/*
	4	* Copyright (c) 1988-1997 Sam Leffler
	5	* Copyright (c) 1991-1997 Silicon Graphics, Inc.
	6	*
	7	* Permission to use, copy, modify, distribute, and sell this software and
	8	* its documentation for any purpose is hereby granted without fee, provided
	9	* that (i) the above copyright notices and this permission notice appear in
	10	* all copies of the software and related documentation, and (ii) the names of
	11	* Sam Leffler and Silicon Graphics may not be used in any advertising or
	12	* publicity relating to the software without the specific, prior written
	13	* permission of Sam Leffler and Silicon Graphics.
	14	*
	15	* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	16	* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	17	* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	18	*
	19	* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	20	* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	21	* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	22	* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	23	* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	24	* OF THIS SOFTWARE.
	25	*/
	26
	27	/*
	28	* TIFF Library.
	29	*
	30	* Various routines support external extension of the tag set, and other
	31	* application extension capabilities.
	32	*/
	33
	34	#include "tiffiop.h"
	35	#include <assert.h>
	36
	37	int TIFFGetTagListCount( TIFF *tif )
	38
	39	{
	40	TIFFDirectory* td = &tif->tif_dir;
	41
	42	return td->td_customValueCount;
	43	}
	44
	45	ttag_t TIFFGetTagListEntry( TIFF *tif, int tag_index )
	46
	47	{
	48	TIFFDirectory* td = &tif->tif_dir;
	49
	50	if( tag_index < 0 \|\| tag_index >= td->td_customValueCount )
	51	return (ttag_t) -1;
	52	else
	53	return td->td_customValues[tag_index].info->field_tag;
	54	}
	55
	56	/*
	57	** This provides read/write access to the TIFFTagMethods within the TIFF
	58	** structure to application code without giving access to the private
	59	** TIFF structure.
	60	*/
	61	TIFFTagMethods TIFFAccessTagMethods( TIFF tif )
	62
	63	{
	64	return &(tif->tif_tagmethods);
	65	}
	66
	67	void TIFFGetClientInfo( TIFF tif, const char *name )
	68
	69	{
	70	TIFFClientInfoLink *link = tif->tif_clientinfo;
	71
	72	while( link != NULL && strcmp(link->name,name) != 0 )
	73	link = link->next;
	74
	75	if( link != NULL )
	76	return link->data;
	77	else
	78	return NULL;
	79	}
	80
	81	void TIFFSetClientInfo( TIFF tif, void data, const char *name )
	82
	83	{
	84	TIFFClientInfoLink *link = tif->tif_clientinfo;
	85
	86	/*
	87	** Do we have an existing link with this name? If so, just
	88	** set it.
	89	*/
	90	while( link != NULL && strcmp(link->name,name) != 0 )
	91	link = link->next;
	92
	93	if( link != NULL )
	94	{
	95	link->data = data;
	96	return;
	97	}
	98
	99	/*
	100	** Create a new link.
	101	*/
	102
	103	link = (TIFFClientInfoLink *) _TIFFmalloc(sizeof(TIFFClientInfoLink));
	104	assert (link != NULL);
	105	link->next = tif->tif_clientinfo;
	106	link->name = (char *) _TIFFmalloc(strlen(name)+1);
	107	assert (link->name != NULL);
	108	strcpy(link->name, name);
	109	link->data = data;
	110
	111	tif->tif_clientinfo = link;
	112	}