/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_extension.c,v 1.4.2.1 2010-06-08 18:50:42 bfriesen Exp $ */ /* * 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" 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; } /* * Local Variables: * mode: c * c-basic-offset: 8 * fill-column: 78 * End: */