cannam@85: /*
cannam@85:  * libid3tag - ID3 tag manipulation library
cannam@85:  * Copyright (C) 2000-2004 Underbit Technologies, Inc.
cannam@85:  *
cannam@85:  * This program is free software; you can redistribute it and/or modify
cannam@85:  * it under the terms of the GNU General Public License as published by
cannam@85:  * the Free Software Foundation; either version 2 of the License, or
cannam@85:  * (at your option) any later version.
cannam@85:  *
cannam@85:  * This program is distributed in the hope that it will be useful,
cannam@85:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@85:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@85:  * GNU General Public License for more details.
cannam@85:  *
cannam@85:  * You should have received a copy of the GNU General Public License
cannam@85:  * along with this program; if not, write to the Free Software
cannam@85:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
cannam@85:  *
cannam@85:  * $Id: render.c,v 1.11 2004/01/23 09:41:32 rob Exp $
cannam@85:  */
cannam@85: 
cannam@85: # ifdef HAVE_CONFIG_H
cannam@85: #  include "config.h"
cannam@85: # endif
cannam@85: 
cannam@85: # include "global.h"
cannam@85: 
cannam@85: # include <string.h>
cannam@85: # include <stdlib.h>
cannam@85: 
cannam@85: # ifdef HAVE_ASSERT_H
cannam@85: #  include <assert.h>
cannam@85: # endif
cannam@85: 
cannam@85: # include "id3tag.h"
cannam@85: # include "render.h"
cannam@85: # include "ucs4.h"
cannam@85: # include "latin1.h"
cannam@85: # include "utf16.h"
cannam@85: # include "utf8.h"
cannam@85: 
cannam@85: id3_length_t id3_render_immediate(id3_byte_t **ptr,
cannam@85: 				  char const *value, unsigned int bytes)
cannam@85: {
cannam@85:   assert(value);
cannam@85:   assert(bytes == 8 || bytes == 4 || bytes == 3);
cannam@85: 
cannam@85:   if (ptr) {
cannam@85:     switch (bytes) {
cannam@85:     case 8: *(*ptr)++ = *value++;
cannam@85:             *(*ptr)++ = *value++;
cannam@85: 	    *(*ptr)++ = *value++;
cannam@85: 	    *(*ptr)++ = *value++;
cannam@85:     case 4: *(*ptr)++ = *value++;
cannam@85:     case 3: *(*ptr)++ = *value++;
cannam@85:             *(*ptr)++ = *value++;
cannam@85: 	    *(*ptr)++ = *value++;
cannam@85:     }
cannam@85:   }
cannam@85: 
cannam@85:   return bytes;
cannam@85: }
cannam@85: 
cannam@85: id3_length_t id3_render_syncsafe(id3_byte_t **ptr,
cannam@85: 				 unsigned long num, unsigned int bytes)
cannam@85: {
cannam@85:   assert(bytes == 4 || bytes == 5);
cannam@85: 
cannam@85:   if (ptr) {
cannam@85:     switch (bytes) {
cannam@85:     case 5: *(*ptr)++ = (num >> 28) & 0x0f;
cannam@85:     case 4: *(*ptr)++ = (num >> 21) & 0x7f;
cannam@85:             *(*ptr)++ = (num >> 14) & 0x7f;
cannam@85: 	    *(*ptr)++ = (num >>  7) & 0x7f;
cannam@85: 	    *(*ptr)++ = (num >>  0) & 0x7f;
cannam@85:     }
cannam@85:   }
cannam@85: 
cannam@85:   return bytes;
cannam@85: }
cannam@85: 
cannam@85: id3_length_t id3_render_int(id3_byte_t **ptr,
cannam@85: 			    signed long num, unsigned int bytes)
cannam@85: {
cannam@85:   assert(bytes >= 1 && bytes <= 4);
cannam@85: 
cannam@85:   if (ptr) {
cannam@85:     switch (bytes) {
cannam@85:     case 4: *(*ptr)++ = num >> 24;
cannam@85:     case 3: *(*ptr)++ = num >> 16;
cannam@85:     case 2: *(*ptr)++ = num >>  8;
cannam@85:     case 1: *(*ptr)++ = num >>  0;
cannam@85:     }
cannam@85:   }
cannam@85: 
cannam@85:   return bytes;
cannam@85: }
cannam@85: 
cannam@85: id3_length_t id3_render_binary(id3_byte_t **ptr,
cannam@85: 			       id3_byte_t const *data, id3_length_t length)
cannam@85: {
cannam@85:   if (data == 0)
cannam@85:     return 0;
cannam@85: 
cannam@85:   if (ptr) {
cannam@85:     memcpy(*ptr, data, length);
cannam@85:     *ptr += length;
cannam@85:   }
cannam@85: 
cannam@85:   return length;
cannam@85: }
cannam@85: 
cannam@85: id3_length_t id3_render_latin1(id3_byte_t **ptr,
cannam@85: 			       id3_latin1_t const *latin1, int terminate)
cannam@85: {
cannam@85:   id3_length_t size;
cannam@85: 
cannam@85:   if (latin1 == 0)
cannam@85:     latin1 = "";
cannam@85: 
cannam@85:   size = id3_latin1_size(latin1);
cannam@85:   if (!terminate)
cannam@85:     --size;
cannam@85: 
cannam@85:   if (ptr) {
cannam@85:     memcpy(*ptr, latin1, size);
cannam@85:     *ptr += size;
cannam@85:   }
cannam@85: 
cannam@85:   return size;
cannam@85: }
cannam@85: 
cannam@85: id3_length_t id3_render_string(id3_byte_t **ptr, id3_ucs4_t const *ucs4,
cannam@85: 			       enum id3_field_textencoding encoding,
cannam@85: 			       int terminate)
cannam@85: {
cannam@85:   enum id3_utf16_byteorder byteorder = ID3_UTF16_BYTEORDER_ANY;
cannam@85: 
cannam@85:   if (ucs4 == 0)
cannam@85:     ucs4 = id3_ucs4_empty;
cannam@85: 
cannam@85:   switch (encoding) {
cannam@85:   case ID3_FIELD_TEXTENCODING_ISO_8859_1:
cannam@85:     return id3_latin1_serialize(ptr, ucs4, terminate);
cannam@85: 
cannam@85:   case ID3_FIELD_TEXTENCODING_UTF_16BE:
cannam@85:     byteorder = ID3_UTF16_BYTEORDER_BE;
cannam@85:   case ID3_FIELD_TEXTENCODING_UTF_16:
cannam@85:     return id3_utf16_serialize(ptr, ucs4, byteorder, terminate);
cannam@85: 
cannam@85:   case ID3_FIELD_TEXTENCODING_UTF_8:
cannam@85:     return id3_utf8_serialize(ptr, ucs4, terminate);
cannam@85:   }
cannam@85: 
cannam@85:   return 0;
cannam@85: }
cannam@85: 
cannam@85: id3_length_t id3_render_padding(id3_byte_t **ptr, id3_byte_t value,
cannam@85: 				id3_length_t length)
cannam@85: {
cannam@85:   if (ptr) {
cannam@85:     memset(*ptr, value, length);
cannam@85:     *ptr += length;
cannam@85:   }
cannam@85: 
cannam@85:   return length;
cannam@85: }
cannam@85: 
cannam@85: /*
cannam@85:  * NAME:	render->paddedstring()
cannam@85:  * DESCRIPTION:	render a space-padded string using latin1 encoding
cannam@85:  */
cannam@85: id3_length_t id3_render_paddedstring(id3_byte_t **ptr, id3_ucs4_t const *ucs4,
cannam@85: 				     id3_length_t length)
cannam@85: {
cannam@85:   id3_ucs4_t padded[31], *data, *end;
cannam@85: 
cannam@85:   /* latin1 encoding only (this is used for ID3v1 fields) */
cannam@85: 
cannam@85:   assert(length <= 30);
cannam@85: 
cannam@85:   data = padded;
cannam@85:   end  = data + length;
cannam@85: 
cannam@85:   if (ucs4) {
cannam@85:     while (*ucs4 && end - data > 0) {
cannam@85:       *data++ = *ucs4++;
cannam@85: 
cannam@85:       if (data[-1] == '\n')
cannam@85: 	data[-1] = ' ';
cannam@85:     }
cannam@85:   }
cannam@85: 
cannam@85:   while (end - data > 0)
cannam@85:     *data++ = ' ';
cannam@85: 
cannam@85:   *data = 0;
cannam@85: 
cannam@85:   return id3_latin1_serialize(ptr, padded, 0);
cannam@85: }