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