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/*
* 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);
}
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