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-rw-r--r--src/libid3tag/util.c147
1 files changed, 0 insertions, 147 deletions
diff --git a/src/libid3tag/util.c b/src/libid3tag/util.c
index 61ccccf6..e69de29b 100644
--- a/src/libid3tag/util.c
+++ b/src/libid3tag/util.c
@@ -1,147 +0,0 @@
-/*
- * 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: util.c,v 1.9 2004/01/23 09:41:32 rob Exp $
- */
-
-# ifdef HAVE_CONFIG_H
-# include "config.h"
-# endif
-
-# include "global.h"
-
-# include <stdlib.h>
-# include <zlib.h>
-
-# include "id3tag.h"
-# include "util.h"
-
-/*
- * NAME: util->unsynchronise()
- * DESCRIPTION: perform (in-place) unsynchronisation
- */
-id3_length_t id3_util_unsynchronise(id3_byte_t *data, id3_length_t length)
-{
- id3_length_t bytes = 0, count;
- id3_byte_t *end = data + length;
- id3_byte_t const *ptr;
-
- if (length == 0)
- return 0;
-
- for (ptr = data; ptr < end - 1; ++ptr) {
- if (ptr[0] == 0xff && (ptr[1] == 0x00 || (ptr[1] & 0xe0) == 0xe0))
- ++bytes;
- }
-
- if (bytes) {
- ptr = end;
- end += bytes;
-
- *--end = *--ptr;
-
- for (count = bytes; count; *--end = *--ptr) {
- if (ptr[-1] == 0xff && (ptr[0] == 0x00 || (ptr[0] & 0xe0) == 0xe0)) {
- *--end = 0x00;
- --count;
- }
- }
- }
-
- return length + bytes;
-}
-
-/*
- * NAME: util->deunsynchronise()
- * DESCRIPTION: undo unsynchronisation (in-place)
- */
-id3_length_t id3_util_deunsynchronise(id3_byte_t *data, id3_length_t length)
-{
- id3_byte_t const *old, *end = data + length;
- id3_byte_t *new;
-
- if (length == 0)
- return 0;
-
- for (old = new = data; old < end - 1; ++old) {
- *new++ = *old;
- if (old[0] == 0xff && old[1] == 0x00)
- ++old;
- }
-
- *new++ = *old;
-
- return new - data;
-}
-
-/*
- * NAME: util->compress()
- * DESCRIPTION: perform zlib deflate method compression
- */
-id3_byte_t *id3_util_compress(id3_byte_t const *data, id3_length_t length,
- id3_length_t *newlength)
-{
- id3_byte_t *compressed;
-
- *newlength = length + 12;
- *newlength += *newlength / 1000;
-
- compressed = malloc(*newlength);
- if (compressed) {
- if (compress2(compressed, newlength, data, length,
- Z_BEST_COMPRESSION) != Z_OK ||
- *newlength >= length) {
- free(compressed);
- compressed = 0;
- }
- else {
- id3_byte_t *resized;
-
- resized = realloc(compressed, *newlength ? *newlength : 1);
- if (resized)
- compressed = resized;
- }
- }
-
- return compressed;
-}
-
-/*
- * NAME: util->decompress()
- * DESCRIPTION: undo zlib deflate method compression
- */
-id3_byte_t *id3_util_decompress(id3_byte_t const *data, id3_length_t length,
- id3_length_t newlength)
-{
- id3_byte_t *decompressed;
-
- decompressed = malloc(newlength ? newlength : 1);
- if (decompressed) {
- id3_length_t size;
-
- size = newlength;
-
- if (uncompress(decompressed, &size, data, length) != Z_OK ||
- size != newlength) {
- free(decompressed);
- decompressed = 0;
- }
- }
-
- return decompressed;
-}