diff src/libid3tag-0.15.1b/parse.c @ 85:545efbb81310

Import initial set of sources

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libid3tag-0.15.1b/parse.c	Mon Mar 18 14:12:14 2013 +0000
@@ -0,0 +1,196 @@
+/*
+ * 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: parse.c,v 1.9 2004/01/23 09:41:32 rob Exp $
+ */
+
+# ifdef HAVE_CONFIG_H
+#  include "config.h"
+# endif
+
+# include "global.h"
+
+# ifdef HAVE_ASSERT_H
+#  include <assert.h>
+# endif
+
+# include <stdlib.h>
+# include <string.h>
+
+# include "id3tag.h"
+# include "parse.h"
+# include "latin1.h"
+# include "utf16.h"
+# include "utf8.h"
+
+signed long id3_parse_int(id3_byte_t const **ptr, unsigned int bytes)
+{
+  signed long value = 0;
+
+  assert(bytes >= 1 && bytes <= 4);
+
+  if (**ptr & 0x80)
+    value = ~0;
+
+  switch (bytes) {
+  case 4: value = (value << 8) | *(*ptr)++;
+  case 3: value = (value << 8) | *(*ptr)++;
+  case 2: value = (value << 8) | *(*ptr)++;
+  case 1: value = (value << 8) | *(*ptr)++;
+  }
+
+  return value;
+}
+
+unsigned long id3_parse_uint(id3_byte_t const **ptr, unsigned int bytes)
+{
+  unsigned long value = 0;
+
+  assert(bytes >= 1 && bytes <= 4);
+
+  switch (bytes) {
+  case 4: value = (value << 8) | *(*ptr)++;
+  case 3: value = (value << 8) | *(*ptr)++;
+  case 2: value = (value << 8) | *(*ptr)++;
+  case 1: value = (value << 8) | *(*ptr)++;
+  }
+
+  return value;
+}
+
+unsigned long id3_parse_syncsafe(id3_byte_t const **ptr, unsigned int bytes)
+{
+  unsigned long value = 0;
+
+  assert(bytes == 4 || bytes == 5);
+
+  switch (bytes) {
+  case 5: value = (value << 4) | (*(*ptr)++ & 0x0f);
+  case 4: value = (value << 7) | (*(*ptr)++ & 0x7f);
+          value = (value << 7) | (*(*ptr)++ & 0x7f);
+	  value = (value << 7) | (*(*ptr)++ & 0x7f);
+	  value = (value << 7) | (*(*ptr)++ & 0x7f);
+  }
+
+  return value;
+}
+
+void id3_parse_immediate(id3_byte_t const **ptr, unsigned int bytes,
+			 char *value)
+{
+  assert(value);
+  assert(bytes == 8 || bytes == 4 || bytes == 3);
+
+  switch (bytes) {
+  case 8: *value++ = *(*ptr)++;
+          *value++ = *(*ptr)++;
+	  *value++ = *(*ptr)++;
+	  *value++ = *(*ptr)++;
+  case 4: *value++ = *(*ptr)++;
+  case 3: *value++ = *(*ptr)++;
+          *value++ = *(*ptr)++;
+	  *value++ = *(*ptr)++;
+  }
+
+  *value = 0;
+}
+
+id3_latin1_t *id3_parse_latin1(id3_byte_t const **ptr, id3_length_t length,
+			       int full)
+{
+  id3_byte_t const *end;
+  int terminated = 0;
+  id3_latin1_t *latin1;
+
+  end = memchr(*ptr, 0, length);
+  if (end == 0)
+    end = *ptr + length;
+  else {
+    length = end - *ptr;
+    terminated = 1;
+  }
+
+  latin1 = malloc(length + 1);
+  if (latin1) {
+    memcpy(latin1, *ptr, length);
+    latin1[length] = 0;
+
+    if (!full) {
+      id3_latin1_t *check;
+
+      for (check = latin1; *check; ++check) {
+	if (*check == '\n')
+	  *check = ' ';
+      }
+    }
+  }
+
+  *ptr += length + terminated;
+
+  return latin1;
+}
+
+id3_ucs4_t *id3_parse_string(id3_byte_t const **ptr, id3_length_t length,
+			     enum id3_field_textencoding encoding, int full)
+{
+  id3_ucs4_t *ucs4 = 0;
+  enum id3_utf16_byteorder byteorder = ID3_UTF16_BYTEORDER_ANY;
+
+  switch (encoding) {
+  case ID3_FIELD_TEXTENCODING_ISO_8859_1:
+    ucs4 = id3_latin1_deserialize(ptr, length);
+    break;
+
+  case ID3_FIELD_TEXTENCODING_UTF_16BE:
+    byteorder = ID3_UTF16_BYTEORDER_BE;
+  case ID3_FIELD_TEXTENCODING_UTF_16:
+    ucs4 = id3_utf16_deserialize(ptr, length, byteorder);
+    break;
+
+  case ID3_FIELD_TEXTENCODING_UTF_8:
+    ucs4 = id3_utf8_deserialize(ptr, length);
+    break;
+  }
+
+  if (ucs4 && !full) {
+    id3_ucs4_t *check;
+
+    for (check = ucs4; *check; ++check) {
+      if (*check == '\n')
+	*check = ' ';
+    }
+  }
+
+  return ucs4;
+}
+
+id3_byte_t *id3_parse_binary(id3_byte_t const **ptr, id3_length_t length)
+{
+  id3_byte_t *data;
+
+  if (length == 0)
+    return malloc(1);
+
+  data = malloc(length);
+  if (data)
+    memcpy(data, *ptr, length);
+
+  *ptr += length;
+
+  return data;
+}