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gst/id3demux/id3v2frames.c: Recognise and skip any byte order marker (BOM) in

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Original commit message from CVS:
* gst/id3demux/id3v2frames.c: (has_utf16_bom),
(parse_split_strings):
Recognise and skip any byte order marker (BOM) in
UTF-16 strings.
This commit is contained in:
Tim-Philipp Müller 2006-04-28 11:37:22 +00:00
parent b88deddeca
commit d5296f2895
2 changed files with 31 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2006-04-28 Tim-Philipp Müller <tim at centricular dot net>
* gst/id3demux/id3v2frames.c: (has_utf16_bom),
(parse_split_strings):
Recognise and skip any byte order marker (BOM) in
UTF-16 strings.
2006-04-27 Tim-Philipp Müller <tim at centricular dot net>
* docs/plugins/Makefile.am:

24
gst/id3demux/id3v2frames.c
View file

@ -668,6 +668,24 @@ parse_insert_string_field (const gchar * encoding, gchar * data, gint data_size,
g_array_append_val (fields, field);
}
static gboolean
has_utf16_bom (gchar * data, const gchar ** p_in_encoding)
{
guint16 marker = (GST_READ_UINT8 (data) << 8) | GST_READ_UINT8 (data + 1);
switch (marker) {
case 0xFFFE:
*p_in_encoding = "UTF16LE";
return TRUE;
case 0xFEFF:
*p_in_encoding = "UTF16BE";
return TRUE;
default:
break;
}
return FALSE;
}
static void
parse_split_strings (guint8 encoding, gchar * data, gint data_size,
GArray ** out_fields)
@ -719,6 +737,9 @@ parse_split_strings (guint8 encoding, gchar * data, gint data_size,
/* Find '\0\0' terminator */
for (text_pos = 0; text_pos < data_size - 1; text_pos += 2) {
if (data[text_pos] == '\0' && data[text_pos + 1] == '\0') {
if (has_utf16_bom (data + prev, &in_encode)) {
prev += 2; /* skip BOM */
}
/* found a delimiter */
parse_insert_string_field (in_encode, data + prev,
text_pos - prev + 2, fields);
@ -729,6 +750,9 @@ parse_split_strings (guint8 encoding, gchar * data, gint data_size,
}
if (data_size - prev > 1 &&
(data[prev] != 0x00 || data[prev + 1] != 0x00)) {
if (has_utf16_bom (data + prev, &in_encode)) {
prev += 2; /* skip BOM */
}
/* There were 2 or more non-null chars left, convert those too */
parse_insert_string_field (in_encode, data + prev,
data_size - prev, fields);