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decoder/DsdLib: make variables more local

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This commit is contained in:
Max Kellermann 2014-08-19 20:43:43 +02:00
parent 67093a5143
commit 7087fdf6c0
1 changed files with 3 additions and 9 deletions
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12
src/decoder/plugins/DsdLib.cxx
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@ -115,29 +115,23 @@ dsdlib_tag_id3(InputStream &is,
if (!dsdlib_skip_to(nullptr, is, tagoffset))
return;
struct id3_tag *id3_tag = nullptr;
id3_length_t count;
/* Prevent broken files causing problems */
const auto size = is.GetSize();
const auto offset = is.GetOffset();
if (offset >= size)
return;
count = size - offset;
const id3_length_t count = size - offset;
/* Check and limit id3 tag size to prevent a stack overflow */
id3_byte_t dsdid3[4096];
if (count == 0 || count > sizeof(dsdid3))
return;
id3_byte_t *dsdid3data;
dsdid3data = dsdid3;
if (!decoder_read_full(nullptr, is, dsdid3data, count))
if (!decoder_read_full(nullptr, is, dsdid3, count))
return;
id3_tag = id3_tag_parse(dsdid3data, count);
struct id3_tag *id3_tag = id3_tag_parse(dsdid3, count);
if (id3_tag == nullptr)
return;