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LibPDF: Factorize duplicated code in Filter::decode_ascii85()

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This commit is contained in:
Lucas CHOLLET
2023-11-11 17:56:40 -05:00
committed by Andreas Kling
parent 2fe0647c68
commit 59a6d4b7bc
1 changed files with 8 additions and 23 deletions
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31
Userland/Libraries/LibPDF/Filter.cpp
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@@ -114,33 +114,18 @@ PDFErrorOr<ByteBuffer> Filter::decode_ascii85(ReadonlyBytes bytes)
u32 number = 0;
if (byte_index + 5 >= bytes.size()) {
auto to_write = bytes.size() - byte_index;
for (int i = 0; i < 5; i++) {
auto byte = byte_index >= bytes.size() ? 'u' : bytes[byte_index++];
if (Reader::is_whitespace(byte)) {
i--;
continue;
}
number = number * 85 + byte - 33;
}
auto const to_write = byte_index + 5 >= bytes.size() ? bytes.size() - byte_index : 5;
for (size_t i = 0; i < to_write - 1; i++)
buffer.append(reinterpret_cast<u8*>(&number)[3 - i]);
break;
} else {
for (int i = 0; i < 5; i++) {
auto byte = bytes[byte_index++];
if (Reader::is_whitespace(byte)) {
i--;
continue;
}
number = number * 85 + byte - 33;
for (int i = 0; i < 5; i++) {
auto byte = byte_index >= bytes.size() ? 'u' : bytes[byte_index++];
if (Reader::is_whitespace(byte)) {
i--;
continue;
}
number = number * 85 + byte - 33;
}
for (int i = 0; i < 4; i++)
for (size_t i = 0; i < to_write - 1; i++)
buffer.append(reinterpret_cast<u8*>(&number)[3 - i]);
}