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[unicode] Handle not properly written UTF8 in nextCodePoint

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This commit is contained in:
Léa Saviot
2019-01-31 11:55:03 +01:00
committed by Émilie Feral
parent cbb1055218
commit 35f65ae255
1 changed files with 7 additions and 1 deletions
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8
ion/src/shared/unicode/utf8_decoder.cpp
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@@ -23,7 +23,13 @@ CodePoint UTF8Decoder::nextCodePoint() {
uint32_t result = last_k_bits(*m_stringPosition++, 8-leadingOnes-1);
for (int i = 0; i < leadingOnes - 1; i++) {
result <<= 6;
result += (*m_stringPosition++ & 0x3F);
char nextChunk = *m_stringPosition++;
if (!nextChunk && 0x80) {
/* The code point is not properly written. This might be due to a code
* point being translated into chars in a too small buffer. */
return UCodePointNull;
}
result += (nextChunk & 0x3F);
}
return CodePoint(result);
}