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avcodec/xpmdec: make convert function more picky about its input
Signed-off-by: Paul B Mahol <onemda@gmail.com>
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@ -185,15 +185,16 @@ static const ColorEntry color_table[] = {
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{ "YellowGreen", 0xFF9ACD32 }
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};
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static int convert(uint8_t x)
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static unsigned convert(uint8_t x)
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{
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if (x >= 'a') {
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if (x >= 'a' && x <= 'f')
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x -= 87;
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} else if (x >= 'A') {
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else if (x >= 'A' && x <= 'F')
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x -= 55;
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} else {
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else if (x >= '0' && x <= '9')
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x -= '0';
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}
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else
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x = 0;
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return x;
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}
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