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Updates from internal copy. Better branch prediction, ability to set Brotli quality on ConvertTTFToWOFF2

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This commit is contained in:
Rod Sheeter
2015-07-13 09:08:04 -07:00
parent e3ea2285a7
commit ea4c87a2c5
6 changed files with 225 additions and 155 deletions
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src/woff2_common.cc
+8 -1
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@@ -24,9 +24,16 @@ namespace woff2 {
uint32_t ComputeULongSum(const uint8_t* buf, size_t size) {
uint32_t checksum = 0;
for (size_t i = 0; i < size; i += 4) {
// We assume the addition is mod 2^32, which is valid because unsigned
#if (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__))
uint32_t v = *reinterpret_cast<const uint32_t*>(buf + i);
checksum += (((v & 0xFF) << 24) | ((v & 0xFF00) << 8) |
((v & 0xFF0000) >> 8) | ((v & 0xFF000000) >> 24));
#elif (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
checksum += *reinterpret_cast<const uint32_t*>(buf + i);
#else
checksum += (buf[i] << 24) | (buf[i + 1] << 16) |
(buf[i + 2] << 8) | buf[i + 3];
#endif
}
return checksum;
}