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[ion] Change crc32 implementation for simulator, blackbox and emscripten

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to avoid alignment issue on emscripten platform
This commit is contained in:
Émilie Feral
2018-10-18 17:20:17 +02:00
committed by LeaNumworks
parent db7e79510d
commit a3763b9a3a
1 changed files with 5 additions and 6 deletions
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11
ion/src/shared/crc32.cpp
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@@ -11,13 +11,12 @@ static uint32_t crc32(uint32_t crc, uint8_t data) {
}
uint32_t Ion::crc32(const uint32_t * data, size_t length) {
const uint8_t * dataByte = (const uint8_t *)data;
size_t byteLength = length*sizeof(uint32_t)/sizeof(uint8_t);
uint32_t crc = 0xFFFFFFFF;
for (size_t i=0; i<length; i++) {
// FIXME: Assumes little-endian byte order!
crc = ::crc32(crc, (uint8_t)((data[i] >> 24) & 0xFF));
crc = ::crc32(crc, (uint8_t)((data[i] >> 16) & 0xFF));
crc = ::crc32(crc, (uint8_t)((data[i] >> 8) & 0xFF));
crc = ::crc32(crc, (uint8_t)(data[i] & 0xFF));
for (size_t i=0; i<byteLength; i++) {
// scan byte by byte to avoid alignment issue when building for emscripten platform
crc = ::crc32(crc, dataByte[i]);
}
return crc;
}