mirror of
https://github.com/aaru-dps/Aaru.Checksums.git
synced 2025-12-16 19:24:29 +00:00
Convert if to switch statement.
This commit is contained in:
@@ -157,42 +157,44 @@ public sealed class Adler32Context : IChecksum
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uint sum2 = preSum2;
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var dataOff = 0;
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/* in case user likes doing a byte at a time, keep it fast */
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if(len == 1)
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switch(len)
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{
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sum1 += data[dataOff];
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if(sum1 >= ADLER_MODULE)
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sum1 -= ADLER_MODULE;
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sum2 += sum1;
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if(sum2 >= ADLER_MODULE)
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sum2 -= ADLER_MODULE;
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preSum1 = (ushort)(sum1 & 0xFFFF);
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preSum2 = (ushort)(sum2 & 0xFFFF);
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return;
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}
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/* in case short lengths are provided, keep it somewhat fast */
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if(len < 16)
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{
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while(len-- > 0)
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/* in case user likes doing a byte at a time, keep it fast */
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case 1:
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{
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sum1 += data[dataOff++];
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sum1 += data[dataOff];
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if(sum1 >= ADLER_MODULE)
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sum1 -= ADLER_MODULE;
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sum2 += sum1;
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if(sum2 >= ADLER_MODULE)
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sum2 -= ADLER_MODULE;
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preSum1 = (ushort)(sum1 & 0xFFFF);
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preSum2 = (ushort)(sum2 & 0xFFFF);
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return;
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}
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/* in case short lengths are provided, keep it somewhat fast */
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case < 16:
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{
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while(len-- > 0)
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{
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sum1 += data[dataOff++];
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sum2 += sum1;
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}
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if(sum1 >= ADLER_MODULE)
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sum1 -= ADLER_MODULE;
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if(sum1 >= ADLER_MODULE)
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sum1 -= ADLER_MODULE;
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sum2 %= ADLER_MODULE; /* only added so many ADLER_MODULE's */
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preSum1 = (ushort)(sum1 & 0xFFFF);
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preSum2 = (ushort)(sum2 & 0xFFFF);
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sum2 %= ADLER_MODULE; /* only added so many ADLER_MODULE's */
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preSum1 = (ushort)(sum1 & 0xFFFF);
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preSum2 = (ushort)(sum2 & 0xFFFF);
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return;
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return;
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}
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}
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/* do length NMAX blocks -- requires just one modulo operation */
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258
CDChecksums.cs
258
CDChecksums.cs
@@ -198,158 +198,70 @@ public static class CdChecksums
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//AaruConsole.DebugWriteLine("CD checksums", "Data sector, address {0:X2}:{1:X2}:{2:X2}", channel[0x00C],
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// channel[0x00D], channel[0x00E]);
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if((channel[0x00F] & 0x03) == 0x00) // mode (1 byte)
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switch(channel[0x00F] & 0x03)
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{
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//AaruConsole.DebugWriteLine("CD checksums", "Mode 0 sector at address {0:X2}:{1:X2}:{2:X2}",
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// channel[0x00C], channel[0x00D], channel[0x00E]);
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for(var i = 0x010; i < 0x930; i++)
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if(channel[i] != 0x00)
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{
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 0 sector with error at address: {0:X2}:{1:X2}:{2:X2}",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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// mode (1 byte)
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case 0x00:
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{
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//AaruConsole.DebugWriteLine("CD checksums", "Mode 0 sector at address {0:X2}:{1:X2}:{2:X2}",
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// channel[0x00C], channel[0x00D], channel[0x00E]);
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for(var i = 0x010; i < 0x930; i++)
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if(channel[i] != 0x00)
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{
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 0 sector with error at address: {0:X2}:{1:X2}:{2:X2}",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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return false;
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}
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return false;
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}
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return true;
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}
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return true;
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}
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if((channel[0x00F] & 0x03) == 0x01) // mode (1 byte)
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{
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// mode (1 byte)
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//AaruConsole.DebugWriteLine("CD checksums", "Mode 1 sector at address {0:X2}:{1:X2}:{2:X2}",
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// channel[0x00C], channel[0x00D], channel[0x00E]);
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if(channel[0x814] != 0x00 || // reserved (8 bytes)
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channel[0x815] != 0x00 ||
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channel[0x816] != 0x00 ||
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channel[0x817] != 0x00 ||
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channel[0x818] != 0x00 ||
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channel[0x819] != 0x00 ||
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channel[0x81A] != 0x00 ||
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channel[0x81B] != 0x00)
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{
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case 0x01 when channel[0x814] != 0x00 || // reserved (8 bytes)
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channel[0x815] != 0x00 || channel[0x816] != 0x00 || channel[0x817] != 0x00 ||
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channel[0x818] != 0x00 || channel[0x819] != 0x00 || channel[0x81A] != 0x00 ||
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channel[0x81B] != 0x00:
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 1 sector with data in reserved bytes at address: {0:X2}:{1:X2}:{2:X2}",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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return false;
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}
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var address = new byte[4];
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var data = new byte[2060];
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var data2 = new byte[2232];
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var eccP = new byte[172];
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var eccQ = new byte[104];
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Array.Copy(channel, 0x0C, address, 0, 4);
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Array.Copy(channel, 0x10, data, 0, 2060);
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Array.Copy(channel, 0x10, data2, 0, 2232);
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Array.Copy(channel, 0x81C, eccP, 0, 172);
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Array.Copy(channel, 0x8C8, eccQ, 0, 104);
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bool failedEccP = !CheckEcc(address, data, 86, 24, 2, 86, eccP);
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bool failedEccQ = !CheckEcc(address, data2, 52, 43, 86, 88, eccQ);
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correctEccP = !failedEccP;
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correctEccQ = !failedEccQ;
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if(failedEccP)
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC P check",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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if(failedEccQ)
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC Q check",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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var storedEdc = BitConverter.ToUInt32(channel, 0x810);
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uint calculatedEdc = ComputeEdc(0, channel, 0x810);
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correctEdc = calculatedEdc == storedEdc;
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if(calculatedEdc == storedEdc)
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return !failedEccP && !failedEccQ;
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 1 sector at address: {0:X2}:{1:X2}:{2:X2}, got CRC 0x{3:X8} expected 0x{4:X8}",
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channel[0x00C], channel[0x00D], channel[0x00E], calculatedEdc, storedEdc);
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return false;
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}
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if((channel[0x00F] & 0x03) == 0x02) // mode (1 byte)
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{
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//AaruConsole.DebugWriteLine("CD checksums", "Mode 2 sector at address {0:X2}:{1:X2}:{2:X2}",
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// channel[0x00C], channel[0x00D], channel[0x00E]);
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var mode2Sector = new byte[channel.Length - 0x10];
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Array.Copy(channel, 0x10, mode2Sector, 0, mode2Sector.Length);
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if((channel[0x012] & 0x20) == 0x20) // mode 2 form 2
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case 0x01:
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{
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if(channel[0x010] != channel[0x014] ||
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channel[0x011] != channel[0x015] ||
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channel[0x012] != channel[0x016] ||
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channel[0x013] != channel[0x017])
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AaruConsole.DebugWriteLine("CD checksums",
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"Subheader copies differ in mode 2 form 2 sector at address: {0:X2}:{1:X2}:{2:X2}",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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var storedEdc = BitConverter.ToUInt32(mode2Sector, 0x91C);
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// No CRC stored!
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if(storedEdc == 0x00000000)
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return true;
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uint calculatedEdc = ComputeEdc(0, mode2Sector, 0x91C);
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correctEdc = calculatedEdc == storedEdc;
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if(calculatedEdc == storedEdc)
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return true;
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 form 2 sector at address: {0:X2}:{1:X2}:{2:X2}, got CRC 0x{3:X8} expected 0x{4:X8}",
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channel[0x00C], channel[0x00D], channel[0x00E], calculatedEdc, storedEdc);
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return false;
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}
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else
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{
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if(channel[0x010] != channel[0x014] ||
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channel[0x011] != channel[0x015] ||
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channel[0x012] != channel[0x016] ||
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channel[0x013] != channel[0x017])
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AaruConsole.DebugWriteLine("CD checksums",
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"Subheader copies differ in mode 2 form 1 sector at address: {0:X2}:{1:X2}:{2:X2}",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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var address = new byte[4];
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var data = new byte[2060];
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var data2 = new byte[2232];
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var eccP = new byte[172];
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var eccQ = new byte[104];
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Array.Copy(mode2Sector, 0x80C, eccP, 0, 172);
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Array.Copy(mode2Sector, 0x8B8, eccQ, 0, 104);
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Array.Copy(channel, 0x0C, address, 0, 4);
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Array.Copy(channel, 0x10, data, 0, 2060);
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Array.Copy(channel, 0x10, data2, 0, 2232);
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Array.Copy(channel, 0x81C, eccP, 0, 172);
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Array.Copy(channel, 0x8C8, eccQ, 0, 104);
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bool failedEccP = !CheckEcc(address, mode2Sector, 86, 24, 2, 86, eccP);
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bool failedEccQ = !CheckEcc(address, mode2Sector, 52, 43, 86, 88, eccQ);
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bool failedEccP = !CheckEcc(address, data, 86, 24, 2, 86, eccP);
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bool failedEccQ = !CheckEcc(address, data2, 52, 43, 86, 88, eccQ);
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correctEccP = !failedEccP;
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correctEccQ = !failedEccQ;
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if(failedEccP)
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 form 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC P check",
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"Mode 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC P check",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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if(failedEccQ)
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 form 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC Q check",
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"Mode 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC Q check",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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var storedEdc = BitConverter.ToUInt32(mode2Sector, 0x808);
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uint calculatedEdc = ComputeEdc(0, mode2Sector, 0x808);
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var storedEdc = BitConverter.ToUInt32(channel, 0x810);
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uint calculatedEdc = ComputeEdc(0, channel, 0x810);
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correctEdc = calculatedEdc == storedEdc;
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@@ -357,17 +269,105 @@ public static class CdChecksums
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return !failedEccP && !failedEccQ;
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 sector at address: {0:X2}:{1:X2}:{2:X2}, got CRC 0x{3:X8} expected 0x{4:X8}",
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"Mode 1 sector at address: {0:X2}:{1:X2}:{2:X2}, got CRC 0x{3:X8} expected 0x{4:X8}",
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channel[0x00C], channel[0x00D], channel[0x00E], calculatedEdc, storedEdc);
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return false;
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}
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// mode (1 byte)
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case 0x02:
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{
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//AaruConsole.DebugWriteLine("CD checksums", "Mode 2 sector at address {0:X2}:{1:X2}:{2:X2}",
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// channel[0x00C], channel[0x00D], channel[0x00E]);
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var mode2Sector = new byte[channel.Length - 0x10];
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Array.Copy(channel, 0x10, mode2Sector, 0, mode2Sector.Length);
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if((channel[0x012] & 0x20) == 0x20) // mode 2 form 2
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{
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if(channel[0x010] != channel[0x014] ||
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channel[0x011] != channel[0x015] ||
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channel[0x012] != channel[0x016] ||
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channel[0x013] != channel[0x017])
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AaruConsole.DebugWriteLine("CD checksums",
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"Subheader copies differ in mode 2 form 2 sector at address: {0:X2}:{1:X2}:{2:X2}",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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var storedEdc = BitConverter.ToUInt32(mode2Sector, 0x91C);
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// No CRC stored!
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if(storedEdc == 0x00000000)
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return true;
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uint calculatedEdc = ComputeEdc(0, mode2Sector, 0x91C);
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correctEdc = calculatedEdc == storedEdc;
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if(calculatedEdc == storedEdc)
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return true;
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 form 2 sector at address: {0:X2}:{1:X2}:{2:X2}, got CRC 0x{3:X8} expected 0x{4:X8}",
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channel[0x00C], channel[0x00D], channel[0x00E], calculatedEdc,
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storedEdc);
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return false;
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}
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else
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{
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if(channel[0x010] != channel[0x014] ||
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channel[0x011] != channel[0x015] ||
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channel[0x012] != channel[0x016] ||
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channel[0x013] != channel[0x017])
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AaruConsole.DebugWriteLine("CD checksums",
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"Subheader copies differ in mode 2 form 1 sector at address: {0:X2}:{1:X2}:{2:X2}",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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var address = new byte[4];
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var eccP = new byte[172];
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var eccQ = new byte[104];
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Array.Copy(mode2Sector, 0x80C, eccP, 0, 172);
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Array.Copy(mode2Sector, 0x8B8, eccQ, 0, 104);
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bool failedEccP = !CheckEcc(address, mode2Sector, 86, 24, 2, 86, eccP);
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bool failedEccQ = !CheckEcc(address, mode2Sector, 52, 43, 86, 88, eccQ);
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correctEccP = !failedEccP;
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correctEccQ = !failedEccQ;
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if(failedEccP)
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 form 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC P check",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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if(failedEccQ)
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 form 1 sector at address: {0:X2}:{1:X2}:{2:X2}, fails ECC Q check",
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channel[0x00C], channel[0x00D], channel[0x00E]);
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var storedEdc = BitConverter.ToUInt32(mode2Sector, 0x808);
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uint calculatedEdc = ComputeEdc(0, mode2Sector, 0x808);
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correctEdc = calculatedEdc == storedEdc;
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if(calculatedEdc == storedEdc)
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return !failedEccP && !failedEccQ;
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AaruConsole.DebugWriteLine("CD checksums",
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"Mode 2 sector at address: {0:X2}:{1:X2}:{2:X2}, got CRC 0x{3:X8} expected 0x{4:X8}",
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channel[0x00C], channel[0x00D], channel[0x00E], calculatedEdc,
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storedEdc);
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return false;
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}
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}
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default:
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AaruConsole.DebugWriteLine("CD checksums", "Unknown mode {0} sector at address: {1:X2}:{2:X2}:{3:X2}",
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channel[0x00F], channel[0x00C], channel[0x00D], channel[0x00E]);
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return null;
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}
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AaruConsole.DebugWriteLine("CD checksums", "Unknown mode {0} sector at address: {1:X2}:{2:X2}:{3:X2}",
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channel[0x00F], channel[0x00C], channel[0x00D], channel[0x00E]);
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return null;
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}
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static uint ComputeEdc(uint edc, IReadOnlyList<byte> src, int size)
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@@ -136,42 +136,44 @@ public sealed class Fletcher32Context : IChecksum
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uint sum2 = previousSum2;
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var dataOff = 0;
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/* in case user likes doing a byte at a time, keep it fast */
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if(len == 1)
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switch(len)
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{
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sum1 += data[dataOff];
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if(sum1 >= FLETCHER_MODULE)
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sum1 -= FLETCHER_MODULE;
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sum2 += sum1;
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if(sum2 >= FLETCHER_MODULE)
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sum2 -= FLETCHER_MODULE;
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previousSum1 = (ushort)(sum1 & 0xFFFF);
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previousSum2 = (ushort)(sum2 & 0xFFFF);
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return;
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}
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||||
/* in case short lengths are provided, keep it somewhat fast */
|
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if(len < 16)
|
||||
{
|
||||
while(len-- > 0)
|
||||
/* in case user likes doing a byte at a time, keep it fast */
|
||||
case 1:
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||||
{
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sum1 += data[dataOff++];
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sum1 += data[dataOff];
|
||||
|
||||
if(sum1 >= FLETCHER_MODULE)
|
||||
sum1 -= FLETCHER_MODULE;
|
||||
|
||||
sum2 += sum1;
|
||||
|
||||
if(sum2 >= FLETCHER_MODULE)
|
||||
sum2 -= FLETCHER_MODULE;
|
||||
|
||||
previousSum1 = (ushort)(sum1 & 0xFFFF);
|
||||
previousSum2 = (ushort)(sum2 & 0xFFFF);
|
||||
|
||||
return;
|
||||
}
|
||||
/* in case short lengths are provided, keep it somewhat fast */
|
||||
case < 16:
|
||||
{
|
||||
while(len-- > 0)
|
||||
{
|
||||
sum1 += data[dataOff++];
|
||||
sum2 += sum1;
|
||||
}
|
||||
|
||||
if(sum1 >= FLETCHER_MODULE)
|
||||
sum1 -= FLETCHER_MODULE;
|
||||
if(sum1 >= FLETCHER_MODULE)
|
||||
sum1 -= FLETCHER_MODULE;
|
||||
|
||||
sum2 %= FLETCHER_MODULE; /* only added so many FLETCHER_MODULE's */
|
||||
previousSum1 = (ushort)(sum1 & 0xFFFF);
|
||||
previousSum2 = (ushort)(sum2 & 0xFFFF);
|
||||
sum2 %= FLETCHER_MODULE; /* only added so many FLETCHER_MODULE's */
|
||||
previousSum1 = (ushort)(sum1 & 0xFFFF);
|
||||
previousSum2 = (ushort)(sum2 & 0xFFFF);
|
||||
|
||||
return;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/* do length NMAX blocks -- requires just one modulo operation */
|
||||
@@ -482,42 +484,44 @@ public sealed class Fletcher16Context : IChecksum
|
||||
uint sum2 = previousSum2;
|
||||
var dataOff = 0;
|
||||
|
||||
/* in case user likes doing a byte at a time, keep it fast */
|
||||
if(len == 1)
|
||||
switch(len)
|
||||
{
|
||||
sum1 += data[dataOff];
|
||||
|
||||
if(sum1 >= FLETCHER_MODULE)
|
||||
sum1 -= FLETCHER_MODULE;
|
||||
|
||||
sum2 += sum1;
|
||||
|
||||
if(sum2 >= FLETCHER_MODULE)
|
||||
sum2 -= FLETCHER_MODULE;
|
||||
|
||||
previousSum1 = (byte)(sum1 & 0xFF);
|
||||
previousSum2 = (byte)(sum2 & 0xFF);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
/* in case short lengths are provided, keep it somewhat fast */
|
||||
if(len < 11)
|
||||
{
|
||||
while(len-- > 0)
|
||||
/* in case user likes doing a byte at a time, keep it fast */
|
||||
case 1:
|
||||
{
|
||||
sum1 += data[dataOff++];
|
||||
sum1 += data[dataOff];
|
||||
|
||||
if(sum1 >= FLETCHER_MODULE)
|
||||
sum1 -= FLETCHER_MODULE;
|
||||
|
||||
sum2 += sum1;
|
||||
|
||||
if(sum2 >= FLETCHER_MODULE)
|
||||
sum2 -= FLETCHER_MODULE;
|
||||
|
||||
previousSum1 = (byte)(sum1 & 0xFF);
|
||||
previousSum2 = (byte)(sum2 & 0xFF);
|
||||
|
||||
return;
|
||||
}
|
||||
/* in case short lengths are provided, keep it somewhat fast */
|
||||
case < 11:
|
||||
{
|
||||
while(len-- > 0)
|
||||
{
|
||||
sum1 += data[dataOff++];
|
||||
sum2 += sum1;
|
||||
}
|
||||
|
||||
if(sum1 >= FLETCHER_MODULE)
|
||||
sum1 -= FLETCHER_MODULE;
|
||||
if(sum1 >= FLETCHER_MODULE)
|
||||
sum1 -= FLETCHER_MODULE;
|
||||
|
||||
sum2 %= FLETCHER_MODULE; /* only added so many FLETCHER_MODULE's */
|
||||
previousSum1 = (byte)(sum1 & 0xFF);
|
||||
previousSum2 = (byte)(sum2 & 0xFF);
|
||||
sum2 %= FLETCHER_MODULE; /* only added so many FLETCHER_MODULE's */
|
||||
previousSum1 = (byte)(sum1 & 0xFF);
|
||||
previousSum2 = (byte)(sum2 & 0xFF);
|
||||
|
||||
return;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/* do length NMAX blocks -- requires just one modulo operation */
|
||||
|
||||
@@ -169,11 +169,13 @@ public sealed class SpamSumContext : IChecksum
|
||||
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
||||
void fuzzy_try_fork_blockhash()
|
||||
{
|
||||
if(_self.Bhend >= NUM_BLOCKHASHES)
|
||||
return;
|
||||
switch(_self.Bhend)
|
||||
{
|
||||
case >= NUM_BLOCKHASHES: return;
|
||||
|
||||
if(_self.Bhend == 0) // assert
|
||||
throw new Exception("Assertion failed");
|
||||
// assert
|
||||
case 0: throw new Exception("Assertion failed");
|
||||
}
|
||||
|
||||
uint obh = _self.Bhend - 1;
|
||||
uint nbh = _self.Bhend;
|
||||
|
||||
Reference in New Issue
Block a user