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Накопленные изменения одним коммитом #31

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Накопленные изменения одним коммитом #31

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19 changes: 8 additions & 11 deletions src/NGrib/BadGribFormatException.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,23 +24,20 @@
* along with NGrib. If not, see <https://www.gnu.org/licenses/>.
*/

using System;
namespace NGrib;

namespace NGrib
/// <summary>
/// The exception that is thrown when the read stream does not
/// respect the GRIB 2 data format.
/// </summary>
public class BadGribFormatException : Exception
{
/// <summary>
/// The exception that is thrown when the read stream does not
/// respect the GRIB 2 data format.
/// </summary>
public class BadGribFormatException : Exception
{
/// <summary>
/// Initializes a new instance of the <see cref="BadGribFormatException"/> class
/// with a specified error message.
/// </summary>
/// <param name="message">The message that describes the error.</param>
public BadGribFormatException(string message) : base(message)
{
}
}
{
}
}
124 changes: 61 additions & 63 deletions src/NGrib/BigEndianBitConverter.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -24,77 +24,75 @@
* along with NGrib. If not, see <https://www.gnu.org/licenses/>.
*/

using System;
using System.Numerics;

namespace NGrib
namespace NGrib;

internal static class BigEndianBitConverter
{
internal static class BigEndianBitConverter
{
public const int Int8MinValue = -127;
public const int Int32MinValue = -2147483647;
public const int Int8MinValue = -127;
public const int Int32MinValue = -2147483647;

public static int ToInt8(byte[] data, int startIndex) => ToInt8(data[startIndex]);
public static int ToInt8(byte[] data, int startIndex) => ToInt8(data[startIndex]);

public static int ToInt8(byte data) => (1 - ((data & 128) >> 6)) * (data & 127);
public static int ToInt8(byte data) => (1 - ((data & 128) >> 6)) * (data & 127);

public static int ToUInt16(byte[] data, int startIndex)
{
var index = startIndex;
return (data[index++] << 8) | data[index];
}
public static int ToUInt16(byte[] data, int startIndex)
{
var index = startIndex;
return (data[index++] << 8) | data[index];
}

public static int ToInt16(byte[] data, int startIndex)
{
var index = startIndex;
return (1 - ((data[index] & 128) >> 6)) * ((data[index++] & 127) << 8 | data[index]);
}
public static int ToInt16(byte[] data, int startIndex)
{
var index = startIndex;
return (1 - ((data[index] & 128) >> 6)) * ((data[index++] & 127) << 8 | data[index]);
}

public static long ToUInt32(byte[] data, int startIndex)
{
var index = startIndex;
return ((uint) data[index++] << 24) |
((uint) data[index++] << 16) |
((uint) data[index++] << 8) |
data[index];
}
public static long ToUInt32(byte[] data, int startIndex)
{
var index = startIndex;
return ((uint) data[index++] << 24) |
((uint) data[index++] << 16) |
((uint) data[index++] << 8) |
data[index];
}

public static BigInteger ToUInt64(byte[] data, int startIndex)
{
var index = startIndex;
return ((ulong) data[index++] << 56) |
((ulong) data[index++] << 48) |
((ulong) data[index++] << 40) |
((ulong) data[index++] << 32) |
((ulong) data[index++] << 24) |
((ulong) data[index++] << 16) |
((ulong) data[index++] << 8) |
data[index];
}
public static BigInteger ToUInt64(byte[] data, int startIndex)
{
var index = startIndex;
return ((ulong) data[index++] << 56) |
((ulong) data[index++] << 48) |
((ulong) data[index++] << 40) |
((ulong) data[index++] << 32) |
((ulong) data[index++] << 24) |
((ulong) data[index++] << 16) |
((ulong) data[index++] << 8) |
data[index];
}

public static int ToInt32(byte[] data, int startIndex)
{
var index = startIndex;
return (1 - ((data[index] & 128) >> 6)) * ((data[index++] & 127) << 24 |
data[index++] << 16 |
data[index++] << 8 |
data[index]);
}
public static int ToInt32(byte[] data, int startIndex)
{
var index = startIndex;
return (1 - ((data[index] & 128) >> 6)) * ((data[index++] & 127) << 24 |
data[index++] << 16 |
data[index++] << 8 |
data[index]);
}

public static float ToSingle(byte[] data, int startIndex)
{
if (BitConverter.IsLittleEndian)
{
var reversedBytes = new[]
{
data[startIndex+3],
data[startIndex+2],
data[startIndex+1],
data[startIndex]
};
return BitConverter.ToSingle(reversedBytes, 0);
}
return BitConverter.ToSingle(data, startIndex);
}
}
}
public static float ToSingle(byte[] data, int startIndex)
{
if (BitConverter.IsLittleEndian)
{
var reversedBytes = new[]
{
data[startIndex+3],
data[startIndex+2],
data[startIndex+1],
data[startIndex]
};
return BitConverter.ToSingle(reversedBytes, 0);
}
return BitConverter.ToSingle(data, startIndex);
}
}
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