/// <summary>
/// Initializes a new instance of the <see cref="GribFile" /> class. File read rights are shared between processes.
/// </summary>
/// <param name="fileName">Name of the file.</param>
/// <exception cref="System.IO.IOException">Could not open file. See inner exception for more detail.</exception>
/// <exception cref="System.IO.FileLoadException">The file is empty.</exception>
public GribFile(string fileName)
{
FileInfo fi = new FileInfo(fileName);
// need a better check
if (fi.Length < 4)
{
throw new FileLoadException("This file is empty or invalid.");
}
_pFileHandleProxy = GribApiNative.CreateFileHandleProxy(fileName);
if (_pFileHandleProxy == IntPtr.Zero)
{
throw new IOException("Could not open file. See inner exception for more detail.", new Win32Exception(Marshal.GetLastWin32Error()));
}
_fileHandleProxy = (FileHandleProxy)Marshal.PtrToStructure(_pFileHandleProxy, typeof(FileHandleProxy));
FileName = fileName;
Reference = new HandleRef(this, _fileHandleProxy.File);
Context = GribApiProxy.GribContextGetDefault();
// set the message count here; the result seems to be connected to the message iterator so
// that after you begin iterating messages, the count decreases until it reaches 1.
int count = 0;
GribApiProxy.GribCountInFile(Context, this, out count);
MessageCount = count;
}
/// <summary>
///
/// </summary>
/// <param name="bits"></param>
/// <param name="index"></param>
/// <param name="ctx"></param>
/// <returns></returns>
public static GribMessage Create(byte[] bits, int index, GribContext ctx)
{
var buff = Marshal.AllocHGlobal(bits.Length);
Marshal.Copy(bits, 0, buff, bits.Length);
int err = 0;
SizeT sz = (SizeT)bits.Length;
GribMessage msg = null;
GribHandle handle = null;
lock (_fileLock)
{
// grib_api moves to the next message in a stream for each new handle
handle = GribApiProxy.GribHandleNewFromMultiMessage(ctx, out buff, ref sz, out err);
}
if (err != 0)
{
Marshal.AllocHGlobal(buff);
throw GribApiException.Create(err);
}
if (handle != null)
{
msg = new GribMessage(handle, ctx, buff, index);
}
return(msg);
}
/// <summary>
/// Called when [dispose].
/// </summary>
/// <param name="disposing"><c>true</c> to release both managed and unmanaged resources; <c>false</c> to release only unmanaged resources.</param>
protected override void OnDispose(bool disposing)
{
if (this.pReference != IntPtr.Zero)
{
this.Rewind();
GribApiProxy.GribKeysIteratorDelete(this);
}
}
/// <summary>
/// Gets an enum describing a key's representation within the message.
/// </summary>
/// <param name="key">The key.</param>
/// <returns></returns>
private GribValueType NativeTypeForKey(string key)
{
int type = 0;
GribApiProxy.GribGetNativeType(_handle, key, out type);
return((GribValueType)type);
}
/// <summary>
/// Sets the key's value in bytes.
/// </summary>
/// <param name="newBytes">The new bytes.</param>
public void AsBytes(byte[] newBytes)
{
AssertTypeSafe(GribValueType.Bytes);
SizeT sz = (SizeT)newBytes.Length;
GribApiProxy.GribSetBytes(_handle, Key, newBytes, ref sz);
}
/// <summary>
/// Sets the key's value.
/// </summary>
/// <param name="newValue">The new value.</param>
public virtual void AsString(string newValue)
{
AssertTypeSafe(GribValueType.String);
SizeT len = (SizeT)newValue.Length;
GribApiProxy.GribSetString(_handle, Key, newValue, ref len);
}
/// <summary>
/// Sets the key's value.
/// </summary>
/// <param name="newValue">The new value.</param>
public virtual void AsDouble(double newValue)
{
string valueKey = BuildTokenForDouble();
AssertTypeSafe(valueKey, NativeTypeForKey(valueKey), GribValueType.Double);
GribApiProxy.GribSetDouble(_handle, valueKey, newValue);
}
/// <summary>
/// Retrieves the GRIB key's type name.
/// </summary>
/// <param name="vt">The vt.</param>
/// <returns></returns>
public static string AsString(this GribValueType vt)
{
if ((int)vt >= (int)GribValueType.IntArray)
{
return(vt.ToString());
}
return(GribApiProxy.GribGetTypeName((int)vt));
}
/// <summary>
/// Gets the next value in a series.
/// </summary>
/// <param name="isMissingFlag">The is missing flag.</param>
/// <param name="gsVal">The gs value.</param>
/// <returns>False if there are no more values.</returns>
public bool Next(double isMissingFlag, out GridCoordinateValue gsVal)
{
double lat, lon, val;
bool success = GribApiProxy.GribIteratorNext(this, out lat, out lon, out val) != 0;
gsVal = new GridCoordinateValue(lat, lon, val, val == isMissingFlag);
return(success);
}
protected override void OnDispose(bool disposing)
{
if (this.pReference != IntPtr.Zero)
{
GribApiProxy.GribNearestDelete(Nearest);
this.Nearest = null;
this.Handle = null;
}
}
/// <summary>
/// Gets the key's value.
/// </summary>
/// <returns></returns>
public virtual int AsInt()
{
AssertTypeSafe(GribValueType.Int);
int val;
GribApiProxy.GribGetLong(_handle, Key, out val);
return(val);
}
/// <summary>
/// Gets the key's value.
/// </summary>
/// <returns></returns>
public virtual double AsDouble()
{
string valueKey = BuildTokenForDouble();
AssertTypeSafe(valueKey, NativeTypeForKey(valueKey), GribValueType.Double);
double val;
GribApiProxy.GribGetDouble(_handle, valueKey, out val);
return(val);
}
/// <summary>
/// Creates an instance of GribValuesIterator.
/// </summary>
/// <param name="h">The handle of the message to iterate.</param>
/// <param name="filters">The filters.</param>
/// <returns></returns>
public static GribCoordinateValuesIterator Create(GribHandle h, uint filters)
{
int err = 0;
GribCoordinateValuesIterator iter = GribApiProxy.GribIteratorNew(h, filters, out err);
if (err != 0)
{
throw GribApiException.Create(err);
}
return(iter);
}
///// <summary>
///// Find the nearest point of a set of points whose latitudes and longitudes.
///// </summary>
///// <param name="coordinates">The reference coordinates.</param>
///// <param name="useLandSeaMask">If true, the nearest land point is returned and the grib passed as the handle is considered a land sea mask.
///// land nearest point is the nearest point with land sea mask value>=0.5. If no nearest land points are found the nearest value is returned.
///// If the flag false, the nearest points, along with values, distances, and indexes are returned.
///// </param>
///// <returns></returns>
//public GribNearestCoordinate[] FindNearestCoordinates(IGeoCoordinate[] coordinates, bool useLandSeaMask = false)
//{
// var len = coordinates.Length;
// var latitudes = new double[len];
// var longitudes = new double[len];
// var outLatitudes = new double[len];
// var outLongitudes = new double[len];
// var distances = new double[len];
// var values = new double[len];
// var indexes = new int[len];
// for (var i = 0; i < len; i++)
// {
// latitudes[i] = coordinates[i].Latitude;
// longitudes[i] = coordinates[i].Longitude;
// }
// Interop.SizeT sz = (SizeT)len;
// Interop.SWIG.GribApiProxy.GribNearestFindMultiple(this.Handle, useLandSeaMask ? 1 : 0, latitudes, longitudes, len,
// outLatitudes, outLongitudes, values, distances, indexes);
// var vals = new GribNearestCoordinate[len];
// for (var i = 0; i < len; i++)
// {
// vals[i] = new GribNearestCoordinate(latitudes[i], longitudes[i], values[i], distances[i], indexes[i]);
// }
// Array.Sort(vals, (v1, v2) => v1.Distance.CompareTo(v2.Distance));
// return vals;
//}
public static GribNearest Create(GribHandle handle)
{
int err = 0;
var nearest = GribApiProxy.GribNearestNew(handle, out err);
if (err != 0)
{
throw GribApiException.Create(err);
}
return(new GribNearest(nearest, handle));
}
/// <summary>
/// Sets the key's value.
/// </summary>
/// <param name="newValues">The new values.</param>
/// <param name="force">if set to <c>true</c> [force].</param>
public virtual void AsDoubleArray(double[] newValues, bool force = false)
{
if (force)
{
GribApiProxy.GribSetForceDoubleArray(_handle, Key, newValues, (SizeT)newValues.Length);
}
else
{
AssertTypeSafe(GribValueType.DoubleArray);
GribApiProxy.GribSetDoubleArray(_handle, Key, newValues, (SizeT)newValues.Length);
}
}
/// <summary>
/// Gets the key's value in bytes.
/// </summary>
/// <returns></returns>
public byte[] AsBytes()
{
AssertTypeSafe(GribValueType.Bytes);
SizeT sz = 0;
GribApiProxy.GribGetSize(_handle, Key, ref sz);
byte[] bytes = new byte[sz];
GribApiProxy.GribGetBytes(_handle, Key, bytes, ref sz);
return(bytes);
}
/// <summary>
/// Gets a copy of the key's array value. Changing the values of this array does not affect the owning message.
/// Call ::AsXArray(alteredArray) to set new values.
/// </summary>
/// <returns>Returns a *copy* of the key's array.</returns>
public virtual int[] AsIntArray()
{
AssertTypeSafe(GribValueType.IntArray);
SizeT sz = 0;
GribApiProxy.GribGetSize(_handle, Key, ref sz);
int[] values = new int[sz];
GribApiProxy.GribGetLongArray(_handle, Key, values, ref sz);
return(values);
}
/// <summary>
/// Gets a copy of the key's array value. Changing the values of this array does not affect the owning message.
/// Call ::AsXArray(alteredArray) to set new values.
/// </summary>
/// <returns>Returns a *copy* of the key's array.</returns>
public virtual double[] AsDoubleArray()
{
AssertTypeSafe(GribValueType.DoubleArray);
SizeT sz = 0;
GribApiProxy.GribGetSize(_handle, Key, ref sz);
double[] values = new double[sz];
GribApiProxy.GribGetDoubleArray(_handle, Key, values, ref sz);
return(values);
}
/// <summary>
/// Gets the key's value.
/// </summary>
/// <param name="inDegrees">if set to <c>true</c>, GribApi.NET will return the value [in degrees] when possible.</param>
/// <returns></returns>
public virtual double AsDouble(bool inDegrees = true)
{
string valueKey = BuildTokenForDouble(inDegrees);
AssertTypeSafe(valueKey, NativeTypeForKey(valueKey), GribValueType.Double);
if (!IsDefined)
{
return(Double.NaN);
}
double val;
GribApiProxy.GribGetDouble(_handle, valueKey, out val);
return(val);
}
/// <summary>
/// Creates a GribMessage instance from a <seealso cref="Grib.Api.GribFile"/>.
/// </summary>
/// <param name="file">The file.</param>
/// <param name="index">The index.</param>
/// <returns></returns>
public static GribMessage Create(GribFile file, int index)
{
GribMessage msg = null;
int err = 0;
// grib_api moves to the next message in a stream for each new handle
GribHandle handle = GribApiProxy.GribHandleNewFromFile(file.Context, file, out err);
if (err != 0)
{
throw GribApiException.Create(err);
}
if (handle != null)
{
msg = new GribMessage(handle, file.Context, index);
}
return(msg);
}
/// <summary>
/// Initializes a new instance of the <see cref="GribBox"/> class.
/// </summary>
/// <param name="msgHandle">The MSG handle.</param>
/// <param name="nw">The nw.</param>
/// <param name="se">The se.</param>
public GribBox(GribHandle msgHandle, GeoCoordinate nw, GeoCoordinate se)
{
int err;
var box = GribApiProxy.GribBoxNew(msgHandle, out err);
if (err != 0)
{
throw GribApiException.Create(err);
}
var pts = GribApiProxy.GribBoxGetPoints(box, nw.Latitude, nw.Longitude, se.Latitude, se.Longitude, out err);
if (err != 0)
{
throw GribApiException.Create(err);
}
_points = new GribPoints(SWIGTYPE_p_grib_points.getCPtr(pts).Handle, false);
}
public bool disposedValue = false; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
disposedValue = true;
if (this._nearest != null)
{
this._nearest.Dispose();
}
if (this.BufferHandle.IsAllocated)
{
SWIGTYPE_p_grib_multi_handle mh = new SWIGTYPE_p_grib_multi_handle(this.Handle.Reference.Handle, false);
GribApiProxy.GribMultiHandleDelete(mh);
this.BufferHandle.Free();
}
}
}
public bool disposedValue = false; // To detect redundant calls
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
disposedValue = true;
if (this._nearest != null)
{
this._nearest.Dispose();
}
if (this.OwnsMemory)
{
SWIGTYPE_p_grib_multi_handle mh = new SWIGTYPE_p_grib_multi_handle(this.Handle.Reference.Handle, false);
GribApiProxy.GribMultiHandleDelete(mh);
// Marshal.FreeHGlobal(this.NativeBuffer);
this.NativeBuffer = IntPtr.Zero;
}
}
}
/// <summary>
/// Gets the key's value.
/// </summary>
/// <returns></returns>
public virtual string AsString()
{
if (!IsDefined || _asStringBlacklist.Contains(NativeType))
{
return(String.Empty);
}
SizeT ptLen = 0;
string valueKey = Key;
if (CanConvertToDegrees)
{
valueKey = BuildTokenForDouble();
}
// not sure it's worth checking the length here--could just use MAX_VAL_LEN
GribApiProxy.GribGetLength(_handle, valueKey, ref ptLen);
StringBuilder msg = new StringBuilder((int)ptLen);
GribApiProxy.GribGetString(_handle, valueKey, msg, ref ptLen);
return(msg.ToString().Trim());
}
/// <summary>
/// Creates a GribMessage instance from a buffer.
/// </summary>
/// <param name="bits"></param>
/// <param name="index"></param>
/// <returns></returns>
public static GribMessage Create(byte[] bits, int index = 0)
{
GCHandle h = GCHandle.Alloc(bits, GCHandleType.Pinned);
IntPtr pHandle = h.AddrOfPinnedObject();
int err = 0;
SizeT sz = (SizeT)bits.Length;
GribHandle handle = GribApiProxy.GribHandleNewFromMultiMessage(GribContext.Default, out pHandle, ref sz, out err);
if (err != 0)
{
h.Free();
throw GribApiException.Create(err);
}
GribMessage msg = null;
if (handle != null)
{
msg = new GribMessage(handle, GribContext.Default, h, index);
}
return(msg);
}
/// <summary>
/// Creates an instance of GribKeysIterator.
/// </summary>
/// <param name="handle">The handle of the message to iterate.</param>
/// <param name="filters">The key filters.</param>
/// <param name="nspace">The namespace of the keys to iterate.</param>
/// <returns></returns>
public static GribKeysIterator Create(GribHandle handle, uint filters, string nspace)
{
return(GribApiProxy.GribKeysIteratorNew(handle, filters, nspace));
}
/// <summary>
/// Rewinds this instance.
/// </summary>
public void Rewind()
{
GribApiProxy.GribKeysIteratorRewind(this);
}
/// <summary>
/// Return true if the key name exists (is defined) in the grib message.
/// </summary>
/// <param name="handle"></param>
/// <param name="keyName"></param>
/// <returns></returns>
public static bool IsKeyDefined(GribHandle handle, string keyName)
{
return(GribApiProxy.GribIsDefined(handle, keyName));
}
/// <summary>
/// Sets the key's value.
/// </summary>
/// <param name="newValue">The new value.</param>
public virtual void AsInt(int newValue)
{
AssertTypeSafe(GribValueType.Int);
GribApiProxy.GribSetLong(_handle, Key, newValue);
}
/// <summary>
/// Sets the key's value.
/// </summary>
/// <param name="newValues">The new values.</param>
public virtual void AsIntArray(int[] newValues)
{
AssertTypeSafe(GribValueType.IntArray);
GribApiProxy.GribSetLongArray(_handle, Key, newValues, (SizeT)newValues.Length);
}
