public static bool WriteStringAttribute(hid_t hid, string key, string value, bool utf8 = true, bool variable = true) { if (H5A.exists(hid, key) == 0) { // Attribute doesn't exist. return(variable ? CreateOrOverwriteVariableStringAttribute(hid, key, new string[] { value }, utf8) : CreateOrOverwriteFixedStringAttribute(hid, key, value, utf8)); } else { var attribute = H5A.open(hid, key); if (attribute < 0) { return(false); } var type = H5A.get_type(attribute); if (type < 0) { H5A.close(attribute); return(false); } var typeClass = H5T.get_class(type); if (typeClass == H5T.class_t.NO_CLASS) { H5T.close(type); H5T.close(attribute); return(false); } if (typeClass != H5T.class_t.STRING) { H5T.close(type); H5T.close(attribute); throw new ArgumentException("H5T.get_class(type) != H5T.class_t.STRING"); } utf8 = H5T.get_cset(type) == H5T.cset_t.UTF8; bool ok; if (H5T.is_variable_str(type) > 0) { ok = CreateOrOverwriteVariableStringAttribute(hid, key, new string[] { value }, utf8); } else { ok = CreateOrOverwriteFixedStringAttribute(hid, key, value, utf8); } H5T.close(type); H5T.close(attribute); return(ok); } }
public static string ReadStringAttribute(hid_t hid, string key) { var attribute = H5A.open(hid, key); if (attribute < 0) { throw new ArgumentException(string.Format("Attribute {0} not found.", key)); } var type = H5A.get_type(attribute); if (type < 0) { H5A.close(attribute); throw new Exception("H5A.get_type failed."); } var typeClass = H5T.get_class(type); if (typeClass != H5T.class_t.STRING) { H5T.close(type); throw new Exception("Not a string attribute"); } var utf8 = H5T.get_cset(type) == H5T.cset_t.UTF8; var ascii = H5T.get_cset(type) == H5T.cset_t.ASCII; if (!utf8 && !ascii) { H5T.close(type); H5A.close(attribute); throw new Exception("Neither ASCII nor UTF8."); } var isVariableString = H5T.is_variable_str(type); if (isVariableString < 0) { H5T.close(type); H5A.close(attribute); throw new Exception("H5T.is_variable_str failed"); } if (isVariableString > 0) { var space = H5A.get_space(attribute); if (space < 0) { H5T.close(type); H5A.close(attribute); throw new Exception("H5A.get_space failed."); } hid_t count = H5S.get_simple_extent_npoints(space); var rdata = new IntPtr[count]; H5A.read(attribute, type, new PinnedObject(rdata)); var attrStrings = new List <string>(); for (int i = 0; i < rdata.Length; ++i) { int attrLength = 0; while (Marshal.ReadByte(rdata[i], attrLength) != 0) { ++attrLength; } byte[] buffer = new byte[attrLength]; Marshal.Copy(rdata[i], buffer, 0, buffer.Length); string part = utf8 ? Encoding.UTF8.GetString(buffer) : Encoding.ASCII.GetString(buffer); attrStrings.Add(part); H5.free_memory(rdata[i]); } H5S.close(space); H5T.close(type); H5A.close(attribute); return(attrStrings[0]); } // Must be a non-variable length string. var size = H5T.get_size(type).ToInt32(); var unmanagedBuffer = new UnmanagedBuffer(size); int result = H5A.read(attribute, type, unmanagedBuffer); if (result < 0) { H5T.close(type); H5D.close(attribute); throw new IOException("Failed to read attribute."); } var bytes = new byte[size]; unmanagedBuffer.CopyTo(bytes, 0, bytes.Length); H5T.close(type); H5A.close(attribute); var value = utf8 ? Encoding.UTF8.GetString(bytes) : Encoding.ASCII.GetString(bytes); return(value.TrimEnd('\0')); }