Please, help us to better serve our user community by answering the following short survey: https://www.hdfgroup.org/website-survey/
HDF5 1.14.5
API Reference
Loading...
Searching...
No Matches
HDF5 Predefined Datatypes

HDF5 Predefined Datatypes

The following datatypes are predefined in HDF5.

Predefined IEEE Floating Point Datatypes
Datatype Description
H5T_IEEE_F16BE 16-bit big-endian IEEE floating point
H5T_IEEE_F16LE 16-bit little-endian IEEE floating point
H5T_IEEE_F32BE 32-bit big-endian IEEE floating point
H5T_IEEE_F32LE 32-bit little-endian IEEE floating point
H5T_IEEE_F64BE 64-bit big-endian IEEE floating point
H5T_IEEE_F64LE 64-bit little-endian IEEE floating point
Predefined Standard Datatypes
Datatype Description
H5T_STD_I8BE 8-bit big-endian signed integer (2's complement)
H5T_STD_I8LE 8-bit little-endian signed integer (2's complement)
H5T_STD_I16BE 16-bit big-endian signed integer (2's complement)
H5T_STD_I16LE 16-bit little-endian signed integer (2's complement)
H5T_STD_I32BE 32-bit big-endian signed integer (2's complement)
H5T_STD_I32LE 32-bit little-endian signed integer (2's complement)
H5T_STD_I64BE 64-bit big-endian signed integer (2's complement)
H5T_STD_I64LE 64-bit little-endian signed integer (2's complement)
H5T_STD_U8BE 8-bit big-endian unsigned integer
H5T_STD_U8LE 8-bit little-endian unsigned integer
H5T_STD_U16BE 16-bit big-endian unsigned integer
H5T_STD_U16LE 16-bit little-endian unsigned integer
H5T_STD_U32BE 32-bit big-endian unsigned integer
H5T_STD_U32LE 32-bit little-endian unsigned integer
H5T_STD_U64BE 64-bit big-endian unsigned integer
H5T_STD_U64LE 64-bit little-endian unsigned integer
H5T_STD_B8BE 8-bit big-endian bitfield
H5T_STD_B8LE 8-bit little-endian bitfield
H5T_STD_B16BE 16-bit big-endian bitfield
H5T_STD_B16LE 16-bit little-endian bitfield
H5T_STD_B32BE 32-bit big-endian bitfield
H5T_STD_B32LE 32-bit little-endian bitfield
H5T_STD_B64BE 64-bit big-endian bitfield
H5T_STD_B64LE 64-bit little-endian bitfield
H5T_STD_REF_OBJ Object reference
H5T_STD_REF_DSETREG Dataset region reference
H5T_STD_REF Generic reference
Predefined UNIX-specific Datatypes
Datatype Description
H5T_UNIX_D32BE 32-bit big-endian
H5T_UNIX_D32LE 32-bit little-endian
H5T_UNIX_D64BE 64-bit big-endian
H5T_UNIX_D64LE 64-bit little-endian
Predefined String Datatypes
Datatype Description
H5T_C_S1 String datatype in C (size defined in bytes rather than in bits)
H5T_FORTRAN_S1 String datatype in Fortran (as defined for the HDF5 C library)
Predefined Intel-specific Datatypes
Datatype Description
H5T_INTEL_I8 8-bit little-endian signed integer (2's complement)
H5T_INTEL_I16 16-bit little-endian signed integer (2's complement)
H5T_INTEL_I32 32-bit little-endian signed integer (2's complement)
H5T_INTEL_I64 64-bit little-endian signed integer (2's complement)
H5T_INTEL_U8 8-bit little-endian unsigned integer
H5T_INTEL_U16 16-bit little-endian unsigned integer
H5T_INTEL_U32 32-bit little-endian unsigned integer
H5T_INTEL_U64 64-bit little-endian unsigned integer
H5T_INTEL_B8 8-bit little-endian bitfield
H5T_INTEL_B16 16-bit little-endian bitfield
H5T_INTEL_B32 32-bit little-endian bitfield
H5T_INTEL_B64 64-bit little-endian bitfield
H5T_INTEL_F32 32-bit little-endian IEEE floating point
H5T_INTEL_F64 64-bit little-endian IEEE floating point
Predefined DEC Alpha-specific Datatypes
Datatype Description
H5T_ALPHA_I8 8-bit little-endian signed integer (2's complement)
H5T_ALPHA_I16 16-bit little-endian signed integer (2's complement)
H5T_ALPHA_I32 32-bit little-endian signed integer (2's complement)
H5T_ALPHA_I64 64-bit little-endian signed integer (2's complement)
H5T_ALPHA_U8 8-bit little-endian unsigned integer
H5T_ALPHA_U16 16-bit little-endian unsigned integer
H5T_ALPHA_U32 32-bit little-endian unsigned integer
H5T_ALPHA_U64 64-bit little-endian unsigned integer
H5T_ALPHA_B8 8-bit little-endian bitfield
H5T_ALPHA_B16 16-bit little-endian bitfield
H5T_ALPHA_B32 32-bit little-endian bitfield
H5T_ALPHA_B64 64-bit little-endian bitfield
H5T_ALPHA_F32 32-bit little-endian IEEE floating point
H5T_ALPHA_F64 64-bit little-endian IEEE floating point
Predefined MIPS-specific Datatypes
Datatype Description
H5T_MIPS_I8 8-bit big-endian signed integer (2's complement)
H5T_MIPS_I16 16-bit big-endian signed integer (2's complement)
H5T_MIPS_I32 32-bit big-endian signed integer (2's complement)
H5T_MIPS_I64 64-bit big-endian signed integer (2's complement)
H5T_MIPS_U8 8-bit big-endian unsigned integer
H5T_MIPS_U16 16-bit big-endian unsigned integer
H5T_MIPS_U32 32-bit big-endian unsigned integer
H5T_MIPS_U64 64-bit big-endian unsigned integer
H5T_MIPS_B8 8-bit big-endian bitfield
H5T_MIPS_B16 16-bit big-endian bitfield
H5T_MIPS_B32 32-bit big-endian bitfield
H5T_MIPS_B64 64-bit big-endian bitfield
H5T_MIPS_F32 32-bit big-endian IEEE floating point
H5T_MIPS_F64 64-bit big-endian IEEE floating point
Predefined Native Datatypes
Datatype Description
H5T_NATIVE_CHAR C-style char
H5T_NATIVE_SCHAR C-style signed char
H5T_NATIVE_UCHAR C-style unsigned signed char
H5T_NATIVE_SHORT C-style short
H5T_NATIVE_USHORT C-style unsigned short
H5T_NATIVE_INT C-style int
H5T_NATIVE_UINT C-style unsigned int
H5T_NATIVE_LONG C-style long
H5T_NATIVE_ULONG C-style unsigned long
H5T_NATIVE_LLONG C-style long long
H5T_NATIVE_ULLONG C-style unsigned long long
H5T_NATIVE_FLOAT16 C-style _Float16 (May be H5I_INVALID_HID if platform doesn't support _Float16 type)
H5T_NATIVE_FLOAT C-style float
H5T_NATIVE_DOUBLE C-style double
H5T_NATIVE_LDOUBLE C-style long double
H5T_NATIVE_B8 8-bit bitfield based on native types
H5T_NATIVE_B16 16-bit bitfield based on native types
H5T_NATIVE_B32 32-bit bitfield based on native types
H5T_NATIVE_B64 64-bit bitfield based on native types
H5T_NATIVE_OPAQUE opaque unit based on native types
H5T_NATIVE_HADDR address type based on native types
H5T_NATIVE_HSIZE size type based on native types
H5T_NATIVE_HSSIZE signed size type based on native types
H5T_NATIVE_HERR error code type based on native types
H5T_NATIVE_HBOOL Boolean type based on native types
Predefined ANSI C9x-specific Native Integer Datatypes
Datatype Description
H5T_NATIVE_INT8 8-bit signed integer (2's complement)
H5T_NATIVE_UINT8 8-bit unsigned integer
H5T_NATIVE_INT_LEAST8 8-bit signed integer (2's complement) with storage to use least amount of space
H5T_NATIVE_UINT_LEAST8 8-bit unsigned integer with storage to use least amount of space
H5T_NATIVE_INT_FAST8 8-bit signed integer (2's complement) with storage to maximize performance
H5T_NATIVE_UINT_FAST8 8-bit unsigned integer with storage to maximize performance
H5T_NATIVE_INT16 16-bit signed integer (2's complement)
H5T_NATIVE_UINT16 16-bit unsigned integer
H5T_NATIVE_INT_LEAST16 16-bit signed integer (2's complement) with storage to use least amount of space
H5T_NATIVE_UINT_LEAST16 16-bit unsigned integer with storage to use least amount of space
H5T_NATIVE_INT_FAST16 16-bit signed integer (2's complement) with storage to maximize performance
H5T_NATIVE_UINT_FAST16 16-bit unsigned integer with storage to maximize performance
H5T_NATIVE_INT32 32-bit signed integer (2's complement)
H5T_NATIVE_UINT32 32-bit unsigned integer
H5T_NATIVE_INT_LEAST32 32-bit signed integer (2's complement) with storage to use least amount of space
H5T_NATIVE_UINT_LEAST32 32-bit unsigned integer with storage to use least amount of space
H5T_NATIVE_INT_FAST32 32-bit signed integer (2's complement) with storage to maximize performance
H5T_NATIVE_UINT_FAST32 32-bit unsigned integer with storage to maximize performance
H5T_NATIVE_INT64 64-bit signed integer (2's complement)
H5T_NATIVE_UINT64 64-bit unsigned integer
H5T_NATIVE_INT_LEAST64 64-bit signed integer (2's complement) with storage to use least amount of space
H5T_NATIVE_UINT_LEAST64 64-bit unsigned integer with storage to use least amount of space
H5T_NATIVE_INT_FAST64 64-bit signed integer (2's complement) with storage to maximize performance
H5T_NATIVE_UINT_FAST64 64-bit unsigned integer with storage to maximize performance