Read data from the stream made by D4StreamMarshaller. More...
#include <D4StreamUnMarshaller.h>
Public Member Functions | |
| D4StreamUnMarshaller (istream &in, bool twiddle_bytes) | |
| Build a DAP4 Stream unMarshaller. More... | |
| D4StreamUnMarshaller (istream &in) | |
| virtual void | dump (ostream &strm) const |
| dump the contents of this object to the specified ostream More... | |
| virtual void | get_byte (dods_byte &val) |
| Crc32::checksum | get_checksum () |
| string | get_checksum_str () |
| int64_t | get_count () |
| virtual void | get_float32 (dods_float32 &val) |
| virtual void | get_float64 (dods_float64 &val) |
| virtual void | get_int (int &) |
| virtual void | get_int16 (dods_int16 &val) |
| virtual void | get_int32 (dods_int32 &val) |
| virtual void | get_int64 (dods_int64 &val) |
| virtual void | get_int8 (dods_int8 &val) |
| virtual void | get_opaque (char *, unsigned int) |
| virtual void | get_opaque_dap4 (char **val, int64_t &len) |
| virtual void | get_opaque_dap4 (vector< uint8_t > &val) |
| virtual void | get_str (string &val) |
| virtual void | get_uint16 (dods_uint16 &val) |
| virtual void | get_uint32 (dods_uint32 &val) |
| virtual void | get_uint64 (dods_uint64 &val) |
| virtual void | get_url (string &val) |
| virtual void | get_vector (char **, unsigned int &, Vector &) |
| virtual void | get_vector (char **, unsigned int &, int, Vector &) |
| virtual void | get_vector (char *val, int64_t num_bytes) |
| virtual void | get_vector (char *val, int64_t num_elem, int elem_size) |
| virtual void | get_vector_float32 (char *val, int64_t num_elem) |
| virtual void | get_vector_float64 (char *val, int64_t num_elem) |
| bool | is_source_big_endian () const |
| Is the data source we are reading from a big-endian machine? We need this because the value of the CRC32 checksum is dependent on byte order. More... | |
| void | set_twiddle_bytes (bool twiddle) |
Static Public Attributes | |
| static const unsigned int | c_checksum_length = 4 |
Detailed Description
Read data from the stream made by D4StreamMarshaller.
Definition at line 65 of file D4StreamUnMarshaller.h.
Constructor & Destructor Documentation
◆ D4StreamUnMarshaller() [1/2]
| libdap::D4StreamUnMarshaller::D4StreamUnMarshaller | ( | istream & | in, |
| bool | twiddle_bytes | ||
| ) |
Build a DAP4 Stream unMarshaller.
Build a DAP4 Stream UnMarshaller initialed to read from am istream object. Figure out if the words read for values need to be 'twiddled' based on the byte-order of the stream an this host (see set_twiddle_bytes()).
- Parameters
-
in Read from this input stream is_stream_bigendian The byte order of the data in the stream
Definition at line 59 of file D4StreamUnMarshaller.cc.
◆ D4StreamUnMarshaller() [2/2]
| libdap::D4StreamUnMarshaller::D4StreamUnMarshaller | ( | istream & | in | ) |
When using this constructor, set_twiddle_bytes() should be called before data are processed.
- Parameters
-
in
Definition at line 80 of file D4StreamUnMarshaller.cc.
Member Function Documentation
◆ dump()
|
virtual |
dump the contents of this object to the specified ostream
This method is implemented by all derived classes to dump their contents, in other words, any state they might have, private variables, etc...
- Parameters
-
strm C++ i/o stream to dump the object to
Implements libdap::UnMarshaller.
Definition at line 468 of file D4StreamUnMarshaller.cc.
◆ get_count()
| int64_t libdap::D4StreamUnMarshaller::get_count | ( | ) |
Read a count value from the stream. This is used with D4Sequence which needs to use various other 'get' methods to read its fields. Methods like get_opaque_dap4() handle reading their count values themselves.
- Parameters
-
count The number of elements to follow.
Definition at line 264 of file D4StreamUnMarshaller.cc.
◆ get_opaque_dap4()
|
virtual |
Get opaque data when the size of the data to be read is not known in advance.
- Parameters
-
val Value-result parameter for the data; caller must delete. len value-result parameter for the length of the data
Definition at line 279 of file D4StreamUnMarshaller.cc.
◆ is_source_big_endian()
|
inline |
Is the data source we are reading from a big-endian machine? We need this because the value of the CRC32 checksum is dependent on byte order.
- Note
- This is somewhat tortured logic, but if this host is big-endian and twiddle_bytes is not true, then the remote host must be big-endian. Similarly, if this host is not big-endian and twiddle_bytes is true, then the remote host must be big-endian
Definition at line 104 of file D4StreamUnMarshaller.h.
The documentation for this class was generated from the following files:
