bcnp_codegen Namespace Reference

Functions
int	compute_crc32 (bytes data)
str	canonical_json (dict schema)
int	compute_schema_hash (dict schema)
int	compute_message_size (dict msg)
None	generate_cpp_header (dict schema, Path output_dir)
None	generate_python_bindings (dict schema, Path output_dir)
	main ()

Variables
dict	TYPE_INFO

Detailed Description

BCNP Schema Compiler

Compiles BCNP message schema (JSON) to C++ header and Python bindings.
Generates serialization/deserialization code and computes schema hash (CRC32).

Usage:
    python bcnp_codegen.py schema/messages.json --cpp src/bcnp/generated/
    python bcnp_codegen.py schema/messages.json --python examples/

Function Documentation

canonical_json()

str bcnp_codegen.canonical_json

(

dict

schema

)

Produce a canonical JSON string for schema hashing.
Only includes structurally significant fields (id, name, type, scale).

Definition at line 44 of file bcnp_codegen.py.

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compute_crc32()

int bcnp_codegen.compute_crc32

(

bytes

data

)

IEEE CRC32 matching BCNP's existing implementation.

Definition at line 31 of file bcnp_codegen.py.

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compute_message_size()

int bcnp_codegen.compute_message_size

(

dict

msg

)

Compute wire size of a message in bytes.

Definition at line 77 of file bcnp_codegen.py.

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compute_schema_hash()

int bcnp_codegen.compute_schema_hash

(

dict

schema

)

Compute CRC32 of canonical JSON schema.

Definition at line 71 of file bcnp_codegen.py.

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generate_cpp_header()

None bcnp_codegen.generate_cpp_header	(	dict	schema,
		Path	output_dir )

Generate C++ header with message types and serialization.

The file is written to output_dir/bcnp/message_types.h so that
users can add output_dir to their include path and use:
    #include <bcnp/message_types.h>

Definition at line 85 of file bcnp_codegen.py.

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generate_python_bindings()

None bcnp_codegen.generate_python_bindings	(	dict	schema,
		Path	output_dir )

Generate Python module with message classes and serialization.

Definition at line 395 of file bcnp_codegen.py.

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main()

bcnp_codegen.main

(

)

Definition at line 556 of file bcnp_codegen.py.

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Variable Documentation

TYPE_INFO

dict bcnp_codegen.TYPE_INFO

Initial value:

=  {
    "int8":    (1, "int8_t",   True,  "b"),
    "uint8":   (1, "uint8_t",  False, "B"),
    "int16":   (2, "int16_t",  True,  "h"),
    "uint16":  (2, "uint16_t", False, "H"),
    "int32":   (4, "int32_t",  True,  "i"),
    "uint32":  (4, "uint32_t", False, "I"),
    "float32": (4, "float",    True,  "f"),  # Encoded as int32 with scale
}

Definition at line 20 of file bcnp_codegen.py.