codegen.h File Reference

Code synthesizer for bfdmux filters. More...

Macros
#define	MAX_FILTER_CODE_SIZE   256
	Maximum number of bytes for a compiled filter. More...
#define	INITIAL_ALLOC_SIZE   64
#define	INCREMENTAL_ALLOC_SIZE   64

Functions
void	compile_filter (char *expression, uint8_t **filter_code, int32_t *filter_len)
	Compiles a filter expression in Bfdmux Filter Language into Bfdmux Intermediate Code. More...

Detailed Description

Code synthesizer for bfdmux filters.

This file provides the interface for the filter code generator.

Macro Definition Documentation

#define INCREMENTAL_ALLOC_SIZE   64

Size of realloc'ed blocks if filter code doesn't fit

#define INITIAL_ALLOC_SIZE   64

Size of initially allocated filter code block

#define MAX_FILTER_CODE_SIZE   256

Maximum number of bytes for a compiled filter.

This is used to limit bfdmux's workload in some way.

Function Documentation

void compile_filter	(	char *	expression,
		uint8_t **	filter_code,
		int32_t *	filter_len
	)

Compiles a filter expression in Bfdmux Filter Language into Bfdmux Intermediate Code.

Parameters

	expression	the expression to compile
[out]	filter_code	Points to the memory buffer that contains the compiled filter, or NULL, if an error occurred
[out]	filter_len	Indicates the length of the compiled code, or contains the error position in the filter string on failure