Helpers for flex and bison driver frontends

Collaboration diagram for Helpers for flex and bison driver frontends:

Functions
CT_INTEROP_API void	flex_action (INOUT_NOTNULL where_t *where, const char *text)
	tracks the current source position More...
CT_INTEROP_API int	flex_input (INOUT_NOTNULL scan_t *scan, STA_WRITES(size) char *out, int size)
	retrevies more input for flex More...
CT_INTEROP_API void	flex_init (OUT_NOTNULL where_t *where)
	initialize source location tracking More...
CT_INTEROP_API void	flex_update (INOUT_NOTNULL where_t *where, STA_READS(steps) const where_t *offsets, int steps)
	update the source location More...
#define	BISON_ARENA(x)   scan_get_arena(x)
	get the arena of a scanner More...
#define	FLEX_MEMORY(prefix)
	route memory for flex and bison though cthulhu allocators More...

Detailed Description

Macro Definition Documentation

BISON_ARENA

#define BISON_ARENA

(

x

)

scan_get_arena(x)

get the arena of a scanner

FLEX_MEMORY

#define FLEX_MEMORY

(

prefix

)

Value:

    inline void *prefix##alloc(size_t size, yyscan_t scanner)               \
    {                                                                       \
        scan_t *scan = yyget_extra(scanner);                                \
        arena_t *arena = scan_get_arena(scan);                              \
        return ARENA_MALLOC(size, "yyalloc", scan, arena);                  \
    }                                                                       \
    inline void *prefix##realloc(void *ptr, size_t bytes, yyscan_t scanner) \
    {                                                                       \
        arena_t *arena = scan_get_arena(yyget_extra(scanner));              \
        return arena_realloc(ptr, bytes, CT_ALLOC_SIZE_UNKNOWN, arena);        \
    }                                                                       \
    inline void prefix##free(void *ptr, yyscan_t scanner)                   \
    {                                                                       \
        arena_t *arena = scan_get_arena(yyget_extra(scanner));              \
        if (ptr == NULL)                                                    \
        {                                                                   \
            return;                                                         \
        }                                                                   \
        arena_free(ptr, CT_ALLOC_SIZE_UNKNOWN, arena);                         \
    }

route memory for flex and bison though cthulhu allocators

Parameters

prefix

the prefix assigned to flex and bison functions

Function Documentation

flex_action()

CT_INTEROP_API void flex_action	(	INOUT_NOTNULL where_t *	where,
		const char *	text
	)

tracks the current source position

See also

https://ftp.gnu.org/old-gnu/Manuals/flex-2.5.4/html_node/flex_14.html

Parameters

where	a pointer to the current location
text	current source text

flex_init()

CT_INTEROP_API void flex_init

(

OUT_NOTNULL where_t *

where

)

initialize source location tracking

Parameters

where

the source location to initialize

flex_input()

CT_INTEROP_API int flex_input	(	INOUT_NOTNULL scan_t *	scan,
		STA_WRITES(size) char *	out,
		int	size
	)

retrevies more input for flex

Parameters

scan	the source scanner
out	output buffer to write to
size	total number of characters to write

Returns

number of characters written

flex_update()

CT_INTEROP_API void flex_update	(	INOUT_NOTNULL where_t *	where,
		STA_READS(steps) const where_t *	offsets,
		int	steps
	)

update the source location

Parameters

where	the source location to update
offsets	the source location offsets
steps	the number of steps to update by