sanei.h File Reference

Convenience macros and function declarations for backends. More...

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Public macros and functions
#define	__sane_unused__
	Return number of elements of an array.
#define	NELEMS(a)
	Return number of elements of an array.
#define	STRINGIFY1(x)
	Return number of elements of an array.
#define	STRINGIFY(x)
	Turn parameter into string.
#define	PASTE1(x, y)
	Return number of elements of an array.
#define	PASTE(x, y)
	Concatenate parameters.
SANE_Status	sanei_check_value (const SANE_Option_Descriptor *opt, void *value)
	Check the constraints of a SANE option. More...
SANE_Status	sanei_constrain_value (const SANE_Option_Descriptor *opt, void *value, SANE_Word *info)
	Check the constraints of a SANE option and adjust its value if necessary. More...

Detailed Description

Convenience macros and function declarations for backends.

See also

sanei_backend.h sanei_thread.h

Function Documentation

sanei_check_value()

SANE_Status sanei_check_value	(	const SANE_Option_Descriptor *	opt,
		void *	value
	)

Check the constraints of a SANE option.

Parameters

opt	option to check
value	value of the option

Returns

• SANE_STATUS_GOOD - on success
• SANE_STATUS_INVAL - if the value doesn't fit inside the constraint or any other error occurred

See also

sanei_constrain_value()

sanei_constrain_value()

SANE_Status sanei_constrain_value	(	const SANE_Option_Descriptor *	opt,
		void *	value,
		SANE_Word *	info
	)

Check the constraints of a SANE option and adjust its value if necessary.

Depending on the type of the option and constraint, value is modified to fit inside constraint.

Parameters

opt	option to check
value	value of the option
info	info is set to SANE_INFO_INEXACT if value was changed

Returns

• SANE_STATUS_GOOD - on success
• SANE_STATUS_INVAL - if the function wasn't able to fit value into the constraint or any other error occurred

See also

sanei_check_value()