lint_cset82.c File Reference

Purpose

The cset82 linter ensures that the given data contains only characters within the GS1 AI encodable character set 82 ("CSET 82").

Remarks

CSET 82 is defined in the GS1 General Specifications table "GS1 AI encodable character set 82".

Functional Description

gs1_lint_cset82()

GS1_SYNTAX_DICTIONARY_API gs1_lint_err_t gs1_lint_cset82	(	const char *const	data,
		size_t *const	err_pos,
		size_t *const	err_len
	)

Used to validate that an AI component conforms to X..99 syntax.

Note: The length of the component is validated by the framework that calls this function.

Parameters

[in]	data	Pointer to the null-terminated data to be linted. Must not be NULL.
[out]	err_pos	To facilitate error highlighting, the start position of the bad data is written to this pointer, if not NULL.
[out]	err_len	The length of the bad data is written to this pointer, if not NULL.

Returns

GS1_LINTER_OK if okay.

GS1_LINTER_INVALID_CSET82_CHARACTER if the data contains a non-CSET 82 character.

{
 
        /*
         * CSET 82 characters: !"%&'()*+,-./0123456789:;<=>?ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz
         *
         */
        static const uint64_t cset82_bitfield[] = {
                0x0000000067ffffff,             // "!", '"', "%", "&", "'", "(", ")", "*", "+", ",", "-", ".", "/", 0-9
                0x7fffffe17fffffe0,             // ":", ";", "<", "=", ">", "?", A-Z, "_", a-z
                0x0000000000000000,
                0x0000000000000000
        };
 
        size_t pos;
 
        assert(data);
 
        /*
         * Validate character set using bitfield lookup
         *
         */
        for (pos = 0; data[pos] != '\0'; pos++) {
                int valid = 0;
                GS1_LINTER_BITFIELD_LOOKUP((unsigned char)data[pos], cset82_bitfield);
                if (GS1_LINTER_UNLIKELY(!valid))
                        GS1_LINTER_RETURN_ERROR(
                                GS1_LINTER_INVALID_CSET82_CHARACTER,
                                pos,
                                1
                        );
        }
 
        GS1_LINTER_RETURN_OK;
 
}