lint_zero.c File Reference

Purpose

The zero linter ensures that the given data has a zero value.

Functional Description

gs1_lint_zero()

GS1_SYNTAX_DICTIONARY_API gs1_lint_err_t gs1_lint_zero	(	const char *const	data,
		size_t *const	err_pos,
		size_t *const	err_len
	)

Used to validate that an AI component has a zero value.

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_NOT_ZERO if the data does not contain a zero value.

{
 
        const char *p;
 
        assert(data);
 
        if (GS1_LINTER_UNLIKELY(*data == '\0'))
                GS1_LINTER_RETURN_ERROR(
                        GS1_LINTER_NOT_ZERO,
                        0,
                        0
                );
 
        /*
         * Data must not contain a non-zero character
         *
         */
        for (p = data; *p; p++) {
                if (GS1_LINTER_UNLIKELY(*p != '0')) {
                        while (*p) p++;
                        GS1_LINTER_RETURN_ERROR(
                                GS1_LINTER_NOT_ZERO,
                                0,
                                (size_t)(p - data)
                        );
                }
        }
 
        GS1_LINTER_RETURN_OK;
 
}