lib_tcstring 0.5.0

IAB TCF v2 TCString utilities
Documentation 
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#[doc(hidden)]
#[macro_export]
macro_rules! byte_list_bit_boundary_check {
    ($byte_list: expr, $bit_index: expr) => {{
        let length = $byte_list.len();
        let bit_index: usize = $bit_index;

        if length * 8 < bit_index {
            return Err($crate::decode::error::TcsError::InsufficientLength);
        }
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! range_section_value {
    ($sections: expr, $variant: path) => {{
        let sections = &mut $sections;

        if sections.is_empty() {
            return Err($crate::decode::error::TcsError::InvalidSectionDefinition);
        }

        if let RangeSection {
            last_bit: _,
            value: $variant(section),
        } = sections.remove(0)
        {
            section
        } else {
            return Err($crate::decode::error::TcsError::InvalidSectionDefinition);
        }
    }};
}

#[doc(hidden)]
#[macro_export]
macro_rules! parse_bitfield_from_bytes {
    ($name: ident, $type: tt) => {
        pub(crate) fn $name(
            val: &[u8],
            bit_start: usize,
            bit_length: usize,
        ) -> Result<Vec<$type>, $crate::decode::error::TcsError> {
            let bit_end = bit_start + bit_length;

            byte_list_bit_boundary_check!(val, bit_end);

            let mut result: Vec<$type> = Vec::with_capacity(bit_length);

            for bit_index in bit_start..bit_end {
                if parse_from_bytes(val, bit_index, 1) == 1 {
                    result.push(((bit_index - bit_start) + 1) as $type);
                }
            }

            Ok(result)
        }
    };
}