spf 0.9.0

.spf (Simple Pixel Font) file parser
Documentation 
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/*
 * Copyright 2025 SimplePixelFont
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use super::*;

impl TryFrom<CharacterTable> for SPFCharacterTable {
    type Error = ConversionError;

    fn try_from(table: CharacterTable) -> Result<Self, Self::Error> {
        let (pixmap_table_indexes_ptr, pixmap_table_indexes_len) =
            option_vec_to_raw!(table.pixmap_table_indexes);

        let (characters_ptr, characters_len) =
            vec_to_raw_with_conversion!(table.characters, SPFCharacter);

        Ok(SPFCharacterTable {
            modifier_flags: table.modifier_flags.bits(),

            configuration_flags: table.configuration_flags.bits(),
            has_constant_code_point_count: table.constant_code_point_count.is_some() as c_uchar,
            constant_code_point_count: table.constant_code_point_count.unwrap_or(0) as c_uchar,

            link_flags: table.link_flags.bits(),
            has_pixmap_table_indexes: table.pixmap_table_indexes.is_some() as c_uchar,
            pixmap_table_indexes: pixmap_table_indexes_ptr,
            pixmap_table_indexes_length: pixmap_table_indexes_len as c_ulong,
            characters: characters_ptr,
            characters_length: characters_len as c_ulong,
        })
    }
}

impl TryInto<CharacterTable> for &SPFCharacterTable {
    type Error = ConversionError;

    fn try_into(self) -> Result<CharacterTable, Self::Error> {
        unsafe {
            let pixmap_table_indexes = if self.pixmap_table_indexes.is_null() {
                Vec::new()
            } else {
                slice::from_raw_parts(
                    self.pixmap_table_indexes,
                    self.pixmap_table_indexes_length as usize,
                )
                .to_vec()
            };

            let characters = vec_from_raw_with_conversion!(self.characters, self.characters_length);

            let constant_code_point_count = ffi_to_option!(
                self.has_constant_code_point_count,
                self.constant_code_point_count
            );
            let pixmap_table_indexes =
                ffi_to_option!(self.has_pixmap_table_indexes, pixmap_table_indexes);

            Ok(CharacterTable {
                modifier_flags: CharacterTableModifierFlags::from_bits_retain(self.modifier_flags),
                configuration_flags: CharacterTableConfigurationFlags::from_bits_retain(self.configuration_flags),
                constant_code_point_count,
                link_flags: CharacterTableLinkFlags::from_bits_retain(self.link_flags),
                pixmap_table_indexes,
                characters,
            })
        }
    }
}