arch_pkg_text/

value.rs

//! Value types returned by the various queries on the different structured text formats.

use core::{
    iter::{DoubleEndedIterator, FusedIterator},
    num::ParseIntError,
    str::Split,
};
use derive_more::{AsRef, Deref, Display};
use parse_hex::ParseHex;

macro_rules! impl_str {
    ($container:ident) => {
        impl<'a> $container<'a> {
            /// Create the wrapper.
            pub fn new(text: &'a str) -> Self {
                $container(text)
            }

            /// Get an immutable reference to the raw string underneath.
            pub fn as_str(&self) -> &'a str {
                &self.0.as_ref()
            }
        }
    };
}

macro_rules! impl_hex {
    ($container:ident, $size:literal) => {
        impl<'a> $container<'a> {
            /// Convert the hex string into an array of 8-bit unsigned integers.
            pub fn u8_array(self) -> Option<[u8; $size]> {
                let (invalid, array) = ParseHex::parse_hex(self.0);
                invalid.is_empty().then_some(array)
            }
        }

        impl<'a> ParseArray for $container<'a> {
            type Array = [u8; $size];
            type Error = ();
            fn parse_array(&self) -> Result<Self::Array, Self::Error> {
                self.u8_array().ok_or(())
            }
        }
    };
}

macro_rules! impl_srcinfo_checksum {
    ($container:ident, $size:literal) => {
        impl<'a> $container<'a> {
            /// Convert the hex string into an array of 8-bit unsigned integers.
            pub fn u8_array(self) -> Option<SkipOrArray<$size>> {
                if self.as_str() == "SKIP" {
                    return Some(SkipOrArray::Skip);
                }
                let (invalid, array) = ParseHex::parse_hex(self.0);
                invalid.is_empty().then_some(SkipOrArray::Array(array))
            }
        }

        impl<'a> ParseArray for $container<'a> {
            type Array = SkipOrArray<$size>;
            type Error = ();
            fn parse_array(&self) -> Result<Self::Array, Self::Error> {
                self.u8_array().ok_or(())
            }
        }
    };
}

macro_rules! impl_num {
    ($container:ident, $num:ty) => {
        impl_str!($container);
        impl<'a> $container<'a> {
            /// Extract numeric value.
            pub fn parse(&self) -> Result<$num, ParseIntError> {
                self.as_str().parse()
            }
        }
    };
}

macro_rules! def_str_wrappers {
    ($(
        $(#[$attrs:meta])*
        $name:ident;
    )*) => {$(
        $(#[$attrs])*
        #[derive(Debug, Display, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, AsRef, Deref)]
        pub struct $name<'a>(pub &'a str);
        impl_str!($name);
    )*};
}

macro_rules! def_hex_wrappers {
    ($(
        $(#[$attrs:meta])*
        $name:ident {
            size = $size:literal;
        }
    )*) => {$(
        $(#[$attrs])*
        #[derive(Debug, Display, Clone, Copy, AsRef, Deref)]
        pub struct $name<'a>(pub &'a str);
        impl_str!($name);
        impl_hex!($name, $size);
    )*};
}

macro_rules! def_srcinfo_checksum_wrappers {
    ($(
        $(#[$attrs:meta])*
        $name:ident {
            size = $size:literal;
        }
    )*) => {$(
        $(#[$attrs])*
        #[derive(Debug, Display, Clone, Copy, AsRef, Deref)]
        pub struct $name<'a>(pub &'a str);
        impl_str!($name);
        impl_srcinfo_checksum!($name, $size);
    )*};
}

macro_rules! def_b64_wrappers {
    ($(
        $(#[$attrs:meta])*
        $name:ident;
    )*) => {$(
        $(#[$attrs])*
        #[derive(Debug, Display, Clone, Copy, AsRef, Deref)]
        pub struct $name<'a>(pub &'a str);
        impl_str!($name);
    )*};
}

macro_rules! def_num_wrappers {
    ($(
        $(#[$attrs:meta])*
        $name:ident = $num:ty;
    )*) => {$(
        $(#[$attrs])*
        #[derive(Debug, Display, Clone, Copy, AsRef, Deref)]
        pub struct $name<'a>(&'a str);
        impl_num!($name, $num);
    )*};
}

macro_rules! def_list_wrappers {
    ($(
        $(#[$container_attrs:meta])*
        $container_name:ident {
            $(#[$iter_attrs:meta])*
            Iter = $iter_name:ident;
            $(#[$item_attrs:meta])*
            Item = $item_name:ident;
        }
    )*) => {$(
        $(#[$container_attrs])*
        #[derive(Debug, Clone, Copy)]
        pub struct $container_name<'a>(&'a str);

        impl<'a> $container_name<'a> {
            /// Create the wrapper.
            pub fn new(text: &'a str) -> Self {
                $container_name(text)
            }

            /// List the items.
            pub fn iter(&self) -> $iter_name<'_> {
                self.into_iter()
            }
        }

        impl<'a> IntoIterator for $container_name<'a> {
            type IntoIter = $iter_name<'a>;
            type Item = $item_name<'a>;
            fn into_iter(self) -> Self::IntoIter {
                $iter_name(self.0.split('\n'))
            }
        }

        $(#[$iter_attrs])*
        #[derive(Debug, Clone)]
        pub struct $iter_name<'a>(Split<'a, char>);

        impl<'a> Iterator for $iter_name<'a> {
            type Item = $item_name<'a>;
            fn next(&mut self) -> Option<Self::Item> {
                self.0.next().map($item_name)
            }
            fn size_hint(&self) -> (usize, Option<usize>) {
                self.0.size_hint()
            }
        }

        impl<'a> DoubleEndedIterator for $iter_name<'a> {
            fn next_back(&mut self) -> Option<Self::Item> {
                self.0.next_back().map($item_name)
            }
        }

        impl<'a> FusedIterator for $iter_name<'a> {}

        $(#[$item_attrs])*
        #[derive(Debug, Display, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, AsRef, Deref)]
        pub struct $item_name<'a>(pub &'a str);
        impl_str!($item_name);
    )*};
}

def_str_wrappers! {
    /// Type of value of `FILENAME`, `noextract`, and `install`.
    FileName;
    /// Type of value of `NAME` and `pkgname`.
    Name;
    /// Type of value of `BASE` and `pkgbase`.
    Base;
    /// Type of value of `VERSION`.
    Version;
    /// Type of value of `pkgver`.
    UpstreamVersion;
    /// Type of value of `DESC` and `pkgdesc`.
    Description;
    /// Type of value of `URL`.
    Url;
    /// Type of value of `PACKAGER`.
    Packager;
    /// Type of value of `changelog`.
    ChangeLog;
    /// Type of value of `options`.
    BuildOption;
    /// Type of value of `backup`.
    FilePath;
    /// Type of value of `source`.
    Source;
    /// Type of value of `validpgpkeys`.
    PgpKey;
}

def_hex_wrappers! {
    /// Type of value of `MD5SUM`.
    Hex128 {
        size = 16;
    }
    /// Type of value of `SHA256SUM`.
    Hex256 {
        size = 32;
    }
}

def_srcinfo_checksum_wrappers! {
    /// Type of value of `md5sums`.
    SkipOrHex128 {
        size = 16;
    }
    /// Type of value of `sha1sums`.
    SkipOrHex160 {
        size = 20;
    }
    /// Type of value of `sha224sums`.
    SkipOrHex224 {
        size = 28;
    }
    /// Type of value of `sha256sums`.
    SkipOrHex256 {
        size = 32;
    }
    /// Type of value of `sha384sums`.
    SkipOrHex384 {
        size = 48;
    }
    /// Type of value of `sha512sums` and `b2sums`.
    SkipOrHex512 {
        size = 64;
    }
}

def_b64_wrappers! {
    /// Type of value of `PGPSIG`.
    PgpSignature;
}

def_num_wrappers! {
    /// Type of value of `CSIZE` and `ISIZE`.
    Size = u64;
    /// Type of value of `BUILDDATE`.
    Timestamp = u64;
    /// Type of value of `epoch`.
    Epoch = u64;
    /// Type of value of `pkgrel`.
    Release = u64; // TODO: change this to allow `a.b` syntax
}

def_list_wrappers! {
    /// Type of value of `GROUPS`.
    GroupList {
        /// [Iterator] type of [`GroupList`].
        Iter = GroupIterator;
        /// Type of [iterator item](Iterator::Item) of [`GroupList`] and value of `groups`.
        Item = Group;
    }

    /// Type of value of `LICENSE`.
    LicenseList {
        /// [Iterator] type of [`LicenseList`].
        Iter = LicenseIterator;
        /// Type of [iterator item](Iterator::Item) of [`LicenseList`] and value of `license`.
        Item = License;
    }

    /// Type of value of `ARCH`.
    ArchitectureList {
        /// [Iterator] type of [`ArchitectureList`].
        Iter = ArchitectureIterator;
        /// Type of [iterator item](Iterator::Item) of [`ArchitectureList`] and value of `arch`.
        Item = Architecture;
    }

    /// Type of value of `DEPENDS`, `MAKEDEPENDS`, `CHECKDEPENDS`, `PROVIDES`, `CONFLICTS`, and `REPLACES`.
    DependencyList {
        /// [Iterator] type of [`DependencyList`].
        Iter = DependencyIterator;
        /// Type of [iterator item](Iterator::Item) of [`DependencyList`].
        Item = Dependency;
    }

    /// Type of value of `OPTDEPENDS`.
    DependencyAndReasonList {
        /// [Iterator] type of [`DependencyAndReasonList`].
        Iter = DependencyAndReasonIterator;
        /// Type of [iterator item](Iterator::Item) of [`DependencyAndReasonList`].
        Item = DependencyAndReason;
    }
}

def_str_wrappers! {
    /// Name of a [dependency](Dependency). It could either be a [package name](Name) or a soname of a library.
    DependencyName;
    /// Reason for installing a [dependency](DependencyAndReason).
    DependencyReason;
    /// Specification of a [dependency](DependencyName).
    DependencySpecification;
}

mod dependency;
mod dependency_and_reason;
mod dependency_name;
mod dependency_specification;
mod dependency_specification_operator;
mod hex128;
mod parse_array;
mod parse_hex;
mod skip_or_array;

pub use dependency_specification_operator::DependencySpecificationOperator;
pub use parse_array::ParseArray;
pub use skip_or_array::SkipOrArray;