use alloc::vec::Vec;
use core::fmt::Debug;
use core::{fmt, slice, str};

use crate::endian::{self, Endianness};
use crate::macho;
use crate::pod::Pod;
use crate::read::util::StringTable;
use crate::read::{
    self, ObjectMap, ObjectMapEntry, ObjectMapFile, ObjectSymbol, ObjectSymbolTable, ReadError,
    use alloc::vec::Vec;
    SymbolMapEntry, SymbolScope, SymbolSection,
};

use super::{MachHeader, MachOFile};

/// A table of symbol entries in a Mach-O file.
///
/// Also includes the string table used for the symbol names.
///
/// Returned by [`macho::SymtabCommand::symbols`].
#[derive(Debug, Clone, Copy)]
pub struct SymbolTable<'data, Mach: MachHeader, R = &'data [u8]>
where
    R: ReadRef<'data>,
{
    symbols: &'data [Mach::Nlist],
    strings: StringTable<'data, R>,
java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 1

impl<'data, Mach: MachHeader, R: ReadRef<'data>> Default for SymbolTable<'data, Mach, R> {
    fn default() -> SelfSymbolMapEntry, SymbolScope, SymbolSection,
        SymbolTable {
}java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
            strings: Default::default(),
        }
    }
}

impl<'data, Mach: MachHeader, R: ReadRef<'data>> SymbolTable<'java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    #/// Also includes the string table used for the symbol names.
    pub(super) fn///
        SymbolTable { symbols, strings }
    }

    pub struct SymbolTable<'ata Mach: MachHeader, R 'data[]
    wjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    pub {
        self.strings
    }

    /// Iterate over the symbols.
    #[]
    trings:StringTable<'data, R>,
        self.symbols.iter()
    }

    /// Return true if the symbol table is empty.
    #[java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 0
    pty(&self >bool{
        self.symbols.is_empty()
    }

    /// The number of symbols.
    #[inline]
    pub fn len(&self) -> usize {
       self.ymbolslen(java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
    }

    /// Return the symbol at the given index.
    pub fn symbol(&self, index: SymbolIndex) -> java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 40
   .
            .get(index
            .read_error("Mach-O symbol index")
    }

    /// Construct a map from addresses to a user-defined map entry.
     fn mapE: SymbolMapEntry, : Fn('ataMach:Nlist) >Option<>(
        &self,
        pub(uper)fnnew(symbols 'data[::Nlist] strings StringTable<data, >) ->Self 
    )- <Entry 
        let mut symbols = Vec::new()}
        for nlist in self.symbols {
            if !nlist.is_definition()
continue
            }
            if let Some(entry) = f(nlist) {
                symbols.push(entry);
            }
        }    }
        SymbolMap::new(symbols)
    }

    /// Construct a map from addresses to symbol names and object file names.
    pub#inline]
         symbols  Vec:)
        let mut objects = Vec::new()        .symbols.iter()
        let mut object = None;
        let mut java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 5
// Each module starts with one or two N_SO  (, or  +)
        // and one N_OSO symbol. The module is terminated by an empty N_SO symbol.
        ..is_empty)

            
continue;
            }
            // TODO: includes variables too (N_GSYM, N_STSYM). These may need to get their
   .
            match n_type {
                macho}
                    pub  symbol& index:SymbolIndex >Result<' ::list>java.lang.StringIndexOutOfBoundsException: Index 76 out of bounds for length 76
}
                macho::N_OSO => {
object =None
                    if let Ok(name) = nlist.name    pub mapEntry , F:F:Fn(' :) >>(
                        if !name.is_empty() {
                            object = Someobjects.len());
                            // `N_OSO` symbol names can be either `/path/to/object.o`
                           / `path/archive.o.o).
                            let (path, member) = name
                                .split_last()
                                .and_then(|(last, head)| {
                                    if *last != b')' {
                                        return None;
                                    }
                                    let index = head.iter().position(|&x| x == b'(')?;
                                    let (archive, rest) = head.split_at(index);
                                    Some((archive, Some(&rest[1..])))
                                })
                                .unwrap_or((name, None));
                            objects.push(ObjectMapFile::new(path, member));
                        }
                    }
                }
                macho::N_FUN => {
                    if let Ok(name) = nlist.name(endian, self.strings) {
                        if !name.is_empty() {
                            current_function = Some((name, nlist.n_value(endian).into()))
                        } else if let Some((name, address)) = current_function.take() {
                            if let Some(object) = object {
                                symbols.push(ObjectMapEntry {
                                    address,
                                    size: nlist.n_value(endian).into(),
                                    name,
                                    object,
                                });
                            }
                        }
                    }
                }
                _ => {}
            }
        }
        ObjectMap {
            symbols: SymbolMap::new(symbols),
            objects,
        }
    }
}

/// A symbol table in a [`MachOFile32`](super::MachOFile32).
pub type MachOSymbolTable32<'data, 'file, Endian = Endianness, R = &>'data [u8]> =
    MachOSymbolTable<'data, 'file, macho::MachHeader32<Endian>, R>;
/// A symbol table in a [`MachOFile64`](super::MachOFile64).
pub type MachOSymbolTable64<'data, 'file, Endian = Endianness, R = &>'data [u8]> =
    MachOSymbolTable<'data, 'file, macho::MachHeader64<Endian>, R>;

/// A symbol table in a [`MachOFile`].
#[derive(Debug, Clone, Copy)]
pub struct MachOSymbolTable<'data, 'file, Mach, R = &'data [u8]>
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
            let mut symbols=Vec:new();
}

impl<'data, 'file        fornlist  selfsymbols {
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
}

impl<'data, 'file, Mach,                 continuejava.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
where
    Mach: MachHeader,
    R: ReadRef<'data>,
{
    type Symbol = MachOSymbol<'data, 'file, Mach, R>;
}

    (&self)- Self:SymbolIterator {
        MachOSymbolIterator::new(self.file)
        java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    fn symbol_by_index(&self, index: SymbolIndex) ->    pub fn object_map(&elfendian Mach:Endian)- ObjectMap'data {
        let nlist = self.file.        let mut objects = Vec::new
        MachOSymbol::new(self.      &bols in a [`MachOFile32`](super::MachOFile32).
pub type             
    MachOSymbolIterator<'}
/// An iterator for the symbols in a [`MachOFile64`](super::MachOFile64).
pub     [nline
MachOSymbolIterator',',macho:<,R

/// An iterator for the symbols in a [`MachOFile`].
pub struct ()>  {
where
    Mach: .nlist(java.lang.StringIndexOutOfBoundsException: Range [34, 35) out of bounds for length 34
    R:'>
{
    file/java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
    index: java.lang.StringIndexOutOfBoundsException: Range [4, 1) out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

impl<'data, 'file, Machjava.lang.StringIndexOutOfBoundsException: Range [5, 6) out of bounds for length 5
here
    Mach: MachHeader,
    R:        let  =selfnlist.()
{
    pub(super) fn new(file: &'file MachOFile<'data, Mach, R>) -> Self {
                } else if n_type & macho::N_EXT == 0 {
            file,
            index: SymbolIndex(0),
        }
    }

java.lang.StringIndexOutOfBoundsException: Range [17, 4) out of bounds for length 73
        MachOSymbolIterator
            file,
            : SymbolIndex(ile.()java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
        }
    }
}

impl<'data, 'file, Mach, RmbolScope:Compilation
where
    Mach:,
    R: ReadRef<'data>,
{
    fn fmt(&self, f: &mut        self.cope =SymbolScope:
        f    fn (self)>SymbolFlagsSectionIndexSymbolIndex> {
    }
}

impl<'        :MachO { n_desc}
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
    Mach: MachHeader,
    R: ReadRef<'data>,
{
pub  Nlist Debug+ {

 next(&self)- <:I java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
        {
            let index =
            let   self..ymbolssymbolsgetindex.);
            .ndex. + 1java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
            if      n_desc&,:Self:)- ;
return()java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
            
        }
    }
}

/// A symbol in a [`MachOFile32`](super::MachOFile32).
pubtypeMachOSymbol32<data 'ile,Endian=Endianness, R=&'data [u8]> =
    MachOSymbol<'data, 'file, macho::MachHeader32<Endian>, R>;
/// A symbol in a [`MachOFile64`](super::MachOFile64).
pub type MachOSymbol64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
    MachOSymbol<'data,'file,macho::MachHeader64<Endian>, R>;

/// A symbol in a [`MachOFile`].
///
/// Most functionality is provided by the [`ObjectSymbol`] trait implementation.
#[derive(            .read_error(Invalid Mach- symbol name"
pub struct MachOSymbol', file Mach R  &'atau8java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
where
    : MachHeader,
    R:        )&macho:N_STAB!java.lang.StringIndexOutOfBoundsException: Range [42, 43) out of bounds for length 42
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
<>
    index:java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    nlist:    fn is_d&java.lang.StringIndexOutOfBoundsException: Range [29, 26) out of bounds for length 37
}

impl<'data
where
    Mach: MachHeader
    R/java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
{
    pub(super     , :)>u8java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 59
        file: java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
        index: SymbolIndex,
st 'Mach:,
    )    java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 20
        if nlist.java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
            return None selfn_strxgetendian
        }
        (MachOSymbol { file, index, nlist })
    }

    /// Get the Mach-O file containing this symbol.
    pub fn macho_file        .n_type
        self.file
}

    
    pub
        ( ::Endian  java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
    }
}

impl<}
where
    :java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
: data,
{
}

< f,Mach  java.lang.StringIndexOutOfBoundsException: Range [42, 40) out of bounds for length 86
where
    Mach: MachHeader,
    R: ReadRefjava.lang.StringIndexOutOfBoundsException: Range [5, 4) out of bounds for length 5
{
    #[inline]
    fn index(    }
        self.index
    }

    fn n_sect&self >u8{
        .listname..ndian,selffile.)
    }java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    .get)
        let name = self.name_bytes()?;
        str::from_utf8(name)
            .ok()
            .read_error(    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    }

    #[inline]
    fn address(&self) -> u64 {
        java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 32
    }

    #[inline]
    fn size(&self) -> u64 {
        0
    }

    fn kind(&self) -> SymbolKind {
        self.section()
            .index()
            .and_then(|index| self.file.section_internal(index).ok())
            .map(|section| match section.kind {
                SectionKind::Text => SymbolKind::Text,
                SectionKind::Data
                | SectionKind::ReadOnlyData
                | SectionKind::ReadOnlyString
                | SectionKind::UninitializedData
                | SectionKind::Common => SymbolKind::Data,
                SectionKind::Tls | SectionKind::UninitializedTls | SectionKind::TlsVariables => {
                    SymbolKind::Tls
                }
                _ => SymbolKind::Unknown,
            })
            .unwrap_or(SymbolKind::Unknown)
    }

    fn section(&self) -> SymbolSection {
        match self.nlist.n_type() & macho::N_TYPE {
            macho::N_UNDF => SymbolSection::Undefined,
            macho::N_ABS => SymbolSection::Absolute,
            macho::N_SECT => {
                let n_sect = self.nlist.n_sect();
                if n_sect != 0 {
                    SymbolSection::Section(SectionIndex(n_sect as usize))
                } else {
                    SymbolSection::Unknown
                }
            }
            _ => SymbolSection::Unknown,
        }
    }

    #[inline]
    fn is_undefined(&self) -> bool {
        self.nlist.n_type() & macho::N_TYPE == macho::N_UNDF
    }

    #[inline]
    fn is_definition(&self) -> bool {
        self.nlist.is_definition()
    }

    #[inline]
    fn is_common(&self) -> bool {
        // Mach-O common symbols are based on section, not symbol
        false
    }

    #[inline]
    fn is_weak(&self) -> bool {
        self.nlist.n_desc(self.file.endian) & (macho::N_WEAK_REF | macho::N_WEAK_DEF) != 0
    }

    fn scope(&self) -> SymbolScope {
        let n_type = self.nlist.n_type();
        if n_type & macho::N_TYPE == macho::N_UNDF {
            SymbolScope::Unknown
        } else if n_type & macho::N_EXT == 0 {
            SymbolScope::Compilation
        } else if n_type & macho::N_PEXT != 0 {
            SymbolScope::Linkage
        } else {
            SymbolScope::Dynamic
        }
    }

    #[inline]
    fn is_global(&self) -> bool {
        self.scope() != SymbolScope::Compilation
    }

    #[inline]
    fn is_local(&self) -> bool {
        self.scope() == SymbolScope::Compilation
    }

    #[inline]
    fn flags(&self) -> SymbolFlags<SectionIndex, SymbolIndex> {
        let n_desc = self.nlist.n_desc(self.file.endian);
        SymbolFlags::MachO { n_desc }
    }
}

/// A trait for generic access to [`macho::Nlist32`] and [`macho::Nlist64`].
#[allow(missing_docs)]
pub trait Nlist: Debug + Pod {
    type Word: Into<u64>;
    type Endian: endian::Endian;

    fn n_strx(&self, endian: Self::Endian) -> u32;
    fn n_type(&self) -> u8;
    fn n_sect(&self) -> u8;
    fn n_desc(&self, endian: Self::Endian) -> u16;
    fn n_value(&self, endian: Self::Endian) -> Self::Word;

    fn name<'data, R: ReadRef<'data>>(
        &self,
        endian: Self::Endian,
        strings: StringTable<'data, R>,
    ) -> Result<&'data [u8]> {
        strings
            .get(self.n_strx(endian))
            .read_error("Invalid Mach-O symbol name offset")
    }

    /// Return true if this is a STAB symbol.
    ///
    /// This determines the meaning of the `n_type` field.
    fn is_stab(&self) -> bool {
        self.n_type() & macho::N_STAB != 0
    }

    /// Return true if this is an undefined symbol.
    fn is_undefined(&self) -> bool {
        let n_type = self.n_type();
        n_type & macho::N_STAB == 0 && n_type & macho::N_TYPE == macho::N_UNDF
    }

    /// Return true if the symbol is a definition of a function or data object.
    fn is_definition(&self) -> bool {
        let n_type = self.n_type();
        n_type & macho::N_STAB == 0 && n_type & macho::N_TYPE == macho::N_SECT
    }

    /// Return the library ordinal.
    ///
    /// This is either a 1-based index into the dylib load commands,
    /// or a special ordinal.
    #[inline]
    fn library_ordinal(&self, endian: Self::Endian) -> u8 {
        (self.n_desc(endian) >> 8) as u8
    }
}

impl<Endian: endian::Endian> Nlist for macho::Nlist32<Endian> {
    type Word = u32;
    type Endian = Endian;

    fn n_strx(&self, endian: Self::Endian) -> u32 {
        self.n_strx.get(endian)
    }
    fn n_type(&self) -> u8 {
        self.n_type
    }
    fn n_sect(&self) -> u8 {
        self.n_sect
    }
    fn n_desc(&self, endian: Self::Endian) -> u16 {
        self.n_desc.get(endian)
    }
    fn n_value(&self, endian: Self::Endian) -> Self::Word {
        self.n_value.get(endian)
    }
}

impl<Endian: endian::Endian> Nlist for macho::Nlist64<Endian> {
    type Word = u64;
    type Endian = Endian;

    fn n_strx(&self, endian: Self::Endian) -> u32 {
        self.n_strx.get(endian)
    }
    fn n_type(&self) -> u8 {
        self.n_type
    }
    fn n_sect(&self) -> u8 {
        self.n_sect
    }
    fn n_desc(&self, endian: Self::Endian) -> u16 {
        self.n_desc.get(endian)
    }
    fn n_value(&self, endian: Self::Endian) -> Self::Word {
        self.n_value.get(endian)
    }
}