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    // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
    // file at the top-level directory of this distribution and at
    // http://rust-lang.org/COPYRIGHT.
    //
    // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
    // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
    // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
    // option. This file may not be copied, modified, or distributed
    // except according to those terms.

    //! Crate docs

    #![allow(bad_style, overflowing_literals, improper_ctypes)]
    #![crate_type = "rlib"]
    #![crate_name = "libc"]
    #![cfg_attr(dox, feature(no_core, lang_items))]
    #![cfg_attr(dox, no_core)]
    #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
           html_favicon_url = "https://doc.rust-lang.org/favicon.ico")]

    #![cfg_attr(all(target_os = "linux", target_arch = "x86_64"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-linux-gnu"
    ))]
    #![cfg_attr(all(target_os = "linux", target_arch = "x86"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/i686-unknown-linux-gnu"
    ))]
    #![cfg_attr(all(target_os = "linux", target_arch = "arm"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/arm-unknown-linux-gnueabihf"
    ))]
    #![cfg_attr(all(target_os = "linux", target_arch = "mips"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/mips-unknown-linux-gnu"
    ))]
    #![cfg_attr(all(target_os = "linux", target_arch = "aarch64"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/aarch64-unknown-linux-gnu"
    ))]
    #![cfg_attr(all(target_os = "linux", target_env = "musl"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-linux-musl"
    ))]
    #![cfg_attr(all(target_os = "macos", target_arch = "x86_64"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-apple-darwin"
    ))]
    #![cfg_attr(all(target_os = "macos", target_arch = "x86"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/i686-apple-darwin"
    ))]
    #![cfg_attr(all(windows, target_arch = "x86_64", target_env = "gnu"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-pc-windows-gnu"
    ))]
    #![cfg_attr(all(windows, target_arch = "x86", target_env = "gnu"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/i686-pc-windows-gnu"
    ))]
    #![cfg_attr(all(windows, target_arch = "x86_64", target_env = "msvc"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-pc-windows-msvc"
    ))]
    #![cfg_attr(all(windows, target_arch = "x86", target_env = "msvc"), doc(
        html_root_url = "https://doc.rust-lang.org/libc/i686-pc-windows-msvc"
    ))]
    #![cfg_attr(target_os = "android", doc(
        html_root_url = "https://doc.rust-lang.org/libc/arm-linux-androideabi"
    ))]
    #![cfg_attr(target_os = "freebsd", doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-freebsd"
    ))]
    #![cfg_attr(target_os = "openbsd", doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-openbsd"
    ))]
    #![cfg_attr(target_os = "bitrig", doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-bitrig"
    ))]
    #![cfg_attr(target_os = "netbsd", doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-netbsd"
    ))]
    #![cfg_attr(target_os = "dragonfly", doc(
        html_root_url = "https://doc.rust-lang.org/libc/x86_64-unknown-dragonfly"
    ))]

    // Attributes needed when building as part of the standard library
    #![cfg_attr(stdbuild, feature(no_std, core, core_slice_ext, staged_api, custom_attribute, cfg_target_vendor))]
    #![cfg_attr(stdbuild, no_std)]
    #![cfg_attr(stdbuild, staged_api)]
    #![cfg_attr(stdbuild, allow(warnings))]
    #![cfg_attr(stdbuild, unstable(feature = "libc",
                                   reason = "use `libc` from crates.io",
                                   issue = "27783"))]

    #![cfg_attr(not(feature = "use_std"), no_std)]

    #[cfg(all(not(stdbuild), not(dox), feature = "use_std"))]
    extern crate std as core;

    #[macro_use] mod macros;
    mod dox;

    // Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help enable
    // more optimization opportunities around it recognizing things like
    // malloc/free.
    #[repr(u8)]
    pub enum c_void {
        // Two dummy variants so the #[repr] attribute can be used.
        #[doc(hidden)]
        __variant1,
        #[doc(hidden)]
        __variant2,
    }

    pub type int8_t = i8;
    pub type int16_t = i16;
    pub type int32_t = i32;
    pub type int64_t = i64;
    pub type uint8_t = u8;
    pub type uint16_t = u16;
    pub type uint32_t = u32;
    pub type uint64_t = u64;

    pub type c_schar = i8;
    pub type c_uchar = u8;
    pub type c_short = i16;
    pub type c_ushort = u16;
    pub type c_int = i32;
    pub type c_uint = u32;
    pub type c_float = f32;
    pub type c_double = f64;
    pub type c_longlong = i64;
    pub type c_ulonglong = u64;
    pub type intmax_t = i64;
    pub type uintmax_t = u64;

    pub type size_t = usize;
    pub type ptrdiff_t = isize;
    pub type intptr_t = isize;
    pub type uintptr_t = usize;
    pub type ssize_t = isize;

    pub enum FILE {}
    pub enum fpos_t {} // TODO: fill this out with a struct

    extern {
        pub fn isalnum(c: c_int) -> c_int;
        pub fn isalpha(c: c_int) -> c_int;
        pub fn iscntrl(c: c_int) -> c_int;
        pub fn isdigit(c: c_int) -> c_int;
        pub fn isgraph(c: c_int) -> c_int;
        pub fn islower(c: c_int) -> c_int;
        pub fn isprint(c: c_int) -> c_int;
        pub fn ispunct(c: c_int) -> c_int;
        pub fn isspace(c: c_int) -> c_int;
        pub fn isupper(c: c_int) -> c_int;
        pub fn isxdigit(c: c_int) -> c_int;
        pub fn tolower(c: c_int) -> c_int;
        pub fn toupper(c: c_int) -> c_int;

        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "fopen$UNIX2003")]
        pub fn fopen(filename: *const c_char,
                     mode: *const c_char) -> *mut FILE;
        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "freopen$UNIX2003")]
        pub fn freopen(filename: *const c_char, mode: *const c_char,
                       file: *mut FILE) -> *mut FILE;
        pub fn fflush(file: *mut FILE) -> c_int;
        pub fn fclose(file: *mut FILE) -> c_int;
        pub fn remove(filename: *const c_char) -> c_int;
        pub fn rename(oldname: *const c_char, newname: *const c_char) -> c_int;
        pub fn tmpfile() -> *mut FILE;
        pub fn setvbuf(stream: *mut FILE,
                       buffer: *mut c_char,
                       mode: c_int,
                       size: size_t) -> c_int;
        pub fn setbuf(stream: *mut FILE, buf: *mut c_char);
        pub fn fgetc(stream: *mut FILE) -> c_int;
        pub fn fgets(buf: *mut c_char, n: c_int, stream: *mut FILE) -> *mut c_char;
        pub fn fputc(c: c_int, stream: *mut FILE) -> c_int;
        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "fputs$UNIX2003")]
        pub fn fputs(s: *const c_char, stream: *mut FILE)-> c_int;
        pub fn puts(s: *const c_char) -> c_int;
        pub fn ungetc(c: c_int, stream: *mut FILE) -> c_int;
        pub fn fread(ptr: *mut c_void,
                     size: size_t,
                     nobj: size_t,
                     stream: *mut FILE)
                     -> size_t;
        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "fwrite$UNIX2003")]
        pub fn fwrite(ptr: *const c_void,
                      size: size_t,
                      nobj: size_t,
                      stream: *mut FILE)
                      -> size_t;
        pub fn fseek(stream: *mut FILE, offset: c_long, whence: c_int) -> c_int;
        pub fn ftell(stream: *mut FILE) -> c_long;
        pub fn rewind(stream: *mut FILE);
        #[cfg_attr(target_os = "netbsd", link_name = "__fgetpos50")]
        pub fn fgetpos(stream: *mut FILE, ptr: *mut fpos_t) -> c_int;
        #[cfg_attr(target_os = "netbsd", link_name = "__fsetpos50")]
        pub fn fsetpos(stream: *mut FILE, ptr: *const fpos_t) -> c_int;
        pub fn feof(stream: *mut FILE) -> c_int;
        pub fn ferror(stream: *mut FILE) -> c_int;
        pub fn perror(s: *const c_char);
        pub fn atoi(s: *const c_char) -> c_int;
        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "strtod$UNIX2003")]
        pub fn strtod(s: *const c_char, endp: *mut *mut c_char) -> c_double;
        pub fn strtol(s: *const c_char,
                      endp: *mut *mut c_char, base: c_int) -> c_long;
        pub fn strtoul(s: *const c_char, endp: *mut *mut c_char,
                       base: c_int) -> c_ulong;
        pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
        pub fn malloc(size: size_t) -> *mut c_void;
        pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
        pub fn free(p: *mut c_void);
        pub fn abort() -> !;
        pub fn exit(status: c_int) -> !;
        pub fn _exit(status: c_int) -> !;
        pub fn atexit(cb: extern fn()) -> c_int;
        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "system$UNIX2003")]
        pub fn system(s: *const c_char) -> c_int;
        pub fn getenv(s: *const c_char) -> *mut c_char;

        pub fn strcpy(dst: *mut c_char, src: *const c_char) -> *mut c_char;
        pub fn strncpy(dst: *mut c_char, src: *const c_char, n: size_t)
                       -> *mut c_char;
        pub fn strcat(s: *mut c_char, ct: *const c_char) -> *mut c_char;
        pub fn strncat(s: *mut c_char, ct: *const c_char, n: size_t) -> *mut c_char;
        pub fn strcmp(cs: *const c_char, ct: *const c_char) -> c_int;
        pub fn strncmp(cs: *const c_char, ct: *const c_char, n: size_t) -> c_int;
        pub fn strcoll(cs: *const c_char, ct: *const c_char) -> c_int;
        pub fn strchr(cs: *const c_char, c: c_int) -> *mut c_char;
        pub fn strrchr(cs: *const c_char, c: c_int) -> *mut c_char;
        pub fn strspn(cs: *const c_char, ct: *const c_char) -> size_t;
        pub fn strcspn(cs: *const c_char, ct: *const c_char) -> size_t;
        pub fn strpbrk(cs: *const c_char, ct: *const c_char) -> *mut c_char;
        pub fn strstr(cs: *const c_char, ct: *const c_char) -> *mut c_char;
        pub fn strlen(cs: *const c_char) -> size_t;
        pub fn strnlen(cs: *const c_char, maxlen: size_t) -> size_t;
        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "strerror$UNIX2003")]
        pub fn strerror(n: c_int) -> *mut c_char;
        pub fn strtok(s: *mut c_char, t: *const c_char) -> *mut c_char;
        pub fn strxfrm(s: *mut c_char, ct: *const c_char, n: size_t) -> size_t;
        pub fn wcslen(buf: *const wchar_t) -> size_t;

        pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
        pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
    }

    // These are all inline functions on android, so they end up just being entirely
    // missing on that platform.
    #[cfg(not(target_os = "android"))]
    extern {
        pub fn abs(i: c_int) -> c_int;
        pub fn atof(s: *const c_char) -> c_double;
        pub fn labs(i: c_long) -> c_long;
        pub fn rand() -> c_int;
        pub fn srand(seed: c_uint);
    }

    cfg_if! {
        if #[cfg(windows)] {
            mod windows;
            pub use windows::*;
        } else if #[cfg(unix)] {
            mod unix;
            pub use unix::*;
        } else {
            // Unknown target_family
        }
    }

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