require 'ffi/platform'
require 'ffi/tools/struct_generator'
require 'ffi/tools/const_generator'
require 'ffi/tools/types_generator'

deps = %w[Rakefile] + Dir['lib/ffi/*rb']

#file PLATFORM_CONF => deps do |task|
#  gen_platform_conf task
#end
def gen_platform_conf(task, options = {})
  FFI::StructGenerator.options = options
  FFI::ConstGenerator.options = options
  
  addrinfo = FFI::StructGenerator.new 'addrinfo' do |s|
    s.include 'sys/types.h'
    s.include 'sys/socket.h'
    s.include 'netdb.h'
    s.name 'struct addrinfo'
    s.field :ai_flags, :int
    s.field :ai_family, :int
    s.field :ai_socktype, :int
    s.field :ai_protocol, :int
    s.field :ai_addrlen, :int
    s.field :ai_addr, :pointer
    s.field :ai_canonname, :string
    s.field :ai_next, :pointer
  end unless FFI::Platform::IS_WINDOWS

  dirent = FFI::StructGenerator.new 'dirent' do |s|
    s.include "sys/types.h"
    s.include "dirent.h"
    s.name 'struct dirent'
    s.field :d_ino, :ino_t
    s.field :d_reclen, :ushort unless FFI::Platform::IS_WINDOWS
    s.field :d_name, :char_array
  end

  timeval = FFI::StructGenerator.new 'timeval' do |s|
    s.include "sys/time.h"
    s.name 'struct timeval'
    s.field :tv_sec, :time_t
    s.field :tv_usec, :suseconds_t
  end

  sockaddr_in = FFI::StructGenerator.new 'sockaddr_in' do |s|
    s.include "netinet/in.h"
    s.include "fcntl.h"
    s.include "sys/socket.h"
    s.include "sys/stat.h"
    s.name 'struct sockaddr_in'
    s.field :sin_family, :sa_family_t
    s.field :sin_port, :ushort
    s.field :sin_addr
    s.field :sin_zero, :char_array
  end

  sockaddr_un = FFI::StructGenerator.new 'sockaddr_un' do |s|
    s.include "sys/un.h"
    s.name 'struct sockaddr_un'
    s.field :sun_family, :sa_family_t
    s.field :sun_path, :char_array
  end

  servent = FFI::StructGenerator.new 'servent' do |s|
    s.include "netdb.h"
    s.name 'struct servent'
    s.field :s_name, :pointer
    s.field :s_aliases, :pointer
    s.field :s_port, :int
    s.field :s_proto, :pointer
  end

  stat = FFI::StructGenerator.new 'stat' do |s|
    s.include "sys/types.h"
    s.include "sys/stat.h"
    s.name 'struct stat'
    s.field :st_dev, :dev_t
    s.field :st_ino, :ino_t
    s.field :st_mode, :mode_t
    s.field :st_nlink, :nlink_t
    s.field :st_uid, :uid_t
    s.field :st_gid, :gid_t
    s.field :st_rdev, :dev_t
    s.field :st_size, :off_t
    s.field :st_blksize
    s.field :st_blocks
    s.field :st_atime, :time_t
    s.field :st_mtime, :time_t
    s.field :st_ctime, :time_t
  end

  rlimit = FFI::StructGenerator.new 'rlimit' do |s|
    s.include "sys/types.h"
    s.include "sys/time.h"
    s.include "sys/resource.h"
    s.name 'struct rlimit'
    s.field :rlim_cur, :rlim_t
    s.field :rlim_max, :rlim_t
  end

  # FIXME these constants don't have standard names.  LOCK_SH == Linux,
  # O_SHLOCK on Bsd/Darwin, etc.  Binary doesn't exist at all in many non-Unix
  # variants.  This should come out of something like config.h

  fixme_constants = %w{
    LOCK_SH
    LOCK_EX
    LOCK_NB
    LOCK_UN
    BINARY
  }

  file_cg = FFI::ConstGenerator.new 'rbx.platform.file' do |cg|
    cg.include 'stdio.h'
    cg.include 'fcntl.h'
    cg.include 'sys/stat.h'

    file_constants = %w[
      O_RDONLY
      O_WRONLY
      O_RDWR
      O_CREAT
      O_EXCL
      O_NOCTTY
      O_TRUNC
      O_APPEND
      O_NONBLOCK
      O_SYNC
      S_IRUSR
      S_IWUSR
      S_IXUSR
      S_IRGRP
      S_IWGRP
      S_IXGRP
      S_IROTH
      S_IWOTH
      S_IXOTH
      S_IFMT
      S_IFIFO
      S_IFCHR
      S_IFDIR
      S_IFBLK
      S_IFREG
      S_IFLNK
      S_IFSOCK
      S_IFWHT
      S_ISUID
      S_ISGID
    ]

    file_constants.each { |c| cg.const c }
  end

  io_cg = FFI::ConstGenerator.new 'rbx.platform.io' do |cg|
    cg.include 'stdio.h'

    io_constants = %w[
      SEEK_SET
      SEEK_CUR
      SEEK_END
    ]

    io_constants.each { |c| cg.const c }
  end

  # Only constants needed by core are added here
  fcntl_cg = FFI::ConstGenerator.new 'rbx.platform.fcntl' do |cg|
    cg.include 'fcntl.h'

    fcntl_constants = %w[
      F_GETFL
      F_SETFL
      O_ACCMODE
    ]

    fcntl_constants.each { |c| cg.const c }
  end

  socket_cg = FFI::ConstGenerator.new 'rbx.platform.socket' do |cg|
    cg.include 'sys/types.h'
    cg.include 'sys/socket.h'
    cg.include 'netdb.h'
    cg.include 'netinet/tcp.h'
    cg.include 'netinet/in.h'

    socket_constants = %w[
      AF_APPLETALK
      AF_ATM
      AF_AX25
      AF_CCITT
      AF_CHAOS
      AF_CNT
      AF_COIP
      AF_DATAKIT
      AF_DEC
      AF_DLI
      AF_E164
      AF_ECMA
      AF_HYLINK
      AF_IMPLINK
      AF_INET
      AF_INET6
      AF_IPX
      AF_ISDN
      AF_ISO
      AF_LAT
      AF_LINK
      AF_LOCAL
      AF_MAX
      AF_NATM
      AF_NDRV
      AF_NETBIOS
      AF_NETGRAPH
      AF_NS
      AF_OSI
      AF_PPP
      AF_PUP
      AF_ROUTE
      AF_SIP
      AF_SNA
      AF_SYSTEM
      AF_UNIX
      AF_UNSPEC

      AI_ADDRCONFIG
      AI_ALL
      AI_CANONNAME
      AI_DEFAULT
      AI_MASK
      AI_NUMERICHOST
      AI_PASSIVE
      AI_V4MAPPED
      AI_V4MAPPED_CFG

      EAI_ADDRFAMILY
      EAI_AGAIN
      EAI_BADFLAGS
      EAI_BADHINTS
      EAI_FAIL
      EAI_FAMILY
      EAI_MAX
      EAI_MEMORY
      EAI_NODATA
      EAI_NONAME
      EAI_PROTOCOL
      EAI_SERVICE
      EAI_SOCKTYPE
      EAI_SYSTEM

      INADDR_ALLHOSTS_GROUP
      INADDR_ANY
      INADDR_BROADCAST
      INADDR_LOOPBACK
      INADDR_MAX_LOCAL_GROUP
      INADDR_NONE
      INADDR_UNSPEC_GROUP

      IPPORT_RESERVED
      IPPORT_USERRESERVED

      IPPROTO_BIP
      IPPROTO_EGP
      IPPROTO_EON
      IPPROTO_GGP
      IPPROTO_HELLO
      IPPROTO_ICMP
      IPPROTO_IDP
      IPPROTO_IGMP
      IPPROTO_IP
      IPPROTO_MAX
      IPPROTO_ND
      IPPROTO_PUP
      IPPROTO_RAW
      IPPROTO_TCP
      IPPROTO_TP
      IPPROTO_UDP
      IPPROTO_XTP

      IPX_TYPE

      IP_ADD_MEMBERSHIP
      IP_DEFAULT_MULTICAST_LOOP
      IP_DEFAULT_MULTICAST_TTL
      IP_DROP_MEMBERSHIP
      IP_HDRINCL
      IP_MAX_MEMBERSHIPS
      IP_MULTICAST_IF
      IP_MULTICAST_LOOP
      IP_MULTICAST_TTL
      IP_OPTIONS
      IP_RECVDSTADDR
      IP_RECVOPTS
      IP_RECVRETOPTS
      IP_RETOPTS
      IP_TOS
      IP_TTL

      MSG_COMPAT
      MSG_CTRUNC
      MSG_DONTROUTE
      MSG_DONTWAIT
      MSG_EOF
      MSG_EOR
      MSG_FLUSH
      MSG_HAVEMORE
      MSG_HOLD
      MSG_OOB
      MSG_PEEK
      MSG_RCVMORE
      MSG_SEND
      MSG_TRUNC
      MSG_WAITALL

      NI_DGRAM
      NI_MAXHOST
      NI_MAXSERV
      NI_NAMEREQD
      NI_NOFQDN
      NI_NUMERICHOST
      NI_NUMERICSERV

      PF_APPLETALK
      PF_AX25
      PF_CCITT
      PF_CHAOS
      PF_CNT
      PF_COIP
      PF_DATAKIT
      PF_DLI
      PF_ECMA
      PF_HYLINK
      PF_IMPLINK
      PF_INET
      PF_INET6
      PF_IPX
      PF_ISDN
      PF_ISO
      PF_KEY
      PF_LAT
      PF_LINK
      PF_LOCAL
      PF_MAX
      PF_NATM
      PF_NDRV
      PF_NETBIOS
      PF_NETGRAPH
      PF_NS
      PF_OSI
      PF_PIP
      PF_PPP
      PF_PUP
      PF_ROUTE
      PF_RTIP
      PF_SIP
      PF_SNA
      PF_SYSTEM
      PF_UNIX
      PF_UNSPEC
      PF_XTP

      SHUT_RD
      SHUT_RDWR
      SHUT_WR

      SOCK_DGRAM
      SOCK_PACKET
      SOCK_RAW
      SOCK_RDM
      SOCK_SEQPACKET
      SOCK_STREAM

      SOL_ATALK
      SOL_AX25
      SOL_IP
      SOL_IPX
      SOL_SOCKET
      SOL_TCP
      SOL_UDP

      SOPRI_BACKGROUND
      SOPRI_INTERACTIVE
      SOPRI_NORMAL

      SO_ACCEPTCONN
      SO_ACCEPTFILTER
      SO_ATTACH_FILTER
      SO_BINDTODEVICE
      SO_BROADCAST
      SO_DEBUG
      SO_DETACH_FILTER
      SO_DONTROUTE
      SO_DONTTRUNC
      SO_ERROR
      SO_KEEPALIVE
      SO_LINGER
      SO_NKE
      SO_NOSIGPIPE
      SO_NO_CHECK
      SO_NREAD
      SO_OOBINLINE
      SO_PASSCRED
      SO_PEERCRED
      SO_PEERNAME
      SO_PRIORITY
      SO_RCVBUF
      SO_RCVLOWAT
      SO_RCVTIMEO
      SO_REUSEADDR
      SO_REUSEPORT
      SO_SECURITY_AUTHENTICATION
      SO_SECURITY_ENCRYPTION_NETWORK
      SO_SECURITY_ENCRYPTION_TRANSPORT
      SO_SNDBUF
      SO_SNDLOWAT
      SO_SNDTIMEO
      SO_TIMESTAMP
      SO_TYPE
      SO_USELOOPBACK
      SO_WANTMORE
      SO_WANTOOBFLAG

      TCP_MAXSEG
      TCP_NODELAY
    ]

    socket_constants.each { |c| cg.const c, "%ld", '(long)' }
  end

  process_cg = FFI::ConstGenerator.new 'rbx.platform.process' do |cg|
    cg.include 'sys/wait.h'
    cg.include 'sys/resource.h'

    process_constants = %w{
      WNOHANG
      WUNTRACED
      PRIO_PROCESS
      PRIO_PGRP
      PRIO_USER
      RLIMIT_CPU
      RLIMIT_FSIZE
      RLIMIT_DATA
      RLIMIT_STACK
      RLIMIT_CORE
      RLIMIT_RSS
      RLIMIT_NPROC
      RLIMIT_NOFILE
      RLIMIT_MEMLOCK
      RLIMIT_AS
      RLIMIT_SBSIZE
    }

    process_constants.each { |c| cg.const c }

    long_process_constants = %w[
      RLIM_INFINITY
      RLIM_SAVED_MAX
      RLIM_SAVED_CUR
    ]

    long_process_constants.each { |c|
      cg.const c, "%llu", "(unsigned long long)"
    }
  end

  # The constants come from MRI's signal.c. This means that some of them might
  # be missing.

  signal_cg = FFI::ConstGenerator.new 'rbx.platform.signal' do |cg|
    cg.include 'signal.h'
    cg.include 'sys/signal.h'

    signal_constants = %w{
      SIGHUP
      SIGINT
      SIGQUIT
      SIGILL
      SIGTRAP
      SIGIOT
      SIGABRT
      SIGEMT
      SIGFPE
      SIGKILL
      SIGBUS
      SIGSEGV
      SIGSYS
      SIGPIPE
      SIGALRM
      SIGTERM
      SIGURG
      SIGSTOP
      SIGTSTP
      SIGCONT
      SIGCHLD
      SIGCLD
      SIGCHLD
      SIGTTIN
      SIGTTOU
      SIGIO
      SIGXCPU
      SIGXFSZ
      SIGVTALRM
      SIGPROF
      SIGWINCH
      SIGUSR1
      SIGUSR2
      SIGLOST
      SIGMSG
      SIGPWR
      SIGPOLL
      SIGDANGER
      SIGMIGRATE
      SIGPRE
      SIGGRANT
      SIGRETRACT
      SIGSOUND
      SIGINFO
    }

    signal_constants.each { |c| cg.const c }
  end

  zlib_cg = FFI::ConstGenerator.new 'rbx.platform.zlib' do |cg|
    cg.include 'zlib.h'

    zlib_constants = %w[ZLIB_VERSION]

    zlib_constants.each { |c| cg.const c, "%s", "(char *)" }
  end

  puts "Generating #{task.name}..." if $verbose

  File.open task.name, "w" do |f|
    addrinfo.dump_config f unless FFI::Platform::IS_WINDOWS
    dirent.dump_config f
    timeval.dump_config f
    sockaddr_in.dump_config f
    sockaddr_un.dump_config f if sockaddr_un.found?
    servent.dump_config f
    stat.dump_config f
    rlimit.dump_config f

    file_cg.dump_constants f
    io_cg.dump_constants f
    fcntl_cg.dump_constants f
    socket_cg.dump_constants f
    process_cg.dump_constants f
    signal_cg.dump_constants f
    zlib_cg.dump_constants f

    f.puts FFI::TypesGenerator.generate options
  end

end