#
#
#           The Nim Compiler
#        (c) Copyright 2012 Andreas Rumpf
#
#    See the file "copying.txt", included in this
#    distribution, for details about the copyright.
#

# This module contains data about the different processors
# and operating systems.
# Note: Unfortunately if an OS or CPU is listed here this does not mean that
# Nim has been tested on this platform or that the RTL has been ported.
# Feel free to test for your excentric platform!

import
  strutils

type
  TSystemOS* = enum # Also add OS in initialization section and alias
                    # conditionals to condsyms (end of module).
    osNone, osDos, osWindows, osOs2, osLinux, osMorphos, osSkyos, osSolaris,
    osIrix, osNetbsd, osFreebsd, osOpenbsd, osDragonfly, osAix, osPalmos, osQnx,
    osAmiga, osAtari, osNetware, osMacos, osMacosx, osIos, osHaiku, osAndroid, osVxWorks
    osGenode, osJS, osNimVM, osStandalone, osNintendoSwitch

type
  TInfoOSProp* = enum
    ospNeedsPIC,              # OS needs PIC for libraries
    ospCaseInsensitive,       # OS filesystem is case insensitive
    ospPosix,                 # OS is posix-like
    ospLacksThreadVars        # OS lacks proper __threadvar support
  TInfoOSProps* = set[TInfoOSProp]
  TInfoOS* = tuple[name: string, parDir: string, dllFrmt: string,
                   altDirSep: string, objExt: string, newLine: string,
                   pathSep: string, dirSep: string, scriptExt: string,
                   curDir: string, exeExt: string, extSep: string,
                   props: TInfoOSProps]

const
  OS*: array[succ(low(TSystemOS))..high(TSystemOS), TInfoOS] = [
     (name: "DOS",
      parDir: "..", dllFrmt: "$1.dll", altDirSep: "/", objExt: ".obj",
      newLine: "\x0D\x0A", pathSep: ";", dirSep: "\\", scriptExt: ".bat",
      curDir: ".", exeExt: ".exe", extSep: ".", props: {ospCaseInsensitive}),
     (name: "Windows", parDir: "..", dllFrmt: "lib$1.dll", altDirSep: "/", 
      objExt: ".a", newLine: "\x0D\x0A", pathSep: ";", dirSep: "\\", 
      scriptExt: ".cmd", curDir: ".", exeExt: ".exe", extSep: ".", 
      props: {ospCaseInsensitive}),
     (name: "OS2", parDir: "..",
      dllFrmt: "$1.dll", altDirSep: "/",
      objExt: ".obj", newLine: "\x0D\x0A",
      pathSep: ";", dirSep: "\\",
      scriptExt: ".bat", curDir: ".",
      exeExt: ".exe", extSep: ".",
      props: {ospCaseInsensitive}),
     (name: "Linux", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "MorphOS", parDir: "..",
      dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A",
      pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "SkyOS", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "Solaris", parDir: "..",
      dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A",
      pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "Irix", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "NetBSD", parDir: "..",
      dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A",
      pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "FreeBSD", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "OpenBSD", parDir: "..",
      dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A",
      pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "DragonFly", parDir: "..",
      dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A",
      pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "AIX", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "PalmOS", parDir: "..",
      dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A",
      pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".",
      props: {ospNeedsPIC}),
     (name: "QNX",
      parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/", objExt: ".o",
      newLine: "\x0A", pathSep: ":", dirSep: "/", scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".", props: {ospNeedsPIC, ospPosix}),
     (name: "Amiga",
      parDir: "..", dllFrmt: "$1.library", altDirSep: "/", objExt: ".o",
      newLine: "\x0A", pathSep: ":", dirSep: "/", scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".", props: {ospNeedsPIC}),
     (name: "Atari",
      parDir: "..", dllFrmt: "$1.dll", altDirSep: "/", objExt: ".o",
      newLine: "\x0A", pathSep: ":", dirSep: "/", scriptExt: "", curDir: ".",
      exeExt: ".tpp", extSep: ".", props: {ospNeedsPIC}),
     (name: "Netware",
      parDir: "..", dllFrmt: "$1.nlm", altDirSep: "/", objExt: "",
      newLine: "\x0D\x0A", pathSep: ":", dirSep: "/", scriptExt: ".sh",
      curDir: ".", exeExt: ".nlm", extSep: ".", props: {ospCaseInsensitive}),
     (name: "MacOS", parDir: "::", dllFrmt: "$1Lib", altDirSep: ":",
      objExt: ".o", newLine: "\x0D", pathSep: ",", dirSep: ":", scriptExt: "",
      curDir: ":", exeExt: "", extSep: ".", props: {ospCaseInsensitive}),
     (name: "MacOSX", parDir: "..", dllFrmt: "lib$1.dylib", altDirSep: ":",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix, ospLacksThreadVars}),
     (name: "iOS", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "Haiku", parDir: "..", dllFrmt: "lib$1.so", altDirSep: ":",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix, ospLacksThreadVars}),
     (name: "Android", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     (name: "VxWorks", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ";", dirSep: "\\",
      scriptExt: ".sh", curDir: ".", exeExt: ".vxe", extSep: ".",
      props: {ospNeedsPIC, ospPosix, ospLacksThreadVars}),
     (name: "Genode", pardir: "..", dllFrmt: "$1.lib.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: "", curDir: "/", exeExt: "", extSep: ".",
      props: {ospNeedsPIC, ospLacksThreadVars}),

     (name: "JS", parDir: "..",
      dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A",
      pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".",
      exeExt: "", extSep: ".", props: {}),
     (name: "NimVM", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".", props: {}),
     (name: "Standalone", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: "", extSep: ".",
      props: {}),
     (name: "NintendoSwitch", parDir: "..", dllFrmt: "lib$1.so", altDirSep: "/",
      objExt: ".o", newLine: "\x0A", pathSep: ":", dirSep: "/",
      scriptExt: ".sh", curDir: ".", exeExt: ".elf", extSep: ".",
      props: {ospNeedsPIC, ospPosix}),
     ]

type
  TSystemCPU* = enum # Also add CPU for in initialization section and
                     # alias conditionals to condsyms (end of module).
    cpuNone, cpuI386, cpuM68k, cpuAlpha, cpuPowerpc, cpuPowerpc64,
    cpuPowerpc64el, cpuSparc, cpuVm, cpuIa64, cpuAmd64, cpuMips, cpuMipsel,
    cpuArm, cpuArm64, cpuJS, cpuNimVM, cpuAVR, cpuMSP430, cpuSparc64,
    cpuMips64, cpuMips64el, cpuRiscV64, cpuWasm32

type
  TEndian* = enum
    littleEndian, bigEndian
  TInfoCPU* = tuple[name: string, intSize: int, endian: TEndian,
                    floatSize, bit: int]

const
  EndianToStr*: array[TEndian, string] = ["littleEndian", "bigEndian"]
  CPU*: array[succ(low(TSystemCPU))..high(TSystemCPU), TInfoCPU] = [
    (name: "i386", intSize: 32, endian: littleEndian, floatSize: 64, bit: 32),
    (name: "m68k", intSize: 32, endian: bigEndian, floatSize: 64, bit: 32),
    (name: "alpha", intSize: 64, endian: littleEndian, floatSize: 64, bit: 64),
    (name: "powerpc", intSize: 32, endian: bigEndian, floatSize: 64, bit: 32),
    (name: "powerpc64", intSize: 64, endian: bigEndian, floatSize: 64,bit: 64),
    (name: "powerpc64el", intSize: 64, endian: littleEndian, floatSize: 64,bit: 64),
    (name: "sparc", intSize: 32, endian: bigEndian, floatSize: 64, bit: 32),
    (name: "vm", intSize: 32, endian: littleEndian, floatSize: 64, bit: 32),
    (name: "ia64", intSize: 64, endian: littleEndian, floatSize: 64, bit: 64),
    (name: "amd64", intSize: 64, endian: littleEndian, floatSize: 64, bit: 64),
    (name: "mips", intSize: 32, endian: bigEndian, floatSize: 64, bit: 32),
    (name: "mipsel", intSize: 32, endian: littleEndian, floatSize: 64, bit: 32),
    (name: "arm", intSize: 32, endian: littleEndian, floatSize: 64, bit: 32),
    (name: "arm64", intSize: 64, endian: littleEndian, floatSize: 64, bit: 64),
    (name: "js", intSize: 32, endian: bigEndian,floatSize: 64,bit: 32),
    (name: "nimvm", intSize: 32, endian: bigEndian, floatSize: 64, bit: 32),
    (name: "avr", intSize: 16, endian: littleEndian, floatSize: 32, bit: 16),
    (name: "msp430", intSize: 16, endian: littleEndian, floatSize: 32, bit: 16),
    (name: "sparc64", intSize: 64, endian: bigEndian, floatSize: 64, bit: 64),
    (name: "mips64", intSize: 64, endian: bigEndian, floatSize: 64, bit: 64),
    (name: "mips64el", intSize: 64, endian: littleEndian, floatSize: 64, bit: 64),
    (name: "riscv64", intSize: 64, endian: littleEndian, floatSize: 64, bit: 64),
    (name: "wasm32", intSize: 32, endian: littleEndian, floatSize: 64, bit: 32)]

type
  Target* = object
    targetCPU*, hostCPU*: TSystemCPU
    targetOS*, hostOS*: TSystemOS
    intSize*: int
    floatSize*: int
    ptrSize*: int
    tnl*: string                # target newline

proc setTarget*(t: var Target; o: TSystemOS, c: TSystemCPU) =
  assert(c != cpuNone)
  assert(o != osNone)
  #echo "new Target: OS: ", o, " CPU: ", c
  t.targetCPU = c
  t.targetOS = o
  t.intSize = CPU[c].intSize div 8
  t.floatSize = CPU[c].floatSize div 8
  t.ptrSize = CPU[c].bit div 8
  t.tnl = OS[o].newLine

proc nameToOS*(name: string): TSystemOS =
  for i in succ(osNone) .. high(TSystemOS):
    if cmpIgnoreStyle(name, OS[i].name) == 0:
      return i
  result = osNone

proc listOSnames*(): seq[string] =
  for i in succ(osNone) .. high(TSystemOS):
    result.add OS[i].name

proc nameToCPU*(name: string): TSystemCPU =
  for i in succ(cpuNone) .. high(TSystemCPU):
    if cmpIgnoreStyle(name, CPU[i].name) == 0:
      return i
  result = cpuNone

proc listCPUnames*(): seq[string] =
  for i in succ(cpuNone) .. high(TSystemCPU):
    result.add CPU[i].name

proc setTargetFromSystem*(t: var Target) =
  t.hostOS = nameToOS(system.hostOS)
  t.hostCPU = nameToCPU(system.hostCPU)
  t.setTarget(t.hostOS, t.hostCPU)
