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#
#
# The Nimrod Compiler
# (c) Copyright 2012 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
# This module handles the conditional symbols.
import
ast, astalgo, msgs, hashes, platform, strutils, idents
var gSymbols*: TStrTable
proc DefineSymbol*(symbol: string) =
var i = getIdent(symbol)
var sym = StrTableGet(gSymbols, i)
if sym == nil:
new(sym) # circumvent the ID mechanism
sym.kind = skConditional
sym.name = i
StrTableAdd(gSymbols, sym)
sym.position = 1
proc UndefSymbol*(symbol: string) =
var sym = StrTableGet(gSymbols, getIdent(symbol))
if sym != nil: sym.position = 0
proc isDefined*(symbol: PIdent): bool =
var sym = StrTableGet(gSymbols, symbol)
result = sym != nil and sym.position == 1
proc isDefined*(symbol: string): bool =
result = isDefined(getIdent(symbol))
proc ListSymbols*() =
var it: TTabIter
var s = InitTabIter(it, gSymbols)
OutWriteln("-- List of currently defined symbols --")
while s != nil:
if s.position == 1: OutWriteln(s.name.s)
s = nextIter(it, gSymbols)
OutWriteln("-- End of list --")
proc countDefinedSymbols*(): int =
var it: TTabIter
var s = InitTabIter(it, gSymbols)
result = 0
while s != nil:
if s.position == 1: inc(result)
s = nextIter(it, gSymbols)
proc InitDefines*() =
initStrTable(gSymbols)
DefineSymbol("nimrod") # 'nimrod' is always defined
# for bootstrapping purposes and old code:
DefineSymbol("nimhygiene")
DefineSymbol("niminheritable")
# add platform specific symbols:
case targetCPU
of cpuI386: DefineSymbol("x86")
of cpuIa64: DefineSymbol("itanium")
of cpuAmd64: DefineSymbol("x8664")
else: nil
case targetOS
of osDOS:
DefineSymbol("msdos")
of osWindows:
DefineSymbol("mswindows")
DefineSymbol("win32")
of osLinux, osMorphOS, osSkyOS, osIrix, osPalmOS, osQNX, osAtari, osAix,
osHaiku:
# these are all 'unix-like'
DefineSymbol("unix")
DefineSymbol("posix")
of osSolaris:
DefineSymbol("sunos")
DefineSymbol("unix")
DefineSymbol("posix")
of osNetBSD, osFreeBSD, osOpenBSD:
DefineSymbol("unix")
DefineSymbol("bsd")
DefineSymbol("posix")
of osMacOS:
DefineSymbol("macintosh")
of osMacOSX:
DefineSymbol("macintosh")
DefineSymbol("unix")
DefineSymbol("posix")
else: nil
DefineSymbol("cpu" & $cpu[targetCPU].bit)
DefineSymbol(normalize(endianToStr[cpu[targetCPU].endian]))
DefineSymbol(cpu[targetCPU].name)
DefineSymbol(platform.os[targetOS].name)
if platform.OS[targetOS].props.contains(ospLacksThreadVars):
DefineSymbol("emulatedthreadvars")
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