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#
#
# Nimrod's Runtime Library
# (c) Copyright 2012 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
# Bare-bones implementation of some things for embedded targets.
proc writeToStdErr(msg: CString) = write(stdout, msg)
proc chckIndx(i, a, b: int): int {.inline, compilerproc.}
proc chckRange(i, a, b: int): int {.inline, compilerproc.}
proc chckRangeF(x, a, b: float): float {.inline, compilerproc.}
proc chckNil(p: pointer) {.inline, compilerproc.}
proc pushFrame(s: PFrame) {.compilerRtl, inl.} = nil
proc popFrame {.compilerRtl, inl.} = nil
proc setFrame(s: PFrame) {.compilerRtl, inl.} = nil
proc pushSafePoint(s: PSafePoint) {.compilerRtl, inl.} = nil
proc popSafePoint {.compilerRtl, inl.} = nil
proc pushCurrentException(e: ref E_Base) {.compilerRtl, inl.} = nil
proc popCurrentException {.compilerRtl, inl.} = nil
# some platforms have native support for stack traces:
const
nativeStackTraceSupported = false
hasSomeStackTrace = false
proc quitOrDebug() {.inline.} =
quit(1)
proc raiseException(e: ref E_Base, ename: CString) {.compilerRtl.} =
writeToStdErr(ename)
proc reraiseException() {.compilerRtl.} =
writeToStdErr("reraise not supported")
proc WriteStackTrace() = nil
proc setControlCHook(hook: proc () {.noconv.}) =
# ugly cast, but should work on all architectures:
type TSignalHandler = proc (sig: cint) {.noconv.}
c_signal(SIGINT, cast[TSignalHandler](hook))
proc raiseRangeError(val: biggestInt) {.compilerproc, noreturn, noinline.} =
writeToStdErr("value out of range")
proc raiseIndexError() {.compilerproc, noreturn, noinline.} =
writeToStdErr("index out of bounds")
proc raiseFieldError(f: string) {.compilerproc, noreturn, noinline.} =
writeToStdErr("field is not accessible")
proc chckIndx(i, a, b: int): int =
if i >= a and i <= b:
return i
else:
raiseIndexError()
proc chckRange(i, a, b: int): int =
if i >= a and i <= b:
return i
else:
raiseRangeError(i)
proc chckRange64(i, a, b: int64): int64 {.compilerproc.} =
if i >= a and i <= b:
return i
else:
raiseRangeError(i)
proc chckRangeF(x, a, b: float): float =
if x >= a and x <= b:
return x
else:
raise newException(EOutOfRange, "value " & $x & " out of range")
proc chckNil(p: pointer) =
if p == nil: c_raise(SIGSEGV)
proc chckObj(obj, subclass: PNimType) {.compilerproc.} =
# checks if obj is of type subclass:
var x = obj
if x == subclass: return # optimized fast path
while x != subclass:
if x == nil:
raise newException(EInvalidObjectConversion, "invalid object conversion")
x = x.base
proc chckObjAsgn(a, b: PNimType) {.compilerproc, inline.} =
if a != b:
raise newException(EInvalidObjectAssignment, "invalid object assignment")
proc isObj(obj, subclass: PNimType): bool {.compilerproc.} =
# checks if obj is of type subclass:
var x = obj
if x == subclass: return true # optimized fast path
while x != subclass:
if x == nil: return false
x = x.base
return true
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