#
#
# Nimrod's Runtime Library
# (c) Copyright 2013 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
# Implementation of some runtime checks.
proc raiseRangeError(val: BiggestInt) {.compilerproc, noreturn, noinline.} =
when hostOS == "standalone":
sysFatal(EOutOfRange, "value out of range")
else:
sysFatal(EOutOfRange, "value out of range: ", $val)
proc raiseIndexError() {.compilerproc, noreturn, noinline.} =
sysFatal(EInvalidIndex, "index out of bounds")
proc raiseFieldError(f: string) {.compilerproc, noreturn, noinline.} =
sysFatal(EInvalidField, f, " 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:
when hostOS == "standalone":
sysFatal(EOutOfRange, "value out of range")
else:
sysFatal(EOutOfRange, "value out of range: ", $x)
proc chckNil(p: pointer) =
if p == nil:
sysFatal(EInvalidValue, "attempt to write to a nil address")
#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:
sysFatal(EInvalidObjectConversion, "invalid object conversion")
break
x = x.base
proc chckObjAsgn(a, b: PNimType) {.compilerproc, inline.} =
if a != b:
sysFatal(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