#
#
# The Nim Compiler
# (c) Copyright 2015 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
import pathutils
when defined(nimPreviewSlimSystem):
import std/assertions
template setX(k, field) {.dirty.} =
a.slots[a.ra].ensureKind(k)
a.slots[a.ra].field = v
proc setResult*(a: VmArgs; v: BiggestInt) = setX(rkInt, intVal)
proc setResult*(a: VmArgs; v: BiggestFloat) = setX(rkFloat, floatVal)
proc setResult*(a: VmArgs; v: bool) =
let v = v.ord
setX(rkInt, intVal)
proc setResult*(a: VmArgs; v: string) =
a.slots[a.ra].ensureKind(rkNode)
a.slots[a.ra].node = newNode(nkStrLit)
a.slots[a.ra].node.strVal = v
proc setResult*(a: VmArgs; n: PNode) =
a.slots[a.ra].ensureKind(rkNode)
a.slots[a.ra].node = n
proc setResult*(a: VmArgs; v: AbsoluteDir) = setResult(a, v.string)
proc setResult*(a: VmArgs; v: seq[string]) =
a.slots[a.ra].ensureKind(rkNode)
var n = newNode(nkBracket)
for x in v: n.add newStrNode(nkStrLit, x)
a.slots[a.ra].node = n
template getReg(a, i): untyped =
doAssert i < a.rc-1
a.slots[i+a.rb+1].unsafeAddr
template getX(k, field): untyped {.dirty.} =
let p = getReg(a, i)
doAssert p.kind == k, $p.kind
p.field
proc numArgs*(a: VmArgs): int =
result = a.rc-1
proc getInt*(a: VmArgs; i: Natural): BiggestInt = getX(rkInt, intVal)
proc getBool*(a: VmArgs; i: Natural): bool = getInt(a, i) != 0
proc getFloat*(a: VmArgs; i: Natural): BiggestFloat = getX(rkFloat, floatVal)
proc getNode*(a: VmArgs; i: Natural): PNode = getX(rkNode, node)
proc getString*(a: VmArgs; i: Natural): string = getX(rkNode, node).strVal
proc getVar*(a: VmArgs; i: Natural): PNode =
let p = getReg(a, i)
# depending on whether we come from top-level or proc scope, we need to consider 2 cases
case p.kind
of rkRegisterAddr: result = p.regAddr.node
of rkNodeAddr: result = p.nodeAddr[]
else: doAssert false, $p.kind
proc getNodeAddr*(a: VmArgs; i: Natural): PNode =
let nodeAddr = getX(rkNodeAddr, nodeAddr)
doAssert nodeAddr != nil
result = nodeAddr[]