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#
#
# 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 a simple persistent id generator.
import idents, strutils, os, options
var gFrontEndId, gBackendId*: int
const
debugIds* = false
when debugIds:
import intsets
var usedIds = initIntSet()
proc registerID*(id: PIdObj) =
when debugIds:
if id.id == -1 or containsOrIncl(usedIds, id.id):
internalError("ID already used: " & $id.id)
proc getID*(): int {.inline.} =
result = gFrontEndId
inc(gFrontEndId)
proc backendId*(): int {.inline.} =
result = gBackendId
inc(gBackendId)
proc setId*(id: int) {.inline.} =
gFrontEndId = max(gFrontEndId, id + 1)
proc idSynchronizationPoint*(idRange: int) =
gFrontEndId = (gFrontEndId div idRange + 1) * idRange + 1
proc toGid(f: string): string =
# we used to use ``f.addFileExt("gid")`` (aka ``$project.gid``), but this
# will cause strange bugs if multiple projects are in the same folder, so
# we simply use a project independent name:
result = options.completeGeneratedFilePath("nimrod.gid")
proc saveMaxIds*(project: string) =
var f = open(project.toGid, fmWrite)
f.writeln($gFrontEndId)
f.writeln($gBackendId)
f.close()
proc loadMaxIds*(project: string) =
var f: File
if open(f, project.toGid, fmRead):
var line = newStringOfCap(20)
if f.readLine(line):
var frontEndId = parseInt(line)
if f.readLine(line):
var backEndId = parseInt(line)
gFrontEndId = max(gFrontEndId, frontEndId)
gBackendId = max(gBackendId, backEndId)
f.close()
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