1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
#
#
# 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, pathutils
var gFrontEndId*: 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: " & $id.id)
proc getID*(): int {.inline.} =
result = gFrontEndId
inc(gFrontEndId)
proc setId*(id: int) {.inline.} =
gFrontEndId = max(gFrontEndId, id + 1)
proc idSynchronizationPoint*(idRange: int) =
gFrontEndId = (gFrontEndId div idRange + 1) * idRange + 1
proc toGid(conf: ConfigRef; f: AbsoluteFile): string =
# we used to use ``f.addFileExt("gid")`` (aka ``$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(conf, AbsoluteFile"nim.gid").string
proc saveMaxIds*(conf: ConfigRef; project: AbsoluteFile) =
var f = open(toGid(conf, project), fmWrite)
f.writeLine($gFrontEndId)
f.close()
proc loadMaxIds*(conf: ConfigRef; project: AbsoluteFile) =
var f: File
if open(f, toGid(conf, project), 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)
f.close()
|