#
#
# The Nim Compiler
# (c) Copyright 2017 Andreas Rumpf
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
#
## The compiler can generate debuginfo to help debuggers in translating back
## from C/C++/JS code to Nim. The data structure has been designed to produce
## something useful with Nim's marshal module.
import sighashes
type
FilenameMapping* = object
package*, file*: string
mangled*: SigHash
EnumDesc* = object
size*: int
owner*: SigHash
id*: int
name*: string
values*: seq[(string, int)]
DebugInfo* = object
version*: int
files*: seq[FilenameMapping]
enums*: seq[EnumDesc]
conflicts*: bool
proc sdbmHash(package, file: string): SigHash =
result = 0
for i in 0..<package.len:
result &= package[i]
result &= '.'
for i in 0..<file.len:
result &= file[i]
proc register*(self: var DebugInfo; package, file: string): SigHash =
result = sdbmHash(package, file)
for f in self.files:
if f.mangled == result:
if f.package == package and f.file == file: return
self.conflicts = true
break
self.files.add(FilenameMapping(package: package, file: file, mangled: result))
proc hasEnum*(self: DebugInfo; ename: string; id: int; owner: SigHash): bool =
for en in self.enums:
if en.owner == owner and en.name == ename and en.id == id: return true
proc registerEnum*(self: var DebugInfo; ed: EnumDesc) =
self.enums.add ed
proc init*(self: var DebugInfo) =
self.version = 1
self.files = @[]
self.enums = @[]
var gDebugInfo*: DebugInfo
debuginfo.init gDebugInfo
import marshal, streams
proc writeDebugInfo*(self: var DebugInfo; file: string) =
let s = newFileStream(file, fmWrite)
store(s, self)
s.close
proc writeDebugInfo*(file: string) = writeDebugInfo(gDebugInfo, file)
proc loadDebugInfo*(self: var DebugInfo; file: string) =
let s = newFileStream(file, fmRead)
load(s, self)
s.close
proc loadDebugInfo*(file: string) = loadDebugInfo(gDebugInfo, file)