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authorCarlo Capocasa <carlo@capocasa.net>2021-12-13 07:29:22 +0100
committerGitHub <noreply@github.com>2021-12-13 07:29:22 +0100
commit0ff4b2ba7ee74ed2758b0eb5992e4ccab7433952 (patch)
treeead0619e45e2af6d33dbfb9b70b20a590b29aba1 /lib/arch
parent4b5cecd902cc4126ff9d6cda9edb78a13a421239 (diff)
downloadNim-0ff4b2ba7ee74ed2758b0eb5992e4ccab7433952.tar.gz
fix bug #14468 zero-width split (#19248)
Diffstat (limited to 'lib/arch')
0 files changed, 0 insertions, 0 deletions
 

generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2025-06-17 15:28:43 +0000


 


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#
#
#            Nim's Runtime Library
#        (c) Copyright 2012 Andreas Rumpf
#
#    See the file "copying.txt", included in this
#    distribution, for details about the copyright.
#

## This module contains helpers that deal with different byte orders
## (`endian`:idx:).

proc swapEndian64*(outp, inp: pointer) =
  ## copies `inp` to `outp` swapping bytes. Both buffers are supposed to
  ## contain at least 8 bytes.
  var i = cast[cstring](inp)
  var o = cast[cstring](outp)
  o[0] = i[7]
  o[1] = i[6]
  o[2] = i[5]
  o[3] = i[4]
  o[4] = i[3]
  o[5] = i[2]
  o[6] = i[1]
  o[7] = i[0]

proc swapEndian32*(outp, inp: pointer) = 
  ## copies `inp` to `outp` swapping bytes. Both buffers are supposed to
  ## contain at least 4 bytes.
  var i = cast[cstring](inp)
  var o = cast[cstring](outp)
  o[0] = i[3]
  o[1] = i[2]
  o[2] = i[1]
  o[3] = i[0]

proc swapEndian16*(outp, inp: pointer) = 
  ## copies `inp` to `outp` swapping bytes. Both buffers are supposed to
  ## contain at least 2 bytes.
  var
    i = cast[cstring](inp)
    o = cast[cstring](outp)
  o[0] = i[1]
  o[1] = i[0]

when system.cpuEndian == bigEndian:
  proc littleEndian64*(outp, inp: pointer) {.inline.} = swapEndian64(outp, inp)
  proc littleEndian32*(outp, inp: pointer) {.inline.} = swapEndian32(outp, inp)
  proc littleEndian16*(outp, inp: pointer) {.inline.} = swapEndian16(outp, inp)
  proc bigEndian64*(outp, inp: pointer) {.inline.} = copyMem(outp, inp, 8)
  proc bigEndian32*(outp, inp: pointer) {.inline.} = copyMem(outp, inp, 4)
  proc bigEndian16*(outp, inp: pointer) {.inline.} = copyMem(outp, inp, 2)
else: 
  proc littleEndian64*(outp, inp: pointer) {.inline.} = copyMem(outp, inp, 8)
  proc littleEndian32*(outp, inp: pointer) {.inline.} = copyMem(outp, inp, 4)
  proc littleEndian16*(outp, inp: pointer){.inline.} = copyMem(outp, inp, 2)
  proc bigEndian64*(outp, inp: pointer) {.inline.} = swapEndian64(outp, inp)
  proc bigEndian32*(outp, inp: pointer) {.inline.} = swapEndian32(outp, inp)
  proc bigEndian16*(outp, inp: pointer) {.inline.} = swapEndian16(outp, inp)