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| author | Billingsly Wetherfordshire <phowl.mouth@gmail.com> | 2013-12-23 11:52:11 -0600 |
|---|---|---|
| committer | Billingsly Wetherfordshire <phowl.mouth@gmail.com> | 2013-12-23 11:52:11 -0600 |
| commit | b3057be2c9a2b354ad1244814a2cac3968cc4d65 (patch) | |
| tree | 199d6f234c1ff6c2bb05fa952bdf85f522788820 /lib/pure/endians.nim | |
| parent | c3b3339e779dfe19ed1891295a763aea47981131 (diff) | |
| download | Nim-b3057be2c9a2b354ad1244814a2cac3968cc4d65.tar.gz | |
Update endians.nim
adds swapEndian16 function
Diffstat (limited to 'lib/pure/endians.nim')
| -rw-r--r-- | lib/pure/endians.nim | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/pure/endians.nim b/lib/pure/endians.nim index 34270b320..73017464d 100644 --- a/lib/pure/endians.nim +++ b/lib/pure/endians.nim @@ -34,14 +34,26 @@ proc swapEndian32*(outp, inp: pointer) = 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) |