jyapayne/Nim
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #5012 from yglukhov/fileseekpos

Browse source 
Added FileSeekPos
This commit is contained in:
Dominik Picheta 2016-12-08 18:00:52 +01:00 • committed by GitHub
commit a83ad87d09
2 changed files with 11 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

10
lib/system.nim
View file

@ -2595,6 +2595,14 @@ else:
if x < 0: -x else: x
{.pop.}
type
FileSeekPos* = enum ## Position relative to which seek should happen
# The values are ordered so that they match with stdio
# SEEK_SET, SEEK_CUR and SEEK_END respectively.
fspSet ## Seek to absolute value
fspCur ## Seek relative to current position
fspEnd ## Seek relative to end
when not defined(JS): #and not defined(nimscript):
{.push stack_trace: off, profiler:off.}
@ -2858,7 +2866,7 @@ when not defined(JS): #and not defined(nimscript):
## file `f`. Returns the number of actual written bytes, which may be less
## than `len` in case of an error.
proc setFilePos*(f: File, pos: int64) {.benign.}
proc setFilePos*(f: File, pos: int64, relativeTo: FileSeekPos = fspSet) {.benign.}
## sets the position of the file pointer that is used for read/write
## operations. The file's first byte has the index zero.

4
lib/system/sysio.nim
View file

@ -336,8 +336,8 @@ proc open(f: var File, filehandle: FileHandle, mode: FileMode): bool =
f = c_fdopen(filehandle, FormatOpen[mode])
result = f != nil
proc setFilePos(f: File, pos: int64) =
if c_fseek(f, clong(pos), 0) != 0:
proc setFilePos(f: File, pos: int64, relativeTo: FileSeekPos = fspSet) =
if c_fseek(f, clong(pos), cint(relativeTo)) != 0:
raiseEIO("cannot set file position")
proc getFilePos(f: File): int64 =