[GRASS-dev] Re: [GRASS GIS] #1006: r.terraflow fails to create temp file on Windows when launched from wxgui

[GRASS GIS]

#1006: r.terraflow fails to create temp file on Windows when launched from wxgui
------------------------------+---------------------------------------------
  Reporter:  marisn           |       Owner:  grass-dev at lists.osgeo.org 
      Type:  defect           |      Status:  new                       
  Priority:  major            |   Milestone:  6.4.0                     
 Component:  Raster           |     Version:  svn-releasebranch64       
Resolution:                   |    Keywords:  wxgui, wingrass, terraflow
  Platform:  MSWindows Vista  |         Cpu:  x86-32                    
------------------------------+---------------------------------------------
Comment (by hamish):

 are you using the elevation raster map from the NC dataset?

 Helmut wrote:
 {{{
 Reading data from <elevation> to stream
 <C:/Users/syringia/AppData/Local/Temp/STREAM_a01828>
 C:/Users/syringia/AppData/Local/Temp/STREAM_a01828: length =
 17179869184   sizeof(T)=1
 C:/Users/syringia/AppData/Local/Temp/STREAM_a01828: length =
 17179869184   sizeof(T)=1
 Assertion failed: nrows * ncols == str->stream_len(), file
 grass2str.h, line 146
 }}}


 so the value of the buf.st_size variable is filled with garbage.
 and sizeof(T) is different from what I get on linux.

 for me on 32bit linux I get this output for that line (spearfish's
 elevation.dem)

 {{{
 evelation.dem:
 rows:       466
 cols:       633
 ...
 MFD flow direction
 D8CUT=999999986991104.000000
 Memory size: 300.00M (314572800) bytes
 Memory manager registering memory in MM_WARN_ON_MEMORY_EXCEEDED mode.
 Reading data from <elevation.dem> to stream </var/tmp//STREAM_qylbyz>
  100%

 /var/tmp//STREAM_qylbyz: length = 1179912   sizeof(T)=4
 /var/tmp//STREAM_qylbyz: length = 1179912   sizeof(T)=4

 total elements=294978, nodata elements=2661
 largest temporary files:
 FILL: 15.75M (16518768) [294978 elements, 56B each]
 FLOW: 22.30M (23385360) [292317 elements, 80B each]
 Will need at least 44.60M (46770720) space available in /var/tmp/
 ------------------------------
 COMPUTING FLOW DIRECTIONS
 ...
 }}}


 is stat() on Windows the same as it is on UNIX?

 on my version of linux .st_size should be type off_t: "total size, in
 bytes", and stat() should return 0 on success and -1 on failure.

 is `%lld` the right printf() setting for off_t?


 I'm not sure how big <class T> should be, but probably bigger than 1
 byte.. ?



 Hamish

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/1006#comment:14>
GRASS GIS <http://grass.osgeo.org>