[GRASSLIST:6816] struggling with v.in.ascii

[Robert Nuske]

Hi,

since I am still struggling with v.in.ascii, I had a closer look at the
code and made some weird observations (meaning: I don't understand what I
see).

to set the scene:
I am using GRASS on a debian/testing system, but grass compiled from source.
s.in.ascii in grass54 is reading the file (see below) without problems.
v.in.ascii in grass61cvs from today is checking the file and comes up with
the right conclusions about the number of columns and the respective data
types (see below), but is not writing anything to the resulting vector
dataset (it contains only a database link).


Looking at the code:
The function points_analyse (called in in.c, line 195) goes through the
input file and  should write, amongst other things, the lines containing
actual data to the file tmpascii.

But, I found tmpascii to be empty after this function call (printed ascii
and tmpascii to stdout => ascii: copy of input file and tmpascii: nothing)

That's why the function points_to_bin (called in in.c, line 385) cannot
fetch any data.

The while-loop in (points.c, line 172) is never entered, because the file
G_getl2 is supposed to read is empty.


What I don't understand is that writing of a dataline to tmpascii in the
function points_analyse (points.c, line 90) seems to be successful. The
return value of fprintf states 29 chars were written. When I write the
same to stdout it looks okay, as well. What happens to tmpascii ?


v.in.ascii works just perfect, if I put "ascii" instead of "tmpascii" in
the call of the function points_to_bin (in.c line 385).


Clues are more than welcome.

Robert



=======================================================================

> more points.txt
248445.02 700247.69 39.31 66
248445.02 700247.88 39.36 56
248445.02 700248.06 39.22 50
248445.02 700248.00 39.13 50
248445.02 700248.00 39.12 50


GRASS 6.1.cvs (aberfoyle61):~ > v.in.ascii in=points.txt format=point \
fs=' ' out=test1
Maximum input row length: 29
Maximum number of columns: 4
Minimum number of columns: 4
column: 1  type: double
column: 2  type: double
column: 3  type: double
column: 4  type: integer
Building topology ...
0 primitives registered
0 areas built
0 isles built
Attaching islands:
Attaching centroids: Topology was built.
Number of nodes     :   0
Number of primitives:   0
Number of points    :   0
Number of lines     :   0
Number of boundaries:   0
Number of centroids :   0
Number of areas     :   0
Number of isles     :   0


GRASS 6.1.cvs (aberfoyle61):~ > v.in in=points.txt format=point \
fs=' ' out=test2
Maximum input row length: 29
Maximum number of columns: 4
Minimum number of columns: 4
column: 1  type: double
column: 2  type: double
column: 3  type: double
column: 4  type: integer
Building topology ...
5 primitives registered
Building areas:  100%
0 areas built
0 isles built
Attaching islands:
Attaching centroids:  100%
Topology was built.
Number of nodes     :   4
Number of primitives:   5
Number of points    :   5
Number of lines     :   0
Number of boundaries:   0
Number of centroids :   0
Number of areas     :   0
Number of isles     :   0