Problem with (x)medcon and locales

[Juergen Salk <juergen.salk@gmx.de>]

Hi,

I am currently writing a program which uses the (x)medcon library 
version 0.9.1 for reading and processing DICOM images. 

Now I observed unexpected behavior when it comes to 
localization. Here is some bare bone sample code
to demonstrate the problem. It takes the DICOM filename as
argument and prints out the x, y and z coordinates of the
(first) image.

--%<-------------- testit.c code ---------------->%--

/* filename: testit.c */

#include <stdio.h>
#include <locale.h>
#include "medcon.h"

int main(int argc, char *argv[])
{
	int error;
	double x, y, z;
	FILEINFO fi;

	setlocale (LC_ALL, "");

	MDC_INFO=MDC_NO;

	if (argc == 2 ) {
		/* open the file, initialize FILEINFO structure */
		if ((error = MdcOpenFile(&fi, argv[1])) != MDC_OK) return (error);
		/* read the file */
		if ((error = MdcReadFile(&fi,1)) != MDC_OK) return (error);

		x = fi.image[0].image_pos_pat[0];
		y = fi.image[0].image_pos_pat[1];
		z = fi.image[0].image_pos_pat[2];

		printf ("x: %f\n", x);
		printf ("y: %f\n", y);
		printf ("z: %f\n", z);
	}
	return 0;
}

--%<------------ Makefile to build testit -------->%--

  CC = gcc
  CCOPTS = -Wall -g
  CFLAGS = -DMDC_DEPEND_H $(CCOPTS)

  ### Give rootdir where MedCon was installed
  XMEDCONDIR = `xmedcon-config --prefix`

  XMEDCONLIB = -lmdc

  INCS = `xmedcon-config --cflags`
  LIBS = `xmedcon-config --libs`

  testit: testit.c
          $(CC) $(CFLAGS) $(INCS) -o testit testit.c $(LIBS)

--%<---------------------------------------------->%--

Here is what happens on my system (Woody). Notice the
differences in y and z for different locale settings.

jsa@oest181:/home/jsa/temp> locale
LANG=POSIX
LC_CTYPE=de_DE
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=
jsa@oest181:/home/jsa/temp> ./testit image1.dcm
x: -250.000000
y: -250.000000
z: -12.500000
jsa@oest181:/home/jsa/temp> export LC_ALL=de_DE
jsa@oest181:/home/jsa/temp> locale
LANG=POSIX
LC_CTYPE="de_DE"
LC_NUMERIC="de_DE"
LC_TIME="de_DE"
LC_COLLATE="de_DE"
LC_MONETARY="de_DE"
LC_MESSAGES="de_DE"
LC_PAPER="de_DE"
LC_NAME="de_DE"
LC_ADDRESS="de_DE"
LC_TELEPHONE="de_DE"
LC_MEASUREMENT="de_DE"
LC_IDENTIFICATION="de_DE"
LC_ALL=de_DE
jsa@oest181:/home/jsa/temp> ./testit image1.dcm
x: -250,000000
y: 0,000000
z: 0,000000


Is this a bug in (x)medcon or am I missing something?

Thanks in advance.

Regards - Juergen

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