update code to allow you to run the fit outside of the src directory

To enable the fitter to run outside of the src directory, I created a new
function open_file() which works exactly like fopen() except that it searches
for the file in both the current working directory and the path specified by an
environment variable.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/quantum_efficiency.c b/src/quantum_efficiency.c
index a5571ab..200ad2c 100644
--- a/src/quantum_efficiency.c
+++ b/src/quantum_efficiency.c
@@ -3,6 +3,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include "misc.h"
+#include "util.h"
 
 static int initialized = 0;
 
@@ -17,7 +18,7 @@ static int init()
     double value;
     int n;
 
-    FILE *f = fopen("pmt_pcath_response.dat", "r");
+    FILE *f = open_file("pmt_pcath_response.dat", "r");
 
     if (!f) {
         fprintf(stderr, "failed to open pmt_pcath_response.dat: %s\n", strerror(errno));