From 8daec0a7b0b25fadb22cd3caadc25dad71d491a6 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Tue, 11 Aug 2020 15:33:50 +0200
Subject: image_read_image_data: Set zero values if file not found

---
 libcrystfel/src/image.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'libcrystfel')

diff --git a/libcrystfel/src/image.c b/libcrystfel/src/image.c
index d48e4f3b..c12a9889 100644
--- a/libcrystfel/src/image.c
+++ b/libcrystfel/src/image.c
@@ -35,6 +35,7 @@
 #include <assert.h>
 #include <math.h>
 #include <stdio.h>
+#include <sys/stat.h>
 
 #include "image.h"
 #include "utils.h"
@@ -551,11 +552,30 @@ int image_set_zero_mask(struct image *image,
 }
 
 
+static int file_exists(const char *filename)
+{
+	struct stat statbuf;
+	int r;
+
+	r = stat(filename, &statbuf);
+	if ( r != 0 ) {
+		return 0;
+	}
+
+	return 1;
+}
+
+
 int image_read_image_data(struct image *image,
                           const DataTemplate *dtempl,
                           const char *filename,
                           const char *event)
 {
+	if ( !file_exists(filename) ) {
+		ERROR("File not found: %s\n", filename);
+		return image_set_zero_data(image, dtempl);
+	}
+
 	if ( is_hdf5_file(filename) ) {
 		return image_hdf5_read(image, dtempl, filename, event);
 
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