From 9e86fc903eed2e7a19e6b6cf3e84d1387a1a0a6f Mon Sep 17 00:00:00 2001
From: Andrew Jeffery <andrew@aj.id.au>
Date: Sun, 22 Oct 2017 08:23:58 +1030
Subject: [PATCH] genann: Fix unused-result warnings for fscanf()

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
---
 genann.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/genann.c b/genann.c
index 9becd71..4571471 100644
--- a/genann.c
+++ b/genann.c
@@ -30,6 +30,7 @@
 #include <math.h>
 #include <assert.h>
 #include <stdio.h>
+#include <errno.h>
 
 #define LOOKUP_SIZE 4096
 
@@ -122,13 +123,27 @@ genann *genann_init(int inputs, int hidden_layers, int hidden, int outputs) {
 
 genann *genann_read(FILE *in) {
     int inputs, hidden_layers, hidden, outputs;
-    fscanf(in, "%d %d %d %d", &inputs, &hidden_layers, &hidden, &outputs);
+    int rc;
+
+    errno = 0;
+    rc = fscanf(in, "%d %d %d %d", &inputs, &hidden_layers, &hidden, &outputs);
+    if (rc < 4 || errno != 0) {
+        perror("fscanf");
+        return NULL;
+    }
 
     genann *ann = genann_init(inputs, hidden_layers, hidden, outputs);
 
     int i;
     for (i = 0; i < ann->total_weights; ++i) {
-        fscanf(in, " %le", ann->weight + i);
+        errno = 0;
+        rc = fscanf(in, " %le", ann->weight + i);
+        if (rc < 1 || errno != 0) {
+            perror("fscanf");
+            genann_free(ann);
+
+            return NULL;
+        }
     }
 
     return ann;