Quiet gcc-4.8 warnings about unused results

The warning -Wunused-result is on by default, so we'd like to deal
with those before adding routine testing to Jenkins with gcc-4.8.

Change-Id: I905d43e7fa50229b38d2d3d9e642372790f73899

diff --git a/src/programs/view/fgrid.cpp b/src/programs/view/fgrid.cpp
index 5b70a1f5f305784e60de5aed60b008ba4dd18feb..19a7868da932e51536328560c4ba9ac9d67de6d5 100644 (file)
--- a/src/programs/view/fgrid.cpp
+++ b/src/programs/view/fgrid.cpp
@@ -102,9 +102,10 @@ void ReadDlgError(const char *infile, eDLGERR err, const char *s,
 static void ReadAccOpen(const char *infile, FILE *in)
 {
     char buf[STRLEN];
+    int  result;
 
-    fscanf(in, "%4s", buf);
-    if (strcmp(buf, "{") != 0)
+    result = fscanf(in, "%4s", buf);
+    if ((1 != result) || strcmp(buf, "{") != 0)
     {
         ReadDlgErr(infile, eACCOEXP, buf);
     }
@@ -113,9 +114,10 @@ static void ReadAccOpen(const char *infile, FILE *in)
 static void ReadAccClose(const char *infile, FILE *in)
 {
     char buf[STRLEN];
+    int  result;
 
-    fscanf(in, "%4s", buf);
-    if (strcmp(buf, "}") != 0)
+    result = fscanf(in, "%4s", buf);
+    if ((1 != result) || strcmp(buf, "}") != 0)
     {
         ReadDlgErr(infile, eACCCEXP, buf);
     }
@@ -368,15 +370,16 @@ t_fgrid *FGridFromFile(const char *infile)
 {
     FILE      *in;
     char       buf[STRLEN];
+    int        result;
 
     t_fgrid   *fgrid;
     t_fgroup  *fgroup;
     t_fsimple *fsimple;
     int        gridx, gridy;
 
-    in = libopen(infile);
-    fscanf(in, "%6s", buf);
-    if (strcmp(buf, "grid") != 0)
+    in     = libopen(infile);
+    result = fscanf(in, "%6s", buf);
+    if ((1 != result) || strcmp(buf, "grid") != 0)
     {
         ReadDlgErr(infile, eGRIDEXP, buf);
     }
@@ -388,8 +391,8 @@ t_fgrid *FGridFromFile(const char *infile)
     fgrid->w = gridx;
     fgrid->h = gridy;
     ReadAccOpen(infile, in);
-    fscanf(in, "%15s", buf);
-    while (bNotAccClose(buf))
+    result = fscanf(in, "%15s", buf);
+    while ((1 == result) && bNotAccClose(buf))
     {
         if (strcmp(buf, "group") == 0)
         {
@@ -409,11 +412,11 @@ t_fgrid *FGridFromFile(const char *infile)
                 ReadDlgErr(infile, eTOOHIGH, buf);
             }
             ReadAccOpen(infile, in);
-            fscanf(in, "%15s", buf);
-            while (bNotAccClose(buf))
+            result = fscanf(in, "%15s", buf);
+            while ((1 == result) && bNotAccClose(buf))
             {
                 AddFGroupFItem(fgroup, ScanFItem(infile, in, buf));
-                fscanf(in, "%15s", buf);
+                result = fscanf(in, "%15s", buf);
             }
         }
         else if (strcmp(buf, "simple") == 0)
@@ -432,13 +435,26 @@ t_fgrid *FGridFromFile(const char *infile)
                 ReadDlgErr(infile, eTOOHIGH, "simple");
             }
             ReadAccOpen(infile, in);
-            fscanf(in, "%15s", buf);
-            fsimple->fitem = ScanFItem(infile, in, buf);
-            ReadAccClose(infile, in);
+            result = fscanf(in, "%15s", buf);
+            if (1 == result)
+            {
+                fsimple->fitem = ScanFItem(infile, in, buf);
+                ReadAccClose(infile, in);
+            }
+        }
+        if (1 == result)
+        {
+            result = fscanf(in, "%15s", buf);
         }
-        fscanf(in, "%15s", buf);
     }
     gmx_ffclose(in);
+    /* Since we always read one variable at a time the result from
+     * fscanf should always be 1.
+     */
+    if (1 != result)
+    {
+        ReadDlgErr(infile, eNOVALS, "fgrid");
+    }
 
     return fgrid;
 }