Simplify str_toupper() in "utils.c".

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/calcurse.h

@@ -873,7 +873,7 @@ char        *new_tempfile (const char *, int);
 void         erase_note (char **, enum eraseflg);
 int          parse_date (char *, enum datefmt, int *, int *, int *,
                          struct date *);
-char        *str_toupper (char *);
+void         str_toupper (char *);
 void         file_close (FILE *, const char *);
 void         psleep (unsigned);
 

src/io.c

@@ -1916,32 +1916,31 @@ ical_chk_header (FILE *fd, unsigned *lineno)
 
   (void)fgets (buf, BUFSIZ, fd);
   (*lineno)++;
-  if (buf == NULL
-      || strncmp (str_toupper (buf), icalheader.str, icalheader.len) != 0)
-    {
-      return HEADER_MALFORMED;
-    }
-  else
-    {
-      const int AWAITED = 1;
-      float version = HEADER_MALFORMED;
-      int read;
 
-      do
+  if (buf == NULL) return HEADER_MALFORMED;
+
+  str_toupper (buf);
+  if (strncmp (buf, icalheader.str, icalheader.len) != 0)
+    return HEADER_MALFORMED;
+
+  const int AWAITED = 1;
+  float version = HEADER_MALFORMED;
+  int read;
+
+  do
+    {
+      if (fgets (buf, BUFSIZ, fd) == NULL)
         {
-          if (fgets (buf, BUFSIZ, fd) == NULL)
+          return HEADER_MALFORMED;
-            {
+        }
-              return HEADER_MALFORMED;
+      else
-            }
+        {
-          else
+          (*lineno)++;
-            {
+          read = sscanf (buf, "VERSION:%f", &version);
-              (*lineno)++;
-              read = sscanf (buf, "VERSION:%f", &version);
-            }
         }
-      while (read != AWAITED);
-      return version;
     }
+  while (read != AWAITED);
+  return version;
 }
 
 /*

src/utils.c

@@ -957,14 +957,11 @@ parse_date (char *date_string, enum datefmt datefmt, int *year, int *month,
   return 1;
 }
 
-char *
+void
 str_toupper (char *s)
 {
-  int len;
+  if (!s) return;
-
+  for (; *s; s++) *s = toupper (*s);
-  for (len = 0; s && s[len]; len++)
-    s[len] = toupper (s[len]);
-  return s;
 }
 
 void