Simplify range-checking functions for subopt parsing.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@30165 b3059339-0415-0410-9bf9-f77b7e298cf2

libao2/ao_alsa.c

@@ -265,9 +265,7 @@ static void print_help (void)
 
 static int str_maxlen(void *strp) {
   strarg_t *str = strp;
-  if (str->len > ALSA_DEVICE_SIZE)
-    return 0;
-  return 1;
+  return str->len <= ALSA_DEVICE_SIZE;
 }
 
 static int try_open_device(const char *device, int open_mode, int try_ac3)

libvo/vo_jpeg.c

@@ -333,9 +333,7 @@ static void check_events(void)
 static int int_zero_hundred(void *valp)
 {
     int *val = valp;
-    if ( (*val >=0) && (*val<=100) )
-        return 1;
-    return 0;
+    return *val >= 0 && *val <= 100;
 }
 
 static int preinit(const char *arg)

libvo/vo_png.c

@@ -286,9 +286,7 @@ static void check_events(void){}
 static int int_zero_to_nine(void *value)
 {
     int *sh = value;
-    if ( (*sh < 0) || (*sh > 9) )
-        return 0;
-    return 1;
+    return *sh >= 0 && *sh <= 9;
 }
 
 static const opt_t subopts[] = {

subopt-helper.c

@@ -303,17 +303,13 @@ static char const * parse_str( char const * str, strarg_t * const valp )
 int int_non_neg(void *iptr)
 {
   int *i = iptr;
-  if ( *i < 0 ) { return 0; }
-
-  return 1;
+  return *i >= 0;
 }
 /** \brief Test if i is positive. */
 int int_pos(void *iptr)
 {
   int *i = iptr;
-  if ( *i > 0 ) { return 1; }
-
-  return 0;
+  return *i > 0;
 }
 
 /*** little helpers */