Use vsnprintf instead of the potentially dangerous sprintf to avoid

warnings. Using snprintf directly would be a little bit more tricky,
because once again Microsoft decided to avoid followind standards and
provide _snprintf instead. We could use this, too, but this would
require an additional autoconf check, which I'd like to avoid, if
possible.

Note: If VS *still* issues warnings, but this time about vsnprintf,
somebody should add some pragmas or whatever is needed to shut up that
warning, it would be silly.


git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@783 7f0cb862-5218-0410-a997-914c9d46530a

freeglut/freeglut/progs/demos/CallbackMaker/CallbackMaker.c

@@ -7,6 +7,7 @@
 #include <GL/freeglut.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 
 static int sequence_number = 0 ;
 
@@ -28,10 +29,23 @@ int mouse_button = -1, mouse_updown = -1, mouse_x = -1, mouse_y = -1, mouse_seq
 int mousewheel_number = -1, mousewheel_direction = -1, mousewheel_x = -1, mousewheel_y = -1, mousewheel_seq = -1 ;
 int motion_x = -1, motion_y = -1, motion_seq = -1 ;
 int passivemotion_x = -1, passivemotion_y = -1, passivemotion_seq = -1 ;
+
+static void
+bitmapPrintf (const char *fmt, ...)
+{
+    static char buf[256];
+    va_list args;
+
+    va_start(args, fmt);
+    (void) vsnprintf (buf, sizeof(buf), fmt, args);
+    va_end(args);
+    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)buf ) ;
+}
+
+
 static void 
 Display(void)
 {
-  char line[180] ;
   int window = glutGetWindow () ;
   glClear ( GL_COLOR_BUFFER_BIT );
 
@@ -49,68 +63,57 @@ Display(void)
 
   if ( reshape_called )
   {
-    sprintf ( line, "Reshape %d:  %d %d\n", reshape_seq, reshape_width, reshape_height );
+    bitmapPrintf ( "Reshape %d:  %d %d\n", reshape_seq, reshape_width, reshape_height );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( key_called )
   {
-    sprintf ( line, "Key %d:  %d(%c) %d %d\n", key_seq, key_key, key_key, key_x, key_y );
+    bitmapPrintf ( "Key %d:  %d(%c) %d %d\n", key_seq, key_key, key_key, key_x, key_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( special_called )
   {
-    sprintf ( line, "Special %d:  %d(%c) %d %d\n", special_seq, special_key, special_key, special_x, special_y );
+    bitmapPrintf ( "Special %d:  %d(%c) %d %d\n", special_seq, special_key, special_key, special_x, special_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( visibility_called )
   {
-    sprintf ( line, "Visibility %d:  %d\n", visibility_seq, visibility_vis );
+    bitmapPrintf ( "Visibility %d:  %d\n", visibility_seq, visibility_vis );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( keyup_called )
   {
-    sprintf ( line, "Key Up %d:  %d(%c) %d %d\n", keyup_seq, keyup_key, keyup_key, keyup_x, keyup_y );
+    bitmapPrintf ( "Key Up %d:  %d(%c) %d %d\n", keyup_seq, keyup_key, keyup_key, keyup_x, keyup_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( specialup_called )
   {
-    sprintf ( line, "Special Up %d:  %d(%c) %d %d\n", specialup_seq, specialup_key, specialup_key, specialup_x, specialup_y );
+    bitmapPrintf ( "Special Up %d:  %d(%c) %d %d\n", specialup_seq, specialup_key, specialup_key, specialup_x, specialup_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( joystick_called )
   {
-    sprintf ( line, "Joystick %d:  %d %d %d %d\n", joystick_seq, joystick_a, joystick_b, joystick_c, joystick_d );
+    bitmapPrintf ( "Joystick %d:  %d %d %d %d\n", joystick_seq, joystick_a, joystick_b, joystick_c, joystick_d );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( mouse_called )
   {
-    sprintf ( line, "Mouse %d:  %d %d %d %d\n", mouse_seq, mouse_button, mouse_updown, mouse_x, mouse_y );
+    bitmapPrintf ( "Mouse %d:  %d %d %d %d\n", mouse_seq, mouse_button, mouse_updown, mouse_x, mouse_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( mousewheel_called )
   {
-    sprintf ( line, "Mouse Wheel %d:  %d %d %d %d\n", mousewheel_seq, mousewheel_number, mousewheel_direction, mousewheel_x, mousewheel_y );
+    bitmapPrintf ( "Mouse Wheel %d:  %d %d %d %d\n", mousewheel_seq, mousewheel_number, mousewheel_direction, mousewheel_x, mousewheel_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( motion_called )
   {
-    sprintf ( line, "Motion %d:  %d %d\n", motion_seq, motion_x, motion_y );
+    bitmapPrintf ( "Motion %d:  %d %d\n", motion_seq, motion_x, motion_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   if ( passivemotion_called )
   {
-    sprintf ( line, "Passive Motion %d:  %d %d\n", passivemotion_seq, passivemotion_x, passivemotion_y );
+    bitmapPrintf ( "Passive Motion %d:  %d %d\n", passivemotion_seq, passivemotion_x, passivemotion_y );
-    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)line );
   }
 
   glMatrixMode ( GL_PROJECTION );

freeglut/freeglut/progs/demos/Lorenz/lorenz.c

@@ -29,6 +29,7 @@
 /* Include Files */
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <string.h>
 #include <math.h>
 #include <GL/freeglut.h>
@@ -242,10 +243,19 @@ void draw_curve ( int index, double position [ NUM_POINTS ][3] )
   glEnd () ;
 }
 
+void bitmapPrintf (const char *fmt, ...)
+{
+    static char buf[256];
+    va_list args;
+
+    va_start(args, fmt);
+    (void) vsnprintf (buf, sizeof(buf), fmt, args);
+    va_end(args);
+    glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)buf ) ;
+}
+
 void display_cb ( void )
 {
-  char string [ 80 ] ;
-
   glClear ( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ) ;
 
   glColor3d ( 1.0, 1.0, 1.0 ) ;  /* White */
@@ -267,9 +277,8 @@ void display_cb ( void )
 
   /* Print the distance between the two points */
   glColor3d ( 1.0, 1.0, 1.0 ) ;  /* White */
-  sprintf ( string, "Distance: %10.6f", distance ) ;
   glRasterPos2i ( 1, 1 ) ;
-  glutBitmapString ( GLUT_BITMAP_HELVETICA_12, (unsigned char*)string ) ;
+  bitmapPrintf ( "Distance: %10.6f", distance ) ;
 
   glutSwapBuffers();
 }

freeglut/freeglut/progs/demos/shapes/shapes.c

@@ -180,15 +180,6 @@ static const entry table [] =
 
     Limitation: Cannot address pixels.
     Limitation: Renders in screen coords, not model coords.
-
-    \note Uses a fixed, 256-byte array for holding strings.
-          The best way around this would be to use vasprintf(),
-          but that is not available on WIN32, I believe.
-          Another alternative would be to write our own formatter
-          from scratch and emit the characters one at a time to
-          the GLUT bitmap single-character drawing routine.
-          We could also use vsnprintf(), but I'm not sure if
-          that is standard...
 */
 static void shapesPrintf (int row, int col, const char *fmt, ...)
 {
@@ -198,7 +189,7 @@ static void shapesPrintf (int row, int col, const char *fmt, ...)
     va_list args;
 
     va_start(args, fmt);
-    (void) vsprintf (buf, fmt, args);
+    (void) vsnprintf (buf, sizeof(buf), fmt, args);
     va_end(args);
 
     glGetIntegerv(GL_VIEWPORT,viewport);