Prefer snprintf to sprintf in image.c

* src/image.c (image_background, image_build_heuristic_mask)
(png_load_body): Prefer snprintf to sprintf.

1 files changed, 8 insertions, 7 deletions

diff --git a/src/image.c b/src/image.c
index 7ab6289bb2a..2b898e12805 100644
--- a/src/image.c
+++ b/src/image.c
@@ -1995,10 +1995,10 @@ image_background (struct image *img, struct frame *f, Emacs_Pix_Context pimg)
 #ifdef USE_CAIRO
       {
         char color_name[30];
-        sprintf (color_name, "#%04x%04x%04x",
-                 (unsigned int) RED16_FROM_ULONG (bg),
-                 (unsigned int) GREEN16_FROM_ULONG (bg),
-                 (unsigned int) BLUE16_FROM_ULONG (bg));
+        snprintf (color_name, sizeof color_name, "#%04x%04x%04x",
+                  (unsigned int) RED16_FROM_ULONG (bg),
+                  (unsigned int) GREEN16_FROM_ULONG (bg),
+                  (unsigned int) BLUE16_FROM_ULONG (bg));
         bg = image_alloc_image_color (f, img, build_string (color_name), 0);
       }
 #endif
@@ -7386,8 +7386,8 @@ image_build_heuristic_mask (struct frame *f, struct image *img,
         {
 #ifndef USE_CAIRO
           char color_name[30];
-          sprintf (color_name, "#%04x%04x%04x",
-                   rgb[0] + 0u, rgb[1] + 0u, rgb[2] + 0u);
+          snprintf (color_name, sizeof color_name, "#%04x%04x%04x",
+                    rgb[0] + 0u, rgb[1] + 0u, rgb[2] + 0u);
           bg = (
 #ifdef HAVE_NTGUI
                 0x00ffffff & /* Filter out palette info.  */
@@ -8537,7 +8537,8 @@ png_load_body (struct frame *f, struct image *img, struct png_load_context *c)
           img->background = lookup_rgb_color (f, bg->red, bg->green, bg->blue);
 #else  /* USE_CAIRO */
           char color_name[30];
-          sprintf (color_name, "#%04x%04x%04x", bg->red, bg->green, bg->blue);
+          snprintf (color_name, sizeof color_name, "#%04x%04x%04x",
+                    bg->red, bg->green, bg->blue);
           img->background
             = image_alloc_image_color (f, img, build_string (color_name), 0);
 #endif /* USE_CAIRO */