prepare for the release of rrdtool-1.4.2

[rrdtool.git] / src / pngsize.c

diff --git a/src/pngsize.c b/src/pngsize.c
index 012d5cd..b8dc35b 100644 (file)
--- a/src/pngsize.c
+++ b/src/pngsize.c
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * RRDtool 1.2.13  Copyright by Tobi Oetiker, 1997-2006
+ * RRDtool 1.4.2  Copyright by Tobi Oetiker, 1997-2009
  *****************************************************************************
  * pngsize.c  determine the size of a PNG image
  *****************************************************************************/
@@ -7,44 +7,50 @@
 #include <png.h>
 #include "rrd_tool.h"
 
-int
-PngSize(FILE *fd, long *width, long *height)
+int PngSize(
+    FILE * fd,
+    long *width,
+    long *height)
 {
-  png_structp png_read_ptr = 
-    png_create_read_struct(PNG_LIBPNG_VER_STRING, 
-                          (png_voidp)NULL,
-                               /* we would need to point to error handlers
-                                  here to do it properly */
-                          (png_error_ptr)NULL, (png_error_ptr)NULL);
-    
-  png_infop info_ptr = png_create_info_struct(png_read_ptr);
-
-  (*width)=0;
-  (*height)=0;
+    png_structp png_read_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,
+                                                      (png_voidp) NULL,
+                                                      /* we would need to point to error handlers
+                                                         here to do it properly */
+                                                      (png_error_ptr) NULL,
+                                                      (png_error_ptr) NULL);
+
+    png_infop info_ptr = png_create_info_struct(png_read_ptr);
+
+    (*width) = 0;
+    (*height) = 0;
 
 /* this is to make compile on aix work since they seem to define jmpbuf
    to be _jmpbuf which breaks compilation */
 
+#ifndef png_jmpbuf
+#ifdef PNG_SETJMP_SUPPORTED
+#  define png_jmpbuf(png_ptr)   ((png_ptr)->PNG_jmpbuf)
+#else
 #ifdef jmpbuf
 #undef jmpbuf
 #endif
+#  define png_jmpbuf(png_ptr)   ((png_ptr)->jmpbuf)
+#endif
+#endif
 
-  if (setjmp(png_read_ptr->jmpbuf)){
-    png_destroy_read_struct(&png_read_ptr, &info_ptr, (png_infopp)NULL);
-    return 0;
-  }
-
-  png_init_io(png_read_ptr,fd);
-  png_read_info(png_read_ptr, info_ptr);
-  (*width)=png_get_image_width(png_read_ptr, info_ptr);
-  (*height)=png_get_image_height(png_read_ptr, info_ptr);
-  
-  png_destroy_read_struct(&png_read_ptr, &info_ptr, NULL);
-  if (*width >0 && *height >0) 
-    return 1;
-  else
-    return 0;
+    if (setjmp(png_jmpbuf(png_read_ptr))) {
+        png_destroy_read_struct(&png_read_ptr, &info_ptr, (png_infopp) NULL);
+        return 0;
+    }
+
+    png_init_io(png_read_ptr, fd);
+    png_read_info(png_read_ptr, info_ptr);
+    (*width) = png_get_image_width(png_read_ptr, info_ptr);
+    (*height) = png_get_image_height(png_read_ptr, info_ptr);
+
+    png_destroy_read_struct(&png_read_ptr, &info_ptr, NULL);
+    if (*width > 0 && *height > 0)
+        return 1;
+    else
+        return 0;
 }
-
-
-