X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Flibgame%2Fmisc.c;h=3b447821aafe06315a5286fd63386ebbd8e36234;hb=fd1c9b7a9b8d2fc25b2b4beffc224c39ee73bb35;hp=c7b8eea400aead264705c4ac9be1b3aa6e678532;hpb=bf1e4db1ffa9a313b8d1b68e55633ace682fef96;p=rocksndiamonds.git

diff --git a/src/libgame/misc.c b/src/libgame/misc.c
index c7b8eea4..3b447821 100644
--- a/src/libgame/misc.c
+++ b/src/libgame/misc.c
@@ -52,6 +52,7 @@ void printf_line(char *line_string, int line_length)
   fprintf_line(stdout, line_string, line_length);
 }
 
+
 /* int2str() returns a number converted to a string;
    the used memory is static, but will be overwritten by later calls,
    so if you want to save the result, copy it to a private string buffer;
@@ -82,6 +83,7 @@ char *int2str(int number, int size)
   }
 }
 
+
 /* something similar to "int2str()" above, but allocates its own memory
    and has a different interface; we cannot use "itoa()", because this
    seems to be already defined when cross-compiling to the win32 target */
@@ -103,6 +105,23 @@ char *i_to_a(unsigned int i)
 }
 
 
+/* calculate base-2 logarithm of argument (rounded down to integer;
+   this function returns the number of the highest bit set in argument) */
+
+int log_2(unsigned int x)
+{
+  int e = 0;
+
+  while ((1 << e) < x)
+  {
+    x -= (1 << e);	/* for rounding down (rounding up: remove this line) */
+    e++;
+  }
+
+  return e;
+}
+
+
 /* ------------------------------------------------------------------------- */
 /* counter functions                                                         */
 /* ------------------------------------------------------------------------- */
@@ -850,27 +869,27 @@ inline void swap_number_pairs(int *x1, int *y1, int *x2, int *y2)
   *y2 = help_y;
 }
 
-short getFile16BitInteger(FILE *file, int byte_order)
+int getFile16BitInteger(FILE *file, int byte_order)
 {
   if (byte_order == BYTE_ORDER_BIG_ENDIAN)
-    return ((fgetc(file) <<  8) |
-	    (fgetc(file) <<  0));
+    return ((fgetc(file) << 8) |
+	    (fgetc(file) << 0));
   else		 /* BYTE_ORDER_LITTLE_ENDIAN */
-    return ((fgetc(file) <<  0) |
-	    (fgetc(file) <<  8));
+    return ((fgetc(file) << 0) |
+	    (fgetc(file) << 8));
 }
 
-void putFile16BitInteger(FILE *file, short value, int byte_order)
+void putFile16BitInteger(FILE *file, int value, int byte_order)
 {
   if (byte_order == BYTE_ORDER_BIG_ENDIAN)
   {
-    fputc((value >>  8) & 0xff, file);
-    fputc((value >>  0) & 0xff, file);
+    fputc((value >> 8) & 0xff, file);
+    fputc((value >> 0) & 0xff, file);
   }
   else		 /* BYTE_ORDER_LITTLE_ENDIAN */
   {
-    fputc((value >>  0) & 0xff, file);
-    fputc((value >>  8) & 0xff, file);
+    fputc((value >> 0) & 0xff, file);
+    fputc((value >> 8) & 0xff, file);
   }
 }