X-Git-Url: https://git.artsoft.org/?a=blobdiff_plain;f=src%2Fmisc.c;h=2200460af29dcdc8783c0844220ddf85e47e5f7c;hb=20e58eb6573a45a41c25958e17e8d9c20f738edc;hp=fd85aeddac9e433635bff3586077c11e6fa5ad2f;hpb=41364660abbcb81a83f5018be3655352ecdf1ac9;p=rocksndiamonds.git

diff --git a/src/misc.c b/src/misc.c
index fd85aedd..2200460a 100644
--- a/src/misc.c
+++ b/src/misc.c
@@ -579,6 +579,84 @@ void *checked_calloc(unsigned long size)
   return ptr;
 }
 
+short getFile16BitInteger(FILE *file, int byte_order)
+{
+  if (byte_order == BYTE_ORDER_BIG_ENDIAN)
+    return ((fgetc(file) <<  8) |
+	    (fgetc(file) <<  0));
+  else		 /* BYTE_ORDER_LITTLE_ENDIAN */
+    return ((fgetc(file) <<  0) |
+	    (fgetc(file) <<  8));
+}
+
+void putFile16BitInteger(FILE *file, short value, int byte_order)
+{
+  if (byte_order == BYTE_ORDER_BIG_ENDIAN)
+  {
+    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);
+  }
+}
+
+int getFile32BitInteger(FILE *file, int byte_order)
+{
+  if (byte_order == BYTE_ORDER_BIG_ENDIAN)
+    return ((fgetc(file) << 24) |
+	    (fgetc(file) << 16) |
+	    (fgetc(file) <<  8) |
+	    (fgetc(file) <<  0));
+  else		 /* BYTE_ORDER_LITTLE_ENDIAN */
+    return ((fgetc(file) <<  0) |
+	    (fgetc(file) <<  8) |
+	    (fgetc(file) << 16) |
+	    (fgetc(file) << 24));
+}
+
+void putFile32BitInteger(FILE *file, int value, int byte_order)
+{
+  if (byte_order == BYTE_ORDER_BIG_ENDIAN)
+  {
+    fputc((value >> 24) & 0xff, file);
+    fputc((value >> 16) & 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 >> 16) & 0xff, file);
+    fputc((value >> 24) & 0xff, file);
+  }
+}
+
+void getFileChunk(FILE *file, char *chunk_buffer, int *chunk_length,
+		  int byte_order)
+{
+  const int chunk_identifier_length = 4;
+
+  /* read chunk identifier */
+  fgets(chunk_buffer, chunk_identifier_length + 1, file);
+
+  /* read chunk length */
+  *chunk_length = getFile32BitInteger(file, byte_order);
+}
+
+void putFileChunk(FILE *file, char *chunk_name, int chunk_length,
+		  int byte_order)
+{
+  /* write chunk identifier */
+  fputs(chunk_name, file);
+
+  /* write chunk length */
+  putFile32BitInteger(file, chunk_length, byte_order);
+}
+
 #define TRANSLATE_KEYSYM_TO_KEYNAME	0
 #define TRANSLATE_KEYSYM_TO_X11KEYNAME	1
 #define TRANSLATE_X11KEYNAME_TO_KEYSYM	2