(nullable_compute): Do not subtract from the returned value of malloc.

[bison.git] / src / location.c

diff --git a/src/location.c b/src/location.c
index dd32e5c1c20e51863af8470d31dd6c29f6a93a7f..9ba9378577561f653b7691596d2830bc2dd0312f 100644 (file)
--- a/src/location.c
+++ b/src/location.c
@@ -1,5 +1,5 @@
 /* Locations for Bison
-   Copyright (C) 2002  Free Software Foundation, Inc.
+   Copyright (C) 2002 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -18,7 +18,29 @@
    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include "system.h"
+
+#include <quotearg.h>
 
 #include "location.h"
 
-location_t empty_location = { 0, 0, 0, 0 };
+location const empty_location;
+
+/* Output to OUT the location LOC.
+   Warning: it uses quotearg's slot 3.  */
+void
+location_print (FILE *out, location loc)
+{
+  fprintf (out, "%s:%d.%d",
+          quotearg_n_style (3, escape_quoting_style, loc.start.file),
+          loc.start.line, loc.start.column);
+
+  if (loc.start.file != loc.end.file)
+    fprintf (out, "-%s:%d.%d",
+            quotearg_n_style (3, escape_quoting_style, loc.end.file),
+            loc.end.line, loc.end.column - 1);
+  else if (loc.start.line < loc.end.line)
+    fprintf (out, "-%d.%d", loc.end.line, loc.end.column - 1);
+  else if (loc.start.column < loc.end.column - 1)
+    fprintf (out, "-%d", loc.end.column - 1);
+}