Named symbol references.

[bison.git] / src / location.h

diff --git a/src/location.h b/src/location.h
index efd256dd9529b40f10c15d2479073f34a8378136..ec481649f1c3e684530f7b053cb3a99bc80c5a2e 100644 (file)
--- a/src/location.h
+++ b/src/location.h
@@ -1,5 +1,6 @@
 /* Locations for Bison
-   Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008, 2009 Free Software
+   Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -27,8 +28,11 @@ typedef struct
   /* The name of the file that contains the boundary.  */
   uniqstr file;
 
-  /* The (origin-1) line that contains the boundary.
-     If this is INT_MAX, the line number has overflowed.  */
+  /* If nonnegative, the (origin-1) line that contains the boundary.
+     If this is INT_MAX, the line number has overflowed.
+
+     Meaningless and not displayed if negative.
+  */
   int line;
 
   /* If nonnegative, the (origin-1) column just after the boundary.
@@ -51,6 +55,19 @@ boundary_set (boundary *b, const char *f, int l, int c)
   b->column = c;
 }
 
+/* Return -1, 0, 1, depending whether a is before, equal, or
+   after b.  */
+static inline int
+boundary_cmp (boundary a, boundary b)
+{
+  int res = strcmp (a.file, b.file);
+  if (!res)
+    res = a.line - b.line;
+  if (!res)
+    res = a.column - b.column;
+  return res;
+}
+
 /* Return nonzero if A and B are equal boundaries.  */
 static inline bool
 equal_boundaries (boundary a, boundary b)
@@ -83,6 +100,17 @@ void location_compute (location *loc,
 
 void location_print (FILE *out, location loc);
 
+/* Return -1, 0, 1, depending whether a is before, equal, or
+   after b.  */
+static inline int
+location_cmp (location a, location b)
+{
+  int res = boundary_cmp (a.start, b.start);
+  if (!res)
+    res = boundary_cmp (a.end, b.end);
+  return res;
+}
+
 /* LOC_STR must be formatted as `file:line.column', it will be modified.  */
 void boundary_set_from_string (boundary *bound, char *loc_str);