c++: fix several issues with locations

[bison.git] / src / location.h

diff --git a/src/location.h b/src/location.h
index efd256dd9529b40f10c15d2479073f34a8378136..8f1c5ae1df2ee40839d6480ec8946b77b0ea4a07 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, 2004-2013 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.
@@ -51,13 +55,26 @@ 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)
 {
   return (a.column == b.column
-         && a.line == b.line
-         && UNIQSTR_EQ (a.file, b.file));
+          && a.line == b.line
+          && UNIQSTR_EQ (a.file, b.file));
 }
 
 /* A location, that is, a region of source code.  */
@@ -71,19 +88,40 @@ typedef struct
 
 } location;
 
-#define YYLTYPE location
+# define GRAM_LTYPE location
 
-#define EMPTY_LOCATION_INIT {{NULL, 0, 0}, {NULL, 0, 0}}
+# define EMPTY_LOCATION_INIT {{NULL, 0, 0}, {NULL, 0, 0}}
 extern location const empty_location;
 
 /* Set *LOC and adjust scanner cursor to account for token TOKEN of
    size SIZE.  */
 void location_compute (location *loc,
-                      boundary *cur, char const *token, size_t size);
+                       boundary *cur, char const *token, size_t size);
+
+/* Print location to file.
+   Return number of actually printed characters.
+   Warning: uses quotearg's slot 3. */
+unsigned location_print (location loc, FILE *out);
+
+/* Free any allocated ressources and close any open file handles that are
+   left-over by the usage of location_caret.  */
+void cleanup_caret (void);
 
-void location_print (FILE *out, location loc);
+/* Output to OUT the line and caret corresponding to location LOC.  */
+void location_caret (location loc, FILE *out);
+
+/* 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.  */
+/* LOC_STR must be formatted as 'file:line.column', it will be modified.  */
 void boundary_set_from_string (boundary *bound, char *loc_str);
 
 #endif /* ! defined LOCATION_H_ */