Fix push parsing memory leak reported by Brandon Lucia at

[bison.git] / src / location.h

diff --git a/src/location.h b/src/location.h
index 5a2d64a30170ab9dc9f7c7d8baf85d53af006928..0b4f715a2cca17585443ddabe444034c406128d7 100644 (file)
--- a/src/location.h
+++ b/src/location.h
@@ -1,5 +1,5 @@
 /* Locations for Bison
-   Copyright (C) 2002  Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -15,61 +15,73 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */
 
 #ifndef LOCATION_H_
 # define LOCATION_H_
-# include "quotearg.h"
 
-typedef struct location_s
+# include "uniqstr.h"
+
+/* A boundary between two characters.  */
+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.  */
+  int line;
+
+  /* The (origin-1) column just after the boundary.  This is neither a
+     byte count, nor a character count; it is a column count.
+     If this is INT_MAX, the column number has overflowed.  */
+  int column;
+
+} boundary;
+
+/* Set the position of \a a. */
+static inline void
+boundary_set (boundary *b, const char *f, int l, int c)
+{
+  b->file = f;
+  b->line = l;
+  b->column = c;
+}
+
+/* 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 location, that is, a region of source code.  */
+typedef struct
 {
-  const char *file;
-  int first_line;
-  int first_column;
-  int last_line;
-  int last_column;
-}  location_t;
-#define YYLTYPE location_t
-
-/* Initialize LOC. */
-# define LOCATION_RESET(Loc)                   \
-do {                                           \
-  (Loc).file = NULL;                           \
-  (Loc).first_column = (Loc).first_line = 1;   \
-  (Loc).last_column =  (Loc).last_line = 1;    \
-} while (0)
-
-
-/* Restart: move the first cursor to the last position. */
-# define LOCATION_STEP(Loc)                    \
-do {                                           \
-  (Loc).first_column = (Loc).last_column;      \
-  (Loc).first_line = (Loc).last_line;          \
-} while (0)
-
-
-/* Output LOC on the stream OUT.
-   Warning: it uses quotearg's slot 3.  */
-# define LOCATION_PRINT(Out, Loc)                                      \
-do {                                                                   \
-  fprintf (stderr, "%s:", quotearg_n_style (3, escape_quoting_style,   \
-                                           (Loc).file));               \
-  if ((Loc).first_line)                                                        \
-    {                                                                  \
-      if ((Loc).first_line != (Loc).last_line)                         \
-       fprintf (Out, "%d.%d-%d.%d",                                    \
-                (Loc).first_line, (Loc).first_column,                  \
-                (Loc).last_line, (Loc).last_column - 1);               \
-      else if ((Loc).first_column < (Loc).last_column - 1)             \
-       fprintf (Out, "%d.%d-%d", (Loc).first_line,                     \
-                (Loc).first_column, (Loc).last_column - 1);            \
-      else                                                             \
-       fprintf (Out, "%d.%d", (Loc).first_line, (Loc).first_column);   \
-  }                                                                    \
-} while (0)
-
-
-extern location_t empty_location;
-
-#endif /* !LOCATION_H_ */
+  /* Boundary just before the location starts.  */
+  boundary start;
+
+  /* Boundary just after the location ends.  */
+  boundary end;
+
+} location;
+
+#define YYLTYPE location
+
+#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);
+
+void location_print (FILE *out, location loc);
+
+/* 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_ */