(add_param): Fix bug where NUL was mishandled.

[bison.git] / src / location.h

diff --git a/src/location.h b/src/location.h
index 0c5ef686470a885ffb87cff3d924da7bdeec75bb..3bdf93c376b5ca5a0c6bf4bb7babbf83e6fecea7 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 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -21,45 +21,47 @@
 #ifndef LOCATION_H_
 # define LOCATION_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.  */
+  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.  */
+  int column;
+
+} boundary;
+
+/* 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
 {
-  int first_line;
-  int first_column;
-  int last_line;
-  int last_column;
-}  location_t;
-#define YYLTYPE location_t
-
-/* Initialize LOC. */
-# define LOCATION_RESET(Loc)                  \
-  (Loc).first_column = (Loc).first_line = 1;  \
-  (Loc).last_column =  (Loc).last_line = 1;
-
-/* Advance of NUM columns. */
-# define LOCATION_COLUMNS(Loc, Num)           \
-  (Loc).last_column += Num;
-
-/* Advance of NUM lines. */
-# define LOCATION_LINES(Loc, Num)             \
-  (Loc).last_column = 1;                      \
-  (Loc).last_line += Num;
-
-/* Restart: move the first cursor to the last position. */
-# define LOCATION_STEP(Loc)                   \
-  (Loc).first_column = (Loc).last_column;     \
-  (Loc).first_line = (Loc).last_line;
-
-/* Output LOC on the stream OUT. */
-# define LOCATION_PRINT(Out, Loc)                               \
-  fprintf (stderr, "%s:", infile);                             \
-  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)
-
-#endif /* !LOCATION_H_ */
+  /* Boundary just before the location starts.  */
+  boundary start;
+
+  /* Boundary just after the location ends.  */
+  boundary end;
+
+} location;
+
+#define YYLTYPE location
+
+extern location const empty_location;
+
+void location_print (FILE *, location);
+
+#endif /* ! defined LOCATION_H_ */