2000-06-13 H.J. Lu <hjl@gnu.org>

[deliverable/binutils-gdb.git] / gas / macro.h

diff --git a/gas/macro.h b/gas/macro.h
index cdeea4ad3b475076194090b73dde36766e0248e0..9c61acd89a97bc4ca306228ce5e536dbaa1cc081 100644 (file)
--- a/gas/macro.h
+++ b/gas/macro.h
@@ -28,6 +28,42 @@
 #include "ansidecl.h"
 #include "sb.h"
 
+/* Structures used to store macros. 
+
+   Each macro knows its name and included text.  It gets built with a
+   list of formal arguments, and also keeps a hash table which points
+   into the list to speed up formal search.  Each formal knows its
+   name and its default value.  Each time the macro is expanded, the
+   formals get the actual values attatched to them. */
+
+/* describe the formal arguments to a macro */
+
+typedef struct formal_struct
+  {
+    struct formal_struct *next;        /* next formal in list */
+    sb name;                   /* name of the formal */
+    sb def;                    /* the default value */
+    sb actual;                 /* the actual argument (changed on each expansion) */
+    int index;                 /* the index of the formal 0..formal_count-1 */
+  }
+formal_entry;
+
+/* Other values found in the index field of a formal_entry.  */
+#define QUAL_INDEX (-1)
+#define NARG_INDEX (-2)
+#define LOCAL_INDEX (-3)
+
+/* describe the macro. */
+
+typedef struct macro_struct
+  {
+    sb sub;                    /* substitution text. */
+    int formal_count;          /* number of formal args. */
+    formal_entry *formals;     /* pointer to list of formal_structs */
+    struct hash_control *formal_hash; /* hash table of formals. */
+  }
+macro_entry;
+
 /* Whether any macros have been defined.  */
 
 extern int macro_defined;
@@ -45,7 +81,8 @@ extern void macro_mri_mode PARAMS ((int));
 extern const char *define_macro
   PARAMS ((int idx, sb *in, sb *label, int (*get_line) PARAMS ((sb *)),
           const char **namep));
-extern int check_macro PARAMS ((const char *, sb *, int, const char **));
+extern int check_macro PARAMS ((const char *, sb *, int, const char **, 
+                                macro_entry **));
 extern void delete_macro PARAMS ((const char *));
 extern const char *expand_irp
   PARAMS ((int, int, sb *, sb *, int (*) PARAMS ((sb *)), int));