Initial revision
diff --git a/Include/grammar.h b/Include/grammar.h
new file mode 100644
index 0000000..423d862
--- /dev/null
+++ b/Include/grammar.h
@@ -0,0 +1,78 @@
+/* Grammar interface */
+
+#include "bitset.h" /* Sigh... */
+
+/* A label of an arc */
+
+typedef struct _label {
+ int lb_type;
+ char *lb_str;
+} label;
+
+#define EMPTY 0 /* Label number 0 is by definition the empty label */
+
+/* A list of labels */
+
+typedef struct _labellist {
+ int ll_nlabels;
+ label *ll_label;
+} labellist;
+
+/* An arc from one state to another */
+
+typedef struct _arc {
+ short a_lbl; /* Label of this arc */
+ short a_arrow; /* State where this arc goes to */
+} arc;
+
+/* A state in a DFA */
+
+typedef struct _state {
+ int s_narcs;
+ arc *s_arc; /* Array of arcs */
+
+ /* Optional accelerators */
+ int s_lower; /* Lowest label index */
+ int s_upper; /* Highest label index */
+ int *s_accel; /* Accelerator */
+ int s_accept; /* Nonzero for accepting state */
+} state;
+
+/* A DFA */
+
+typedef struct _dfa {
+ int d_type; /* Non-terminal this represents */
+ char *d_name; /* For printing */
+ int d_initial; /* Initial state */
+ int d_nstates;
+ state *d_state; /* Array of states */
+ bitset d_first;
+} dfa;
+
+/* A grammar */
+
+typedef struct _grammar {
+ int g_ndfas;
+ dfa *g_dfa; /* Array of DFAs */
+ labellist g_ll;
+ int g_start; /* Start symbol of the grammar */
+ int g_accel; /* Set if accelerators present */
+} grammar;
+
+/* FUNCTIONS */
+
+grammar *newgrammar PROTO((int start));
+dfa *adddfa PROTO((grammar *g, int type, char *name));
+int addstate PROTO((dfa *d));
+void addarc PROTO((dfa *d, int from, int to, int lbl));
+dfa *finddfa PROTO((grammar *g, int type));
+char *typename PROTO((grammar *g, int lbl));
+
+int addlabel PROTO((labellist *ll, int type, char *str));
+int findlabel PROTO((labellist *ll, int type, char *str));
+char *labelrepr PROTO((label *lb));
+void translatelabels PROTO((grammar *g));
+
+void addfirstsets PROTO((grammar *g));
+
+void addaccellerators PROTO((grammar *g));