diff --git a/Parser/acceler.c b/Parser/acceler.c
index 7ff10b2..ce16711 100644
--- a/Parser/acceler.c
+++ b/Parser/acceler.c
@@ -1,11 +1,52 @@
 /* Parser accelerator module */
 
-#include <stdio.h>
+/* The parser as originally conceived had disappointing performance.
+   This module does some precomputation that speeds up the selection
+   of a DFA based upon a token, turning a search through an array
+   into a simple indexing operation.  The parser now cannot work
+   without the accelerators installed.  Note that the accelerators
+   are installed dynamically when the parser is initialized, they
+   are not part of the static data structure written on graminit.[ch]
+   by the parser generator. */
 
-#include "PROTO.h"
+#include "pgenheaders.h"
 #include "grammar.h"
 #include "token.h"
-#include "malloc.h"
+#include "parser.h"
+
+/* Forward references */
+static void fixdfa PROTO((grammar *, dfa *));
+static void fixstate PROTO((grammar *, dfa *, state *));
+
+void
+addaccelerators(g)
+	grammar *g;
+{
+	dfa *d;
+	int i;
+#ifdef DEBUG
+	printf("Adding parser accellerators ...\n");
+#endif
+	d = g->g_dfa;
+	for (i = g->g_ndfas; --i >= 0; d++)
+		fixdfa(g, d);
+	g->g_accel = 1;
+#ifdef DEBUG
+	printf("Done.\n");
+#endif
+}
+
+static void
+fixdfa(g, d)
+	grammar *g;
+	dfa *d;
+{
+	state *s;
+	int j;
+	s = d->d_state;
+	for (j = 0; j < d->d_nstates; j++, s++)
+		fixstate(g, d, s);
+}
 
 static void
 fixstate(g, d, s)
@@ -69,33 +110,3 @@
 	}
 	DEL(accel);
 }
-
-static void
-fixdfa(g, d)
-	grammar *g;
-	dfa *d;
-{
-	state *s;
-	int j;
-	s = d->d_state;
-	for (j = 0; j < d->d_nstates; j++, s++)
-		fixstate(g, d, s);
-}
-
-void
-addaccelerators(g)
-	grammar *g;
-{
-	dfa *d;
-	int i;
-#ifdef DEBUG
-	printf("Adding parser accellerators ...\n");
-#endif
-	d = g->g_dfa;
-	for (i = g->g_ndfas; --i >= 0; d++)
-		fixdfa(g, d);
-	g->g_accel = 1;
-#ifdef DEBUG
-	printf("Done.\n");
-#endif
-}
diff --git a/Parser/bitset.c b/Parser/bitset.c
index b43fb82..655240a 100644
--- a/Parser/bitset.c
+++ b/Parser/bitset.c
@@ -1,7 +1,6 @@
-/* Bitset primitives */
+/* Bitset primitives used by the parser generator */
 
-#include "PROTO.h"
-#include "malloc.h"
+#include "pgenheaders.h"
 #include "bitset.h"
 
 bitset
diff --git a/Parser/firstsets.c b/Parser/firstsets.c
index 0f28dd0..b4a9e3c 100644
--- a/Parser/firstsets.c
+++ b/Parser/firstsets.c
@@ -1,14 +1,29 @@
 /* Computation of FIRST stets */
 
-#include <stdio.h>
-
-#include "PROTO.h"
-#include "malloc.h"
+#include "pgenheaders.h"
 #include "grammar.h"
 #include "token.h"
 
 extern int debugging;
 
+/* Forward */
+static void calcfirstset PROTO((grammar *, dfa *));
+
+void
+addfirstsets(g)
+	grammar *g;
+{
+	int i;
+	dfa *d;
+	
+	printf("Adding FIRST sets ...\n");
+	for (i = 0; i < g->g_ndfas; i++) {
+		d = &g->g_dfa[i];
+		if (d->d_first == NULL)
+			calcfirstset(g, d);
+	}
+}
+
 static void
 calcfirstset(g, d)
 	grammar *g;
@@ -92,18 +107,3 @@
 		printf(" }\n");
 	}
 }
-
-void
-addfirstsets(g)
-	grammar *g;
-{
-	int i;
-	dfa *d;
-	
-	printf("Adding FIRST sets ...\n");
-	for (i = 0; i < g->g_ndfas; i++) {
-		d = &g->g_dfa[i];
-		if (d->d_first == NULL)
-			calcfirstset(g, d);
-	}
-}
diff --git a/Parser/grammar.c b/Parser/grammar.c
index ad9c2b0..221bf64 100644
--- a/Parser/grammar.c
+++ b/Parser/grammar.c
@@ -1,10 +1,9 @@
 /* Grammar implementation */
 
-#include <stdio.h>
+#include "pgenheaders.h"
+
 #include <ctype.h>
 
-#include "PROTO.h"
-#include "malloc.h"
 #include "assert.h"
 #include "token.h"
 #include "grammar.h"
@@ -127,6 +126,21 @@
 	abort();
 }
 
+/* Forward */
+static void translabel PROTO((grammar *, label *));
+
+void
+translatelabels(g)
+	grammar *g;
+{
+	int i;
+	
+	printf("Translating labels ...\n");
+	/* Don't translate EMPTY */
+	for (i = EMPTY+1; i < g->g_ll.ll_nlabels; i++)
+		translabel(g, &g->g_ll.ll_label[i]);
+}
+
 static void
 translabel(g, lb)
 	grammar *g;
@@ -193,15 +207,3 @@
 	else
 		printf("Can't translate label '%s'\n", labelrepr(lb));
 }
-
-void
-translatelabels(g)
-	grammar *g;
-{
-	int i;
-	
-	printf("Translating labels ...\n");
-	/* Don't translate EMPTY */
-	for (i = EMPTY+1; i < g->g_ll.ll_nlabels; i++)
-		translabel(g, &g->g_ll.ll_label[i]);
-}
diff --git a/Parser/grammar1.c b/Parser/grammar1.c
index 0cd66af..6c10158 100644
--- a/Parser/grammar1.c
+++ b/Parser/grammar1.c
@@ -1,7 +1,6 @@
 /* Grammar subroutines needed by parser */
 
-#include "PROTO.h"
-#define NULL 0
+#include "pgenheaders.h"
 #include "assert.h"
 #include "grammar.h"
 #include "token.h"
diff --git a/Parser/intrcheck.c b/Parser/intrcheck.c
index f963208..8c35114 100644
--- a/Parser/intrcheck.c
+++ b/Parser/intrcheck.c
@@ -2,7 +2,7 @@
 
 #ifdef MSDOS
 
-/* This might work for MS-DOS: */
+/* This might work for MS-DOS (untested though): */
 
 void
 initintr()
@@ -37,7 +37,7 @@
 int
 intrcheck()
 {
-	/* Static to make it faster(?) only */
+	/* Static to make it faster only */
 	static EventRecord e;
 	
 	/* XXX This fails if the user first types ahead and then
@@ -59,7 +59,7 @@
 
 #ifndef OK
 
-/* Default version -- should work for Unix and Standard C */
+/* Default version -- for real operating systems and for Standard C */
 
 #include <stdio.h>
 #include <signal.h>
diff --git a/Parser/listnode.c b/Parser/listnode.c
index e0a979e..9d24c0f 100644
--- a/Parser/listnode.c
+++ b/Parser/listnode.c
@@ -1,13 +1,31 @@
 /* List a node on a file */
 
-#include <stdio.h>
-
-#include "PROTO.h"
+#include "pgenheaders.h"
 #include "token.h"
 #include "node.h"
 
+/* Forward */
+static void list1node PROTO((FILE *, node *));
+
+void
+listtree(n)
+	node *n;
+{
+	listnode(stdout, n);
+}
+
 static int level, atbol;
 
+void
+listnode(fp, n)
+	FILE *fp;
+	node *n;
+{
+	level = 0;
+	atbol = 1;
+	list1node(fp, n);
+}
+
 static void
 list1node(fp, n)
 	FILE *fp;
@@ -49,20 +67,3 @@
 	else
 		fprintf(fp, "? ");
 }
-
-void
-listnode(fp, n)
-	FILE *fp;
-	node *n;
-{
-	level = 0;
-	atbol = 1;
-	list1node(fp, n);
-}
-
-void
-listtree(n)
-	node *n;
-{
-	listnode(stdout, n);
-}
diff --git a/Parser/metagrammar.c b/Parser/metagrammar.c
index a7e6364..c4606a5 100644
--- a/Parser/metagrammar.c
+++ b/Parser/metagrammar.c
@@ -1,6 +1,7 @@
-#include "PROTO.h"
+#include "pgenheaders.h"
 #include "metagrammar.h"
 #include "grammar.h"
+#include "pgen.h"
 static arc arcs_0_0[3] = {
 	{2, 0},
 	{3, 0},
diff --git a/Parser/node.c b/Parser/node.c
index 264fd9e..024dbd4 100644
--- a/Parser/node.c
+++ b/Parser/node.c
@@ -1,11 +1,10 @@
 /* Parse tree node implementation */
 
-#include "PROTO.h"
-#include "malloc.h"
+#include "pgenheaders.h"
 #include "node.h"
 
 node *
-newnode(type)
+newtree(type)
 	int type;
 {
 	node *n = NEW(node, 1);
@@ -13,6 +12,7 @@
 		return NULL;
 	n->n_type = type;
 	n->n_str = NULL;
+	n->n_lineno = 0;
 	n->n_nchildren = 0;
 	n->n_child = NULL;
 	return n;
@@ -22,10 +22,11 @@
 #define XXXROUNDUP(n) ((n) == 1 ? 1 : ((n) + XXX - 1) / XXX * XXX)
 
 node *
-addchild(n1, type, str)
+addchild(n1, type, str, lineno)
 	register node *n1;
 	int type;
 	char *str;
+	int lineno;
 {
 	register int nch = n1->n_nchildren;
 	register int nch1 = nch+1;
@@ -41,11 +42,26 @@
 	n = &n1->n_child[n1->n_nchildren++];
 	n->n_type = type;
 	n->n_str = str;
+	n->n_lineno = lineno;
 	n->n_nchildren = 0;
 	n->n_child = NULL;
 	return n;
 }
 
+/* Forward */
+static void freechildren PROTO((node *));
+
+
+void
+freetree(n)
+	node *n;
+{
+	if (n != NULL) {
+		freechildren(n);
+		DEL(n);
+	}
+}
+
 static void
 freechildren(n)
 	node *n;
@@ -58,13 +74,3 @@
 	if (STR(n) != NULL)
 		DEL(STR(n));
 }
-
-void
-freenode(n)
-	node *n;
-{
-	if (n != NULL) {
-		freechildren(n);
-		DEL(n);
-	}
-}
diff --git a/Parser/parser.c b/Parser/parser.c
index 294c534..831d870 100644
--- a/Parser/parser.c
+++ b/Parser/parser.c
@@ -4,20 +4,17 @@
 
 /* XXX To do: error recovery */
 
-#include <stdio.h>
+#include "pgenheaders.h"
 #include "assert.h"
-
-#include "PROTO.h"
-#include "malloc.h"
 #include "token.h"
 #include "grammar.h"
 #include "node.h"
 #include "parser.h"
 #include "errcode.h"
 
-extern int debugging;
 
 #ifdef DEBUG
+extern int debugging;
 #define D(x) if (!debugging); else x
 #else
 #define D(x)
@@ -94,7 +91,7 @@
 	if (ps == NULL)
 		return NULL;
 	ps->p_grammar = g;
-	ps->p_tree = newnode(start);
+	ps->p_tree = newtree(start);
 	if (ps->p_tree == NULL) {
 		DEL(ps);
 		return NULL;
@@ -110,24 +107,25 @@
 {
 	/* NB If you want to save the parse tree,
 	   you must set p_tree to NULL before calling delparser! */
-	freenode(ps->p_tree);
+	freetree(ps->p_tree);
 	DEL(ps);
 }
 
 
 /* PARSER STACK OPERATIONS */
 
-static int shift PROTO((stack *, int, char *, int));
+static int shift PROTO((stack *, int, char *, int, int));
 
 static int
-shift(s, type, str, newstate)
+shift(s, type, str, newstate, lineno)
 	register stack *s;
 	int type;
 	char *str;
 	int newstate;
+	int lineno;
 {
 	assert(!s_empty(s));
-	if (addchild(s->s_top->s_parent, type, str) == NULL) {
+	if (addchild(s->s_top->s_parent, type, str, lineno) == NULL) {
 		fprintf(stderr, "shift: no mem in addchild\n");
 		return -1;
 	}
@@ -135,19 +133,20 @@
 	return 0;
 }
 
-static int push PROTO((stack *, int, dfa *, int));
+static int push PROTO((stack *, int, dfa *, int, int));
 
 static int
-push(s, type, d, newstate)
+push(s, type, d, newstate, lineno)
 	register stack *s;
 	int type;
 	dfa *d;
 	int newstate;
+	int lineno;
 {
 	register node *n;
 	n = s->s_top->s_parent;
 	assert(!s_empty(s));
-	if (addchild(n, type, (char *)NULL) == NULL) {
+	if (addchild(n, type, (char *)NULL, lineno) == NULL) {
 		fprintf(stderr, "push: no mem in addchild\n");
 		return -1;
 	}
@@ -198,10 +197,11 @@
 }
 
 int
-addtoken(ps, type, str)
+addtoken(ps, type, str, lineno)
 	register parser_state *ps;
 	register int type;
 	char *str;
+	int lineno;
 {
 	register int ilabel;
 	
@@ -230,7 +230,8 @@
 					int nt = (x >> 8) + NT_OFFSET;
 					int arrow = x & ((1<<7)-1);
 					dfa *d1 = finddfa(ps->p_grammar, nt);
-					if (push(&ps->p_stack, nt, d1, arrow) < 0) {
+					if (push(&ps->p_stack, nt, d1,
+						arrow, lineno) < 0) {
 						D(printf(" MemError: push.\n"));
 						return E_NOMEM;
 					}
@@ -239,7 +240,8 @@
 				}
 				
 				/* Shift the token */
-				if (shift(&ps->p_stack, type, str, x) < 0) {
+				if (shift(&ps->p_stack, type, str,
+						x, lineno) < 0) {
 					D(printf(" MemError: shift.\n"));
 					return E_NOMEM;
 				}
diff --git a/Parser/parser.h b/Parser/parser.h
index 16eee0e..1ada8cc 100644
--- a/Parser/parser.h
+++ b/Parser/parser.h
@@ -5,7 +5,7 @@
 typedef struct _stackentry {
 	int		 s_state;	/* State in current DFA */
 	dfa		*s_dfa;		/* Current DFA */
-	node		*s_parent;	/* Where to add next node */
+	struct _node	*s_parent;	/* Where to add next node */
 } stackentry;
 
 typedef struct _stack {
@@ -22,4 +22,5 @@
 
 parser_state *newparser PROTO((struct _grammar *g, int start));
 void delparser PROTO((parser_state *ps));
-int addtoken PROTO((parser_state *ps, int type, char *str));
+int addtoken PROTO((parser_state *ps, int type, char *str, int lineno));
+void addaccelerators PROTO((grammar *g));
diff --git a/Parser/parsetok.c b/Parser/parsetok.c
index 100ca65..c75656f 100644
--- a/Parser/parsetok.c
+++ b/Parser/parsetok.c
@@ -1,16 +1,82 @@
 /* Parser-tokenizer link implementation */
 
-#include <stdio.h>
-
-#include "PROTO.h"
-#include "malloc.h"
+#include "pgenheaders.h"
 #include "tokenizer.h"
 #include "node.h"
 #include "grammar.h"
 #include "parser.h"
+#include "parsetok.h"
 #include "errcode.h"
 
-extern int debugging;
+
+/* Forward */
+static int parsetok PROTO((struct tok_state *, grammar *, int, node **));
+
+
+/* Parse input coming from a string.  Return error code, print some errors. */
+
+int
+parsestring(s, g, start, n_ret)
+	char *s;
+	grammar *g;
+	int start;
+	node **n_ret;
+{
+	struct tok_state *tok = tok_setups(s);
+	int ret;
+	
+	if (tok == NULL) {
+		fprintf(stderr, "no mem for tok_setups\n");
+		return E_NOMEM;
+	}
+	ret = parsetok(tok, g, start, n_ret);
+	if (ret == E_TOKEN || ret == E_SYNTAX) {
+		fprintf(stderr, "String parsing error at line %d\n",
+			tok->lineno);
+	}
+	tok_free(tok);
+	return ret;
+}
+
+
+/* Parse input coming from a file.  Return error code, print some errors. */
+
+int
+parsefile(fp, filename, g, start, ps1, ps2, n_ret)
+	FILE *fp;
+	char *filename;
+	grammar *g;
+	int start;
+	char *ps1, *ps2;
+	node **n_ret;
+{
+	struct tok_state *tok = tok_setupf(fp, ps1, ps2);
+	int ret;
+	
+	if (tok == NULL) {
+		fprintf(stderr, "no mem for tok_setupf\n");
+		return E_NOMEM;
+	}
+	ret = parsetok(tok, g, start, n_ret);
+	if (ret == E_TOKEN || ret == E_SYNTAX) {
+		char *p;
+		fprintf(stderr, "Parsing error: file %s, line %d:\n",
+						filename, tok->lineno);
+		*tok->inp = '\0';
+		if (tok->inp > tok->buf && tok->inp[-1] == '\n')
+			tok->inp[-1] = '\0';
+		fprintf(stderr, "%s\n", tok->buf);
+		for (p = tok->buf; p < tok->cur; p++) {
+			if (*p == '\t')
+				putc('\t', stderr);
+			else
+				putc(' ', stderr);
+		}
+		fprintf(stderr, "^\n");
+	}
+	tok_free(tok);
+	return ret;
+}
 
 
 /* Parse input coming from the given tokenizer structure.
@@ -51,7 +117,7 @@
 		}
 		strncpy(str, a, len);
 		str[len] = '\0';
-		ret = addtoken(ps, (int)type, str);
+		ret = addtoken(ps, (int)type, str, tok->lineno);
 		if (ret != E_OK) {
 			if (ret == E_DONE) {
 				*n_ret = ps->p_tree;
@@ -66,67 +132,3 @@
 	delparser(ps);
 	return ret;
 }
-
-
-/* Parse input coming from a string.  Return error code. */
-
-int
-parsestring(s, g, start, n_ret)
-	char *s;
-	grammar *g;
-	int start;
-	node **n_ret;
-{
-	struct tok_state *tok = tok_setups(s);
-	int ret;
-	
-	if (tok == NULL) {
-		fprintf(stderr, "no mem for tok_setups\n");
-		return E_NOMEM;
-	}
-	ret = parsetok(tok, g, start, n_ret);
-	if (ret == E_TOKEN || ret == E_SYNTAX) {
-		fprintf(stderr, "String parsing error at line %d\n",
-			tok->lineno);
-	}
-	tok_free(tok);
-	return ret;
-}
-
-
-/* Parse input coming from a file.  Return error code. */
-
-int
-parsefile(fp, g, start, ps1, ps2, n_ret)
-	FILE *fp;
-	grammar *g;
-	int start;
-	char *ps1, *ps2;
-	node **n_ret;
-{
-	struct tok_state *tok = tok_setupf(fp, ps1, ps2);
-	int ret;
-	
-	if (tok == NULL) {
-		fprintf(stderr, "no mem for tok_setupf\n");
-		return E_NOMEM;
-	}
-	ret = parsetok(tok, g, start, n_ret);
-	if (ret == E_TOKEN || ret == E_SYNTAX) {
-		char *p;
-		fprintf(stderr, "Parsing error at line %d:\n", tok->lineno);
-		*tok->inp = '\0';
-		if (tok->inp > tok->buf && tok->inp[-1] == '\n')
-			tok->inp[-1] = '\0';
-		fprintf(stderr, "%s\n", tok->buf);
-		for (p = tok->buf; p < tok->cur; p++) {
-			if (*p == '\t')
-				putc('\t', stderr);
-			else
-				putc(' ', stderr);
-		}
-		fprintf(stderr, "^\n");
-	}
-	tok_free(tok);
-	return ret;
-}
diff --git a/Parser/pgen.c b/Parser/pgen.c
index 34d9b71..21795d6 100644
--- a/Parser/pgen.c
+++ b/Parser/pgen.c
@@ -1,12 +1,10 @@
 /* Parser generator */
+/* XXX This file is not yet fully PROTOized */
 
 /* For a description, see the comments at end of this file */
 
-#include <stdio.h>
+#include "pgenheaders.h"
 #include "assert.h"
-
-#include "PROTO.h"
-#include "malloc.h"
 #include "token.h"
 #include "node.h"
 #include "grammar.h"
diff --git a/Parser/pgen.h b/Parser/pgen.h
index 7fcf277..45eb2ed 100644
--- a/Parser/pgen.h
+++ b/Parser/pgen.h
@@ -3,4 +3,4 @@
 extern grammar gram;
 
 extern grammar *meta_grammar PROTO((void));
-extern grammar *pgen PROTO((node *));
+extern grammar *pgen PROTO((struct _node *));
diff --git a/Parser/pgenmain.c b/Parser/pgenmain.c
index 678be5d..6eae230 100644
--- a/Parser/pgenmain.c
+++ b/Parser/pgenmain.c
@@ -1,8 +1,14 @@
 /* Parser generator main program */
 
-#include <stdio.h>
+/* This expects a filename containing the grammar as argv[1] (UNIX)
+   or asks the console for such a file name (THINK C).
+   It writes its output on two files in the current directory:
+   - "graminit.c" gets the grammar as a bunch of initialized data
+   - "graminit.h" gets the grammar's non-terminals as #defines.
+   Error messages and status info during the generation process are
+   written to stdout, or sometimes to stderr. */
 
-#include "PROTO.h"
+#include "pgenheaders.h"
 #include "grammar.h"
 #include "node.h"
 #include "parsetok.h"
@@ -10,54 +16,14 @@
 
 int debugging;
 
+/* Forward */
+grammar *getgrammar PROTO((char *filename));
 #ifdef THINK_C
-char *
-askfile()
-{
-	char buf[256];
-	static char name[256];
-	printf("Input file name: ");
-	if (fgets(buf, sizeof buf, stdin) == NULL) {
-		printf("EOF\n");
-		exit(1);
-	}
-	if (sscanf(buf, " %s ", name) != 1) {
-		printf("No file\n");
-		exit(1);
-	}
-	return name;
-}
+int main PROTO((int, char **));
+char *askfile PROTO((void));
 #endif
 
-grammar *
-getgrammar(filename)
-	char *filename;
-{
-	FILE *fp;
-	node *n;
-	grammar *g0, *g;
-	
-	fp = fopen(filename, "r");
-	if (fp == NULL) {
-		perror(filename);
-		exit(1);
-	}
-	g0 = meta_grammar();
-	n = NULL;
-	parsefile(fp, g0, g0->g_start, (char *)NULL, (char *)NULL, &n);
-	fclose(fp);
-	if (n == NULL) {
-		fprintf(stderr, "Parsing error.\n");
-		exit(1);
-	}
-	g = pgen(n);
-	if (g == NULL) {
-		printf("Bad grammar.\n");
-		exit(1);
-	}
-	return g;
-}
-
+int
 main(argc, argv)
 	int argc;
 	char **argv;
@@ -96,6 +62,55 @@
 	exit(0);
 }
 
+grammar *
+getgrammar(filename)
+	char *filename;
+{
+	FILE *fp;
+	node *n;
+	grammar *g0, *g;
+	
+	fp = fopen(filename, "r");
+	if (fp == NULL) {
+		perror(filename);
+		exit(1);
+	}
+	g0 = meta_grammar();
+	n = NULL;
+	parsefile(fp, filename, g0, g0->g_start, (char *)NULL, (char *)NULL, &n);
+	fclose(fp);
+	if (n == NULL) {
+		fprintf(stderr, "Parsing error.\n");
+		exit(1);
+	}
+	g = pgen(n);
+	if (g == NULL) {
+		printf("Bad grammar.\n");
+		exit(1);
+	}
+	return g;
+}
+
+#ifdef THINK_C
+char *
+askfile()
+{
+	char buf[256];
+	static char name[256];
+	printf("Input file name: ");
+	if (fgets(buf, sizeof buf, stdin) == NULL) {
+		printf("EOF\n");
+		exit(1);
+	}
+	/* XXX The (unsigned char *) case is needed by THINK C */
+	if (sscanf((unsigned char *)buf, " %s ", name) != 1) {
+		printf("No file\n");
+		exit(1);
+	}
+	return name;
+}
+#endif
+
 void
 fatal(msg)
 	char *msg;
@@ -104,8 +119,6 @@
 	exit(1);
 }
 
-/*	TO DO:
-
-	- improve user interface
-	- check for duplicate definitions of names (instead of fatal err)
+/* XXX TO DO:
+   - check for duplicate definitions of names (instead of fatal err)
 */
diff --git a/Parser/printgrammar.c b/Parser/printgrammar.c
index f6aa2cc..00a8d47 100644
--- a/Parser/printgrammar.c
+++ b/Parser/printgrammar.c
@@ -1,10 +1,44 @@
 /* Print a bunch of C initializers that represent a grammar */
 
-#include <stdio.h>
-
-#include "PROTO.h"
+#include "pgenheaders.h"
 #include "grammar.h"
 
+/* Forward */
+static void printarcs PROTO((int, dfa *, FILE *));
+static void printstates PROTO((grammar *, FILE *));
+static void printdfas PROTO((grammar *, FILE *));
+static void printlabels PROTO((grammar *, FILE *));
+
+void
+printgrammar(g, fp)
+	grammar *g;
+	FILE *fp;
+{
+	fprintf(fp, "#include \"pgenheaders.h\"\n");
+	fprintf(fp, "#include \"grammar.h\"\n");
+	printdfas(g, fp);
+	printlabels(g, fp);
+	fprintf(fp, "grammar gram = {\n");
+	fprintf(fp, "\t%d,\n", g->g_ndfas);
+	fprintf(fp, "\tdfas,\n");
+	fprintf(fp, "\t{%d, labels},\n", g->g_ll.ll_nlabels);
+	fprintf(fp, "\t%d\n", g->g_start);
+	fprintf(fp, "};\n");
+}
+
+void
+printnonterminals(g, fp)
+	grammar *g;
+	FILE *fp;
+{
+	dfa *d;
+	int i;
+	
+	d = g->g_dfa;
+	for (i = g->g_ndfas; --i >= 0; d++)
+		fprintf(fp, "#define %s %d\n", d->d_name, d->d_type);
+}
+
 static void
 printarcs(i, d, fp)
 	int i;
@@ -89,33 +123,3 @@
 	}
 	fprintf(fp, "};\n");
 }
-
-void
-printgrammar(g, fp)
-	grammar *g;
-	FILE *fp;
-{
-	fprintf(fp, "#include \"PROTO.h\"\n");
-	fprintf(fp, "#include \"grammar.h\"\n");
-	printdfas(g, fp);
-	printlabels(g, fp);
-	fprintf(fp, "grammar gram = {\n");
-	fprintf(fp, "\t%d,\n", g->g_ndfas);
-	fprintf(fp, "\tdfas,\n");
-	fprintf(fp, "\t{%d, labels},\n", g->g_ll.ll_nlabels);
-	fprintf(fp, "\t%d\n", g->g_start);
-	fprintf(fp, "};\n");
-}
-
-void
-printnonterminals(g, fp)
-	grammar *g;
-	FILE *fp;
-{
-	dfa *d;
-	int i;
-	
-	d = g->g_dfa;
-	for (i = g->g_ndfas; --i >= 0; d++)
-		fprintf(fp, "#define %s %d\n", d->d_name, d->d_type);
-}
diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c
index 97eda75..ad6f63a 100644
--- a/Parser/tokenizer.c
+++ b/Parser/tokenizer.c
@@ -2,13 +2,14 @@
 
 /* XXX This is rather old, should be restructured perhaps */
 /* XXX Need a better interface to report errors than writing to stderr */
+/* XXX Should use editor resource to fetch true tab size on Macintosh */
 
-#include <stdio.h>
+#include "pgenheaders.h"
+
 #include <ctype.h>
 #include "string.h"
 
-#include "PROTO.h"
-#include "malloc.h"
+#include "fgetsintr.h"
 #include "tokenizer.h"
 #include "errcode.h"
 
@@ -20,6 +21,11 @@
 #define TABSIZE 8
 #endif
 
+/* Forward */
+static struct tok_state *tok_new PROTO((void));
+static int tok_nextc PROTO((struct tok_state *tok));
+static void tok_backup PROTO((struct tok_state *tok, int c));
+
 /* Token names */
 
 char *tok_name[] = {
@@ -352,7 +358,9 @@
 		   This is also recognized by vi, when it occurs near the
 		   beginning or end of the file.  (Will vi never die...?) */
 		int x;
-		if (sscanf(tok->cur, " vi:set tabsize=%d:", &x) == 1 &&
+		/* XXX The case to (unsigned char *) is needed by THINK C */
+		if (sscanf((unsigned char *)tok->cur,
+				" vi:set tabsize=%d:", &x) == 1 &&
 						x >= 1 && x <= 40) {
 			fprintf(stderr, "# vi:set tabsize=%d:\n", x);
 			tok->tabsize = x;