first commit

11 files changed, 3036 insertions, 0 deletions

diff --git a/src/tools/lcc/cpp/cpp.c b/src/tools/lcc/cpp/cpp.c
new file mode 100644
index 0000000..5c0cfd7
--- /dev/null
+++ b/src/tools/lcc/cpp/cpp.c
@@ -0,0 +1,326 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <stdarg.h>
+#include "cpp.h"
+
+char rcsid[] = "cpp.c - faked rcsid";
+
+#define	OUTS	16384
+char	outbuf[OUTS];
+char	*outbufp = outbuf;
+Source	*cursource;
+int	nerrs;
+struct	token nltoken = { NL, 0, 0, 0, 1, (uchar*)"\n" };
+char	*curtime;
+int	incdepth;
+int	ifdepth;
+int	ifsatisfied[NIF];
+int	skipping;
+
+
+int
+main(int argc, char **argv)
+{
+	Tokenrow tr;
+	time_t t;
+	char ebuf[BUFSIZ];
+
+	setbuf(stderr, ebuf);
+	t = time(NULL);
+	curtime = ctime(&t);
+	maketokenrow(3, &tr);
+	expandlex();
+	setup(argc, argv);
+	fixlex();
+	iniths();
+	genline();
+	process(&tr);
+	flushout();
+	fflush(stderr);
+	exit(nerrs > 0);
+	return 0;
+}
+
+void
+process(Tokenrow *trp)
+{
+	int anymacros = 0;
+
+	for (;;) {
+		if (trp->tp >= trp->lp) {
+			trp->tp = trp->lp = trp->bp;
+			outbufp = outbuf;
+			anymacros |= gettokens(trp, 1);
+			trp->tp = trp->bp;
+		}
+		if (trp->tp->type == END) {
+			if (--incdepth>=0) {
+				if (cursource->ifdepth)
+					error(ERROR,
+					 "Unterminated conditional in #include");
+				unsetsource();
+				cursource->line += cursource->lineinc;
+				trp->tp = trp->lp;
+				genline();
+				continue;
+			}
+			if (ifdepth)
+				error(ERROR, "Unterminated #if/#ifdef/#ifndef");
+			break;
+		}
+		if (trp->tp->type==SHARP) {
+			trp->tp += 1;
+			control(trp);
+		} else if (!skipping && anymacros)
+			expandrow(trp, NULL);
+		if (skipping)
+			setempty(trp);
+		puttokens(trp);
+		anymacros = 0;
+		cursource->line += cursource->lineinc;
+		if (cursource->lineinc>1) {
+			genline();
+		}
+	}
+}
+	
+void
+control(Tokenrow *trp)
+{
+	Nlist *np;
+	Token *tp;
+
+	tp = trp->tp;
+	if (tp->type!=NAME) {
+		if (tp->type==NUMBER)
+			goto kline;
+		if (tp->type != NL)
+			error(ERROR, "Unidentifiable control line");
+		return;			/* else empty line */
+	}
+	if ((np = lookup(tp, 0))==NULL || ((np->flag&ISKW)==0 && !skipping)) {
+		error(WARNING, "Unknown preprocessor control %t", tp);
+		return;
+	}
+	if (skipping) {
+		switch (np->val) {
+		case KENDIF:
+			if (--ifdepth<skipping)
+				skipping = 0;
+			--cursource->ifdepth;
+			setempty(trp);
+			return;
+
+		case KIFDEF:
+		case KIFNDEF:
+		case KIF:
+			if (++ifdepth >= NIF)
+				error(FATAL, "#if too deeply nested");
+			++cursource->ifdepth;
+			return;
+
+		case KELIF:
+		case KELSE:
+			if (ifdepth<=skipping)
+				break;
+			return;
+
+		default:
+			return;
+		}
+	}
+	switch (np->val) {
+	case KDEFINE:
+		dodefine(trp);
+		break;
+
+	case KUNDEF:
+		tp += 1;
+		if (tp->type!=NAME || trp->lp - trp->bp != 4) {
+			error(ERROR, "Syntax error in #undef");
+			break;
+		}
+		if ((np = lookup(tp, 0)) != NULL)
+			np->flag &= ~ISDEFINED;
+		break;
+
+	case KPRAGMA:
+		return;
+
+	case KIFDEF:
+	case KIFNDEF:
+	case KIF:
+		if (++ifdepth >= NIF)
+			error(FATAL, "#if too deeply nested");
+		++cursource->ifdepth;
+		ifsatisfied[ifdepth] = 0;
+		if (eval(trp, np->val))
+			ifsatisfied[ifdepth] = 1;
+		else
+			skipping = ifdepth;
+		break;
+
+	case KELIF:
+		if (ifdepth==0) {
+			error(ERROR, "#elif with no #if");
+			return;
+		}
+		if (ifsatisfied[ifdepth]==2)
+			error(ERROR, "#elif after #else");
+		if (eval(trp, np->val)) {
+			if (ifsatisfied[ifdepth])
+				skipping = ifdepth;
+			else {
+				skipping = 0;
+				ifsatisfied[ifdepth] = 1;
+			}
+		} else
+			skipping = ifdepth;
+		break;
+
+	case KELSE:
+		if (ifdepth==0 || cursource->ifdepth==0) {
+			error(ERROR, "#else with no #if");
+			return;
+		}
+		if (ifsatisfied[ifdepth]==2)
+			error(ERROR, "#else after #else");
+		if (trp->lp - trp->bp != 3)
+			error(ERROR, "Syntax error in #else");
+		skipping = ifsatisfied[ifdepth]? ifdepth: 0;
+		ifsatisfied[ifdepth] = 2;
+		break;
+
+	case KENDIF:
+		if (ifdepth==0 || cursource->ifdepth==0) {
+			error(ERROR, "#endif with no #if");
+			return;
+		}
+		--ifdepth;
+		--cursource->ifdepth;
+		if (trp->lp - trp->bp != 3)
+			error(WARNING, "Syntax error in #endif");
+		break;
+
+	case KWARNING:
+		trp->tp = tp+1;
+		error(WARNING, "#warning directive: %r", trp);
+		break;
+
+	case KERROR:
+		trp->tp = tp+1;
+		error(ERROR, "#error directive: %r", trp);
+		break;
+
+	case KLINE:
+		trp->tp = tp+1;
+		expandrow(trp, "<line>");
+		tp = trp->bp+2;
+	kline:
+		if (tp+1>=trp->lp || tp->type!=NUMBER || tp+3<trp->lp
+		 || ((tp+3==trp->lp && ((tp+1)->type!=STRING))||*(tp+1)->t=='L')){
+			error(ERROR, "Syntax error in #line");
+			return;
+		}
+		cursource->line = atol((char*)tp->t)-1;
+		if (cursource->line<0 || cursource->line>=32768)
+			error(WARNING, "#line specifies number out of range");
+		tp = tp+1;
+		if (tp+1<trp->lp)
+			cursource->filename=(char*)newstring(tp->t+1,tp->len-2,0);
+		return;
+
+	case KDEFINED:
+		error(ERROR, "Bad syntax for control line");
+		break;
+
+	case KINCLUDE:
+		doinclude(trp);
+		trp->lp = trp->bp;
+		return;
+
+	case KEVAL:
+		eval(trp, np->val);
+		break;
+
+	default:
+		error(ERROR, "Preprocessor control `%t' not yet implemented", tp);
+		break;
+	}
+	setempty(trp);
+}
+
+void *
+domalloc(int size)
+{
+	void *p = malloc(size);
+
+	if (p==NULL)
+		error(FATAL, "Out of memory from malloc");
+	return p;
+}
+
+void
+dofree(void *p)
+{
+	free(p);
+}
+
+void
+error(enum errtype type, char *string, ...)
+{
+	va_list ap;
+	char *cp, *ep;
+	Token *tp;
+	Tokenrow *trp;
+	Source *s;
+	int i;
+
+	fprintf(stderr, "cpp: ");
+	for (s=cursource; s; s=s->next)
+		if (*s->filename)
+			fprintf(stderr, "%s:%d ", s->filename, s->line);
+	va_start(ap, string);
+	for (ep=string; *ep; ep++) {
+		if (*ep=='%') {
+			switch (*++ep) {
+
+			case 's':
+				cp = va_arg(ap, char *);
+				fprintf(stderr, "%s", cp);
+				break;
+			case 'd':
+				i = va_arg(ap, int);
+				fprintf(stderr, "%d", i);
+				break;
+			case 't':
+				tp = va_arg(ap, Token *);
+				fprintf(stderr, "%.*s", tp->len, tp->t);
+				break;
+
+			case 'r':
+				trp = va_arg(ap, Tokenrow *);
+				for (tp=trp->tp; tp<trp->lp&&tp->type!=NL; tp++) {
+					if (tp>trp->tp && tp->wslen)
+						fputc(' ', stderr);
+					fprintf(stderr, "%.*s", tp->len, tp->t);
+				}
+				break;
+
+			default:
+				fputc(*ep, stderr);
+				break;
+			}
+		} else
+			fputc(*ep, stderr);
+	}
+	va_end(ap);
+	fputc('\n', stderr);
+	if (type==FATAL)
+		exit(1);
+	if (type!=WARNING)
+		nerrs = 1;
+	fflush(stderr);
+}
diff --git a/src/tools/lcc/cpp/cpp.h b/src/tools/lcc/cpp/cpp.h
new file mode 100644
index 0000000..ddd7502
--- /dev/null
+++ b/src/tools/lcc/cpp/cpp.h
@@ -0,0 +1,166 @@
+#define	INS	32768		/* input buffer */
+#define	OBS	4096		/* outbut buffer */
+#define	NARG	32		/* Max number arguments to a macro */
+#define	NINCLUDE 32		/* Max number of include directories (-I) */
+#define	NIF	32		/* depth of nesting of #if */
+#ifndef EOF
+#define	EOF	(-1)
+#endif
+#ifndef NULL
+#define NULL	0
+#endif
+
+#ifndef __alpha
+typedef unsigned char uchar;
+#endif
+
+enum toktype { END, UNCLASS, NAME, NUMBER, STRING, CCON, NL, WS, DSHARP,
+		EQ, NEQ, LEQ, GEQ, LSH, RSH, LAND, LOR, PPLUS, MMINUS,
+		ARROW, SBRA, SKET, LP, RP, DOT, AND, STAR, PLUS, MINUS,
+		TILDE, NOT, SLASH, PCT, LT, GT, CIRC, OR, QUEST,
+		COLON, ASGN, COMMA, SHARP, SEMIC, CBRA, CKET,
+		ASPLUS, ASMINUS, ASSTAR, ASSLASH, ASPCT, ASCIRC, ASLSH,
+		ASRSH, ASOR, ASAND, ELLIPS,
+		DSHARP1, NAME1, DEFINED, UMINUS };
+
+enum kwtype { KIF, KIFDEF, KIFNDEF, KELIF, KELSE, KENDIF, KINCLUDE, KDEFINE,
+		KUNDEF, KLINE, KWARNING, KERROR, KPRAGMA, KDEFINED,
+		KLINENO, KFILE, KDATE, KTIME, KSTDC, KEVAL };
+
+#define	ISDEFINED	01	/* has #defined value */
+#define	ISKW		02	/* is PP keyword */
+#define	ISUNCHANGE	04	/* can't be #defined in PP */
+#define	ISMAC		010	/* builtin macro, e.g. __LINE__ */
+
+#define	EOB	0xFE		/* sentinel for end of input buffer */
+#define	EOFC	0xFD		/* sentinel for end of input file */
+#define	XPWS	1		/* token flag: white space to assure token sep. */
+
+typedef struct token {
+	unsigned char	type;
+	unsigned char 	flag;
+	unsigned short	hideset;
+	unsigned int	wslen;
+	unsigned int	len;
+	uchar	*t;
+} Token;
+
+typedef struct tokenrow {
+	Token	*tp;		/* current one to scan */
+	Token	*bp;		/* base (allocated value) */
+	Token	*lp;		/* last+1 token used */
+	int	max;		/* number allocated */
+} Tokenrow;
+
+typedef struct source {
+	char	*filename;	/* name of file of the source */
+	int	line;		/* current line number */
+	int	lineinc;	/* adjustment for \\n lines */
+	uchar	*inb;		/* input buffer */
+	uchar	*inp;		/* input pointer */
+	uchar	*inl;		/* end of input */
+	int	fd;		/* input source */
+	int	ifdepth;	/* conditional nesting in include */
+	struct	source *next;	/* stack for #include */
+} Source;
+
+typedef struct nlist {
+	struct nlist *next;
+	uchar	*name;
+	int	len;
+	Tokenrow *vp;		/* value as macro */
+	Tokenrow *ap;		/* list of argument names, if any */
+	char	val;		/* value as preprocessor name */
+	char	flag;		/* is defined, is pp name */
+} Nlist;
+
+typedef	struct	includelist {
+	char	deleted;
+	char	always;
+	char	*file;
+} Includelist;
+
+#define	new(t)	(t *)domalloc(sizeof(t))
+#define	quicklook(a,b)	(namebit[(a)&077] & (1<<((b)&037)))
+#define	quickset(a,b)	namebit[(a)&077] |= (1<<((b)&037))
+extern	unsigned long namebit[077+1];
+
+enum errtype { WARNING, ERROR, FATAL };
+
+void	expandlex(void);
+void	fixlex(void);
+void	setup(int, char **);
+int	gettokens(Tokenrow *, int);
+int	comparetokens(Tokenrow *, Tokenrow *);
+Source	*setsource(char *, int, char *);
+void	unsetsource(void);
+void	puttokens(Tokenrow *);
+void	process(Tokenrow *);
+void	*domalloc(int);
+void	dofree(void *);
+void	error(enum errtype, char *, ...);
+void	flushout(void);
+int	fillbuf(Source *);
+int	trigraph(Source *);
+int	foldline(Source *);
+Nlist	*lookup(Token *, int);
+void	control(Tokenrow *);
+void	dodefine(Tokenrow *);
+void	doadefine(Tokenrow *, int);
+void	doinclude(Tokenrow *);
+void	appendDirToIncludeList( char *dir );
+void	doif(Tokenrow *, enum kwtype);
+void	expand(Tokenrow *, Nlist *);
+void	builtin(Tokenrow *, int);
+int	gatherargs(Tokenrow *, Tokenrow **, int *);
+void	substargs(Nlist *, Tokenrow *, Tokenrow **);
+void	expandrow(Tokenrow *, char *);
+void	maketokenrow(int, Tokenrow *);
+Tokenrow *copytokenrow(Tokenrow *, Tokenrow *);
+Token	*growtokenrow(Tokenrow *);
+Tokenrow *normtokenrow(Tokenrow *);
+void	adjustrow(Tokenrow *, int);
+void	movetokenrow(Tokenrow *, Tokenrow *);
+void	insertrow(Tokenrow *, int, Tokenrow *);
+void	peektokens(Tokenrow *, char *);
+void	doconcat(Tokenrow *);
+Tokenrow *stringify(Tokenrow *);
+int	lookuparg(Nlist *, Token *);
+long	eval(Tokenrow *, int);
+void	genline(void);
+void	setempty(Tokenrow *);
+void	makespace(Tokenrow *);
+char	*outnum(char *, int);
+int	digit(int);
+uchar	*newstring(uchar *, int, int);
+int	checkhideset(int, Nlist *);
+void	prhideset(int);
+int	newhideset(int, Nlist *);
+int	unionhideset(int, int);
+void	iniths(void);
+void	setobjname(char *);
+#define	rowlen(tokrow)	((tokrow)->lp - (tokrow)->bp)
+
+char *basepath( char *fname );
+
+extern	char *outbufp;
+extern	Token	nltoken;
+extern	Source *cursource;
+extern	char *curtime;
+extern	int incdepth;
+extern	int ifdepth;
+extern	int ifsatisfied[NIF];
+extern	int Mflag;
+extern	int skipping;
+extern	int verbose;
+extern	int Cplusplus;
+extern	Nlist *kwdefined;
+extern	Includelist includelist[NINCLUDE];
+extern	char wd[];
+
+#ifndef _WIN32
+#include <unistd.h>
+#else
+#include <io.h>
+#endif
+#include <fcntl.h>
diff --git a/src/tools/lcc/cpp/eval.c b/src/tools/lcc/cpp/eval.c
new file mode 100644
index 0000000..95a9e11
--- /dev/null
+++ b/src/tools/lcc/cpp/eval.c
@@ -0,0 +1,524 @@
+#include <stdlib.h>
+#include <string.h>
+#include "cpp.h"
+
+#define	NSTAK	32
+#define	SGN	0
+#define	UNS	1
+#define	UND	2
+
+#define	UNSMARK	0x1000
+
+struct value {
+	long	val;
+	int	type;
+};
+
+/* conversion types */
+#define	RELAT	1
+#define	ARITH	2
+#define	LOGIC	3
+#define	SPCL	4
+#define	SHIFT	5
+#define	UNARY	6
+
+/* operator priority, arity, and conversion type, indexed by tokentype */
+struct pri {
+	char	pri;
+	char	arity;
+	char	ctype;
+} priority[] = {
+	{ 0, 0, 0 },		/* END */
+	{ 0, 0, 0 },		/* UNCLASS */
+	{ 0, 0, 0 },		/* NAME */
+	{ 0, 0, 0 },		/* NUMBER */
+	{ 0, 0, 0 },		/* STRING */
+	{ 0, 0, 0 },		/* CCON */
+	{ 0, 0, 0 },		/* NL */
+	{ 0, 0, 0 },		/* WS */
+	{ 0, 0, 0 },		/* DSHARP */
+	{ 11, 2, RELAT },	/* EQ */
+	{ 11, 2, RELAT },	/* NEQ */
+	{ 12, 2, RELAT },	/* LEQ */
+	{ 12, 2, RELAT },	/* GEQ */
+	{ 13, 2, SHIFT },	/* LSH */
+	{ 13, 2, SHIFT },	/* RSH */
+	{ 7, 2, LOGIC },	/* LAND */
+	{ 6, 2, LOGIC },	/* LOR */
+	{ 0, 0, 0 },		/* PPLUS */
+	{ 0, 0, 0 },		/* MMINUS */
+	{ 0, 0, 0 },		/* ARROW */
+	{ 0, 0, 0 },		/* SBRA */
+	{ 0, 0, 0 },		/* SKET */
+	{ 3, 0, 0 },		/* LP */
+	{ 3, 0, 0 },		/* RP */
+	{ 0, 0, 0 },		/* DOT */
+	{ 10, 2, ARITH },	/* AND */
+	{ 15, 2, ARITH },	/* STAR */
+	{ 14, 2, ARITH },	/* PLUS */
+	{ 14, 2, ARITH },	/* MINUS */
+	{ 16, 1, UNARY },	/* TILDE */
+	{ 16, 1, UNARY },	/* NOT */
+	{ 15, 2, ARITH },	/* SLASH */
+	{ 15, 2, ARITH },	/* PCT */
+	{ 12, 2, RELAT },	/* LT */
+	{ 12, 2, RELAT },	/* GT */
+	{ 9, 2, ARITH },	/* CIRC */
+	{ 8, 2, ARITH },	/* OR */
+	{ 5, 2, SPCL },		/* QUEST */
+	{ 5, 2, SPCL },		/* COLON */
+	{ 0, 0, 0 },		/* ASGN */
+	{ 4, 2, 0 },		/* COMMA */
+	{ 0, 0, 0 },		/* SHARP */
+	{ 0, 0, 0 },		/* SEMIC */
+	{ 0, 0, 0 },		/* CBRA */
+	{ 0, 0, 0 },		/* CKET */
+	{ 0, 0, 0 },		/* ASPLUS */
+ 	{ 0, 0, 0 },		/* ASMINUS */
+ 	{ 0, 0, 0 },		/* ASSTAR */
+ 	{ 0, 0, 0 },		/* ASSLASH */
+ 	{ 0, 0, 0 },		/* ASPCT */
+ 	{ 0, 0, 0 },		/* ASCIRC */
+ 	{ 0, 0, 0 },		/* ASLSH */
+	{ 0, 0, 0 },		/* ASRSH */
+ 	{ 0, 0, 0 },		/* ASOR */
+ 	{ 0, 0, 0 },		/* ASAND */
+	{ 0, 0, 0 },		/* ELLIPS */
+	{ 0, 0, 0 },		/* DSHARP1 */
+	{ 0, 0, 0 },		/* NAME1 */
+	{ 16, 1, UNARY },	/* DEFINED */
+	{ 16, 0, UNARY },	/* UMINUS */
+};
+
+int	evalop(struct pri);
+struct	value tokval(Token *);
+struct value vals[NSTAK], *vp;
+enum toktype ops[NSTAK], *op;
+
+/*
+ * Evaluate an #if #elif #ifdef #ifndef line.  trp->tp points to the keyword.
+ */
+long
+eval(Tokenrow *trp, int kw)
+{
+	Token *tp;
+	Nlist *np;
+	int ntok, rand;
+
+	trp->tp++;
+	if (kw==KIFDEF || kw==KIFNDEF) {
+		if (trp->lp - trp->bp != 4 || trp->tp->type!=NAME) {
+			error(ERROR, "Syntax error in #ifdef/#ifndef");
+			return 0;
+		}
+		np = lookup(trp->tp, 0);
+		return (kw==KIFDEF) == (np && np->flag&(ISDEFINED|ISMAC));
+	}
+	ntok = trp->tp - trp->bp;
+	kwdefined->val = KDEFINED;	/* activate special meaning of defined */
+	expandrow(trp, "<if>");
+	kwdefined->val = NAME;
+	vp = vals;
+	op = ops;
+	*op++ = END;
+	for (rand=0, tp = trp->bp+ntok; tp < trp->lp; tp++) {
+		switch(tp->type) {
+		case WS:
+		case NL:
+			continue;
+
+		/* nilary */
+		case NAME:
+		case NAME1:
+		case NUMBER:
+		case CCON:
+		case STRING:
+			if (rand)
+				goto syntax;
+			*vp++ = tokval(tp);
+			rand = 1;
+			continue;
+
+		/* unary */
+		case DEFINED:
+		case TILDE:
+		case NOT:
+			if (rand)
+				goto syntax;
+			*op++ = tp->type;
+			continue;
+
+		/* unary-binary */
+		case PLUS: case MINUS: case STAR: case AND:
+			if (rand==0) {
+				if (tp->type==MINUS)
+					*op++ = UMINUS;
+				if (tp->type==STAR || tp->type==AND) {
+					error(ERROR, "Illegal operator * or & in #if/#elsif");
+					return 0;
+				}
+				continue;
+			}
+			/* flow through */
+
+		/* plain binary */
+		case EQ: case NEQ: case LEQ: case GEQ: case LSH: case RSH:
+		case LAND: case LOR: case SLASH: case PCT:
+		case LT: case GT: case CIRC: case OR: case QUEST:
+		case COLON: case COMMA:
+			if (rand==0)
+				goto syntax;
+			if (evalop(priority[tp->type])!=0)
+				return 0;
+			*op++ = tp->type;
+			rand = 0;
+			continue;
+
+		case LP:
+			if (rand)
+				goto syntax;
+			*op++ = LP;
+			continue;
+
+		case RP:
+			if (!rand)
+				goto syntax;
+			if (evalop(priority[RP])!=0)
+				return 0;
+			if (op<=ops || op[-1]!=LP) {
+				goto syntax;
+			}
+			op--;
+			continue;
+
+		default:
+			error(ERROR,"Bad operator (%t) in #if/#elsif", tp);
+			return 0;
+		}
+	}
+	if (rand==0)
+		goto syntax;
+	if (evalop(priority[END])!=0)
+		return 0;
+	if (op!=&ops[1] || vp!=&vals[1]) {
+		error(ERROR, "Botch in #if/#elsif");
+		return 0;
+	}
+	if (vals[0].type==UND)
+		error(ERROR, "Undefined expression value");
+	return vals[0].val;
+syntax:
+	error(ERROR, "Syntax error in #if/#elsif");
+	return 0;
+}
+
+int
+evalop(struct pri pri)
+{
+	struct value v1, v2;
+	long rv1, rv2;
+	int rtype, oper;
+
+	/* prevent compiler whining. */
+	v1.val = v2.val = 0;
+	v1.type = v2.type = 0;
+
+	rv2=0;
+	rtype=0;
+	while (pri.pri < priority[op[-1]].pri) {
+		oper = *--op;
+		if (priority[oper].arity==2) {
+			v2 = *--vp;
+			rv2 = v2.val;
+		}
+		v1 = *--vp;
+		rv1 = v1.val;
+/*lint -e574 -e644 */
+		switch (priority[oper].ctype) {
+		case 0:
+		default:
+			error(WARNING, "Syntax error in #if/#endif");
+			return 1;
+		case ARITH:
+		case RELAT:
+			if (v1.type==UNS || v2.type==UNS)
+				rtype = UNS;
+			else
+				rtype = SGN;
+			if (v1.type==UND || v2.type==UND)
+				rtype = UND;
+			if (priority[oper].ctype==RELAT && rtype==UNS) {
+				oper |= UNSMARK;
+				rtype = SGN;
+			}
+			break;
+		case SHIFT:
+			if (v1.type==UND || v2.type==UND)
+				rtype = UND;
+			else
+				rtype = v1.type;
+			if (rtype==UNS)
+				oper |= UNSMARK;
+			break;
+		case UNARY:
+			rtype = v1.type;
+			break;
+		case LOGIC:
+		case SPCL:
+			break;
+		}
+		switch (oper) {
+		case EQ: case EQ|UNSMARK:
+			rv1 = rv1==rv2; break;
+		case NEQ: case NEQ|UNSMARK:
+			rv1 = rv1!=rv2; break;
+		case LEQ:
+			rv1 = rv1<=rv2; break;
+		case GEQ:
+			rv1 = rv1>=rv2; break;
+		case LT:
+			rv1 = rv1<rv2; break;
+		case GT:
+			rv1 = rv1>rv2; break;
+		case LEQ|UNSMARK:
+			rv1 = (unsigned long)rv1<=rv2; break;
+		case GEQ|UNSMARK:
+			rv1 = (unsigned long)rv1>=rv2; break;
+		case LT|UNSMARK:
+			rv1 = (unsigned long)rv1<rv2; break;
+		case GT|UNSMARK:
+			rv1 = (unsigned long)rv1>rv2; break;
+		case LSH:
+			rv1 <<= rv2; break;
+		case LSH|UNSMARK:
+			rv1 = (unsigned long)rv1<<rv2; break;
+		case RSH:
+			rv1 >>= rv2; break;
+		case RSH|UNSMARK:
+			rv1 = (unsigned long)rv1>>rv2; break;
+		case LAND:
+			rtype = UND;
+			if (v1.type==UND)
+				break;
+			if (rv1!=0) {
+				if (v2.type==UND)
+					break;
+				rv1 = rv2!=0;
+			} else
+				rv1 = 0;
+			rtype = SGN;
+			break;
+		case LOR:
+			rtype = UND;
+			if (v1.type==UND)
+				break;
+			if (rv1==0) {
+				if (v2.type==UND)
+					break;
+				rv1 = rv2!=0;
+			} else
+				rv1 = 1;
+			rtype = SGN;
+			break;
+		case AND:
+			rv1 &= rv2; break;
+		case STAR:
+			rv1 *= rv2; break;
+		case PLUS:
+			rv1 += rv2; break;
+		case MINUS:
+			rv1 -= rv2; break;
+		case UMINUS:
+			if (v1.type==UND)
+				rtype = UND;
+			rv1 = -rv1; break;
+		case OR:
+			rv1 |= rv2; break;
+		case CIRC:
+			rv1 ^= rv2; break;
+		case TILDE:
+			rv1 = ~rv1; break;
+		case NOT:
+			rv1 = !rv1; if (rtype!=UND) rtype = SGN; break;
+		case SLASH:
+			if (rv2==0) {
+				rtype = UND;
+				break;
+			}
+			if (rtype==UNS)
+				rv1 /= (unsigned long)rv2;
+			else
+				rv1 /= rv2;
+			break;
+		case PCT:
+			if (rv2==0) {
+				rtype = UND;
+				break;
+			}
+			if (rtype==UNS)
+				rv1 %= (unsigned long)rv2;
+			else
+				rv1 %= rv2;
+			break;
+		case COLON:
+			if (op[-1] != QUEST)
+				error(ERROR, "Bad ?: in #if/endif");
+			else {
+				op--;
+				if ((--vp)->val==0)
+					v1 = v2;
+				rtype = v1.type;
+				rv1 = v1.val;
+			}
+			break;
+		case DEFINED:
+			break;
+		default:
+			error(ERROR, "Eval botch (unknown operator)");
+			return 1;
+		}
+/*lint +e574 +e644 */
+		v1.val = rv1;
+		v1.type = rtype;
+		*vp++ = v1;
+	}
+	return 0;
+}
+
+struct value
+tokval(Token *tp)
+{
+	struct value v;
+	Nlist *np;
+	int i, base, c;
+	unsigned long n;
+	uchar *p;
+
+	v.type = SGN;
+	v.val = 0;
+	switch (tp->type) {
+
+	case NAME:
+		v.val = 0;
+		break;
+
+	case NAME1:
+		if ((np = lookup(tp, 0)) != NULL && np->flag&(ISDEFINED|ISMAC))
+			v.val = 1;
+		break;
+
+	case NUMBER:
+		n = 0;
+		base = 10;
+		p = tp->t;
+		c = p[tp->len];
+		p[tp->len] = '\0';
+		if (*p=='0') {
+			base = 8;
+			if (p[1]=='x' || p[1]=='X') {
+				base = 16;
+				p++;
+			}
+			p++;
+		}
+		for (;; p++) {
+			if ((i = digit(*p)) < 0)
+				break;
+			if (i>=base)
+				error(WARNING,
+				  "Bad digit in number %t", tp);
+			n *= base;
+			n += i;
+		}
+		if (n>=0x80000000 && base!=10)
+			v.type = UNS;
+		for (; *p; p++) {
+			if (*p=='u' || *p=='U')
+				v.type = UNS;
+			else if (*p=='l' || *p=='L')
+				;
+			else {
+				error(ERROR,
+				  "Bad number %t in #if/#elsif", tp);
+				break;
+			}
+		}
+		v.val = n;
+		tp->t[tp->len] = c;
+		break;
+
+	case CCON:
+		n = 0;
+		p = tp->t;
+		if (*p=='L') {
+			p += 1;
+			error(WARNING, "Wide char constant value undefined");
+		}
+		p += 1;
+		if (*p=='\\') {
+			p += 1;
+			if ((i = digit(*p))>=0 && i<=7) {
+				n = i;
+				p += 1;
+				if ((i = digit(*p))>=0 && i<=7) {
+					p += 1;
+					n <<= 3;
+					n += i;
+					if ((i = digit(*p))>=0 && i<=7) {
+						p += 1;
+						n <<= 3;
+						n += i;
+					}
+				}
+			} else if (*p=='x') {
+				p += 1;
+				while ((i = digit(*p))>=0 && i<=15) {
+					p += 1;
+					n <<= 4;
+					n += i;
+				}
+			} else {
+				static char cvcon[]
+				  = "b\bf\fn\nr\rt\tv\v''\"\"??\\\\";
+				for (i=0; i<sizeof(cvcon); i+=2) {
+					if (*p == cvcon[i]) {
+						n = cvcon[i+1];
+						break;
+					}
+				}
+				p += 1;
+				if (i>=sizeof(cvcon))
+					error(WARNING,
+					 "Undefined escape in character constant");
+			}
+		} else if (*p=='\'')
+			error(ERROR, "Empty character constant");
+		else
+			n = *p++;
+		if (*p!='\'')
+			error(WARNING, "Multibyte character constant undefined");
+		else if (n>127)
+			error(WARNING, "Character constant taken as not signed");
+		v.val = n;
+		break;
+
+	case STRING:
+		error(ERROR, "String in #if/#elsif");
+		break;
+	}
+	return v;
+}
+
+int
+digit(int i)
+{
+	if ('0'<=i && i<='9')
+		i -= '0';
+	else if ('a'<=i && i<='f')
+		i -= 'a'-10;
+	else if ('A'<=i && i<='F')
+		i -= 'A'-10;
+	else
+		i = -1;
+	return i;
+}
diff --git a/src/tools/lcc/cpp/getopt.c b/src/tools/lcc/cpp/getopt.c
new file mode 100644
index 0000000..c4d1af7
--- /dev/null
+++ b/src/tools/lcc/cpp/getopt.c
@@ -0,0 +1,53 @@
+#include	<stdio.h>
+#include	<string.h>
+#define EPR                 fprintf(stderr,
+#define ERR(str, chr)       if(opterr){EPR "%s%c\n", str, chr);}
+int     opterr = 1;
+int     optind = 1;
+int	optopt;
+char    *optarg;
+
+int
+lcc_getopt (int argc, char *const argv[], const char *opts)
+{
+	static int sp = 1;
+	int c;
+	char *cp;
+
+	if (sp == 1) {
+		if (optind >= argc ||
+		   argv[optind][0] != '-' || argv[optind][1] == '\0')
+			return -1;
+		else if (strcmp(argv[optind], "--") == 0) {
+			optind++;
+			return -1;
+		}
+	}
+	optopt = c = argv[optind][sp];
+	if (c == ':' || (cp=strchr(opts, c)) == 0) {
+		ERR (": illegal option -- ", c);
+		if (argv[optind][++sp] == '\0') {
+			optind++;
+			sp = 1;
+		}
+		return '?';
+	}
+	if (*++cp == ':') {
+		if (argv[optind][sp+1] != '\0')
+			optarg = &argv[optind++][sp+1];
+		else if (++optind >= argc) {
+			ERR (": option requires an argument -- ", c);
+			sp = 1;
+			return '?';
+		} else
+			optarg = argv[optind++];
+		sp = 1;
+	} else {
+		if (argv[optind][++sp] == '\0') {
+			sp = 1;
+			optind++;
+		}
+		optarg = 0;
+	}
+	return c;
+}
diff --git a/src/tools/lcc/cpp/hideset.c b/src/tools/lcc/cpp/hideset.c
new file mode 100644
index 0000000..bd2540d
--- /dev/null
+++ b/src/tools/lcc/cpp/hideset.c
@@ -0,0 +1,112 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cpp.h"
+
+/*
+ * A hideset is a null-terminated array of Nlist pointers.
+ * They are referred to by indices in the hidesets array.
+ * Hideset 0 is empty.
+ */
+
+#define	HSSIZ	32
+typedef	Nlist	**Hideset;
+Hideset	*hidesets;
+int	nhidesets = 0;
+int	maxhidesets = 3;
+int	inserths(Hideset, Hideset, Nlist *);
+
+/*
+ * Test for membership in a hideset
+ */
+int
+checkhideset(int hs, Nlist *np)
+{
+	Hideset hsp;
+
+	if (hs>=nhidesets)
+		abort();
+	for (hsp = hidesets[hs]; *hsp; hsp++) {
+		if (*hsp == np)
+			return 1;
+	}
+	return 0;
+}
+
+/*
+ * Return the (possibly new) hideset obtained by adding np to hs.
+ */
+int
+newhideset(int hs, Nlist *np)
+{
+	int i, len;
+	Nlist *nhs[HSSIZ+3];
+	Hideset hs1, hs2;
+
+	len = inserths(nhs, hidesets[hs], np);
+	for (i=0; i<nhidesets; i++) {
+		for (hs1=nhs, hs2=hidesets[i]; *hs1==*hs2; hs1++, hs2++)
+			if (*hs1 == NULL)
+				return i;
+	}
+	if (len>=HSSIZ)
+		return hs;
+	if (nhidesets >= maxhidesets) {
+		maxhidesets = 3*maxhidesets/2+1;
+		hidesets = (Hideset *)realloc(hidesets, (sizeof (Hideset *))*maxhidesets);
+		if (hidesets == NULL)
+			error(FATAL, "Out of memory from realloc");
+	}
+	hs1 = (Hideset)domalloc(len*sizeof(Hideset));
+	memmove(hs1, nhs, len*sizeof(Hideset));
+	hidesets[nhidesets] = hs1;
+	return nhidesets++;
+}
+
+int
+inserths(Hideset dhs, Hideset shs, Nlist *np)
+{
+	Hideset odhs = dhs;
+
+	while (*shs && *shs < np)
+		*dhs++ = *shs++;
+	if (*shs != np)
+		*dhs++ = np;
+	do {
+		*dhs++ = *shs;
+	} while (*shs++);
+	return dhs - odhs;
+}
+
+/*
+ * Hideset union
+ */
+int
+unionhideset(int hs1, int hs2)
+{
+	Hideset hp;
+
+	for (hp = hidesets[hs2]; *hp; hp++)
+		hs1 = newhideset(hs1, *hp);
+	return hs1;
+}
+
+void
+iniths(void)
+{
+	hidesets = (Hideset *)domalloc(maxhidesets*sizeof(Hideset *));
+	hidesets[0] = (Hideset)domalloc(sizeof(Hideset));
+	*hidesets[0] = NULL;
+	nhidesets++;
+}
+
+void
+prhideset(int hs)
+{
+	Hideset np;
+
+	for (np = hidesets[hs]; *np; np++) {
+		fprintf(stderr, (char*)(*np)->name, (*np)->len);
+		fprintf(stderr, " ");
+	}
+}
diff --git a/src/tools/lcc/cpp/include.c b/src/tools/lcc/cpp/include.c
new file mode 100644
index 0000000..5ecd8b3
--- /dev/null
+++ b/src/tools/lcc/cpp/include.c
@@ -0,0 +1,153 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cpp.h"
+
+Includelist	includelist[NINCLUDE];
+
+extern char	*objname;
+
+void appendDirToIncludeList( char *dir )
+{
+	int i;
+	char *fqdir;
+
+	fqdir = (char *)newstring( (uchar *)includelist[NINCLUDE-1].file, 256, 0 );
+	strcat( fqdir, "/" );
+	strcat( fqdir, dir );
+
+	//avoid adding it more than once
+	for (i=NINCLUDE-2; i>=0; i--) {
+		if (includelist[i].file &&
+				!strcmp (includelist[i].file, fqdir)) {
+			return;
+		}
+	}
+
+	for (i=NINCLUDE-2; i>=0; i--) {
+		if (includelist[i].file==NULL) {
+			includelist[i].always = 1;
+			includelist[i].file = fqdir;
+			break;
+		}
+	}
+	if (i<0)
+		error(FATAL, "Too many -I directives");
+}
+
+void
+doinclude(Tokenrow *trp)
+{
+	char fname[256], iname[256];
+	Includelist *ip;
+	int angled, len, fd, i;
+
+	trp->tp += 1;
+	if (trp->tp>=trp->lp)
+		goto syntax;
+	if (trp->tp->type!=STRING && trp->tp->type!=LT) {
+		len = trp->tp - trp->bp;
+		expandrow(trp, "<include>");
+		trp->tp = trp->bp+len;
+	}
+	if (trp->tp->type==STRING) {
+		len = trp->tp->len-2;
+		if (len > sizeof(fname) - 1)
+			len = sizeof(fname) - 1;
+		strncpy(fname, (char*)trp->tp->t+1, len);
+		angled = 0;
+	} else if (trp->tp->type==LT) {
+		len = 0;
+		trp->tp++;
+		while (trp->tp->type!=GT) {
+			if (trp->tp>trp->lp || len+trp->tp->len+2 >= sizeof(fname))
+				goto syntax;
+			strncpy(fname+len, (char*)trp->tp->t, trp->tp->len);
+			len += trp->tp->len;
+			trp->tp++;
+		}
+		angled = 1;
+	} else
+		goto syntax;
+	trp->tp += 2;
+	if (trp->tp < trp->lp || len==0)
+		goto syntax;
+	fname[len] = '\0';
+
+	appendDirToIncludeList( basepath( fname ) );
+
+	if (fname[0]=='/') {
+		fd = open(fname, 0);
+		strcpy(iname, fname);
+	} else for (fd = -1,i=NINCLUDE-1; i>=0; i--) {
+		ip = &includelist[i];
+		if (ip->file==NULL || ip->deleted || (angled && ip->always==0))
+			continue;
+		if (strlen(fname)+strlen(ip->file)+2 > sizeof(iname))
+			continue;
+		strcpy(iname, ip->file);
+		strcat(iname, "/");
+		strcat(iname, fname);
+		if ((fd = open(iname, 0)) >= 0)
+			break;
+	}
+	if ( Mflag>1 || (!angled&&Mflag==1) ) {
+		write(1,objname,strlen(objname));
+		write(1,iname,strlen(iname));
+		write(1,"\n",1);
+	}
+	if (fd >= 0) {
+		if (++incdepth > 10)
+			error(FATAL, "#include too deeply nested");
+		setsource((char*)newstring((uchar*)iname, strlen(iname), 0), fd, NULL);
+		genline();
+	} else {
+		trp->tp = trp->bp+2;
+		error(ERROR, "Could not find include file %r", trp);
+	}
+	return;
+syntax:
+	error(ERROR, "Syntax error in #include");
+}
+
+/*
+ * Generate a line directive for cursource
+ */
+void
+genline(void)
+{
+	static Token ta = { UNCLASS };
+	static Tokenrow tr = { &ta, &ta, &ta+1, 1 };
+	uchar *p;
+
+	ta.t = p = (uchar*)outbufp;
+	strcpy((char*)p, "#line ");
+	p += sizeof("#line ")-1;
+	p = (uchar*)outnum((char*)p, cursource->line);
+	*p++ = ' '; *p++ = '"';
+	if (cursource->filename[0]!='/' && wd[0]) {
+		strcpy((char*)p, wd);
+		p += strlen(wd);
+		*p++ = '/';
+	}
+	strcpy((char*)p, cursource->filename);
+	p += strlen((char*)p);
+	*p++ = '"'; *p++ = '\n';
+	ta.len = (char*)p-outbufp;
+	outbufp = (char*)p;
+	tr.tp = tr.bp;
+	puttokens(&tr);
+}
+
+void
+setobjname(char *f)
+{
+	int n = strlen(f);
+	objname = (char*)domalloc(n+5);
+	strcpy(objname,f);
+	if(objname[n-2]=='.'){
+		strcpy(objname+n-1,"$O: ");
+	}else{
+		strcpy(objname+n,"$O: ");
+	}
+}
diff --git a/src/tools/lcc/cpp/lex.c b/src/tools/lcc/cpp/lex.c
new file mode 100644
index 0000000..8030354
--- /dev/null
+++ b/src/tools/lcc/cpp/lex.c
@@ -0,0 +1,580 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cpp.h"
+
+/*
+ * lexical FSM encoding
+ *   when in state state, and one of the characters
+ *   in ch arrives, enter nextstate.
+ *   States >= S_SELF are either final, or at least require special action.
+ *   In 'fsm' there is a line for each state X charset X nextstate.
+ *   List chars that overwrite previous entries later (e.g. C_ALPH
+ *   can be overridden by '_' by a later entry; and C_XX is the
+ *   the universal set, and should always be first.
+ *   States above S_SELF are represented in the big table as negative values.
+ *   S_SELF and S_SELFB encode the resulting token type in the upper bits.
+ *   These actions differ in that S_SELF doesn't have a lookahead char,
+ *   S_SELFB does.
+ *
+ *   The encoding is blown out into a big table for time-efficiency.
+ *   Entries have
+ *      nextstate: 6 bits; ?\ marker: 1 bit; tokentype: 9 bits.
+ */
+
+#define	MAXSTATE 32
+#define	ACT(tok,act)	((tok<<7)+act)
+#define	QBSBIT	0100
+#define	GETACT(st)	(st>>7)&0x1ff
+
+/* character classes */
+#define	C_WS	1
+#define	C_ALPH	2
+#define	C_NUM	3
+#define	C_EOF	4
+#define	C_XX	5
+
+enum state {
+	START=0, NUM1, NUM2, NUM3, ID1, ST1, ST2, ST3, COM1, COM2, COM3, COM4,
+	CC1, CC2, WS1, PLUS1, MINUS1, STAR1, SLASH1, PCT1, SHARP1,
+	CIRC1, GT1, GT2, LT1, LT2, OR1, AND1, ASG1, NOT1, DOTS1,
+	S_SELF=MAXSTATE, S_SELFB, S_EOF, S_NL, S_EOFSTR,
+	S_STNL, S_COMNL, S_EOFCOM, S_COMMENT, S_EOB, S_WS, S_NAME
+};
+
+int	tottok;
+int	tokkind[256];
+struct	fsm {
+	int	state;		/* if in this state */
+	uchar	ch[4];		/* and see one of these characters */
+	int	nextstate;	/* enter this state if +ve */
+};
+
+/*const*/ struct fsm fsm[] = {
+	/* start state */
+	{START,	{ C_XX },	ACT(UNCLASS,S_SELF)},
+	{START,	{ ' ', '\t', '\v' },	WS1},
+	{START,	{ C_NUM },	NUM1},
+	{START,	{ '.' },	NUM3},
+	{START,	{ C_ALPH },	ID1},
+	{START,	{ 'L' },	ST1},
+	{START,	{ '"' },	ST2},
+	{START,	{ '\'' },	CC1},
+	{START,	{ '/' },	COM1},
+	{START,	{ EOFC },	S_EOF},
+	{START,	{ '\n' },	S_NL},
+	{START,	{ '-' },	MINUS1},
+	{START,	{ '+' },	PLUS1},
+	{START,	{ '<' },	LT1},
+	{START,	{ '>' },	GT1},
+	{START,	{ '=' },	ASG1},
+	{START,	{ '!' },	NOT1},
+	{START,	{ '&' },	AND1},
+	{START,	{ '|' },	OR1},
+	{START,	{ '#' },	SHARP1},
+	{START,	{ '%' },	PCT1},
+	{START,	{ '[' },	ACT(SBRA,S_SELF)},
+	{START,	{ ']' },	ACT(SKET,S_SELF)},
+	{START,	{ '(' },	ACT(LP,S_SELF)},
+	{START,	{ ')' },	ACT(RP,S_SELF)},
+	{START,	{ '*' },	STAR1},
+	{START,	{ ',' },	ACT(COMMA,S_SELF)},
+	{START,	{ '?' },	ACT(QUEST,S_SELF)},
+	{START,	{ ':' },	ACT(COLON,S_SELF)},
+	{START,	{ ';' },	ACT(SEMIC,S_SELF)},
+	{START,	{ '{' },	ACT(CBRA,S_SELF)},
+	{START,	{ '}' },	ACT(CKET,S_SELF)},
+	{START,	{ '~' },	ACT(TILDE,S_SELF)},
+	{START,	{ '^' },	CIRC1},
+
+	/* saw a digit */
+	{NUM1,	{ C_XX },	ACT(NUMBER,S_SELFB)},
+	{NUM1,	{ C_NUM, C_ALPH, '.' },	NUM1},
+	{NUM1,	{ 'E', 'e' },	NUM2},
+	{NUM1,	{ '_' },	ACT(NUMBER,S_SELFB)},
+
+	/* saw possible start of exponent, digits-e */
+	{NUM2,	{ C_XX },	ACT(NUMBER,S_SELFB)},
+	{NUM2,	{ '+', '-' },	NUM1},
+	{NUM2,	{ C_NUM, C_ALPH },	NUM1},
+	{NUM2,	{ '_' },	ACT(NUMBER,S_SELFB)},
+
+	/* saw a '.', which could be a number or an operator */
+	{NUM3,	{ C_XX },	ACT(DOT,S_SELFB)},
+	{NUM3,	{ '.' },	DOTS1},
+	{NUM3,	{ C_NUM },	NUM1},
+
+	{DOTS1,	{ C_XX },	ACT(UNCLASS, S_SELFB)},
+	{DOTS1,	{ C_NUM },	NUM1},
+	{DOTS1,	{ '.' },	ACT(ELLIPS, S_SELF)},
+
+	/* saw a letter or _ */
+	{ID1,	{ C_XX },	ACT(NAME,S_NAME)},
+	{ID1,	{ C_ALPH, C_NUM },	ID1},
+
+	/* saw L (start of wide string?) */
+	{ST1,	{ C_XX },	ACT(NAME,S_NAME)},
+	{ST1,	{ C_ALPH, C_NUM },	ID1},
+	{ST1,	{ '"' },	ST2},
+	{ST1,	{ '\'' },	CC1},
+
+	/* saw " beginning string */
+	{ST2,	{ C_XX },	ST2},
+	{ST2,	{ '"' },	ACT(STRING, S_SELF)},
+	{ST2,	{ '\\' },	ST3},
+	{ST2,	{ '\n' },	S_STNL},
+	{ST2,	{ EOFC },	S_EOFSTR},
+
+	/* saw \ in string */
+	{ST3,	{ C_XX },	ST2},
+	{ST3,	{ '\n' },	S_STNL},
+	{ST3,	{ EOFC },	S_EOFSTR},
+
+	/* saw ' beginning character const */
+	{CC1,	{ C_XX },	CC1},
+	{CC1,	{ '\'' },	ACT(CCON, S_SELF)},
+	{CC1,	{ '\\' },	CC2},
+	{CC1,	{ '\n' },	S_STNL},
+	{CC1,	{ EOFC },	S_EOFSTR},
+
+	/* saw \ in ccon */
+	{CC2,	{ C_XX },	CC1},
+	{CC2,	{ '\n' },	S_STNL},
+	{CC2,	{ EOFC },	S_EOFSTR},
+
+	/* saw /, perhaps start of comment */
+	{COM1,	{ C_XX },	ACT(SLASH, S_SELFB)},
+	{COM1,	{ '=' },	ACT(ASSLASH, S_SELF)},
+	{COM1,	{ '*' },	COM2},
+	{COM1,	{ '/' },	COM4},
+
+	/* saw / then *, start of comment */
+	{COM2,	{ C_XX },	COM2},
+	{COM2,	{ '\n' },	S_COMNL},
+	{COM2,	{ '*' },	COM3},
+	{COM2,	{ EOFC },	S_EOFCOM},
+
+	/* saw the * possibly ending a comment */
+	{COM3,	{ C_XX },	COM2},
+	{COM3,	{ '\n' },	S_COMNL},
+	{COM3,	{ '*' },	COM3},
+	{COM3,	{ '/' },	S_COMMENT},
+
+	/* // comment */
+	{COM4,	{ C_XX },	COM4},
+	{COM4,	{ '\n' },	S_NL},
+	{COM4,	{ EOFC },	S_EOFCOM},
+
+	/* saw white space, eat it up */
+	{WS1,	{ C_XX },	S_WS},
+	{WS1,	{ ' ', '\t', '\v' },	WS1},
+
+	/* saw -, check --, -=, -> */
+	{MINUS1,	{ C_XX },	ACT(MINUS, S_SELFB)},
+	{MINUS1,	{ '-' },	ACT(MMINUS, S_SELF)},
+	{MINUS1,	{ '=' },	ACT(ASMINUS,S_SELF)},
+	{MINUS1,	{ '>' },	ACT(ARROW,S_SELF)},
+
+	/* saw +, check ++, += */
+	{PLUS1,	{ C_XX },	ACT(PLUS, S_SELFB)},
+	{PLUS1,	{ '+' },	ACT(PPLUS, S_SELF)},
+	{PLUS1,	{ '=' },	ACT(ASPLUS, S_SELF)},
+
+	/* saw <, check <<, <<=, <= */
+	{LT1,	{ C_XX },	ACT(LT, S_SELFB)},
+	{LT1,	{ '<' },	LT2},
+	{LT1,	{ '=' },	ACT(LEQ, S_SELF)},
+	{LT2,	{ C_XX },	ACT(LSH, S_SELFB)},
+	{LT2,	{ '=' },	ACT(ASLSH, S_SELF)},
+
+	/* saw >, check >>, >>=, >= */
+	{GT1,	{ C_XX },	ACT(GT, S_SELFB)},
+	{GT1,	{ '>' },	GT2},
+	{GT1,	{ '=' },	ACT(GEQ, S_SELF)},
+	{GT2,	{ C_XX },	ACT(RSH, S_SELFB)},
+	{GT2,	{ '=' },	ACT(ASRSH, S_SELF)},
+
+	/* = */
+	{ASG1,	{ C_XX },	ACT(ASGN, S_SELFB)},
+	{ASG1,	{ '=' },	ACT(EQ, S_SELF)},
+
+	/* ! */
+	{NOT1,	{ C_XX },	ACT(NOT, S_SELFB)},
+	{NOT1,	{ '=' },	ACT(NEQ, S_SELF)},
+
+	/* & */
+	{AND1,	{ C_XX },	ACT(AND, S_SELFB)},
+	{AND1,	{ '&' },	ACT(LAND, S_SELF)},
+	{AND1,	{ '=' },	ACT(ASAND, S_SELF)},
+
+	/* | */
+	{OR1,	{ C_XX },	ACT(OR, S_SELFB)},
+	{OR1,	{ '|' },	ACT(LOR, S_SELF)},
+	{OR1,	{ '=' },	ACT(ASOR, S_SELF)},
+
+	/* # */
+	{SHARP1,	{ C_XX },	ACT(SHARP, S_SELFB)},
+	{SHARP1,	{ '#' },	ACT(DSHARP, S_SELF)},
+
+	/* % */
+	{PCT1,	{ C_XX },	ACT(PCT, S_SELFB)},
+	{PCT1,	{ '=' },	ACT(ASPCT, S_SELF)},
+
+	/* * */
+	{STAR1,	{ C_XX },	ACT(STAR, S_SELFB)},
+	{STAR1,	{ '=' },	ACT(ASSTAR, S_SELF)},
+
+	/* ^ */
+	{CIRC1,	{ C_XX },	ACT(CIRC, S_SELFB)},
+	{CIRC1,	{ '=' },	ACT(ASCIRC, S_SELF)},
+
+	{-1}
+};
+
+/* first index is char, second is state */
+/* increase #states to power of 2 to encourage use of shift */
+short	bigfsm[256][MAXSTATE];
+
+void
+expandlex(void)
+{
+	/*const*/ struct fsm *fp;
+	int i, j, nstate;
+
+	for (fp = fsm; fp->state>=0; fp++) {
+		for (i=0; fp->ch[i]; i++) {
+			nstate = fp->nextstate;
+			if (nstate >= S_SELF)
+				nstate = ~nstate;
+			switch (fp->ch[i]) {
+
+			case C_XX:		/* random characters */
+				for (j=0; j<256; j++)
+					bigfsm[j][fp->state] = nstate;
+				continue;
+			case C_ALPH:
+				for (j=0; j<=256; j++)
+					if (('a'<=j&&j<='z') || ('A'<=j&&j<='Z')
+					  || j=='_')
+						bigfsm[j][fp->state] = nstate;
+				continue;
+			case C_NUM:
+				for (j='0'; j<='9'; j++)
+					bigfsm[j][fp->state] = nstate;
+				continue;
+			default:
+				bigfsm[fp->ch[i]][fp->state] = nstate;
+			}
+		}
+	}
+	/* install special cases for ? (trigraphs),  \ (splicing), runes, and EOB */
+	for (i=0; i<MAXSTATE; i++) {
+		for (j=0; j<0xFF; j++)
+			if (j=='?' || j=='\\') {
+				if (bigfsm[j][i]>0)
+					bigfsm[j][i] = ~bigfsm[j][i];
+				bigfsm[j][i] &= ~QBSBIT;
+			}
+		bigfsm[EOB][i] = ~S_EOB;
+		if (bigfsm[EOFC][i]>=0)
+			bigfsm[EOFC][i] = ~S_EOF;
+	}
+}
+
+void
+fixlex(void)
+{
+	/* do C++ comments? */
+	if (Cplusplus==0)
+		bigfsm['/'][COM1] = bigfsm['x'][COM1];
+}
+
+/*
+ * fill in a row of tokens from input, terminated by NL or END
+ * First token is put at trp->lp.
+ * Reset is non-zero when the input buffer can be "rewound."
+ * The value is a flag indicating that possible macros have
+ * been seen in the row.
+ */
+int
+gettokens(Tokenrow *trp, int reset)
+{
+	register int c, state, oldstate;
+	register uchar *ip;
+	register Token *tp, *maxp;
+	int runelen;
+	Source *s = cursource;
+	int nmac = 0;
+
+	tp = trp->lp;
+	ip = s->inp;
+	if (reset) {
+		s->lineinc = 0;
+		if (ip>=s->inl) {		/* nothing in buffer */
+			s->inl = s->inb;
+			fillbuf(s);
+			ip = s->inp = s->inb;
+		} else if (ip >= s->inb+(3*INS/4)) {
+			memmove(s->inb, ip, 4+s->inl-ip);
+			s->inl = s->inb+(s->inl-ip);
+			ip = s->inp = s->inb;
+		}
+	}
+	maxp = &trp->bp[trp->max];
+	runelen = 1;
+	for (;;) {
+	   continue2:
+		if (tp>=maxp) {
+			trp->lp = tp;
+			tp = growtokenrow(trp);
+			maxp = &trp->bp[trp->max];
+		}
+		tp->type = UNCLASS;
+		tp->hideset = 0;
+		tp->t = ip;
+		tp->wslen = 0;
+		tp->flag = 0;
+		state = START;
+		for (;;) {
+			oldstate = state;
+			c = *ip;
+			if ((state = bigfsm[c][state]) >= 0) {
+				ip += runelen;
+				runelen = 1;
+				continue;
+			}
+			state = ~state;
+		reswitch:
+			switch (state&0177) {
+			case S_SELF:
+				ip += runelen;
+				runelen = 1;
+			case S_SELFB:
+				tp->type = GETACT(state);
+				tp->len = ip - tp->t;
+				tp++;
+				goto continue2;
+
+			case S_NAME:	/* like S_SELFB but with nmac check */
+				tp->type = NAME;
+				tp->len = ip - tp->t;
+				nmac |= quicklook(tp->t[0], tp->len>1?tp->t[1]:0);
+				tp++;
+				goto continue2;
+
+			case S_WS:
+				tp->wslen = ip - tp->t;
+				tp->t = ip;
+				state = START;
+				continue;
+
+			default:
+				if ((state&QBSBIT)==0) {
+					ip += runelen;
+					runelen = 1;
+					continue;
+				}
+				state &= ~QBSBIT;
+				s->inp = ip;
+				if (c=='?') { 	/* check trigraph */
+					if (trigraph(s)) {
+						state = oldstate;
+						continue;
+					}
+					goto reswitch;
+				}
+				if (c=='\\') { /* line-folding */
+					if (foldline(s)) {
+						s->lineinc++;
+						state = oldstate;
+						continue;
+					}
+					goto reswitch;
+				}
+				error(WARNING, "Lexical botch in cpp");
+				ip += runelen;
+				runelen = 1;
+				continue;
+
+			case S_EOB:
+				s->inp = ip;
+				fillbuf(cursource);
+				state = oldstate;
+				continue;
+
+			case S_EOF:
+				tp->type = END;
+				tp->len = 0;
+				s->inp = ip;
+				if (tp!=trp->bp && (tp-1)->type!=NL && cursource->fd!=-1)
+					error(WARNING,"No newline at end of file");
+				trp->lp = tp+1;
+				return nmac;
+
+			case S_STNL:
+				error(ERROR, "Unterminated string or char const");
+			case S_NL:
+				tp->t = ip;
+				tp->type = NL;
+				tp->len = 1;
+				tp->wslen = 0;
+				s->lineinc++;
+				s->inp = ip+1;
+				trp->lp = tp+1;
+				return nmac;
+
+			case S_EOFSTR:
+				error(FATAL, "EOF in string or char constant");
+				break;
+
+			case S_COMNL:
+				s->lineinc++;
+				state = COM2;
+				ip += runelen;
+				runelen = 1;
+				if (ip >= s->inb+(7*INS/8)) { /* very long comment */
+					memmove(tp->t, ip, 4+s->inl-ip);
+					s->inl -= ip-tp->t;
+					ip = tp->t+1;
+				}
+				continue;
+
+			case S_EOFCOM:
+				error(WARNING, "EOF inside comment");
+				--ip;
+			case S_COMMENT:
+				++ip;
+				tp->t = ip;
+				tp->t[-1] = ' ';
+				tp->wslen = 1;
+				state = START;
+				continue;
+			}
+			break;
+		}
+		ip += runelen;
+		runelen = 1;
+		tp->len = ip - tp->t;
+		tp++;
+	}
+}
+
+/* have seen ?; handle the trigraph it starts (if any) else 0 */
+int
+trigraph(Source *s)
+{
+	int c;
+
+	while (s->inp+2 >= s->inl && fillbuf(s)!=EOF)
+		;
+	if (s->inp[1]!='?')
+		return 0;
+	c = 0;
+	switch(s->inp[2]) {
+	case '=':
+		c = '#'; break;
+	case '(':
+		c = '['; break;
+	case '/':
+		c = '\\'; break;
+	case ')':
+		c = ']'; break;
+	case '\'':
+		c = '^'; break;
+	case '<':
+		c = '{'; break;
+	case '!':
+		c = '|'; break;
+	case '>':
+		c = '}'; break;
+	case '-':
+		c = '~'; break;
+	}
+	if (c) {
+		*s->inp = c;
+		memmove(s->inp+1, s->inp+3, s->inl-s->inp+2);
+		s->inl -= 2;
+	}
+	return c;
+}
+
+int
+foldline(Source *s)
+{
+	while (s->inp+1 >= s->inl && fillbuf(s)!=EOF)
+		;
+	if (s->inp[1] == '\n') {
+		memmove(s->inp, s->inp+2, s->inl-s->inp+3);
+		s->inl -= 2;
+		return 1;
+	}
+	return 0;
+}
+
+int
+fillbuf(Source *s)
+{
+	int n, nr;
+
+	nr = INS/8;
+	if ((char *)s->inl+nr > (char *)s->inb+INS)
+		error(FATAL, "Input buffer overflow");
+	if (s->fd<0 || (n=read(s->fd, (char *)s->inl, INS/8)) <= 0)
+		n = 0;
+	if ((*s->inp&0xff) == EOB) /* sentinel character appears in input */
+		*s->inp = EOFC;
+	s->inl += n;
+	s->inl[0] = s->inl[1]= s->inl[2]= s->inl[3] = EOB;
+	if (n==0) {
+		s->inl[0] = s->inl[1]= s->inl[2]= s->inl[3] = EOFC;
+		return EOF;
+	}
+	return 0;
+}
+
+/*
+ * Push down to new source of characters.
+ * If fd>0 and str==NULL, then from a file `name';
+ * if fd==-1 and str, then from the string.
+ */
+Source *
+setsource(char *name, int fd, char *str)
+{
+	Source *s = new(Source);
+	int len;
+
+	s->line = 1;
+	s->lineinc = 0;
+	s->fd = fd;
+	s->filename = name;
+	s->next = cursource;
+	s->ifdepth = 0;
+	cursource = s;
+	/* slop at right for EOB */
+	if (str) {
+		len = strlen(str);
+		s->inb = domalloc(len+4);
+		s->inp = s->inb;
+		strncpy((char *)s->inp, str, len);
+	} else {
+		s->inb = domalloc(INS+4);
+		s->inp = s->inb;
+		len = 0;
+	}
+	s->inl = s->inp+len;
+	s->inl[0] = s->inl[1] = EOB;
+	return s;
+}
+
+void
+unsetsource(void)
+{
+	Source *s = cursource;
+
+	if (s->fd>=0) {
+		close(s->fd);
+		dofree(s->inb);
+	}
+	cursource = s->next;
+	dofree(s);
+}
diff --git a/src/tools/lcc/cpp/macro.c b/src/tools/lcc/cpp/macro.c
new file mode 100644
index 0000000..2972083
--- /dev/null
+++ b/src/tools/lcc/cpp/macro.c
@@ -0,0 +1,514 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cpp.h"
+
+/*
+ * do a macro definition.  tp points to the name being defined in the line
+ */
+void
+dodefine(Tokenrow *trp)
+{
+	Token *tp;
+	Nlist *np;
+	Tokenrow *def, *args;
+
+	tp = trp->tp+1;
+	if (tp>=trp->lp || tp->type!=NAME) {
+		error(ERROR, "#defined token is not a name");
+		return;
+	}
+	np = lookup(tp, 1);
+	if (np->flag&ISUNCHANGE) {
+		error(ERROR, "#defined token %t can't be redefined", tp);
+		return;
+	}
+	/* collect arguments */
+	tp += 1;
+	args = NULL;
+	if (tp<trp->lp && tp->type==LP && tp->wslen==0) {
+		/* macro with args */
+		int narg = 0;
+		tp += 1;
+		args = new(Tokenrow);
+		maketokenrow(2, args);
+		if (tp->type!=RP) {
+			int err = 0;
+			for (;;) {
+				Token *atp;
+				if (tp->type!=NAME) {
+					err++;
+					break;
+				}
+				if (narg>=args->max)
+					growtokenrow(args);
+				for (atp=args->bp; atp<args->lp; atp++)
+					if (atp->len==tp->len
+					 && strncmp((char*)atp->t, (char*)tp->t, tp->len)==0)
+						error(ERROR, "Duplicate macro argument");
+				*args->lp++ = *tp;
+				narg++;
+				tp += 1;
+				if (tp->type==RP)
+					break;
+				if (tp->type!=COMMA) {
+					err++;
+					break;
+				}
+				tp += 1;
+			}
+			if (err) {
+				error(ERROR, "Syntax error in macro parameters");
+				return;
+			}
+		}
+		tp += 1;
+	}
+	trp->tp = tp;
+	if (((trp->lp)-1)->type==NL)
+		trp->lp -= 1;
+	def = normtokenrow(trp);
+	if (np->flag&ISDEFINED) {
+		if (comparetokens(def, np->vp)
+		 || (np->ap==NULL) != (args==NULL)
+		 || (np->ap && comparetokens(args, np->ap)))
+			error(ERROR, "Macro redefinition of %t", trp->bp+2);
+	}
+	if (args) {
+		Tokenrow *tap;
+		tap = normtokenrow(args);
+		dofree(args->bp);
+		args = tap;
+	}
+	np->ap = args;
+	np->vp = def;
+	np->flag |= ISDEFINED;
+}
+
+/*
+ * Definition received via -D or -U
+ */
+void
+doadefine(Tokenrow *trp, int type)
+{
+	Nlist *np;
+	static Token onetoken[1] = {{ NUMBER, 0, 0, 0, 1, (uchar*)"1" }};
+	static Tokenrow onetr = { onetoken, onetoken, onetoken+1, 1 };
+
+	trp->tp = trp->bp;
+	if (type=='U') {
+		if (trp->lp-trp->tp != 2 || trp->tp->type!=NAME)
+			goto syntax;
+		if ((np = lookup(trp->tp, 0)) == NULL)
+			return;
+		np->flag &= ~ISDEFINED;
+		return;
+	}
+	if (trp->tp >= trp->lp || trp->tp->type!=NAME)
+		goto syntax;
+	np = lookup(trp->tp, 1);
+	np->flag |= ISDEFINED;
+	trp->tp += 1;
+	if (trp->tp >= trp->lp || trp->tp->type==END) {
+		np->vp = &onetr;
+		return;
+	}
+	if (trp->tp->type!=ASGN)
+		goto syntax;
+	trp->tp += 1;
+	if ((trp->lp-1)->type == END)
+		trp->lp -= 1;
+	np->vp = normtokenrow(trp);
+	return;
+syntax:
+	error(FATAL, "Illegal -D or -U argument %r", trp);
+}
+			
+/*
+ * Do macro expansion in a row of tokens.
+ * Flag is NULL if more input can be gathered.
+ */
+void
+expandrow(Tokenrow *trp, char *flag)
+{
+	Token *tp;
+	Nlist *np;
+
+	if (flag)
+		setsource(flag, -1, "");
+	for (tp = trp->tp; tp<trp->lp; ) {
+		if (tp->type!=NAME
+		 || quicklook(tp->t[0], tp->len>1?tp->t[1]:0)==0
+		 || (np = lookup(tp, 0))==NULL
+		 || (np->flag&(ISDEFINED|ISMAC))==0
+		 || (tp->hideset && checkhideset(tp->hideset, np))) {
+			tp++;
+			continue;
+		}
+		trp->tp = tp;
+		if (np->val==KDEFINED) {
+			tp->type = DEFINED;
+			if ((tp+1)<trp->lp && (tp+1)->type==NAME)
+				(tp+1)->type = NAME1;
+			else if ((tp+3)<trp->lp && (tp+1)->type==LP
+			 && (tp+2)->type==NAME && (tp+3)->type==RP)
+				(tp+2)->type = NAME1;
+			else
+				error(ERROR, "Incorrect syntax for `defined'");
+			tp++;
+			continue;
+		}
+		if (np->flag&ISMAC)
+			builtin(trp, np->val);
+		else {
+			expand(trp, np);
+		}
+		tp = trp->tp;
+	}
+	if (flag)
+		unsetsource();
+}
+
+/*
+ * Expand the macro whose name is np, at token trp->tp, in the tokenrow.
+ * Return trp->tp at the first token next to be expanded
+ * (ordinarily the beginning of the expansion)
+ */
+void
+expand(Tokenrow *trp, Nlist *np)
+{
+	Tokenrow ntr;
+	int ntokc, narg, i;
+	Token *tp;
+	Tokenrow *atr[NARG+1];
+	int hs;
+
+	copytokenrow(&ntr, np->vp);		/* copy macro value */
+	if (np->ap==NULL)			/* parameterless */
+		ntokc = 1;
+	else {
+		ntokc = gatherargs(trp, atr, &narg);
+		if (narg<0) {			/* not actually a call (no '(') */
+			trp->tp++;
+			return;
+		}
+		if (narg != rowlen(np->ap)) {
+			error(ERROR, "Disagreement in number of macro arguments");
+			trp->tp->hideset = newhideset(trp->tp->hideset, np);
+			trp->tp += ntokc;
+			return;
+		}
+		substargs(np, &ntr, atr);	/* put args into replacement */
+		for (i=0; i<narg; i++) {
+			dofree(atr[i]->bp);
+			dofree(atr[i]);
+		}
+	}
+	doconcat(&ntr);				/* execute ## operators */
+	hs = newhideset(trp->tp->hideset, np);
+	for (tp=ntr.bp; tp<ntr.lp; tp++) {	/* distribute hidesets */
+		if (tp->type==NAME) {
+			if (tp->hideset==0)
+				tp->hideset = hs;
+			else
+				tp->hideset = unionhideset(tp->hideset, hs);
+		}
+	}
+	ntr.tp = ntr.bp;
+	insertrow(trp, ntokc, &ntr);
+	trp->tp -= rowlen(&ntr);
+	dofree(ntr.bp);
+}	
+
+/*
+ * Gather an arglist, starting in trp with tp pointing at the macro name.
+ * Return total number of tokens passed, stash number of args found.
+ * trp->tp is not changed relative to the tokenrow.
+ */
+int
+gatherargs(Tokenrow *trp, Tokenrow **atr, int *narg)
+{
+	int parens = 1;
+	int ntok = 0;
+	Token *bp, *lp;
+	Tokenrow ttr;
+	int ntokp;
+	int needspace;
+
+	*narg = -1;			/* means that there is no macro call */
+	/* look for the ( */
+	for (;;) {
+		trp->tp++;
+		ntok++;
+		if (trp->tp >= trp->lp) {
+			gettokens(trp, 0);
+			if ((trp->lp-1)->type==END) {
+				trp->lp -= 1;
+				trp->tp -= ntok;
+				return ntok;
+			}
+		}
+		if (trp->tp->type==LP)
+			break;
+		if (trp->tp->type!=NL)
+			return ntok;
+	}
+	*narg = 0;
+	ntok++;
+	ntokp = ntok;
+	trp->tp++;
+	/* search for the terminating ), possibly extending the row */
+	needspace = 0;
+	while (parens>0) {
+		if (trp->tp >= trp->lp)
+			gettokens(trp, 0);
+		if (needspace) {
+			needspace = 0;
+			makespace(trp);
+		}
+		if (trp->tp->type==END) {
+			trp->lp -= 1;
+			trp->tp -= ntok;
+			error(ERROR, "EOF in macro arglist");
+			return ntok;
+		}
+		if (trp->tp->type==NL) {
+			trp->tp += 1;
+			adjustrow(trp, -1);
+			trp->tp -= 1;
+			makespace(trp);
+			needspace = 1;
+			continue;
+		}
+		if (trp->tp->type==LP)
+			parens++;
+		else if (trp->tp->type==RP)
+			parens--;
+		trp->tp++;
+		ntok++;
+	}
+	trp->tp -= ntok;
+	/* Now trp->tp won't move underneath us */
+	lp = bp = trp->tp+ntokp;
+	for (; parens>=0; lp++) {
+		if (lp->type == LP) {
+			parens++;
+			continue;
+		}
+		if (lp->type==RP)
+			parens--;
+		if (lp->type==DSHARP)
+			lp->type = DSHARP1;	/* ## not special in arg */
+		if ((lp->type==COMMA && parens==0) || (parens<0 && (lp-1)->type!=LP)) {
+			if (*narg>=NARG-1)
+				error(FATAL, "Sorry, too many macro arguments");
+			ttr.bp = ttr.tp = bp;
+			ttr.lp = lp;
+			atr[(*narg)++] = normtokenrow(&ttr);
+			bp = lp+1;
+		}
+	}
+	return ntok;
+}
+
+/*
+ * substitute the argument list into the replacement string
+ *  This would be simple except for ## and #
+ */
+void
+substargs(Nlist *np, Tokenrow *rtr, Tokenrow **atr)
+{
+	Tokenrow tatr;
+	Token *tp;
+	int ntok, argno;
+
+	for (rtr->tp=rtr->bp; rtr->tp<rtr->lp; ) {
+		if (rtr->tp->type==SHARP) {	/* string operator */
+			tp = rtr->tp;
+			rtr->tp += 1;
+			if ((argno = lookuparg(np, rtr->tp))<0) {
+				error(ERROR, "# not followed by macro parameter");
+				continue;
+			}
+			ntok = 1 + (rtr->tp - tp);
+			rtr->tp = tp;
+			insertrow(rtr, ntok, stringify(atr[argno]));
+			continue;
+		}
+		if (rtr->tp->type==NAME
+		 && (argno = lookuparg(np, rtr->tp)) >= 0) {
+			if ((rtr->tp+1)->type==DSHARP
+			 || (rtr->tp!=rtr->bp && (rtr->tp-1)->type==DSHARP))
+				insertrow(rtr, 1, atr[argno]);
+			else {
+				copytokenrow(&tatr, atr[argno]);
+				expandrow(&tatr, "<macro>");
+				insertrow(rtr, 1, &tatr);
+				dofree(tatr.bp);
+			}
+			continue;
+		}
+		rtr->tp++;
+	}
+}
+
+/*
+ * Evaluate the ## operators in a tokenrow
+ */
+void
+doconcat(Tokenrow *trp)
+{
+	Token *ltp, *ntp;
+	Tokenrow ntr;
+	int len;
+
+	for (trp->tp=trp->bp; trp->tp<trp->lp; trp->tp++) {
+		if (trp->tp->type==DSHARP1)
+			trp->tp->type = DSHARP;
+		else if (trp->tp->type==DSHARP) {
+			char tt[128];
+			ltp = trp->tp-1;
+			ntp = trp->tp+1;
+			if (ltp<trp->bp || ntp>=trp->lp) {
+				error(ERROR, "## occurs at border of replacement");
+				continue;
+			}
+			len = ltp->len + ntp->len;
+			strncpy((char*)tt, (char*)ltp->t, ltp->len);
+			strncpy((char*)tt+ltp->len, (char*)ntp->t, ntp->len);
+			tt[len] = '\0';
+			setsource("<##>", -1, tt);
+			maketokenrow(3, &ntr);
+			gettokens(&ntr, 1);
+			unsetsource();
+			if (ntr.lp-ntr.bp!=2 || ntr.bp->type==UNCLASS)
+				error(WARNING, "Bad token %r produced by ##", &ntr);
+			ntr.lp = ntr.bp+1;
+			trp->tp = ltp;
+			makespace(&ntr);
+			insertrow(trp, (ntp-ltp)+1, &ntr);
+			dofree(ntr.bp);
+			trp->tp--;
+		}
+	}
+}
+
+/*
+ * tp is a potential parameter name of macro mac;
+ * look it up in mac's arglist, and if found, return the
+ * corresponding index in the argname array.  Return -1 if not found.
+ */
+int
+lookuparg(Nlist *mac, Token *tp)
+{
+	Token *ap;
+
+	if (tp->type!=NAME || mac->ap==NULL)
+		return -1;
+	for (ap=mac->ap->bp; ap<mac->ap->lp; ap++) {
+		if (ap->len==tp->len && strncmp((char*)ap->t,(char*)tp->t,ap->len)==0)
+			return ap - mac->ap->bp;
+	}
+	return -1;
+}
+
+/*
+ * Return a quoted version of the tokenrow (from # arg)
+ */
+#define	STRLEN	512
+Tokenrow *
+stringify(Tokenrow *vp)
+{
+	static Token t = { STRING };
+	static Tokenrow tr = { &t, &t, &t+1, 1 };
+	Token *tp;
+	uchar s[STRLEN];
+	uchar *sp = s, *cp;
+	int i, instring;
+
+	*sp++ = '"';
+	for (tp = vp->bp; tp < vp->lp; tp++) {
+		instring = tp->type==STRING || tp->type==CCON;
+		if (sp+2*tp->len >= &s[STRLEN-10]) {
+			error(ERROR, "Stringified macro arg is too long");
+			break;
+		}
+		if (tp->wslen && (tp->flag&XPWS)==0)
+			*sp++ = ' ';
+		for (i=0, cp=tp->t; i<tp->len; i++) {	
+			if (instring && (*cp=='"' || *cp=='\\'))
+				*sp++ = '\\';
+			*sp++ = *cp++;
+		}
+	}
+	*sp++ = '"';
+	*sp = '\0';
+	sp = s;
+	t.len = strlen((char*)sp);
+	t.t = newstring(sp, t.len, 0);
+	return &tr;
+}
+
+/*
+ * expand a builtin name
+ */
+void
+builtin(Tokenrow *trp, int biname)
+{
+	char *op;
+	Token *tp;
+	Source *s;
+
+	tp = trp->tp;
+	trp->tp++;
+	/* need to find the real source */
+	s = cursource;
+	while (s && s->fd==-1)
+		s = s->next;
+	if (s==NULL)
+		s = cursource;
+	/* most are strings */
+	tp->type = STRING;
+	if (tp->wslen) {
+		*outbufp++ = ' ';
+		tp->wslen = 1;
+	}
+	op = outbufp;
+	*op++ = '"';
+	switch (biname) {
+
+	case KLINENO:
+		tp->type = NUMBER;
+		op = outnum(op-1, s->line);
+		break;
+
+	case KFILE: {
+		char *src = s->filename;
+		while ((*op++ = *src++) != 0)
+			if (src[-1] == '\\')
+				*op++ = '\\';
+		op--;
+		break;
+		}
+
+	case KDATE:
+		strncpy(op, curtime+4, 7);
+		strncpy(op+7, curtime+20, 4);
+		op += 11;
+		break;
+
+	case KTIME:
+		strncpy(op, curtime+11, 8);
+		op += 8;
+		break;
+
+	default:
+		error(ERROR, "cpp botch: unknown internal macro");
+		return;
+	}
+	if (tp->type==STRING)
+		*op++ = '"';
+	tp->t = (uchar*)outbufp;
+	tp->len = op - outbufp;
+	outbufp = op;
+}
diff --git a/src/tools/lcc/cpp/nlist.c b/src/tools/lcc/cpp/nlist.c
new file mode 100644
index 0000000..d3a8357
--- /dev/null
+++ b/src/tools/lcc/cpp/nlist.c
@@ -0,0 +1,104 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cpp.h"
+
+extern	char	*optarg;
+extern	int	optind;
+extern	int	verbose;
+extern	int	Cplusplus;
+Nlist	*kwdefined;
+char	wd[128];
+
+#define	NLSIZE	128
+
+static Nlist	*nlist[NLSIZE];
+
+struct	kwtab {
+	char	*kw;
+	int	val;
+	int	flag;
+} kwtab[] = {
+	{"if",		KIF,		ISKW},
+	{"ifdef",	KIFDEF,		ISKW},
+	{"ifndef",	KIFNDEF,	ISKW},
+	{"elif",		KELIF,		ISKW},
+	{"else",		KELSE,		ISKW},
+	{"endif",	KENDIF,		ISKW},
+	{"include",	KINCLUDE,	ISKW},
+	{"define",	KDEFINE,	ISKW},
+	{"undef",	KUNDEF,		ISKW},
+	{"line",		KLINE,		ISKW},
+	{"warning",	KWARNING,	ISKW},
+	{"error",	KERROR,		ISKW},
+	{"pragma",	KPRAGMA,	ISKW},
+	{"eval",		KEVAL,		ISKW},
+	{"defined",	KDEFINED,	ISDEFINED+ISUNCHANGE},
+	{"__LINE__",	KLINENO,	ISMAC+ISUNCHANGE},
+	{"__FILE__",	KFILE,		ISMAC+ISUNCHANGE},
+	{"__DATE__",	KDATE,		ISMAC+ISUNCHANGE},
+	{"__TIME__",	KTIME,		ISMAC+ISUNCHANGE},
+	{"__STDC__",	KSTDC,		ISUNCHANGE},
+	{NULL}
+};
+
+unsigned long	namebit[077+1];
+Nlist 	*np;
+
+void
+setup_kwtab(void)
+{
+	struct kwtab *kp;
+	Nlist *np;
+	Token t;
+	static Token deftoken[1] = {{ NAME, 0, 0, 0, 7, (uchar*)"defined" }};
+	static Tokenrow deftr = { deftoken, deftoken, deftoken+1, 1 };
+
+	for (kp=kwtab; kp->kw; kp++) {
+		t.t = (uchar*)kp->kw;
+		t.len = strlen(kp->kw);
+		np = lookup(&t, 1);
+		np->flag = kp->flag;
+		np->val = kp->val;
+		if (np->val == KDEFINED) {
+			kwdefined = np;
+			np->val = NAME;
+			np->vp = &deftr;
+			np->ap = 0;
+		}
+	}
+}
+
+Nlist *
+lookup(Token *tp, int install)
+{
+	unsigned int h;
+	Nlist *np;
+	uchar *cp, *cpe;
+
+	h = 0;
+	for (cp=tp->t, cpe=cp+tp->len; cp<cpe; )
+		h += *cp++;
+	h %= NLSIZE;
+	np = nlist[h];
+	while (np) {
+		if (*tp->t==*np->name && tp->len==np->len 
+		 && strncmp((char*)tp->t, (char*)np->name, tp->len)==0)
+			return np;
+		np = np->next;
+	}
+	if (install) {
+		np = new(Nlist);
+		np->vp = NULL;
+		np->ap = NULL;
+		np->flag = 0;
+		np->val = 0;
+		np->len = tp->len;
+		np->name = newstring(tp->t, tp->len, 0);
+		np->next = nlist[h];
+		nlist[h] = np;
+		quickset(tp->t[0], tp->len>1? tp->t[1]:0);
+		return np;
+	}
+	return NULL;
+}
diff --git a/src/tools/lcc/cpp/tokens.c b/src/tools/lcc/cpp/tokens.c
new file mode 100644
index 0000000..3570896
--- /dev/null
+++ b/src/tools/lcc/cpp/tokens.c
@@ -0,0 +1,370 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "cpp.h"
+
+static char wbuf[2*OBS];
+static char *wbp = wbuf;
+
+/*
+ * 1 for tokens that don't need whitespace when they get inserted
+ * by macro expansion
+ */
+static const char wstab[] = {
+	0,	/* END */
+	0,	/* UNCLASS */
+	0,	/* NAME */
+	0,	/* NUMBER */
+	0,	/* STRING */
+	0,	/* CCON */
+	1,	/* NL */
+	0,	/* WS */
+	0,	/* DSHARP */
+	0,	/* EQ */
+	0,	/* NEQ */
+	0,	/* LEQ */
+	0,	/* GEQ */
+	0,	/* LSH */
+	0,	/* RSH */
+	0,	/* LAND */
+	0,	/* LOR */
+	0,	/* PPLUS */
+	0,	/* MMINUS */
+	0,	/* ARROW */
+	1,	/* SBRA */
+	1,	/* SKET */
+	1,	/* LP */
+	1,	/* RP */
+	0,	/* DOT */
+	0,	/* AND */
+	0,	/* STAR */
+	0,	/* PLUS */
+	0,	/* MINUS */
+	0,	/* TILDE */
+	0,	/* NOT */
+	0,	/* SLASH */
+	0,	/* PCT */
+	0,	/* LT */
+	0,	/* GT */
+	0,	/* CIRC */
+	0,	/* OR */
+	0,	/* QUEST */
+	0,	/* COLON */
+	0,	/* ASGN */
+	1,	/* COMMA */
+	0,	/* SHARP */
+	1,	/* SEMIC */
+	1,	/* CBRA */
+	1,	/* CKET */
+	0,	/* ASPLUS */
+ 	0,	/* ASMINUS */
+ 	0,	/* ASSTAR */
+ 	0,	/* ASSLASH */
+ 	0,	/* ASPCT */
+ 	0,	/* ASCIRC */
+ 	0,	/* ASLSH */
+	0,	/* ASRSH */
+ 	0,	/* ASOR */
+ 	0,	/* ASAND */
+	0,	/* ELLIPS */
+	0,	/* DSHARP1 */
+	0,	/* NAME1 */
+	0,	/* DEFINED */
+	0,	/* UMINUS */
+};
+
+void
+maketokenrow(int size, Tokenrow *trp)
+{
+	trp->max = size;
+	if (size>0)
+		trp->bp = (Token *)domalloc(size*sizeof(Token));
+	else
+		trp->bp = NULL;
+	trp->tp = trp->bp;
+	trp->lp = trp->bp;
+}
+
+Token *
+growtokenrow(Tokenrow *trp)
+{
+	int ncur = trp->tp - trp->bp;
+	int nlast = trp->lp - trp->bp;
+
+	trp->max = 3*trp->max/2 + 1;
+	trp->bp = (Token *)realloc(trp->bp, trp->max*sizeof(Token));
+	if (trp->bp == NULL)
+		error(FATAL, "Out of memory from realloc");
+	trp->lp = &trp->bp[nlast];
+	trp->tp = &trp->bp[ncur];
+	return trp->lp;
+}
+
+/*
+ * Compare a row of tokens, ignoring the content of WS; return !=0 if different
+ */
+int
+comparetokens(Tokenrow *tr1, Tokenrow *tr2)
+{
+	Token *tp1, *tp2;
+
+	tp1 = tr1->tp;
+	tp2 = tr2->tp;
+	if (tr1->lp-tp1 != tr2->lp-tp2)
+		return 1;
+	for (; tp1<tr1->lp ; tp1++, tp2++) {
+		if (tp1->type != tp2->type
+		 || (tp1->wslen==0) != (tp2->wslen==0)
+		 || tp1->len != tp2->len
+		 || strncmp((char*)tp1->t, (char*)tp2->t, tp1->len)!=0)
+			return 1;
+	}
+	return 0;
+}
+
+/*
+ * replace ntok tokens starting at dtr->tp with the contents of str.
+ * tp ends up pointing just beyond the replacement.
+ * Canonical whitespace is assured on each side.
+ */
+void
+insertrow(Tokenrow *dtr, int ntok, Tokenrow *str)
+{
+	int nrtok = rowlen(str);
+
+	dtr->tp += ntok;
+	adjustrow(dtr, nrtok-ntok);
+	dtr->tp -= ntok;
+	movetokenrow(dtr, str);
+	makespace(dtr);
+	dtr->tp += nrtok;
+	makespace(dtr);
+}
+
+/*
+ * make sure there is WS before trp->tp, if tokens might merge in the output
+ */
+void
+makespace(Tokenrow *trp)
+{
+	uchar *tt;
+	Token *tp = trp->tp;
+
+	if (tp >= trp->lp)
+		return;
+	if (tp->wslen) {
+		if (tp->flag&XPWS
+		 && (wstab[tp->type] || (trp->tp>trp->bp && wstab[(tp-1)->type]))) {
+			tp->wslen = 0;
+			return;
+		}
+		tp->t[-1] = ' ';
+		return;
+	}
+	if (wstab[tp->type] || (trp->tp>trp->bp && wstab[(tp-1)->type]))
+		return;
+	tt = newstring(tp->t, tp->len, 1);
+	*tt++ = ' ';
+	tp->t = tt;
+	tp->wslen = 1;
+	tp->flag |= XPWS;
+}
+
+/*
+ * Copy an entire tokenrow into another, at tp.
+ * It is assumed that there is enough space.
+ *  Not strictly conforming.
+ */
+void
+movetokenrow(Tokenrow *dtr, Tokenrow *str)
+{
+	int nby;
+
+	/* nby = sizeof(Token) * (str->lp - str->bp); */
+	nby = (char *)str->lp - (char *)str->bp;
+	memmove(dtr->tp, str->bp, nby);
+}
+
+/*
+ * Move the tokens in a row, starting at tr->tp, rightward by nt tokens;
+ * nt may be negative (left move).
+ * The row may need to be grown.
+ * Non-strictly conforming because of the (char *), but easily fixed
+ */
+void
+adjustrow(Tokenrow *trp, int nt)
+{
+	int nby, size;
+
+	if (nt==0)
+		return;
+	size = (trp->lp - trp->bp) + nt;
+	while (size > trp->max)
+		growtokenrow(trp);
+	/* nby = sizeof(Token) * (trp->lp - trp->tp); */
+	nby = (char *)trp->lp - (char *)trp->tp;
+	if (nby)
+		memmove(trp->tp+nt, trp->tp, nby);
+	trp->lp += nt;
+}
+
+/*
+ * Copy a row of tokens into the destination holder, allocating
+ * the space for the contents.  Return the destination.
+ */
+Tokenrow *
+copytokenrow(Tokenrow *dtr, Tokenrow *str)
+{
+	int len = rowlen(str);
+
+	maketokenrow(len, dtr);
+	movetokenrow(dtr, str);
+	dtr->lp += len;
+	return dtr;
+}
+
+/*
+ * Produce a copy of a row of tokens.  Start at trp->tp.
+ * The value strings are copied as well.  The first token
+ * has WS available.
+ */
+Tokenrow *
+normtokenrow(Tokenrow *trp)
+{
+	Token *tp;
+	Tokenrow *ntrp = new(Tokenrow);
+	int len;
+
+	len = trp->lp - trp->tp;
+	if (len<=0)
+		len = 1;
+	maketokenrow(len, ntrp);
+	for (tp=trp->tp; tp < trp->lp; tp++) {
+		*ntrp->lp = *tp;
+		if (tp->len) {
+			ntrp->lp->t = newstring(tp->t, tp->len, 1);
+			*ntrp->lp->t++ = ' ';
+			if (tp->wslen)
+				ntrp->lp->wslen = 1;
+		}
+		ntrp->lp++;
+	}
+	if (ntrp->lp > ntrp->bp)
+		ntrp->bp->wslen = 0;
+	return ntrp;
+}
+
+/*
+ * Debugging
+ */
+void
+peektokens(Tokenrow *trp, char *str)
+{
+	Token *tp;
+
+	tp = trp->tp;
+	flushout();
+	if (str)
+		fprintf(stderr, "%s ", str);
+	if (tp<trp->bp || tp>trp->lp)
+		fprintf(stderr, "(tp offset %ld) ", (long int) (tp - trp->bp));
+	for (tp=trp->bp; tp<trp->lp && tp<trp->bp+32; tp++) {
+		if (tp->type!=NL) {
+			int c = tp->t[tp->len];
+			tp->t[tp->len] = 0;
+			fprintf(stderr, "%s", tp->t);
+			tp->t[tp->len] = c;
+		}
+		if (tp->type==NAME) {
+			fprintf(stderr, tp==trp->tp?"{*":"{");
+			prhideset(tp->hideset);
+			fprintf(stderr, "} ");
+		} else
+			fprintf(stderr, tp==trp->tp?"{%x*} ":"{%x} ", tp->type);
+	}
+	fprintf(stderr, "\n");
+	fflush(stderr);
+}
+
+void
+puttokens(Tokenrow *trp)
+{
+	Token *tp;
+	int len;
+	uchar *p;
+
+	if (verbose)
+		peektokens(trp, "");
+	tp = trp->bp;
+	for (; tp<trp->lp; tp++) {
+		len = tp->len+tp->wslen;
+		p = tp->t-tp->wslen;
+		while (tp<trp->lp-1 && p+len == (tp+1)->t - (tp+1)->wslen) {
+			tp++;
+			len += tp->wslen+tp->len;
+		}
+		if (len>OBS/2) {		/* handle giant token */
+			if (wbp > wbuf)
+				write(1, wbuf, wbp-wbuf);
+			write(1, (char *)p, len);
+			wbp = wbuf;
+		} else {	
+			memcpy(wbp, p, len);
+			wbp += len;
+		}
+		if (wbp >= &wbuf[OBS]) {
+			write(1, wbuf, OBS);
+			if (wbp > &wbuf[OBS])
+				memcpy(wbuf, wbuf+OBS, wbp - &wbuf[OBS]);
+			wbp -= OBS;
+		}
+	}
+	trp->tp = tp;
+	if (cursource->fd==0)
+		flushout();
+}
+
+void
+flushout(void)
+{
+	if (wbp>wbuf) {
+		write(1, wbuf, wbp-wbuf);
+		wbp = wbuf;
+	}
+}
+
+/*
+ * turn a row into just a newline
+ */
+void
+setempty(Tokenrow *trp)
+{
+	trp->tp = trp->bp;
+	trp->lp = trp->bp+1;
+	*trp->bp = nltoken;
+}
+
+/*
+ * generate a number
+ */
+char *
+outnum(char *p, int n)
+{
+	if (n>=10)
+		p = outnum(p, n/10);
+	*p++ = n%10 + '0';
+	return p;
+}
+
+/*
+ * allocate and initialize a new string from s, of length l, at offset o
+ * Null terminated.
+ */
+uchar *
+newstring(uchar *s, int l, int o)
+{
+	uchar *ns = (uchar *)domalloc(l+o+1);
+
+	ns[l+o] = '\0';
+	return (uchar*)strncpy((char*)ns+o, (char*)s, l) - o;
+}
diff --git a/src/tools/lcc/cpp/unix.c b/src/tools/lcc/cpp/unix.c
new file mode 100644
index 0000000..ff1496a
--- /dev/null
+++ b/src/tools/lcc/cpp/unix.c
@@ -0,0 +1,134 @@
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include "cpp.h"
+
+extern	int lcc_getopt(int, char *const *, const char *);
+extern	char	*optarg, rcsid[];
+extern	int	optind;
+int	verbose;
+int	Mflag;	/* only print active include files */
+char	*objname; /* "src.$O: " */
+int	Cplusplus = 1;
+
+void
+setup(int argc, char **argv)
+{
+	int c, fd, i;
+	char *fp, *dp;
+	Tokenrow tr;
+	extern void setup_kwtab(void);
+	uchar *includeDirs[ NINCLUDE ] = { 0 };
+	int   numIncludeDirs = 0;
+
+	setup_kwtab();
+	while ((c = lcc_getopt(argc, argv, "MNOVv+I:D:U:F:lg")) != -1)
+		switch (c) {
+		case 'N':
+			for (i=0; i<NINCLUDE; i++)
+				if (includelist[i].always==1)
+					includelist[i].deleted = 1;
+			break;
+		case 'I':
+			includeDirs[ numIncludeDirs++ ] = newstring( (uchar *)optarg, strlen( optarg ), 0 );
+			break;
+		case 'D':
+		case 'U':
+			setsource("<cmdarg>", -1, optarg);
+			maketokenrow(3, &tr);
+			gettokens(&tr, 1);
+			doadefine(&tr, c);
+			unsetsource();
+			break;
+		case 'M':
+			Mflag++;
+			break;
+		case 'v':
+			fprintf(stderr, "%s %s\n", argv[0], rcsid);
+			break;
+		case 'V':
+			verbose++;
+			break;
+		case '+':
+			Cplusplus++;
+			break;
+		default:
+			break;
+		}
+	dp = ".";
+	fp = "<stdin>";
+	fd = 0;
+	if (optind<argc) {
+		dp = basepath( argv[optind] );
+		fp = (char*)newstring((uchar*)argv[optind], strlen(argv[optind]), 0);
+		if ((fd = open(fp, 0)) <= 0)
+			error(FATAL, "Can't open input file %s", fp);
+	}
+	if (optind+1<argc) {
+		int fdo;
+#ifdef WIN32
+		fdo = creat(argv[optind+1], _S_IREAD | _S_IWRITE);
+#else
+		fdo = creat(argv[optind+1], 0666);
+#endif
+		if (fdo<0)
+			error(FATAL, "Can't open output file %s", argv[optind+1]);
+		dup2(fdo, 1);
+	}
+	if(Mflag)
+		setobjname(fp);
+	includelist[NINCLUDE-1].always = 0;
+	includelist[NINCLUDE-1].file = dp;
+
+	for( i = 0; i < numIncludeDirs; i++ )
+		appendDirToIncludeList( (char *)includeDirs[ i ] );
+
+	setsource(fp, fd, NULL);
+}
+
+
+char *basepath( char *fname )
+{
+	char *dp = ".";
+	char *p;
+	if ((p = strrchr(fname, '/')) != NULL) {
+		int dlen = p - fname;
+		dp = (char*)newstring((uchar*)fname, dlen+1, 0);
+		dp[dlen] = '\0';
+	}
+
+	return dp;
+}
+
+/* memmove is defined here because some vendors don't provide it at
+   all and others do a terrible job (like calling malloc) */
+// -- ouch, that hurts -- ln
+#ifndef __APPLE__   /* always use the system memmove() on Mac OS X. --ryan. */
+#ifdef memmove
+#undef memmove
+#endif
+void *
+memmove(void *dp, const void *sp, size_t n)
+{
+	unsigned char *cdp, *csp;
+
+	if (n<=0)
+		return dp;
+	cdp = dp;
+	csp = (unsigned char *)sp;
+	if (cdp < csp) {
+		do {
+			*cdp++ = *csp++;
+		} while (--n);
+	} else {
+		cdp += n;
+		csp += n;
+		do {
+			*--cdp = *--csp;
+		} while (--n);
+	}
+	return dp;
+}
+#endif