1 files changed, 103 insertions, 0 deletions
diff --git a/src/tools/lcc/cpp/nlist.c b/src/tools/lcc/cpp/nlist.c
new file mode 100644
index 0000000..72089c4
--- /dev/null
+++ b/src/tools/lcc/cpp/nlist.c
@@ -0,0 +1,103 @@
+#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},
+	{"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;
+}