From 374e7a1c57ec44a98ad1e9df2291b6638c54efa0 Mon Sep 17 00:00:00 2001
From: David Given <dg@cowlark.com>
Date: Sun, 1 Jan 2017 17:40:06 +0000
Subject: [PATCH] Add support for the ~ operator.

---
 lang/b/compiler/b.h  | 1 +
 lang/b/compiler/b0.c | 6 ++++--
 lang/b/compiler/b1.c | 5 +++++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/lang/b/compiler/b.h b/lang/b/compiler/b.h
index 3da667be6..f5a11fd2a 100644
--- a/lang/b/compiler/b.h
+++ b/lang/b/compiler/b.h
@@ -104,6 +104,7 @@ char* manglename(char* name, char prefix);
 #define	AMPER	23
 #define	STAR	24
 #define	QUEST	25
+#define	NOT     26
 
 #define	PLUS	30
 #define	MINUS	31
diff --git a/lang/b/compiler/b0.c b/lang/b/compiler/b0.c
index e6845bea0..cb28a6a3c 100644
--- a/lang/b/compiler/b0.c
+++ b/lang/b/compiler/b0.c
@@ -1060,6 +1060,7 @@ tand:
 		goto oponst;
 
 	case EXCLA:
+	case NOT:
 		if (andflg)
 			goto syntax;
 		goto oponst;
@@ -1225,7 +1226,7 @@ int opdope[] = {
 	034200,	/* &un */
 	034200,	/* *un */
 	014201,	/* ? */
-	000000,	/* 26 */
+	034200, /* ~un */
 	000000,	/* 27 */
 	000000,	/* 28 */
 	000000,	/* 29 */
@@ -1290,7 +1291,7 @@ char ctab[128] = {
 	UNKN,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,
 	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,
 	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,	LETTER,
-	LETTER,	LETTER,	LETTER,	LBRACE,	OR,	RBRACE,	UNKN,	UNKN
+	LETTER,	LETTER,	LETTER,	LBRACE,	OR,	RBRACE,	NOT,	UNKN
 };
 
 /* debug function */
@@ -1320,6 +1321,7 @@ void printtoken(int tok, FILE *out)
 	strtab[23] = "AMPER";
 	strtab[24] = "STAR";
 	strtab[25] = "QUEST";
+	strtab[26] = "NOT";
 
 	strtab[30] = "PLUS";
 	strtab[31] = "MINUS";
diff --git a/lang/b/compiler/b1.c b/lang/b/compiler/b1.c
index 19dc17a68..cc08d21ca 100644
--- a/lang/b/compiler/b1.c
+++ b/lang/b/compiler/b1.c
@@ -305,6 +305,11 @@ rcexpr(struct tnode *tr)
 		C_ngi(wordsize);
 		return;
 
+	case NOT:
+		rcexpr(tr->tr1);
+		C_com(wordsize);
+		return;
+
 	case QUEST:
 		cbranch(tr->tr1, o1=isn++);
 		rcexpr(tr->tr2->tr1);