From 57eb0c15a10dfcd9816b84166106a1aa32323325 Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Wed, 20 May 2020 12:15:24 -0700
Subject: fix: made rune constants unsigned for implicit casting

---
 sys/cmd/cc/lex.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

(limited to 'sys/cmd/cc/lex.c')

diff --git a/sys/cmd/cc/lex.c b/sys/cmd/cc/lex.c
index 6c57b3c..8ce4e79 100644
--- a/sys/cmd/cc/lex.c
+++ b/sys/cmd/cc/lex.c
@@ -25,13 +25,13 @@ puttok(Token tok)
 // -----------------------------------------------------------------------
 // simple wrappers
 
-byte
+int
 getbyte(Lexer *lx)
 {
     return bufio·getbyte(&lx->io->buf);
 }
 
-byte
+int
 getnsbyte(Lexer *lx)
 {
     int b;
@@ -246,7 +246,6 @@ lex(Lexer *lx)
 {
     int    b, n, f;
     vlong  v, _;
-    uint   u;
     rune   r;
     string s;
     double d;
@@ -260,7 +259,7 @@ GetByte:
 Dispatch:
     tok.pos.beg = lx->pos;
 
-    if (b >= RuneSelf || b == '_')
+    if ((b != EOF && b >= RuneSelf) || b == '_')
         goto Talpha;
     if (isalpha(b)) {
         if (b != 'L')
@@ -604,7 +603,6 @@ Dispatch:
         goto Return;
 
     Talpha:
-        u = b; 
         s = lx->buf;
         e = lx->buf + arrlen(lx->buf);
         for (;;) {
@@ -612,18 +610,18 @@ Dispatch:
                 errorat(lx->pos, "identifier too long for buffer: %s", s);
                 goto Nospace;
             }
-            if (u != EOF && u >= RuneSelf) {
+            if (b != EOF && b >= RuneSelf) {
                 ungetbyte(lx);
                 r = getrune(lx);
                 if (!utf8·isletter(r) && !utf8·isdigit(r) && r != 0xb7) {
                     errorat(lx->pos, "invalid identifier character %d", r);
                 }
                 s += utf8·runetochar(s, &r);
-            } else if (!isalnum(u) && u != '_') 
+            } else if (!isalnum(b) && b != '_') 
                 break;
             else 
-                *s++ = u;
-            u = getbyte(lx);
+                *s++ = b;
+            b = getbyte(lx);
         }
         *s = '\0';
         ungetbyte(lx);
@@ -639,6 +637,7 @@ Dispatch:
         sym = lookup(&lx->sym, tok.val.s);
         if (sym) {
             io = makeio();
+            printf("EXPANDING MACRO %s\n", sym->name);
             io->buf.end   += expandmacro(lx, sym, io->b);
             *io->buf.end++ = EOF;
             pushio(lx, io);
-- 
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