code review 186263: eliminate the package global name space assumption in o...

src/cmd/cc/lex.c

 // Inferno utils/cc/lex.c
 // http://code.google.com/p/inferno-os/source/browse/utils/cc/lex.c
 //
 //      Copyright © 1994-1999 Lucent Technologies Inc.  All rights reserved.
 //      Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
 //      Portions Copyright © 1997-1999 Vita Nuova Limited
 //      Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
 //      Portions Copyright © 2004,2006 Bruce Ellis
 //      Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
 //      Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
@@ skipping 387 matching lines @@
 
 Sym*
 lookup(void)
 {
         Sym *s;
         uint32 h;
         char *p;
         int c, n;
         char *r, *w;
 
+        if(symb[0] == 0xc2 && symb[1] == 0xb7) {
+                // turn leading · into ""·
+                memmove(symb+2, symb, w-symb);
+                symb[0] = '"';
+                symb[1] = '"';
+        }
+
         // turn · into .
         for(r=w=symb; *r; r++) {
                 if((uchar)*r == 0xc2 && (uchar)*(r+1) == 0xb7) {
                         *w++ = '.';
                         r++;
                 }else
                         *w++ = *r;
         }
         *w++ = '\0';
-        if(symb[0] == '.') {
-                // turn leading . into "".
-                memmove(symb+2, symb, w-symb);

[r, 2010/01/22 00:02:27]

i presume there's known to be space

-                symb[0] = '"';
-                symb[1] = '"';
-        }
 
         h = 0;
         for(p=symb; *p;) {
                 h = h * 3;
                 h += *p++;
         }
         n = (p - symb) + 1;
         h &= 0xffffff;
         h %= NHASH;
         c = symb[0];
@@ skipping 1142 matching lines @@
                 return alloc(n+d);
         p = realloc(p, n+d);
         if(p == nil) {
                 print("allocn out of mem\n");
                 exit(1);
         }
         if(d > 0)
                 memset((char*)p+n, 0, d);
         return p;
 }