convert C runtime to 32-bit runes;

rune now unsigned.

R=r
DELTA=10  (1 added, 0 deleted, 9 changed)
OCL=34140
CL=34146

include/fmt.h

@@ -30,7 +30,7 @@ struct Fmt{
 	void	*farg;			/* to make flush a closure */
 	int	nfmt;			/* num chars formatted so far */
 	va_list	args;			/* args passed to dofmt */
-	int	r;			/* % format Rune */
+	Rune	r;			/* % format Rune */
 	int	width;
 	int	prec;
 	unsigned long	flags;

src/lib9/fmt/dofmt.c

@@ -618,12 +618,13 @@ __flagfmt(Fmt *f)
 int
 __badfmt(Fmt *f)
 {
-	char x[3];
+	char x[2+UTFmax];
+	int n;
 
 	x[0] = '%';
-	x[1] = f->r;
-	x[2] = '%';
-	f->prec = 3;
-	__fmtcpy(f, (const void*)x, 3, 3);
+	n = 1 + runetochar(x+1, &f->r);
+	x[n++] = '%';
+	f->prec = n;
+	__fmtcpy(f, (const void*)x, n, n);
 	return 0;
 }

src/lib9/utf/utf.h

@@ -18,7 +18,7 @@
 
 #include <stdint.h>
 
-typedef signed int Rune;	/* Code-point values in Unicode 4.0 are 21 bits wide.*/
+typedef unsigned int Rune;	/* Code-point values in Unicode 4.0 are 21 bits wide.*/
 
 enum
 {

src/libbio/bgetrune.c

@@ -33,7 +33,7 @@ Bgetrune(Biobuf *bp)
 {
 	int c, i;
 	Rune rune;
-	char str[4];
+	char str[UTFmax];
 
 	c = Bgetc(bp);
 	if(c < Runeself) {		/* one char */

src/libbio/bputrune.c

@@ -32,7 +32,7 @@ int
 Bputrune(Biobuf *bp, long c)
 {
 	Rune rune;
-	char str[4];
+	char str[UTFmax];
 	int n;
 
 	rune = c;