kernel - Add support for %z[d,x,etc].

* %z used to be used for hex printing.  Instead use it for
  size_t as per ANSI-C.

diff --git a/sys/kern/subr_prf.c b/sys/kern/subr_prf.c
index 4fa2794..8281a31 100644 (file)
--- a/sys/kern/subr_prf.c
+++ b/sys/kern/subr_prf.c
@@ -517,7 +517,7 @@ kvcprintf(char const *fmt, void (*func)(int, void*), void *arg, int radix, __va_
        int ch, n;
        uintmax_t num;
        int base, tmp, width, ladjust, sharpflag, neg, sign, dot;
-       int jflag, lflag, qflag, tflag;
+       int jflag, lflag, qflag, tflag, zflag;
        int dwidth, upper;
        char padc;
        int retval = 0, stop = 0;
@@ -544,7 +544,7 @@ kvcprintf(char const *fmt, void (*func)(int, void*), void *arg, int radix, __va_
                }
                percent = fmt - 1;
                dot = dwidth = ladjust = neg = sharpflag = sign = upper = 0;
-               jflag = lflag = qflag = tflag = 0;
+               jflag = lflag = qflag = tflag = zflag = 0;
 
 reswitch:
                switch (ch = (u_char)*fmt++) {
@@ -708,9 +708,8 @@ reswitch:
                        base = 16;
                        goto handle_nosign;
                case 'z':
-                       base = 16;
-                       sign = 1;
-                       goto handle_sign;
+                       zflag = 1;
+                       goto reswitch;
 handle_nosign:
                        sign = 0;
                        if (jflag)
@@ -721,6 +720,8 @@ handle_nosign:
                                num = __va_arg(ap, u_quad_t);
                        else if (tflag)
                                num = __va_arg(ap, ptrdiff_t);
+                       else if (zflag)
+                               num = __va_arg(ap, size_t);
                        else
                                num = __va_arg(ap, u_int);
                        goto number;
@@ -733,6 +734,8 @@ handle_sign:
                                num = __va_arg(ap, quad_t);
                        else if (tflag)
                                num = __va_arg(ap, ptrdiff_t);
+                       else if (zflag)
+                               num = __va_arg(ap, ssize_t);
                        else
                                num = __va_arg(ap, int);
 number: