2 * Copyright (c) 1986, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
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8 * the permission of UNIX System Laboratories, Inc.
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11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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34 * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
41 * Standaloneified version of the FreeBSD kernel printf family.
44 #include <sys/types.h>
45 #include <sys/stddef.h>
46 #include <sys/stdint.h>
52 * Note that stdarg.h and the ANSI style va_start macro is used for both
53 * ANSI and traditional C compilers.
55 #include <machine/stdarg.h>
57 #define MAXNBUF (sizeof(intmax_t) * CHAR_BIT + 1)
59 typedef void (kvprintf_fn_t)(int, void *);
61 static char *ksprintn (char *buf, uintmax_t num, int base, int *len, int upper);
62 static int kvprintf(char const *fmt, kvprintf_fn_t *func, void *arg, int radix, va_list ap);
65 putchar_wrapper(int cc, void *arg)
72 printf(const char *fmt, ...)
78 retval = kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
84 vprintf(const char *fmt, va_list ap)
87 kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
91 sprintf(char *buf, const char *cfmt, ...)
97 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
109 snprint_func(int ch, void *arg)
111 struct print_buf *pbuf = arg;
113 if (pbuf->size < 2) {
115 * Reserve last buffer position for the terminating
125 snprintf(char *buf, size_t size, const char *cfmt, ...)
129 struct print_buf arg;
135 retval = kvprintf(cfmt, &snprint_func, &arg, 10, ap);
144 vsprintf(char *buf, const char *cfmt, va_list ap)
148 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
153 * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
154 * order; return an optional length and a pointer to the last character
155 * written in the buffer (i.e., the first character of the string).
156 * The buffer pointed to by `nbuf' must have length >= MAXNBUF.
159 ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
166 c = hex2ascii(num % base);
167 *++p = upper ? toupper(c) : c;
168 } while (num /= base);
175 * Scaled down version of printf(3).
177 * Two additional formats:
179 * The format %b is supported to decode error registers.
182 * printf("reg=%b\n", regval, "<base><arg>*");
184 * where <base> is the output base expressed as a control character, e.g.
185 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
186 * the first of which gives the bit number to be inspected (origin 1), and
187 * the next characters (up to a control character, i.e. a character <= 32),
188 * give the name of the register. Thus:
190 * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE");
192 * would produce output:
194 * reg=3<BITTWO,BITONE>
196 * XXX: %D -- Hexdump, takes pointer and separator string:
197 * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
198 * ("%*D", len, ptr, " " -> XX XX XX XX ...
201 kvprintf(char const *fmt, kvprintf_fn_t *func, void *arg, int radix, va_list ap)
203 #define PCHAR(c) {int cc=(c); if (func) (*func)(cc, arg); else *d++ = cc; retval++; }
206 const char *p, *percent, *q;
211 int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
212 int cflag, hflag, jflag, tflag, zflag;
215 int stop = 0, retval = 0;
224 fmt = "(fmt null)\n";
226 if (radix < 2 || radix > 36)
232 while ((ch = (u_char)*fmt++) != '%' || stop) {
238 qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
239 sign = 0; dot = 0; dwidth = 0; upper = 0;
240 cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
241 reswitch: switch (ch = (u_char)*fmt++) {
259 width = va_arg(ap, int);
265 dwidth = va_arg(ap, int);
273 case '1': case '2': case '3': case '4':
274 case '5': case '6': case '7': case '8': case '9':
275 for (n = 0;; ++fmt) {
276 n = n * 10 + ch - '0';
278 if (ch < '0' || ch > '9')
287 num = (u_int)va_arg(ap, int);
288 p = va_arg(ap, char *);
289 for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
297 if (num & (1 << (n - 1))) {
298 PCHAR(tmp ? ',' : '<');
299 for (; (n = *p) > ' '; ++p)
303 for (; *p > ' '; ++p)
310 PCHAR(va_arg(ap, int));
313 up = va_arg(ap, u_char *);
314 p = va_arg(ap, char *);
318 PCHAR(hex2ascii(*up >> 4));
319 PCHAR(hex2ascii(*up & 0x0f));
350 *(va_arg(ap, intmax_t *)) = retval;
352 *(va_arg(ap, quad_t *)) = retval;
354 *(va_arg(ap, long *)) = retval;
356 *(va_arg(ap, size_t *)) = retval;
358 *(va_arg(ap, short *)) = retval;
360 *(va_arg(ap, char *)) = retval;
362 *(va_arg(ap, int *)) = retval;
369 sharpflag = (width == 0);
371 num = (uintptr_t)va_arg(ap, void *);
382 p = va_arg(ap, char *);
388 for (n = 0; n < dwidth && p[n]; n++)
393 if (!ladjust && width > 0)
398 if (ladjust && width > 0)
402 case 'S': /* Assume console can cope with wide chars */
403 for (S = va_arg(ap, uint16_t *); *S != 0; S++)
427 num = va_arg(ap, uintmax_t);
429 num = va_arg(ap, u_quad_t);
431 num = va_arg(ap, ptrdiff_t);
433 num = va_arg(ap, u_long);
435 num = va_arg(ap, size_t);
437 num = (u_short)va_arg(ap, int);
439 num = (u_char)va_arg(ap, int);
441 num = va_arg(ap, u_int);
445 num = va_arg(ap, intmax_t);
447 num = va_arg(ap, quad_t);
449 num = va_arg(ap, ptrdiff_t);
451 num = va_arg(ap, long);
453 num = va_arg(ap, ssize_t);
455 num = (short)va_arg(ap, int);
457 num = (char)va_arg(ap, int);
459 num = va_arg(ap, int);
461 if (sign && (intmax_t)num < 0) {
463 num = -(intmax_t)num;
465 p = ksprintn(nbuf, num, base, &n, upper);
467 if (sharpflag && num != 0) {
476 if (!ladjust && padc == '0')
477 dwidth = width - tmp;
478 width -= tmp + imax(dwidth, n);
485 if (sharpflag && num != 0) {
488 } else if (base == 16) {
505 while (percent < fmt)
508 * Since we ignore a formatting argument it is no
509 * longer safe to obey the remaining formatting
510 * arguments as the arguments will no longer match