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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7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
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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31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 return (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 asprintf(char **buf, const char *cfmt, ...)
128 struct print_buf arg;
133 retval = kvprintf(cfmt, NULL, NULL, 10, ap);
138 arg.size = retval + 1;
139 arg.buf = *buf = malloc(arg.size);
144 retval = kvprintf(cfmt, &snprint_func, &arg, 10, ap);
153 snprintf(char *buf, size_t size, const char *cfmt, ...)
157 struct print_buf arg;
163 retval = kvprintf(cfmt, &snprint_func, &arg, 10, ap);
172 vsnprintf(char *buf, size_t size, const char *cfmt, va_list ap)
174 struct print_buf arg;
180 retval = kvprintf(cfmt, &snprint_func, &arg, 10, ap);
189 vsprintf(char *buf, const char *cfmt, va_list ap)
193 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
200 * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
201 * order; return an optional length and a pointer to the last character
202 * written in the buffer (i.e., the first character of the string).
203 * The buffer pointed to by `nbuf' must have length >= MAXNBUF.
206 ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
213 c = hex2ascii(num % base);
214 *++p = upper ? toupper(c) : c;
215 } while (num /= base);
222 * Scaled down version of printf(3).
224 * Two additional formats:
226 * The format %b is supported to decode error registers.
229 * printf("reg=%b\n", regval, "<base><arg>*");
231 * where <base> is the output base expressed as a control character, e.g.
232 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
233 * the first of which gives the bit number to be inspected (origin 1), and
234 * the next characters (up to a control character, i.e. a character <= 32),
235 * give the name of the register. Thus:
237 * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE");
239 * would produce output:
241 * reg=3<BITTWO,BITONE>
243 * XXX: %D -- Hexdump, takes pointer and separator string:
244 * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
245 * ("%*D", len, ptr, " " -> XX XX XX XX ...
248 kvprintf(char const *fmt, kvprintf_fn_t *func, void *arg, int radix, va_list ap)
255 } else if (d != NULL) { \
263 const char *p, *percent, *q;
268 int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
269 int cflag, hflag, jflag, tflag, zflag;
272 int stop = 0, retval = 0;
282 fmt = "(fmt null)\n";
284 if (radix < 2 || radix > 36)
290 while ((ch = (u_char)*fmt++) != '%' || stop) {
298 qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
299 sign = 0; dot = 0; dwidth = 0; upper = 0;
300 cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
301 reswitch: switch (ch = (u_char)*fmt++) {
319 width = va_arg(ap, int);
325 dwidth = va_arg(ap, int);
333 case '1': case '2': case '3': case '4':
334 case '5': case '6': case '7': case '8': case '9':
335 for (n = 0;; ++fmt) {
336 n = n * 10 + ch - '0';
338 if (ch < '0' || ch > '9')
347 num = (u_int)va_arg(ap, int);
348 p = va_arg(ap, char *);
349 for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
357 if (num & (1 << (n - 1))) {
358 PCHAR(tmp ? ',' : '<');
359 for (; (n = *p) > ' '; ++p)
363 for (; *p > ' '; ++p)
370 PCHAR(va_arg(ap, int));
373 up = va_arg(ap, u_char *);
374 p = va_arg(ap, char *);
378 PCHAR(hex2ascii(*up >> 4));
379 PCHAR(hex2ascii(*up & 0x0f));
410 *(va_arg(ap, intmax_t *)) = retval;
412 *(va_arg(ap, quad_t *)) = retval;
414 *(va_arg(ap, long *)) = retval;
416 *(va_arg(ap, size_t *)) = retval;
418 *(va_arg(ap, short *)) = retval;
420 *(va_arg(ap, char *)) = retval;
422 *(va_arg(ap, int *)) = retval;
429 sharpflag = (width == 0);
431 num = (uintptr_t)va_arg(ap, void *);
442 p = va_arg(ap, char *);
448 for (n = 0; n < dwidth && p[n]; n++)
453 if (!ladjust && width > 0)
458 if (ladjust && width > 0)
462 case 'S': /* Assume console can cope with wide chars */
463 for (S = va_arg(ap, uint16_t *); *S != 0; S++)
487 num = va_arg(ap, uintmax_t);
489 num = va_arg(ap, u_quad_t);
491 num = va_arg(ap, ptrdiff_t);
493 num = va_arg(ap, u_long);
495 num = va_arg(ap, size_t);
497 num = (u_short)va_arg(ap, int);
499 num = (u_char)va_arg(ap, int);
501 num = va_arg(ap, u_int);
505 num = va_arg(ap, intmax_t);
507 num = va_arg(ap, quad_t);
509 num = va_arg(ap, ptrdiff_t);
511 num = va_arg(ap, long);
513 num = va_arg(ap, ssize_t);
515 num = (short)va_arg(ap, int);
517 num = (char)va_arg(ap, int);
519 num = va_arg(ap, int);
521 if (sign && (intmax_t)num < 0) {
523 num = -(intmax_t)num;
525 p = ksprintn(nbuf, num, base, &n, upper);
527 if (sharpflag && num != 0) {
536 if (!ladjust && padc == '0')
537 dwidth = width - tmp;
538 width -= tmp + imax(dwidth, n);
545 if (sharpflag && num != 0) {
548 } else if (base == 16) {
565 while (percent < fmt)
568 * Since we ignore a formatting argument it is no
569 * longer safe to obey the remaining formatting
570 * arguments as the arguments will no longer match