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
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 * Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/param.h>
44 #include "rtld_printf.h"
46 #define MAXNBUF (sizeof(intmax_t) * NBBY + 1)
48 #define PRINT_METHOD_SNPRINTF 1
49 #define PRINT_METHOD_WRITE 2
61 printf_out(struct snprintf_arg *info)
64 if (info->remain == info->buf_total)
66 write(info->fd, info->buf, info->buf_total - info->remain);
67 info->str = info->buf;
68 info->remain = info->buf_total;
72 snprintf_func(int ch, struct snprintf_arg *const info)
75 switch (info->method) {
76 case PRINT_METHOD_SNPRINTF:
77 if (info->remain >= 2) {
82 case PRINT_METHOD_WRITE:
83 if (info->remain > 0) {
92 static char const hex2ascii_lower[] = "0123456789abcdefghijklmnopqrstuvwxyz";
93 static char const hex2ascii_upper[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
94 #define hex2ascii(hex) (hex2ascii_lower[hex])
95 #define hex2ascii_upper(hex) (hex2ascii_upper[hex])
101 return (a > b ? a : b);
105 ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
112 c = upper ? hex2ascii_upper(num % base) :
113 hex2ascii(num % base);
115 } while (num /= base);
122 kvprintf(char const *fmt, struct snprintf_arg *arg, int radix, va_list ap)
124 #define PCHAR(c) snprintf_func((c), arg)
126 const char *p, *percent, *q;
130 int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
131 int cflag, hflag, jflag, tflag, zflag;
134 int stop = 0, retval = 0;
139 fmt = "(fmt null)\n";
141 if (radix < 2 || radix > 36)
147 while ((ch = (u_char)*fmt++) != '%' || stop) {
153 qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
154 sign = 0; dot = 0; dwidth = 0; upper = 0;
155 cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
156 reswitch: switch (ch = (u_char)*fmt++) {
174 width = va_arg(ap, int);
180 dwidth = va_arg(ap, int);
188 case '1': case '2': case '3': case '4':
189 case '5': case '6': case '7': case '8': case '9':
190 for (n = 0;; ++fmt) {
191 n = n * 10 + ch - '0';
193 if (ch < '0' || ch > '9')
202 num = (u_int)va_arg(ap, int);
203 p = va_arg(ap, char *);
204 for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
212 if (num & (1 << (n - 1))) {
213 PCHAR(tmp ? ',' : '<');
214 for (; (n = *p) > ' '; ++p)
218 for (; *p > ' '; ++p)
225 PCHAR(va_arg(ap, int));
228 up = va_arg(ap, u_char *);
229 p = va_arg(ap, char *);
233 PCHAR(hex2ascii(*up >> 4));
234 PCHAR(hex2ascii(*up & 0x0f));
265 *(va_arg(ap, intmax_t *)) = retval;
267 *(va_arg(ap, quad_t *)) = retval;
269 *(va_arg(ap, long *)) = retval;
271 *(va_arg(ap, size_t *)) = retval;
273 *(va_arg(ap, short *)) = retval;
275 *(va_arg(ap, char *)) = retval;
277 *(va_arg(ap, int *)) = retval;
284 sharpflag = (width == 0);
286 num = (uintptr_t)va_arg(ap, void *);
297 p = va_arg(ap, char *);
303 for (n = 0; n < dwidth && p[n]; n++)
308 if (!ladjust && width > 0)
313 if (ladjust && width > 0)
338 num = va_arg(ap, uintmax_t);
340 num = va_arg(ap, u_quad_t);
342 num = va_arg(ap, ptrdiff_t);
344 num = va_arg(ap, u_long);
346 num = va_arg(ap, size_t);
348 num = (u_short)va_arg(ap, int);
350 num = (u_char)va_arg(ap, int);
352 num = va_arg(ap, u_int);
356 num = va_arg(ap, intmax_t);
358 num = va_arg(ap, quad_t);
360 num = va_arg(ap, ptrdiff_t);
362 num = va_arg(ap, long);
364 num = va_arg(ap, ssize_t);
366 num = (short)va_arg(ap, int);
368 num = (char)va_arg(ap, int);
370 num = va_arg(ap, int);
372 if (sign && (intmax_t)num < 0) {
374 num = -(intmax_t)num;
376 p = ksprintn(nbuf, num, base, &n, upper);
378 if (sharpflag && num != 0) {
387 if (!ladjust && padc == '0')
388 dwidth = width - tmp;
389 width -= tmp + imax(dwidth, n);
396 if (sharpflag && num != 0) {
399 } else if (base == 16) {
416 while (percent < fmt)
419 * Since we ignore an formatting argument it is no
420 * longer safe to obey the remaining formatting
421 * arguments as the arguments will no longer match
432 rtld_snprintf(char *buf, size_t bufsize, const char *fmt, ...)
438 retval = rtld_vsnprintf(buf, bufsize, fmt, ap);
444 rtld_vsnprintf(char *buf, size_t bufsize, const char *fmt, va_list ap)
446 struct snprintf_arg info;
449 info.method = PRINT_METHOD_SNPRINTF;
450 info.buf = info.str = buf;
451 info.buf_total = info.remain = bufsize;
453 retval = kvprintf(fmt, &info, 10, ap);
454 if (info.remain >= 1)
460 rtld_vfdprintf(int fd, const char *fmt, va_list ap)
463 struct snprintf_arg info;
466 info.method = PRINT_METHOD_WRITE;
467 info.buf = info.str = buf;
468 info.buf_total = info.remain = sizeof(buf);
470 retval = kvprintf(fmt, &info, 10, ap);
476 rtld_fdprintf(int fd, const char *fmt, ...)
482 retval = rtld_vfdprintf(fd, fmt, ap);
488 rtld_fdputstr(int fd, const char *str)
491 write(fd, str, strlen(str));
495 rtld_fdputchar(int fd, int c)