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14 * notice, this list of conditions and the following disclaimer.
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16 * notice, this list of conditions and the following disclaimer in the
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19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
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32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
39 * $FreeBSD: src/lib/libstand/printf.c,v 1.14 2010/07/12 15:32:45 jkim Exp $
43 * Standaloneified version of the FreeBSD kernel printf family.
46 #include <sys/types.h>
47 #include <sys/stdint.h>
53 * Note that stdarg.h and the ANSI style va_start macro is used for both
54 * ANSI and traditional C compilers.
63 #define MAXNBUF (sizeof(intmax_t) * CHAR_BIT + 1)
65 static char *ksprintn (char *buf, uintmax_t num, int base, int *len, int upper);
66 static int kvprintf(const char *, void (*)(int, void *), void *, int,
68 static void putchar_wrapper(int, void *);
69 static void snprintf_func(int, void *);
72 putchar_wrapper(int ch, void *arg __unused)
78 printf(const char *fmt, ...)
84 retval = kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
90 vprintf(const char *fmt, va_list ap)
93 kvprintf(fmt, putchar_wrapper, NULL, 10, ap);
97 sprintf(char *buf, const char *cfmt, ...)
103 retval = kvprintf(cfmt, NULL, buf, 10, ap);
110 vsprintf(char *buf, const char *cfmt, va_list ap)
114 retval = kvprintf(cfmt, NULL, buf, 10, ap);
119 snprintf(char *buf, size_t size, const char *cfmt, ...)
125 retval = vsnprintf(buf, size, cfmt, ap);
131 vsnprintf(char *buf, size_t size, const char *cfmt, va_list ap)
133 struct snprintf_arg info;
138 retval = kvprintf(cfmt, snprintf_func, &info, 10, ap);
139 if (info.remain >= 1)
145 snprintf_func(int ch, void *arg)
147 struct snprintf_arg * const info = arg;
149 if (info->remain >= 2) {
156 * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
157 * order; return an optional length and a pointer to the last character
158 * written in the buffer (i.e., the first character of the string).
159 * The buffer pointed to by `nbuf' must have length >= MAXNBUF.
162 ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
169 c = hex2ascii(num % base);
170 *++p = upper ? toupper(c) : c;
171 } while (num /= base);
178 * Scaled down version of printf(3).
180 * Two additional formats:
182 * The format %b is supported to decode error registers.
185 * printf("reg=%b\n", regval, "<base><arg>*");
187 * where <base> is the output base expressed as a control character, e.g.
188 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
189 * the first of which gives the bit number to be inspected (origin 1), and
190 * the next characters (up to a control character, i.e. a character <= 32),
191 * give the name of the register. Thus:
193 * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
195 * would produce output:
197 * reg=3<BITTWO,BITONE>
201 kvprintf(char const *fmt, void (*func)(int, void *), void *arg, int radix,
204 #define PCHAR(c) {int cc=(c); if (func) (*func)(cc, arg); else *d++ = cc; retval++; }
207 const char *p, *percent, *q;
210 int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
211 int cflag, hflag, jflag, tflag, zflag;
214 int stop = 0, retval = 0;
223 fmt = "(fmt null)\n";
225 if (radix < 2 || radix > 36)
231 while ((ch = (u_char)*fmt++) != '%' || stop) {
237 qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
238 sign = 0; dot = 0; dwidth = 0; upper = 0;
239 cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
240 reswitch: switch (ch = (u_char)*fmt++) {
258 width = va_arg(ap, int);
264 dwidth = va_arg(ap, int);
272 case '1': case '2': case '3': case '4':
273 case '5': case '6': case '7': case '8': case '9':
274 for (n = 0;; ++fmt) {
275 n = n * 10 + ch - '0';
277 if (ch < '0' || ch > '9')
286 num = (u_int)va_arg(ap, int);
287 p = va_arg(ap, char *);
288 for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;)
296 if (num & (1 << (n - 1))) {
297 PCHAR(tmp ? ',' : '<');
298 for (; (n = *p) > ' '; ++p)
302 for (; *p > ' '; ++p)
309 PCHAR(va_arg(ap, int));
335 *(va_arg(ap, intmax_t *)) = retval;
337 *(va_arg(ap, quad_t *)) = retval;
339 *(va_arg(ap, long *)) = retval;
341 *(va_arg(ap, size_t *)) = retval;
343 *(va_arg(ap, short *)) = retval;
345 *(va_arg(ap, char *)) = retval;
347 *(va_arg(ap, int *)) = retval;
354 sharpflag = (width == 0);
356 num = (uintptr_t)va_arg(ap, void *);
367 p = va_arg(ap, char *);
373 for (n = 0; n < dwidth && p[n]; n++)
378 if (!ladjust && width > 0)
383 if (ladjust && width > 0)
408 num = va_arg(ap, uintmax_t);
410 num = va_arg(ap, u_quad_t);
412 num = va_arg(ap, ptrdiff_t);
414 num = va_arg(ap, u_long);
416 num = va_arg(ap, size_t);
418 num = (u_short)va_arg(ap, int);
420 num = (u_char)va_arg(ap, int);
422 num = va_arg(ap, u_int);
426 num = va_arg(ap, intmax_t);
428 num = va_arg(ap, quad_t);
430 num = va_arg(ap, ptrdiff_t);
432 num = va_arg(ap, long);
434 num = va_arg(ap, ssize_t);
436 num = (short)va_arg(ap, int);
438 num = (char)va_arg(ap, int);
440 num = va_arg(ap, int);
442 if (sign && (intmax_t)num < 0) {
444 num = -(intmax_t)num;
446 p = ksprintn(nbuf, num, base, &n, upper);
448 if (sharpflag && num != 0) {
457 if (!ladjust && padc == '0')
458 dwidth = width - tmp;
459 width -= tmp + imax(dwidth, n);
466 if (sharpflag && num != 0) {
469 } else if (base == 16) {
486 while (percent < fmt)
489 * Since we ignore an formatting argument it is no
490 * longer safe to obey the remaining formatting
491 * arguments as the arguments will no longer match