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38 * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
45 * Standaloneified version of the FreeBSD kernel printf family.
48 #include <sys/types.h>
54 * Note that stdarg.h and the ANSI style va_start macro is used for both
55 * ANSI and traditional C compilers.
57 #include <machine/stdarg.h>
59 static char *ksprintn (u_long num, int base, int *len);
60 static int kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap);
63 printf(const char *fmt, ...)
69 retval = kvprintf(fmt, putchar, NULL, 10, ap);
75 vprintf(const char *fmt, va_list ap)
78 kvprintf(fmt, putchar, NULL, 10, ap);
82 sprintf(char *buf, const char *cfmt, ...)
88 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
95 vsprintf(char *buf, const char *cfmt, va_list ap)
99 retval = kvprintf(cfmt, NULL, (void *)buf, 10, ap);
104 * Put a number (base <= 16) in a buffer in reverse order; return an
105 * optional length and a pointer to the NULL terminated (preceded?)
109 ksprintn(ul, base, lenp)
112 { /* A long in base 8, plus NULL. */
113 static char buf[sizeof(long) * CHAR_BIT / 3 + 2];
118 *++p = hex2ascii(ul % base);
119 } while (ul /= base);
126 * Scaled down version of printf(3).
128 * Two additional formats:
130 * The format %b is supported to decode error registers.
133 * printf("reg=%b\n", regval, "<base><arg>*");
135 * where <base> is the output base expressed as a control character, e.g.
136 * \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
137 * the first of which gives the bit number to be inspected (origin 1), and
138 * the next characters (up to a control character, i.e. a character <= 32),
139 * give the name of the register. Thus:
141 * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n");
143 * would produce output:
145 * reg=3<BITTWO,BITONE>
147 * XXX: %D -- Hexdump, takes pointer and separator string:
148 * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX
149 * ("%*D", len, ptr, " " -> XX XX XX XX ...
152 kvprintf(char const *fmt, void (*func)(int), void *arg, int radix, va_list ap)
154 #define PCHAR(c) {int cc=(c); if (func) (*func)(cc); else *d++ = cc; retval++; }
159 int base, lflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
170 fmt = "(fmt null)\n";
172 if (radix < 2 || radix > 36)
178 while ((ch = (u_char)*fmt++) != '%') {
183 lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
184 sign = 0; dot = 0; dwidth = 0;
185 reswitch: switch (ch = (u_char)*fmt++) {
203 width = va_arg(ap, int);
209 dwidth = va_arg(ap, int);
217 case '1': case '2': case '3': case '4':
218 case '5': case '6': case '7': case '8': case '9':
219 for (n = 0;; ++fmt) {
220 n = n * 10 + ch - '0';
222 if (ch < '0' || ch > '9')
231 ul = va_arg(ap, int);
232 p = va_arg(ap, char *);
233 for (q = ksprintn(ul, *p++, NULL); *q;)
241 if (ul & (1 << (n - 1))) {
242 PCHAR(tmp ? ',' : '<');
243 for (; (n = *p) > ' '; ++p)
247 for (; *p > ' '; ++p)
254 PCHAR(va_arg(ap, int));
257 up = va_arg(ap, u_char *);
258 p = va_arg(ap, char *);
262 PCHAR(hex2ascii(*up >> 4));
263 PCHAR(hex2ascii(*up & 0x0f));
271 ul = lflag ? va_arg(ap, long) : va_arg(ap, int);
279 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
283 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
287 ul = (u_long)va_arg(ap, void *);
292 p = va_arg(ap, char *);
298 for (n = 0; n < dwidth && p[n]; n++)
303 if (!ladjust && width > 0)
308 if (ladjust && width > 0)
313 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
317 ul = lflag ? va_arg(ap, u_long) : va_arg(ap, u_int);
319 number: if (sign && (long)ul < 0L) {
323 p = ksprintn(ul, base, &tmp);
324 if (sharpflag && ul != 0) {
333 if (!ladjust && width && (width -= tmp) > 0)
338 if (sharpflag && ul != 0) {
341 } else if (base == 16) {
350 if (ladjust && width && (width -= tmp) > 0)