2 * Copyright (C) Paul Mackerras 1997.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
15 size_t strnlen(const char * s, size_t count)
19 for (sc = s; count-- && *sc != '\0'; ++sc)
26 # define do_div(n, base) ({ \
27 unsigned int __base = (base); \
29 __rem = ((unsigned long long)(n)) % __base; \
30 (n) = ((unsigned long long)(n)) / __base; \
36 extern unsigned int __div64_32(unsigned long long *dividend,
37 unsigned int divisor);
39 /* The unnecessary pointer compare is there
40 * to check for type safety (n must be 64bit)
42 # define do_div(n,base) ({ \
43 unsigned int __base = (base); \
45 (void)(((typeof((n)) *)0) == ((unsigned long long *)0)); \
46 if (((n) >> 32) == 0) { \
47 __rem = (unsigned int)(n) % __base; \
48 (n) = (unsigned int)(n) / __base; \
50 __rem = __div64_32(&(n), __base); \
54 #endif /* __powerpc64__ */
56 static int skip_atoi(const char **s)
60 for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
65 #define ZEROPAD 1 /* pad with zero */
66 #define SIGN 2 /* unsigned/signed long */
67 #define PLUS 4 /* show plus */
68 #define SPACE 8 /* space if plus */
69 #define LEFT 16 /* left justified */
70 #define SPECIAL 32 /* 0x */
71 #define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
73 static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
76 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
80 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
83 if (base < 2 || base > 36)
85 c = (type & ZEROPAD) ? '0' : ' ';
88 if ((signed long long)num < 0) {
90 num = - (signed long long)num;
92 } else if (type & PLUS) {
95 } else if (type & SPACE) {
100 if (type & SPECIAL) {
109 else while (num != 0) {
110 tmp[i++] = digits[do_div(num, base)];
115 if (!(type&(ZEROPAD+LEFT)))
120 if (type & SPECIAL) {
131 while (i < precision--)
140 int vsprintf(char *buf, const char *fmt, va_list args)
143 unsigned long long num;
148 int flags; /* flags to number() */
150 int field_width; /* width of output field */
151 int precision; /* min. # of digits for integers; max
152 number of chars for from string */
153 int qualifier; /* 'h', 'l', or 'L' for integer fields */
154 /* 'z' support added 23/7/1999 S.H. */
155 /* 'z' changed to 'Z' --davidm 1/25/99 */
158 for (str=buf ; *fmt ; ++fmt) {
167 ++fmt; /* this also skips first '%' */
169 case '-': flags |= LEFT; goto repeat;
170 case '+': flags |= PLUS; goto repeat;
171 case ' ': flags |= SPACE; goto repeat;
172 case '#': flags |= SPECIAL; goto repeat;
173 case '0': flags |= ZEROPAD; goto repeat;
176 /* get field width */
178 if ('0' <= *fmt && *fmt <= '9')
179 field_width = skip_atoi(&fmt);
180 else if (*fmt == '*') {
182 /* it's the next argument */
183 field_width = va_arg(args, int);
184 if (field_width < 0) {
185 field_width = -field_width;
190 /* get the precision */
194 if ('0' <= *fmt && *fmt <= '9')
195 precision = skip_atoi(&fmt);
196 else if (*fmt == '*') {
198 /* it's the next argument */
199 precision = va_arg(args, int);
205 /* get the conversion qualifier */
207 if (*fmt == 'l' && *(fmt + 1) == 'l') {
210 } else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
222 while (--field_width > 0)
224 *str++ = (unsigned char) va_arg(args, int);
225 while (--field_width > 0)
230 s = va_arg(args, char *);
234 len = strnlen(s, precision);
237 while (len < field_width--)
239 for (i = 0; i < len; ++i)
241 while (len < field_width--)
246 if (field_width == -1) {
247 field_width = 2*sizeof(void *);
251 (unsigned long) va_arg(args, void *), 16,
252 field_width, precision, flags);
257 if (qualifier == 'l') {
258 long * ip = va_arg(args, long *);
260 } else if (qualifier == 'Z') {
261 size_t * ip = va_arg(args, size_t *);
264 int * ip = va_arg(args, int *);
273 /* integer number formats - set up the flags and "break" */
298 if (qualifier == 'l') {
299 num = va_arg(args, unsigned long);
301 num = (signed long) num;
302 } else if (qualifier == 'q') {
303 num = va_arg(args, unsigned long long);
305 num = (signed long long) num;
306 } else if (qualifier == 'Z') {
307 num = va_arg(args, size_t);
308 } else if (qualifier == 'h') {
309 num = (unsigned short) va_arg(args, int);
311 num = (signed short) num;
313 num = va_arg(args, unsigned int);
315 num = (signed int) num;
317 str = number(str, num, base, field_width, precision, flags);
323 int sprintf(char * buf, const char *fmt, ...)
329 i=vsprintf(buf,fmt,args);
334 static char sprint_buf[1024];
337 printf(const char *fmt, ...)
343 n = vsprintf(sprint_buf, fmt, args);
345 if (console_ops.write)
346 console_ops.write(sprint_buf, n);