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)
24 char *strrchr(const char *s, int c)
26 const char *last = NULL;
36 # define do_div(n, base) ({ \
37 unsigned int __base = (base); \
39 __rem = ((unsigned long long)(n)) % __base; \
40 (n) = ((unsigned long long)(n)) / __base; \
46 extern unsigned int __div64_32(unsigned long long *dividend,
47 unsigned int divisor);
49 /* The unnecessary pointer compare is there
50 * to check for type safety (n must be 64bit)
52 # define do_div(n,base) ({ \
53 unsigned int __base = (base); \
55 (void)(((typeof((n)) *)0) == ((unsigned long long *)0)); \
56 if (((n) >> 32) == 0) { \
57 __rem = (unsigned int)(n) % __base; \
58 (n) = (unsigned int)(n) / __base; \
60 __rem = __div64_32(&(n), __base); \
64 #endif /* __powerpc64__ */
66 static int skip_atoi(const char **s)
70 for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
75 #define ZEROPAD 1 /* pad with zero */
76 #define SIGN 2 /* unsigned/signed long */
77 #define PLUS 4 /* show plus */
78 #define SPACE 8 /* space if plus */
79 #define LEFT 16 /* left justified */
80 #define SPECIAL 32 /* 0x */
81 #define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
83 static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
86 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
90 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
93 if (base < 2 || base > 36)
95 c = (type & ZEROPAD) ? '0' : ' ';
98 if ((signed long long)num < 0) {
100 num = - (signed long long)num;
102 } else if (type & PLUS) {
105 } else if (type & SPACE) {
110 if (type & SPECIAL) {
119 else while (num != 0) {
120 tmp[i++] = digits[do_div(num, base)];
125 if (!(type&(ZEROPAD+LEFT)))
130 if (type & SPECIAL) {
141 while (i < precision--)
150 int vsprintf(char *buf, const char *fmt, va_list args)
153 unsigned long long num;
158 int flags; /* flags to number() */
160 int field_width; /* width of output field */
161 int precision; /* min. # of digits for integers; max
162 number of chars for from string */
163 int qualifier; /* 'h', 'l', or 'L' for integer fields */
164 /* 'z' support added 23/7/1999 S.H. */
165 /* 'z' changed to 'Z' --davidm 1/25/99 */
168 for (str=buf ; *fmt ; ++fmt) {
177 ++fmt; /* this also skips first '%' */
179 case '-': flags |= LEFT; goto repeat;
180 case '+': flags |= PLUS; goto repeat;
181 case ' ': flags |= SPACE; goto repeat;
182 case '#': flags |= SPECIAL; goto repeat;
183 case '0': flags |= ZEROPAD; goto repeat;
186 /* get field width */
188 if ('0' <= *fmt && *fmt <= '9')
189 field_width = skip_atoi(&fmt);
190 else if (*fmt == '*') {
192 /* it's the next argument */
193 field_width = va_arg(args, int);
194 if (field_width < 0) {
195 field_width = -field_width;
200 /* get the precision */
204 if ('0' <= *fmt && *fmt <= '9')
205 precision = skip_atoi(&fmt);
206 else if (*fmt == '*') {
208 /* it's the next argument */
209 precision = va_arg(args, int);
215 /* get the conversion qualifier */
217 if (*fmt == 'l' && *(fmt + 1) == 'l') {
220 } else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
232 while (--field_width > 0)
234 *str++ = (unsigned char) va_arg(args, int);
235 while (--field_width > 0)
240 s = va_arg(args, char *);
244 len = strnlen(s, precision);
247 while (len < field_width--)
249 for (i = 0; i < len; ++i)
251 while (len < field_width--)
256 if (field_width == -1) {
257 field_width = 2*sizeof(void *);
261 (unsigned long) va_arg(args, void *), 16,
262 field_width, precision, flags);
267 if (qualifier == 'l') {
268 long * ip = va_arg(args, long *);
270 } else if (qualifier == 'Z') {
271 size_t * ip = va_arg(args, size_t *);
274 int * ip = va_arg(args, int *);
283 /* integer number formats - set up the flags and "break" */
308 if (qualifier == 'l') {
309 num = va_arg(args, unsigned long);
311 num = (signed long) num;
312 } else if (qualifier == 'q') {
313 num = va_arg(args, unsigned long long);
315 num = (signed long long) num;
316 } else if (qualifier == 'Z') {
317 num = va_arg(args, size_t);
318 } else if (qualifier == 'h') {
319 num = (unsigned short) va_arg(args, int);
321 num = (signed short) num;
323 num = va_arg(args, unsigned int);
325 num = (signed int) num;
327 str = number(str, num, base, field_width, precision, flags);
333 int sprintf(char * buf, const char *fmt, ...)
339 i=vsprintf(buf,fmt,args);
344 static char sprint_buf[1024];
347 printf(const char *fmt, ...)
353 n = vsprintf(sprint_buf, fmt, args);
355 if (console_ops.write)
356 console_ops.write(sprint_buf, n);