1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) Paul Mackerras 1997.
11 size_t strnlen(const char * s, size_t count)
15 for (sc = s; count-- && *sc != '\0'; ++sc)
20 char *strrchr(const char *s, int c)
22 const char *last = NULL;
32 # define do_div(n, base) ({ \
33 unsigned int __base = (base); \
35 __rem = ((unsigned long long)(n)) % __base; \
36 (n) = ((unsigned long long)(n)) / __base; \
42 extern unsigned int __div64_32(unsigned long long *dividend,
43 unsigned int divisor);
45 /* The unnecessary pointer compare is there
46 * to check for type safety (n must be 64bit)
48 # define do_div(n,base) ({ \
49 unsigned int __base = (base); \
51 (void)(((typeof((n)) *)0) == ((unsigned long long *)0)); \
52 if (((n) >> 32) == 0) { \
53 __rem = (unsigned int)(n) % __base; \
54 (n) = (unsigned int)(n) / __base; \
56 __rem = __div64_32(&(n), __base); \
60 #endif /* __powerpc64__ */
62 static int skip_atoi(const char **s)
66 for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
71 #define ZEROPAD 1 /* pad with zero */
72 #define SIGN 2 /* unsigned/signed long */
73 #define PLUS 4 /* show plus */
74 #define SPACE 8 /* space if plus */
75 #define LEFT 16 /* left justified */
76 #define SPECIAL 32 /* 0x */
77 #define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
79 static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
82 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
86 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
89 if (base < 2 || base > 36)
91 c = (type & ZEROPAD) ? '0' : ' ';
94 if ((signed long long)num < 0) {
96 num = - (signed long long)num;
98 } else if (type & PLUS) {
101 } else if (type & SPACE) {
106 if (type & SPECIAL) {
115 else while (num != 0) {
116 tmp[i++] = digits[do_div(num, base)];
121 if (!(type&(ZEROPAD+LEFT)))
126 if (type & SPECIAL) {
137 while (i < precision--)
146 int vsprintf(char *buf, const char *fmt, va_list args)
149 unsigned long long num;
154 int flags; /* flags to number() */
156 int field_width; /* width of output field */
157 int precision; /* min. # of digits for integers; max
158 number of chars for from string */
159 int qualifier; /* 'h', 'l', or 'L' for integer fields */
160 /* 'z' support added 23/7/1999 S.H. */
161 /* 'z' changed to 'Z' --davidm 1/25/99 */
164 for (str=buf ; *fmt ; ++fmt) {
173 ++fmt; /* this also skips first '%' */
175 case '-': flags |= LEFT; goto repeat;
176 case '+': flags |= PLUS; goto repeat;
177 case ' ': flags |= SPACE; goto repeat;
178 case '#': flags |= SPECIAL; goto repeat;
179 case '0': flags |= ZEROPAD; goto repeat;
182 /* get field width */
184 if ('0' <= *fmt && *fmt <= '9')
185 field_width = skip_atoi(&fmt);
186 else if (*fmt == '*') {
188 /* it's the next argument */
189 field_width = va_arg(args, int);
190 if (field_width < 0) {
191 field_width = -field_width;
196 /* get the precision */
200 if ('0' <= *fmt && *fmt <= '9')
201 precision = skip_atoi(&fmt);
202 else if (*fmt == '*') {
204 /* it's the next argument */
205 precision = va_arg(args, int);
211 /* get the conversion qualifier */
213 if (*fmt == 'l' && *(fmt + 1) == 'l') {
216 } else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
228 while (--field_width > 0)
230 *str++ = (unsigned char) va_arg(args, int);
231 while (--field_width > 0)
236 s = va_arg(args, char *);
240 len = strnlen(s, precision);
243 while (len < field_width--)
245 for (i = 0; i < len; ++i)
247 while (len < field_width--)
252 if (field_width == -1) {
253 field_width = 2*sizeof(void *);
257 (unsigned long) va_arg(args, void *), 16,
258 field_width, precision, flags);
263 if (qualifier == 'l') {
264 long * ip = va_arg(args, long *);
266 } else if (qualifier == 'Z') {
267 size_t * ip = va_arg(args, size_t *);
270 int * ip = va_arg(args, int *);
279 /* integer number formats - set up the flags and "break" */
304 if (qualifier == 'l') {
305 num = va_arg(args, unsigned long);
307 num = (signed long) num;
308 } else if (qualifier == 'q') {
309 num = va_arg(args, unsigned long long);
311 num = (signed long long) num;
312 } else if (qualifier == 'Z') {
313 num = va_arg(args, size_t);
314 } else if (qualifier == 'h') {
315 num = (unsigned short) va_arg(args, int);
317 num = (signed short) num;
319 num = va_arg(args, unsigned int);
321 num = (signed int) num;
323 str = number(str, num, base, field_width, precision, flags);
329 int sprintf(char * buf, const char *fmt, ...)
335 i=vsprintf(buf,fmt,args);
340 static char sprint_buf[1024];
343 printf(const char *fmt, ...)
349 n = vsprintf(sprint_buf, fmt, args);
351 if (console_ops.write)
352 console_ops.write(sprint_buf, n);