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9#include <stdarg.h>
10#include <stddef.h>
11#include "string.h"
12#include "stdio.h"
13#include "ops.h"
14
15size_t strnlen(const char * s, size_t count)
16{
17 const char *sc;
18
19 for (sc = s; count-- && *sc != '\0'; ++sc)
20 ;
21 return sc - s;
22}
23
24char *strrchr(const char *s, int c)
25{
26 const char *last = NULL;
27 do {
28 if (*s == (char)c)
29 last = s;
30 } while (*s++);
31 return (char *)last;
32}
33
34#ifdef __powerpc64__
35
36# define do_div(n, base) ({ \
37 unsigned int __base = (base); \
38 unsigned int __rem; \
39 __rem = ((unsigned long long)(n)) % __base; \
40 (n) = ((unsigned long long)(n)) / __base; \
41 __rem; \
42})
43
44#else
45
46extern unsigned int __div64_32(unsigned long long *dividend,
47 unsigned int divisor);
48
49
50
51
52# define do_div(n,base) ({ \
53 unsigned int __base = (base); \
54 unsigned int __rem; \
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; \
59 } else \
60 __rem = __div64_32(&(n), __base); \
61 __rem; \
62 })
63
64#endif
65
66static int skip_atoi(const char **s)
67{
68 int i, c;
69
70 for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
71 i = i*10 + c - '0';
72 return i;
73}
74
75#define ZEROPAD 1
76#define SIGN 2
77#define PLUS 4
78#define SPACE 8
79#define LEFT 16
80#define SPECIAL 32
81#define LARGE 64
82
83static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
84{
85 char c,sign,tmp[66];
86 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
87 int i;
88
89 if (type & LARGE)
90 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
91 if (type & LEFT)
92 type &= ~ZEROPAD;
93 if (base < 2 || base > 36)
94 return 0;
95 c = (type & ZEROPAD) ? '0' : ' ';
96 sign = 0;
97 if (type & SIGN) {
98 if ((signed long long)num < 0) {
99 sign = '-';
100 num = - (signed long long)num;
101 size--;
102 } else if (type & PLUS) {
103 sign = '+';
104 size--;
105 } else if (type & SPACE) {
106 sign = ' ';
107 size--;
108 }
109 }
110 if (type & SPECIAL) {
111 if (base == 16)
112 size -= 2;
113 else if (base == 8)
114 size--;
115 }
116 i = 0;
117 if (num == 0)
118 tmp[i++]='0';
119 else while (num != 0) {
120 tmp[i++] = digits[do_div(num, base)];
121 }
122 if (i > precision)
123 precision = i;
124 size -= precision;
125 if (!(type&(ZEROPAD+LEFT)))
126 while(size-->0)
127 *str++ = ' ';
128 if (sign)
129 *str++ = sign;
130 if (type & SPECIAL) {
131 if (base==8)
132 *str++ = '0';
133 else if (base==16) {
134 *str++ = '0';
135 *str++ = digits[33];
136 }
137 }
138 if (!(type & LEFT))
139 while (size-- > 0)
140 *str++ = c;
141 while (i < precision--)
142 *str++ = '0';
143 while (i-- > 0)
144 *str++ = tmp[i];
145 while (size-- > 0)
146 *str++ = ' ';
147 return str;
148}
149
150int vsprintf(char *buf, const char *fmt, va_list args)
151{
152 int len;
153 unsigned long long num;
154 int i, base;
155 char * str;
156 const char *s;
157
158 int flags;
159
160 int field_width;
161 int precision;
162
163 int qualifier;
164
165
166
167
168 for (str=buf ; *fmt ; ++fmt) {
169 if (*fmt != '%') {
170 *str++ = *fmt;
171 continue;
172 }
173
174
175 flags = 0;
176 repeat:
177 ++fmt;
178 switch (*fmt) {
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;
184 }
185
186
187 field_width = -1;
188 if ('0' <= *fmt && *fmt <= '9')
189 field_width = skip_atoi(&fmt);
190 else if (*fmt == '*') {
191 ++fmt;
192
193 field_width = va_arg(args, int);
194 if (field_width < 0) {
195 field_width = -field_width;
196 flags |= LEFT;
197 }
198 }
199
200
201 precision = -1;
202 if (*fmt == '.') {
203 ++fmt;
204 if ('0' <= *fmt && *fmt <= '9')
205 precision = skip_atoi(&fmt);
206 else if (*fmt == '*') {
207 ++fmt;
208
209 precision = va_arg(args, int);
210 }
211 if (precision < 0)
212 precision = 0;
213 }
214
215
216 qualifier = -1;
217 if (*fmt == 'l' && *(fmt + 1) == 'l') {
218 qualifier = 'q';
219 fmt += 2;
220 } else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
221 || *fmt == 'Z') {
222 qualifier = *fmt;
223 ++fmt;
224 }
225
226
227 base = 10;
228
229 switch (*fmt) {
230 case 'c':
231 if (!(flags & LEFT))
232 while (--field_width > 0)
233 *str++ = ' ';
234 *str++ = (unsigned char) va_arg(args, int);
235 while (--field_width > 0)
236 *str++ = ' ';
237 continue;
238
239 case 's':
240 s = va_arg(args, char *);
241 if (!s)
242 s = "<NULL>";
243
244 len = strnlen(s, precision);
245
246 if (!(flags & LEFT))
247 while (len < field_width--)
248 *str++ = ' ';
249 for (i = 0; i < len; ++i)
250 *str++ = *s++;
251 while (len < field_width--)
252 *str++ = ' ';
253 continue;
254
255 case 'p':
256 if (field_width == -1) {
257 field_width = 2*sizeof(void *);
258 flags |= ZEROPAD;
259 }
260 str = number(str,
261 (unsigned long) va_arg(args, void *), 16,
262 field_width, precision, flags);
263 continue;
264
265
266 case 'n':
267 if (qualifier == 'l') {
268 long * ip = va_arg(args, long *);
269 *ip = (str - buf);
270 } else if (qualifier == 'Z') {
271 size_t * ip = va_arg(args, size_t *);
272 *ip = (str - buf);
273 } else {
274 int * ip = va_arg(args, int *);
275 *ip = (str - buf);
276 }
277 continue;
278
279 case '%':
280 *str++ = '%';
281 continue;
282
283
284 case 'o':
285 base = 8;
286 break;
287
288 case 'X':
289 flags |= LARGE;
290 case 'x':
291 base = 16;
292 break;
293
294 case 'd':
295 case 'i':
296 flags |= SIGN;
297 case 'u':
298 break;
299
300 default:
301 *str++ = '%';
302 if (*fmt)
303 *str++ = *fmt;
304 else
305 --fmt;
306 continue;
307 }
308 if (qualifier == 'l') {
309 num = va_arg(args, unsigned long);
310 if (flags & SIGN)
311 num = (signed long) num;
312 } else if (qualifier == 'q') {
313 num = va_arg(args, unsigned long long);
314 if (flags & SIGN)
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);
320 if (flags & SIGN)
321 num = (signed short) num;
322 } else {
323 num = va_arg(args, unsigned int);
324 if (flags & SIGN)
325 num = (signed int) num;
326 }
327 str = number(str, num, base, field_width, precision, flags);
328 }
329 *str = '\0';
330 return str-buf;
331}
332
333int sprintf(char * buf, const char *fmt, ...)
334{
335 va_list args;
336 int i;
337
338 va_start(args, fmt);
339 i=vsprintf(buf,fmt,args);
340 va_end(args);
341 return i;
342}
343
344static char sprint_buf[1024];
345
346int
347printf(const char *fmt, ...)
348{
349 va_list args;
350 int n;
351
352 va_start(args, fmt);
353 n = vsprintf(sprint_buf, fmt, args);
354 va_end(args);
355 if (console_ops.write)
356 console_ops.write(sprint_buf, n);
357 return n;
358}
359
