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1/*
2 * Copyright (C) Paul Mackerras 1997.
3 *
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.
8 */
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 /* nothing */;
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/* The unnecessary pointer compare is there
50 * to check for type safety (n must be 64bit)
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 /* __powerpc64__ */
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 /* 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' */
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; /* flags to number() */
159
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 */
166
167
168 for (str=buf ; *fmt ; ++fmt) {
169 if (*fmt != '%') {
170 *str++ = *fmt;
171 continue;
172 }
173
174 /* process flags */
175 flags = 0;
176 repeat:
177 ++fmt; /* this also skips first '%' */
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 /* get field width */
187 field_width = -1;
188 if ('0' <= *fmt && *fmt <= '9')
189 field_width = skip_atoi(&fmt);
190 else if (*fmt == '*') {
191 ++fmt;
192 /* it's the next argument */
193 field_width = va_arg(args, int);
194 if (field_width < 0) {
195 field_width = -field_width;
196 flags |= LEFT;
197 }
198 }
199
200 /* get the precision */
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 /* it's the next argument */
209 precision = va_arg(args, int);
210 }
211 if (precision < 0)
212 precision = 0;
213 }
214
215 /* get the conversion qualifier */
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 /* default base */
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 /* integer number formats - set up the flags and "break" */
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}
1/*
2 * Copyright (C) Paul Mackerras 1997.
3 *
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.
8 */
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 /* nothing */;
21 return sc - s;
22}
23
24#ifdef __powerpc64__
25
26# define do_div(n, base) ({ \
27 unsigned int __base = (base); \
28 unsigned int __rem; \
29 __rem = ((unsigned long long)(n)) % __base; \
30 (n) = ((unsigned long long)(n)) / __base; \
31 __rem; \
32})
33
34#else
35
36extern unsigned int __div64_32(unsigned long long *dividend,
37 unsigned int divisor);
38
39/* The unnecessary pointer compare is there
40 * to check for type safety (n must be 64bit)
41 */
42# define do_div(n,base) ({ \
43 unsigned int __base = (base); \
44 unsigned int __rem; \
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; \
49 } else \
50 __rem = __div64_32(&(n), __base); \
51 __rem; \
52 })
53
54#endif /* __powerpc64__ */
55
56static int skip_atoi(const char **s)
57{
58 int i, c;
59
60 for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
61 i = i*10 + c - '0';
62 return i;
63}
64
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' */
72
73static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
74{
75 char c,sign,tmp[66];
76 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
77 int i;
78
79 if (type & LARGE)
80 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
81 if (type & LEFT)
82 type &= ~ZEROPAD;
83 if (base < 2 || base > 36)
84 return 0;
85 c = (type & ZEROPAD) ? '0' : ' ';
86 sign = 0;
87 if (type & SIGN) {
88 if ((signed long long)num < 0) {
89 sign = '-';
90 num = - (signed long long)num;
91 size--;
92 } else if (type & PLUS) {
93 sign = '+';
94 size--;
95 } else if (type & SPACE) {
96 sign = ' ';
97 size--;
98 }
99 }
100 if (type & SPECIAL) {
101 if (base == 16)
102 size -= 2;
103 else if (base == 8)
104 size--;
105 }
106 i = 0;
107 if (num == 0)
108 tmp[i++]='0';
109 else while (num != 0) {
110 tmp[i++] = digits[do_div(num, base)];
111 }
112 if (i > precision)
113 precision = i;
114 size -= precision;
115 if (!(type&(ZEROPAD+LEFT)))
116 while(size-->0)
117 *str++ = ' ';
118 if (sign)
119 *str++ = sign;
120 if (type & SPECIAL) {
121 if (base==8)
122 *str++ = '0';
123 else if (base==16) {
124 *str++ = '0';
125 *str++ = digits[33];
126 }
127 }
128 if (!(type & LEFT))
129 while (size-- > 0)
130 *str++ = c;
131 while (i < precision--)
132 *str++ = '0';
133 while (i-- > 0)
134 *str++ = tmp[i];
135 while (size-- > 0)
136 *str++ = ' ';
137 return str;
138}
139
140int vsprintf(char *buf, const char *fmt, va_list args)
141{
142 int len;
143 unsigned long long num;
144 int i, base;
145 char * str;
146 const char *s;
147
148 int flags; /* flags to number() */
149
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 */
156
157
158 for (str=buf ; *fmt ; ++fmt) {
159 if (*fmt != '%') {
160 *str++ = *fmt;
161 continue;
162 }
163
164 /* process flags */
165 flags = 0;
166 repeat:
167 ++fmt; /* this also skips first '%' */
168 switch (*fmt) {
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;
174 }
175
176 /* get field width */
177 field_width = -1;
178 if ('0' <= *fmt && *fmt <= '9')
179 field_width = skip_atoi(&fmt);
180 else if (*fmt == '*') {
181 ++fmt;
182 /* it's the next argument */
183 field_width = va_arg(args, int);
184 if (field_width < 0) {
185 field_width = -field_width;
186 flags |= LEFT;
187 }
188 }
189
190 /* get the precision */
191 precision = -1;
192 if (*fmt == '.') {
193 ++fmt;
194 if ('0' <= *fmt && *fmt <= '9')
195 precision = skip_atoi(&fmt);
196 else if (*fmt == '*') {
197 ++fmt;
198 /* it's the next argument */
199 precision = va_arg(args, int);
200 }
201 if (precision < 0)
202 precision = 0;
203 }
204
205 /* get the conversion qualifier */
206 qualifier = -1;
207 if (*fmt == 'l' && *(fmt + 1) == 'l') {
208 qualifier = 'q';
209 fmt += 2;
210 } else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
211 || *fmt == 'Z') {
212 qualifier = *fmt;
213 ++fmt;
214 }
215
216 /* default base */
217 base = 10;
218
219 switch (*fmt) {
220 case 'c':
221 if (!(flags & LEFT))
222 while (--field_width > 0)
223 *str++ = ' ';
224 *str++ = (unsigned char) va_arg(args, int);
225 while (--field_width > 0)
226 *str++ = ' ';
227 continue;
228
229 case 's':
230 s = va_arg(args, char *);
231 if (!s)
232 s = "<NULL>";
233
234 len = strnlen(s, precision);
235
236 if (!(flags & LEFT))
237 while (len < field_width--)
238 *str++ = ' ';
239 for (i = 0; i < len; ++i)
240 *str++ = *s++;
241 while (len < field_width--)
242 *str++ = ' ';
243 continue;
244
245 case 'p':
246 if (field_width == -1) {
247 field_width = 2*sizeof(void *);
248 flags |= ZEROPAD;
249 }
250 str = number(str,
251 (unsigned long) va_arg(args, void *), 16,
252 field_width, precision, flags);
253 continue;
254
255
256 case 'n':
257 if (qualifier == 'l') {
258 long * ip = va_arg(args, long *);
259 *ip = (str - buf);
260 } else if (qualifier == 'Z') {
261 size_t * ip = va_arg(args, size_t *);
262 *ip = (str - buf);
263 } else {
264 int * ip = va_arg(args, int *);
265 *ip = (str - buf);
266 }
267 continue;
268
269 case '%':
270 *str++ = '%';
271 continue;
272
273 /* integer number formats - set up the flags and "break" */
274 case 'o':
275 base = 8;
276 break;
277
278 case 'X':
279 flags |= LARGE;
280 case 'x':
281 base = 16;
282 break;
283
284 case 'd':
285 case 'i':
286 flags |= SIGN;
287 case 'u':
288 break;
289
290 default:
291 *str++ = '%';
292 if (*fmt)
293 *str++ = *fmt;
294 else
295 --fmt;
296 continue;
297 }
298 if (qualifier == 'l') {
299 num = va_arg(args, unsigned long);
300 if (flags & SIGN)
301 num = (signed long) num;
302 } else if (qualifier == 'q') {
303 num = va_arg(args, unsigned long long);
304 if (flags & SIGN)
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);
310 if (flags & SIGN)
311 num = (signed short) num;
312 } else {
313 num = va_arg(args, unsigned int);
314 if (flags & SIGN)
315 num = (signed int) num;
316 }
317 str = number(str, num, base, field_width, precision, flags);
318 }
319 *str = '\0';
320 return str-buf;
321}
322
323int sprintf(char * buf, const char *fmt, ...)
324{
325 va_list args;
326 int i;
327
328 va_start(args, fmt);
329 i=vsprintf(buf,fmt,args);
330 va_end(args);
331 return i;
332}
333
334static char sprint_buf[1024];
335
336int
337printf(const char *fmt, ...)
338{
339 va_list args;
340 int n;
341
342 va_start(args, fmt);
343 n = vsprintf(sprint_buf, fmt, args);
344 va_end(args);
345 if (console_ops.write)
346 console_ops.write(sprint_buf, n);
347 return n;
348}