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-rw-r--r--arch/powerpc/boot/stdio.c325
1 files changed, 325 insertions, 0 deletions
diff --git a/arch/powerpc/boot/stdio.c b/arch/powerpc/boot/stdio.c
new file mode 100644
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+++ b/arch/powerpc/boot/stdio.c
@@ -0,0 +1,325 @@
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 "prom.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
24extern unsigned int __div64_32(unsigned long long *dividend,
25 unsigned int divisor);
26
27/* The unnecessary pointer compare is there
28 * to check for type safety (n must be 64bit)
29 */
30# define do_div(n,base) ({ \
31 unsigned int __base = (base); \
32 unsigned int __rem; \
33 (void)(((typeof((n)) *)0) == ((unsigned long long *)0)); \
34 if (((n) >> 32) == 0) { \
35 __rem = (unsigned int)(n) % __base; \
36 (n) = (unsigned int)(n) / __base; \
37 } else \
38 __rem = __div64_32(&(n), __base); \
39 __rem; \
40 })
41
42static int skip_atoi(const char **s)
43{
44 int i, c;
45
46 for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
47 i = i*10 + c - '0';
48 return i;
49}
50
51#define ZEROPAD 1 /* pad with zero */
52#define SIGN 2 /* unsigned/signed long */
53#define PLUS 4 /* show plus */
54#define SPACE 8 /* space if plus */
55#define LEFT 16 /* left justified */
56#define SPECIAL 32 /* 0x */
57#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
58
59static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
60{
61 char c,sign,tmp[66];
62 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
63 int i;
64
65 if (type & LARGE)
66 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
67 if (type & LEFT)
68 type &= ~ZEROPAD;
69 if (base < 2 || base > 36)
70 return 0;
71 c = (type & ZEROPAD) ? '0' : ' ';
72 sign = 0;
73 if (type & SIGN) {
74 if ((signed long long)num < 0) {
75 sign = '-';
76 num = - (signed long long)num;
77 size--;
78 } else if (type & PLUS) {
79 sign = '+';
80 size--;
81 } else if (type & SPACE) {
82 sign = ' ';
83 size--;
84 }
85 }
86 if (type & SPECIAL) {
87 if (base == 16)
88 size -= 2;
89 else if (base == 8)
90 size--;
91 }
92 i = 0;
93 if (num == 0)
94 tmp[i++]='0';
95 else while (num != 0) {
96 tmp[i++] = digits[do_div(num, base)];
97 }
98 if (i > precision)
99 precision = i;
100 size -= precision;
101 if (!(type&(ZEROPAD+LEFT)))
102 while(size-->0)
103 *str++ = ' ';
104 if (sign)
105 *str++ = sign;
106 if (type & SPECIAL) {
107 if (base==8)
108 *str++ = '0';
109 else if (base==16) {
110 *str++ = '0';
111 *str++ = digits[33];
112 }
113 }
114 if (!(type & LEFT))
115 while (size-- > 0)
116 *str++ = c;
117 while (i < precision--)
118 *str++ = '0';
119 while (i-- > 0)
120 *str++ = tmp[i];
121 while (size-- > 0)
122 *str++ = ' ';
123 return str;
124}
125
126int vsprintf(char *buf, const char *fmt, va_list args)
127{
128 int len;
129 unsigned long long num;
130 int i, base;
131 char * str;
132 const char *s;
133
134 int flags; /* flags to number() */
135
136 int field_width; /* width of output field */
137 int precision; /* min. # of digits for integers; max
138 number of chars for from string */
139 int qualifier; /* 'h', 'l', or 'L' for integer fields */
140 /* 'z' support added 23/7/1999 S.H. */
141 /* 'z' changed to 'Z' --davidm 1/25/99 */
142
143
144 for (str=buf ; *fmt ; ++fmt) {
145 if (*fmt != '%') {
146 *str++ = *fmt;
147 continue;
148 }
149
150 /* process flags */
151 flags = 0;
152 repeat:
153 ++fmt; /* this also skips first '%' */
154 switch (*fmt) {
155 case '-': flags |= LEFT; goto repeat;
156 case '+': flags |= PLUS; goto repeat;
157 case ' ': flags |= SPACE; goto repeat;
158 case '#': flags |= SPECIAL; goto repeat;
159 case '0': flags |= ZEROPAD; goto repeat;
160 }
161
162 /* get field width */
163 field_width = -1;
164 if ('0' <= *fmt && *fmt <= '9')
165 field_width = skip_atoi(&fmt);
166 else if (*fmt == '*') {
167 ++fmt;
168 /* it's the next argument */
169 field_width = va_arg(args, int);
170 if (field_width < 0) {
171 field_width = -field_width;
172 flags |= LEFT;
173 }
174 }
175
176 /* get the precision */
177 precision = -1;
178 if (*fmt == '.') {
179 ++fmt;
180 if ('0' <= *fmt && *fmt <= '9')
181 precision = skip_atoi(&fmt);
182 else if (*fmt == '*') {
183 ++fmt;
184 /* it's the next argument */
185 precision = va_arg(args, int);
186 }
187 if (precision < 0)
188 precision = 0;
189 }
190
191 /* get the conversion qualifier */
192 qualifier = -1;
193 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || *fmt =='Z') {
194 qualifier = *fmt;
195 ++fmt;
196 }
197
198 /* default base */
199 base = 10;
200
201 switch (*fmt) {
202 case 'c':
203 if (!(flags & LEFT))
204 while (--field_width > 0)
205 *str++ = ' ';
206 *str++ = (unsigned char) va_arg(args, int);
207 while (--field_width > 0)
208 *str++ = ' ';
209 continue;
210
211 case 's':
212 s = va_arg(args, char *);
213 if (!s)
214 s = "<NULL>";
215
216 len = strnlen(s, precision);
217
218 if (!(flags & LEFT))
219 while (len < field_width--)
220 *str++ = ' ';
221 for (i = 0; i < len; ++i)
222 *str++ = *s++;
223 while (len < field_width--)
224 *str++ = ' ';
225 continue;
226
227 case 'p':
228 if (field_width == -1) {
229 field_width = 2*sizeof(void *);
230 flags |= ZEROPAD;
231 }
232 str = number(str,
233 (unsigned long) va_arg(args, void *), 16,
234 field_width, precision, flags);
235 continue;
236
237
238 case 'n':
239 if (qualifier == 'l') {
240 long * ip = va_arg(args, long *);
241 *ip = (str - buf);
242 } else if (qualifier == 'Z') {
243 size_t * ip = va_arg(args, size_t *);
244 *ip = (str - buf);
245 } else {
246 int * ip = va_arg(args, int *);
247 *ip = (str - buf);
248 }
249 continue;
250
251 case '%':
252 *str++ = '%';
253 continue;
254
255 /* integer number formats - set up the flags and "break" */
256 case 'o':
257 base = 8;
258 break;
259
260 case 'X':
261 flags |= LARGE;
262 case 'x':
263 base = 16;
264 break;
265
266 case 'd':
267 case 'i':
268 flags |= SIGN;
269 case 'u':
270 break;
271
272 default:
273 *str++ = '%';
274 if (*fmt)
275 *str++ = *fmt;
276 else
277 --fmt;
278 continue;
279 }
280 if (qualifier == 'l') {
281 num = va_arg(args, unsigned long);
282 if (flags & SIGN)
283 num = (signed long) num;
284 } else if (qualifier == 'Z') {
285 num = va_arg(args, size_t);
286 } else if (qualifier == 'h') {
287 num = (unsigned short) va_arg(args, int);
288 if (flags & SIGN)
289 num = (signed short) num;
290 } else {
291 num = va_arg(args, unsigned int);
292 if (flags & SIGN)
293 num = (signed int) num;
294 }
295 str = number(str, num, base, field_width, precision, flags);
296 }
297 *str = '\0';
298 return str-buf;
299}
300
301int sprintf(char * buf, const char *fmt, ...)
302{
303 va_list args;
304 int i;
305
306 va_start(args, fmt);
307 i=vsprintf(buf,fmt,args);
308 va_end(args);
309 return i;
310}
311
312static char sprint_buf[1024];
313
314int
315printf(const char *fmt, ...)
316{
317 va_list args;
318 int n;
319
320 va_start(args, fmt);
321 n = vsprintf(sprint_buf, fmt, args);
322 va_end(args);
323 write(stdout, sprint_buf, n);
324 return n;
325}
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