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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [powerpc/] [boot/] [stdio.c] - Blame information for rev 3

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/*
 * Copyright (C) Paul Mackerras 1997.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */
#include <stdarg.h>
#include <stddef.h>
#include "string.h"
#include "stdio.h"
#include "ops.h"
 
size_t strnlen(const char * s, size_t count)
{
        const char *sc;
 
        for (sc = s; count-- && *sc != '\0'; ++sc)
                /* nothing */;
        return sc - s;
}
 
extern unsigned int __div64_32(unsigned long long *dividend,
                               unsigned int divisor);
 
/* The unnecessary pointer compare is there
 * to check for type safety (n must be 64bit)
 */
# define do_div(n,base) ({                                              \
        unsigned int __base = (base);                                   \
        unsigned int __rem;                                             \
        (void)(((typeof((n)) *)0) == ((unsigned long long *)0));  \
        if (((n) >> 32) == 0) {                                          \
                __rem = (unsigned int)(n) % __base;                     \
                (n) = (unsigned int)(n) / __base;                       \
        } else                                                          \
                __rem = __div64_32(&(n), __base);                       \
        __rem;                                                          \
 })
 
static int skip_atoi(const char **s)
{
        int i, c;
 
        for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
                i = i*10 + c - '0';
        return i;
}
 
#define ZEROPAD 1               /* pad with zero */
#define SIGN    2               /* unsigned/signed long */
#define PLUS    4               /* show plus */
#define SPACE   8               /* space if plus */
#define LEFT    16              /* left justified */
#define SPECIAL 32              /* 0x */
#define LARGE   64              /* use 'ABCDEF' instead of 'abcdef' */
 
static char * number(char * str, unsigned long long num, int base, int size, int precision, int type)
{
        char c,sign,tmp[66];
        const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
        int i;
 
        if (type & LARGE)
                digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        if (type & LEFT)
                type &= ~ZEROPAD;
        if (base < 2 || base > 36)
                return 0;
        c = (type & ZEROPAD) ? '0' : ' ';
        sign = 0;
        if (type & SIGN) {
                if ((signed long long)num < 0) {
                        sign = '-';
                        num = - (signed long long)num;
                        size--;
                } else if (type & PLUS) {
                        sign = '+';
                        size--;
                } else if (type & SPACE) {
                        sign = ' ';
                        size--;
                }
        }
        if (type & SPECIAL) {
                if (base == 16)
                        size -= 2;
                else if (base == 8)
                        size--;
        }
        i = 0;
        if (num == 0)
                tmp[i++]='0';
        else while (num != 0) {
                tmp[i++] = digits[do_div(num, base)];
        }
        if (i > precision)
                precision = i;
        size -= precision;
        if (!(type&(ZEROPAD+LEFT)))
                while(size-->0)
                        *str++ = ' ';
        if (sign)
                *str++ = sign;
        if (type & SPECIAL) {
                if (base==8)
                        *str++ = '0';
                else if (base==16) {
                        *str++ = '0';
                        *str++ = digits[33];
                }
        }
        if (!(type & LEFT))
                while (size-- > 0)
                        *str++ = c;
        while (i < precision--)
                *str++ = '0';
        while (i-- > 0)
                *str++ = tmp[i];
        while (size-- > 0)
                *str++ = ' ';
        return str;
}
 
int vsprintf(char *buf, const char *fmt, va_list args)
{
        int len;
        unsigned long long num;
        int i, base;
        char * str;
        const char *s;
 
        int flags;              /* flags to number() */
 
        int field_width;        /* width of output field */
        int precision;          /* min. # of digits for integers; max
                                   number of chars for from string */
        int qualifier;          /* 'h', 'l', or 'L' for integer fields */
                                /* 'z' support added 23/7/1999 S.H.    */
                                /* 'z' changed to 'Z' --davidm 1/25/99 */
 
 
        for (str=buf ; *fmt ; ++fmt) {
                if (*fmt != '%') {
                        *str++ = *fmt;
                        continue;
                }
 
                /* process flags */
                flags = 0;
                repeat:
                        ++fmt;          /* this also skips first '%' */
                        switch (*fmt) {
                                case '-': flags |= LEFT; goto repeat;
                                case '+': flags |= PLUS; goto repeat;
                                case ' ': flags |= SPACE; goto repeat;
                                case '#': flags |= SPECIAL; goto repeat;
                                case '0': flags |= ZEROPAD; goto repeat;
                                }
 
                /* get field width */
                field_width = -1;
                if ('0' <= *fmt && *fmt <= '9')
                        field_width = skip_atoi(&fmt);
                else if (*fmt == '*') {
                        ++fmt;
                        /* it's the next argument */
                        field_width = va_arg(args, int);
                        if (field_width < 0) {
                                field_width = -field_width;
                                flags |= LEFT;
                        }
                }
 
                /* get the precision */
                precision = -1;
                if (*fmt == '.') {
                        ++fmt;
                        if ('0' <= *fmt && *fmt <= '9')
                                precision = skip_atoi(&fmt);
                        else if (*fmt == '*') {
                                ++fmt;
                                /* it's the next argument */
                                precision = va_arg(args, int);
                        }
                        if (precision < 0)
                                precision = 0;
                }
 
                /* get the conversion qualifier */
                qualifier = -1;
                if (*fmt == 'l' && *(fmt + 1) == 'l') {
                        qualifier = 'q';
                        fmt += 2;
                } else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
                        || *fmt == 'Z') {
                        qualifier = *fmt;
                        ++fmt;
                }
 
                /* default base */
                base = 10;
 
                switch (*fmt) {
                case 'c':
                        if (!(flags & LEFT))
                                while (--field_width > 0)
                                        *str++ = ' ';
                        *str++ = (unsigned char) va_arg(args, int);
                        while (--field_width > 0)
                                *str++ = ' ';
                        continue;
 
                case 's':
                        s = va_arg(args, char *);
                        if (!s)
                                s = "<NULL>";
 
                        len = strnlen(s, precision);
 
                        if (!(flags & LEFT))
                                while (len < field_width--)
                                        *str++ = ' ';
                        for (i = 0; i < len; ++i)
                                *str++ = *s++;
                        while (len < field_width--)
                                *str++ = ' ';
                        continue;
 
                case 'p':
                        if (field_width == -1) {
                                field_width = 2*sizeof(void *);
                                flags |= ZEROPAD;
                        }
                        str = number(str,
                                (unsigned long) va_arg(args, void *), 16,
                                field_width, precision, flags);
                        continue;
 
 
                case 'n':
                        if (qualifier == 'l') {
                                long * ip = va_arg(args, long *);
                                *ip = (str - buf);
                        } else if (qualifier == 'Z') {
                                size_t * ip = va_arg(args, size_t *);
                                *ip = (str - buf);
                        } else {
                                int * ip = va_arg(args, int *);
                                *ip = (str - buf);
                        }
                        continue;
 
                case '%':
                        *str++ = '%';
                        continue;
 
                /* integer number formats - set up the flags and "break" */
                case 'o':
                        base = 8;
                        break;
 
                case 'X':
                        flags |= LARGE;
                case 'x':
                        base = 16;
                        break;
 
                case 'd':
                case 'i':
                        flags |= SIGN;
                case 'u':
                        break;
 
                default:
                        *str++ = '%';
                        if (*fmt)
                                *str++ = *fmt;
                        else
                                --fmt;
                        continue;
                }
                if (qualifier == 'l') {
                        num = va_arg(args, unsigned long);
                        if (flags & SIGN)
                                num = (signed long) num;
                } else if (qualifier == 'q') {
                        num = va_arg(args, unsigned long long);
                        if (flags & SIGN)
                                num = (signed long long) num;
                } else if (qualifier == 'Z') {
                        num = va_arg(args, size_t);
                } else if (qualifier == 'h') {
                        num = (unsigned short) va_arg(args, int);
                        if (flags & SIGN)
                                num = (signed short) num;
                } else {
                        num = va_arg(args, unsigned int);
                        if (flags & SIGN)
                                num = (signed int) num;
                }
                str = number(str, num, base, field_width, precision, flags);
        }
        *str = '\0';
        return str-buf;
}
 
int sprintf(char * buf, const char *fmt, ...)
{
        va_list args;
        int i;
 
        va_start(args, fmt);
        i=vsprintf(buf,fmt,args);
        va_end(args);
        return i;
}
 
static char sprint_buf[1024];
 
int
printf(const char *fmt, ...)
{
        va_list args;
        int n;
 
        va_start(args, fmt);
        n = vsprintf(sprint_buf, fmt, args);
        va_end(args);
        if (console_ops.write)
                console_ops.write(sprint_buf, n);
        return n;
}

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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [powerpc/] [boot/] [stdio.c] - Blame information for rev 3

Line No.	Rev	Author	Line
1	3	xianfeng	`/*`
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
15			`size_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			`extern 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
42			`static 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
59			`static 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
126			`int 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 == 'l' && (fmt + 1) == 'l') {`
194			`qualifier = 'q';`
195			`fmt += 2;`
196			`} else if (fmt == 'h' \|\| fmt == 'l' \|\| *fmt == 'L'`
197			`\|\| *fmt == 'Z') {`
198			`qualifier = *fmt;`
199			`++fmt;`
200			`}`
201
202			`/* default base */`
203			`base = 10;`
204
205			`switch (*fmt) {`
206			`case 'c':`
207			`if (!(flags & LEFT))`
208			`while (--field_width > 0)`
209			`*str++ = ' ';`
210			`*str++ = (unsigned char) va_arg(args, int);`
211			`while (--field_width > 0)`
212			`*str++ = ' ';`
213			`continue;`
214
215			`case 's':`
216			`s = va_arg(args, char *);`
217			`if (!s)`
218			`s = "<NULL>";`
219
220			`len = strnlen(s, precision);`
221
222			`if (!(flags & LEFT))`
223			`while (len < field_width--)`
224			`*str++ = ' ';`
225			`for (i = 0; i < len; ++i)`
226			`str++ = s++;`
227			`while (len < field_width--)`
228			`*str++ = ' ';`
229			`continue;`
230
231			`case 'p':`
232			`if (field_width == -1) {`
233			`field_width = 2sizeof(void );`
234			`flags \|= ZEROPAD;`
235			`}`
236			`str = number(str,`
237			`(unsigned long) va_arg(args, void *), 16,`
238			`field_width, precision, flags);`
239			`continue;`
240
241
242			`case 'n':`
243			`if (qualifier == 'l') {`
244			`long * ip = va_arg(args, long *);`
245			`*ip = (str - buf);`
246			`} else if (qualifier == 'Z') {`
247			`size_t * ip = va_arg(args, size_t *);`
248			`*ip = (str - buf);`
249			`} else {`
250			`int * ip = va_arg(args, int *);`
251			`*ip = (str - buf);`
252			`}`
253			`continue;`
254
255			`case '%':`
256			`*str++ = '%';`
257			`continue;`
258
259			`/* integer number formats - set up the flags and "break" */`
260			`case 'o':`
261			`base = 8;`
262			`break;`
263
264			`case 'X':`
265			`flags \|= LARGE;`
266			`case 'x':`
267			`base = 16;`
268			`break;`
269
270			`case 'd':`
271			`case 'i':`
272			`flags \|= SIGN;`
273			`case 'u':`
274			`break;`
275
276			`default:`
277			`*str++ = '%';`
278			`if (*fmt)`
279			`str++ = fmt;`
280			`else`
281			`--fmt;`
282			`continue;`
283			`}`
284			`if (qualifier == 'l') {`
285			`num = va_arg(args, unsigned long);`
286			`if (flags & SIGN)`
287			`num = (signed long) num;`
288			`} else if (qualifier == 'q') {`
289			`num = va_arg(args, unsigned long long);`
290			`if (flags & SIGN)`
291			`num = (signed long long) num;`
292			`} else if (qualifier == 'Z') {`
293			`num = va_arg(args, size_t);`
294			`} else if (qualifier == 'h') {`
295			`num = (unsigned short) va_arg(args, int);`
296			`if (flags & SIGN)`
297			`num = (signed short) num;`
298			`} else {`
299			`num = va_arg(args, unsigned int);`
300			`if (flags & SIGN)`
301			`num = (signed int) num;`
302			`}`
303			`str = number(str, num, base, field_width, precision, flags);`
304			`}`
305			`*str = '\0';`
306			`return str-buf;`
307			`}`
308
309			`int sprintf(char * buf, const char *fmt, ...)`
310			`{`
311			`va_list args;`
312			`int i;`
313
314			`va_start(args, fmt);`
315			`i=vsprintf(buf,fmt,args);`
316			`va_end(args);`
317			`return i;`
318			`}`
319
320			`static char sprint_buf[1024];`
321
322			`int`
323			`printf(const char *fmt, ...)`
324			`{`
325			`va_list args;`
326			`int n;`
327
328			`va_start(args, fmt);`
329			`n = vsprintf(sprint_buf, fmt, args);`
330			`va_end(args);`
331			`if (console_ops.write)`
332			`console_ops.write(sprint_buf, n);`
333			`return n;`
334			`}`