]>
git.ipfire.org Git - people/ms/u-boot.git/blob - lib_generic/vsprintf.c
4 * Copyright (C) 1991, 1992 Linus Torvalds
7 /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
9 * Wirzenius wrote this portably, Torvalds fucked it up :-)
13 #include <linux/types.h>
14 #include <linux/string.h>
15 #include <linux/ctype.h>
18 #if !defined (CONFIG_PANIC_HANG)
21 extern int do_reset (cmd_tbl_t
*cmdtp
, int flag
, int argc
, char *argv
[]);
24 unsigned long simple_strtoul(const char *cp
,char **endp
,unsigned int base
)
26 unsigned long result
= 0,value
;
30 if ((*cp
== 'x') && isxdigit(cp
[1])) {
41 while (isxdigit(*cp
) && (value
= isdigit(*cp
) ? *cp
-'0' : (islower(*cp
)
42 ? toupper(*cp
) : *cp
)-'A'+10) < base
) {
43 result
= result
*base
+ value
;
51 long simple_strtol(const char *cp
,char **endp
,unsigned int base
)
54 return -simple_strtoul(cp
+1,endp
,base
);
55 return simple_strtoul(cp
,endp
,base
);
58 /* we use this so that we can do without the ctype library */
59 #define is_digit(c) ((c) >= '0' && (c) <= '9')
61 static int skip_atoi(const char **s
)
66 i
= i
*10 + *((*s
)++) - '0';
70 #define ZEROPAD 1 /* pad with zero */
71 #define SIGN 2 /* unsigned/signed long */
72 #define PLUS 4 /* show plus */
73 #define SPACE 8 /* space if plus */
74 #define LEFT 16 /* left justified */
75 #define SPECIAL 32 /* 0x */
76 #define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
78 #define do_div(n,base) ({ \
80 __res = ((unsigned long) n) % (unsigned) base; \
81 n = ((unsigned long) n) / (unsigned) base; \
84 static char * number(char * str
, long num
, int base
, int size
, int precision
88 const char *digits
="0123456789abcdefghijklmnopqrstuvwxyz";
92 digits
= "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
95 if (base
< 2 || base
> 36)
97 c
= (type
& ZEROPAD
) ? '0' : ' ';
104 } else if (type
& PLUS
) {
107 } else if (type
& SPACE
) {
112 if (type
& SPECIAL
) {
121 else while (num
!= 0)
122 tmp
[i
++] = digits
[do_div(num
,base
)];
126 if (!(type
&(ZEROPAD
+LEFT
)))
131 if (type
& SPECIAL
) {
142 while (i
< precision
--)
151 /* Forward decl. needed for IP address printing stuff... */
152 int sprintf(char * buf
, const char *fmt
, ...);
154 int vsprintf(char *buf
, const char *fmt
, va_list args
)
162 int flags
; /* flags to number() */
164 int field_width
; /* width of output field */
165 int precision
; /* min. # of digits for integers; max
166 number of chars for from string */
167 int qualifier
; /* 'h', 'l', or 'L' for integer fields */
169 for (str
=buf
; *fmt
; ++fmt
) {
178 ++fmt
; /* this also skips first '%' */
180 case '-': flags
|= LEFT
; goto repeat
;
181 case '+': flags
|= PLUS
; goto repeat
;
182 case ' ': flags
|= SPACE
; goto repeat
;
183 case '#': flags
|= SPECIAL
; goto repeat
;
184 case '0': flags
|= ZEROPAD
; goto repeat
;
187 /* get field width */
190 field_width
= skip_atoi(&fmt
);
191 else if (*fmt
== '*') {
193 /* it's the next argument */
194 field_width
= va_arg(args
, int);
195 if (field_width
< 0) {
196 field_width
= -field_width
;
201 /* get the precision */
206 precision
= skip_atoi(&fmt
);
207 else if (*fmt
== '*') {
209 /* it's the next argument */
210 precision
= va_arg(args
, int);
216 /* get the conversion qualifier */
218 if (*fmt
== 'h' || *fmt
== 'l' || *fmt
== 'L') {
229 while (--field_width
> 0)
231 *str
++ = (unsigned char) va_arg(args
, int);
232 while (--field_width
> 0)
237 s
= va_arg(args
, char *);
241 len
= strnlen(s
, precision
);
244 while (len
< field_width
--)
246 for (i
= 0; i
< len
; ++i
)
248 while (len
< field_width
--)
253 if (field_width
== -1) {
254 field_width
= 2*sizeof(void *);
258 (unsigned long) va_arg(args
, void *), 16,
259 field_width
, precision
, flags
);
264 if (qualifier
== 'l') {
265 long * ip
= va_arg(args
, long *);
268 int * ip
= va_arg(args
, int *);
277 /* integer number formats - set up the flags and "break" */
302 if (qualifier
== 'l')
303 num
= va_arg(args
, unsigned long);
304 else if (qualifier
== 'h') {
305 num
= (unsigned short) va_arg(args
, int);
308 } else if (flags
& SIGN
)
309 num
= va_arg(args
, int);
311 num
= va_arg(args
, unsigned int);
312 str
= number(str
, num
, base
, field_width
, precision
, flags
);
318 int sprintf(char * buf
, const char *fmt
, ...)
324 i
=vsprintf(buf
,fmt
,args
);
329 void panic(const char *fmt
, ...)
336 #if defined (CONFIG_PANIC_HANG)
339 udelay (100000); /* allow messages to go out */
340 do_reset (NULL
, 0, 0, NULL
);