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 #ifdef CFG_64BIT_STRTOUL
59 unsigned long long simple_strtoull (const char *cp, char **endp, unsigned int base)
61 unsigned long long result = 0, value;
65 if ((*cp == 'x') && isxdigit (cp[1])) {
76 while (isxdigit (*cp) && (value = isdigit (*cp)
78 : (islower (*cp) ? toupper (*cp) : *cp) - 'A' + 10) < base) {
79 result = result * base + value;
86 #endif /* CFG_64BIT_STRTOUL */
88 /* we use this so that we can do without the ctype library */
89 #define is_digit(c) ((c) >= '0' && (c) <= '9')
91 static int skip_atoi(const char **s)
96 i = i*10 + *((*s)++) - '0';
100 #define ZEROPAD 1 /* pad with zero */
101 #define SIGN 2 /* unsigned/signed long */
102 #define PLUS 4 /* show plus */
103 #define SPACE 8 /* space if plus */
104 #define LEFT 16 /* left justified */
105 #define SPECIAL 32 /* 0x */
106 #define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
108 #ifdef CFG_64BIT_VSPRINTF
109 #define do_div(n,base) ({ \
110 unsigned int __res; \
111 __res = ((unsigned long long) n) % base; \
112 n = ((unsigned long long) n) / base; \
116 #define do_div(n,base) ({ \
118 __res = ((unsigned long) n) % base; \
119 n = ((unsigned long) n) / base; \
124 #ifdef CFG_64BIT_VSPRINTF
125 static char * number(char * str, long long num, unsigned int base, int size, int precision ,int type)
127 static char * number(char * str, long num, unsigned int base, int size, int precision ,int type)
131 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
135 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
138 if (base < 2 || base > 36)
140 c = (type & ZEROPAD) ? '0' : ' ';
147 } else if (type & PLUS) {
150 } else if (type & SPACE) {
155 if (type & SPECIAL) {
164 else while (num != 0)
165 tmp[i++] = digits[do_div(num,base)];
169 if (!(type&(ZEROPAD+LEFT)))
174 if (type & SPECIAL) {
185 while (i < precision--)
194 /* Forward decl. needed for IP address printing stuff... */
195 int sprintf(char * buf, const char *fmt, ...);
197 int vsprintf(char *buf, const char *fmt, va_list args)
200 #ifdef CFG_64BIT_VSPRINTF
201 unsigned long long num;
209 int flags; /* flags to number() */
211 int field_width; /* width of output field */
212 int precision; /* min. # of digits for integers; max
213 number of chars for from string */
214 int qualifier; /* 'h', 'l', or 'q' for integer fields */
216 for (str=buf ; *fmt ; ++fmt) {
225 ++fmt; /* this also skips first '%' */
227 case '-': flags |= LEFT; goto repeat;
228 case '+': flags |= PLUS; goto repeat;
229 case ' ': flags |= SPACE; goto repeat;
230 case '#': flags |= SPECIAL; goto repeat;
231 case '0': flags |= ZEROPAD; goto repeat;
234 /* get field width */
237 field_width = skip_atoi(&fmt);
238 else if (*fmt == '*') {
240 /* it's the next argument */
241 field_width = va_arg(args, int);
242 if (field_width < 0) {
243 field_width = -field_width;
248 /* get the precision */
253 precision = skip_atoi(&fmt);
254 else if (*fmt == '*') {
256 /* it's the next argument */
257 precision = va_arg(args, int);
263 /* get the conversion qualifier */
265 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
266 *fmt == 'Z' || *fmt == 'z' || *fmt == 't' ||
269 if (qualifier == 'l' && *(fmt+1) == 'l') {
282 while (--field_width > 0)
284 *str++ = (unsigned char) va_arg(args, int);
285 while (--field_width > 0)
290 s = va_arg(args, char *);
294 len = strnlen(s, precision);
297 while (len < field_width--)
299 for (i = 0; i < len; ++i)
301 while (len < field_width--)
306 if (field_width == -1) {
307 field_width = 2*sizeof(void *);
311 (unsigned long) va_arg(args, void *), 16,
312 field_width, precision, flags);
317 if (qualifier == 'l') {
318 long * ip = va_arg(args, long *);
321 int * ip = va_arg(args, int *);
330 /* integer number formats - set up the flags and "break" */
355 #ifdef CFG_64BIT_VSPRINTF
356 if (qualifier == 'q') /* "quad" for 64 bit variables */
357 num = va_arg(args, unsigned long long);
360 if (qualifier == 'l') {
361 num = va_arg(args, unsigned long);
362 } else if (qualifier == 'Z' || qualifier == 'z') {
363 num = va_arg(args, size_t);
364 } else if (qualifier == 't') {
365 num = va_arg(args, ptrdiff_t);
366 } else if (qualifier == 'h') {
367 num = (unsigned short) va_arg(args, int);
370 } else if (flags & SIGN)
371 num = va_arg(args, int);
373 num = va_arg(args, unsigned int);
374 str = number(str, num, base, field_width, precision, flags);
380 int sprintf(char * buf, const char *fmt, ...)
386 i=vsprintf(buf,fmt,args);
391 void panic(const char *fmt, ...)
398 #if defined (CONFIG_PANIC_HANG)
401 udelay (100000); /* allow messages to go out */
402 do_reset (NULL, 0, 0, NULL);