/* *  linux/lib/vsprintf.c * *  Copyright (C) 1991, 1992  Linus Torvalds *//* vsprintf.c -- Lars Wirzenius & Linus Torvalds. *//* * Wirzenius wrote this portably, Torvalds fucked it up :-) */#include <stdarg.h>#include <linux/types.h>#include <linux/string.h>#include <linux/ctype.h>/*#include <common.h>#if !defined (CONFIG_PANIC_HANG)#include <command.h>#include <cmd_boot.h>		/* for do_reset() prototype *///#endifunsigned long simple_strtoul(const char *cp,char **endp,unsigned int base){	unsigned long result = 0,value;	if (*cp == '0') {		cp++;		if ((*cp == 'x') && isxdigit(cp[1])) {			base = 16;			cp++;		}		if (!base) {			base = 8;		}	}	if (!base) {		base = 10;	}	while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)	    ? toupper(*cp) : *cp)-'A'+10) < base) {		result = result*base + value;		cp++;	}	if (endp)		*endp = (char *)cp;	return result;}long simple_strtol(const char *cp,char **endp,unsigned int base){	if(*cp=='-')		return -simple_strtoul(cp+1,endp,base);	return simple_strtoul(cp,endp,base);}/* we use this so that we can do without the ctype library */#define is_digit(c)	((c) >= '0' && (c) <= '9')static int skip_atoi(const char **s){	int i=0;	while (is_digit(**s))		i = i*10 + *((*s)++) - '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' */#define do_div(n,base) ({ \int __res; \__res = ((unsigned long) n) % (unsigned) base; \n = ((unsigned long) n) / (unsigned) base; \__res; })static char * number(char * str, 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 (num < 0) {			sign = '-';			num = -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;}/* Forward decl. needed for IP address printing stuff... */int sprintf(char * buf, const char *fmt, ...);int vsprintf(char *buf, const char *fmt, va_list args){	int len;	unsigned 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 */	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 (is_digit(*fmt))			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 (is_digit(*fmt))				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 == 'h' || *fmt == 'l' || *fmt == 'L') {			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 {				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);		else if (qualifier == 'h') {			num = (unsigned short) va_arg(args, int);			if (flags & SIGN)				num = (short) num;		} else if (flags & SIGN)			num = va_arg(args, int);		else			num = va_arg(args, unsigned int);		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;}void panic(const char *fmt, ...){	va_list	args;	va_start(args, fmt);	printf(fmt);	putc('\n');	va_end(args);#if defined (CONFIG_PANIC_HANG)	hang();#else	udelay (100000);	/* allow messages to go out */	do_reset (NULL, 0, 0, NULL);#endif}