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 #define do_div(n,base) ({ \
110 __res = ((unsigned long) n) % (unsigned) base; \
111 n = ((unsigned long) n) / (unsigned) base; \
115 #ifdef CFG_64BIT_VSPRINTF
116 static char * number(char * str, long long num, int base, int size, int precision ,int type)
118 static char * number(char * str, long num, int base, int size, int precision ,int type)
122 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
126 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
129 if (base < 2 || base > 36)
131 c = (type & ZEROPAD) ? '0' : ' ';
138 } else if (type & PLUS) {
141 } else if (type & SPACE) {
146 if (type & SPECIAL) {
155 else while (num != 0)
156 tmp[i++] = digits[do_div(num,base)];
160 if (!(type&(ZEROPAD+LEFT)))
165 if (type & SPECIAL) {
176 while (i < precision--)
185 /* Forward decl. needed for IP address printing stuff... */
186 int sprintf(char * buf, const char *fmt, ...);
188 int vsprintf(char *buf, const char *fmt, va_list args)
191 #ifdef CFG_64BIT_VSPRINTF
192 unsigned long long num;
200 int flags; /* flags to number() */
202 int field_width; /* width of output field */
203 int precision; /* min. # of digits for integers; max
204 number of chars for from string */
205 int qualifier; /* 'h', 'l', or 'q' for integer fields */
207 for (str=buf ; *fmt ; ++fmt) {
216 ++fmt; /* this also skips first '%' */
218 case '-': flags |= LEFT; goto repeat;
219 case '+': flags |= PLUS; goto repeat;
220 case ' ': flags |= SPACE; goto repeat;
221 case '#': flags |= SPECIAL; goto repeat;
222 case '0': flags |= ZEROPAD; goto repeat;
225 /* get field width */
228 field_width = skip_atoi(&fmt);
229 else if (*fmt == '*') {
231 /* it's the next argument */
232 field_width = va_arg(args, int);
233 if (field_width < 0) {
234 field_width = -field_width;
239 /* get the precision */
244 precision = skip_atoi(&fmt);
245 else if (*fmt == '*') {
247 /* it's the next argument */
248 precision = va_arg(args, int);
254 /* get the conversion qualifier */
256 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'q') {
267 while (--field_width > 0)
269 *str++ = (unsigned char) va_arg(args, int);
270 while (--field_width > 0)
275 s = va_arg(args, char *);
279 len = strnlen(s, precision);
282 while (len < field_width--)
284 for (i = 0; i < len; ++i)
286 while (len < field_width--)
291 if (field_width == -1) {
292 field_width = 2*sizeof(void *);
296 (unsigned long) va_arg(args, void *), 16,
297 field_width, precision, flags);
302 if (qualifier == 'l') {
303 long * ip = va_arg(args, long *);
306 int * ip = va_arg(args, int *);
315 /* integer number formats - set up the flags and "break" */
340 #ifdef CFG_64BIT_VSPRINTF
341 if (qualifier == 'q') /* "quad" for 64 bit variables */
342 num = va_arg(args, unsigned long long);
345 if (qualifier == 'l')
346 num = va_arg(args, unsigned long);
347 else if (qualifier == 'h') {
348 num = (unsigned short) va_arg(args, int);
351 } else if (flags & SIGN)
352 num = va_arg(args, int);
354 num = va_arg(args, unsigned int);
355 str = number(str, num, base, field_width, precision, flags);
361 int sprintf(char * buf, const char *fmt, ...)
367 i=vsprintf(buf,fmt,args);
372 void panic(const char *fmt, ...)
379 #if defined (CONFIG_PANIC_HANG)
382 udelay (100000); /* allow messages to go out */
383 do_reset (NULL, 0, 0, NULL);