| 1 |
62 |
marcus.erl |
/*
|
| 2 |
|
|
* linux/lib/vsprintf.c
|
| 3 |
|
|
*
|
| 4 |
|
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
| 5 |
|
|
*/
|
| 6 |
|
|
|
| 7 |
|
|
/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
|
| 8 |
|
|
/*
|
| 9 |
|
|
* Wirzenius wrote this portably, Torvalds fucked it up :-)
|
| 10 |
|
|
*/
|
| 11 |
|
|
|
| 12 |
|
|
/*
|
| 13 |
|
|
* Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
|
| 14 |
|
|
* - changed to provide snprintf and vsnprintf functions
|
| 15 |
|
|
* So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de>
|
| 16 |
|
|
* - scnprintf and vscnprintf
|
| 17 |
|
|
*/
|
| 18 |
|
|
|
| 19 |
|
|
#include <stdarg.h>
|
| 20 |
|
|
#include <linux/module.h>
|
| 21 |
|
|
#include <linux/types.h>
|
| 22 |
|
|
#include <linux/string.h>
|
| 23 |
|
|
#include <linux/ctype.h>
|
| 24 |
|
|
#include <linux/kernel.h>
|
| 25 |
|
|
|
| 26 |
|
|
#include <asm/page.h> /* for PAGE_SIZE */
|
| 27 |
|
|
#include <asm/div64.h>
|
| 28 |
|
|
|
| 29 |
|
|
/**
|
| 30 |
|
|
* simple_strtoul - convert a string to an unsigned long
|
| 31 |
|
|
* @cp: The start of the string
|
| 32 |
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
| 33 |
|
|
* @base: The number base to use
|
| 34 |
|
|
*/
|
| 35 |
|
|
unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
|
| 36 |
|
|
{
|
| 37 |
|
|
unsigned long result = 0,value;
|
| 38 |
|
|
|
| 39 |
|
|
if (!base) {
|
| 40 |
|
|
base = 10;
|
| 41 |
|
|
if (*cp == '0') {
|
| 42 |
|
|
base = 8;
|
| 43 |
|
|
cp++;
|
| 44 |
|
|
if ((toupper(*cp) == 'X') && isxdigit(cp[1])) {
|
| 45 |
|
|
cp++;
|
| 46 |
|
|
base = 16;
|
| 47 |
|
|
}
|
| 48 |
|
|
}
|
| 49 |
|
|
} else if (base == 16) {
|
| 50 |
|
|
if (cp[0] == '0' && toupper(cp[1]) == 'X')
|
| 51 |
|
|
cp += 2;
|
| 52 |
|
|
}
|
| 53 |
|
|
while (isxdigit(*cp) &&
|
| 54 |
|
|
(value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
|
| 55 |
|
|
result = result*base + value;
|
| 56 |
|
|
cp++;
|
| 57 |
|
|
}
|
| 58 |
|
|
if (endp)
|
| 59 |
|
|
*endp = (char *)cp;
|
| 60 |
|
|
return result;
|
| 61 |
|
|
}
|
| 62 |
|
|
|
| 63 |
|
|
EXPORT_SYMBOL(simple_strtoul);
|
| 64 |
|
|
|
| 65 |
|
|
/**
|
| 66 |
|
|
* simple_strtol - convert a string to a signed long
|
| 67 |
|
|
* @cp: The start of the string
|
| 68 |
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
| 69 |
|
|
* @base: The number base to use
|
| 70 |
|
|
*/
|
| 71 |
|
|
long simple_strtol(const char *cp,char **endp,unsigned int base)
|
| 72 |
|
|
{
|
| 73 |
|
|
if(*cp=='-')
|
| 74 |
|
|
return -simple_strtoul(cp+1,endp,base);
|
| 75 |
|
|
return simple_strtoul(cp,endp,base);
|
| 76 |
|
|
}
|
| 77 |
|
|
|
| 78 |
|
|
EXPORT_SYMBOL(simple_strtol);
|
| 79 |
|
|
|
| 80 |
|
|
/**
|
| 81 |
|
|
* simple_strtoull - convert a string to an unsigned long long
|
| 82 |
|
|
* @cp: The start of the string
|
| 83 |
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
| 84 |
|
|
* @base: The number base to use
|
| 85 |
|
|
*/
|
| 86 |
|
|
unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base)
|
| 87 |
|
|
{
|
| 88 |
|
|
unsigned long long result = 0,value;
|
| 89 |
|
|
|
| 90 |
|
|
if (!base) {
|
| 91 |
|
|
base = 10;
|
| 92 |
|
|
if (*cp == '0') {
|
| 93 |
|
|
base = 8;
|
| 94 |
|
|
cp++;
|
| 95 |
|
|
if ((toupper(*cp) == 'X') && isxdigit(cp[1])) {
|
| 96 |
|
|
cp++;
|
| 97 |
|
|
base = 16;
|
| 98 |
|
|
}
|
| 99 |
|
|
}
|
| 100 |
|
|
} else if (base == 16) {
|
| 101 |
|
|
if (cp[0] == '0' && toupper(cp[1]) == 'X')
|
| 102 |
|
|
cp += 2;
|
| 103 |
|
|
}
|
| 104 |
|
|
while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
|
| 105 |
|
|
? toupper(*cp) : *cp)-'A'+10) < base) {
|
| 106 |
|
|
result = result*base + value;
|
| 107 |
|
|
cp++;
|
| 108 |
|
|
}
|
| 109 |
|
|
if (endp)
|
| 110 |
|
|
*endp = (char *)cp;
|
| 111 |
|
|
return result;
|
| 112 |
|
|
}
|
| 113 |
|
|
|
| 114 |
|
|
EXPORT_SYMBOL(simple_strtoull);
|
| 115 |
|
|
|
| 116 |
|
|
/**
|
| 117 |
|
|
* simple_strtoll - convert a string to a signed long long
|
| 118 |
|
|
* @cp: The start of the string
|
| 119 |
|
|
* @endp: A pointer to the end of the parsed string will be placed here
|
| 120 |
|
|
* @base: The number base to use
|
| 121 |
|
|
*/
|
| 122 |
|
|
long long simple_strtoll(const char *cp,char **endp,unsigned int base)
|
| 123 |
|
|
{
|
| 124 |
|
|
if(*cp=='-')
|
| 125 |
|
|
return -simple_strtoull(cp+1,endp,base);
|
| 126 |
|
|
return simple_strtoull(cp,endp,base);
|
| 127 |
|
|
}
|
| 128 |
|
|
|
| 129 |
|
|
static int skip_atoi(const char **s)
|
| 130 |
|
|
{
|
| 131 |
|
|
int i=0;
|
| 132 |
|
|
|
| 133 |
|
|
while (isdigit(**s))
|
| 134 |
|
|
i = i*10 + *((*s)++) - '0';
|
| 135 |
|
|
return i;
|
| 136 |
|
|
}
|
| 137 |
|
|
|
| 138 |
|
|
/* Decimal conversion is by far the most typical, and is used
|
| 139 |
|
|
* for /proc and /sys data. This directly impacts e.g. top performance
|
| 140 |
|
|
* with many processes running. We optimize it for speed
|
| 141 |
|
|
* using code from
|
| 142 |
|
|
* http://www.cs.uiowa.edu/~jones/bcd/decimal.html
|
| 143 |
|
|
* (with permission from the author, Douglas W. Jones). */
|
| 144 |
|
|
|
| 145 |
|
|
/* Formats correctly any integer in [0,99999].
|
| 146 |
|
|
* Outputs from one to five digits depending on input.
|
| 147 |
|
|
* On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
|
| 148 |
|
|
static char* put_dec_trunc(char *buf, unsigned q)
|
| 149 |
|
|
{
|
| 150 |
|
|
unsigned d3, d2, d1, d0;
|
| 151 |
|
|
d1 = (q>>4) & 0xf;
|
| 152 |
|
|
d2 = (q>>8) & 0xf;
|
| 153 |
|
|
d3 = (q>>12);
|
| 154 |
|
|
|
| 155 |
|
|
d0 = 6*(d3 + d2 + d1) + (q & 0xf);
|
| 156 |
|
|
q = (d0 * 0xcd) >> 11;
|
| 157 |
|
|
d0 = d0 - 10*q;
|
| 158 |
|
|
*buf++ = d0 + '0'; /* least significant digit */
|
| 159 |
|
|
d1 = q + 9*d3 + 5*d2 + d1;
|
| 160 |
|
|
if (d1 != 0) {
|
| 161 |
|
|
q = (d1 * 0xcd) >> 11;
|
| 162 |
|
|
d1 = d1 - 10*q;
|
| 163 |
|
|
*buf++ = d1 + '0'; /* next digit */
|
| 164 |
|
|
|
| 165 |
|
|
d2 = q + 2*d2;
|
| 166 |
|
|
if ((d2 != 0) || (d3 != 0)) {
|
| 167 |
|
|
q = (d2 * 0xd) >> 7;
|
| 168 |
|
|
d2 = d2 - 10*q;
|
| 169 |
|
|
*buf++ = d2 + '0'; /* next digit */
|
| 170 |
|
|
|
| 171 |
|
|
d3 = q + 4*d3;
|
| 172 |
|
|
if (d3 != 0) {
|
| 173 |
|
|
q = (d3 * 0xcd) >> 11;
|
| 174 |
|
|
d3 = d3 - 10*q;
|
| 175 |
|
|
*buf++ = d3 + '0'; /* next digit */
|
| 176 |
|
|
if (q != 0)
|
| 177 |
|
|
*buf++ = q + '0'; /* most sign. digit */
|
| 178 |
|
|
}
|
| 179 |
|
|
}
|
| 180 |
|
|
}
|
| 181 |
|
|
return buf;
|
| 182 |
|
|
}
|
| 183 |
|
|
/* Same with if's removed. Always emits five digits */
|
| 184 |
|
|
static char* put_dec_full(char *buf, unsigned q)
|
| 185 |
|
|
{
|
| 186 |
|
|
/* BTW, if q is in [0,9999], 8-bit ints will be enough, */
|
| 187 |
|
|
/* but anyway, gcc produces better code with full-sized ints */
|
| 188 |
|
|
unsigned d3, d2, d1, d0;
|
| 189 |
|
|
d1 = (q>>4) & 0xf;
|
| 190 |
|
|
d2 = (q>>8) & 0xf;
|
| 191 |
|
|
d3 = (q>>12);
|
| 192 |
|
|
|
| 193 |
|
|
/* Possible ways to approx. divide by 10 */
|
| 194 |
|
|
/* gcc -O2 replaces multiply with shifts and adds */
|
| 195 |
|
|
// (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
|
| 196 |
|
|
// (x * 0x67) >> 10: 1100111
|
| 197 |
|
|
// (x * 0x34) >> 9: 110100 - same
|
| 198 |
|
|
// (x * 0x1a) >> 8: 11010 - same
|
| 199 |
|
|
// (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
|
| 200 |
|
|
|
| 201 |
|
|
d0 = 6*(d3 + d2 + d1) + (q & 0xf);
|
| 202 |
|
|
q = (d0 * 0xcd) >> 11;
|
| 203 |
|
|
d0 = d0 - 10*q;
|
| 204 |
|
|
*buf++ = d0 + '0';
|
| 205 |
|
|
d1 = q + 9*d3 + 5*d2 + d1;
|
| 206 |
|
|
q = (d1 * 0xcd) >> 11;
|
| 207 |
|
|
d1 = d1 - 10*q;
|
| 208 |
|
|
*buf++ = d1 + '0';
|
| 209 |
|
|
|
| 210 |
|
|
d2 = q + 2*d2;
|
| 211 |
|
|
q = (d2 * 0xd) >> 7;
|
| 212 |
|
|
d2 = d2 - 10*q;
|
| 213 |
|
|
*buf++ = d2 + '0';
|
| 214 |
|
|
|
| 215 |
|
|
d3 = q + 4*d3;
|
| 216 |
|
|
q = (d3 * 0xcd) >> 11; /* - shorter code */
|
| 217 |
|
|
/* q = (d3 * 0x67) >> 10; - would also work */
|
| 218 |
|
|
d3 = d3 - 10*q;
|
| 219 |
|
|
*buf++ = d3 + '0';
|
| 220 |
|
|
*buf++ = q + '0';
|
| 221 |
|
|
return buf;
|
| 222 |
|
|
}
|
| 223 |
|
|
/* No inlining helps gcc to use registers better */
|
| 224 |
|
|
static noinline char* put_dec(char *buf, unsigned long long num)
|
| 225 |
|
|
{
|
| 226 |
|
|
while (1) {
|
| 227 |
|
|
unsigned rem;
|
| 228 |
|
|
if (num < 100000)
|
| 229 |
|
|
return put_dec_trunc(buf, num);
|
| 230 |
|
|
rem = do_div(num, 100000);
|
| 231 |
|
|
buf = put_dec_full(buf, rem);
|
| 232 |
|
|
}
|
| 233 |
|
|
}
|
| 234 |
|
|
|
| 235 |
|
|
#define ZEROPAD 1 /* pad with zero */
|
| 236 |
|
|
#define SIGN 2 /* unsigned/signed long */
|
| 237 |
|
|
#define PLUS 4 /* show plus */
|
| 238 |
|
|
#define SPACE 8 /* space if plus */
|
| 239 |
|
|
#define LEFT 16 /* left justified */
|
| 240 |
|
|
#define SPECIAL 32 /* 0x */
|
| 241 |
|
|
#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
|
| 242 |
|
|
|
| 243 |
|
|
static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type)
|
| 244 |
|
|
{
|
| 245 |
|
|
char sign,tmp[66];
|
| 246 |
|
|
const char *digits;
|
| 247 |
|
|
/* we are called with base 8, 10 or 16, only, thus don't need "g..." */
|
| 248 |
|
|
static const char small_digits[] = "0123456789abcdefx"; /* "ghijklmnopqrstuvwxyz"; */
|
| 249 |
|
|
static const char large_digits[] = "0123456789ABCDEFX"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
|
| 250 |
|
|
int need_pfx = ((type & SPECIAL) && base != 10);
|
| 251 |
|
|
int i;
|
| 252 |
|
|
|
| 253 |
|
|
digits = (type & LARGE) ? large_digits : small_digits;
|
| 254 |
|
|
if (type & LEFT)
|
| 255 |
|
|
type &= ~ZEROPAD;
|
| 256 |
|
|
if (base < 2 || base > 36)
|
| 257 |
|
|
return NULL;
|
| 258 |
|
|
sign = 0;
|
| 259 |
|
|
if (type & SIGN) {
|
| 260 |
|
|
if ((signed long long) num < 0) {
|
| 261 |
|
|
sign = '-';
|
| 262 |
|
|
num = - (signed long long) num;
|
| 263 |
|
|
size--;
|
| 264 |
|
|
} else if (type & PLUS) {
|
| 265 |
|
|
sign = '+';
|
| 266 |
|
|
size--;
|
| 267 |
|
|
} else if (type & SPACE) {
|
| 268 |
|
|
sign = ' ';
|
| 269 |
|
|
size--;
|
| 270 |
|
|
}
|
| 271 |
|
|
}
|
| 272 |
|
|
if (need_pfx) {
|
| 273 |
|
|
size--;
|
| 274 |
|
|
if (base == 16)
|
| 275 |
|
|
size--;
|
| 276 |
|
|
}
|
| 277 |
|
|
|
| 278 |
|
|
/* generate full string in tmp[], in reverse order */
|
| 279 |
|
|
i = 0;
|
| 280 |
|
|
if (num == 0)
|
| 281 |
|
|
tmp[i++] = '0';
|
| 282 |
|
|
/* Generic code, for any base:
|
| 283 |
|
|
else do {
|
| 284 |
|
|
tmp[i++] = digits[do_div(num,base)];
|
| 285 |
|
|
} while (num != 0);
|
| 286 |
|
|
*/
|
| 287 |
|
|
else if (base != 10) { /* 8 or 16 */
|
| 288 |
|
|
int mask = base - 1;
|
| 289 |
|
|
int shift = 3;
|
| 290 |
|
|
if (base == 16) shift = 4;
|
| 291 |
|
|
do {
|
| 292 |
|
|
tmp[i++] = digits[((unsigned char)num) & mask];
|
| 293 |
|
|
num >>= shift;
|
| 294 |
|
|
} while (num);
|
| 295 |
|
|
} else { /* base 10 */
|
| 296 |
|
|
i = put_dec(tmp, num) - tmp;
|
| 297 |
|
|
}
|
| 298 |
|
|
|
| 299 |
|
|
/* printing 100 using %2d gives "100", not "00" */
|
| 300 |
|
|
if (i > precision)
|
| 301 |
|
|
precision = i;
|
| 302 |
|
|
/* leading space padding */
|
| 303 |
|
|
size -= precision;
|
| 304 |
|
|
if (!(type & (ZEROPAD+LEFT))) {
|
| 305 |
|
|
while(--size >= 0) {
|
| 306 |
|
|
if (buf < end)
|
| 307 |
|
|
*buf = ' ';
|
| 308 |
|
|
++buf;
|
| 309 |
|
|
}
|
| 310 |
|
|
}
|
| 311 |
|
|
/* sign */
|
| 312 |
|
|
if (sign) {
|
| 313 |
|
|
if (buf < end)
|
| 314 |
|
|
*buf = sign;
|
| 315 |
|
|
++buf;
|
| 316 |
|
|
}
|
| 317 |
|
|
/* "0x" / "0" prefix */
|
| 318 |
|
|
if (need_pfx) {
|
| 319 |
|
|
if (buf < end)
|
| 320 |
|
|
*buf = '0';
|
| 321 |
|
|
++buf;
|
| 322 |
|
|
if (base == 16) {
|
| 323 |
|
|
if (buf < end)
|
| 324 |
|
|
*buf = digits[16]; /* for arbitrary base: digits[33]; */
|
| 325 |
|
|
++buf;
|
| 326 |
|
|
}
|
| 327 |
|
|
}
|
| 328 |
|
|
/* zero or space padding */
|
| 329 |
|
|
if (!(type & LEFT)) {
|
| 330 |
|
|
char c = (type & ZEROPAD) ? '0' : ' ';
|
| 331 |
|
|
while (--size >= 0) {
|
| 332 |
|
|
if (buf < end)
|
| 333 |
|
|
*buf = c;
|
| 334 |
|
|
++buf;
|
| 335 |
|
|
}
|
| 336 |
|
|
}
|
| 337 |
|
|
/* hmm even more zero padding? */
|
| 338 |
|
|
while (i <= --precision) {
|
| 339 |
|
|
if (buf < end)
|
| 340 |
|
|
*buf = '0';
|
| 341 |
|
|
++buf;
|
| 342 |
|
|
}
|
| 343 |
|
|
/* actual digits of result */
|
| 344 |
|
|
while (--i >= 0) {
|
| 345 |
|
|
if (buf < end)
|
| 346 |
|
|
*buf = tmp[i];
|
| 347 |
|
|
++buf;
|
| 348 |
|
|
}
|
| 349 |
|
|
/* trailing space padding */
|
| 350 |
|
|
while (--size >= 0) {
|
| 351 |
|
|
if (buf < end)
|
| 352 |
|
|
*buf = ' ';
|
| 353 |
|
|
++buf;
|
| 354 |
|
|
}
|
| 355 |
|
|
return buf;
|
| 356 |
|
|
}
|
| 357 |
|
|
|
| 358 |
|
|
/**
|
| 359 |
|
|
* vsnprintf - Format a string and place it in a buffer
|
| 360 |
|
|
* @buf: The buffer to place the result into
|
| 361 |
|
|
* @size: The size of the buffer, including the trailing null space
|
| 362 |
|
|
* @fmt: The format string to use
|
| 363 |
|
|
* @args: Arguments for the format string
|
| 364 |
|
|
*
|
| 365 |
|
|
* The return value is the number of characters which would
|
| 366 |
|
|
* be generated for the given input, excluding the trailing
|
| 367 |
|
|
* '\0', as per ISO C99. If you want to have the exact
|
| 368 |
|
|
* number of characters written into @buf as return value
|
| 369 |
|
|
* (not including the trailing '\0'), use vscnprintf(). If the
|
| 370 |
|
|
* return is greater than or equal to @size, the resulting
|
| 371 |
|
|
* string is truncated.
|
| 372 |
|
|
*
|
| 373 |
|
|
* Call this function if you are already dealing with a va_list.
|
| 374 |
|
|
* You probably want snprintf() instead.
|
| 375 |
|
|
*/
|
| 376 |
|
|
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
| 377 |
|
|
{
|
| 378 |
|
|
int len;
|
| 379 |
|
|
unsigned long long num;
|
| 380 |
|
|
int i, base;
|
| 381 |
|
|
char *str, *end, c;
|
| 382 |
|
|
const char *s;
|
| 383 |
|
|
|
| 384 |
|
|
int flags; /* flags to number() */
|
| 385 |
|
|
|
| 386 |
|
|
int field_width; /* width of output field */
|
| 387 |
|
|
int precision; /* min. # of digits for integers; max
|
| 388 |
|
|
number of chars for from string */
|
| 389 |
|
|
int qualifier; /* 'h', 'l', or 'L' for integer fields */
|
| 390 |
|
|
/* 'z' support added 23/7/1999 S.H. */
|
| 391 |
|
|
/* 'z' changed to 'Z' --davidm 1/25/99 */
|
| 392 |
|
|
/* 't' added for ptrdiff_t */
|
| 393 |
|
|
|
| 394 |
|
|
/* Reject out-of-range values early. Large positive sizes are
|
| 395 |
|
|
used for unknown buffer sizes. */
|
| 396 |
|
|
if (unlikely((int) size < 0)) {
|
| 397 |
|
|
/* There can be only one.. */
|
| 398 |
|
|
static char warn = 1;
|
| 399 |
|
|
WARN_ON(warn);
|
| 400 |
|
|
warn = 0;
|
| 401 |
|
|
return 0;
|
| 402 |
|
|
}
|
| 403 |
|
|
|
| 404 |
|
|
str = buf;
|
| 405 |
|
|
end = buf + size;
|
| 406 |
|
|
|
| 407 |
|
|
/* Make sure end is always >= buf */
|
| 408 |
|
|
if (end < buf) {
|
| 409 |
|
|
end = ((void *)-1);
|
| 410 |
|
|
size = end - buf;
|
| 411 |
|
|
}
|
| 412 |
|
|
|
| 413 |
|
|
for (; *fmt ; ++fmt) {
|
| 414 |
|
|
if (*fmt != '%') {
|
| 415 |
|
|
if (str < end)
|
| 416 |
|
|
*str = *fmt;
|
| 417 |
|
|
++str;
|
| 418 |
|
|
continue;
|
| 419 |
|
|
}
|
| 420 |
|
|
|
| 421 |
|
|
/* process flags */
|
| 422 |
|
|
flags = 0;
|
| 423 |
|
|
repeat:
|
| 424 |
|
|
++fmt; /* this also skips first '%' */
|
| 425 |
|
|
switch (*fmt) {
|
| 426 |
|
|
case '-': flags |= LEFT; goto repeat;
|
| 427 |
|
|
case '+': flags |= PLUS; goto repeat;
|
| 428 |
|
|
case ' ': flags |= SPACE; goto repeat;
|
| 429 |
|
|
case '#': flags |= SPECIAL; goto repeat;
|
| 430 |
|
|
case '0': flags |= ZEROPAD; goto repeat;
|
| 431 |
|
|
}
|
| 432 |
|
|
|
| 433 |
|
|
/* get field width */
|
| 434 |
|
|
field_width = -1;
|
| 435 |
|
|
if (isdigit(*fmt))
|
| 436 |
|
|
field_width = skip_atoi(&fmt);
|
| 437 |
|
|
else if (*fmt == '*') {
|
| 438 |
|
|
++fmt;
|
| 439 |
|
|
/* it's the next argument */
|
| 440 |
|
|
field_width = va_arg(args, int);
|
| 441 |
|
|
if (field_width < 0) {
|
| 442 |
|
|
field_width = -field_width;
|
| 443 |
|
|
flags |= LEFT;
|
| 444 |
|
|
}
|
| 445 |
|
|
}
|
| 446 |
|
|
|
| 447 |
|
|
/* get the precision */
|
| 448 |
|
|
precision = -1;
|
| 449 |
|
|
if (*fmt == '.') {
|
| 450 |
|
|
++fmt;
|
| 451 |
|
|
if (isdigit(*fmt))
|
| 452 |
|
|
precision = skip_atoi(&fmt);
|
| 453 |
|
|
else if (*fmt == '*') {
|
| 454 |
|
|
++fmt;
|
| 455 |
|
|
/* it's the next argument */
|
| 456 |
|
|
precision = va_arg(args, int);
|
| 457 |
|
|
}
|
| 458 |
|
|
if (precision < 0)
|
| 459 |
|
|
precision = 0;
|
| 460 |
|
|
}
|
| 461 |
|
|
|
| 462 |
|
|
/* get the conversion qualifier */
|
| 463 |
|
|
qualifier = -1;
|
| 464 |
|
|
if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
|
| 465 |
|
|
*fmt =='Z' || *fmt == 'z' || *fmt == 't') {
|
| 466 |
|
|
qualifier = *fmt;
|
| 467 |
|
|
++fmt;
|
| 468 |
|
|
if (qualifier == 'l' && *fmt == 'l') {
|
| 469 |
|
|
qualifier = 'L';
|
| 470 |
|
|
++fmt;
|
| 471 |
|
|
}
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
/* default base */
|
| 475 |
|
|
base = 10;
|
| 476 |
|
|
|
| 477 |
|
|
switch (*fmt) {
|
| 478 |
|
|
case 'c':
|
| 479 |
|
|
if (!(flags & LEFT)) {
|
| 480 |
|
|
while (--field_width > 0) {
|
| 481 |
|
|
if (str < end)
|
| 482 |
|
|
*str = ' ';
|
| 483 |
|
|
++str;
|
| 484 |
|
|
}
|
| 485 |
|
|
}
|
| 486 |
|
|
c = (unsigned char) va_arg(args, int);
|
| 487 |
|
|
if (str < end)
|
| 488 |
|
|
*str = c;
|
| 489 |
|
|
++str;
|
| 490 |
|
|
while (--field_width > 0) {
|
| 491 |
|
|
if (str < end)
|
| 492 |
|
|
*str = ' ';
|
| 493 |
|
|
++str;
|
| 494 |
|
|
}
|
| 495 |
|
|
continue;
|
| 496 |
|
|
|
| 497 |
|
|
case 's':
|
| 498 |
|
|
s = va_arg(args, char *);
|
| 499 |
|
|
if ((unsigned long)s < PAGE_SIZE)
|
| 500 |
|
|
s = "<NULL>";
|
| 501 |
|
|
|
| 502 |
|
|
len = strnlen(s, precision);
|
| 503 |
|
|
|
| 504 |
|
|
if (!(flags & LEFT)) {
|
| 505 |
|
|
while (len < field_width--) {
|
| 506 |
|
|
if (str < end)
|
| 507 |
|
|
*str = ' ';
|
| 508 |
|
|
++str;
|
| 509 |
|
|
}
|
| 510 |
|
|
}
|
| 511 |
|
|
for (i = 0; i < len; ++i) {
|
| 512 |
|
|
if (str < end)
|
| 513 |
|
|
*str = *s;
|
| 514 |
|
|
++str; ++s;
|
| 515 |
|
|
}
|
| 516 |
|
|
while (len < field_width--) {
|
| 517 |
|
|
if (str < end)
|
| 518 |
|
|
*str = ' ';
|
| 519 |
|
|
++str;
|
| 520 |
|
|
}
|
| 521 |
|
|
continue;
|
| 522 |
|
|
|
| 523 |
|
|
case 'p':
|
| 524 |
|
|
if (field_width == -1) {
|
| 525 |
|
|
field_width = 2*sizeof(void *);
|
| 526 |
|
|
flags |= ZEROPAD;
|
| 527 |
|
|
}
|
| 528 |
|
|
str = number(str, end,
|
| 529 |
|
|
(unsigned long) va_arg(args, void *),
|
| 530 |
|
|
16, field_width, precision, flags);
|
| 531 |
|
|
continue;
|
| 532 |
|
|
|
| 533 |
|
|
|
| 534 |
|
|
case 'n':
|
| 535 |
|
|
/* FIXME:
|
| 536 |
|
|
* What does C99 say about the overflow case here? */
|
| 537 |
|
|
if (qualifier == 'l') {
|
| 538 |
|
|
long * ip = va_arg(args, long *);
|
| 539 |
|
|
*ip = (str - buf);
|
| 540 |
|
|
} else if (qualifier == 'Z' || qualifier == 'z') {
|
| 541 |
|
|
size_t * ip = va_arg(args, size_t *);
|
| 542 |
|
|
*ip = (str - buf);
|
| 543 |
|
|
} else {
|
| 544 |
|
|
int * ip = va_arg(args, int *);
|
| 545 |
|
|
*ip = (str - buf);
|
| 546 |
|
|
}
|
| 547 |
|
|
continue;
|
| 548 |
|
|
|
| 549 |
|
|
case '%':
|
| 550 |
|
|
if (str < end)
|
| 551 |
|
|
*str = '%';
|
| 552 |
|
|
++str;
|
| 553 |
|
|
continue;
|
| 554 |
|
|
|
| 555 |
|
|
/* integer number formats - set up the flags and "break" */
|
| 556 |
|
|
case 'o':
|
| 557 |
|
|
base = 8;
|
| 558 |
|
|
break;
|
| 559 |
|
|
|
| 560 |
|
|
case 'X':
|
| 561 |
|
|
flags |= LARGE;
|
| 562 |
|
|
case 'x':
|
| 563 |
|
|
base = 16;
|
| 564 |
|
|
break;
|
| 565 |
|
|
|
| 566 |
|
|
case 'd':
|
| 567 |
|
|
case 'i':
|
| 568 |
|
|
flags |= SIGN;
|
| 569 |
|
|
case 'u':
|
| 570 |
|
|
break;
|
| 571 |
|
|
|
| 572 |
|
|
default:
|
| 573 |
|
|
if (str < end)
|
| 574 |
|
|
*str = '%';
|
| 575 |
|
|
++str;
|
| 576 |
|
|
if (*fmt) {
|
| 577 |
|
|
if (str < end)
|
| 578 |
|
|
*str = *fmt;
|
| 579 |
|
|
++str;
|
| 580 |
|
|
} else {
|
| 581 |
|
|
--fmt;
|
| 582 |
|
|
}
|
| 583 |
|
|
continue;
|
| 584 |
|
|
}
|
| 585 |
|
|
if (qualifier == 'L')
|
| 586 |
|
|
num = va_arg(args, long long);
|
| 587 |
|
|
else if (qualifier == 'l') {
|
| 588 |
|
|
num = va_arg(args, unsigned long);
|
| 589 |
|
|
if (flags & SIGN)
|
| 590 |
|
|
num = (signed long) num;
|
| 591 |
|
|
} else if (qualifier == 'Z' || qualifier == 'z') {
|
| 592 |
|
|
num = va_arg(args, size_t);
|
| 593 |
|
|
} else if (qualifier == 't') {
|
| 594 |
|
|
num = va_arg(args, ptrdiff_t);
|
| 595 |
|
|
} else if (qualifier == 'h') {
|
| 596 |
|
|
num = (unsigned short) va_arg(args, int);
|
| 597 |
|
|
if (flags & SIGN)
|
| 598 |
|
|
num = (signed short) num;
|
| 599 |
|
|
} else {
|
| 600 |
|
|
num = va_arg(args, unsigned int);
|
| 601 |
|
|
if (flags & SIGN)
|
| 602 |
|
|
num = (signed int) num;
|
| 603 |
|
|
}
|
| 604 |
|
|
str = number(str, end, num, base,
|
| 605 |
|
|
field_width, precision, flags);
|
| 606 |
|
|
}
|
| 607 |
|
|
if (size > 0) {
|
| 608 |
|
|
if (str < end)
|
| 609 |
|
|
*str = '\0';
|
| 610 |
|
|
else
|
| 611 |
|
|
end[-1] = '\0';
|
| 612 |
|
|
}
|
| 613 |
|
|
/* the trailing null byte doesn't count towards the total */
|
| 614 |
|
|
return str-buf;
|
| 615 |
|
|
}
|
| 616 |
|
|
|
| 617 |
|
|
EXPORT_SYMBOL(vsnprintf);
|
| 618 |
|
|
|
| 619 |
|
|
/**
|
| 620 |
|
|
* vscnprintf - Format a string and place it in a buffer
|
| 621 |
|
|
* @buf: The buffer to place the result into
|
| 622 |
|
|
* @size: The size of the buffer, including the trailing null space
|
| 623 |
|
|
* @fmt: The format string to use
|
| 624 |
|
|
* @args: Arguments for the format string
|
| 625 |
|
|
*
|
| 626 |
|
|
* The return value is the number of characters which have been written into
|
| 627 |
|
|
* the @buf not including the trailing '\0'. If @size is <= 0 the function
|
| 628 |
|
|
* returns 0.
|
| 629 |
|
|
*
|
| 630 |
|
|
* Call this function if you are already dealing with a va_list.
|
| 631 |
|
|
* You probably want scnprintf() instead.
|
| 632 |
|
|
*/
|
| 633 |
|
|
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
| 634 |
|
|
{
|
| 635 |
|
|
int i;
|
| 636 |
|
|
|
| 637 |
|
|
i=vsnprintf(buf,size,fmt,args);
|
| 638 |
|
|
return (i >= size) ? (size - 1) : i;
|
| 639 |
|
|
}
|
| 640 |
|
|
|
| 641 |
|
|
EXPORT_SYMBOL(vscnprintf);
|
| 642 |
|
|
|
| 643 |
|
|
/**
|
| 644 |
|
|
* snprintf - Format a string and place it in a buffer
|
| 645 |
|
|
* @buf: The buffer to place the result into
|
| 646 |
|
|
* @size: The size of the buffer, including the trailing null space
|
| 647 |
|
|
* @fmt: The format string to use
|
| 648 |
|
|
* @...: Arguments for the format string
|
| 649 |
|
|
*
|
| 650 |
|
|
* The return value is the number of characters which would be
|
| 651 |
|
|
* generated for the given input, excluding the trailing null,
|
| 652 |
|
|
* as per ISO C99. If the return is greater than or equal to
|
| 653 |
|
|
* @size, the resulting string is truncated.
|
| 654 |
|
|
*/
|
| 655 |
|
|
int snprintf(char * buf, size_t size, const char *fmt, ...)
|
| 656 |
|
|
{
|
| 657 |
|
|
va_list args;
|
| 658 |
|
|
int i;
|
| 659 |
|
|
|
| 660 |
|
|
va_start(args, fmt);
|
| 661 |
|
|
i=vsnprintf(buf,size,fmt,args);
|
| 662 |
|
|
va_end(args);
|
| 663 |
|
|
return i;
|
| 664 |
|
|
}
|
| 665 |
|
|
|
| 666 |
|
|
EXPORT_SYMBOL(snprintf);
|
| 667 |
|
|
|
| 668 |
|
|
/**
|
| 669 |
|
|
* scnprintf - Format a string and place it in a buffer
|
| 670 |
|
|
* @buf: The buffer to place the result into
|
| 671 |
|
|
* @size: The size of the buffer, including the trailing null space
|
| 672 |
|
|
* @fmt: The format string to use
|
| 673 |
|
|
* @...: Arguments for the format string
|
| 674 |
|
|
*
|
| 675 |
|
|
* The return value is the number of characters written into @buf not including
|
| 676 |
|
|
* the trailing '\0'. If @size is <= 0 the function returns 0.
|
| 677 |
|
|
*/
|
| 678 |
|
|
|
| 679 |
|
|
int scnprintf(char * buf, size_t size, const char *fmt, ...)
|
| 680 |
|
|
{
|
| 681 |
|
|
va_list args;
|
| 682 |
|
|
int i;
|
| 683 |
|
|
|
| 684 |
|
|
va_start(args, fmt);
|
| 685 |
|
|
i = vsnprintf(buf, size, fmt, args);
|
| 686 |
|
|
va_end(args);
|
| 687 |
|
|
return (i >= size) ? (size - 1) : i;
|
| 688 |
|
|
}
|
| 689 |
|
|
EXPORT_SYMBOL(scnprintf);
|
| 690 |
|
|
|
| 691 |
|
|
/**
|
| 692 |
|
|
* vsprintf - Format a string and place it in a buffer
|
| 693 |
|
|
* @buf: The buffer to place the result into
|
| 694 |
|
|
* @fmt: The format string to use
|
| 695 |
|
|
* @args: Arguments for the format string
|
| 696 |
|
|
*
|
| 697 |
|
|
* The function returns the number of characters written
|
| 698 |
|
|
* into @buf. Use vsnprintf() or vscnprintf() in order to avoid
|
| 699 |
|
|
* buffer overflows.
|
| 700 |
|
|
*
|
| 701 |
|
|
* Call this function if you are already dealing with a va_list.
|
| 702 |
|
|
* You probably want sprintf() instead.
|
| 703 |
|
|
*/
|
| 704 |
|
|
int vsprintf(char *buf, const char *fmt, va_list args)
|
| 705 |
|
|
{
|
| 706 |
|
|
return vsnprintf(buf, INT_MAX, fmt, args);
|
| 707 |
|
|
}
|
| 708 |
|
|
|
| 709 |
|
|
EXPORT_SYMBOL(vsprintf);
|
| 710 |
|
|
|
| 711 |
|
|
/**
|
| 712 |
|
|
* sprintf - Format a string and place it in a buffer
|
| 713 |
|
|
* @buf: The buffer to place the result into
|
| 714 |
|
|
* @fmt: The format string to use
|
| 715 |
|
|
* @...: Arguments for the format string
|
| 716 |
|
|
*
|
| 717 |
|
|
* The function returns the number of characters written
|
| 718 |
|
|
* into @buf. Use snprintf() or scnprintf() in order to avoid
|
| 719 |
|
|
* buffer overflows.
|
| 720 |
|
|
*/
|
| 721 |
|
|
int sprintf(char * buf, const char *fmt, ...)
|
| 722 |
|
|
{
|
| 723 |
|
|
va_list args;
|
| 724 |
|
|
int i;
|
| 725 |
|
|
|
| 726 |
|
|
va_start(args, fmt);
|
| 727 |
|
|
i=vsnprintf(buf, INT_MAX, fmt, args);
|
| 728 |
|
|
va_end(args);
|
| 729 |
|
|
return i;
|
| 730 |
|
|
}
|
| 731 |
|
|
|
| 732 |
|
|
EXPORT_SYMBOL(sprintf);
|
| 733 |
|
|
|
| 734 |
|
|
/**
|
| 735 |
|
|
* vsscanf - Unformat a buffer into a list of arguments
|
| 736 |
|
|
* @buf: input buffer
|
| 737 |
|
|
* @fmt: format of buffer
|
| 738 |
|
|
* @args: arguments
|
| 739 |
|
|
*/
|
| 740 |
|
|
int vsscanf(const char * buf, const char * fmt, va_list args)
|
| 741 |
|
|
{
|
| 742 |
|
|
const char *str = buf;
|
| 743 |
|
|
char *next;
|
| 744 |
|
|
char digit;
|
| 745 |
|
|
int num = 0;
|
| 746 |
|
|
int qualifier;
|
| 747 |
|
|
int base;
|
| 748 |
|
|
int field_width;
|
| 749 |
|
|
int is_sign = 0;
|
| 750 |
|
|
|
| 751 |
|
|
while(*fmt && *str) {
|
| 752 |
|
|
/* skip any white space in format */
|
| 753 |
|
|
/* white space in format matchs any amount of
|
| 754 |
|
|
* white space, including none, in the input.
|
| 755 |
|
|
*/
|
| 756 |
|
|
if (isspace(*fmt)) {
|
| 757 |
|
|
while (isspace(*fmt))
|
| 758 |
|
|
++fmt;
|
| 759 |
|
|
while (isspace(*str))
|
| 760 |
|
|
++str;
|
| 761 |
|
|
}
|
| 762 |
|
|
|
| 763 |
|
|
/* anything that is not a conversion must match exactly */
|
| 764 |
|
|
if (*fmt != '%' && *fmt) {
|
| 765 |
|
|
if (*fmt++ != *str++)
|
| 766 |
|
|
break;
|
| 767 |
|
|
continue;
|
| 768 |
|
|
}
|
| 769 |
|
|
|
| 770 |
|
|
if (!*fmt)
|
| 771 |
|
|
break;
|
| 772 |
|
|
++fmt;
|
| 773 |
|
|
|
| 774 |
|
|
/* skip this conversion.
|
| 775 |
|
|
* advance both strings to next white space
|
| 776 |
|
|
*/
|
| 777 |
|
|
if (*fmt == '*') {
|
| 778 |
|
|
while (!isspace(*fmt) && *fmt)
|
| 779 |
|
|
fmt++;
|
| 780 |
|
|
while (!isspace(*str) && *str)
|
| 781 |
|
|
str++;
|
| 782 |
|
|
continue;
|
| 783 |
|
|
}
|
| 784 |
|
|
|
| 785 |
|
|
/* get field width */
|
| 786 |
|
|
field_width = -1;
|
| 787 |
|
|
if (isdigit(*fmt))
|
| 788 |
|
|
field_width = skip_atoi(&fmt);
|
| 789 |
|
|
|
| 790 |
|
|
/* get conversion qualifier */
|
| 791 |
|
|
qualifier = -1;
|
| 792 |
|
|
if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
|
| 793 |
|
|
*fmt == 'Z' || *fmt == 'z') {
|
| 794 |
|
|
qualifier = *fmt++;
|
| 795 |
|
|
if (unlikely(qualifier == *fmt)) {
|
| 796 |
|
|
if (qualifier == 'h') {
|
| 797 |
|
|
qualifier = 'H';
|
| 798 |
|
|
fmt++;
|
| 799 |
|
|
} else if (qualifier == 'l') {
|
| 800 |
|
|
qualifier = 'L';
|
| 801 |
|
|
fmt++;
|
| 802 |
|
|
}
|
| 803 |
|
|
}
|
| 804 |
|
|
}
|
| 805 |
|
|
base = 10;
|
| 806 |
|
|
is_sign = 0;
|
| 807 |
|
|
|
| 808 |
|
|
if (!*fmt || !*str)
|
| 809 |
|
|
break;
|
| 810 |
|
|
|
| 811 |
|
|
switch(*fmt++) {
|
| 812 |
|
|
case 'c':
|
| 813 |
|
|
{
|
| 814 |
|
|
char *s = (char *) va_arg(args,char*);
|
| 815 |
|
|
if (field_width == -1)
|
| 816 |
|
|
field_width = 1;
|
| 817 |
|
|
do {
|
| 818 |
|
|
*s++ = *str++;
|
| 819 |
|
|
} while (--field_width > 0 && *str);
|
| 820 |
|
|
num++;
|
| 821 |
|
|
}
|
| 822 |
|
|
continue;
|
| 823 |
|
|
case 's':
|
| 824 |
|
|
{
|
| 825 |
|
|
char *s = (char *) va_arg(args, char *);
|
| 826 |
|
|
if(field_width == -1)
|
| 827 |
|
|
field_width = INT_MAX;
|
| 828 |
|
|
/* first, skip leading white space in buffer */
|
| 829 |
|
|
while (isspace(*str))
|
| 830 |
|
|
str++;
|
| 831 |
|
|
|
| 832 |
|
|
/* now copy until next white space */
|
| 833 |
|
|
while (*str && !isspace(*str) && field_width--) {
|
| 834 |
|
|
*s++ = *str++;
|
| 835 |
|
|
}
|
| 836 |
|
|
*s = '\0';
|
| 837 |
|
|
num++;
|
| 838 |
|
|
}
|
| 839 |
|
|
continue;
|
| 840 |
|
|
case 'n':
|
| 841 |
|
|
/* return number of characters read so far */
|
| 842 |
|
|
{
|
| 843 |
|
|
int *i = (int *)va_arg(args,int*);
|
| 844 |
|
|
*i = str - buf;
|
| 845 |
|
|
}
|
| 846 |
|
|
continue;
|
| 847 |
|
|
case 'o':
|
| 848 |
|
|
base = 8;
|
| 849 |
|
|
break;
|
| 850 |
|
|
case 'x':
|
| 851 |
|
|
case 'X':
|
| 852 |
|
|
base = 16;
|
| 853 |
|
|
break;
|
| 854 |
|
|
case 'i':
|
| 855 |
|
|
base = 0;
|
| 856 |
|
|
case 'd':
|
| 857 |
|
|
is_sign = 1;
|
| 858 |
|
|
case 'u':
|
| 859 |
|
|
break;
|
| 860 |
|
|
case '%':
|
| 861 |
|
|
/* looking for '%' in str */
|
| 862 |
|
|
if (*str++ != '%')
|
| 863 |
|
|
return num;
|
| 864 |
|
|
continue;
|
| 865 |
|
|
default:
|
| 866 |
|
|
/* invalid format; stop here */
|
| 867 |
|
|
return num;
|
| 868 |
|
|
}
|
| 869 |
|
|
|
| 870 |
|
|
/* have some sort of integer conversion.
|
| 871 |
|
|
* first, skip white space in buffer.
|
| 872 |
|
|
*/
|
| 873 |
|
|
while (isspace(*str))
|
| 874 |
|
|
str++;
|
| 875 |
|
|
|
| 876 |
|
|
digit = *str;
|
| 877 |
|
|
if (is_sign && digit == '-')
|
| 878 |
|
|
digit = *(str + 1);
|
| 879 |
|
|
|
| 880 |
|
|
if (!digit
|
| 881 |
|
|
|| (base == 16 && !isxdigit(digit))
|
| 882 |
|
|
|| (base == 10 && !isdigit(digit))
|
| 883 |
|
|
|| (base == 8 && (!isdigit(digit) || digit > '7'))
|
| 884 |
|
|
|| (base == 0 && !isdigit(digit)))
|
| 885 |
|
|
break;
|
| 886 |
|
|
|
| 887 |
|
|
switch(qualifier) {
|
| 888 |
|
|
case 'H': /* that's 'hh' in format */
|
| 889 |
|
|
if (is_sign) {
|
| 890 |
|
|
signed char *s = (signed char *) va_arg(args,signed char *);
|
| 891 |
|
|
*s = (signed char) simple_strtol(str,&next,base);
|
| 892 |
|
|
} else {
|
| 893 |
|
|
unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
|
| 894 |
|
|
*s = (unsigned char) simple_strtoul(str, &next, base);
|
| 895 |
|
|
}
|
| 896 |
|
|
break;
|
| 897 |
|
|
case 'h':
|
| 898 |
|
|
if (is_sign) {
|
| 899 |
|
|
short *s = (short *) va_arg(args,short *);
|
| 900 |
|
|
*s = (short) simple_strtol(str,&next,base);
|
| 901 |
|
|
} else {
|
| 902 |
|
|
unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
|
| 903 |
|
|
*s = (unsigned short) simple_strtoul(str, &next, base);
|
| 904 |
|
|
}
|
| 905 |
|
|
break;
|
| 906 |
|
|
case 'l':
|
| 907 |
|
|
if (is_sign) {
|
| 908 |
|
|
long *l = (long *) va_arg(args,long *);
|
| 909 |
|
|
*l = simple_strtol(str,&next,base);
|
| 910 |
|
|
} else {
|
| 911 |
|
|
unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
|
| 912 |
|
|
*l = simple_strtoul(str,&next,base);
|
| 913 |
|
|
}
|
| 914 |
|
|
break;
|
| 915 |
|
|
case 'L':
|
| 916 |
|
|
if (is_sign) {
|
| 917 |
|
|
long long *l = (long long*) va_arg(args,long long *);
|
| 918 |
|
|
*l = simple_strtoll(str,&next,base);
|
| 919 |
|
|
} else {
|
| 920 |
|
|
unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
|
| 921 |
|
|
*l = simple_strtoull(str,&next,base);
|
| 922 |
|
|
}
|
| 923 |
|
|
break;
|
| 924 |
|
|
case 'Z':
|
| 925 |
|
|
case 'z':
|
| 926 |
|
|
{
|
| 927 |
|
|
size_t *s = (size_t*) va_arg(args,size_t*);
|
| 928 |
|
|
*s = (size_t) simple_strtoul(str,&next,base);
|
| 929 |
|
|
}
|
| 930 |
|
|
break;
|
| 931 |
|
|
default:
|
| 932 |
|
|
if (is_sign) {
|
| 933 |
|
|
int *i = (int *) va_arg(args, int*);
|
| 934 |
|
|
*i = (int) simple_strtol(str,&next,base);
|
| 935 |
|
|
} else {
|
| 936 |
|
|
unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
|
| 937 |
|
|
*i = (unsigned int) simple_strtoul(str,&next,base);
|
| 938 |
|
|
}
|
| 939 |
|
|
break;
|
| 940 |
|
|
}
|
| 941 |
|
|
num++;
|
| 942 |
|
|
|
| 943 |
|
|
if (!next)
|
| 944 |
|
|
break;
|
| 945 |
|
|
str = next;
|
| 946 |
|
|
}
|
| 947 |
|
|
|
| 948 |
|
|
/*
|
| 949 |
|
|
* Now we've come all the way through so either the input string or the
|
| 950 |
|
|
* format ended. In the former case, there can be a %n at the current
|
| 951 |
|
|
* position in the format that needs to be filled.
|
| 952 |
|
|
*/
|
| 953 |
|
|
if (*fmt == '%' && *(fmt + 1) == 'n') {
|
| 954 |
|
|
int *p = (int *)va_arg(args, int *);
|
| 955 |
|
|
*p = str - buf;
|
| 956 |
|
|
}
|
| 957 |
|
|
|
| 958 |
|
|
return num;
|
| 959 |
|
|
}
|
| 960 |
|
|
|
| 961 |
|
|
EXPORT_SYMBOL(vsscanf);
|
| 962 |
|
|
|
| 963 |
|
|
/**
|
| 964 |
|
|
* sscanf - Unformat a buffer into a list of arguments
|
| 965 |
|
|
* @buf: input buffer
|
| 966 |
|
|
* @fmt: formatting of buffer
|
| 967 |
|
|
* @...: resulting arguments
|
| 968 |
|
|
*/
|
| 969 |
|
|
int sscanf(const char * buf, const char * fmt, ...)
|
| 970 |
|
|
{
|
| 971 |
|
|
va_list args;
|
| 972 |
|
|
int i;
|
| 973 |
|
|
|
| 974 |
|
|
va_start(args,fmt);
|
| 975 |
|
|
i = vsscanf(buf,fmt,args);
|
| 976 |
|
|
va_end(args);
|
| 977 |
|
|
return i;
|
| 978 |
|
|
}
|
| 979 |
|
|
|
| 980 |
|
|
EXPORT_SYMBOL(sscanf);
|
