4 * Copyright (C) 1991, 1992 Linus Torvalds
7 /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
9 * Wirzenius wrote this portably, Torvalds fucked it up :-)
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
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 #include <linux/kallsyms.h>
26 #include <linux/uaccess.h>
27 #include <linux/ioport.h>
29 #include <asm/page.h> /* for PAGE_SIZE */
30 #include <asm/div64.h>
31 #include <asm/sections.h> /* for dereference_function_descriptor() */
33 /* Works only for digits and letters, but small and fast */
34 #define TOLOWER(x) ((x) | 0x20)
36 static unsigned int simple_guess_base(const char *cp)
39 if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
49 * simple_strtoul - convert a string to an unsigned long
50 * @cp: The start of the string
51 * @endp: A pointer to the end of the parsed string will be placed here
52 * @base: The number base to use
54 unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
56 unsigned long result = 0;
59 base = simple_guess_base(cp);
61 if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
64 while (isxdigit(*cp)) {
67 value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
70 result = result * base + value;
78 EXPORT_SYMBOL(simple_strtoul);
81 * simple_strtol - convert a string to a signed 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
86 long simple_strtol(const char *cp, char **endp, unsigned int base)
89 return -simple_strtoul(cp + 1, endp, base);
90 return simple_strtoul(cp, endp, base);
92 EXPORT_SYMBOL(simple_strtol);
95 * simple_strtoull - convert a string to an unsigned long long
96 * @cp: The start of the string
97 * @endp: A pointer to the end of the parsed string will be placed here
98 * @base: The number base to use
100 unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
102 unsigned long long result = 0;
105 base = simple_guess_base(cp);
107 if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
110 while (isxdigit(*cp)) {
113 value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
116 result = result * base + value;
124 EXPORT_SYMBOL(simple_strtoull);
127 * simple_strtoll - convert a string to a signed long long
128 * @cp: The start of the string
129 * @endp: A pointer to the end of the parsed string will be placed here
130 * @base: The number base to use
132 long long simple_strtoll(const char *cp, char **endp, unsigned int base)
135 return -simple_strtoull(cp + 1, endp, base);
136 return simple_strtoull(cp, endp, base);
140 * strict_strtoul - convert a string to an unsigned long strictly
141 * @cp: The string to be converted
142 * @base: The number base to use
143 * @res: The converted result value
145 * strict_strtoul converts a string to an unsigned long only if the
146 * string is really an unsigned long string, any string containing
147 * any invalid char at the tail will be rejected and -EINVAL is returned,
148 * only a newline char at the tail is acceptible because people generally
149 * change a module parameter in the following way:
151 * echo 1024 > /sys/module/e1000/parameters/copybreak
153 * echo will append a newline to the tail.
155 * It returns 0 if conversion is successful and *res is set to the converted
156 * value, otherwise it returns -EINVAL and *res is set to 0.
158 * simple_strtoul just ignores the successive invalid characters and
159 * return the converted value of prefix part of the string.
161 int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
172 val = simple_strtoul(cp, &tail, base);
173 if ((*tail == '\0') ||
174 ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
181 EXPORT_SYMBOL(strict_strtoul);
184 * strict_strtol - convert a string to a long strictly
185 * @cp: The string to be converted
186 * @base: The number base to use
187 * @res: The converted result value
189 * strict_strtol is similiar to strict_strtoul, but it allows the first
190 * character of a string is '-'.
192 * It returns 0 if conversion is successful and *res is set to the converted
193 * value, otherwise it returns -EINVAL and *res is set to 0.
195 int strict_strtol(const char *cp, unsigned int base, long *res)
199 ret = strict_strtoul(cp + 1, base, (unsigned long *)res);
203 ret = strict_strtoul(cp, base, (unsigned long *)res);
208 EXPORT_SYMBOL(strict_strtol);
211 * strict_strtoull - convert a string to an unsigned long long strictly
212 * @cp: The string to be converted
213 * @base: The number base to use
214 * @res: The converted result value
216 * strict_strtoull converts a string to an unsigned long long only if the
217 * string is really an unsigned long long string, any string containing
218 * any invalid char at the tail will be rejected and -EINVAL is returned,
219 * only a newline char at the tail is acceptible because people generally
220 * change a module parameter in the following way:
222 * echo 1024 > /sys/module/e1000/parameters/copybreak
224 * echo will append a newline to the tail of the string.
226 * It returns 0 if conversion is successful and *res is set to the converted
227 * value, otherwise it returns -EINVAL and *res is set to 0.
229 * simple_strtoull just ignores the successive invalid characters and
230 * return the converted value of prefix part of the string.
232 int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res)
235 unsigned long long val;
243 val = simple_strtoull(cp, &tail, base);
244 if ((*tail == '\0') ||
245 ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
252 EXPORT_SYMBOL(strict_strtoull);
255 * strict_strtoll - convert a string to a long long strictly
256 * @cp: The string to be converted
257 * @base: The number base to use
258 * @res: The converted result value
260 * strict_strtoll is similiar to strict_strtoull, but it allows the first
261 * character of a string is '-'.
263 * It returns 0 if conversion is successful and *res is set to the converted
264 * value, otherwise it returns -EINVAL and *res is set to 0.
266 int strict_strtoll(const char *cp, unsigned int base, long long *res)
270 ret = strict_strtoull(cp + 1, base, (unsigned long long *)res);
274 ret = strict_strtoull(cp, base, (unsigned long long *)res);
279 EXPORT_SYMBOL(strict_strtoll);
281 static int skip_atoi(const char **s)
286 i = i*10 + *((*s)++) - '0';
290 /* Decimal conversion is by far the most typical, and is used
291 * for /proc and /sys data. This directly impacts e.g. top performance
292 * with many processes running. We optimize it for speed
294 * http://www.cs.uiowa.edu/~jones/bcd/decimal.html
295 * (with permission from the author, Douglas W. Jones). */
297 /* Formats correctly any integer in [0,99999].
298 * Outputs from one to five digits depending on input.
299 * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
300 static char* put_dec_trunc(char *buf, unsigned q)
302 unsigned d3, d2, d1, d0;
307 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
308 q = (d0 * 0xcd) >> 11;
310 *buf++ = d0 + '0'; /* least significant digit */
311 d1 = q + 9*d3 + 5*d2 + d1;
313 q = (d1 * 0xcd) >> 11;
315 *buf++ = d1 + '0'; /* next digit */
318 if ((d2 != 0) || (d3 != 0)) {
321 *buf++ = d2 + '0'; /* next digit */
325 q = (d3 * 0xcd) >> 11;
327 *buf++ = d3 + '0'; /* next digit */
329 *buf++ = q + '0'; /* most sign. digit */
335 /* Same with if's removed. Always emits five digits */
336 static char* put_dec_full(char *buf, unsigned q)
338 /* BTW, if q is in [0,9999], 8-bit ints will be enough, */
339 /* but anyway, gcc produces better code with full-sized ints */
340 unsigned d3, d2, d1, d0;
345 /* Possible ways to approx. divide by 10 */
346 /* gcc -O2 replaces multiply with shifts and adds */
347 // (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
348 // (x * 0x67) >> 10: 1100111
349 // (x * 0x34) >> 9: 110100 - same
350 // (x * 0x1a) >> 8: 11010 - same
351 // (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
353 d0 = 6*(d3 + d2 + d1) + (q & 0xf);
354 q = (d0 * 0xcd) >> 11;
357 d1 = q + 9*d3 + 5*d2 + d1;
358 q = (d1 * 0xcd) >> 11;
368 q = (d3 * 0xcd) >> 11; /* - shorter code */
369 /* q = (d3 * 0x67) >> 10; - would also work */
375 /* No inlining helps gcc to use registers better */
376 static noinline char* put_dec(char *buf, unsigned long long num)
381 return put_dec_trunc(buf, num);
382 rem = do_div(num, 100000);
383 buf = put_dec_full(buf, rem);
387 #define ZEROPAD 1 /* pad with zero */
388 #define SIGN 2 /* unsigned/signed long */
389 #define PLUS 4 /* show plus */
390 #define SPACE 8 /* space if plus */
391 #define LEFT 16 /* left justified */
392 #define SMALL 32 /* Must be 32 == 0x20 */
393 #define SPECIAL 64 /* 0x */
395 static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type)
397 /* we are called with base 8, 10 or 16, only, thus don't need "G..." */
398 static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
403 int need_pfx = ((type & SPECIAL) && base != 10);
406 /* locase = 0 or 0x20. ORing digits or letters with 'locase'
407 * produces same digits or (maybe lowercased) letters */
408 locase = (type & SMALL);
413 if ((signed long long) num < 0) {
415 num = - (signed long long) num;
417 } else if (type & PLUS) {
420 } else if (type & SPACE) {
431 /* generate full string in tmp[], in reverse order */
435 /* Generic code, for any base:
437 tmp[i++] = (digits[do_div(num,base)] | locase);
440 else if (base != 10) { /* 8 or 16 */
443 if (base == 16) shift = 4;
445 tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
448 } else { /* base 10 */
449 i = put_dec(tmp, num) - tmp;
452 /* printing 100 using %2d gives "100", not "00" */
455 /* leading space padding */
457 if (!(type & (ZEROPAD+LEFT))) {
470 /* "0x" / "0" prefix */
477 *buf = ('X' | locase);
481 /* zero or space padding */
482 if (!(type & LEFT)) {
483 char c = (type & ZEROPAD) ? '0' : ' ';
484 while (--size >= 0) {
490 /* hmm even more zero padding? */
491 while (i <= --precision) {
496 /* actual digits of result */
502 /* trailing space padding */
503 while (--size >= 0) {
511 static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags)
515 if ((unsigned long)s < PAGE_SIZE)
518 len = strnlen(s, precision);
520 if (!(flags & LEFT)) {
521 while (len < field_width--) {
527 for (i = 0; i < len; ++i) {
532 while (len < field_width--) {
540 static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags)
542 unsigned long value = (unsigned long) ptr;
543 #ifdef CONFIG_KALLSYMS
544 char sym[KSYM_SYMBOL_LEN];
545 sprint_symbol(sym, value);
546 return string(buf, end, sym, field_width, precision, flags);
548 field_width = 2*sizeof(void *);
549 flags |= SPECIAL | SMALL | ZEROPAD;
550 return number(buf, end, value, 16, field_width, precision, flags);
554 static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags)
556 #ifndef IO_RSRC_PRINTK_SIZE
557 #define IO_RSRC_PRINTK_SIZE 4
560 #ifndef MEM_RSRC_PRINTK_SIZE
561 #define MEM_RSRC_PRINTK_SIZE 8
564 /* room for the actual numbers, the two "0x", -, [, ] and the final zero */
565 char sym[4*sizeof(resource_size_t) + 8];
566 char *p = sym, *pend = sym + sizeof(sym);
569 if (res->flags & IORESOURCE_IO)
570 size = IO_RSRC_PRINTK_SIZE;
571 else if (res->flags & IORESOURCE_MEM)
572 size = MEM_RSRC_PRINTK_SIZE;
575 p = number(p, pend, res->start, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
577 p = number(p, pend, res->end, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
581 return string(buf, end, sym, field_width, precision, flags);
584 static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
585 int precision, int flags)
587 char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */
591 for (i = 0; i < 6; i++) {
592 p = pack_hex_byte(p, addr[i]);
593 if (!(flags & SPECIAL) && i != 5)
598 return string(buf, end, mac_addr, field_width, precision, flags & ~SPECIAL);
601 static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
602 int precision, int flags)
604 char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */
608 for (i = 0; i < 8; i++) {
609 p = pack_hex_byte(p, addr[2 * i]);
610 p = pack_hex_byte(p, addr[2 * i + 1]);
611 if (!(flags & SPECIAL) && i != 7)
616 return string(buf, end, ip6_addr, field_width, precision, flags & ~SPECIAL);
620 * Show a '%p' thing. A kernel extension is that the '%p' is followed
621 * by an extra set of alphanumeric characters that are extended format
624 * Right now we handle:
626 * - 'F' For symbolic function descriptor pointers
627 * - 'S' For symbolic direct pointers
628 * - 'R' For a struct resource pointer, it prints the range of
629 * addresses (not the name nor the flags)
630 * - 'M' For a 6-byte MAC address, it prints the address in the
631 * usual colon-separated hex notation
632 * - '6' For a IPv6 address prints the address in network-ordered 16 bit hex
633 * with colon separators
635 * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
636 * function pointers are really function descriptors, which contain a
637 * pointer to the real address.
639 static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags)
643 ptr = dereference_function_descriptor(ptr);
646 return symbol_string(buf, end, ptr, field_width, precision, flags);
648 return resource_string(buf, end, ptr, field_width, precision, flags);
650 return mac_address_string(buf, end, ptr, field_width, precision, flags);
652 return ip6_addr_string(buf, end, ptr, field_width, precision, flags);
655 if (field_width == -1) {
656 field_width = 2*sizeof(void *);
659 return number(buf, end, (unsigned long) ptr, 16, field_width, precision, flags);
663 * vsnprintf - Format a string and place it in a buffer
664 * @buf: The buffer to place the result into
665 * @size: The size of the buffer, including the trailing null space
666 * @fmt: The format string to use
667 * @args: Arguments for the format string
669 * This function follows C99 vsnprintf, but has some extensions:
670 * %pS output the name of a text symbol
671 * %pF output the name of a function pointer
672 * %pR output the address range in a struct resource
674 * The return value is the number of characters which would
675 * be generated for the given input, excluding the trailing
676 * '\0', as per ISO C99. If you want to have the exact
677 * number of characters written into @buf as return value
678 * (not including the trailing '\0'), use vscnprintf(). If the
679 * return is greater than or equal to @size, the resulting
680 * string is truncated.
682 * Call this function if you are already dealing with a va_list.
683 * You probably want snprintf() instead.
685 int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
687 unsigned long long num;
691 int flags; /* flags to number() */
693 int field_width; /* width of output field */
694 int precision; /* min. # of digits for integers; max
695 number of chars for from string */
696 int qualifier; /* 'h', 'l', or 'L' for integer fields */
697 /* 'z' support added 23/7/1999 S.H. */
698 /* 'z' changed to 'Z' --davidm 1/25/99 */
699 /* 't' added for ptrdiff_t */
701 /* Reject out-of-range values early. Large positive sizes are
702 used for unknown buffer sizes. */
703 if (unlikely((int) size < 0)) {
704 /* There can be only one.. */
705 static char warn = 1;
714 /* Make sure end is always >= buf */
720 for (; *fmt ; ++fmt) {
731 ++fmt; /* this also skips first '%' */
733 case '-': flags |= LEFT; goto repeat;
734 case '+': flags |= PLUS; goto repeat;
735 case ' ': flags |= SPACE; goto repeat;
736 case '#': flags |= SPECIAL; goto repeat;
737 case '0': flags |= ZEROPAD; goto repeat;
740 /* get field width */
743 field_width = skip_atoi(&fmt);
744 else if (*fmt == '*') {
746 /* it's the next argument */
747 field_width = va_arg(args, int);
748 if (field_width < 0) {
749 field_width = -field_width;
754 /* get the precision */
759 precision = skip_atoi(&fmt);
760 else if (*fmt == '*') {
762 /* it's the next argument */
763 precision = va_arg(args, int);
769 /* get the conversion qualifier */
771 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
772 *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
775 if (qualifier == 'l' && *fmt == 'l') {
786 if (!(flags & LEFT)) {
787 while (--field_width > 0) {
793 c = (unsigned char) va_arg(args, int);
797 while (--field_width > 0) {
805 str = string(str, end, va_arg(args, char *), field_width, precision, flags);
809 str = pointer(fmt+1, str, end,
810 va_arg(args, void *),
811 field_width, precision, flags);
812 /* Skip all alphanumeric pointer suffixes */
813 while (isalnum(fmt[1]))
819 * What does C99 say about the overflow case here? */
820 if (qualifier == 'l') {
821 long * ip = va_arg(args, long *);
823 } else if (qualifier == 'Z' || qualifier == 'z') {
824 size_t * ip = va_arg(args, size_t *);
827 int * ip = va_arg(args, int *);
838 /* integer number formats - set up the flags and "break" */
868 if (qualifier == 'L')
869 num = va_arg(args, long long);
870 else if (qualifier == 'l') {
871 num = va_arg(args, unsigned long);
873 num = (signed long) num;
874 } else if (qualifier == 'Z' || qualifier == 'z') {
875 num = va_arg(args, size_t);
876 } else if (qualifier == 't') {
877 num = va_arg(args, ptrdiff_t);
878 } else if (qualifier == 'h') {
879 num = (unsigned short) va_arg(args, int);
881 num = (signed short) num;
883 num = va_arg(args, unsigned int);
885 num = (signed int) num;
887 str = number(str, end, num, base,
888 field_width, precision, flags);
896 /* the trailing null byte doesn't count towards the total */
899 EXPORT_SYMBOL(vsnprintf);
902 * vscnprintf - Format a string and place it in a buffer
903 * @buf: The buffer to place the result into
904 * @size: The size of the buffer, including the trailing null space
905 * @fmt: The format string to use
906 * @args: Arguments for the format string
908 * The return value is the number of characters which have been written into
909 * the @buf not including the trailing '\0'. If @size is <= 0 the function
912 * Call this function if you are already dealing with a va_list.
913 * You probably want scnprintf() instead.
915 * See the vsnprintf() documentation for format string extensions over C99.
917 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
921 i=vsnprintf(buf,size,fmt,args);
922 return (i >= size) ? (size - 1) : i;
924 EXPORT_SYMBOL(vscnprintf);
927 * snprintf - Format a string and place it in a buffer
928 * @buf: The buffer to place the result into
929 * @size: The size of the buffer, including the trailing null space
930 * @fmt: The format string to use
931 * @...: Arguments for the format string
933 * The return value is the number of characters which would be
934 * generated for the given input, excluding the trailing null,
935 * as per ISO C99. If the return is greater than or equal to
936 * @size, the resulting string is truncated.
938 * See the vsnprintf() documentation for format string extensions over C99.
940 int snprintf(char * buf, size_t size, const char *fmt, ...)
946 i=vsnprintf(buf,size,fmt,args);
950 EXPORT_SYMBOL(snprintf);
953 * scnprintf - Format a string and place it in a buffer
954 * @buf: The buffer to place the result into
955 * @size: The size of the buffer, including the trailing null space
956 * @fmt: The format string to use
957 * @...: Arguments for the format string
959 * The return value is the number of characters written into @buf not including
960 * the trailing '\0'. If @size is <= 0 the function returns 0.
963 int scnprintf(char * buf, size_t size, const char *fmt, ...)
969 i = vsnprintf(buf, size, fmt, args);
971 return (i >= size) ? (size - 1) : i;
973 EXPORT_SYMBOL(scnprintf);
976 * vsprintf - Format a string and place it in a buffer
977 * @buf: The buffer to place the result into
978 * @fmt: The format string to use
979 * @args: Arguments for the format string
981 * The function returns the number of characters written
982 * into @buf. Use vsnprintf() or vscnprintf() in order to avoid
985 * Call this function if you are already dealing with a va_list.
986 * You probably want sprintf() instead.
988 * See the vsnprintf() documentation for format string extensions over C99.
990 int vsprintf(char *buf, const char *fmt, va_list args)
992 return vsnprintf(buf, INT_MAX, fmt, args);
994 EXPORT_SYMBOL(vsprintf);
997 * sprintf - Format a string and place it in a buffer
998 * @buf: The buffer to place the result into
999 * @fmt: The format string to use
1000 * @...: Arguments for the format string
1002 * The function returns the number of characters written
1003 * into @buf. Use snprintf() or scnprintf() in order to avoid
1006 * See the vsnprintf() documentation for format string extensions over C99.
1008 int sprintf(char * buf, const char *fmt, ...)
1013 va_start(args, fmt);
1014 i=vsnprintf(buf, INT_MAX, fmt, args);
1018 EXPORT_SYMBOL(sprintf);
1021 * vsscanf - Unformat a buffer into a list of arguments
1022 * @buf: input buffer
1023 * @fmt: format of buffer
1026 int vsscanf(const char * buf, const char * fmt, va_list args)
1028 const char *str = buf;
1037 while(*fmt && *str) {
1038 /* skip any white space in format */
1039 /* white space in format matchs any amount of
1040 * white space, including none, in the input.
1042 if (isspace(*fmt)) {
1043 while (isspace(*fmt))
1045 while (isspace(*str))
1049 /* anything that is not a conversion must match exactly */
1050 if (*fmt != '%' && *fmt) {
1051 if (*fmt++ != *str++)
1060 /* skip this conversion.
1061 * advance both strings to next white space
1064 while (!isspace(*fmt) && *fmt)
1066 while (!isspace(*str) && *str)
1071 /* get field width */
1074 field_width = skip_atoi(&fmt);
1076 /* get conversion qualifier */
1078 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
1079 *fmt == 'Z' || *fmt == 'z') {
1081 if (unlikely(qualifier == *fmt)) {
1082 if (qualifier == 'h') {
1085 } else if (qualifier == 'l') {
1100 char *s = (char *) va_arg(args,char*);
1101 if (field_width == -1)
1105 } while (--field_width > 0 && *str);
1111 char *s = (char *) va_arg(args, char *);
1112 if(field_width == -1)
1113 field_width = INT_MAX;
1114 /* first, skip leading white space in buffer */
1115 while (isspace(*str))
1118 /* now copy until next white space */
1119 while (*str && !isspace(*str) && field_width--) {
1127 /* return number of characters read so far */
1129 int *i = (int *)va_arg(args,int*);
1147 /* looking for '%' in str */
1152 /* invalid format; stop here */
1156 /* have some sort of integer conversion.
1157 * first, skip white space in buffer.
1159 while (isspace(*str))
1163 if (is_sign && digit == '-')
1167 || (base == 16 && !isxdigit(digit))
1168 || (base == 10 && !isdigit(digit))
1169 || (base == 8 && (!isdigit(digit) || digit > '7'))
1170 || (base == 0 && !isdigit(digit)))
1174 case 'H': /* that's 'hh' in format */
1176 signed char *s = (signed char *) va_arg(args,signed char *);
1177 *s = (signed char) simple_strtol(str,&next,base);
1179 unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
1180 *s = (unsigned char) simple_strtoul(str, &next, base);
1185 short *s = (short *) va_arg(args,short *);
1186 *s = (short) simple_strtol(str,&next,base);
1188 unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
1189 *s = (unsigned short) simple_strtoul(str, &next, base);
1194 long *l = (long *) va_arg(args,long *);
1195 *l = simple_strtol(str,&next,base);
1197 unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
1198 *l = simple_strtoul(str,&next,base);
1203 long long *l = (long long*) va_arg(args,long long *);
1204 *l = simple_strtoll(str,&next,base);
1206 unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
1207 *l = simple_strtoull(str,&next,base);
1213 size_t *s = (size_t*) va_arg(args,size_t*);
1214 *s = (size_t) simple_strtoul(str,&next,base);
1219 int *i = (int *) va_arg(args, int*);
1220 *i = (int) simple_strtol(str,&next,base);
1222 unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
1223 *i = (unsigned int) simple_strtoul(str,&next,base);
1235 * Now we've come all the way through so either the input string or the
1236 * format ended. In the former case, there can be a %n at the current
1237 * position in the format that needs to be filled.
1239 if (*fmt == '%' && *(fmt + 1) == 'n') {
1240 int *p = (int *)va_arg(args, int *);
1246 EXPORT_SYMBOL(vsscanf);
1249 * sscanf - Unformat a buffer into a list of arguments
1250 * @buf: input buffer
1251 * @fmt: formatting of buffer
1252 * @...: resulting arguments
1254 int sscanf(const char * buf, const char * fmt, ...)
1260 i = vsscanf(buf,fmt,args);
1264 EXPORT_SYMBOL(sscanf);