vsprintf: give it some care to please checkpatch.pl
Most relevant complaints were addressed. Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Acked-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
André Goddard Rosa
Linus Torvalds
parent
6c35663411
commit
7b9186f5eb
1 changed files with 98 additions and 86 deletions
184
lib/vsprintf.c
184
lib/vsprintf.c
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@ -9,7 +9,7 @@
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* Wirzenius wrote this portably, Torvalds fucked it up :-)
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*/
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/*
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/*
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* Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
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* - changed to provide snprintf and vsnprintf functions
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* So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de>
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@ -71,9 +71,9 @@ unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
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result = result * base + value;
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cp++;
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}
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if (endp)
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*endp = (char *)cp;
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return result;
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}
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EXPORT_SYMBOL(simple_strtoul);
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@ -86,8 +86,9 @@ EXPORT_SYMBOL(simple_strtoul);
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*/
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long simple_strtol(const char *cp, char **endp, unsigned int base)
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{
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if(*cp == '-')
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if (*cp == '-')
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return -simple_strtoul(cp + 1, endp, base);
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return simple_strtoul(cp, endp, base);
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}
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EXPORT_SYMBOL(simple_strtol);
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@ -117,9 +118,9 @@ unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int bas
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result = result * base + value;
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cp++;
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}
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if (endp)
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*endp = (char *)cp;
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return result;
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}
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EXPORT_SYMBOL(simple_strtoull);
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@ -132,8 +133,9 @@ EXPORT_SYMBOL(simple_strtoull);
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*/
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long long simple_strtoll(const char *cp, char **endp, unsigned int base)
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{
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if(*cp=='-')
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if (*cp == '-')
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return -simple_strtoull(cp + 1, endp, base);
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return simple_strtoull(cp, endp, base);
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}
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@ -173,6 +175,7 @@ int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
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val = simple_strtoul(cp, &tail, base);
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if (tail == cp)
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return -EINVAL;
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if ((*tail == '\0') ||
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((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
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*res = val;
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@ -285,10 +288,11 @@ EXPORT_SYMBOL(strict_strtoll);
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static int skip_atoi(const char **s)
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{
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int i=0;
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int i = 0;
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while (isdigit(**s))
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i = i*10 + *((*s)++) - '0';
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return i;
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}
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@ -302,7 +306,7 @@ static int skip_atoi(const char **s)
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/* Formats correctly any integer in [0,99999].
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* Outputs from one to five digits depending on input.
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* On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
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static char* put_dec_trunc(char *buf, unsigned q)
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static char *put_dec_trunc(char *buf, unsigned q)
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{
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unsigned d3, d2, d1, d0;
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d1 = (q>>4) & 0xf;
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@ -331,14 +335,15 @@ static char* put_dec_trunc(char *buf, unsigned q)
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d3 = d3 - 10*q;
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*buf++ = d3 + '0'; /* next digit */
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if (q != 0)
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*buf++ = q + '0'; /* most sign. digit */
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*buf++ = q + '0'; /* most sign. digit */
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}
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}
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}
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return buf;
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}
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/* Same with if's removed. Always emits five digits */
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static char* put_dec_full(char *buf, unsigned q)
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static char *put_dec_full(char *buf, unsigned q)
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{
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/* BTW, if q is in [0,9999], 8-bit ints will be enough, */
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/* but anyway, gcc produces better code with full-sized ints */
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@ -347,14 +352,15 @@ static char* put_dec_full(char *buf, unsigned q)
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d2 = (q>>8) & 0xf;
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d3 = (q>>12);
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/* Possible ways to approx. divide by 10 */
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/* gcc -O2 replaces multiply with shifts and adds */
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// (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
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// (x * 0x67) >> 10: 1100111
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// (x * 0x34) >> 9: 110100 - same
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// (x * 0x1a) >> 8: 11010 - same
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// (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
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/*
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* Possible ways to approx. divide by 10
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* gcc -O2 replaces multiply with shifts and adds
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* (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
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* (x * 0x67) >> 10: 1100111
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* (x * 0x34) >> 9: 110100 - same
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* (x * 0x1a) >> 8: 11010 - same
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* (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
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*/
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d0 = 6*(d3 + d2 + d1) + (q & 0xf);
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q = (d0 * 0xcd) >> 11;
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d0 = d0 - 10*q;
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@ -375,10 +381,11 @@ static char* put_dec_full(char *buf, unsigned q)
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d3 = d3 - 10*q;
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*buf++ = d3 + '0';
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*buf++ = q + '0';
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return buf;
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}
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/* No inlining helps gcc to use registers better */
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static noinline char* put_dec(char *buf, unsigned long long num)
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static noinline char *put_dec(char *buf, unsigned long long num)
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{
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while (1) {
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unsigned rem;
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@ -448,9 +455,9 @@ static char *number(char *buf, char *end, unsigned long long num,
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spec.flags &= ~ZEROPAD;
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sign = 0;
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if (spec.flags & SIGN) {
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if ((signed long long) num < 0) {
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if ((signed long long)num < 0) {
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sign = '-';
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num = - (signed long long) num;
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num = -(signed long long)num;
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spec.field_width--;
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} else if (spec.flags & PLUS) {
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sign = '+';
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@ -478,7 +485,9 @@ static char *number(char *buf, char *end, unsigned long long num,
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else if (spec.base != 10) { /* 8 or 16 */
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int mask = spec.base - 1;
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int shift = 3;
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if (spec.base == 16) shift = 4;
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if (spec.base == 16)
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shift = 4;
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do {
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tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
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num >>= shift;
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@ -493,7 +502,7 @@ static char *number(char *buf, char *end, unsigned long long num,
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/* leading space padding */
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spec.field_width -= spec.precision;
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if (!(spec.flags & (ZEROPAD+LEFT))) {
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while(--spec.field_width >= 0) {
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while (--spec.field_width >= 0) {
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if (buf < end)
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*buf = ' ';
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++buf;
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@ -543,6 +552,7 @@ static char *number(char *buf, char *end, unsigned long long num,
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*buf = ' ';
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++buf;
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}
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return buf;
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}
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@ -572,6 +582,7 @@ static char *string(char *buf, char *end, const char *s, struct printf_spec spec
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*buf = ' ';
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++buf;
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}
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return buf;
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}
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@ -585,11 +596,13 @@ static char *symbol_string(char *buf, char *end, void *ptr,
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sprint_symbol(sym, value);
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else
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kallsyms_lookup(value, NULL, NULL, NULL, sym);
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return string(buf, end, sym, spec);
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#else
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spec.field_width = 2*sizeof(void *);
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spec.field_width = 2 * sizeof(void *);
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spec.flags |= SPECIAL | SMALL | ZEROPAD;
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spec.base = 16;
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return number(buf, end, value, spec);
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#endif
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}
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@ -718,22 +731,19 @@ static char *ip4_string(char *p, const u8 *addr, bool leading_zeros)
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if (i < 3)
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*p++ = '.';
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}
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*p = '\0';
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return p;
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}
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static char *ip6_compressed_string(char *p, const char *addr)
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{
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int i;
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int j;
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int range;
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int i, j, range;
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unsigned char zerolength[8];
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int longest = 1;
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int colonpos = -1;
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u16 word;
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u8 hi;
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u8 lo;
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u8 hi, lo;
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bool needcolon = false;
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bool useIPv4;
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struct in6_addr in6;
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@ -800,22 +810,23 @@ static char *ip6_compressed_string(char *p, const char *addr)
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*p++ = ':';
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p = ip4_string(p, &in6.s6_addr[12], false);
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}
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*p = '\0';
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return p;
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}
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static char *ip6_string(char *p, const char *addr, const char *fmt)
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{
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int i;
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for (i = 0; i < 8; i++) {
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p = pack_hex_byte(p, *addr++);
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p = pack_hex_byte(p, *addr++);
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if (fmt[0] == 'I' && i != 7)
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*p++ = ':';
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}
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*p = '\0';
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return p;
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}
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@ -1322,7 +1333,8 @@ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
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{
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int i;
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i=vsnprintf(buf,size,fmt,args);
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i = vsnprintf(buf, size, fmt, args);
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return (i >= size) ? (size - 1) : i;
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}
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EXPORT_SYMBOL(vscnprintf);
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@ -1341,14 +1353,15 @@ EXPORT_SYMBOL(vscnprintf);
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*
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* See the vsnprintf() documentation for format string extensions over C99.
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*/
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int snprintf(char * buf, size_t size, const char *fmt, ...)
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int snprintf(char *buf, size_t size, const char *fmt, ...)
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{
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va_list args;
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int i;
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va_start(args, fmt);
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i=vsnprintf(buf,size,fmt,args);
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i = vsnprintf(buf, size, fmt, args);
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va_end(args);
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return i;
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}
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EXPORT_SYMBOL(snprintf);
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@ -1364,7 +1377,7 @@ EXPORT_SYMBOL(snprintf);
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* the trailing '\0'. If @size is <= 0 the function returns 0.
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*/
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int scnprintf(char * buf, size_t size, const char *fmt, ...)
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int scnprintf(char *buf, size_t size, const char *fmt, ...)
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{
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va_list args;
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int i;
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@ -1372,6 +1385,7 @@ int scnprintf(char * buf, size_t size, const char *fmt, ...)
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va_start(args, fmt);
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i = vsnprintf(buf, size, fmt, args);
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va_end(args);
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return (i >= size) ? (size - 1) : i;
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}
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EXPORT_SYMBOL(scnprintf);
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@ -1409,14 +1423,15 @@ EXPORT_SYMBOL(vsprintf);
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*
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* See the vsnprintf() documentation for format string extensions over C99.
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*/
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int sprintf(char * buf, const char *fmt, ...)
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int sprintf(char *buf, const char *fmt, ...)
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{
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va_list args;
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int i;
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va_start(args, fmt);
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i=vsnprintf(buf, INT_MAX, fmt, args);
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i = vsnprintf(buf, INT_MAX, fmt, args);
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va_end(args);
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return i;
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}
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EXPORT_SYMBOL(sprintf);
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@ -1474,7 +1489,6 @@ do { \
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str += sizeof(type); \
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} while (0)
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while (*fmt) {
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read = format_decode(fmt, &spec);
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@ -1562,8 +1576,8 @@ do { \
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}
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}
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}
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return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
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return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
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#undef save_arg
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}
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EXPORT_SYMBOL_GPL(vbin_printf);
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@ -1595,7 +1609,6 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
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unsigned long long num;
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char *str, *end, c;
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const char *args = (const char *)bin_buf;
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struct printf_spec spec = {0};
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if (WARN_ON_ONCE((int) size < 0))
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@ -1775,6 +1788,7 @@ int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...)
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va_start(args, fmt);
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ret = vbin_printf(bin_buf, size, fmt, args);
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va_end(args);
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return ret;
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}
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EXPORT_SYMBOL_GPL(bprintf);
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@ -1787,18 +1801,16 @@ EXPORT_SYMBOL_GPL(bprintf);
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* @fmt: format of buffer
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* @args: arguments
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*/
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int vsscanf(const char * buf, const char * fmt, va_list args)
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int vsscanf(const char *buf, const char *fmt, va_list args)
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{
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const char *str = buf;
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char *next;
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char digit;
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int num = 0;
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int qualifier;
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int base;
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int field_width;
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int qualifier, base, field_width;
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int is_sign = 0;
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while(*fmt && *str) {
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while (*fmt && *str) {
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/* skip any white space in format */
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/* white space in format matchs any amount of
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* white space, including none, in the input.
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@ -1820,7 +1832,7 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
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if (!*fmt)
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break;
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++fmt;
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/* skip this conversion.
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* advance both strings to next white space
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*/
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@ -1858,10 +1870,10 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
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if (!*fmt || !*str)
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break;
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switch(*fmt++) {
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switch (*fmt++) {
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case 'c':
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{
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char *s = (char *) va_arg(args,char*);
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char *s = (char *)va_arg(args, char*);
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if (field_width == -1)
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field_width = 1;
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do {
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|
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@ -1872,17 +1884,16 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
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continue;
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case 's':
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{
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char *s = (char *) va_arg(args, char *);
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if(field_width == -1)
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char *s = (char *)va_arg(args, char *);
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if (field_width == -1)
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field_width = INT_MAX;
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/* first, skip leading white space in buffer */
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while (isspace(*str))
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str++;
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/* now copy until next white space */
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while (*str && !isspace(*str) && field_width--) {
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while (*str && !isspace(*str) && field_width--)
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*s++ = *str++;
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}
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*s = '\0';
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num++;
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}
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@ -1890,7 +1901,7 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
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case 'n':
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/* return number of characters read so far */
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{
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int *i = (int *)va_arg(args,int*);
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int *i = (int *)va_arg(args, int*);
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*i = str - buf;
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}
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continue;
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@ -1902,14 +1913,14 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
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base = 16;
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break;
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case 'i':
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base = 0;
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base = 0;
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case 'd':
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is_sign = 1;
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case 'u':
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break;
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case '%':
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/* looking for '%' in str */
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if (*str++ != '%')
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if (*str++ != '%')
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return num;
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continue;
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default:
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@ -1928,63 +1939,63 @@ int vsscanf(const char * buf, const char * fmt, va_list args)
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digit = *(str + 1);
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if (!digit
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|| (base == 16 && !isxdigit(digit))
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|| (base == 10 && !isdigit(digit))
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|| (base == 8 && (!isdigit(digit) || digit > '7'))
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|| (base == 0 && !isdigit(digit)))
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break;
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||||
|| (base == 16 && !isxdigit(digit))
|
||||
|| (base == 10 && !isdigit(digit))
|
||||
|| (base == 8 && (!isdigit(digit) || digit > '7'))
|
||||
|| (base == 0 && !isdigit(digit)))
|
||||
break;
|
||||
|
||||
switch(qualifier) {
|
||||
switch (qualifier) {
|
||||
case 'H': /* that's 'hh' in format */
|
||||
if (is_sign) {
|
||||
signed char *s = (signed char *) va_arg(args,signed char *);
|
||||
*s = (signed char) simple_strtol(str,&next,base);
|
||||
signed char *s = (signed char *)va_arg(args, signed char *);
|
||||
*s = (signed char)simple_strtol(str, &next, base);
|
||||
} else {
|
||||
unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
|
||||
*s = (unsigned char) simple_strtoul(str, &next, base);
|
||||
unsigned char *s = (unsigned char *)va_arg(args, unsigned char *);
|
||||
*s = (unsigned char)simple_strtoul(str, &next, base);
|
||||
}
|
||||
break;
|
||||
case 'h':
|
||||
if (is_sign) {
|
||||
short *s = (short *) va_arg(args,short *);
|
||||
*s = (short) simple_strtol(str,&next,base);
|
||||
short *s = (short *)va_arg(args, short *);
|
||||
*s = (short)simple_strtol(str, &next, base);
|
||||
} else {
|
||||
unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
|
||||
*s = (unsigned short) simple_strtoul(str, &next, base);
|
||||
unsigned short *s = (unsigned short *)va_arg(args, unsigned short *);
|
||||
*s = (unsigned short)simple_strtoul(str, &next, base);
|
||||
}
|
||||
break;
|
||||
case 'l':
|
||||
if (is_sign) {
|
||||
long *l = (long *) va_arg(args,long *);
|
||||
*l = simple_strtol(str,&next,base);
|
||||
long *l = (long *)va_arg(args, long *);
|
||||
*l = simple_strtol(str, &next, base);
|
||||
} else {
|
||||
unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
|
||||
*l = simple_strtoul(str,&next,base);
|
||||
unsigned long *l = (unsigned long *)va_arg(args, unsigned long *);
|
||||
*l = simple_strtoul(str, &next, base);
|
||||
}
|
||||
break;
|
||||
case 'L':
|
||||
if (is_sign) {
|
||||
long long *l = (long long*) va_arg(args,long long *);
|
||||
*l = simple_strtoll(str,&next,base);
|
||||
long long *l = (long long *)va_arg(args, long long *);
|
||||
*l = simple_strtoll(str, &next, base);
|
||||
} else {
|
||||
unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
|
||||
*l = simple_strtoull(str,&next,base);
|
||||
unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *);
|
||||
*l = simple_strtoull(str, &next, base);
|
||||
}
|
||||
break;
|
||||
case 'Z':
|
||||
case 'z':
|
||||
{
|
||||
size_t *s = (size_t*) va_arg(args,size_t*);
|
||||
*s = (size_t) simple_strtoul(str,&next,base);
|
||||
size_t *s = (size_t *)va_arg(args, size_t *);
|
||||
*s = (size_t)simple_strtoul(str, &next, base);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
if (is_sign) {
|
||||
int *i = (int *) va_arg(args, int*);
|
||||
*i = (int) simple_strtol(str,&next,base);
|
||||
int *i = (int *)va_arg(args, int *);
|
||||
*i = (int)simple_strtol(str, &next, base);
|
||||
} else {
|
||||
unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
|
||||
*i = (unsigned int) simple_strtoul(str,&next,base);
|
||||
unsigned int *i = (unsigned int *)va_arg(args, unsigned int*);
|
||||
*i = (unsigned int)simple_strtoul(str, &next, base);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
|
@ -2015,14 +2026,15 @@ EXPORT_SYMBOL(vsscanf);
|
|||
* @fmt: formatting of buffer
|
||||
* @...: resulting arguments
|
||||
*/
|
||||
int sscanf(const char * buf, const char * fmt, ...)
|
||||
int sscanf(const char *buf, const char *fmt, ...)
|
||||
{
|
||||
va_list args;
|
||||
int i;
|
||||
|
||||
va_start(args,fmt);
|
||||
i = vsscanf(buf,fmt,args);
|
||||
va_start(args, fmt);
|
||||
i = vsscanf(buf, fmt, args);
|
||||
va_end(args);
|
||||
|
||||
return i;
|
||||
}
|
||||
EXPORT_SYMBOL(sscanf);
|
||||
|
|
|
|||
Loading…
Reference in a new issue