--- a/include/linux/ctype.h
+++ b/include/linux/ctype.h
@@ -52,4 +52,13 @@ static inline unsigned char __toupper(un
#define tolower(c) __tolower(c)
#define toupper(c) __toupper(c)
+/*
+ * Fast implementation of tolower() for internal usage. Do not use in your
+ * code.
+ */
+static inline char _tolower(const char c)
+{
+ return c | 0x20;
+}
+
#endif
--- a/lib/kstrtox.c
+++ b/lib/kstrtox.c
@@ -18,31 +18,40 @@
#include <linux/module.h>
#include <linux/types.h>
#include <asm/uaccess.h>
+#include "kstrtox.h"
-static inline char _tolower(const char c)
+const char *_parse_integer_fixup_radix(const char *s, unsigned int *base)
{
- return c | 0x20;
-}
-
-static int _kstrtoull(const char *s, unsigned int base, unsigned long long *res)
-{
- unsigned long long acc;
- int ok;
-
- if (base == 0) {
+ if (*base == 0) {
if (s[0] == '0') {
if (_tolower(s[1]) == 'x' && isxdigit(s[2]))
- base = 16;
+ *base = 16;
else
- base = 8;
+ *base = 8;
} else
- base = 10;
+ *base = 10;
}
- if (base == 16 && s[0] == '0' && _tolower(s[1]) == 'x')
+ if (*base == 16 && s[0] == '0' && _tolower(s[1]) == 'x')
s += 2;
+ return s;
+}
+
+/*
+ * Convert non-negative integer string representation in explicitly given radix
+ * to an integer.
+ * Return number of characters consumed maybe or-ed with overflow bit.
+ * If overflow occurs, result integer (incorrect) is still returned.
+ *
+ * Don't you dare use this function.
+ */
+unsigned int _parse_integer(const char *s, unsigned int base, unsigned long long *res)
+{
+ unsigned int rv;
+ int overflow;
- acc = 0;
- ok = 0;
+ *res = 0;
+ rv = 0;
+ overflow = 0;
while (*s) {
unsigned int val;
@@ -50,23 +59,40 @@ static int _kstrtoull(const char *s, uns
val = *s - '0';
else if ('a' <= _tolower(*s) && _tolower(*s) <= 'f')
val = _tolower(*s) - 'a' + 10;
- else if (*s == '\n' && *(s + 1) == '\0')
- break;
else
- return -EINVAL;
+ break;
if (val >= base)
- return -EINVAL;
- if (acc > div_u64(ULLONG_MAX - val, base))
- return -ERANGE;
- acc = acc * base + val;
- ok = 1;
-
+ break;
+ if (*res > div_u64(ULLONG_MAX - val, base))
+ overflow = 1;
+ *res = *res * base + val;
+ rv++;
s++;
}
- if (!ok)
+ if (overflow)
+ rv |= KSTRTOX_OVERFLOW;
+ return rv;
+}
+
+static int _kstrtoull(const char *s, unsigned int base, unsigned long long *res)
+{
+ unsigned long long _res;
+ unsigned int rv;
+
+ s = _parse_integer_fixup_radix(s, &base);
+ rv = _parse_integer(s, base, &_res);
+ if (rv & KSTRTOX_OVERFLOW)
+ return -ERANGE;
+ rv &= ~KSTRTOX_OVERFLOW;
+ if (rv == 0)
+ return -EINVAL;
+ s += rv;
+ if (*s == '\n')
+ s++;
+ if (*s)
return -EINVAL;
- *res = acc;
+ *res = _res;
return 0;
}
--- /dev/null
+++ b/lib/kstrtox.h
@@ -0,0 +1,8 @@
+#ifndef _LIB_KSTRTOX_H
+#define _LIB_KSTRTOX_H
+
+#define KSTRTOX_OVERFLOW (1U << 31)
+const char *_parse_integer_fixup_radix(const char *s, unsigned int *base);
+unsigned int _parse_integer(const char *s, unsigned int base, unsigned long long *res);
+
+#endif
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -31,20 +31,7 @@
#include <asm/div64.h>
#include <asm/sections.h> /* for dereference_function_descriptor() */
-/* Works only for digits and letters, but small and fast */
-#define TOLOWER(x) ((x) | 0x20)
-
-static unsigned int simple_guess_base(const char *cp)
-{
- if (cp[0] == '0') {
- if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2]))
- return 16;
- else
- return 8;
- } else {
- return 10;
- }
-}
+#include "kstrtox.h"
/**
* simple_strtoull - convert a string to an unsigned long long
@@ -54,23 +41,14 @@ static unsigned int simple_guess_base(co
*/
unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
{
- unsigned long long result = 0;
+ unsigned long long result;
+ unsigned int rv;
- if (!base)
- base = simple_guess_base(cp);
+ cp = _parse_integer_fixup_radix(cp, &base);
+ rv = _parse_integer(cp, base, &result);
+ /* FIXME */
+ cp += (rv & ~KSTRTOX_OVERFLOW);
- if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x')
- cp += 2;
-
- while (isxdigit(*cp)) {
- unsigned int value;
-
- value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10;
- if (value >= base)
- break;
- result = result * base + value;
- cp++;
- }
if (endp)
*endp = (char *)cp;
@@ -1010,9 +988,15 @@ char *pointer(const char *fmt, char *buf
case 'U':
return uuid_string(buf, end, ptr, spec, fmt);
case 'V':
- return buf + vsnprintf(buf, end > buf ? end - buf : 0,
- ((struct va_format *)ptr)->fmt,
- *(((struct va_format *)ptr)->va));
+ {
+ va_list va;
+
+ va_copy(va, *((struct va_format *)ptr)->va);
+ buf += vsnprintf(buf, end > buf ? end - buf : 0,
+ ((struct va_format *)ptr)->fmt, va);
+ va_end(va);
+ return buf;
+ }
case 'K':
/*
* %pK cannot be used in IRQ context because its test
@@ -1146,8 +1130,8 @@ precision:
qualifier:
/* get the conversion qualifier */
spec->qualifier = -1;
- if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
- TOLOWER(*fmt) == 'z' || *fmt == 't') {
+ if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
+ _tolower(*fmt) == 'z' || *fmt == 't') {
spec->qualifier = *fmt++;
if (unlikely(spec->qualifier == *fmt)) {
if (spec->qualifier == 'l') {
@@ -1214,7 +1198,7 @@ qualifier:
spec->type = FORMAT_TYPE_LONG;
else
spec->type = FORMAT_TYPE_ULONG;
- } else if (TOLOWER(spec->qualifier) == 'z') {
+ } else if (_tolower(spec->qualifier) == 'z') {
spec->type = FORMAT_TYPE_SIZE_T;
} else if (spec->qualifier == 't') {
spec->type = FORMAT_TYPE_PTRDIFF;
@@ -1259,8 +1243,7 @@ qualifier:
* %pi4 print an IPv4 address with leading zeros
* %pI6 print an IPv6 address with colons
* %pi6 print an IPv6 address without colons
- * %pI6c print an IPv6 address as specified by
- * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00
+ * %pI6c print an IPv6 address as specified by RFC 5952
* %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper
* case.
* %n is ignored
@@ -1373,7 +1356,7 @@ int vsnprintf(char *buf, size_t size, co
if (qualifier == 'l') {
long *ip = va_arg(args, long *);
*ip = (str - buf);
- } else if (TOLOWER(qualifier) == 'z') {
+ } else if (_tolower(qualifier) == 'z') {
size_t *ip = va_arg(args, size_t *);
*ip = (str - buf);
} else {
@@ -1660,7 +1643,7 @@ do { \
void *skip_arg;
if (qualifier == 'l')
skip_arg = va_arg(args, long *);
- else if (TOLOWER(qualifier) == 'z')
+ else if (_tolower(qualifier) == 'z')
skip_arg = va_arg(args, size_t *);
else
skip_arg = va_arg(args, int *);
@@ -1966,8 +1949,8 @@ int vsscanf(const char *buf, const char
/* get conversion qualifier */
qualifier = -1;
- if (*fmt == 'h' || TOLOWER(*fmt) == 'l' ||
- TOLOWER(*fmt) == 'z') {
+ if (*fmt == 'h' || _tolower(*fmt) == 'l' ||
+ _tolower(*fmt) == 'z') {
qualifier = *fmt++;
if (unlikely(qualifier == *fmt)) {
if (qualifier == 'h') {
projects / ziggy471-sgn2-jb.git / commitdiff