#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
+#include <linux/kallsyms.h>
+#include <linux/uaccess.h>
+#include <linux/ioport.h>
#include <asm/page.h> /* for PAGE_SIZE */
#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;
+ }
+}
/**
* simple_strtoul - convert a string to an unsigned long
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
+unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base)
{
- unsigned long result = 0,value;
+ unsigned long result = 0;
- if (!base) {
- base = 10;
- if (*cp == '0') {
- base = 8;
- cp++;
- if ((toupper(*cp) == 'X') && isxdigit(cp[1])) {
- cp++;
- base = 16;
- }
- }
- } else if (base == 16) {
- if (cp[0] == '0' && toupper(cp[1]) == 'X')
- cp += 2;
- }
- while (isxdigit(*cp) &&
- (value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
- result = result*base + value;
+ if (!base)
+ base = simple_guess_base(cp);
+
+ 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;
return result;
}
-
EXPORT_SYMBOL(simple_strtoul);
/**
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-long simple_strtol(const char *cp,char **endp,unsigned int base)
+long simple_strtol(const char *cp, char **endp, unsigned int base)
{
- if(*cp=='-')
- return -simple_strtoul(cp+1,endp,base);
- return simple_strtoul(cp,endp,base);
+ if(*cp == '-')
+ return -simple_strtoul(cp + 1, endp, base);
+ return simple_strtoul(cp, endp, base);
}
-
EXPORT_SYMBOL(simple_strtol);
/**
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base)
+unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base)
{
- unsigned long long result = 0,value;
+ unsigned long long result = 0;
- if (!base) {
- base = 10;
- if (*cp == '0') {
- base = 8;
- cp++;
- if ((toupper(*cp) == 'X') && isxdigit(cp[1])) {
- cp++;
- base = 16;
- }
- }
- } else if (base == 16) {
- if (cp[0] == '0' && toupper(cp[1]) == 'X')
- cp += 2;
- }
- while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
- ? toupper(*cp) : *cp)-'A'+10) < base) {
- result = result*base + value;
+ if (!base)
+ base = simple_guess_base(cp);
+
+ 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;
return result;
}
-
EXPORT_SYMBOL(simple_strtoull);
/**
* @endp: A pointer to the end of the parsed string will be placed here
* @base: The number base to use
*/
-long long simple_strtoll(const char *cp,char **endp,unsigned int base)
+long long simple_strtoll(const char *cp, char **endp, unsigned int base)
{
if(*cp=='-')
- return -simple_strtoull(cp+1,endp,base);
- return simple_strtoull(cp,endp,base);
+ return -simple_strtoull(cp + 1, endp, base);
+ return simple_strtoull(cp, endp, base);
}
+/**
+ * strict_strtoul - convert a string to an unsigned long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtoul converts a string to an unsigned long only if the
+ * string is really an unsigned long string, any string containing
+ * any invalid char at the tail will be rejected and -EINVAL is returned,
+ * only a newline char at the tail is acceptible because people generally
+ * change a module parameter in the following way:
+ *
+ * echo 1024 > /sys/module/e1000/parameters/copybreak
+ *
+ * echo will append a newline to the tail.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ *
+ * simple_strtoul just ignores the successive invalid characters and
+ * return the converted value of prefix part of the string.
+ */
+int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
+{
+ char *tail;
+ unsigned long val;
+ size_t len;
+
+ *res = 0;
+ len = strlen(cp);
+ if (len == 0)
+ return -EINVAL;
+
+ val = simple_strtoul(cp, &tail, base);
+ if (tail == cp)
+ return -EINVAL;
+ if ((*tail == '\0') ||
+ ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+ *res = val;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(strict_strtoul);
+
+/**
+ * strict_strtol - convert a string to a long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtol is similiar to strict_strtoul, but it allows the first
+ * character of a string is '-'.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ */
+int strict_strtol(const char *cp, unsigned int base, long *res)
+{
+ int ret;
+ if (*cp == '-') {
+ ret = strict_strtoul(cp + 1, base, (unsigned long *)res);
+ if (!ret)
+ *res = -(*res);
+ } else {
+ ret = strict_strtoul(cp, base, (unsigned long *)res);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(strict_strtol);
+
+/**
+ * strict_strtoull - convert a string to an unsigned long long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtoull converts a string to an unsigned long long only if the
+ * string is really an unsigned long long string, any string containing
+ * any invalid char at the tail will be rejected and -EINVAL is returned,
+ * only a newline char at the tail is acceptible because people generally
+ * change a module parameter in the following way:
+ *
+ * echo 1024 > /sys/module/e1000/parameters/copybreak
+ *
+ * echo will append a newline to the tail of the string.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ *
+ * simple_strtoull just ignores the successive invalid characters and
+ * return the converted value of prefix part of the string.
+ */
+int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res)
+{
+ char *tail;
+ unsigned long long val;
+ size_t len;
+
+ *res = 0;
+ len = strlen(cp);
+ if (len == 0)
+ return -EINVAL;
+
+ val = simple_strtoull(cp, &tail, base);
+ if (tail == cp)
+ return -EINVAL;
+ if ((*tail == '\0') ||
+ ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
+ *res = val;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(strict_strtoull);
+
+/**
+ * strict_strtoll - convert a string to a long long strictly
+ * @cp: The string to be converted
+ * @base: The number base to use
+ * @res: The converted result value
+ *
+ * strict_strtoll is similiar to strict_strtoull, but it allows the first
+ * character of a string is '-'.
+ *
+ * It returns 0 if conversion is successful and *res is set to the converted
+ * value, otherwise it returns -EINVAL and *res is set to 0.
+ */
+int strict_strtoll(const char *cp, unsigned int base, long long *res)
+{
+ int ret;
+ if (*cp == '-') {
+ ret = strict_strtoull(cp + 1, base, (unsigned long long *)res);
+ if (!ret)
+ *res = -(*res);
+ } else {
+ ret = strict_strtoull(cp, base, (unsigned long long *)res);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(strict_strtoll);
+
static int skip_atoi(const char **s)
{
int i=0;
return i;
}
+/* Decimal conversion is by far the most typical, and is used
+ * for /proc and /sys data. This directly impacts e.g. top performance
+ * with many processes running. We optimize it for speed
+ * using code from
+ * http://www.cs.uiowa.edu/~jones/bcd/decimal.html
+ * (with permission from the author, Douglas W. Jones). */
+
+/* Formats correctly any integer in [0,99999].
+ * Outputs from one to five digits depending on input.
+ * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */
+static char* put_dec_trunc(char *buf, unsigned q)
+{
+ unsigned d3, d2, d1, d0;
+ d1 = (q>>4) & 0xf;
+ d2 = (q>>8) & 0xf;
+ d3 = (q>>12);
+
+ d0 = 6*(d3 + d2 + d1) + (q & 0xf);
+ q = (d0 * 0xcd) >> 11;
+ d0 = d0 - 10*q;
+ *buf++ = d0 + '0'; /* least significant digit */
+ d1 = q + 9*d3 + 5*d2 + d1;
+ if (d1 != 0) {
+ q = (d1 * 0xcd) >> 11;
+ d1 = d1 - 10*q;
+ *buf++ = d1 + '0'; /* next digit */
+
+ d2 = q + 2*d2;
+ if ((d2 != 0) || (d3 != 0)) {
+ q = (d2 * 0xd) >> 7;
+ d2 = d2 - 10*q;
+ *buf++ = d2 + '0'; /* next digit */
+
+ d3 = q + 4*d3;
+ if (d3 != 0) {
+ q = (d3 * 0xcd) >> 11;
+ d3 = d3 - 10*q;
+ *buf++ = d3 + '0'; /* next digit */
+ if (q != 0)
+ *buf++ = q + '0'; /* most sign. digit */
+ }
+ }
+ }
+ return buf;
+}
+/* Same with if's removed. Always emits five digits */
+static char* put_dec_full(char *buf, unsigned q)
+{
+ /* BTW, if q is in [0,9999], 8-bit ints will be enough, */
+ /* but anyway, gcc produces better code with full-sized ints */
+ unsigned d3, d2, d1, d0;
+ d1 = (q>>4) & 0xf;
+ d2 = (q>>8) & 0xf;
+ d3 = (q>>12);
+
+ /* Possible ways to approx. divide by 10 */
+ /* gcc -O2 replaces multiply with shifts and adds */
+ // (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386)
+ // (x * 0x67) >> 10: 1100111
+ // (x * 0x34) >> 9: 110100 - same
+ // (x * 0x1a) >> 8: 11010 - same
+ // (x * 0x0d) >> 7: 1101 - same, shortest code (on i386)
+
+ d0 = 6*(d3 + d2 + d1) + (q & 0xf);
+ q = (d0 * 0xcd) >> 11;
+ d0 = d0 - 10*q;
+ *buf++ = d0 + '0';
+ d1 = q + 9*d3 + 5*d2 + d1;
+ q = (d1 * 0xcd) >> 11;
+ d1 = d1 - 10*q;
+ *buf++ = d1 + '0';
+
+ d2 = q + 2*d2;
+ q = (d2 * 0xd) >> 7;
+ d2 = d2 - 10*q;
+ *buf++ = d2 + '0';
+
+ d3 = q + 4*d3;
+ q = (d3 * 0xcd) >> 11; /* - shorter code */
+ /* q = (d3 * 0x67) >> 10; - would also work */
+ d3 = d3 - 10*q;
+ *buf++ = d3 + '0';
+ *buf++ = q + '0';
+ return buf;
+}
+/* No inlining helps gcc to use registers better */
+static noinline char* put_dec(char *buf, unsigned long long num)
+{
+ while (1) {
+ unsigned rem;
+ if (num < 100000)
+ return put_dec_trunc(buf, num);
+ rem = do_div(num, 100000);
+ buf = put_dec_full(buf, rem);
+ }
+}
+
#define ZEROPAD 1 /* pad with zero */
#define SIGN 2 /* unsigned/signed long */
#define PLUS 4 /* show plus */
#define SPACE 8 /* space if plus */
#define LEFT 16 /* left justified */
-#define SPECIAL 32 /* 0x */
-#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
-
-static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type)
+#define SMALL 32 /* Must be 32 == 0x20 */
+#define SPECIAL 64 /* 0x */
+
+enum format_type {
+ FORMAT_TYPE_NONE, /* Just a string part */
+ FORMAT_TYPE_WIDTH,
+ FORMAT_TYPE_PRECISION,
+ FORMAT_TYPE_CHAR,
+ FORMAT_TYPE_STR,
+ FORMAT_TYPE_PTR,
+ FORMAT_TYPE_PERCENT_CHAR,
+ FORMAT_TYPE_INVALID,
+ FORMAT_TYPE_LONG_LONG,
+ FORMAT_TYPE_ULONG,
+ FORMAT_TYPE_LONG,
+ FORMAT_TYPE_UBYTE,
+ FORMAT_TYPE_BYTE,
+ FORMAT_TYPE_USHORT,
+ FORMAT_TYPE_SHORT,
+ FORMAT_TYPE_UINT,
+ FORMAT_TYPE_INT,
+ FORMAT_TYPE_NRCHARS,
+ FORMAT_TYPE_SIZE_T,
+ FORMAT_TYPE_PTRDIFF
+};
+
+struct printf_spec {
+ enum format_type type;
+ int flags; /* flags to number() */
+ int field_width; /* width of output field */
+ int base;
+ int precision; /* # of digits/chars */
+ int qualifier;
+};
+
+static char *number(char *buf, char *end, unsigned long long num,
+ struct printf_spec spec)
{
- char sign,tmp[66];
- const char *digits;
- /* we are called with base 8, 10 or 16, only, thus don't need "g..." */
- static const char small_digits[] = "0123456789abcdefx"; /* "ghijklmnopqrstuvwxyz"; */
- static const char large_digits[] = "0123456789ABCDEFX"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
- int need_pfx = ((type & SPECIAL) && base != 10);
+ /* we are called with base 8, 10 or 16, only, thus don't need "G..." */
+ static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
+
+ char tmp[66];
+ char sign;
+ char locase;
+ int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10);
int i;
- digits = (type & LARGE) ? large_digits : small_digits;
- if (type & LEFT)
- type &= ~ZEROPAD;
- if (base < 2 || base > 36)
- return NULL;
+ /* locase = 0 or 0x20. ORing digits or letters with 'locase'
+ * produces same digits or (maybe lowercased) letters */
+ locase = (spec.flags & SMALL);
+ if (spec.flags & LEFT)
+ spec.flags &= ~ZEROPAD;
sign = 0;
- if (type & SIGN) {
+ if (spec.flags & SIGN) {
if ((signed long long) num < 0) {
sign = '-';
num = - (signed long long) num;
- size--;
- } else if (type & PLUS) {
+ spec.field_width--;
+ } else if (spec.flags & PLUS) {
sign = '+';
- size--;
- } else if (type & SPACE) {
+ spec.field_width--;
+ } else if (spec.flags & SPACE) {
sign = ' ';
- size--;
+ spec.field_width--;
}
}
if (need_pfx) {
- size--;
- if (base == 16)
- size--;
+ spec.field_width--;
+ if (spec.base == 16)
+ spec.field_width--;
}
/* generate full string in tmp[], in reverse order */
i = 0;
if (num == 0)
tmp[i++] = '0';
- else if (base != 10) { /* 8 or 16 */
- int mask = base - 1;
+ /* Generic code, for any base:
+ else do {
+ tmp[i++] = (digits[do_div(num,base)] | locase);
+ } while (num != 0);
+ */
+ else if (spec.base != 10) { /* 8 or 16 */
+ int mask = spec.base - 1;
int shift = 3;
- if (base == 16) shift = 4;
+ if (spec.base == 16) shift = 4;
do {
- tmp[i++] = digits[((unsigned char)num) & mask];
+ tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
num >>= shift;
} while (num);
- } else do { /* generic code, works for any base */
- tmp[i++] = digits[do_div(num,10 /*base*/)];
- } while (num);
+ } else { /* base 10 */
+ i = put_dec(tmp, num) - tmp;
+ }
/* printing 100 using %2d gives "100", not "00" */
- if (i > precision)
- precision = i;
+ if (i > spec.precision)
+ spec.precision = i;
/* leading space padding */
- size -= precision;
- if (!(type & (ZEROPAD+LEFT))) {
- while(--size >= 0) {
+ spec.field_width -= spec.precision;
+ if (!(spec.flags & (ZEROPAD+LEFT))) {
+ while(--spec.field_width >= 0) {
if (buf < end)
*buf = ' ';
++buf;
if (buf < end)
*buf = '0';
++buf;
- if (base == 16) {
+ if (spec.base == 16) {
if (buf < end)
- *buf = digits[16]; /* for arbitrary base: digits[33]; */
+ *buf = ('X' | locase);
++buf;
}
}
/* zero or space padding */
- if (!(type & LEFT)) {
- char c = (type & ZEROPAD) ? '0' : ' ';
- while (--size >= 0) {
+ if (!(spec.flags & LEFT)) {
+ char c = (spec.flags & ZEROPAD) ? '0' : ' ';
+ while (--spec.field_width >= 0) {
if (buf < end)
*buf = c;
++buf;
}
}
/* hmm even more zero padding? */
- while (i <= --precision) {
+ while (i <= --spec.precision) {
if (buf < end)
*buf = '0';
++buf;
++buf;
}
/* trailing space padding */
- while (--size >= 0) {
+ while (--spec.field_width >= 0) {
+ if (buf < end)
+ *buf = ' ';
+ ++buf;
+ }
+ return buf;
+}
+
+static char *string(char *buf, char *end, char *s, struct printf_spec spec)
+{
+ int len, i;
+
+ if ((unsigned long)s < PAGE_SIZE)
+ s = "<NULL>";
+
+ len = strnlen(s, spec.precision);
+
+ if (!(spec.flags & LEFT)) {
+ while (len < spec.field_width--) {
+ if (buf < end)
+ *buf = ' ';
+ ++buf;
+ }
+ }
+ for (i = 0; i < len; ++i) {
+ if (buf < end)
+ *buf = *s;
+ ++buf; ++s;
+ }
+ while (len < spec.field_width--) {
if (buf < end)
*buf = ' ';
++buf;
return buf;
}
+static char *symbol_string(char *buf, char *end, void *ptr,
+ struct printf_spec spec, char ext)
+{
+ unsigned long value = (unsigned long) ptr;
+#ifdef CONFIG_KALLSYMS
+ char sym[KSYM_SYMBOL_LEN];
+ if (ext != 'f')
+ sprint_symbol(sym, value);
+ else
+ kallsyms_lookup(value, NULL, NULL, NULL, sym);
+ return string(buf, end, sym, spec);
+#else
+ spec.field_width = 2*sizeof(void *);
+ spec.flags |= SPECIAL | SMALL | ZEROPAD;
+ spec.base = 16;
+ return number(buf, end, value, spec);
+#endif
+}
+
+static char *resource_string(char *buf, char *end, struct resource *res,
+ struct printf_spec spec)
+{
+#ifndef IO_RSRC_PRINTK_SIZE
+#define IO_RSRC_PRINTK_SIZE 4
+#endif
+
+#ifndef MEM_RSRC_PRINTK_SIZE
+#define MEM_RSRC_PRINTK_SIZE 8
+#endif
+ struct printf_spec num_spec = {
+ .base = 16,
+ .precision = -1,
+ .flags = SPECIAL | SMALL | ZEROPAD,
+ };
+ /* room for the actual numbers, the two "0x", -, [, ] and the final zero */
+ char sym[4*sizeof(resource_size_t) + 8];
+ char *p = sym, *pend = sym + sizeof(sym);
+ int size = -1;
+
+ if (res->flags & IORESOURCE_IO)
+ size = IO_RSRC_PRINTK_SIZE;
+ else if (res->flags & IORESOURCE_MEM)
+ size = MEM_RSRC_PRINTK_SIZE;
+
+ *p++ = '[';
+ num_spec.field_width = size;
+ p = number(p, pend, res->start, num_spec);
+ *p++ = '-';
+ p = number(p, pend, res->end, num_spec);
+ *p++ = ']';
+ *p = 0;
+
+ return string(buf, end, sym, spec);
+}
+
+static char *mac_address_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
+{
+ char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */
+ char *p = mac_addr;
+ int i;
+
+ for (i = 0; i < 6; i++) {
+ p = pack_hex_byte(p, addr[i]);
+ if (!(spec.flags & SPECIAL) && i != 5)
+ *p++ = ':';
+ }
+ *p = '\0';
+ spec.flags &= ~SPECIAL;
+
+ return string(buf, end, mac_addr, spec);
+}
+
+static char *ip6_addr_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
+{
+ char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */
+ char *p = ip6_addr;
+ int i;
+
+ for (i = 0; i < 8; i++) {
+ p = pack_hex_byte(p, addr[2 * i]);
+ p = pack_hex_byte(p, addr[2 * i + 1]);
+ if (!(spec.flags & SPECIAL) && i != 7)
+ *p++ = ':';
+ }
+ *p = '\0';
+ spec.flags &= ~SPECIAL;
+
+ return string(buf, end, ip6_addr, spec);
+}
+
+static char *ip4_addr_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
+{
+ char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */
+ char temp[3]; /* hold each IP quad in reverse order */
+ char *p = ip4_addr;
+ int i, digits;
+
+ for (i = 0; i < 4; i++) {
+ digits = put_dec_trunc(temp, addr[i]) - temp;
+ /* reverse the digits in the quad */
+ while (digits--)
+ *p++ = temp[digits];
+ if (i != 3)
+ *p++ = '.';
+ }
+ *p = '\0';
+ spec.flags &= ~SPECIAL;
+
+ return string(buf, end, ip4_addr, spec);
+}
+
+/*
+ * Show a '%p' thing. A kernel extension is that the '%p' is followed
+ * by an extra set of alphanumeric characters that are extended format
+ * specifiers.
+ *
+ * Right now we handle:
+ *
+ * - 'F' For symbolic function descriptor pointers with offset
+ * - 'f' For simple symbolic function names without offset
+ * - 'S' For symbolic direct pointers
+ * - 'R' For a struct resource pointer, it prints the range of
+ * addresses (not the name nor the flags)
+ * - 'M' For a 6-byte MAC address, it prints the address in the
+ * usual colon-separated hex notation
+ * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way (dot-separated
+ * decimal for v4 and colon separated network-order 16 bit hex for v6)
+ * - 'i' [46] for 'raw' IPv4/IPv6 addresses, IPv6 omits the colons, IPv4 is
+ * currently the same
+ *
+ * Note: The difference between 'S' and 'F' is that on ia64 and ppc64
+ * function pointers are really function descriptors, which contain a
+ * pointer to the real address.
+ */
+static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
+ struct printf_spec spec)
+{
+ if (!ptr)
+ return string(buf, end, "(null)", spec);
+
+ switch (*fmt) {
+ case 'F':
+ case 'f':
+ ptr = dereference_function_descriptor(ptr);
+ /* Fallthrough */
+ case 'S':
+ return symbol_string(buf, end, ptr, spec, *fmt);
+ case 'R':
+ return resource_string(buf, end, ptr, spec);
+ case 'm':
+ spec.flags |= SPECIAL;
+ /* Fallthrough */
+ case 'M':
+ return mac_address_string(buf, end, ptr, spec);
+ case 'i':
+ spec.flags |= SPECIAL;
+ /* Fallthrough */
+ case 'I':
+ if (fmt[1] == '6')
+ return ip6_addr_string(buf, end, ptr, spec);
+ if (fmt[1] == '4')
+ return ip4_addr_string(buf, end, ptr, spec);
+ spec.flags &= ~SPECIAL;
+ break;
+ }
+ spec.flags |= SMALL;
+ if (spec.field_width == -1) {
+ spec.field_width = 2*sizeof(void *);
+ spec.flags |= ZEROPAD;
+ }
+ spec.base = 16;
+
+ return number(buf, end, (unsigned long) ptr, spec);
+}
+
+/*
+ * Helper function to decode printf style format.
+ * Each call decode a token from the format and return the
+ * number of characters read (or likely the delta where it wants
+ * to go on the next call).
+ * The decoded token is returned through the parameters
+ *
+ * 'h', 'l', or 'L' for integer fields
+ * 'z' support added 23/7/1999 S.H.
+ * 'z' changed to 'Z' --davidm 1/25/99
+ * 't' added for ptrdiff_t
+ *
+ * @fmt: the format string
+ * @type of the token returned
+ * @flags: various flags such as +, -, # tokens..
+ * @field_width: overwritten width
+ * @base: base of the number (octal, hex, ...)
+ * @precision: precision of a number
+ * @qualifier: qualifier of a number (long, size_t, ...)
+ */
+static int format_decode(const char *fmt, struct printf_spec *spec)
+{
+ const char *start = fmt;
+
+ /* we finished early by reading the field width */
+ if (spec->type == FORMAT_TYPE_WIDTH) {
+ if (spec->field_width < 0) {
+ spec->field_width = -spec->field_width;
+ spec->flags |= LEFT;
+ }
+ spec->type = FORMAT_TYPE_NONE;
+ goto precision;
+ }
+
+ /* we finished early by reading the precision */
+ if (spec->type == FORMAT_TYPE_PRECISION) {
+ if (spec->precision < 0)
+ spec->precision = 0;
+
+ spec->type = FORMAT_TYPE_NONE;
+ goto qualifier;
+ }
+
+ /* By default */
+ spec->type = FORMAT_TYPE_NONE;
+
+ for (; *fmt ; ++fmt) {
+ if (*fmt == '%')
+ break;
+ }
+
+ /* Return the current non-format string */
+ if (fmt != start || !*fmt)
+ return fmt - start;
+
+ /* Process flags */
+ spec->flags = 0;
+
+ while (1) { /* this also skips first '%' */
+ bool found = true;
+
+ ++fmt;
+
+ switch (*fmt) {
+ case '-': spec->flags |= LEFT; break;
+ case '+': spec->flags |= PLUS; break;
+ case ' ': spec->flags |= SPACE; break;
+ case '#': spec->flags |= SPECIAL; break;
+ case '0': spec->flags |= ZEROPAD; break;
+ default: found = false;
+ }
+
+ if (!found)
+ break;
+ }
+
+ /* get field width */
+ spec->field_width = -1;
+
+ if (isdigit(*fmt))
+ spec->field_width = skip_atoi(&fmt);
+ else if (*fmt == '*') {
+ /* it's the next argument */
+ spec->type = FORMAT_TYPE_WIDTH;
+ return ++fmt - start;
+ }
+
+precision:
+ /* get the precision */
+ spec->precision = -1;
+ if (*fmt == '.') {
+ ++fmt;
+ if (isdigit(*fmt)) {
+ spec->precision = skip_atoi(&fmt);
+ if (spec->precision < 0)
+ spec->precision = 0;
+ } else if (*fmt == '*') {
+ /* it's the next argument */
+ spec->type = FORMAT_TYPE_PRECISION;
+ return ++fmt - start;
+ }
+ }
+
+qualifier:
+ /* get the conversion qualifier */
+ spec->qualifier = -1;
+ if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
+ *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
+ spec->qualifier = *fmt++;
+ if (unlikely(spec->qualifier == *fmt)) {
+ if (spec->qualifier == 'l') {
+ spec->qualifier = 'L';
+ ++fmt;
+ } else if (spec->qualifier == 'h') {
+ spec->qualifier = 'H';
+ ++fmt;
+ }
+ }
+ }
+
+ /* default base */
+ spec->base = 10;
+ switch (*fmt) {
+ case 'c':
+ spec->type = FORMAT_TYPE_CHAR;
+ return ++fmt - start;
+
+ case 's':
+ spec->type = FORMAT_TYPE_STR;
+ return ++fmt - start;
+
+ case 'p':
+ spec->type = FORMAT_TYPE_PTR;
+ return fmt - start;
+ /* skip alnum */
+
+ case 'n':
+ spec->type = FORMAT_TYPE_NRCHARS;
+ return ++fmt - start;
+
+ case '%':
+ spec->type = FORMAT_TYPE_PERCENT_CHAR;
+ return ++fmt - start;
+
+ /* integer number formats - set up the flags and "break" */
+ case 'o':
+ spec->base = 8;
+ break;
+
+ case 'x':
+ spec->flags |= SMALL;
+
+ case 'X':
+ spec->base = 16;
+ break;
+
+ case 'd':
+ case 'i':
+ spec->flags |= SIGN;
+ case 'u':
+ break;
+
+ default:
+ spec->type = FORMAT_TYPE_INVALID;
+ return fmt - start;
+ }
+
+ if (spec->qualifier == 'L')
+ spec->type = FORMAT_TYPE_LONG_LONG;
+ else if (spec->qualifier == 'l') {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_LONG;
+ else
+ spec->type = FORMAT_TYPE_ULONG;
+ } else if (spec->qualifier == 'Z' || spec->qualifier == 'z') {
+ spec->type = FORMAT_TYPE_SIZE_T;
+ } else if (spec->qualifier == 't') {
+ spec->type = FORMAT_TYPE_PTRDIFF;
+ } else if (spec->qualifier == 'H') {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_BYTE;
+ else
+ spec->type = FORMAT_TYPE_UBYTE;
+ } else if (spec->qualifier == 'h') {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_SHORT;
+ else
+ spec->type = FORMAT_TYPE_USHORT;
+ } else {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_INT;
+ else
+ spec->type = FORMAT_TYPE_UINT;
+ }
+
+ return ++fmt - start;
+}
+
/**
* vsnprintf - Format a string and place it in a buffer
* @buf: The buffer to place the result into
* @fmt: The format string to use
* @args: Arguments for the format string
*
+ * This function follows C99 vsnprintf, but has some extensions:
+ * %pS output the name of a text symbol
+ * %pF output the name of a function pointer with its offset
+ * %pf output the name of a function pointer without its offset
+ * %pR output the address range in a struct resource
+ *
* The return value is the number of characters which would
* be generated for the given input, excluding the trailing
* '\0', as per ISO C99. If you want to have the exact
*/
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
- int len;
unsigned long long num;
- int i, base;
char *str, *end, c;
- const char *s;
-
- int flags; /* flags to number() */
-
- int field_width; /* width of output field */
- int precision; /* min. # of digits for integers; max
- number of chars for from string */
- int qualifier; /* 'h', 'l', or 'L' for integer fields */
- /* 'z' support added 23/7/1999 S.H. */
- /* 'z' changed to 'Z' --davidm 1/25/99 */
- /* 't' added for ptrdiff_t */
+ int read;
+ struct printf_spec spec = {0};
/* Reject out-of-range values early. Large positive sizes are
used for unknown buffer sizes. */
size = end - buf;
}
- for (; *fmt ; ++fmt) {
- if (*fmt != '%') {
- if (str < end)
- *str = *fmt;
- ++str;
- continue;
- }
+ while (*fmt) {
+ const char *old_fmt = fmt;
- /* process flags */
- flags = 0;
- repeat:
- ++fmt; /* this also skips first '%' */
- switch (*fmt) {
- case '-': flags |= LEFT; goto repeat;
- case '+': flags |= PLUS; goto repeat;
- case ' ': flags |= SPACE; goto repeat;
- case '#': flags |= SPECIAL; goto repeat;
- case '0': flags |= ZEROPAD; goto repeat;
- }
+ read = format_decode(fmt, &spec);
- /* get field width */
- field_width = -1;
- if (isdigit(*fmt))
- field_width = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- field_width = va_arg(args, int);
- if (field_width < 0) {
- field_width = -field_width;
- flags |= LEFT;
- }
- }
+ fmt += read;
- /* get the precision */
- precision = -1;
- if (*fmt == '.') {
- ++fmt;
- if (isdigit(*fmt))
- precision = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- precision = va_arg(args, int);
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE: {
+ int copy = read;
+ if (str < end) {
+ if (copy > end - str)
+ copy = end - str;
+ memcpy(str, old_fmt, copy);
}
- if (precision < 0)
- precision = 0;
+ str += read;
+ break;
}
- /* get the conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
- qualifier = *fmt;
- ++fmt;
- if (qualifier == 'l' && *fmt == 'l') {
- qualifier = 'L';
- ++fmt;
- }
- }
+ case FORMAT_TYPE_WIDTH:
+ spec.field_width = va_arg(args, int);
+ break;
- /* default base */
- base = 10;
+ case FORMAT_TYPE_PRECISION:
+ spec.precision = va_arg(args, int);
+ break;
- switch (*fmt) {
- case 'c':
- if (!(flags & LEFT)) {
- while (--field_width > 0) {
- if (str < end)
- *str = ' ';
- ++str;
- }
- }
- c = (unsigned char) va_arg(args, int);
- if (str < end)
- *str = c;
- ++str;
- while (--field_width > 0) {
+ case FORMAT_TYPE_CHAR:
+ if (!(spec.flags & LEFT)) {
+ while (--spec.field_width > 0) {
if (str < end)
*str = ' ';
++str;
+
}
- continue;
+ }
+ c = (unsigned char) va_arg(args, int);
+ if (str < end)
+ *str = c;
+ ++str;
+ while (--spec.field_width > 0) {
+ if (str < end)
+ *str = ' ';
+ ++str;
+ }
+ break;
- case 's':
- s = va_arg(args, char *);
- if ((unsigned long)s < PAGE_SIZE)
- s = "<NULL>";
+ case FORMAT_TYPE_STR:
+ str = string(str, end, va_arg(args, char *), spec);
+ break;
- len = strnlen(s, precision);
+ case FORMAT_TYPE_PTR:
+ str = pointer(fmt+1, str, end, va_arg(args, void *),
+ spec);
+ while (isalnum(*fmt))
+ fmt++;
+ break;
- if (!(flags & LEFT)) {
- while (len < field_width--) {
- if (str < end)
- *str = ' ';
- ++str;
- }
- }
- for (i = 0; i < len; ++i) {
- if (str < end)
- *str = *s;
- ++str; ++s;
- }
- while (len < field_width--) {
- if (str < end)
- *str = ' ';
- ++str;
- }
- continue;
+ case FORMAT_TYPE_PERCENT_CHAR:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
- case 'p':
- if (field_width == -1) {
- field_width = 2*sizeof(void *);
- flags |= ZEROPAD;
- }
- str = number(str, end,
- (unsigned long) va_arg(args, void *),
- 16, field_width, precision, flags);
- continue;
-
-
- case 'n':
- /* FIXME:
- * What does C99 say about the overflow case here? */
- if (qualifier == 'l') {
- long * ip = va_arg(args, long *);
- *ip = (str - buf);
- } else if (qualifier == 'Z' || qualifier == 'z') {
- size_t * ip = va_arg(args, size_t *);
- *ip = (str - buf);
- } else {
- int * ip = va_arg(args, int *);
- *ip = (str - buf);
- }
- continue;
+ case FORMAT_TYPE_INVALID:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
- case '%':
- if (str < end)
- *str = '%';
- ++str;
- continue;
+ case FORMAT_TYPE_NRCHARS: {
+ int qualifier = spec.qualifier;
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
+ if (qualifier == 'l') {
+ long *ip = va_arg(args, long *);
+ *ip = (str - buf);
+ } else if (qualifier == 'Z' ||
+ qualifier == 'z') {
+ size_t *ip = va_arg(args, size_t *);
+ *ip = (str - buf);
+ } else {
+ int *ip = va_arg(args, int *);
+ *ip = (str - buf);
+ }
+ break;
+ }
- case 'X':
- flags |= LARGE;
- case 'x':
- base = 16;
+ default:
+ switch (spec.type) {
+ case FORMAT_TYPE_LONG_LONG:
+ num = va_arg(args, long long);
break;
-
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
+ case FORMAT_TYPE_ULONG:
+ num = va_arg(args, unsigned long);
+ break;
+ case FORMAT_TYPE_LONG:
+ num = va_arg(args, long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ num = va_arg(args, size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ num = va_arg(args, ptrdiff_t);
+ break;
+ case FORMAT_TYPE_UBYTE:
+ num = (unsigned char) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_BYTE:
+ num = (signed char) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_USHORT:
+ num = (unsigned short) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_SHORT:
+ num = (short) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_INT:
+ num = (int) va_arg(args, int);
break;
-
default:
- if (str < end)
- *str = '%';
- ++str;
- if (*fmt) {
- if (str < end)
- *str = *fmt;
- ++str;
- } else {
- --fmt;
- }
- continue;
- }
- if (qualifier == 'L')
- num = va_arg(args, long long);
- else if (qualifier == 'l') {
- num = va_arg(args, unsigned long);
- if (flags & SIGN)
- num = (signed long) num;
- } else if (qualifier == 'Z' || qualifier == 'z') {
- num = va_arg(args, size_t);
- } else if (qualifier == 't') {
- num = va_arg(args, ptrdiff_t);
- } else if (qualifier == 'h') {
- num = (unsigned short) va_arg(args, int);
- if (flags & SIGN)
- num = (signed short) num;
- } else {
- num = va_arg(args, unsigned int);
- if (flags & SIGN)
- num = (signed int) num;
+ num = va_arg(args, unsigned int);
+ }
+
+ str = number(str, end, num, spec);
}
- str = number(str, end, num, base,
- field_width, precision, flags);
}
+
if (size > 0) {
if (str < end)
*str = '\0';
else
end[-1] = '\0';
}
+
/* the trailing null byte doesn't count towards the total */
return str-buf;
-}
+}
EXPORT_SYMBOL(vsnprintf);
/**
*
* Call this function if you are already dealing with a va_list.
* You probably want scnprintf() instead.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
i=vsnprintf(buf,size,fmt,args);
return (i >= size) ? (size - 1) : i;
}
-
EXPORT_SYMBOL(vscnprintf);
/**
* generated for the given input, excluding the trailing null,
* as per ISO C99. If the return is greater than or equal to
* @size, the resulting string is truncated.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int snprintf(char * buf, size_t size, const char *fmt, ...)
{
va_end(args);
return i;
}
-
EXPORT_SYMBOL(snprintf);
/**
*
* Call this function if you are already dealing with a va_list.
* You probably want sprintf() instead.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int vsprintf(char *buf, const char *fmt, va_list args)
{
return vsnprintf(buf, INT_MAX, fmt, args);
}
-
EXPORT_SYMBOL(vsprintf);
/**
* The function returns the number of characters written
* into @buf. Use snprintf() or scnprintf() in order to avoid
* buffer overflows.
+ *
+ * See the vsnprintf() documentation for format string extensions over C99.
*/
int sprintf(char * buf, const char *fmt, ...)
{
va_end(args);
return i;
}
-
EXPORT_SYMBOL(sprintf);
+#ifdef CONFIG_BINARY_PRINTF
+/*
+ * bprintf service:
+ * vbin_printf() - VA arguments to binary data
+ * bstr_printf() - Binary data to text string
+ */
+
+/**
+ * vbin_printf - Parse a format string and place args' binary value in a buffer
+ * @bin_buf: The buffer to place args' binary value
+ * @size: The size of the buffer(by words(32bits), not characters)
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The format follows C99 vsnprintf, except %n is ignored, and its argument
+ * is skiped.
+ *
+ * The return value is the number of words(32bits) which would be generated for
+ * the given input.
+ *
+ * NOTE:
+ * If the return value is greater than @size, the resulting bin_buf is NOT
+ * valid for bstr_printf().
+ */
+int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args)
+{
+ struct printf_spec spec = {0};
+ char *str, *end;
+ int read;
+
+ str = (char *)bin_buf;
+ end = (char *)(bin_buf + size);
+
+#define save_arg(type) \
+do { \
+ if (sizeof(type) == 8) { \
+ unsigned long long value; \
+ str = PTR_ALIGN(str, sizeof(u32)); \
+ value = va_arg(args, unsigned long long); \
+ if (str + sizeof(type) <= end) { \
+ *(u32 *)str = *(u32 *)&value; \
+ *(u32 *)(str + 4) = *((u32 *)&value + 1); \
+ } \
+ } else { \
+ unsigned long value; \
+ str = PTR_ALIGN(str, sizeof(type)); \
+ value = va_arg(args, int); \
+ if (str + sizeof(type) <= end) \
+ *(typeof(type) *)str = (type)value; \
+ } \
+ str += sizeof(type); \
+} while (0)
+
+
+ while (*fmt) {
+ read = format_decode(fmt, &spec);
+
+ fmt += read;
+
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE:
+ break;
+
+ case FORMAT_TYPE_WIDTH:
+ case FORMAT_TYPE_PRECISION:
+ save_arg(int);
+ break;
+
+ case FORMAT_TYPE_CHAR:
+ save_arg(char);
+ break;
+
+ case FORMAT_TYPE_STR: {
+ const char *save_str = va_arg(args, char *);
+ size_t len;
+ if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
+ || (unsigned long)save_str < PAGE_SIZE)
+ save_str = "<NULL>";
+ len = strlen(save_str);
+ if (str + len + 1 < end)
+ memcpy(str, save_str, len + 1);
+ str += len + 1;
+ break;
+ }
+
+ case FORMAT_TYPE_PTR:
+ save_arg(void *);
+ /* skip all alphanumeric pointer suffixes */
+ while (isalnum(*fmt))
+ fmt++;
+ break;
+
+ case FORMAT_TYPE_PERCENT_CHAR:
+ break;
+
+ case FORMAT_TYPE_INVALID:
+ break;
+
+ case FORMAT_TYPE_NRCHARS: {
+ /* skip %n 's argument */
+ int qualifier = spec.qualifier;
+ void *skip_arg;
+ if (qualifier == 'l')
+ skip_arg = va_arg(args, long *);
+ else if (qualifier == 'Z' || qualifier == 'z')
+ skip_arg = va_arg(args, size_t *);
+ else
+ skip_arg = va_arg(args, int *);
+ break;
+ }
+
+ default:
+ switch (spec.type) {
+
+ case FORMAT_TYPE_LONG_LONG:
+ save_arg(long long);
+ break;
+ case FORMAT_TYPE_ULONG:
+ case FORMAT_TYPE_LONG:
+ save_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ save_arg(size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ save_arg(ptrdiff_t);
+ break;
+ case FORMAT_TYPE_UBYTE:
+ case FORMAT_TYPE_BYTE:
+ save_arg(char);
+ break;
+ case FORMAT_TYPE_USHORT:
+ case FORMAT_TYPE_SHORT:
+ save_arg(short);
+ break;
+ default:
+ save_arg(int);
+ }
+ }
+ }
+ return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
+
+#undef save_arg
+}
+EXPORT_SYMBOL_GPL(vbin_printf);
+
+/**
+ * bstr_printf - Format a string from binary arguments and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @bin_buf: Binary arguments for the format string
+ *
+ * This function like C99 vsnprintf, but the difference is that vsnprintf gets
+ * arguments from stack, and bstr_printf gets arguments from @bin_buf which is
+ * a binary buffer that generated by vbin_printf.
+ *
+ * The format follows C99 vsnprintf, but has some extensions:
+ * %pS output the name of a text symbol
+ * %pF output the name of a function pointer with its offset
+ * %pf output the name of a function pointer without its offset
+ * %pR output the address range in a struct resource
+ * %n is ignored
+ *
+ * The return value is the number of characters which would
+ * be generated for the given input, excluding the trailing
+ * '\0', as per ISO C99. If you want to have the exact
+ * number of characters written into @buf as return value
+ * (not including the trailing '\0'), use vscnprintf(). If the
+ * return is greater than or equal to @size, the resulting
+ * string is truncated.
+ */
+int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
+{
+ unsigned long long num;
+ char *str, *end, c;
+ const char *args = (const char *)bin_buf;
+
+ struct printf_spec spec = {0};
+
+ if (unlikely((int) size < 0)) {
+ /* There can be only one.. */
+ static char warn = 1;
+ WARN_ON(warn);
+ warn = 0;
+ return 0;
+ }
+
+ str = buf;
+ end = buf + size;
+
+#define get_arg(type) \
+({ \
+ typeof(type) value; \
+ if (sizeof(type) == 8) { \
+ args = PTR_ALIGN(args, sizeof(u32)); \
+ *(u32 *)&value = *(u32 *)args; \
+ *((u32 *)&value + 1) = *(u32 *)(args + 4); \
+ } else { \
+ args = PTR_ALIGN(args, sizeof(type)); \
+ value = *(typeof(type) *)args; \
+ } \
+ args += sizeof(type); \
+ value; \
+})
+
+ /* Make sure end is always >= buf */
+ if (end < buf) {
+ end = ((void *)-1);
+ size = end - buf;
+ }
+
+ while (*fmt) {
+ int read;
+ const char *old_fmt = fmt;
+
+ read = format_decode(fmt, &spec);
+
+ fmt += read;
+
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE: {
+ int copy = read;
+ if (str < end) {
+ if (copy > end - str)
+ copy = end - str;
+ memcpy(str, old_fmt, copy);
+ }
+ str += read;
+ break;
+ }
+
+ case FORMAT_TYPE_WIDTH:
+ spec.field_width = get_arg(int);
+ break;
+
+ case FORMAT_TYPE_PRECISION:
+ spec.precision = get_arg(int);
+ break;
+
+ case FORMAT_TYPE_CHAR:
+ if (!(spec.flags & LEFT)) {
+ while (--spec.field_width > 0) {
+ if (str < end)
+ *str = ' ';
+ ++str;
+ }
+ }
+ c = (unsigned char) get_arg(char);
+ if (str < end)
+ *str = c;
+ ++str;
+ while (--spec.field_width > 0) {
+ if (str < end)
+ *str = ' ';
+ ++str;
+ }
+ break;
+
+ case FORMAT_TYPE_STR: {
+ const char *str_arg = args;
+ size_t len = strlen(str_arg);
+ args += len + 1;
+ str = string(str, end, (char *)str_arg, spec);
+ break;
+ }
+
+ case FORMAT_TYPE_PTR:
+ str = pointer(fmt+1, str, end, get_arg(void *), spec);
+ while (isalnum(*fmt))
+ fmt++;
+ break;
+
+ case FORMAT_TYPE_PERCENT_CHAR:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
+
+ case FORMAT_TYPE_INVALID:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
+
+ case FORMAT_TYPE_NRCHARS:
+ /* skip */
+ break;
+
+ default:
+ switch (spec.type) {
+
+ case FORMAT_TYPE_LONG_LONG:
+ num = get_arg(long long);
+ break;
+ case FORMAT_TYPE_ULONG:
+ num = get_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_LONG:
+ num = get_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ num = get_arg(size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ num = get_arg(ptrdiff_t);
+ break;
+ case FORMAT_TYPE_UBYTE:
+ num = get_arg(unsigned char);
+ break;
+ case FORMAT_TYPE_BYTE:
+ num = get_arg(signed char);
+ break;
+ case FORMAT_TYPE_USHORT:
+ num = get_arg(unsigned short);
+ break;
+ case FORMAT_TYPE_SHORT:
+ num = get_arg(short);
+ break;
+ case FORMAT_TYPE_UINT:
+ num = get_arg(unsigned int);
+ break;
+ default:
+ num = get_arg(int);
+ }
+
+ str = number(str, end, num, spec);
+ }
+ }
+
+ if (size > 0) {
+ if (str < end)
+ *str = '\0';
+ else
+ end[-1] = '\0';
+ }
+
+#undef get_arg
+
+ /* the trailing null byte doesn't count towards the total */
+ return str - buf;
+}
+EXPORT_SYMBOL_GPL(bstr_printf);
+
+/**
+ * bprintf - Parse a format string and place args' binary value in a buffer
+ * @bin_buf: The buffer to place args' binary value
+ * @size: The size of the buffer(by words(32bits), not characters)
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The function returns the number of words(u32) written
+ * into @bin_buf.
+ */
+int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...)
+{
+ va_list args;
+ int ret;
+
+ va_start(args, fmt);
+ ret = vbin_printf(bin_buf, size, fmt, args);
+ va_end(args);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(bprintf);
+
+#endif /* CONFIG_BINARY_PRINTF */
+
/**
* vsscanf - Unformat a buffer into a list of arguments
* @buf: input buffer
return num;
}
-
EXPORT_SYMBOL(vsscanf);
/**
va_end(args);
return i;
}
-
EXPORT_SYMBOL(sscanf);
-
-
-/* Simplified asprintf. */
-char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
-{
- unsigned int len;
- char *p;
- va_list aq;
-
- va_copy(aq, ap);
- len = vsnprintf(NULL, 0, fmt, aq);
- va_end(aq);
-
- p = kmalloc(len+1, gfp);
- if (!p)
- return NULL;
-
- vsnprintf(p, len+1, fmt, ap);
-
- return p;
-}
-EXPORT_SYMBOL(kvasprintf);
-
-char *kasprintf(gfp_t gfp, const char *fmt, ...)
-{
- va_list ap;
- char *p;
-
- va_start(ap, fmt);
- p = kvasprintf(gfp, fmt, ap);
- va_end(ap);
-
- return p;
-}
-EXPORT_SYMBOL(kasprintf);
Code Review / linux-2.6.git / blobdiff