/*
|
/*
|
* linux/lib/vsprintf.c
|
* linux/lib/vsprintf.c
|
*
|
*
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
* Copyright (C) 1991, 1992 Linus Torvalds
|
*/
|
*/
|
|
|
/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
|
/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
|
/*
|
/*
|
* Wirzenius wrote this portably, Torvalds fucked it up :-)
|
* Wirzenius wrote this portably, Torvalds fucked it up :-)
|
*/
|
*/
|
|
|
/*
|
/*
|
* Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
|
* Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com>
|
* - changed to provide snprintf and vsnprintf functions
|
* - changed to provide snprintf and vsnprintf functions
|
*/
|
*/
|
|
|
#include <stdarg.h>
|
#include <stdarg.h>
|
#include <linux/types.h>
|
#include <linux/types.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/ctype.h>
|
#include <linux/ctype.h>
|
#include <linux/kernel.h>
|
#include <linux/kernel.h>
|
|
|
#include <asm/div64.h>
|
#include <asm/div64.h>
|
#include <asm/page.h>
|
#include <asm/page.h>
|
|
|
/**
|
/**
|
* simple_strtoul - convert a string to an unsigned long
|
* simple_strtoul - convert a string to an unsigned long
|
* @cp: The start of the string
|
* @cp: The start of the string
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @base: The number base to use
|
* @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,value;
|
|
|
if (!base) {
|
if (!base) {
|
base = 10;
|
base = 10;
|
if (*cp == '0') {
|
if (*cp == '0') {
|
base = 8;
|
base = 8;
|
cp++;
|
cp++;
|
if ((*cp == 'x') && isxdigit(cp[1])) {
|
if ((*cp == 'x') && isxdigit(cp[1])) {
|
cp++;
|
cp++;
|
base = 16;
|
base = 16;
|
}
|
}
|
}
|
}
|
}
|
}
|
while (isxdigit(*cp) &&
|
while (isxdigit(*cp) &&
|
(value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
|
(value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
|
result = result*base + value;
|
result = result*base + value;
|
cp++;
|
cp++;
|
}
|
}
|
if (endp)
|
if (endp)
|
*endp = (char *)cp;
|
*endp = (char *)cp;
|
return result;
|
return result;
|
}
|
}
|
|
|
/**
|
/**
|
* simple_strtol - convert a string to a signed long
|
* simple_strtol - convert a string to a signed long
|
* @cp: The start of the string
|
* @cp: The start of the string
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @base: The number base to use
|
* @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=='-')
|
if(*cp=='-')
|
return -simple_strtoul(cp+1,endp,base);
|
return -simple_strtoul(cp+1,endp,base);
|
return simple_strtoul(cp,endp,base);
|
return simple_strtoul(cp,endp,base);
|
}
|
}
|
|
|
/**
|
/**
|
* simple_strtoull - convert a string to an unsigned long long
|
* simple_strtoull - convert a string to an unsigned long long
|
* @cp: The start of the string
|
* @cp: The start of the string
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @base: The number base to use
|
* @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,value;
|
|
|
if (!base) {
|
if (!base) {
|
base = 10;
|
base = 10;
|
if (*cp == '0') {
|
if (*cp == '0') {
|
base = 8;
|
base = 8;
|
cp++;
|
cp++;
|
if ((*cp == 'x') && isxdigit(cp[1])) {
|
if ((*cp == 'x') && isxdigit(cp[1])) {
|
cp++;
|
cp++;
|
base = 16;
|
base = 16;
|
}
|
}
|
}
|
}
|
}
|
}
|
while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
|
while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
|
? toupper(*cp) : *cp)-'A'+10) < base) {
|
? toupper(*cp) : *cp)-'A'+10) < base) {
|
result = result*base + value;
|
result = result*base + value;
|
cp++;
|
cp++;
|
}
|
}
|
if (endp)
|
if (endp)
|
*endp = (char *)cp;
|
*endp = (char *)cp;
|
return result;
|
return result;
|
}
|
}
|
|
|
/**
|
/**
|
* simple_strtoll - convert a string to a signed long long
|
* simple_strtoll - convert a string to a signed long long
|
* @cp: The start of the string
|
* @cp: The start of the string
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @endp: A pointer to the end of the parsed string will be placed here
|
* @base: The number base to use
|
* @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=='-')
|
if(*cp=='-')
|
return -simple_strtoull(cp+1,endp,base);
|
return -simple_strtoull(cp+1,endp,base);
|
return simple_strtoull(cp,endp,base);
|
return simple_strtoull(cp,endp,base);
|
}
|
}
|
|
|
static int skip_atoi(const char **s)
|
static int skip_atoi(const char **s)
|
{
|
{
|
int i=0;
|
int i=0;
|
|
|
while (isdigit(**s))
|
while (isdigit(**s))
|
i = i*10 + *((*s)++) - '0';
|
i = i*10 + *((*s)++) - '0';
|
return i;
|
return i;
|
}
|
}
|
|
|
#define ZEROPAD 1 /* pad with zero */
|
#define ZEROPAD 1 /* pad with zero */
|
#define SIGN 2 /* unsigned/signed long */
|
#define SIGN 2 /* unsigned/signed long */
|
#define PLUS 4 /* show plus */
|
#define PLUS 4 /* show plus */
|
#define SPACE 8 /* space if plus */
|
#define SPACE 8 /* space if plus */
|
#define LEFT 16 /* left justified */
|
#define LEFT 16 /* left justified */
|
#define SPECIAL 32 /* 0x */
|
#define SPECIAL 32 /* 0x */
|
#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
|
#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
|
|
|
static char * number(char * buf, char * end, long long num, int base, int size, int precision, int type)
|
static char * number(char * buf, char * end, long long num, int base, int size, int precision, int type)
|
{
|
{
|
char c,sign,tmp[66];
|
char c,sign,tmp[66];
|
const char *digits;
|
const char *digits;
|
static const char small_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
|
static const char small_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
|
static const char large_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
static const char large_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
int i;
|
int i;
|
|
|
digits = (type & LARGE) ? large_digits : small_digits;
|
digits = (type & LARGE) ? large_digits : small_digits;
|
if (type & LEFT)
|
if (type & LEFT)
|
type &= ~ZEROPAD;
|
type &= ~ZEROPAD;
|
if (base < 2 || base > 36)
|
if (base < 2 || base > 36)
|
return 0;
|
return 0;
|
c = (type & ZEROPAD) ? '0' : ' ';
|
c = (type & ZEROPAD) ? '0' : ' ';
|
sign = 0;
|
sign = 0;
|
if (type & SIGN) {
|
if (type & SIGN) {
|
if (num < 0) {
|
if (num < 0) {
|
sign = '-';
|
sign = '-';
|
num = -num;
|
num = -num;
|
size--;
|
size--;
|
} else if (type & PLUS) {
|
} else if (type & PLUS) {
|
sign = '+';
|
sign = '+';
|
size--;
|
size--;
|
} else if (type & SPACE) {
|
} else if (type & SPACE) {
|
sign = ' ';
|
sign = ' ';
|
size--;
|
size--;
|
}
|
}
|
}
|
}
|
if (type & SPECIAL) {
|
if (type & SPECIAL) {
|
if (base == 16)
|
if (base == 16)
|
size -= 2;
|
size -= 2;
|
else if (base == 8)
|
else if (base == 8)
|
size--;
|
size--;
|
}
|
}
|
i = 0;
|
i = 0;
|
if (num == 0)
|
if (num == 0)
|
tmp[i++]='0';
|
tmp[i++]='0';
|
else while (num != 0)
|
else while (num != 0)
|
tmp[i++] = digits[do_div(num,base)];
|
tmp[i++] = digits[do_div(num,base)];
|
if (i > precision)
|
if (i > precision)
|
precision = i;
|
precision = i;
|
size -= precision;
|
size -= precision;
|
if (!(type&(ZEROPAD+LEFT))) {
|
if (!(type&(ZEROPAD+LEFT))) {
|
while(size-->0) {
|
while(size-->0) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = ' ';
|
*buf = ' ';
|
++buf;
|
++buf;
|
}
|
}
|
}
|
}
|
if (sign) {
|
if (sign) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = sign;
|
*buf = sign;
|
++buf;
|
++buf;
|
}
|
}
|
if (type & SPECIAL) {
|
if (type & SPECIAL) {
|
if (base==8) {
|
if (base==8) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = '0';
|
*buf = '0';
|
++buf;
|
++buf;
|
} else if (base==16) {
|
} else if (base==16) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = '0';
|
*buf = '0';
|
++buf;
|
++buf;
|
if (buf <= end)
|
if (buf <= end)
|
*buf = digits[33];
|
*buf = digits[33];
|
++buf;
|
++buf;
|
}
|
}
|
}
|
}
|
if (!(type & LEFT)) {
|
if (!(type & LEFT)) {
|
while (size-- > 0) {
|
while (size-- > 0) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = c;
|
*buf = c;
|
++buf;
|
++buf;
|
}
|
}
|
}
|
}
|
while (i < precision--) {
|
while (i < precision--) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = '0';
|
*buf = '0';
|
++buf;
|
++buf;
|
}
|
}
|
while (i-- > 0) {
|
while (i-- > 0) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = tmp[i];
|
*buf = tmp[i];
|
++buf;
|
++buf;
|
}
|
}
|
while (size-- > 0) {
|
while (size-- > 0) {
|
if (buf <= end)
|
if (buf <= end)
|
*buf = ' ';
|
*buf = ' ';
|
++buf;
|
++buf;
|
}
|
}
|
return buf;
|
return buf;
|
}
|
}
|
|
|
/**
|
/**
|
* vsnprintf - Format a string and place it in a buffer
|
* vsnprintf - Format a string and place it in a buffer
|
* @buf: The buffer to place the result into
|
* @buf: The buffer to place the result into
|
* @size: The size of the buffer, including the trailing null space
|
* @size: The size of the buffer, including the trailing null space
|
* @fmt: The format string to use
|
* @fmt: The format string to use
|
* @args: Arguments for the format string
|
* @args: Arguments for the format string
|
*
|
*
|
* Call this function if you are already dealing with a va_list.
|
* Call this function if you are already dealing with a va_list.
|
* You probably want snprintf instead.
|
* You probably want snprintf instead.
|
*/
|
*/
|
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
|
{
|
{
|
int len;
|
int len;
|
unsigned long long num;
|
unsigned long long num;
|
int i, base;
|
int i, base;
|
char *str, *end, c;
|
char *str, *end, c;
|
const char *s;
|
const char *s;
|
|
|
int flags; /* flags to number() */
|
int flags; /* flags to number() */
|
|
|
int field_width; /* width of output field */
|
int field_width; /* width of output field */
|
int precision; /* min. # of digits for integers; max
|
int precision; /* min. # of digits for integers; max
|
number of chars for from string */
|
number of chars for from string */
|
int qualifier; /* 'h', 'l', or 'L' for integer fields */
|
int qualifier; /* 'h', 'l', or 'L' for integer fields */
|
/* 'z' support added 23/7/1999 S.H. */
|
/* 'z' support added 23/7/1999 S.H. */
|
/* 'z' changed to 'Z' --davidm 1/25/99 */
|
/* 'z' changed to 'Z' --davidm 1/25/99 */
|
|
|
/* Reject out-of-range values early */
|
/* Reject out-of-range values early */
|
if (unlikely((int) size < 0)) {
|
if (unlikely((int) size < 0)) {
|
/* There can be only one.. */
|
/* There can be only one.. */
|
static int warn = 1;
|
static int warn = 1;
|
if (warn) {
|
if (warn) {
|
printk(KERN_WARNING "improper call of vsnprintf!\n");
|
printk(KERN_WARNING "improper call of vsnprintf!\n");
|
dump_stack();
|
dump_stack();
|
warn = 0;
|
warn = 0;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
str = buf;
|
str = buf;
|
end = buf + size - 1;
|
end = buf + size - 1;
|
|
|
if (end < buf - 1) {
|
if (end < buf - 1) {
|
end = ((void *) -1);
|
end = ((void *) -1);
|
size = end - buf + 1;
|
size = end - buf + 1;
|
}
|
}
|
|
|
for (; *fmt ; ++fmt) {
|
for (; *fmt ; ++fmt) {
|
if (*fmt != '%') {
|
if (*fmt != '%') {
|
if (str <= end)
|
if (str <= end)
|
*str = *fmt;
|
*str = *fmt;
|
++str;
|
++str;
|
continue;
|
continue;
|
}
|
}
|
|
|
/* process flags */
|
/* process flags */
|
flags = 0;
|
flags = 0;
|
repeat:
|
repeat:
|
++fmt; /* this also skips first '%' */
|
++fmt; /* this also skips first '%' */
|
switch (*fmt) {
|
switch (*fmt) {
|
case '-': flags |= LEFT; goto repeat;
|
case '-': flags |= LEFT; goto repeat;
|
case '+': flags |= PLUS; goto repeat;
|
case '+': flags |= PLUS; goto repeat;
|
case ' ': flags |= SPACE; goto repeat;
|
case ' ': flags |= SPACE; goto repeat;
|
case '#': flags |= SPECIAL; goto repeat;
|
case '#': flags |= SPECIAL; goto repeat;
|
case '0': flags |= ZEROPAD; goto repeat;
|
case '0': flags |= ZEROPAD; goto repeat;
|
}
|
}
|
|
|
/* get field width */
|
/* get field width */
|
field_width = -1;
|
field_width = -1;
|
if (isdigit(*fmt))
|
if (isdigit(*fmt))
|
field_width = skip_atoi(&fmt);
|
field_width = skip_atoi(&fmt);
|
else if (*fmt == '*') {
|
else if (*fmt == '*') {
|
++fmt;
|
++fmt;
|
/* it's the next argument */
|
/* it's the next argument */
|
field_width = va_arg(args, int);
|
field_width = va_arg(args, int);
|
if (field_width < 0) {
|
if (field_width < 0) {
|
field_width = -field_width;
|
field_width = -field_width;
|
flags |= LEFT;
|
flags |= LEFT;
|
}
|
}
|
}
|
}
|
|
|
/* get the precision */
|
/* get the precision */
|
precision = -1;
|
precision = -1;
|
if (*fmt == '.') {
|
if (*fmt == '.') {
|
++fmt;
|
++fmt;
|
if (isdigit(*fmt))
|
if (isdigit(*fmt))
|
precision = skip_atoi(&fmt);
|
precision = skip_atoi(&fmt);
|
else if (*fmt == '*') {
|
else if (*fmt == '*') {
|
++fmt;
|
++fmt;
|
/* it's the next argument */
|
/* it's the next argument */
|
precision = va_arg(args, int);
|
precision = va_arg(args, int);
|
}
|
}
|
if (precision < 0)
|
if (precision < 0)
|
precision = 0;
|
precision = 0;
|
}
|
}
|
|
|
/* get the conversion qualifier */
|
/* get the conversion qualifier */
|
qualifier = -1;
|
qualifier = -1;
|
if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
|
if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
|
*fmt =='Z' || *fmt == 'z') {
|
*fmt =='Z' || *fmt == 'z') {
|
qualifier = *fmt;
|
qualifier = *fmt;
|
++fmt;
|
++fmt;
|
if (qualifier == 'l' && *fmt == 'l') {
|
if (qualifier == 'l' && *fmt == 'l') {
|
qualifier = 'L';
|
qualifier = 'L';
|
++fmt;
|
++fmt;
|
}
|
}
|
}
|
}
|
|
|
/* default base */
|
/* default base */
|
base = 10;
|
base = 10;
|
|
|
switch (*fmt) {
|
switch (*fmt) {
|
case 'c':
|
case 'c':
|
if (!(flags & LEFT)) {
|
if (!(flags & LEFT)) {
|
while (--field_width > 0) {
|
while (--field_width > 0) {
|
if (str <= end)
|
if (str <= end)
|
*str = ' ';
|
*str = ' ';
|
++str;
|
++str;
|
}
|
}
|
}
|
}
|
c = (unsigned char) va_arg(args, int);
|
c = (unsigned char) va_arg(args, int);
|
if (str <= end)
|
if (str <= end)
|
*str = c;
|
*str = c;
|
++str;
|
++str;
|
while (--field_width > 0) {
|
while (--field_width > 0) {
|
if (str <= end)
|
if (str <= end)
|
*str = ' ';
|
*str = ' ';
|
++str;
|
++str;
|
}
|
}
|
continue;
|
continue;
|
|
|
case 's':
|
case 's':
|
s = va_arg(args, char *);
|
s = va_arg(args, char *);
|
if ((unsigned long)s < PAGE_SIZE)
|
if ((unsigned long)s < PAGE_SIZE)
|
s = "<NULL>";
|
s = "<NULL>";
|
|
|
len = strnlen(s, precision);
|
len = strnlen(s, precision);
|
|
|
if (!(flags & LEFT)) {
|
if (!(flags & LEFT)) {
|
while (len < field_width--) {
|
while (len < field_width--) {
|
if (str <= end)
|
if (str <= end)
|
*str = ' ';
|
*str = ' ';
|
++str;
|
++str;
|
}
|
}
|
}
|
}
|
for (i = 0; i < len; ++i) {
|
for (i = 0; i < len; ++i) {
|
if (str <= end)
|
if (str <= end)
|
*str = *s;
|
*str = *s;
|
++str; ++s;
|
++str; ++s;
|
}
|
}
|
while (len < field_width--) {
|
while (len < field_width--) {
|
if (str <= end)
|
if (str <= end)
|
*str = ' ';
|
*str = ' ';
|
++str;
|
++str;
|
}
|
}
|
continue;
|
continue;
|
|
|
case 'p':
|
case 'p':
|
if (field_width == -1) {
|
if (field_width == -1) {
|
field_width = 2*sizeof(void *);
|
field_width = 2*sizeof(void *);
|
flags |= ZEROPAD;
|
flags |= ZEROPAD;
|
}
|
}
|
str = number(str, end,
|
str = number(str, end,
|
(unsigned long) va_arg(args, void *),
|
(unsigned long) va_arg(args, void *),
|
16, field_width, precision, flags);
|
16, field_width, precision, flags);
|
continue;
|
continue;
|
|
|
|
|
case 'n':
|
case 'n':
|
/* FIXME:
|
/* FIXME:
|
* What does C99 say about the overflow case here? */
|
* What does C99 say about the overflow case here? */
|
if (qualifier == 'l') {
|
if (qualifier == 'l') {
|
long * ip = va_arg(args, long *);
|
long * ip = va_arg(args, long *);
|
*ip = (str - buf);
|
*ip = (str - buf);
|
} else if (qualifier == 'Z' || qualifier == 'z') {
|
} else if (qualifier == 'Z' || qualifier == 'z') {
|
size_t * ip = va_arg(args, size_t *);
|
size_t * ip = va_arg(args, size_t *);
|
*ip = (str - buf);
|
*ip = (str - buf);
|
} else {
|
} else {
|
int * ip = va_arg(args, int *);
|
int * ip = va_arg(args, int *);
|
*ip = (str - buf);
|
*ip = (str - buf);
|
}
|
}
|
continue;
|
continue;
|
|
|
case '%':
|
case '%':
|
if (str <= end)
|
if (str <= end)
|
*str = '%';
|
*str = '%';
|
++str;
|
++str;
|
continue;
|
continue;
|
|
|
/* integer number formats - set up the flags and "break" */
|
/* integer number formats - set up the flags and "break" */
|
case 'o':
|
case 'o':
|
base = 8;
|
base = 8;
|
break;
|
break;
|
|
|
case 'X':
|
case 'X':
|
flags |= LARGE;
|
flags |= LARGE;
|
case 'x':
|
case 'x':
|
base = 16;
|
base = 16;
|
break;
|
break;
|
|
|
case 'd':
|
case 'd':
|
case 'i':
|
case 'i':
|
flags |= SIGN;
|
flags |= SIGN;
|
case 'u':
|
case 'u':
|
break;
|
break;
|
|
|
default:
|
default:
|
if (str <= end)
|
if (str <= end)
|
*str = '%';
|
*str = '%';
|
++str;
|
++str;
|
if (*fmt) {
|
if (*fmt) {
|
if (str <= end)
|
if (str <= end)
|
*str = *fmt;
|
*str = *fmt;
|
++str;
|
++str;
|
} else {
|
} else {
|
--fmt;
|
--fmt;
|
}
|
}
|
continue;
|
continue;
|
}
|
}
|
if (qualifier == 'L')
|
if (qualifier == 'L')
|
num = va_arg(args, long long);
|
num = va_arg(args, long long);
|
else if (qualifier == 'l') {
|
else if (qualifier == 'l') {
|
num = va_arg(args, unsigned long);
|
num = va_arg(args, unsigned long);
|
if (flags & SIGN)
|
if (flags & SIGN)
|
num = (signed long) num;
|
num = (signed long) num;
|
} else if (qualifier == 'Z' || qualifier == 'z') {
|
} else if (qualifier == 'Z' || qualifier == 'z') {
|
num = va_arg(args, size_t);
|
num = va_arg(args, size_t);
|
} else if (qualifier == 'h') {
|
} else if (qualifier == 'h') {
|
num = (unsigned short) va_arg(args, int);
|
num = (unsigned short) va_arg(args, int);
|
if (flags & SIGN)
|
if (flags & SIGN)
|
num = (signed short) num;
|
num = (signed short) num;
|
} else {
|
} else {
|
num = va_arg(args, unsigned int);
|
num = va_arg(args, unsigned int);
|
if (flags & SIGN)
|
if (flags & SIGN)
|
num = (signed int) num;
|
num = (signed int) num;
|
}
|
}
|
str = number(str, end, num, base,
|
str = number(str, end, num, base,
|
field_width, precision, flags);
|
field_width, precision, flags);
|
}
|
}
|
if (str <= end)
|
if (str <= end)
|
*str = '\0';
|
*str = '\0';
|
else if (size > 0)
|
else if (size > 0)
|
/* don't write out a null byte if the buf size is zero */
|
/* don't write out a null byte if the buf size is zero */
|
*end = '\0';
|
*end = '\0';
|
/* the trailing null byte doesn't count towards the total
|
/* the trailing null byte doesn't count towards the total
|
* ++str;
|
* ++str;
|
*/
|
*/
|
return str-buf;
|
return str-buf;
|
}
|
}
|
|
|
/**
|
/**
|
* snprintf - Format a string and place it in a buffer
|
* snprintf - Format a string and place it in a buffer
|
* @buf: The buffer to place the result into
|
* @buf: The buffer to place the result into
|
* @size: The size of the buffer, including the trailing null space
|
* @size: The size of the buffer, including the trailing null space
|
* @fmt: The format string to use
|
* @fmt: The format string to use
|
* @...: Arguments for the format string
|
* @...: Arguments for the format string
|
*/
|
*/
|
int snprintf(char * buf, size_t size, const char *fmt, ...)
|
int snprintf(char * buf, size_t size, const char *fmt, ...)
|
{
|
{
|
va_list args;
|
va_list args;
|
int i;
|
int i;
|
|
|
va_start(args, fmt);
|
va_start(args, fmt);
|
i=vsnprintf(buf,size,fmt,args);
|
i=vsnprintf(buf,size,fmt,args);
|
va_end(args);
|
va_end(args);
|
return i;
|
return i;
|
}
|
}
|
|
|
/**
|
/**
|
* vsprintf - Format a string and place it in a buffer
|
* vsprintf - Format a string and place it in a buffer
|
* @buf: The buffer to place the result into
|
* @buf: The buffer to place the result into
|
* @fmt: The format string to use
|
* @fmt: The format string to use
|
* @args: Arguments for the format string
|
* @args: Arguments for the format string
|
*
|
*
|
* Call this function if you are already dealing with a va_list.
|
* Call this function if you are already dealing with a va_list.
|
* You probably want sprintf instead.
|
* You probably want sprintf instead.
|
*/
|
*/
|
int vsprintf(char *buf, const char *fmt, va_list args)
|
int vsprintf(char *buf, const char *fmt, va_list args)
|
{
|
{
|
return vsnprintf(buf, (~0U)>>1, fmt, args);
|
return vsnprintf(buf, (~0U)>>1, fmt, args);
|
}
|
}
|
|
|
|
|
/**
|
/**
|
* sprintf - Format a string and place it in a buffer
|
* sprintf - Format a string and place it in a buffer
|
* @buf: The buffer to place the result into
|
* @buf: The buffer to place the result into
|
* @fmt: The format string to use
|
* @fmt: The format string to use
|
* @...: Arguments for the format string
|
* @...: Arguments for the format string
|
*/
|
*/
|
int sprintf(char * buf, const char *fmt, ...)
|
int sprintf(char * buf, const char *fmt, ...)
|
{
|
{
|
va_list args;
|
va_list args;
|
int i;
|
int i;
|
|
|
va_start(args, fmt);
|
va_start(args, fmt);
|
i=vsprintf(buf,fmt,args);
|
i=vsprintf(buf,fmt,args);
|
va_end(args);
|
va_end(args);
|
return i;
|
return i;
|
}
|
}
|
|
|
/**
|
/**
|
* vsscanf - Unformat a buffer into a list of arguments
|
* vsscanf - Unformat a buffer into a list of arguments
|
* @buf: input buffer
|
* @buf: input buffer
|
* @fmt: format of buffer
|
* @fmt: format of buffer
|
* @args: arguments
|
* @args: arguments
|
*/
|
*/
|
int vsscanf(const char * buf, const char * fmt, va_list args)
|
int vsscanf(const char * buf, const char * fmt, va_list args)
|
{
|
{
|
const char *str = buf;
|
const char *str = buf;
|
char *next;
|
char *next;
|
char digit;
|
char digit;
|
int num = 0;
|
int num = 0;
|
int qualifier;
|
int qualifier;
|
int base;
|
int base;
|
int field_width;
|
int field_width;
|
int is_sign = 0;
|
int is_sign = 0;
|
|
|
while(*fmt && *str) {
|
while(*fmt && *str) {
|
/* skip any white space in format */
|
/* skip any white space in format */
|
/* white space in format matchs any amount of
|
/* white space in format matchs any amount of
|
* white space, including none, in the input.
|
* white space, including none, in the input.
|
*/
|
*/
|
if (isspace(*fmt)) {
|
if (isspace(*fmt)) {
|
while (isspace(*fmt))
|
while (isspace(*fmt))
|
++fmt;
|
++fmt;
|
while (isspace(*str))
|
while (isspace(*str))
|
++str;
|
++str;
|
}
|
}
|
|
|
/* anything that is not a conversion must match exactly */
|
/* anything that is not a conversion must match exactly */
|
if (*fmt != '%' && *fmt) {
|
if (*fmt != '%' && *fmt) {
|
if (*fmt++ != *str++)
|
if (*fmt++ != *str++)
|
break;
|
break;
|
continue;
|
continue;
|
}
|
}
|
|
|
if (!*fmt)
|
if (!*fmt)
|
break;
|
break;
|
++fmt;
|
++fmt;
|
|
|
/* skip this conversion.
|
/* skip this conversion.
|
* advance both strings to next white space
|
* advance both strings to next white space
|
*/
|
*/
|
if (*fmt == '*') {
|
if (*fmt == '*') {
|
while (!isspace(*fmt) && *fmt)
|
while (!isspace(*fmt) && *fmt)
|
fmt++;
|
fmt++;
|
while (!isspace(*str) && *str)
|
while (!isspace(*str) && *str)
|
str++;
|
str++;
|
continue;
|
continue;
|
}
|
}
|
|
|
/* get field width */
|
/* get field width */
|
field_width = -1;
|
field_width = -1;
|
if (isdigit(*fmt))
|
if (isdigit(*fmt))
|
field_width = skip_atoi(&fmt);
|
field_width = skip_atoi(&fmt);
|
|
|
/* get conversion qualifier */
|
/* get conversion qualifier */
|
qualifier = -1;
|
qualifier = -1;
|
if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
|
if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
|
*fmt == 'Z' || *fmt == 'z') {
|
*fmt == 'Z' || *fmt == 'z') {
|
qualifier = *fmt;
|
qualifier = *fmt;
|
fmt++;
|
fmt++;
|
}
|
}
|
base = 10;
|
base = 10;
|
is_sign = 0;
|
is_sign = 0;
|
|
|
if (!*fmt || !*str)
|
if (!*fmt || !*str)
|
break;
|
break;
|
|
|
switch(*fmt++) {
|
switch(*fmt++) {
|
case 'c':
|
case 'c':
|
{
|
{
|
char *s = (char *) va_arg(args,char*);
|
char *s = (char *) va_arg(args,char*);
|
if (field_width == -1)
|
if (field_width == -1)
|
field_width = 1;
|
field_width = 1;
|
do {
|
do {
|
*s++ = *str++;
|
*s++ = *str++;
|
} while (--field_width > 0 && *str);
|
} while (--field_width > 0 && *str);
|
num++;
|
num++;
|
}
|
}
|
continue;
|
continue;
|
case 's':
|
case 's':
|
{
|
{
|
char *s = (char *) va_arg(args, char *);
|
char *s = (char *) va_arg(args, char *);
|
if(field_width == -1)
|
if(field_width == -1)
|
field_width = INT_MAX;
|
field_width = INT_MAX;
|
/* first, skip leading white space in buffer */
|
/* first, skip leading white space in buffer */
|
while (isspace(*str))
|
while (isspace(*str))
|
str++;
|
str++;
|
|
|
/* now copy until next white space */
|
/* now copy until next white space */
|
while (*str && !isspace(*str) && field_width--) {
|
while (*str && !isspace(*str) && field_width--) {
|
*s++ = *str++;
|
*s++ = *str++;
|
}
|
}
|
*s = '\0';
|
*s = '\0';
|
num++;
|
num++;
|
}
|
}
|
continue;
|
continue;
|
case 'n':
|
case 'n':
|
/* return number of characters read so far */
|
/* return number of characters read so far */
|
{
|
{
|
int *i = (int *)va_arg(args,int*);
|
int *i = (int *)va_arg(args,int*);
|
*i = str - buf;
|
*i = str - buf;
|
}
|
}
|
continue;
|
continue;
|
case 'o':
|
case 'o':
|
base = 8;
|
base = 8;
|
break;
|
break;
|
case 'x':
|
case 'x':
|
case 'X':
|
case 'X':
|
base = 16;
|
base = 16;
|
break;
|
break;
|
case 'i':
|
case 'i':
|
base = 0;
|
base = 0;
|
case 'd':
|
case 'd':
|
is_sign = 1;
|
is_sign = 1;
|
case 'u':
|
case 'u':
|
break;
|
break;
|
case '%':
|
case '%':
|
/* looking for '%' in str */
|
/* looking for '%' in str */
|
if (*str++ != '%')
|
if (*str++ != '%')
|
return num;
|
return num;
|
continue;
|
continue;
|
default:
|
default:
|
/* invalid format; stop here */
|
/* invalid format; stop here */
|
return num;
|
return num;
|
}
|
}
|
|
|
/* have some sort of integer conversion.
|
/* have some sort of integer conversion.
|
* first, skip white space in buffer.
|
* first, skip white space in buffer.
|
*/
|
*/
|
while (isspace(*str))
|
while (isspace(*str))
|
str++;
|
str++;
|
|
|
digit = *str;
|
digit = *str;
|
if (is_sign && digit == '-')
|
if (is_sign && digit == '-')
|
digit = *(str + 1);
|
digit = *(str + 1);
|
|
|
if (!digit
|
if (!digit
|
|| (base == 16 && !isxdigit(digit))
|
|| (base == 16 && !isxdigit(digit))
|
|| (base == 10 && !isdigit(digit))
|
|| (base == 10 && !isdigit(digit))
|
|| (base == 8 && (!isdigit(digit) || digit > '7'))
|
|| (base == 8 && (!isdigit(digit) || digit > '7'))
|
|| (base == 0 && !isdigit(digit)))
|
|| (base == 0 && !isdigit(digit)))
|
break;
|
break;
|
|
|
switch(qualifier) {
|
switch(qualifier) {
|
case 'h':
|
case 'h':
|
if (is_sign) {
|
if (is_sign) {
|
short *s = (short *) va_arg(args,short *);
|
short *s = (short *) va_arg(args,short *);
|
*s = (short) simple_strtol(str,&next,base);
|
*s = (short) simple_strtol(str,&next,base);
|
} else {
|
} else {
|
unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
|
unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
|
*s = (unsigned short) simple_strtoul(str, &next, base);
|
*s = (unsigned short) simple_strtoul(str, &next, base);
|
}
|
}
|
break;
|
break;
|
case 'l':
|
case 'l':
|
if (is_sign) {
|
if (is_sign) {
|
long *l = (long *) va_arg(args,long *);
|
long *l = (long *) va_arg(args,long *);
|
*l = simple_strtol(str,&next,base);
|
*l = simple_strtol(str,&next,base);
|
} else {
|
} else {
|
unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
|
unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
|
*l = simple_strtoul(str,&next,base);
|
*l = simple_strtoul(str,&next,base);
|
}
|
}
|
break;
|
break;
|
case 'L':
|
case 'L':
|
if (is_sign) {
|
if (is_sign) {
|
long long *l = (long long*) va_arg(args,long long *);
|
long long *l = (long long*) va_arg(args,long long *);
|
*l = simple_strtoll(str,&next,base);
|
*l = simple_strtoll(str,&next,base);
|
} else {
|
} else {
|
unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
|
unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
|
*l = simple_strtoull(str,&next,base);
|
*l = simple_strtoull(str,&next,base);
|
}
|
}
|
break;
|
break;
|
case 'Z':
|
case 'Z':
|
case 'z':
|
case 'z':
|
{
|
{
|
size_t *s = (size_t*) va_arg(args,size_t*);
|
size_t *s = (size_t*) va_arg(args,size_t*);
|
*s = (size_t) simple_strtoul(str,&next,base);
|
*s = (size_t) simple_strtoul(str,&next,base);
|
}
|
}
|
break;
|
break;
|
default:
|
default:
|
if (is_sign) {
|
if (is_sign) {
|
int *i = (int *) va_arg(args, int*);
|
int *i = (int *) va_arg(args, int*);
|
*i = (int) simple_strtol(str,&next,base);
|
*i = (int) simple_strtol(str,&next,base);
|
} else {
|
} else {
|
unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
|
unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
|
*i = (unsigned int) simple_strtoul(str,&next,base);
|
*i = (unsigned int) simple_strtoul(str,&next,base);
|
}
|
}
|
break;
|
break;
|
}
|
}
|
num++;
|
num++;
|
|
|
if (!next)
|
if (!next)
|
break;
|
break;
|
str = next;
|
str = next;
|
}
|
}
|
return num;
|
return num;
|
}
|
}
|
|
|
/**
|
/**
|
* sscanf - Unformat a buffer into a list of arguments
|
* sscanf - Unformat a buffer into a list of arguments
|
* @buf: input buffer
|
* @buf: input buffer
|
* @fmt: formatting of buffer
|
* @fmt: formatting of buffer
|
* @...: resulting arguments
|
* @...: resulting arguments
|
*/
|
*/
|
int sscanf(const char * buf, const char * fmt, ...)
|
int sscanf(const char * buf, const char * fmt, ...)
|
{
|
{
|
va_list args;
|
va_list args;
|
int i;
|
int i;
|
|
|
va_start(args,fmt);
|
va_start(args,fmt);
|
i = vsscanf(buf,fmt,args);
|
i = vsscanf(buf,fmt,args);
|
va_end(args);
|
va_end(args);
|
return i;
|
return i;
|
}
|
}
|
|
|
