335 lines
6.8 KiB
C
335 lines
6.8 KiB
C
/*
|
|
* Copyright (C) Paul Mackerras 1997.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <stdarg.h>
|
|
#include <stddef.h>
|
|
#include "string.h"
|
|
#include "stdio.h"
|
|
#include "ops.h"
|
|
|
|
size_t strnlen(const char * s, size_t count)
|
|
{
|
|
const char *sc;
|
|
|
|
for (sc = s; count-- && *sc != '\0'; ++sc)
|
|
/* nothing */;
|
|
return sc - s;
|
|
}
|
|
|
|
extern unsigned int __div64_32(unsigned long long *dividend,
|
|
unsigned int divisor);
|
|
|
|
/* The unnecessary pointer compare is there
|
|
* to check for type safety (n must be 64bit)
|
|
*/
|
|
# define do_div(n,base) ({ \
|
|
unsigned int __base = (base); \
|
|
unsigned int __rem; \
|
|
(void)(((typeof((n)) *)0) == ((unsigned long long *)0)); \
|
|
if (((n) >> 32) == 0) { \
|
|
__rem = (unsigned int)(n) % __base; \
|
|
(n) = (unsigned int)(n) / __base; \
|
|
} else \
|
|
__rem = __div64_32(&(n), __base); \
|
|
__rem; \
|
|
})
|
|
|
|
static int skip_atoi(const char **s)
|
|
{
|
|
int i, c;
|
|
|
|
for (i = 0; '0' <= (c = **s) && c <= '9'; ++*s)
|
|
i = i*10 + c - '0';
|
|
return i;
|
|
}
|
|
|
|
#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 * str, unsigned long long num, int base, int size, int precision, int type)
|
|
{
|
|
char c,sign,tmp[66];
|
|
const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
|
|
int i;
|
|
|
|
if (type & LARGE)
|
|
digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
|
|
if (type & LEFT)
|
|
type &= ~ZEROPAD;
|
|
if (base < 2 || base > 36)
|
|
return 0;
|
|
c = (type & ZEROPAD) ? '0' : ' ';
|
|
sign = 0;
|
|
if (type & SIGN) {
|
|
if ((signed long long)num < 0) {
|
|
sign = '-';
|
|
num = - (signed long long)num;
|
|
size--;
|
|
} else if (type & PLUS) {
|
|
sign = '+';
|
|
size--;
|
|
} else if (type & SPACE) {
|
|
sign = ' ';
|
|
size--;
|
|
}
|
|
}
|
|
if (type & SPECIAL) {
|
|
if (base == 16)
|
|
size -= 2;
|
|
else if (base == 8)
|
|
size--;
|
|
}
|
|
i = 0;
|
|
if (num == 0)
|
|
tmp[i++]='0';
|
|
else while (num != 0) {
|
|
tmp[i++] = digits[do_div(num, base)];
|
|
}
|
|
if (i > precision)
|
|
precision = i;
|
|
size -= precision;
|
|
if (!(type&(ZEROPAD+LEFT)))
|
|
while(size-->0)
|
|
*str++ = ' ';
|
|
if (sign)
|
|
*str++ = sign;
|
|
if (type & SPECIAL) {
|
|
if (base==8)
|
|
*str++ = '0';
|
|
else if (base==16) {
|
|
*str++ = '0';
|
|
*str++ = digits[33];
|
|
}
|
|
}
|
|
if (!(type & LEFT))
|
|
while (size-- > 0)
|
|
*str++ = c;
|
|
while (i < precision--)
|
|
*str++ = '0';
|
|
while (i-- > 0)
|
|
*str++ = tmp[i];
|
|
while (size-- > 0)
|
|
*str++ = ' ';
|
|
return str;
|
|
}
|
|
|
|
int vsprintf(char *buf, const char *fmt, va_list args)
|
|
{
|
|
int len;
|
|
unsigned long long num;
|
|
int i, base;
|
|
char * str;
|
|
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 */
|
|
|
|
|
|
for (str=buf ; *fmt ; ++fmt) {
|
|
if (*fmt != '%') {
|
|
*str++ = *fmt;
|
|
continue;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* get field width */
|
|
field_width = -1;
|
|
if ('0' <= *fmt && *fmt <= '9')
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* get the precision */
|
|
precision = -1;
|
|
if (*fmt == '.') {
|
|
++fmt;
|
|
if ('0' <= *fmt && *fmt <= '9')
|
|
precision = skip_atoi(&fmt);
|
|
else if (*fmt == '*') {
|
|
++fmt;
|
|
/* it's the next argument */
|
|
precision = va_arg(args, int);
|
|
}
|
|
if (precision < 0)
|
|
precision = 0;
|
|
}
|
|
|
|
/* get the conversion qualifier */
|
|
qualifier = -1;
|
|
if (*fmt == 'l' && *(fmt + 1) == 'l') {
|
|
qualifier = 'q';
|
|
fmt += 2;
|
|
} else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L'
|
|
|| *fmt == 'Z') {
|
|
qualifier = *fmt;
|
|
++fmt;
|
|
}
|
|
|
|
/* default base */
|
|
base = 10;
|
|
|
|
switch (*fmt) {
|
|
case 'c':
|
|
if (!(flags & LEFT))
|
|
while (--field_width > 0)
|
|
*str++ = ' ';
|
|
*str++ = (unsigned char) va_arg(args, int);
|
|
while (--field_width > 0)
|
|
*str++ = ' ';
|
|
continue;
|
|
|
|
case 's':
|
|
s = va_arg(args, char *);
|
|
if (!s)
|
|
s = "<NULL>";
|
|
|
|
len = strnlen(s, precision);
|
|
|
|
if (!(flags & LEFT))
|
|
while (len < field_width--)
|
|
*str++ = ' ';
|
|
for (i = 0; i < len; ++i)
|
|
*str++ = *s++;
|
|
while (len < field_width--)
|
|
*str++ = ' ';
|
|
continue;
|
|
|
|
case 'p':
|
|
if (field_width == -1) {
|
|
field_width = 2*sizeof(void *);
|
|
flags |= ZEROPAD;
|
|
}
|
|
str = number(str,
|
|
(unsigned long) va_arg(args, void *), 16,
|
|
field_width, precision, flags);
|
|
continue;
|
|
|
|
|
|
case 'n':
|
|
if (qualifier == 'l') {
|
|
long * ip = va_arg(args, long *);
|
|
*ip = (str - buf);
|
|
} else if (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 '%':
|
|
*str++ = '%';
|
|
continue;
|
|
|
|
/* integer number formats - set up the flags and "break" */
|
|
case 'o':
|
|
base = 8;
|
|
break;
|
|
|
|
case 'X':
|
|
flags |= LARGE;
|
|
case 'x':
|
|
base = 16;
|
|
break;
|
|
|
|
case 'd':
|
|
case 'i':
|
|
flags |= SIGN;
|
|
case 'u':
|
|
break;
|
|
|
|
default:
|
|
*str++ = '%';
|
|
if (*fmt)
|
|
*str++ = *fmt;
|
|
else
|
|
--fmt;
|
|
continue;
|
|
}
|
|
if (qualifier == 'l') {
|
|
num = va_arg(args, unsigned long);
|
|
if (flags & SIGN)
|
|
num = (signed long) num;
|
|
} else if (qualifier == 'q') {
|
|
num = va_arg(args, unsigned long long);
|
|
if (flags & SIGN)
|
|
num = (signed long long) num;
|
|
} else if (qualifier == 'Z') {
|
|
num = va_arg(args, size_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;
|
|
}
|
|
str = number(str, num, base, field_width, precision, flags);
|
|
}
|
|
*str = '\0';
|
|
return str-buf;
|
|
}
|
|
|
|
int sprintf(char * buf, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int i;
|
|
|
|
va_start(args, fmt);
|
|
i=vsprintf(buf,fmt,args);
|
|
va_end(args);
|
|
return i;
|
|
}
|
|
|
|
static char sprint_buf[1024];
|
|
|
|
int
|
|
printf(const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
int n;
|
|
|
|
va_start(args, fmt);
|
|
n = vsprintf(sprint_buf, fmt, args);
|
|
va_end(args);
|
|
if (console_ops.write)
|
|
console_ops.write(sprint_buf, n);
|
|
return n;
|
|
}
|