reactos/irc/ArchBlackmann/ssprintf.cpp

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// ssprintf.cpp
#include <malloc.h>
#include <math.h>
#include <float.h>
#include <assert.h>
#include "ssprintf.h"
#ifdef _MSC_VER
#define alloca _alloca
#endif//_MSC_VER
typedef __int64 LONGLONG;
typedef unsigned __int64 ULONGLONG;
typedef struct {
unsigned int mantissa:23;
unsigned int exponent:8;
unsigned int sign:1;
} ieee_float_t;
typedef struct {
unsigned int mantissal:32;
unsigned int mantissah:20;
unsigned int exponent:11;
unsigned int sign:1;
} ieee_double_t;
typedef struct {
unsigned int mantissal:32;
unsigned int mantissah:32;
unsigned int exponent:15;
unsigned int sign:1;
unsigned int empty:16;
} ieee_long_double_t;
std::string ssprintf ( const char* fmt, ... )
{
va_list arg;
va_start(arg, fmt);
std::string f = ssvprintf ( fmt, arg );
va_end(arg);
return f;
}
#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' */
#define ZEROTRUNC 128 /* truncate zero 's */
static int skip_atoi(const char **s)
{
int i=0;
while (isdigit(**s))
i = i*10 + *((*s)++) - '0';
return i;
}
static int do_div(LONGLONG *n,int base)
{
int __res = ((ULONGLONG) *n) % (unsigned) base;
*n = ((ULONGLONG) *n) / (unsigned) base;
return __res;
}
static bool number(std::string& f, LONGLONG 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 (num < 0) {
sign = '-';
num = -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)
f += ' ';
if (sign)
f += sign;
if (type & SPECIAL)
{
if (base==8)
f += '0';
else if (base==16)
{
f += '0';
f += digits[33];
}
}
if (!(type & LEFT))
{
while (size-- > 0)
f += c;
}
while (i < precision--)
{
f += '0';
}
while (i-- > 0)
{
f += tmp[i];
}
while (size-- > 0)
{
f += ' ';
}
return true;
}
static bool numberf(std::string& f, double __n, char exp_sign, int size, int precision, int type)
{
double exponent = 0.0;
double e;
long ie;
//int x;
char *buf, *tmp;
int i = 0;
int j = 0;
//int k = 0;
double frac, intr;
double p;
char sign;
char c;
char ro = 0;
int result;
union
{
double* __n;
ieee_double_t* n;
} n;
n.__n = &__n;
if ( exp_sign == 'g' || exp_sign == 'G' || exp_sign == 'e' || exp_sign == 'E' ) {
ie = ((unsigned int)n.n->exponent - (unsigned int)0x3ff);
exponent = ie/3.321928;
}
if ( exp_sign == 'g' || exp_sign == 'G' ) {
type |= ZEROTRUNC;
if ( exponent < -4 || fabs(exponent) >= precision )
exp_sign -= 2; // g -> e and G -> E
}
if ( exp_sign == 'e' || exp_sign == 'E' ) {
frac = modf(exponent,&e);
if ( frac > 0.5 )
e++;
else if ( frac < -0.5 )
e--;
result = numberf(f,__n/pow(10.0L,e),'f',size-4, precision, type);
if (result < 0)
return false;
f += exp_sign;
size--;
ie = (long)e;
type = LEFT | PLUS;
if ( ie < 0 )
type |= SIGN;
result = number(f,ie, 10,2, 2,type );
if (result < 0)
return false;
return true;
}
if ( exp_sign == 'f' ) {
buf = (char*)alloca(4096);
if (type & LEFT) {
type &= ~ZEROPAD;
}
c = (type & ZEROPAD) ? '0' : ' ';
sign = 0;
if (type & SIGN) {
if (__n < 0) {
sign = '-';
__n = fabs(__n);
size--;
} else if (type & PLUS) {
sign = '+';
size--;
} else if (type & SPACE) {
sign = ' ';
size--;
}
}
frac = modf(__n,&intr);
// # flags forces a . and prevents trucation of trailing zero's
if ( precision > 0 ) {
//frac = modfl(__n,&intr);
i = precision-1;
while ( i >= 0 ) {
frac*=10.0L;
frac = modf(frac, &p);
buf[i] = (int)p + '0';
i--;
}
i = precision;
size -= precision;
ro = 0;
if ( frac > 0.5 ) {
ro = 1;
}
if ( precision >= 1 || type & SPECIAL) {
buf[i++] = '.';
size--;
}
}
if ( intr == 0.0 ) {
buf[i++] = '0';
size--;
}
else {
while ( intr > 0.0 ) {
p = intr;
intr/=10.0L;
modf(intr, &intr);
p -= 10.0*intr;
buf[i++] = (int)p + '0';
size--;
}
}
j = 0;
while ( j < i && ro == 1) {
if ( buf[j] >= '0' && buf[j] <= '8' ) {
buf[j]++;
ro = 0;
}
else if ( buf[j] == '9' ) {
buf[j] = '0';
}
j++;
}
if ( ro == 1 )
buf[i++] = '1';
buf[i] = 0;
size -= precision;
if (!(type&(ZEROPAD+LEFT)))
{
while(size-->0)
f += ' ';
}
if (sign)
{
f += sign;
}
if (!(type&(ZEROPAD+LEFT)))
while(size-->0)
{
f += ' ';
}
if (type & SPECIAL) {
}
if (!(type & LEFT))
while (size-- > 0)
{
f += c;
}
tmp = buf;
if ( type & ZEROTRUNC && ((type & SPECIAL) != SPECIAL) )
{
j = 0;
while ( j < i && ( *tmp == '0' || *tmp == '.' ))
{
tmp++;
i--;
}
}
// else
// while (i < precision--)
// putc('0', f);
while (i-- > 0)
{
f += tmp[i];
}
while (size-- > 0)
{
f += ' ';
}
}
return true;
}
static bool numberfl(std::string& f, long double __n, char exp_sign, int size, int precision, int type)
{
long double exponent = 0.0;
long double e;
long ie;
//int x;
char *buf, *tmp;
int i = 0;
int j = 0;
//int k = 0;
long double frac, intr;
long double p;
char sign;
char c;
char ro = 0;
int result;
union
{
long double* __n;
ieee_long_double_t* n;
} n;
n.__n = &__n;
if ( exp_sign == 'g' || exp_sign == 'G' || exp_sign == 'e' || exp_sign == 'E' ) {
ie = ((unsigned int)n.n->exponent - (unsigned int)0x3fff);
exponent = ie/3.321928;
}
if ( exp_sign == 'g' || exp_sign == 'G' ) {
type |= ZEROTRUNC;
if ( exponent < -4 || fabs(exponent) >= precision )
exp_sign -= 2; // g -> e and G -> E
}
if ( exp_sign == 'e' || exp_sign == 'E' ) {
frac = modfl(exponent,&e);
if ( frac > 0.5 )
e++;
else if ( frac < -0.5 )
e--;
result = numberf(f,__n/powl(10.0L,e),'f',size-4, precision, type);
if (result < 0)
return false;
f += exp_sign;
size--;
ie = (long)e;
type = LEFT | PLUS;
if ( ie < 0 )
type |= SIGN;
result = number(f,ie, 10,2, 2,type );
if (result < 0)
return false;
return true;
}
if ( exp_sign == 'f' )
{
buf = (char*)alloca(4096);
if (type & LEFT)
{
type &= ~ZEROPAD;
}
c = (type & ZEROPAD) ? '0' : ' ';
sign = 0;
if (type & SIGN)
{
if (__n < 0)
{
sign = '-';
__n = fabs(__n);
size--;
} else if (type & PLUS)
{
sign = '+';
size--;
} else if (type & SPACE)
{
sign = ' ';
size--;
}
}
frac = modfl(__n,&intr);
// # flags forces a . and prevents trucation of trailing zero's
if ( precision > 0 )
{
//frac = modfl(__n,&intr);
i = precision-1;
while ( i >= 0 )
{
frac*=10.0L;
frac = modfl((long double)frac, &p);
buf[i] = (int)p + '0';
i--;
}
i = precision;
size -= precision;
ro = 0;
if ( frac > 0.5 )
{
ro = 1;
}
if ( precision >= 1 || type & SPECIAL)
{
buf[i++] = '.';
size--;
}
}
if ( intr == 0.0 )
{
buf[i++] = '0';
size--;
}
else
{
while ( intr > 0.0 )
{
p=intr;
intr/=10.0L;
modfl(intr, &intr);
p -= 10.0L*intr;
buf[i++] = (int)p + '0';
size--;
}
}
j = 0;
while ( j < i && ro == 1) {
if ( buf[j] >= '0' && buf[j] <= '8' )
{
buf[j]++;
ro = 0;
}
else if ( buf[j] == '9' )
{
buf[j] = '0';
}
j++;
}
if ( ro == 1 )
buf[i++] = '1';
buf[i] = 0;
size -= precision;
if (!(type&(ZEROPAD+LEFT)))
{
while(size-->0)
f += ' ';
}
if (sign)
{
f += sign;
}
if (!(type&(ZEROPAD+LEFT)))
{
while(size-->0)
f += ' ';
}
if (type & SPECIAL) {
}
if (!(type & LEFT))
while (size-- > 0)
{
f += c;
}
tmp = buf;
if ( type & ZEROTRUNC && ((type & SPECIAL) != SPECIAL) )
{
j = 0;
while ( j < i && ( *tmp == '0' || *tmp == '.' ))
{
tmp++;
i--;
}
}
// else
// while (i < precision--)
// putc( '0', f);
while (i-- > 0)
{
f += tmp[i];
}
while (size-- > 0)
{
f += ' ';
}
}
return true;
}
static int stringa(std::string& f, const char* s, int len, int field_width, int precision, int flags)
{
int i, done = 0;
if (s == NULL)
{
s = "<NULL>";
len = 6;
}
else
{
if (len == -1)
{
len = 0;
while ((unsigned int)len < (unsigned int)precision && s[len])
len++;
}
else
{
if ((unsigned int)len > (unsigned int)precision)
len = precision;
}
}
if (!(flags & LEFT))
while (len < field_width--)
{
f += ' ';
done++;
}
for (i = 0; i < len; ++i)
{
f += *s++;
done++;
}
while (len < field_width--)
{
f += ' ';
done++;
}
return done;
}
static int stringw(std::string& f, const wchar_t* sw, int len, int field_width, int precision, int flags)
{
int i, done = 0;
if (sw == NULL)
{
sw = L"<NULL>";
len = 6;
}
else
{
if (len == -1)
{
len = 0;
while ((unsigned int)len < (unsigned int)precision && sw[len])
len++;
}
else
{
if ((unsigned int)len > (unsigned int)precision)
len = precision;
}
}
if (!(flags & LEFT))
while (len < field_width--)
{
f += ' ';
done++;
}
for (i = 0; i < len; ++i)
{
#define MY_MB_CUR_MAX 1
char mb[MY_MB_CUR_MAX];
int mbcount, j;
mbcount = wctomb(mb, *sw++);
if (mbcount <= 0)
{
break;
}
for (j = 0; j < mbcount; j++)
{
f += mb[j];
done++;
}
}
while (len < field_width--)
{
f += ' ';
done++;
}
return done;
}
#define _isnanl _isnan
#define _finitel _finite
std::string ssvprintf ( const char *fmt, va_list args )
{
ULONGLONG num;
int base;
long double _ldouble;
double _double;
const char *s;
const wchar_t* sw;
int result;
std::string f;
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 = 0; /* 'h', 'l', 'L' or 'I64' for integer fields */
for (; *fmt ; ++fmt)
{
if (*fmt != '%')
{
f += *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 (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;
}
}
/* 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);
}
if (precision < 0)
precision = 0;
}
/* get the conversion qualifier */
qualifier = 0;
// %Z can be just stand alone or as size_t qualifier
if ( *fmt == 'Z' ) {
qualifier = *fmt;
switch ( *(fmt+1)) {
case 'o':
case 'b':
case 'X':
case 'x':
case 'd':
case 'i':
case 'u':
++fmt;
break;
default:
break;
}
} else if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || *fmt == 'w') {
qualifier = *fmt;
++fmt;
} else if (*fmt == 'I' && *(fmt+1) == '6' && *(fmt+2) == '4') {
qualifier = *fmt;
fmt += 3;
}
// go fine with ll instead of L
if ( *fmt == 'l' ) {
++fmt;
qualifier = 'L';
}
/* default base */
base = 10;
switch (*fmt) {
case 'c':
if (!(flags & LEFT))
while (--field_width > 0)
{
f += ' ';
}
if (qualifier == 'l' || qualifier == 'w')
{
f += (char)(unsigned char)(wchar_t) va_arg(args,int);
}
else
{
f += (char)(unsigned char) va_arg(args,int);
}
while (--field_width > 0)
{
f += ' ';
}
continue;
case 'C':
if (!(flags & LEFT))
while (--field_width > 0)
{
f += ' ';
}
if (qualifier == 'h')
{
f += (char)(unsigned char) va_arg(args,int);
}
else
{
f += (char)(unsigned char)(wchar_t) va_arg(args,int);
}
while (--field_width > 0)
{
f += ' ';
}
continue;
case 's':
if (qualifier == 'l' || qualifier == 'w') {
/* print unicode string */
sw = (const wchar_t*)va_arg(args, wchar_t *);
result = stringw(f, sw, -1, field_width, precision, flags);
} else {
/* print ascii string */
s = va_arg(args, char *);
result = stringa(f, s, -1, field_width, precision, flags);
}
if (result < 0)
{
assert(!"TODO FIXME handle error better");
return f;
}
continue;
case 'S':
if (qualifier == 'h') {
/* print ascii string */
s = va_arg(args, char *);
result = stringa(f, s, -1, field_width, precision, flags);
} else {
/* print unicode string */
sw = (const wchar_t*)va_arg(args, wchar_t *);
result = stringw(f, sw, -1, field_width, precision, flags);
}
if (result < 0)
{
assert(!"TODO FIXME handle error better");
return f;
}
continue;
/*case 'Z':
if (qualifier == 'w') {
// print counted unicode string
PUNICODE_STRING pus = va_arg(args, PUNICODE_STRING);
if ((pus == NULL) || (pus->Buffer == NULL)) {
sw = NULL;
len = -1;
} else {
sw = pus->Buffer;
len = pus->Length / sizeof(WCHAR);
}
result = stringw(f, sw, len, field_width, precision, flags);
} else {
// print counted ascii string
PANSI_STRING pas = va_arg(args, PANSI_STRING);
if ((pas == NULL) || (pas->Buffer == NULL)) {
s = NULL;
len = -1;
} else {
s = pas->Buffer;
len = pas->Length;
}
result = stringa(f, s, -1, field_width, precision, flags);
}
if (result < 0)
return -1;
continue;*/
case 'e':
case 'E':
case 'f':
case 'g':
case 'G':
if (qualifier == 'l' || qualifier == 'L' ) {
_ldouble = va_arg(args, long double);
if ( _isnanl(_ldouble) )
{
f += "Nan";
}
else if ( !_finitel(_ldouble) )
{
if ( _ldouble < 0 )
f += "-Inf";
else
f += "+Inf";
} else {
if ( precision == -1 )
precision = 6;
result = numberfl(f,_ldouble,*fmt,field_width,precision,flags);
if (result < 0)
{
assert(!"TODO FIXME handle error better");
return f;
}
}
} else {
_double = (double)va_arg(args, double);
if ( _isnan(_double) )
{
f += "Nan";
}
else if ( !_finite(_double) )
{
if ( _double < 0 )
f += "-Inf";
else
f += "+Inf";
}
else
{
if ( precision == -1 )
precision = 6;
result = numberf(f,_double,*fmt,field_width,precision,flags);
if (result < 0)
{
assert(!"TODO FIXME handle error better");
return f;
}
}
}
continue;
case 'p':
if (field_width == -1) {
field_width = 2*sizeof(void *);
flags |= ZEROPAD;
}
result = number(f,
(unsigned long) va_arg(args, void *), 16,
field_width, precision, flags);
if (result < 0)
{
assert(!"TODO FIXME handle error better");
return f;
}
continue;
case 'n':
if (qualifier == 'l') {
long * ip = va_arg(args, long *);
*ip = 0;
} else {
int * ip = va_arg(args, int *);
*ip = 0;
}
continue;
/* integer number formats - set up the flags and "break" */
case 'o':
base = 8;
break;
case 'b':
base = 2;
break;
case 'X':
flags |= LARGE;
case 'x':
base = 16;
break;
case 'd':
case 'i':
flags |= SIGN;
case 'u':
break;
default:
if (*fmt != '%')
{
f += '%';
}
if (*fmt)
{
f += *fmt;
}
else
--fmt;
continue;
}
if (qualifier == 'I')
num = va_arg(args, ULONGLONG);
else if (qualifier == 'l') {
if (flags & SIGN)
num = va_arg(args, long);
else
num = va_arg(args, unsigned long);
}
else if (qualifier == 'h') {
if (flags & SIGN)
num = va_arg(args, int);
else
num = va_arg(args, unsigned int);
}
else if (flags & SIGN)
num = va_arg(args, int);
else
num = va_arg(args, unsigned int);
result = number(f, num, base, field_width, precision, flags);
if (result < 0)
{
assert(!"TODO FIXME handle error better");
return f;
}
}
//putc('\0',f);
return f;
}