mirror of
https://github.com/reactos/reactos.git
synced 2024-12-27 09:34:43 +00:00
998 lines
17 KiB
C++
998 lines
17 KiB
C++
// ssprintf.cpp
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#include <malloc.h>
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#include <math.h>
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#include <float.h>
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#include <assert.h>
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#include "ssprintf.h"
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#ifdef _MSC_VER
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#define alloca _alloca
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#endif//_MSC_VER
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typedef __int64 LONGLONG;
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typedef unsigned __int64 ULONGLONG;
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typedef struct {
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unsigned int mantissa:23;
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unsigned int exponent:8;
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unsigned int sign:1;
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} ieee_float_t;
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typedef struct {
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unsigned int mantissal:32;
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unsigned int mantissah:20;
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unsigned int exponent:11;
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unsigned int sign:1;
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} ieee_double_t;
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typedef struct {
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unsigned int mantissal:32;
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unsigned int mantissah:32;
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unsigned int exponent:15;
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unsigned int sign:1;
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unsigned int empty:16;
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} ieee_long_double_t;
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std::string ssprintf ( const char* fmt, ... )
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{
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va_list arg;
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va_start(arg, fmt);
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std::string f = ssvprintf ( fmt, arg );
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va_end(arg);
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return f;
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}
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#define ZEROPAD 1 /* pad with zero */
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#define SIGN 2 /* unsigned/signed long */
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#define PLUS 4 /* show plus */
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#define SPACE 8 /* space if plus */
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#define LEFT 16 /* left justified */
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#define SPECIAL 32 /* 0x */
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#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
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#define ZEROTRUNC 128 /* truncate zero 's */
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static int skip_atoi(const char **s)
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{
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int i=0;
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while (isdigit(**s))
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i = i*10 + *((*s)++) - '0';
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return i;
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}
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static int do_div(LONGLONG *n,int base)
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{
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int __res = ((ULONGLONG) *n) % (unsigned) base;
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*n = ((ULONGLONG) *n) / (unsigned) base;
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return __res;
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}
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static bool number(std::string& f, LONGLONG num, int base, int size, int precision ,int type)
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{
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char c,sign,tmp[66];
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const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
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int i;
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if (type & LARGE)
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digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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if (type & LEFT)
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type &= ~ZEROPAD;
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if (base < 2 || base > 36)
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return 0;
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c = (type & ZEROPAD) ? '0' : ' ';
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sign = 0;
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if (type & SIGN) {
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if (num < 0) {
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sign = '-';
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num = -num;
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size--;
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} else if (type & PLUS) {
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sign = '+';
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size--;
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} else if (type & SPACE) {
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sign = ' ';
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size--;
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}
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}
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if (type & SPECIAL) {
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if (base == 16)
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size -= 2;
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else if (base == 8)
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size--;
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}
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i = 0;
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if (num == 0)
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tmp[i++]='0';
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else while (num != 0)
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tmp[i++] = digits[do_div(&num,base)];
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if (i > precision)
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precision = i;
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size -= precision;
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if (!(type&(ZEROPAD+LEFT)))
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while(size-->0)
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f += ' ';
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if (sign)
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f += sign;
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if (type & SPECIAL)
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{
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if (base==8)
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f += '0';
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else if (base==16)
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{
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f += '0';
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f += digits[33];
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}
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}
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if (!(type & LEFT))
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{
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while (size-- > 0)
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f += c;
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}
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while (i < precision--)
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{
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f += '0';
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}
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while (i-- > 0)
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{
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f += tmp[i];
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}
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while (size-- > 0)
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{
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f += ' ';
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}
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return true;
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}
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static bool numberf(std::string& f, double __n, char exp_sign, int size, int precision, int type)
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{
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double exponent = 0.0;
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double e;
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long ie;
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//int x;
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char *buf, *tmp;
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int i = 0;
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int j = 0;
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//int k = 0;
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double frac, intr;
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double p;
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char sign;
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char c;
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char ro = 0;
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int result;
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union
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{
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double* __n;
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ieee_double_t* n;
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} n;
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n.__n = &__n;
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if ( exp_sign == 'g' || exp_sign == 'G' || exp_sign == 'e' || exp_sign == 'E' ) {
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ie = ((unsigned int)n.n->exponent - (unsigned int)0x3ff);
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exponent = ie/3.321928;
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}
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if ( exp_sign == 'g' || exp_sign == 'G' ) {
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type |= ZEROTRUNC;
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if ( exponent < -4 || fabs(exponent) >= precision )
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exp_sign -= 2; // g -> e and G -> E
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}
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if ( exp_sign == 'e' || exp_sign == 'E' ) {
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frac = modf(exponent,&e);
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if ( frac > 0.5 )
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e++;
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else if ( frac < -0.5 )
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e--;
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result = numberf(f,__n/pow(10.0L,e),'f',size-4, precision, type);
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if (result < 0)
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return false;
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f += exp_sign;
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size--;
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ie = (long)e;
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type = LEFT | PLUS;
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if ( ie < 0 )
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type |= SIGN;
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result = number(f,ie, 10,2, 2,type );
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if (result < 0)
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return false;
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return true;
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}
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if ( exp_sign == 'f' ) {
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buf = (char*)alloca(4096);
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if (type & LEFT) {
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type &= ~ZEROPAD;
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}
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c = (type & ZEROPAD) ? '0' : ' ';
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sign = 0;
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if (type & SIGN) {
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if (__n < 0) {
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sign = '-';
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__n = fabs(__n);
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size--;
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} else if (type & PLUS) {
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sign = '+';
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size--;
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} else if (type & SPACE) {
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sign = ' ';
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size--;
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}
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}
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frac = modf(__n,&intr);
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// # flags forces a . and prevents trucation of trailing zero's
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if ( precision > 0 ) {
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//frac = modfl(__n,&intr);
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i = precision-1;
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while ( i >= 0 ) {
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frac*=10.0L;
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frac = modf(frac, &p);
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buf[i] = (int)p + '0';
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i--;
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}
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i = precision;
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size -= precision;
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ro = 0;
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if ( frac > 0.5 ) {
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ro = 1;
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}
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if ( precision >= 1 || type & SPECIAL) {
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buf[i++] = '.';
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size--;
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}
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}
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if ( intr == 0.0 ) {
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buf[i++] = '0';
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size--;
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}
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else {
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while ( intr > 0.0 ) {
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p = intr;
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intr/=10.0L;
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modf(intr, &intr);
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p -= 10.0*intr;
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buf[i++] = (int)p + '0';
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size--;
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}
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}
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j = 0;
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while ( j < i && ro == 1) {
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if ( buf[j] >= '0' && buf[j] <= '8' ) {
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buf[j]++;
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ro = 0;
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}
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else if ( buf[j] == '9' ) {
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buf[j] = '0';
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}
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j++;
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}
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if ( ro == 1 )
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buf[i++] = '1';
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buf[i] = 0;
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size -= precision;
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if (!(type&(ZEROPAD+LEFT)))
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{
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while(size-->0)
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f += ' ';
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}
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if (sign)
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{
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f += sign;
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}
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if (!(type&(ZEROPAD+LEFT)))
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while(size-->0)
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{
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f += ' ';
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}
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if (type & SPECIAL) {
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}
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if (!(type & LEFT))
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while (size-- > 0)
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{
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f += c;
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}
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tmp = buf;
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if ( type & ZEROTRUNC && ((type & SPECIAL) != SPECIAL) )
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{
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j = 0;
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while ( j < i && ( *tmp == '0' || *tmp == '.' ))
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{
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tmp++;
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i--;
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}
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}
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// else
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// while (i < precision--)
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// putc('0', f);
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while (i-- > 0)
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{
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f += tmp[i];
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}
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while (size-- > 0)
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{
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f += ' ';
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}
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}
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return true;
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}
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static bool numberfl(std::string& f, long double __n, char exp_sign, int size, int precision, int type)
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{
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long double exponent = 0.0;
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long double e;
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long ie;
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//int x;
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char *buf, *tmp;
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int i = 0;
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int j = 0;
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//int k = 0;
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long double frac, intr;
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long double p;
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char sign;
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char c;
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char ro = 0;
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int result;
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union
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{
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long double* __n;
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ieee_long_double_t* n;
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} n;
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n.__n = &__n;
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if ( exp_sign == 'g' || exp_sign == 'G' || exp_sign == 'e' || exp_sign == 'E' ) {
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ie = ((unsigned int)n.n->exponent - (unsigned int)0x3fff);
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exponent = ie/3.321928;
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}
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if ( exp_sign == 'g' || exp_sign == 'G' ) {
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type |= ZEROTRUNC;
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if ( exponent < -4 || fabs(exponent) >= precision )
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exp_sign -= 2; // g -> e and G -> E
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}
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if ( exp_sign == 'e' || exp_sign == 'E' ) {
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frac = modfl(exponent,&e);
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if ( frac > 0.5 )
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e++;
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else if ( frac < -0.5 )
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e--;
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result = numberf(f,__n/powl(10.0L,e),'f',size-4, precision, type);
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if (result < 0)
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return false;
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f += exp_sign;
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size--;
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ie = (long)e;
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type = LEFT | PLUS;
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if ( ie < 0 )
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type |= SIGN;
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result = number(f,ie, 10,2, 2,type );
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if (result < 0)
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return false;
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return true;
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}
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if ( exp_sign == 'f' )
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{
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buf = (char*)alloca(4096);
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if (type & LEFT)
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{
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type &= ~ZEROPAD;
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}
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c = (type & ZEROPAD) ? '0' : ' ';
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sign = 0;
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if (type & SIGN)
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{
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if (__n < 0)
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{
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sign = '-';
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__n = fabs(__n);
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size--;
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} else if (type & PLUS)
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{
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sign = '+';
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size--;
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} else if (type & SPACE)
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{
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sign = ' ';
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size--;
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}
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}
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frac = modfl(__n,&intr);
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// # flags forces a . and prevents trucation of trailing zero's
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if ( precision > 0 )
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{
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//frac = modfl(__n,&intr);
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i = precision-1;
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while ( i >= 0 )
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{
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frac*=10.0L;
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frac = modfl((long double)frac, &p);
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buf[i] = (int)p + '0';
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i--;
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}
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i = precision;
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size -= precision;
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ro = 0;
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if ( frac > 0.5 )
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{
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ro = 1;
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}
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if ( precision >= 1 || type & SPECIAL)
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{
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buf[i++] = '.';
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size--;
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}
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}
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if ( intr == 0.0 )
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{
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buf[i++] = '0';
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size--;
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}
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else
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{
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while ( intr > 0.0 )
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{
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p=intr;
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intr/=10.0L;
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modfl(intr, &intr);
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p -= 10.0L*intr;
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buf[i++] = (int)p + '0';
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size--;
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}
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}
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j = 0;
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while ( j < i && ro == 1) {
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if ( buf[j] >= '0' && buf[j] <= '8' )
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{
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buf[j]++;
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ro = 0;
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}
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else if ( buf[j] == '9' )
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{
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buf[j] = '0';
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}
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j++;
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}
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if ( ro == 1 )
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buf[i++] = '1';
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buf[i] = 0;
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size -= precision;
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if (!(type&(ZEROPAD+LEFT)))
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{
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while(size-->0)
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f += ' ';
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}
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if (sign)
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{
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f += sign;
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}
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if (!(type&(ZEROPAD+LEFT)))
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{
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while(size-->0)
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f += ' ';
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}
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if (type & SPECIAL) {
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}
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if (!(type & LEFT))
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while (size-- > 0)
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{
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f += c;
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}
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tmp = buf;
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if ( type & ZEROTRUNC && ((type & SPECIAL) != SPECIAL) )
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{
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j = 0;
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while ( j < i && ( *tmp == '0' || *tmp == '.' ))
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{
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tmp++;
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i--;
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}
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}
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// else
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// while (i < precision--)
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// putc( '0', f);
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while (i-- > 0)
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{
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f += tmp[i];
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}
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while (size-- > 0)
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{
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f += ' ';
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}
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}
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return true;
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}
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static int string(std::string& f, const char* s, int len, int field_width, int precision, int flags)
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{
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int i, done = 0;
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if (s == NULL)
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{
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s = "<NULL>";
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len = 6;
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}
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else
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{
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if (len == -1)
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{
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len = 0;
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while ((unsigned int)len < (unsigned int)precision && s[len])
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len++;
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}
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else
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{
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if ((unsigned int)len > (unsigned int)precision)
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len = precision;
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}
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}
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if (!(flags & LEFT))
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while (len < field_width--)
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{
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f += ' ';
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done++;
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}
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for (i = 0; i < len; ++i)
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{
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f += *s++;
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done++;
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}
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while (len < field_width--)
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{
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f += ' ';
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done++;
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}
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return done;
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}
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static int stringw(std::string& f, const wchar_t* sw, int len, int field_width, int precision, int flags)
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{
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int i, done = 0;
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if (sw == NULL)
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{
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sw = L"<NULL>";
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len = 6;
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}
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else
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{
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if (len == -1)
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{
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len = 0;
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while ((unsigned int)len < (unsigned int)precision && sw[len])
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len++;
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}
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else
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{
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if ((unsigned int)len > (unsigned int)precision)
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len = precision;
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}
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}
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if (!(flags & LEFT))
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while (len < field_width--)
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{
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f += ' ';
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done++;
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}
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for (i = 0; i < len; ++i)
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{
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#define MY_MB_CUR_MAX 1
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|
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 unsigned short* 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 = va_arg(args, wchar_t *);
|
|
result = stringw(f, sw, -1, field_width, precision, flags);
|
|
} else {
|
|
/* print ascii string */
|
|
s = va_arg(args, char *);
|
|
result = string(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 = string(f, s, -1, field_width, precision, flags);
|
|
} else {
|
|
/* print unicode string */
|
|
sw = 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 = string(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;
|
|
}
|