Usermode/libc - Messing about with %f

diff --git a/Usermode/Libraries/libc.so_src/printf.c b/Usermode/Libraries/libc.so_src/printf.c
index 9f39cc6..bf07de4 100644 (file)
--- a/Usermode/Libraries/libc.so_src/printf.c
+++ b/Usermode/Libraries/libc.so_src/printf.c
@@ -581,12 +581,111 @@ size_t _printf_ftoa_hex(printf_putch_t putch_cb, void *putch_h, long double num,
        return ret;
 }
 
+#if 0
+size_t _printf_itoa_fixed(printf_putch_t putch_cb, void *putch_h, uint64_t num, size_t Base)
+{
+       uint64_t        den;
+       size_t  ret = 0;
+
+       den = 1ULL << (64-1);
+       
+       while( den )
+       {
+               putch_cb(putch_h, cDIGITS[num / den]);
+               ret ++;
+               num %= den;
+               den /= Base;
+       }
+
+       return ret;
+}
+
+size_t _printf_ftoa_dec(printf_putch_t putch_cb, void *putch_h, long double num, enum eFPN Notation, int Precision, int bForcePoint, int bForceSign, int bCapitals)
+{
+       size_t  ret = 0;
+        int    i;
+
+       #define _putch(_ch) do{\
+               putch_cb(putch_h, bCapitals ? toupper(_ch) : _ch), ret++;\
+       }while(0)
+       
+       uint64_t        significand;
+        int16_t        exponent;
+        int    signisneg;
+        int    rv = expand_double(num, &significand, &exponent, &signisneg);
+       switch(rv)
+       {
+       // 0: No errors, nothing special
+       case 0:
+               break;
+       // 1: Subnormals
+       case 1:
+               // TODO: Subnormal = 0?
+               break;
+       // 2: Infinity
+       case 2:
+               _putch('i');
+               _putch('n');
+               _putch('f');
+               return 3;
+       case 3:
+               _putch('N');
+               _putch('a');
+               _putch('N');
+               return 3;
+       }
+
+       uint64_t        whole, part;
+        int    pre_zeros, post_zeros;
+
+       #define XXX     0
+       if( Notation == FPN_SCI )
+       {
+       }
+       else if( exponent < 0 )
+       {
+               whole = 0;
+               part = XXX;
+               pre_zeros = 0;
+               post_zeros = XXX;
+       }
+       else if( exponent >= 64 )
+       {
+               part = 0;
+               whole = XXX;
+               pre_zeros = XXX;
+               post_zeros = 0;
+       }
+       else
+       {
+               // Split into fixed point
+               whole = (1 << exponent) | (significand >> (64-exponent));
+               part = significand << exponent;
+               pre_zeros = 0;
+               post_zeros = 0;
+       }
+
+       
+       // Whole portion
+       ret += _printf_itoa(putch_cb, putch_h, whole, 10, FALSE, FALSE, '\0', 0, 0, '\0', FALSE);
+       for(i = pre_zeros; i --; )      _putch('0');
+       // TODO: Conditional point
+       _putch('-');
+       for(i = post_zeros; i--; )      _putch('0');
+       ret += _printf_itoa_fixed(putch_cb, putch_h, part, 10);
+       
+       #undef _putch
+
+       return 0;
+}
+#endif
+
 size_t _printf_ftoa(printf_putch_t putch_cb, void *putch_h, long double num, size_t Base, enum eFPN Notation, int Precision, int bForcePoint, int bForceSign, int bCapitals)
 {
        uint64_t        significand;
        int16_t exponent;
         int    signisneg;
-        int    rv;
+        int    rv, i;
        size_t  ret = 0;
 
        #define _putch(_ch) do{\
@@ -656,7 +755,7 @@ size_t _printf_ftoa(printf_putch_t putch_cb, void *putch_h, long double num, siz
        }
 
        double precision_max = 1;
-       for(int i = Precision; i--; )
+       for(i = Precision; i--; )
                precision_max /= Base;
 
        // Determine scientific's exponent and starting denominator
@@ -716,7 +815,7 @@ size_t _printf_ftoa(printf_putch_t putch_cb, void *putch_h, long double num, siz
        if( Precision > 0 || bForcePoint )
                _putch('.');
        // Decimal section
-       for(int i = Precision; i--; )
+       for(i = Precision; i--; )
        {
                num = _longdiv(num, den, &value);
                _putch(cDIGITS[value]);