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added simple floating point print facility

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This commit is contained in:
Markus Fröschle
2013-10-26 07:58:28 +00:00
parent 5251ea49a3
commit 23908bd5af
1 changed files with 39 additions and 0 deletions
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39
BaS_gcc/sources/bas_printf.c
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@@ -77,6 +77,7 @@ static void doprnt(void (*addchar)(int), const char *sfmt, va_list ap)
char buf[128];
char *bp;
const char *f;
float flt;
long l;
unsigned long u;
int i;
@@ -203,6 +204,44 @@ static void doprnt(void (*addchar)(int), const char *sfmt, va_list ap)
(*addchar)((int) (' ' | attributes));
break;
case 'f':
/* this is actually more than stupid, but does work for now */
flt = (float) (va_arg(ap, double)); /* beware: va_arg() extends float to double! */
if (flt < 0)
{
sign = 1;
flt = -flt;
}
{
int quotient, remainder;
quotient = (int) flt;
remainder = (flt - quotient) * 10E5;
for (i = 0; i < 6; i++)
{
*bp++ = (char) (remainder % 10) + '0';
remainder /= 10;
}
*bp++ = '.';
do
{
*bp++ = (char) (quotient % 10) + '0';
} while ((quotient /= 10) > 0);
if (sign)
*bp++ = '-';
f_width = f_width - (int) (bp - buf);
if (!flush_left)
while (f_width-- > 0)
(*addchar)((int) (pad | attributes));
for (bp--; bp >= buf; bp--)
(*addchar)((int) (((unsigned char) *bp) | attributes));
if (flush_left)
while (f_width-- > 0)
(*addchar)((int) (' ' | attributes));
}
break;
case 'p':
do_long = 1;
hash = 1;