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Support floating-point formatting

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This is just a quick and dirty way to get %f formatting to work for
some games. It works.

Change-Id: I75585e0c6a0f9d6db41a87b71ca405b067d8b85d
This commit is contained in:
Franklin Wei 2017-09-29 16:54:31 -04:00
parent a8423321b8
commit 01c6dcf6c7
1 changed files with 18 additions and 0 deletions
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18
firmware/common/vuprintf.c
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@ -524,6 +524,18 @@ static inline const char * format_p(const void *p,
} }
#endif /* FMT_RADIX_p */ #endif /* FMT_RADIX_p */
#undef ABS
#define ABS(x) ((x)<0?-(x):(x))
static const char * format_f(double f,
struct fmt_buf *fmt_buf,
int radixchar,
bool *numericp)
{
fmt_buf->length = snprintf(fmt_buf->buf, 24, "%d.%06d", (int)f, ABS((int)((f - (int)f)*1e6)));
return fmt_buf->buf;
}
/* parse fixed width or precision field */ /* parse fixed width or precision field */
static const char * parse_number_spec(const char *fmt, static const char * parse_number_spec(const char *fmt,
int ch, int ch,
@ -741,6 +753,12 @@ int vuprintf(vuprintf_push_cb push, /* call 'push()' for each output letter */
break; break;
#endif #endif
case 'f':
case 'g':
buf = format_f(va_arg(ap, double), &fmt_buf, ch,
&numeric);
break;
/** signed integer **/ /** signed integer **/
case 'd': case 'd':
case 'i': case 'i':