On 23/03/2021 18:42, Joel Sherrill wrote:
> > + mask = 1 << (num_bits - 1);
> > +
> > + while ( mask != 0 ) {
> > + _IO_Printf( _CPU_Put_char, &sctx, "%d", (value & mask ? 1 : 0) );
> > + mask >>= 1;
> > + }
The _IO_Vprintf() is a port from the FreeBSD kvprintf(). I removed the
support for this:
/*
* Scaled down version of printf(3).
*
* Two additional formats:
*
* The format %b is supported to decode error registers.
* Its usage is:
*
* printf("reg=%b\n", regval, "<base><arg>*");
*
* where <base> is the output base expressed as a control character, e.g.
* \10 gives octal; \20 gives hex. Each arg is a sequence of characters,
* the first of which gives the bit number to be inspected (origin 1), and
* the next characters (up to a control character, i.e. a character <= 32),
* give the name of the register. Thus:
*
* kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE");
We could also a a special %B specifier to produce 0b0100 stuff.
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