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/* ISC license. */
#include <errno.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/uint32.h>
#include <skalibs/stralloc.h>
#include <skalibs/mininetstring.h>
int mininetstring_read (int fd, stralloc *sa, uint32 *w)
{
if (!*w)
{
char pack[2] ;
switch (fd_read(fd, pack, 2))
{
case -1 : return -1 ;
case 0 : return 0 ;
case 1 : *w = ((uint32)pack[0] << 8) | (1U << 31) ; break ;
case 2 : *w = ((uint32)pack[0] << 8) | (uint32)pack[1] | (1U << 30) ; break ;
default : return (errno = EDOM, -1) ;
}
}
if (*w & (1U << 31))
{
char c ;
switch (fd_read(fd, &c, 1))
{
case -1 : return -1 ;
case 0 : return (errno = EPIPE, -1) ;
case 1 : *w |= (uint32)c | (1U << 30) ; *w &= ~(1U << 31) ; break ;
default : return (errno = EDOM, -1) ;
}
}
if (*w & (1U << 30))
{
if (!stralloc_readyplus(sa, *w & ~(1U << 30))) return -1 ;
*w &= ~(1U << 30) ;
}
{
register unsigned int r = allread(fd, sa->s + sa->len, *w) ;
sa->len += r ; *w -= r ;
}
return *w ? -1 : 1 ;
}
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