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/* ISC license. */
#include <errno.h>
#include <skalibs/uint16.h>
#include <skalibs/uint32.h>
#include <skalibs/allreadwrite.h>
#include <skalibs/mininetstring.h>
int mininetstring_write (int fd, char const *s, uint16 len, uint32 *w)
{
if (!*w)
{
char pack[2] ;
uint16_pack_big(pack, len) ;
switch (fd_write(fd, pack, 2))
{
case -1 : return -1 ;
case 0 : return (errno = EAGAIN, -1) ;
case 1 : *w = (1U << 31) ; break ;
case 2 : *w = len ; break ;
default : return (errno = EDOM, -1) ;
}
}
if (*w & (1U << 31))
{
unsigned char c = len & 0xFFU ;
switch (fd_write(fd, (char const *)&c, 1))
{
case -1 : return -1 ;
case 0 : return (errno = EAGAIN, -1) ;
case 1 : *w = len ; break ;
default : return (errno = EDOM, -1) ;
}
}
*w -= allwrite(fd, s + len - *w, *w) ;
return *w ? -1 : 1 ;
}
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