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/* ISC license. */
#include <sys/types.h>
#include <skalibs/bytestr.h>
#include <skalibs/netstring.h>
#include <skalibs/skamisc.h>
#include <skalibs/stralloc.h>
#include <execline/execline.h>
static void el_crunch (stralloc *sa, size_t base, char const *delim)
{
size_t i = base, j = base ;
int crunching = 0 ;
for (; i < sa->len ; i++)
{
if (!crunching) sa->s[j++] = sa->s[i] ;
if (delim[str_chr(delim, sa->s[i])]) crunching = 1 ;
else if (crunching)
{
i-- ;
crunching = 0 ;
}
}
sa->len = j ;
}
static int el_split (stralloc *sa, size_t base, eltransforminfo_t const *si, int chomped)
{
int n = 0 ;
size_t i = base ;
for (; i < sa->len ; i++)
if (si->delim[str_chr(si->delim, sa->s[i])])
{
sa->s[i] = 0 ;
n++ ;
base = i+1 ;
}
if (sa->len && sa->s[sa->len - 1])
{
if (si->chomp && !chomped) sa->len = base ;
else if (!stralloc_0(sa)) return -1 ;
else n++ ;
}
return n ;
}
static int el_splitnetstring (stralloc *sa, size_t base)
{
size_t tmpbase = satmp.len, i = base ;
int n = 0 ;
while (i < sa->len)
{
ssize_t r = netstring_decode(&satmp, sa->s + i, sa->len - i) ;
if (r < 0) goto err ;
if (!stralloc_0(&satmp)) goto err ;
i += r ; n++ ;
}
sa->len = base ;
if (!stralloc_catb(sa, satmp.s + tmpbase, satmp.len - tmpbase))
{
sa->len = i ;
goto err ;
}
satmp.len = tmpbase ;
return n ;
err:
satmp.len = tmpbase ;
return -1 ;
}
int el_transform (stralloc *sa, size_t i, eltransforminfo_t const *si)
{
int chomped = 0 ;
if (si->crunch && *si->delim) el_crunch(sa, i, si->delim) ;
if (si->chomp && (sa->len > i)
&& si->delim[str_chr(si->delim, sa->s[sa->len-1])])
{
sa->len-- ;
chomped = 1 ;
}
return si->split ? *si->delim ? el_split(sa, i, si, chomped) : el_splitnetstring(sa, i) :
stralloc_0(sa) ? 1 : -1 ;
}
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