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/* ISC license. */
#include <errno.h>
#include <skalibs/bytestr.h>
#include <skalibs/stralloc.h>
#include <skalibs/uint.h>
#include <execline/execline.h>
int el_popenv (stralloc *sa, char const *const *envp, unsigned int envlen, char const *const *list, unsigned int listlen)
{
unsigned int i = 0, salen = sa->len, count = 0 ;
for (; i < envlen ; i++)
{
unsigned int equal, colon, n ;
unsigned int j = 0 ;
for (; j < listlen ; j++) if (str_start(envp[i], list[j])) break ;
if (j == listlen) goto copyit ;
j = str_len(list[j]) ;
colon = j + str_chr(envp[i] + j, ':') ;
equal = j + str_chr(envp[i] + j, '=') ;
if (!envp[i][equal]) goto badenv ;
if (colon >= equal) { count++ ; continue ; }
if (colon + 1 + uint_scan(envp[i] + colon + 1, &n) != equal) goto copyit ;
if (!n) goto copyit ;
if (!stralloc_catb(sa, envp[i], colon)) goto err ;
if (n > 1)
{
char fmt[UINT_FMT+1] = ":" ;
n = 1 + uint_fmt(fmt+1, n-1) ;
if (!stralloc_catb(sa, fmt, n)) goto err ;
}
if (!stralloc_catb(sa, envp[i] + equal, str_len(envp[i] + equal) + 1)) goto err ;
continue ;
copyit:
if (!stralloc_catb(sa, envp[i], str_len(envp[i]) + 1)) goto err ;
}
return (int)count ;
badenv :
errno = EINVAL ;
err:
sa->len = salen ;
return -1 ;
}
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