113   int result;  in funreader()  local
116   if ((result = c->readfn (c->cookie, buf, n)) < 0 && errno)  in funreader()
118   return result;  in funreader()
127   int result;  in funwriter()  local
130   if ((result = c->writefn (c->cookie, buf, n)) < 0 && errno)  in funwriter()
132   return result;  in funwriter()
143   fpos_t result;  in funseeker()  local
145   if ((result = c->seekfn (c->cookie, (fpos_t) off, whence)) < 0 && errno)  in funseeker()
148   _fpos64_t result;  in funseeker()  local
150   if ((result = c->seekfn (c->cookie, (_fpos64_t) off, whence)) < 0 && errno)  in funseeker()
152   else if ((_fpos_t)result != result)  in funseeker()
155       result = -1;  in funseeker()
158   return result;  in funseeker()
168   _fpos64_t result;  in funseeker64()  local
171   if ((result = c->seekfn (c->cookie, off, whence)) < 0 && errno)  in funseeker64()
173   return result;  in funseeker64()
181   int result = 0;  in funcloser()  local
186       if ((result = c->closefn (c->cookie)) < 0 && errno)  in funcloser()
190   return result;  in funcloser()