gzgets
gzgets(file, (char*)uncompr, (int)uncomprLen);
ZEXTERN char * ZEXPORT gzgets(gzFile file, char *buf, int len);
if (((ptr = gzgets(in, buffer, (int)length)) != NULL) && (*ptr == '\0'))
ZEXTERN char * ZEXPORT gzgets(gzFile, char *, int);