Z_BLOCK
flush > Z_BLOCK || flush < 0) {
} else if (flush != Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */
if (flush == Z_BLOCK || flush == Z_TREES) goto inf_leave;
flush > Z_BLOCK || flush < 0) {
} else if (flush != Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */
if (flush == Z_BLOCK || flush == Z_TREES) goto inf_leave;
flush > Z_BLOCK || flush < 0) {
} else if (flush != Z_BLOCK) { /* FULL_FLUSH or SYNC_FLUSH */
if (flush == Z_BLOCK || flush == Z_TREES) goto inf_leave;