_region_init
_region_init(&r, __DECONST(void *, key), strlen(key));
_region_init(&r, tmp, strlen(key));
_region_init(&r, p, 1);
_region_init(&r, p, 2);
_region_init(&r, p, 4);
_region_init(&r, p, strlen(p) + 1);
_region_init(&r, __DECONST(void *, key), strlen(key));
_region_init(key, cl->cl_key, cl->cl_keylen);
_region_init(key, __DECONST(void *, p), (size_t)(q - p));
_region_init(data, len ? __DECONST(void *, p) : NULL, len);
_region_init(data, __DECONST(void *, p), len);
_region_init(r, ptr, size);
_region_init(r, head, _memstream_remainder(ms));
_region_init(r, head, sz);
_region_init(r, NULL, 0);
_region_init(r, head, (size_t)st.st_size);
_region_init(r, NULL, 0);
_region_init(&subr, ptr, size);
_region_init(r, ptr, size);
_region_init(&r, __DECONST(void *, var), lenvar);
_region_init(&r, __DECONST(void *, var), lenvar);
_region_init(&r, __DECONST(void *, var), lenvar);
_region_init(r, ptr, ofs * 4);
_region_init(r, ptr, _CITRUS_MAPPER_STD_ROWCOL_EXT_ILSEQ_SIZE);
_region_init(&data, table, table_size*dst_unit_bits/8);
_region_init(&data, serialized, size);
_region_init(&data, serialized, size);