Introduced nxt_length() macro.

28 files changed, 101 insertions, 99 deletions

diff --git a/src/go/unit/nxt_go_port_memory.c b/src/go/unit/nxt_go_port_memory.c
index 89530fe8..85b46bed 100644
--- a/src/go/unit/nxt_go_port_memory.c
+++ b/src/go/unit/nxt_go_port_memory.c
@@ -49,7 +49,7 @@ nxt_go_new_port_mmap(nxt_go_process_t *process, nxt_port_id_t id,
         return NULL;
     }
 
-    name_len = snprintf(name, sizeof(name) - 1,
+    name_len = snprintf(name, nxt_length(name),
                         NXT_SHM_PREFIX "unit.go.%p", name);
 
 #if (NXT_HAVE_MEMFD_CREATE)
diff --git a/src/nxt_app_log.c b/src/nxt_app_log.c
index 9bd85458..16649ecf 100644
--- a/src/nxt_app_log.c
+++ b/src/nxt_app_log.c
@@ -95,7 +95,7 @@ static nxt_time_string_t  nxt_log_error_time_cache = {
     (nxt_atomic_uint_t) -1,
     nxt_log_error_time,
     "%4d/%02d/%02d %02d:%02d:%02d ",
-    sizeof("1970/09/28 12:00:00 ") - 1,
+    nxt_length("1970/09/28 12:00:00 "),
     NXT_THREAD_TIME_LOCAL,
     NXT_THREAD_TIME_MSEC,
 };
@@ -115,7 +115,7 @@ static nxt_time_string_t  nxt_log_debug_time_cache = {
     (nxt_atomic_uint_t) -1,
     nxt_log_debug_time,
     "%4d/%02d/%02d %02d:%02d:%02d.%03d ",
-    sizeof("1970/09/28 12:00:00.000 ") - 1,
+    nxt_length("1970/09/28 12:00:00.000 "),
     NXT_THREAD_TIME_LOCAL,
     NXT_THREAD_TIME_MSEC,
 };
diff --git a/src/nxt_application.c b/src/nxt_application.c
index 186614a0..8b5779c3 100644
--- a/src/nxt_application.c
+++ b/src/nxt_application.c
@@ -138,7 +138,7 @@ nxt_discovery_modules(nxt_task_t *task, const char *path)
         }
     }
 
-    size = sizeof("[]") - 1;
+    size = nxt_length("[]");
     module = modules->elts;
     n = modules->nelts;
 
@@ -146,9 +146,9 @@ nxt_discovery_modules(nxt_task_t *task, const char *path)
         nxt_debug(task, "module: %d %V %V",
                   module[i].type, &module[i].version, &module[i].file);
 
-        size += sizeof("{\"type\": ,") - 1;
-        size += sizeof(" \"version\": \"\",") - 1;
-        size += sizeof(" \"file\": \"\"},") - 1;
+        size += nxt_length("{\"type\": ,");
+        size += nxt_length(" \"version\": \"\",");
+        size += nxt_length(" \"file\": \"\"},");
 
         size += NXT_INT_T_LEN
                 + module[i].version.length
diff --git a/src/nxt_application.h b/src/nxt_application.h
index 0ddaeb7c..b5ce3e63 100644
--- a/src/nxt_application.h
+++ b/src/nxt_application.h
@@ -184,7 +184,7 @@ nxt_app_msg_write_nvp_(nxt_task_t *task, nxt_app_wmsg_t *msg,
 
 
 #define nxt_app_msg_write_const(task, msg, c)                                 \
-    nxt_app_msg_write((task), (msg), (u_char *)(c), sizeof(c) - 1)
+    nxt_app_msg_write((task), (msg), (u_char *) (c), nxt_length(c))
 
 #define nxt_app_msg_write_str(task, msg, str)                                 \
     nxt_app_msg_write((task), (msg), (str)->start, (str)->length)
@@ -193,7 +193,7 @@ nxt_app_msg_write_nvp_(nxt_task_t *task, nxt_app_wmsg_t *msg,
     nxt_app_msg_write((task), (msg), (c), nxt_strlen(c))
 
 #define nxt_app_msg_write_nvp(task, msg, n, v)                                \
-    nxt_app_msg_write_nvp_((task), (msg), (u_char *)(n), sizeof(n) - 1,       \
+    nxt_app_msg_write_nvp_((task), (msg), (u_char *) (n), nxt_length(n),      \
                            (v)->start, (v)->length)
 
 nxt_inline nxt_int_t nxt_app_msg_write_size(nxt_task_t *task,
diff --git a/src/nxt_clang.h b/src/nxt_clang.h
index a9b8cd9e..a10de08a 100644
--- a/src/nxt_clang.h
+++ b/src/nxt_clang.h
@@ -262,4 +262,8 @@ nxt_trunc_ptr(p, a)                                                           \
     (u_char *) ((uintptr_t) (p) & ~((uintptr_t) (a) - 1))
 
 
+#define nxt_length(s)                                                         \
+    (sizeof(s) - 1)
+
+
 #endif /* _NXT_CLANG_H_INCLUDED_ */
diff --git a/src/nxt_conf.c b/src/nxt_conf.c
index b3aabcba..34515c1f 100644
--- a/src/nxt_conf.c
+++ b/src/nxt_conf.c
@@ -1878,10 +1878,10 @@ nxt_conf_json_length(nxt_conf_value_t *value, nxt_conf_json_pretty_t *pretty)
     switch (value->type) {
 
     case NXT_CONF_VALUE_NULL:
-        return sizeof("null") - 1;
+        return nxt_length("null");
 
     case NXT_CONF_VALUE_BOOLEAN:
-        return value->u.boolean ? sizeof("true") - 1 : sizeof("false") - 1;
+        return value->u.boolean ? nxt_length("true") : nxt_length("false");
 
     case NXT_CONF_VALUE_INTEGER:
         return nxt_conf_json_integer_length(value);
@@ -1952,11 +1952,11 @@ nxt_conf_json_integer_length(nxt_conf_value_t *value)
     num = llabs(value->u.integer);
 
     if (num <= 9999) {
-        return sizeof("-9999") - 1;
+        return nxt_length("-9999");
     }
 
     if (num <= 99999999999LL) {
-        return sizeof("-99999999999") - 1;
+        return nxt_length("-99999999999");
     }
 
     return NXT_INT64_T_LEN;
diff --git a/src/nxt_conf_validation.c b/src/nxt_conf_validation.c
index 4fb4720f..f21507d4 100644
--- a/src/nxt_conf_validation.c
+++ b/src/nxt_conf_validation.c
@@ -311,7 +311,7 @@ nxt_conf_vldt_type(nxt_conf_validation_t *vldt, nxt_str_t *name,
     nxt_str_t   expected;
     nxt_bool_t  serial;
     nxt_uint_t  value_type, n, t;
-    u_char      buf[sizeof(NXT_CONF_VLDT_ANY_TYPE) - 1];
+    u_char      buf[nxt_length(NXT_CONF_VLDT_ANY_TYPE)];
 
     static nxt_str_t  type_name[] = {
         nxt_string("a null"),
diff --git a/src/nxt_controller.c b/src/nxt_controller.c
index 8c098efc..099432f1 100644
--- a/src/nxt_controller.c
+++ b/src/nxt_controller.c
@@ -1167,7 +1167,7 @@ nxt_controller_response(nxt_task_t *task, nxt_controller_request_t *req,
         (nxt_atomic_uint_t) -1,
         nxt_controller_date,
         "%s, %02d %s %4d %02d:%02d:%02d GMT",
-        sizeof("Wed, 31 Dec 1986 16:40:00 GMT") - 1,
+        nxt_length("Wed, 31 Dec 1986 16:40:00 GMT"),
         NXT_THREAD_TIME_GMT,
         NXT_THREAD_TIME_SEC,
     };
@@ -1264,13 +1264,13 @@ nxt_controller_response(nxt_task_t *task, nxt_controller_request_t *req,
 
     body->mem.free = nxt_cpymem(body->mem.free, "\r\n", 2);
 
-    size = sizeof("HTTP/1.1 " "\r\n") - 1 + status_line.length
-           + sizeof("Server: " NXT_SERVER "\r\n") - 1
-           + sizeof("Date: Wed, 31 Dec 1986 16:40:00 GMT\r\n") - 1
-           + sizeof("Content-Type: application/json\r\n") - 1
-           + sizeof("Content-Length: " "\r\n") - 1 + NXT_SIZE_T_LEN
-           + sizeof("Connection: close\r\n") - 1
-           + sizeof("\r\n") - 1;
+    size = nxt_length("HTTP/1.1 " "\r\n") + status_line.length
+           + nxt_length("Server: " NXT_SERVER "\r\n")
+           + nxt_length("Date: Wed, 31 Dec 1986 16:40:00 GMT\r\n")
+           + nxt_length("Content-Type: application/json\r\n")
+           + nxt_length("Content-Length: " "\r\n") + NXT_SIZE_T_LEN
+           + nxt_length("Connection: close\r\n")
+           + nxt_length("\r\n");
 
     b = nxt_buf_mem_alloc(c->mem_pool, size, 0);
     if (nxt_slow_path(b == NULL)) {
diff --git a/src/nxt_errno.c b/src/nxt_errno.c
index 29f270e0..869a970f 100644
--- a/src/nxt_errno.c
+++ b/src/nxt_errno.c
@@ -41,7 +41,7 @@ nxt_strerror_start(void)
     nxt_uint_t  err, invalid;
 
     /* The last entry. */
-    size = sizeof("Unknown error") - 1;
+    size = nxt_length("Unknown error");
 
     /*
      * Linux has holes for error codes 41 and 58, so the loop
diff --git a/src/nxt_h1proto.c b/src/nxt_h1proto.c
index c0be75e2..52a52f79 100644
--- a/src/nxt_h1proto.c
+++ b/src/nxt_h1proto.c
@@ -707,7 +707,7 @@ static const nxt_str_t  nxt_http_server_error[] = {
 };
 
 
-#define UNKNOWN_STATUS_LENGTH  (sizeof("HTTP/1.1 65536\r\n") - 1)
+#define UNKNOWN_STATUS_LENGTH  nxt_length("HTTP/1.1 65536\r\n")
 
 static void
 nxt_h1p_request_header_send(nxt_task_t *task, nxt_http_request_t *r)
@@ -766,16 +766,16 @@ nxt_h1p_request_header_send(nxt_task_t *task, nxt_http_request_t *r)
 
     size = status->length;
     /* Trailing CRLF at the end of header. */
-    size += sizeof("\r\n") - 1;
+    size += nxt_length("\r\n");
 
     http11 = (h1p->parser.version.s.minor != '0');
 
     if (r->resp.content_length == NULL || r->resp.content_length->skip) {
         if (http11) {
             h1p->chunked = 1;
-            size += sizeof(chunked) - 1;
+            size += nxt_length(chunked);
             /* Trailing CRLF will be added by the first chunk header. */
-            size -= sizeof("\r\n") - 1;
+            size -= nxt_length("\r\n");
 
         } else {
             h1p->keepalive = 0;
@@ -793,7 +793,7 @@ nxt_h1p_request_header_send(nxt_task_t *task, nxt_http_request_t *r)
 
         if (!field->skip) {
             size += field->name_length + field->value_length;
-            size += sizeof(": \r\n") - 1;
+            size += nxt_length(": \r\n");
         }
 
     } nxt_list_loop;
@@ -824,7 +824,7 @@ nxt_h1p_request_header_send(nxt_task_t *task, nxt_http_request_t *r)
     }
 
     if (h1p->chunked) {
-        p = nxt_cpymem(p, chunked, sizeof(chunked) - 1);
+        p = nxt_cpymem(p, chunked, nxt_length(chunked));
         /* Trailing CRLF will be added by the first chunk header. */
 
     } else {
@@ -897,7 +897,7 @@ nxt_h1p_chunk_create(nxt_task_t *task, nxt_http_request_t *r, nxt_buf_t *out)
     nxt_off_t          size;
     nxt_buf_t          *b, **prev, *header, *tail;
 
-    const size_t       chunk_size = 2 * (sizeof("\r\n") - 1) + NXT_OFF_T_HEXLEN;
+    const size_t       chunk_size = 2 * nxt_length("\r\n") + NXT_OFF_T_HEXLEN;
     static const char  tail_chunk[] = "\r\n0\r\n\r\n";
 
     size = 0;
@@ -918,7 +918,7 @@ nxt_h1p_chunk_create(nxt_task_t *task, nxt_http_request_t *r, nxt_buf_t *out)
              * memcpy may be inlined with just single 8 byte move operation.
              */
             nxt_memcpy(tail->mem.free, tail_chunk, sizeof(tail_chunk));
-            tail->mem.free += sizeof(tail_chunk) - 1;
+            tail->mem.free += nxt_length(tail_chunk);
 
             break;
         }
diff --git a/src/nxt_http.h b/src/nxt_http.h
index 57c624d7..c6756ec5 100644
--- a/src/nxt_http.h
+++ b/src/nxt_http.h
@@ -76,15 +76,15 @@ typedef union {
 
 #define nxt_http_field_name_set(_field, _name)                                \
     do {                                                                      \
-         (_field)->name_length = sizeof(_name) - 1;                           \
+         (_field)->name_length = nxt_length(_name);                           \
          (_field)->name = (u_char *) _name;                                   \
     } while (0)
 
 
 #define nxt_http_field_set(_field, _name, _value)                             \
     do {                                                                      \
-         (_field)->name_length = sizeof(_name) - 1;                           \
-         (_field)->value_length = sizeof(_value) - 1;                         \
+         (_field)->name_length = nxt_length(_name);                           \
+         (_field)->value_length = nxt_length(_value);                         \
          (_field)->name = (u_char *) _name;                                   \
          (_field)->value = (u_char *) _value;                                 \
     } while (0)
diff --git a/src/nxt_http_error.c b/src/nxt_http_error.c
index 8b10f508..71f790e0 100644
--- a/src/nxt_http_error.c
+++ b/src/nxt_http_error.c
@@ -49,7 +49,7 @@ nxt_http_request_error(nxt_task_t *task, nxt_http_request_t *r,
     nxt_http_field_set(content_type, "Content-Type", "text/html");
 
     r->resp.content_length = NULL;
-    r->resp.content_length_n = sizeof(error) - 1;
+    r->resp.content_length_n = nxt_length(error);
 
     r->state = &nxt_http_request_send_error_body_state;
 
@@ -87,7 +87,7 @@ nxt_http_request_send_error_body(nxt_task_t *task, void *obj, void *data)
 
     out->mem.start = (u_char *) error;
     out->mem.pos = out->mem.start;
-    out->mem.free = out->mem.start + sizeof(error) - 1;
+    out->mem.free = out->mem.start + nxt_length(error);
     out->mem.end = out->mem.free;
 
     out->next = nxt_http_buf_last(r);
diff --git a/src/nxt_http_request.c b/src/nxt_http_request.c
index d1a30f0e..2d6ccb42 100644
--- a/src/nxt_http_request.c
+++ b/src/nxt_http_request.c
@@ -282,7 +282,7 @@ nxt_http_request_header_send(nxt_task_t *task, nxt_http_request_t *r)
         (nxt_atomic_uint_t) -1,
         nxt_http_date,
         "%s, %02d %s %4d %02d:%02d:%02d GMT",
-        sizeof("Wed, 31 Dec 1986 16:40:00 GMT") - 1,
+        nxt_length("Wed, 31 Dec 1986 16:40:00 GMT"),
         NXT_THREAD_TIME_GMT,
         NXT_THREAD_TIME_SEC,
     };
diff --git a/src/nxt_listen_socket.c b/src/nxt_listen_socket.c
index a99bc630..0d283c37 100644
--- a/src/nxt_listen_socket.c
+++ b/src/nxt_listen_socket.c
@@ -200,7 +200,7 @@ nxt_listen_socket_remote_size(nxt_listen_socket_t *ls)
          * comment in nxt_socket.h.
          */
         ls->socklen = offsetof(struct sockaddr_un, sun_path) + 1;
-        ls->address_length = sizeof("unix:") - 1;
+        ls->address_length = nxt_length("unix:");
 
         break;
 
@@ -239,7 +239,7 @@ nxt_listen_socket_pool_min_size(nxt_listen_socket_t *ls)
         ls->address_length = NXT_INET6_ADDR_STR_LEN;
 
         size = offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in6)
-               + NXT_INET6_ADDR_STR_LEN + (sizeof(":65535") - 1);
+               + NXT_INET6_ADDR_STR_LEN + nxt_length(":65535");
 
         if (IN6_IS_ADDR_UNSPECIFIED(&ls->sockaddr->u.sockaddr_in6.sin6_addr)) {
             size += offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in6);
@@ -259,8 +259,8 @@ nxt_listen_socket_pool_min_size(nxt_listen_socket_t *ls)
          * sizeof(struct sockaddr_un), see comment in nxt_socket.h.
          */
         ls->socklen = 3;
-        size = ls->socklen + sizeof("unix:") - 1;
-        ls->address_length = sizeof("unix:") - 1;
+        size = ls->socklen + nxt_length("unix:");
+        ls->address_length = nxt_length("unix:");
 
         break;
 
@@ -271,7 +271,7 @@ nxt_listen_socket_pool_min_size(nxt_listen_socket_t *ls)
         ls->address_length = NXT_INET_ADDR_STR_LEN;
 
         size = offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in)
-               + NXT_INET_ADDR_STR_LEN + (sizeof(":65535") - 1);
+               + NXT_INET_ADDR_STR_LEN + nxt_length(":65535");
 
         if (ls->sockaddr->u.sockaddr_in.sin_addr.s_addr == INADDR_ANY) {
             size += offsetof(nxt_sockaddr_t, u) + sizeof(struct sockaddr_in);
diff --git a/src/nxt_php_sapi.c b/src/nxt_php_sapi.c
index 5aae2f45..f495364a 100644
--- a/src/nxt_php_sapi.c
+++ b/src/nxt_php_sapi.c
@@ -635,8 +635,8 @@ nxt_php_send_headers(sapi_headers_struct *sapi_headers TSRMLS_DC)
     } while(0)
 
     if (SG(request_info).no_headers == 1) {
-        RC(nxt_php_write(ctx, default_repsonse, sizeof(default_repsonse) - 1,
-                      1, 0));
+        RC(nxt_php_write(ctx, default_repsonse, nxt_length(default_repsonse),
+                         1, 0));
         return SAPI_HEADER_SENT_SUCCESSFULLY;
     }
 
@@ -660,21 +660,21 @@ nxt_php_send_headers(sapi_headers_struct *sapi_headers TSRMLS_DC)
         RC(nxt_php_write(ctx, buf, len, 0, 0));
 
     } else {
-        RC(nxt_php_write(ctx, status_200, sizeof(status_200) - 1, 0, 0));
+        RC(nxt_php_write(ctx, status_200, nxt_length(status_200), 0, 0));
     }
 
-    RC(nxt_php_write(ctx, cr_lf, sizeof(cr_lf) - 1, 0, 0));
+    RC(nxt_php_write(ctx, cr_lf, nxt_length(cr_lf), 0, 0));
 
     h = zend_llist_get_first_ex(&sapi_headers->headers, &zpos);
 
     while (h) {
         RC(nxt_php_write(ctx, (u_char *) h->header, h->header_len, 0, 0));
-        RC(nxt_php_write(ctx, cr_lf, sizeof(cr_lf) - 1, 0, 0));
+        RC(nxt_php_write(ctx, cr_lf, nxt_length(cr_lf), 0, 0));
 
         h = zend_llist_get_next_ex(&sapi_headers->headers, &zpos);
     }
 
-    RC(nxt_php_write(ctx, cr_lf, sizeof(cr_lf) - 1, 1, 0));
+    RC(nxt_php_write(ctx, cr_lf, nxt_length(cr_lf), 1, 0));
 
 #undef RC
 
diff --git a/src/nxt_python_wsgi.c b/src/nxt_python_wsgi.c
index 49063ae9..4b90483e 100644
--- a/src/nxt_python_wsgi.c
+++ b/src/nxt_python_wsgi.c
@@ -870,7 +870,7 @@ nxt_py_start_resp(PyObject *self, PyObject *args)
 
     string = PyTuple_GET_ITEM(args, 0);
 
-    nxt_python_write(ctx, status, sizeof(status) - 1, 0, 0);
+    nxt_python_write(ctx, status, nxt_length(status), 0, 0);
 
     rc = nxt_python_write_py_str(ctx, string, 0, 0);
     if (nxt_slow_path(rc != NXT_OK)) {
@@ -878,7 +878,7 @@ nxt_py_start_resp(PyObject *self, PyObject *args)
                             "failed to write first argument (not a string?)");
     }
 
-    nxt_python_write(ctx, cr_lf, sizeof(cr_lf) - 1, 0, 0);
+    nxt_python_write(ctx, cr_lf, nxt_length(cr_lf), 0, 0);
 
     headers = PyTuple_GET_ITEM(args, 1);
 
@@ -909,7 +909,7 @@ nxt_py_start_resp(PyObject *self, PyObject *args)
                                  " (not a string?)");
         }
 
-        nxt_python_write(ctx, sc_sp, sizeof(sc_sp) - 1, 0, 0);
+        nxt_python_write(ctx, sc_sp, nxt_length(sc_sp), 0, 0);
 
         string = PyTuple_GET_ITEM(tuple, 1);
 
@@ -920,11 +920,11 @@ nxt_py_start_resp(PyObject *self, PyObject *args)
                                  " (not a string?)");
         }
 
-        nxt_python_write(ctx, cr_lf, sizeof(cr_lf) - 1, 0, 0);
+        nxt_python_write(ctx, cr_lf, nxt_length(cr_lf), 0, 0);
     }
 
     /* flush headers */
-    nxt_python_write(ctx, cr_lf, sizeof(cr_lf) - 1, 1, 0);
+    nxt_python_write(ctx, cr_lf, nxt_length(cr_lf), 1, 0);
 
     Py_INCREF(nxt_py_write_obj);
     return nxt_py_write_obj;
diff --git a/src/nxt_random.c b/src/nxt_random.c
index 0731b7fb..b6c9f704 100644
--- a/src/nxt_random.c
+++ b/src/nxt_random.c
@@ -180,7 +180,7 @@ nxt_random_test(nxt_thread_t *thr)
 
     r.count = 400000;
 
-    nxt_random_add(&r, (u_char *) "arc4random", sizeof("arc4random") - 1);
+    nxt_random_add(&r, (u_char *) "arc4random", nxt_length("arc4random"));
 
     /*
      * Test arc4random() numbers.
diff --git a/src/nxt_router.c b/src/nxt_router.c
index fa9dd17f..162e7073 100644
--- a/src/nxt_router.c
+++ b/src/nxt_router.c
@@ -1880,8 +1880,8 @@ nxt_router_listen_socket_error(nxt_task_t *task, nxt_port_recv_msg_t *msg,
 
     error = *p++;
 
-    size = sizeof("listen socket error: ") - 1
-           + sizeof("{listener: \"\", code:\"\", message: \"\"}") - 1
+    size = nxt_length("listen socket error: ")
+           + nxt_length("{listener: \"\", code:\"\", message: \"\"}")
            + sa->length + socket_errors[error].length + (in->mem.free - p);
 
     out = nxt_buf_mem_alloc(tmcf->mem_pool, size, 0);
@@ -2753,7 +2753,7 @@ nxt_router_access_log_writer(nxt_task_t *task, nxt_http_request_t *r,
         (nxt_atomic_uint_t) -1,
         nxt_router_access_log_date,
         "%02d/%s/%4d:%02d:%02d:%02d %c%02d%02d",
-        sizeof("31/Dec/1986:19:40:00 +0300") - 1,
+        nxt_length("31/Dec/1986:19:40:00 +0300"),
         NXT_THREAD_TIME_LOCAL,
         NXT_THREAD_TIME_SEC,
     };
diff --git a/src/nxt_runtime.c b/src/nxt_runtime.c
index 1dfe2f61..b72cd7d8 100644
--- a/src/nxt_runtime.c
+++ b/src/nxt_runtime.c
@@ -844,7 +844,7 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
 
         if (nxt_strcmp(p, "--control") == 0) {
             if (*argv == NULL) {
-                write(STDERR_FILENO, no_control, sizeof(no_control) - 1);
+                write(STDERR_FILENO, no_control, nxt_length(no_control));
                 return NXT_ERROR;
             }
 
@@ -871,7 +871,7 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
 
         if (nxt_strcmp(p, "--user") == 0) {
             if (*argv == NULL) {
-                write(STDERR_FILENO, no_user, sizeof(no_user) - 1);
+                write(STDERR_FILENO, no_user, nxt_length(no_user));
                 return NXT_ERROR;
             }
 
@@ -884,7 +884,7 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
 
         if (nxt_strcmp(p, "--group") == 0) {
             if (*argv == NULL) {
-                write(STDERR_FILENO, no_group, sizeof(no_group) - 1);
+                write(STDERR_FILENO, no_group, nxt_length(no_group));
                 return NXT_ERROR;
             }
 
@@ -897,7 +897,7 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
 
         if (nxt_strcmp(p, "--pid") == 0) {
             if (*argv == NULL) {
-                write(STDERR_FILENO, no_pid, sizeof(no_pid) - 1);
+                write(STDERR_FILENO, no_pid, nxt_length(no_pid));
                 return NXT_ERROR;
             }
 
@@ -910,7 +910,7 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
 
         if (nxt_strcmp(p, "--log") == 0) {
             if (*argv == NULL) {
-                write(STDERR_FILENO, no_log, sizeof(no_log) - 1);
+                write(STDERR_FILENO, no_log, nxt_length(no_log));
                 return NXT_ERROR;
             }
 
@@ -923,7 +923,7 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
 
         if (nxt_strcmp(p, "--modules") == 0) {
             if (*argv == NULL) {
-                write(STDERR_FILENO, no_modules, sizeof(no_modules) - 1);
+                write(STDERR_FILENO, no_modules, nxt_length(no_modules));
                 return NXT_ERROR;
             }
 
@@ -936,7 +936,7 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
 
         if (nxt_strcmp(p, "--state") == 0) {
             if (*argv == NULL) {
-                write(STDERR_FILENO, no_state, sizeof(no_state) - 1);
+                write(STDERR_FILENO, no_state, nxt_length(no_state));
                 return NXT_ERROR;
             }
 
@@ -953,18 +953,18 @@ nxt_runtime_conf_read_cmd(nxt_task_t *task, nxt_runtime_t *rt)
         }
 
         if (nxt_strcmp(p, "--version") == 0) {
-            write(STDERR_FILENO, version, sizeof(version) - 1);
+            write(STDERR_FILENO, version, nxt_length(version));
             exit(0);
         }
 
         if (nxt_strcmp(p, "--help") == 0 || nxt_strcmp(p, "-h") == 0) {
-            write(STDOUT_FILENO, help, sizeof(help) - 1);
+            write(STDOUT_FILENO, help, nxt_length(help));
 
             if (sizeof(NXT_GROUP) == 1) {
-                write(STDOUT_FILENO, primary, sizeof(primary) - 1);
+                write(STDOUT_FILENO, primary, nxt_length(primary));
 
             } else {
-                write(STDOUT_FILENO, group, sizeof(group) - 1);
+                write(STDOUT_FILENO, group, nxt_length(group));
             }
 
             exit(0);
diff --git a/src/nxt_sockaddr.c b/src/nxt_sockaddr.c
index 0df40a1f..9bf32a11 100644
--- a/src/nxt_sockaddr.c
+++ b/src/nxt_sockaddr.c
@@ -203,7 +203,7 @@ nxt_getsockname(nxt_task_t *task, nxt_mp_t *mp, nxt_socket_t s)
 
 #if (NXT_HAVE_UNIX_DOMAIN)
         case AF_UNIX:
-             length = sizeof("unix:") - 1 + socklen;
+             length = nxt_length("unix:") + socklen;
 #endif
              break;
 
@@ -515,7 +515,7 @@ nxt_inet6_ntop(u_char *addr, u_char *buf, u_char *end)
     nxt_uint_t   i, zero_start, last_zero_start;
 
     const size_t  max_inet6_length =
-                      sizeof("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff") - 1;
+                        nxt_length("ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff");
 
     if (buf + max_inet6_length > end) {
         return buf;
diff --git a/src/nxt_sockaddr.h b/src/nxt_sockaddr.h
index ca5d8054..aa4da5d2 100644
--- a/src/nxt_sockaddr.h
+++ b/src/nxt_sockaddr.h
@@ -99,10 +99,10 @@ NXT_EXPORT nxt_int_t nxt_inet6_addr(struct in6_addr *in6_addr, u_char *buf,
 #endif
 
 
-#define NXT_INET_ADDR_STR_LEN     (sizeof("255.255.255.255:65535") - 1)
+#define NXT_INET_ADDR_STR_LEN     nxt_length("255.255.255.255:65535")
 
 #define NXT_INET6_ADDR_STR_LEN                                                \
-    (sizeof("[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535") - 1)
+    nxt_length("[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")
 
 
 #define nxt_sockaddr_size(sa)                                                 \
diff --git a/src/nxt_sprintf.c b/src/nxt_sprintf.c
index 789d58f1..f2e2b414 100644
--- a/src/nxt_sprintf.c
+++ b/src/nxt_sprintf.c
@@ -380,13 +380,13 @@ nxt_vsprintf(u_char *buf, u_char *end, const char *fmt, va_list args)
 
             if (nxt_slow_path(isnan(f))) {
                 p = (u_char *) nan;
-                length = sizeof(nan) - 1;
+                length = nxt_length(nan);
 
                 goto copy;
 
             } else if (nxt_slow_path(isinf(f))) {
                 p = (u_char *) infinity;
-                length = sizeof(infinity) - 1;
+                length = nxt_length(infinity);
 
                 goto copy;
             }
diff --git a/src/nxt_string.h b/src/nxt_string.h
index 2a3d55ea..e6d32fa6 100644
--- a/src/nxt_string.h
+++ b/src/nxt_string.h
@@ -24,7 +24,7 @@ nxt_isdigit(c)                                                                \
 #define NXT_CR             (u_char) 13
 #define NXT_LF             (u_char) 10
 #define NXT_CRLF           "\x0d\x0a"
-#define NXT_CRLF_SIZE      (sizeof(NXT_CRLF) - 1)
+#define NXT_CRLF_SIZE      nxt_length(NXT_CRLF)
 
 
 #define NXT_LINEFEED_SIZE  1
@@ -116,7 +116,7 @@ typedef struct {
 } nxt_str_t;
 
 
-#define nxt_string(str)       { sizeof(str) - 1, (u_char *) str }
+#define nxt_string(str)       { nxt_length(str), (u_char *) str }
 #define nxt_string_zero(str)  { sizeof(str), (u_char *) str }
 #define nxt_null_string       { 0, NULL }
 
@@ -124,7 +124,7 @@ typedef struct {
 #define                                                                       \
 nxt_str_set(str, text)                                                        \
     do {                                                                      \
-        (str)->length = sizeof(text) - 1;                                     \
+        (str)->length = nxt_length(text);                                     \
         (str)->start = (u_char *) text;                                       \
     } while (0)
 
diff --git a/src/nxt_types.h b/src/nxt_types.h
index 98e23222..03e9c187 100644
--- a/src/nxt_types.h
+++ b/src/nxt_types.h
@@ -76,11 +76,11 @@ typedef time_t               nxt_time_t;
 #endif
 
 
-#define NXT_INT64_T_LEN      (sizeof("-9223372036854775808") - 1)
-#define NXT_INT32_T_LEN      (sizeof("-2147483648") - 1)
+#define NXT_INT64_T_LEN      nxt_length("-9223372036854775808")
+#define NXT_INT32_T_LEN      nxt_length("-2147483648")
 
-#define NXT_INT64_T_HEXLEN   (sizeof("FFFFFFFFFFFFFFFF") - 1)
-#define NXT_INT32_T_HEXLEN   (sizeof("FFFFFFFF") - 1)
+#define NXT_INT64_T_HEXLEN   nxt_length("FFFFFFFFFFFFFFFF")
+#define NXT_INT32_T_HEXLEN   nxt_length("FFFFFFFF")
 
 #define NXT_INT64_T_MAX      0x7FFFFFFFFFFFFFFFLL
 #define NXT_INT32_T_MAX      0x7FFFFFFF
diff --git a/src/nxt_upstream_source.h b/src/nxt_upstream_source.h
index 4189a356..143b8d0c 100644
--- a/src/nxt_upstream_source.h
+++ b/src/nxt_upstream_source.h
@@ -69,7 +69,7 @@ struct nxt_upstream_source_s {
 #define NXT_UPSTREAM_NAME_VALUE_MIN_SIZE                                      \
     offsetof(nxt_http_upstream_header_t, name)
 
-#define nxt_upstream_name_value(s)   sizeof(s) - 1, s
+#define nxt_upstream_name_value(s)   nxt_length(s), s
 
 
 NXT_EXPORT nxt_int_t nxt_upstream_header_hash_add(nxt_mp_t *mp,
diff --git a/src/perl/nxt_perl_psgi.c b/src/perl/nxt_perl_psgi.c
index 16bcf79f..3619dcd0 100644
--- a/src/perl/nxt_perl_psgi.c
+++ b/src/perl/nxt_perl_psgi.c
@@ -158,9 +158,9 @@ nxt_perl_psgi_http_write_status_str(nxt_task_t *task, nxt_app_wmsg_t *wmsg,
                                                            \
     } while (0)
 
-    RC_WRT((const u_char *) "Status: ", (sizeof("Status: ") - 1), 0);
+    RC_WRT((const u_char *) "Status: ", nxt_length("Status: "), 0);
     RC_WRT(http_status->start, http_status->length, 0);
-    RC_WRT((u_char *) "\r\n", (sizeof("\r\n") - 1), 0);
+    RC_WRT((u_char *) "\r\n", nxt_length("\r\n"), 0);
 
 #undef RC_WRT
 
@@ -799,12 +799,10 @@ nxt_perl_psgi_result_head(PerlInterpreter *my_perl, SV *sv_head,
 
         if ((i % 2) == 0) {
             rc = nxt_app_msg_write_raw(task, wmsg,
-                                       (u_char *) ": ",
-                                       (sizeof(": ") - 1));
+                                       (u_char *) ": ", nxt_length(": "));
         } else {
             rc = nxt_app_msg_write_raw(task, wmsg,
-                                       (u_char *) "\r\n",
-                                       (sizeof("\r\n") - 1));
+                                       (u_char *) "\r\n", nxt_length("\r\n"));
         }
 
         if (nxt_slow_path(rc != NXT_OK)) {
@@ -973,8 +971,8 @@ nxt_perl_psgi_result_array(PerlInterpreter *my_perl, SV *result,
     }
 
     if (array_len < 1) {
-        rc = nxt_app_msg_write_raw(task, wmsg, (u_char *) "\r\n",
-                                   (sizeof("\r\n") - 1));
+        rc = nxt_app_msg_write_raw(task, wmsg,
+                                   (u_char *) "\r\n", nxt_length("\r\n"));
 
         if (nxt_slow_path(rc != NXT_OK)) {
             nxt_log_error(NXT_LOG_ERR, task->log,
@@ -1001,8 +999,8 @@ nxt_perl_psgi_result_array(PerlInterpreter *my_perl, SV *result,
         return rc;
     }
 
-    rc = nxt_app_msg_write_raw(task, wmsg, (u_char *) "\r\n",
-                               (sizeof("\r\n") - 1));
+    rc = nxt_app_msg_write_raw(task, wmsg,
+                               (u_char *) "\r\n", nxt_length("\r\n"));
 
     if (nxt_slow_path(rc != NXT_OK)) {
         nxt_log_error(NXT_LOG_ERR, task->log,
diff --git a/src/ruby/nxt_ruby.c b/src/ruby/nxt_ruby.c
index 230c5b98..e9fa01c8 100644
--- a/src/ruby/nxt_ruby.c
+++ b/src/ruby/nxt_ruby.c
@@ -581,7 +581,7 @@ nxt_ruby_rack_result_status(VALUE result)
     }
 
     rc = nxt_ruby_write(nxt_ruby_run_ctx.task, nxt_ruby_run_ctx.wmsg,
-                        (u_char *) "Status: ", (sizeof("Status: ") - 1), 0, 0);
+                        (u_char *) "Status: ", nxt_length("Status: "), 0, 0);
     if (nxt_slow_path(rc != NXT_OK)) {
         return NXT_ERROR;
     }
@@ -593,7 +593,7 @@ nxt_ruby_rack_result_status(VALUE result)
     }
 
     rc = nxt_ruby_write(nxt_ruby_run_ctx.task, nxt_ruby_run_ctx.wmsg,
-                        (u_char *) "\r\n", (sizeof("\r\n") - 1), 0, 0);
+                        (u_char *) "\r\n", nxt_length("\r\n"), 0, 0);
     if (nxt_slow_path(rc != NXT_OK)) {
         return NXT_ERROR;
     }
@@ -643,7 +643,7 @@ nxt_ruby_rack_result_headers(VALUE result)
     }
 
     rc = nxt_ruby_write(nxt_ruby_run_ctx.task, nxt_ruby_run_ctx.wmsg,
-                        (u_char *) "\r\n", (sizeof("\r\n") - 1), 0, 0);
+                        (u_char *) "\r\n", nxt_length("\r\n"), 0, 0);
     if (nxt_slow_path(rc != NXT_OK)) {
         return NXT_ERROR;
     }
@@ -729,7 +729,7 @@ nxt_ruby_head_send_part(const char *key, size_t key_size,
     }
 
     rc = nxt_app_msg_write_raw(nxt_ruby_run_ctx.task, nxt_ruby_run_ctx.wmsg,
-                               (u_char *) ": ", (sizeof(": ") - 1));
+                               (u_char *) ": ", nxt_length(": "));
     if (nxt_slow_path(rc != NXT_OK)) {
         return rc;
     }
@@ -741,7 +741,7 @@ nxt_ruby_head_send_part(const char *key, size_t key_size,
     }
 
     return nxt_app_msg_write_raw(nxt_ruby_run_ctx.task, nxt_ruby_run_ctx.wmsg,
-                                 (u_char *) "\r\n", (sizeof("\r\n") - 1));
+                                 (u_char *) "\r\n", nxt_length("\r\n"));
 }
 
 
diff --git a/src/test/nxt_utf8_test.c b/src/test/nxt_utf8_test.c
index 7a6dcd33..bca9a737 100644
--- a/src/test/nxt_utf8_test.c
+++ b/src/test/nxt_utf8_test.c
@@ -178,8 +178,8 @@ nxt_utf8_test(nxt_thread_t *thr)
 
     n = nxt_utf8_casecmp((u_char *) "ABC АБВ ΑΒΓ",
                          (u_char *) "abc абв αβγ",
-                             sizeof("ABC АБВ ΑΒΓ") - 1,
-                             sizeof("abc абв αβγ") - 1);
+                         nxt_length("ABC АБВ ΑΒΓ"),
+                         nxt_length("abc абв αβγ"));
 
     if (n != 0) {
         nxt_log_alert(thr->log, "nxt_utf8_casecmp() failed");