Use the new Py_ARRAY_LENGTH macro

Modules/_testcapimodule.c

@@ -1593,7 +1593,7 @@ test_long_numbits(PyObject *self)
              {-0xfffffffL, 28, -1}};
     int i;
 
-    for (i = 0; i < sizeof(testcases) / sizeof(struct triple); ++i) {
+    for (i = 0; i < Py_ARRAY_LENGTH(testcases); ++i) {
         PyObject *plong = PyLong_FromLong(testcases[i].input);
         size_t nbits = _PyLong_NumBits(plong);
         int sign = _PyLong_Sign(plong);

Modules/faulthandler.c

@@ -112,7 +112,7 @@ static fault_handler_t faulthandler_handlers[] = {
     {SIGSEGV, 0, "Segmentation fault", }
 };
 static const unsigned char faulthandler_nsignals = \
-    sizeof(faulthandler_handlers) / sizeof(faulthandler_handlers[0]);
+    Py_ARRAY_LENGTH(faulthandler_handlers);
 
 #ifdef HAVE_SIGALTSTACK
 static stack_t stack;

Modules/mathmodule.c

@@ -1435,7 +1435,7 @@ math_factorial(PyObject *self, PyObject *arg)
     }
 
     /* use lookup table if x is small */
-    if (x < (long)(sizeof(SmallFactorials)/sizeof(SmallFactorials[0])))
+    if (x < (long)Py_ARRAY_LENGTH(SmallFactorials))
         return PyLong_FromUnsignedLong(SmallFactorials[x]);
 
     /* else express in the form odd_part * 2**two_valuation, and compute as

Modules/ossaudiodev.c

@@ -1061,8 +1061,8 @@ build_namelists (PyObject *module)
     int num_controls;
     int i;
 
-    num_controls = sizeof(control_labels) / sizeof(control_labels[0]);
+    num_controls = Py_ARRAY_LENGTH(control_labels);
-    assert(num_controls == sizeof(control_names) / sizeof(control_names[0]));
+    assert(num_controls == Py_ARRAY_LENGTH(control_names));
 
     labels = PyList_New(num_controls);
     names = PyList_New(num_controls);

Modules/posixmodule.c

@@ -2895,9 +2895,9 @@ posix__getfullpathname(PyObject *self, PyObject *args)
         DWORD result;
         PyObject *v;
         result = GetFullPathNameW(wpath,
-                                  sizeof(woutbuf)/sizeof(woutbuf[0]),
+                                  Py_ARRAY_LENGTH(woutbuf),
                                   woutbuf, &wtemp);
-        if (result > sizeof(woutbuf)/sizeof(woutbuf[0])) {
+        if (result > Py_ARRAY_LENGTH(woutbuf)) {
             woutbufp = malloc(result * sizeof(Py_UNICODE));
             if (!woutbufp)
                 return PyErr_NoMemory();
@@ -2920,7 +2920,7 @@ posix__getfullpathname(PyObject *self, PyObject *args)
                            PyUnicode_FSConverter, &opath))
         return NULL;
     path = PyBytes_AsString(opath);
-    if (!GetFullPathName(path, sizeof(outbuf)/sizeof(outbuf[0]),
+    if (!GetFullPathName(path, Py_ARRAY_LENGTH(outbuf),
                          outbuf, &temp)) {
         win32_error("GetFullPathName", path);
         Py_DECREF(opath);
@@ -5656,7 +5656,7 @@ posix_getlogin(PyObject *self, PyObject *noargs)
     PyObject *result = NULL;
 #ifdef MS_WINDOWS
     wchar_t user_name[UNLEN + 1];
-    DWORD num_chars = sizeof(user_name)/sizeof(user_name[0]);
+    DWORD num_chars = Py_ARRAY_LENGTH(user_name);
 
     if (GetUserNameW(user_name, &num_chars)) {
         /* num_chars is the number of unicode chars plus null terminator */

Modules/socketmodule.c

@@ -3812,7 +3812,7 @@ socket_gethostname(PyObject *self, PyObject *unused)
        version of the hostname, whereas we need a Unicode string.
        Otherwise, gethostname apparently also returns the DNS name. */
     wchar_t buf[MAX_COMPUTERNAME_LENGTH + 1];
-    DWORD size = sizeof(buf) / sizeof(wchar_t);
+    DWORD size = Py_ARRAY_LENGTH(buf);
     PyObject *result;
     if (!GetComputerNameExW(ComputerNamePhysicalDnsHostname, buf, &size)) {
         if (GetLastError() == ERROR_MORE_DATA) {
@@ -6281,7 +6281,7 @@ PyInit__socket(void)
         DWORD codes[] = {SIO_RCVALL, SIO_KEEPALIVE_VALS};
         const char *names[] = {"SIO_RCVALL", "SIO_KEEPALIVE_VALS"};
         int i;
-        for(i = 0; i<sizeof(codes)/sizeof(*codes); ++i) {
+        for(i = 0; i<Py_ARRAY_LENGTH(codes); ++i) {
             PyObject *tmp;
             tmp = PyLong_FromUnsignedLong(codes[i]);
             if (tmp == NULL)

Modules/unicodedata.c

@@ -439,7 +439,7 @@ unicodedata_decomposition(PyObject *self, PyObject *args)
        from Tools/unicode/makeunicodedata.py, it should not be possible
        to overflow decomp_prefix. */
     prefix_index = decomp_data[index] & 255;
-    assert(prefix_index < (sizeof(decomp_prefix)/sizeof(*decomp_prefix)));
+    assert(prefix_index < Py_ARRAY_LENGTH(decomp_prefix));
 
     /* copy prefix */
     i = strlen(decomp_prefix[prefix_index]);

Objects/longobject.c

@@ -2444,8 +2444,7 @@ _PyLong_Frexp(PyLongObject *a, Py_ssize_t *e)
                     break;
                 }
     }
-    assert(1 <= x_size &&
+    assert(1 <= x_size && x_size <= (Py_ssize_t)Py_ARRAY_LENGTH(x_digits));
-           x_size <= (Py_ssize_t)(sizeof(x_digits)/sizeof(digit)));
 
     /* Round, and convert to double. */
     x_digits[0] += half_even_correction[x_digits[0] & 7];

Objects/typeobject.c

@@ -2355,7 +2355,7 @@ PyObject* PyType_FromSpec(PyType_Spec *spec)
     res->ht_type.tp_flags = spec->flags | Py_TPFLAGS_HEAPTYPE;
 
     for (slot = spec->slots; slot->slot; slot++) {
-        if (slot->slot >= sizeof(slotoffsets)/sizeof(slotoffsets[0])) {
+        if (slot->slot >= Py_ARRAY_LENGTH(slotoffsets)) {
             PyErr_SetString(PyExc_RuntimeError, "invalid slot offset");
             goto fail;
         }

Objects/unicodeobject.c

@@ -12552,7 +12552,7 @@ void _PyUnicode_Init(void)
     /* initialize the linebreak bloom filter */
     bloom_linebreak = make_bloom_mask(
         PyUnicode_2BYTE_KIND, linebreak,
-        sizeof(linebreak) / sizeof(linebreak[0]));
+        Py_ARRAY_LENGTH(linebreak));
 
     PyType_Ready(&EncodingMapType);
 }

PC/frozen_dllmain.c

@@ -77,7 +77,7 @@ void PyWinFreeze_ExeTerm(void)
 {
     // Must go backwards
     char **modName;
-    for (modName = possibleModules+(sizeof(possibleModules) / sizeof(char *))-2;
+    for (modName = possibleModules+Py_ARRAY_LENGTH(possibleModules)-2;
          modName >= possibleModules;
          *modName--) {
 /*              printf("Terminating '%s'\n", *modName);*/
@@ -103,7 +103,7 @@ BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
         {
             // Must go backwards
             char **modName;
-            for (modName = possibleModules+(sizeof(possibleModules) / sizeof(char *))-2;
+            for (modName = possibleModules+Py_ARRAY_LENGTH(possibleModules)-2;
                  modName >= possibleModules;
                  *modName--)
                 CallModuleDllMain(*modName, DLL_PROCESS_DETACH);

PC/getpathp.c

@@ -251,7 +251,7 @@ getpythonregpath(HKEY keyBase, int skipcore)
     if (keyBuf==NULL) goto done;
 
     memcpy(keyBufPtr, keyPrefix, sizeof(keyPrefix)-sizeof(WCHAR));
-    keyBufPtr += sizeof(keyPrefix)/sizeof(WCHAR) - 1;
+    keyBufPtr += Py_ARRAY_LENGTH(keyPrefix) - 1;
     mbstowcs(keyBufPtr, PyWin_DLLVersionString, versionLen);
     keyBufPtr += versionLen;
     /* NULL comes with this one! */

Python/codecs.c

@@ -1044,7 +1044,7 @@ static int _PyCodecRegistry_Init(void)
     interp->codec_error_registry = PyDict_New();
 
     if (interp->codec_error_registry) {
-        for (i = 0; i < sizeof(methods)/sizeof(methods[0]); ++i) {
+        for (i = 0; i < Py_ARRAY_LENGTH(methods); ++i) {
             PyObject *func = PyCFunction_New(&methods[i].def, NULL);
             int res;
             if (!func)

Python/dynload_aix.c

@@ -129,7 +129,6 @@ aix_loaderror(const char *pathname)
         {L_ERROR_ERRNO,                 NULL}
     };
 
-#define LOAD_ERRTAB_LEN (sizeof(load_errtab)/sizeof(load_errtab[0]))
 #define ERRBUF_APPEND(s) strncat(errbuf, s, sizeof(errbuf)-strlen(errbuf)-1)
 
     PyOS_snprintf(errbuf, sizeof(errbuf), "from module %.200s ", pathname);
@@ -140,7 +139,7 @@ aix_loaderror(const char *pathname)
     }
     for(i = 0; message[i] && *message[i]; i++) {
         int nerr = atoi(message[i]);
-        for (j=0; j<LOAD_ERRTAB_LEN ; j++) {
+        for (j=0; j < Py_ARRAY_LENGTH(load_errtab); j++) {
             if (nerr == load_errtab[j].errNo && load_errtab[j].errstr)
             ERRBUF_APPEND(load_errtab[j].errstr);
         }

Python/sysmodule.c

@@ -1771,7 +1771,7 @@ sys_update_path(int argc, wchar_t **argv)
         the argument must be the full path anyway. */
         wchar_t *ptemp;
         if (GetFullPathNameW(argv0,
-                           sizeof(fullpath)/sizeof(fullpath[0]),
+                           Py_ARRAY_LENGTH(fullpath),
                            fullpath,
                            &ptemp)) {
             argv0 = fullpath;