Use macro versions instead of function versions when we already know the type.

This will hopefully get rid of some Coverity warnings, be a hint to
developers, and be marginally faster.

Some asserts were added when the type is currently known, but depends
on values from another function.

Modules/stropmodule.c

@@ -942,7 +942,7 @@ strop_translate(PyObject *self, PyObject *args)
 	}
 
 	table = table1;
-	inlen = PyString_Size(input_obj);
+	inlen = PyString_GET_SIZE(input_obj);
 	result = PyString_FromStringAndSize((char *)NULL, inlen);
 	if (result == NULL)
 		return NULL;

Objects/classobject.c

@@ -388,15 +388,15 @@ class_str(PyClassObject *op)
 		Py_INCREF(name);
 		return name;
 	}
-	m = PyString_Size(mod);
-	n = PyString_Size(name);
+	m = PyString_GET_SIZE(mod);
+	n = PyString_GET_SIZE(name);
 	res = PyString_FromStringAndSize((char *)NULL, m+1+n);
 	if (res != NULL) {
-		char *s = PyString_AsString(res);
-		memcpy(s, PyString_AsString(mod), m);
+		char *s = PyString_AS_STRING(res);
+		memcpy(s, PyString_AS_STRING(mod), m);
 		s += m;
 		*s++ = '.';
-		memcpy(s, PyString_AsString(name), n);
+		memcpy(s, PyString_AS_STRING(name), n);
 	}
 	return res;
 }

Objects/frameobject.c

@@ -749,7 +749,7 @@ PyFrame_FastToLocals(PyFrameObject *f)
 		return;
 	PyErr_Fetch(&error_type, &error_value, &error_traceback);
 	fast = f->f_localsplus;
-	j = PyTuple_Size(map);
+	j = PyTuple_GET_SIZE(map);
 	if (j > f->f_nlocals)
 		j = f->f_nlocals;
 	if (f->f_nlocals)
@@ -787,7 +787,7 @@ PyFrame_LocalsToFast(PyFrameObject *f, int clear)
 		return;
 	PyErr_Fetch(&error_type, &error_value, &error_traceback);
 	fast = f->f_localsplus;
-	j = PyTuple_Size(map);
+	j = PyTuple_GET_SIZE(map);
 	if (j > f->f_nlocals)
 		j = f->f_nlocals;
 	if (f->f_nlocals)

Objects/stringobject.c

@@ -569,8 +569,9 @@ PyObject *PyString_DecodeEscape(const char *s,
 				if (!w)	goto failed;
 
 				/* Append bytes to output buffer. */
-				r = PyString_AsString(w);
-				rn = PyString_Size(w);
+				assert(PyString_Check(w));
+				r = PyString_AS_STRING(w);
+				rn = PyString_GET_SIZE(w);
 				memcpy(p, r, rn);
 				p += rn;
 				Py_DECREF(w);
@@ -2314,12 +2315,12 @@ string_translate(PyStringObject *self, PyObject *args)
 	}
 
 	table = table1;
-	inlen = PyString_Size(input_obj);
+	inlen = PyString_GET_SIZE(input_obj);
 	result = PyString_FromStringAndSize((char *)NULL, inlen);
 	if (result == NULL)
 		return NULL;
 	output_start = output = PyString_AsString(result);
-	input = PyString_AsString(input_obj);
+	input = PyString_AS_STRING(input_obj);
 
 	if (dellen == 0) {
 		/* If no deletions are required, use faster code */

Parser/tokenizer.c

@@ -711,7 +711,9 @@ tok_stdin_decode(struct tok_state *tok, char **inp)
 	if (utf8 == NULL)
 		goto error_clear;
 
-	converted = new_string(PyString_AsString(utf8), PyString_Size(utf8));
+	assert(PyString_Check(utf8));
+	converted = new_string(PyString_AS_STRING(utf8),
+			       PyString_GET_SIZE(utf8));
 	Py_DECREF(utf8);
 	if (converted == NULL)
 		goto error_nomem;

Python/import.c

@@ -1216,12 +1216,12 @@ find_module(char *fullname, char *subname, PyObject *path, char *buf,
 #endif
 		if (!PyString_Check(v))
 			continue;
-		len = PyString_Size(v);
+		len = PyString_GET_SIZE(v);
 		if (len + 2 + namelen + MAXSUFFIXSIZE >= buflen) {
 			Py_XDECREF(copy);
 			continue; /* Too long */
 		}
-		strcpy(buf, PyString_AsString(v));
+		strcpy(buf, PyString_AS_STRING(v));
 		if (strlen(buf) != len) {
 			Py_XDECREF(copy);
 			continue; /* v contains '\0' */

Python/traceback.c

@@ -165,7 +165,7 @@ tb_displayline(PyObject *f, char *filename, int lineno, char *name)
 				}
 				if (PyString_Check(v)) {
 					size_t len;
-					len = PyString_Size(v);
+					len = PyString_GET_SIZE(v);
 					if (len + 1 + taillen >= MAXPATHLEN)
 						continue; /* Too long */
 					strcpy(namebuf, PyString_AsString(v));