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Replace the run-time 'future-bytecode-stream-inspection' hack to find out

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how 'import' was called with a compiletime mechanism: create either a tuple
of the import arguments, or None (in the case of a normal import), add it to
the code-block constants, and load it onto the stack before calling
IMPORT_NAME.
This commit is contained in:
Thomas Wouters 2000-08-27 20:31:27 +00:00
parent e868211e10
commit dd13e4f91f
3 changed files with 19 additions and 59 deletions
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56
Python/ceval.c
View File

@ -71,7 +71,6 @@ static int import_all_from(PyObject *, PyObject *);
static PyObject *build_class(PyObject *, PyObject *, PyObject *);
static int exec_statement(PyFrameObject *,
PyObject *, PyObject *, PyObject *);
static PyObject *find_from_args(PyFrameObject *, int);
static void set_exc_info(PyThreadState *, PyObject *, PyObject *, PyObject *);
static void reset_exc_info(PyThreadState *);
@ -1627,11 +1626,7 @@ eval_code2(PyCodeObject *co, PyObject *globals, PyObject *locals,
"__import__ not found");
break;
}
u = find_from_args(f, INSTR_OFFSET());
if (u == NULL) {
x = u;
break;
}
u = POP();
w = Py_BuildValue("(OOOO)",
w,
f->f_globals,
@ -3068,55 +3063,6 @@ exec_statement(PyFrameObject *f, PyObject *prog, PyObject *globals,
return 0;
}
/* Hack for ni.py */
static PyObject *
find_from_args(PyFrameObject *f, int nexti)
{
int opcode;
int oparg;
PyObject *list, *name;
unsigned char *next_instr;
_PyCode_GETCODEPTR(f->f_code, &next_instr);
next_instr += nexti;
opcode = (*next_instr++);
if (opcode != IMPORT_FROM && opcode != IMPORT_STAR) {
Py_INCREF(Py_None);
return Py_None;
}
list = PyList_New(0);
if (list == NULL)
return NULL;
if (opcode == IMPORT_STAR) {
name = PyString_FromString("*");
if (!name)
Py_DECREF(list);
else {
if (PyList_Append(list, name) < 0) {
Py_DECREF(list);
}
Py_DECREF(name);
}
} else {
do {
oparg = (next_instr[1]<<8) + next_instr[0];
/* Jump over our own argument, the next instruction
(which is a STORE), and its argument.*/
next_instr += 5;
name = Getnamev(f, oparg);
if (PyList_Append(list, name) < 0) {
Py_DECREF(list);
break;
}
opcode = (*next_instr++);
} while (opcode == IMPORT_FROM);
}
return list;
}
#ifdef DYNAMIC_EXECUTION_PROFILE

18
Python/compile.c
View File

@ -2329,14 +2329,27 @@ static void
com_import_stmt(struct compiling *c, node *n)
{
int i;
PyObject *tup;
REQ(n, import_stmt);
/* 'import' dotted_name (',' dotted_name)* |
'from' dotted_name 'import' ('*' | NAME (',' NAME)*) */
if (STR(CHILD(n, 0))[0] == 'f') {
/* 'from' dotted_name 'import' ... */
REQ(CHILD(n, 1), dotted_name);
com_addopname(c, IMPORT_NAME, CHILD(n, 1));
if (TYPE(CHILD(n, 3)) == STAR) {
tup = Py_BuildValue("(s)", "*");
} else {
tup = PyTuple_New((NCH(n) - 2)/2);
for (i = 3; i < NCH(n); i += 2) {
PyTuple_SET_ITEM(tup, (i-3)/2,
PyString_FromString(STR(
CHILD(CHILD(n, i), 0))));
}
}
com_addoparg(c, LOAD_CONST, com_addconst(c, tup));
com_push(c, 1);
com_addopname(c, IMPORT_NAME, CHILD(n, 1));
if (TYPE(CHILD(n, 3)) == STAR)
com_addbyte(c, IMPORT_STAR);
else {
@ -2351,8 +2364,9 @@ com_import_stmt(struct compiling *c, node *n)
for (i = 1; i < NCH(n); i += 2) {
node *subn = CHILD(n, i);
REQ(subn, dotted_as_name);
com_addopname(c, IMPORT_NAME, CHILD(subn, 0));
com_addoparg(c, LOAD_CONST, com_addconst(c, Py_None));
com_push(c, 1);
com_addopname(c, IMPORT_NAME, CHILD(subn, 0));
if (NCH(subn) > 1) {
int j;
if (strcmp(STR(CHILD(subn, 1)), "as") != 0) {

4
Python/import.c
View File

@ -66,7 +66,7 @@ extern time_t PyOS_GetLastModificationTime(char *, FILE *);
/* XXX Perhaps the magic number should be frozen and a version field
added to the .pyc file header? */
/* New way to come up with the magic number: (YEAR-1995), MONTH, DAY */
#define MAGIC (50822 | ((long)'\r'<<16) | ((long)'\n'<<24))
#define MAGIC (50823 | ((long)'\r'<<16) | ((long)'\n'<<24))
/* Magic word as global; note that _PyImport_Init() can change the
value of this global to accommodate for alterations of how the
@ -1401,7 +1401,7 @@ PyImport_ImportModule(char *name)
{
static PyObject *fromlist = NULL;
if (fromlist == NULL && strchr(name, '.') != NULL) {
fromlist = Py_BuildValue("[s]", "*");
fromlist = Py_BuildValue("(s)", "*");
if (fromlist == NULL)
return NULL;
}