mirrors/cpython
0
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2024-11-23 09:54:58 +08:00
Code Issues Packages Projects Releases Wiki Activity

Remove PyFloat_AsReprString() and PyFloat_AsString() which should not

Browse Source 
have been public due to passing buffers without lengths.
This commit is contained in:
Neal Norwitz 2006-12-28 04:45:06 +00:00
parent 51d00223c3
commit 545686b279
3 changed files with 27 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
Include/floatobject.h
View File

@ -34,19 +34,6 @@ PyAPI_FUNC(PyObject *) PyFloat_FromDouble(double);
PyAPI_FUNC(double) PyFloat_AsDouble(PyObject *);
#define PyFloat_AS_DOUBLE(op) (((PyFloatObject *)(op))->ob_fval)
/* Write repr(v) into the char buffer argument, followed by null byte. The
buffer must be "big enough"; >= 100 is very safe.
PyFloat_AsReprString(buf, x) strives to print enough digits so that
PyFloat_FromString(buf) then reproduces x exactly. */
PyAPI_FUNC(void) PyFloat_AsReprString(char*, PyFloatObject *v);
/* Write str(v) into the char buffer argument, followed by null byte. The
buffer must be "big enough"; >= 100 is very safe. Note that it's
unusual to be able to get back the float you started with from
PyFloat_AsString's result -- use PyFloat_AsReprString() if you want to
preserve precision across conversions. */
PyAPI_FUNC(void) PyFloat_AsString(char*, PyFloatObject *v);
/* _PyFloat_{Pack,Unpack}{4,8}
*
* The struct and pickle (at least) modules need an efficient platform-
@ -82,6 +69,11 @@ PyAPI_FUNC(void) PyFloat_AsString(char*, PyFloatObject *v);
PyAPI_FUNC(int) _PyFloat_Pack4(double x, unsigned char *p, int le);
PyAPI_FUNC(int) _PyFloat_Pack8(double x, unsigned char *p, int le);
/* Needed for the old way for marshal to store a floating point number.
Returns the string length copied into p, -1 on error.
*/
PyAPI_FUNC(int) _PyFloat_Repr(double x, char *p, size_t len);
/* The unpack routines read 4 or 8 bytes, starting at p. le is a bool
* argument, true if the string is in little-endian format (exponent
* last, at p+3 or p+7), false if big-endian (exponent first, at p).
@ -93,7 +85,6 @@ PyAPI_FUNC(int) _PyFloat_Pack8(double x, unsigned char *p, int le);
PyAPI_FUNC(double) _PyFloat_Unpack4(const unsigned char *p, int le);
PyAPI_FUNC(double) _PyFloat_Unpack8(const unsigned char *p, int le);
#ifdef __cplusplus
}
#endif

43
Objects/floatobject.c
View File

@ -220,19 +220,18 @@ PyFloat_AsDouble(PyObject *op)
/* Methods */
static void
format_float(char *buf, size_t buflen, PyFloatObject *v, int precision)
format_double(char *buf, size_t buflen, double ob_fval, int precision)
{
register char *cp;
char format[32];
/* Subroutine for float_repr and float_print.
/* Subroutine for float_repr, float_str, float_print and others.
We want float numbers to be recognizable as such,
i.e., they should contain a decimal point or an exponent.
However, %g may print the number as an integer;
in such cases, we append ".0" to the string. */
assert(PyFloat_Check(v));
PyOS_snprintf(format, 32, "%%.%ig", precision);
PyOS_ascii_formatd(buf, buflen, format, v->ob_fval);
PyOS_ascii_formatd(buf, buflen, format, ob_fval);
cp = buf;
if (*cp == '-')
cp++;
@ -249,14 +248,11 @@ format_float(char *buf, size_t buflen, PyFloatObject *v, int precision)
}
}
/* XXX PyFloat_AsStringEx should not be a public API function (for one
XXX thing, its signature passes a buffer without a length; for another,
XXX it isn't useful outside this file).
*/
void
PyFloat_AsStringEx(char *buf, PyFloatObject *v, int precision)
static void
format_float(char *buf, size_t buflen, PyFloatObject *v, int precision)
{
format_float(buf, 100, v, precision);
assert(PyFloat_Check(v));
format_double(buf, buflen, PyFloat_AS_DOUBLE(v), precision);
}
/* Macro and helper that convert PyObject obj to a C double and store
@ -312,21 +308,6 @@ convert_to_double(PyObject **v, double *dbl)
#define PREC_REPR 17
#define PREC_STR 12
/* XXX PyFloat_AsString and PyFloat_AsReprString should be deprecated:
XXX they pass a char buffer without passing a length.
*/
void
PyFloat_AsString(char *buf, PyFloatObject *v)
{
format_float(buf, 100, v, PREC_STR);
}
void
PyFloat_AsReprString(char *buf, PyFloatObject *v)
{
format_float(buf, 100, v, PREC_REPR);
}
/* ARGSUSED */
static int
float_print(PyFloatObject *v, FILE *fp, int flags)
@ -1275,7 +1256,7 @@ PyFloat_Fini(void)
if (PyFloat_CheckExact(p) &&
p->ob_refcnt != 0) {
char buf[100];
PyFloat_AsString(buf, p);
format_float(buf, sizeof(buf), p, PREC_STR);
/* XXX(twouters) cast refcount to
long until %zd is universally
available
@ -1527,6 +1508,14 @@ _PyFloat_Pack8(double x, unsigned char *p, int le)
}
}
/* Should only be used by marshal. */
int
_PyFloat_Repr(double x, char *p, size_t len)
{
format_double(p, len, x, PREC_REPR);
return (int)strlen(p);
}
double
_PyFloat_Unpack4(const unsigned char *p, int le)
{

26
Python/marshal.c
View File

@ -182,8 +182,8 @@ w_object(PyObject *v, WFILE *p)
}
else {
char buf[256]; /* Plenty to format any double */
PyFloat_AsReprString(buf, (PyFloatObject *)v);
n = strlen(buf);
n = _PyFloat_Repr(PyFloat_AS_DOUBLE(v),
buf, sizeof(buf));
w_byte(TYPE_FLOAT, p);
w_byte((int)n, p);
w_string(buf, (int)n, p);
@ -209,28 +209,14 @@ w_object(PyObject *v, WFILE *p)
}
else {
char buf[256]; /* Plenty to format any double */
PyFloatObject *temp;
w_byte(TYPE_COMPLEX, p);
temp = (PyFloatObject*)PyFloat_FromDouble(
PyComplex_RealAsDouble(v));
if (!temp) {
p->error = 1;
return;
}
PyFloat_AsReprString(buf, temp);
Py_DECREF(temp);
n = _PyFloat_Repr(PyComplex_RealAsDouble(v),
buf, sizeof(buf));
n = strlen(buf);
w_byte((int)n, p);
w_string(buf, (int)n, p);
temp = (PyFloatObject*)PyFloat_FromDouble(
PyComplex_ImagAsDouble(v));
if (!temp) {
p->error = 1;
return;
}
PyFloat_AsReprString(buf, temp);
Py_DECREF(temp);
n = strlen(buf);
n = _PyFloat_Repr(PyComplex_ImagAsDouble(v),
buf, sizeof(buf));
w_byte((int)n, p);
w_string(buf, (int)n, p);
}