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Kaydet (Commit) ae1d0c97 authored tarafından Tim Peters's avatar Tim Peters
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Introduced symbol PY_FORMAT_SIZE_T. See the new comments 

in pyport.h.  Changed PyString_FromFormatV() to use it
instead of inlining its own maze of #if'ery.
üst d53850a2
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Showing with 61 additions and 31 deletions
Include/pyport.h
Dosyayı görüntüle @ ae1d0c97
......@@ -85,6 +85,10 @@ typedef PY_LONG_LONG Py_intptr_t;
# error "Python needs a typedef for Py_uintptr_t in pyport.h."
#endif /* HAVE_UINTPTR_T */
/* Py_ssize_t is a signed integral type such that sizeof(Py_ssize_t) ==
* sizeof(size_t). C99 doesn't define such a thing directly (size_t is an
* unsigned integral type). See PEP 353 for details.
*/
#ifdef HAVE_SSIZE_T
typedef ssize_t Py_ssize_t;
#elif SIZEOF_VOID_P == SIZEOF_SIZE_T
......@@ -92,8 +96,43 @@ typedef Py_intptr_t Py_ssize_t;
#else
# error "Python needs a typedef for Py_ssize_t in pyport.h."
#endif
/* Largest positive value of type Py_ssize_t. */
#define PY_SSIZE_T_MAX ((Py_ssize_t)(((size_t)-1)>>1))
/* PY_FORMAT_SIZE_T is a platform-specific modifier for use in a printf
* format to convert an argument with the width of a size_t or Py_ssize_t.
* C99 introduced "z" for this purpose, but not all platforms support that;
* e.g., MS compilers use "I" instead.
*
* These "high level" Python format functions interpret "z" correctly on
* all platforms (Python interprets the format string itself, and does whatever
* the platform C requires to convert a size_t/Py_ssize_t argument):
*
* PyString_FromFormat
* PyErr_Format
* PyString_FromFormatV
*
* Lower-level uses require that you interpolate the correct format modifier
* yourself (e.g., calling printf, fprintf, sprintf, PyOS_snprintf); for
* example,
*
* Py_ssize_t index;
* fprintf(stderr, "index %" PY_FORMAT_SIZE_T "d sucks\n", index);
*
* That will expand to %ld, or %Id, or to something else correct for a
* Py_ssize_t on the platform.
*/
#ifndef PY_FORMAT_SIZE_T
# if SIZEOF_SIZE_T == SIZEOF_LONG
# define PY_FORMAT_SIZE_T "l"
# elif defined(MS_WINDOWS)
# define PY_FORMAT_SIZE_T "I"
# else
# error "This platform's pyconfig.h needs to define PY_FORMAT_SIZE_T"
# endif
#endif
#include <stdlib.h>
#include <math.h> /* Moved here from the math section, before extern "C" */
......
Objects/stringobject.c
Dosyayı görüntüle @ ae1d0c97
......@@ -16,7 +16,7 @@ static PyStringObject *nullstring;
When the interned string reaches a refcnt of 0 the string deallocation
function will delete the reference from this dictionary.
Another way to look at this is that to say that the actual reference
Another way to look at this is that to say that the actual reference
count of a string is: s->ob_refcnt + (s->ob_sstate?2:0)
*/
static PyObject *interned;
......@@ -183,7 +183,7 @@ PyString_FromFormatV(const char *format, va_list vargs)
++f;
/* likewise for %zd */
if (*f == 'z' && *(f+1) == 'd')
++f;
++f;
switch (*f) {
case 'c':
......@@ -273,18 +273,9 @@ PyString_FromFormatV(const char *format, va_list vargs)
case 'd':
if (longflag)
sprintf(s, "%ld", va_arg(vargs, long));
else if (size_tflag) {
/* Instead of checking whether the C
library supports %zd, handle the
common cases. */
#if SIZEOF_SIZE_T == SIZEOF_LONG
sprintf(s, "%ld", va_arg(vargs, long));
#elif defined(MS_WINDOWS)
sprintf(s, "%Id", va_arg(vargs, size_t));
#else
#error Cannot print size_t values
#endif
}
else if (size_tflag)
sprintf(s, "%" PY_FORMAT_SIZE_T "d",
va_arg(vargs, size_t));
else
sprintf(s, "%d", va_arg(vargs, int));
s += strlen(s);
......@@ -622,7 +613,7 @@ PyObject *PyString_DecodeEscape(const char *s,
*p++ = c;
break;
case 'x':
if (isxdigit(Py_CHARMASK(s[0]))
if (isxdigit(Py_CHARMASK(s[0]))
&& isxdigit(Py_CHARMASK(s[1]))) {
unsigned int x = 0;
c = Py_CHARMASK(*s);
......@@ -646,7 +637,7 @@ PyObject *PyString_DecodeEscape(const char *s,
break;
}
if (!errors || strcmp(errors, "strict") == 0) {
PyErr_SetString(PyExc_ValueError,
PyErr_SetString(PyExc_ValueError,
"invalid \\x escape");
goto failed;
}
......@@ -838,7 +829,7 @@ PyString_Repr(PyObject *obj, int smartquotes)
/* figure out which quote to use; single is preferred */
quote = '\'';
if (smartquotes &&
if (smartquotes &&
memchr(op->ob_sval, '\'', op->ob_size) &&
!memchr(op->ob_sval, '"', op->ob_size))
quote = '"';
......@@ -1003,7 +994,7 @@ string_repeat(register PyStringObject *a, register Py_ssize_t n)
/* String slice a[i:j] consists of characters a[i] ... a[j-1] */
static PyObject *
string_slice(register PyStringObject *a, register Py_ssize_t i,
string_slice(register PyStringObject *a, register Py_ssize_t i,
register Py_ssize_t j)
/* j -- may be negative! */
{
......@@ -1047,7 +1038,7 @@ string_contains(PyObject *a, PyObject *el)
if (len_sub == 0)
return 1;
/* last points to one char beyond the start of the rightmost
/* last points to one char beyond the start of the rightmost
substring. When s<last, there is still room for a possible match
and s[0] through s[len_sub-1] will be in bounds.
shortsub is len_sub minus the last character which is checked
......@@ -1207,7 +1198,7 @@ string_subscript(PyStringObject* self, PyObject* item)
char* result_buf;
PyObject* result;
if (PySlice_GetIndicesEx((PySliceObject*)item,
if (PySlice_GetIndicesEx((PySliceObject*)item,
PyString_GET_SIZE(self),
&start, &stop, &step, &slicelength) < 0) {
return NULL;
......@@ -1222,19 +1213,19 @@ string_subscript(PyStringObject* self, PyObject* item)
if (result_buf == NULL)
return PyErr_NoMemory();
for (cur = start, i = 0; i < slicelength;
for (cur = start, i = 0; i < slicelength;
cur += step, i++) {
result_buf[i] = source_buf[cur];
}
result = PyString_FromStringAndSize(result_buf,
result = PyString_FromStringAndSize(result_buf,
slicelength);
PyMem_Free(result_buf);
return result;
}
}
}
else {
PyErr_SetString(PyExc_TypeError,
PyErr_SetString(PyExc_TypeError,
"string indices must be integers");
return NULL;
}
......@@ -1661,7 +1652,7 @@ string_join(PyStringObject *self, PyObject *orig)
}
/* There are at least two things to join, or else we have a subclass
* of the builtin types in the sequence.
* of the builtin types in the sequence.
* Do a pre-pass to figure out the total amount of space we'll
* need (sz), see whether any argument is absurd, and defer to
* the Unicode join if appropriate.
......@@ -2711,7 +2702,7 @@ string_encode(PyStringObject *self, PyObject *args)
char *encoding = NULL;
char *errors = NULL;
PyObject *v;
if (!PyArg_ParseTuple(args, "|ss:encode", &encoding, &errors))
return NULL;
v = PyString_AsEncodedObject((PyObject *)self, encoding, errors);
......@@ -2748,7 +2739,7 @@ string_decode(PyStringObject *self, PyObject *args)
char *encoding = NULL;
char *errors = NULL;
PyObject *v;
if (!PyArg_ParseTuple(args, "|ss:decode", &encoding, &errors))
return NULL;
v = PyString_AsDecodedObject((PyObject *)self, encoding, errors);
......@@ -3483,7 +3474,7 @@ PyTypeObject PyString_Type = {
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
&string_as_buffer, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
Py_TPFLAGS_BASETYPE, /* tp_flags */
string_doc, /* tp_doc */
0, /* tp_traverse */
......@@ -3636,7 +3627,7 @@ formatfloat(char *buf, size_t buflen, int flags,
len = 1 + 50 + 1 + prec = 52 + prec
If prec=0 the effective precision is 1 (the leading digit is
always given), therefore increase the length by one.
always given), therefore increase the length by one.
*/
if ((type == 'g' && buflen <= (size_t)10 + (size_t)prec) ||
......@@ -4440,7 +4431,7 @@ void _Py_ReleaseInternedStrings(void)
detector, interned strings are not forcibly deallocated; rather, we
give them their stolen references back, and then clear and DECREF
the interned dict. */
fprintf(stderr, "releasing interned strings\n");
n = PyList_GET_SIZE(keys);
for (i = 0; i < n; i++) {
......
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