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Derived from Martin's SF patch 110609: support unbounded ints in %d,i,u,x,X,o formats.

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Note a curious extension to the std C rules:  x, X and o formatting can never produce
a sign character in C, so the '+' and ' ' flags are meaningless for them.  But
unbounded ints *can* produce a sign character under these conversions (no fixed-
width bitstring is wide enough to hold all negative values in 2's-comp form).  So
these flags become meaningful in Python when formatting a Python long which is too
big to fit in a C long.  This required shuffling around existing code, which hacked
x and X conversions to death when both the '#' and '0' flags were specified:  the
hacks weren't strong enough to deal with the simultaneous possibility of the ' ' or
'+' flags too, since signs were always meaningless before for x and X conversions.
Isomorphic shuffling was required in unicodeobject.c.
Also added dozens of non-trivial new unbounded-int test cases to test_format.py.
This commit is contained in:
Tim Peters 2000-09-21 05:43:11 +00:00
parent 31575ce817
commit 38fd5b6413
4 changed files with 409 additions and 75 deletions
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2
Include/stringobject.h
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@ -59,6 +59,8 @@ extern DL_IMPORT(void) PyString_Concat(PyObject **, PyObject *);
extern DL_IMPORT(void) PyString_ConcatAndDel(PyObject **, PyObject *);
extern DL_IMPORT(int) _PyString_Resize(PyObject **, int);
extern DL_IMPORT(PyObject *) PyString_Format(PyObject *, PyObject *);
extern DL_IMPORT(PyObject *) _PyString_FormatLong(PyObject*, int, int,
int, char**, int*);
#ifdef INTERN_STRINGS
extern DL_IMPORT(void) PyString_InternInPlace(PyObject **);