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Fix for SF bug #415514: "%#x" % 0 caused assertion failure/abort.

Browse source 
http://sourceforge.net/tracker/index.php?func=detail&aid=415514&group_id=5470&atid=105470
For short ints, Python defers to the platform C library to figure out what
%#x should do.  The code asserted that the platform C returned a string
beginning with "0x".  However, that's not true when-- and only when --the
*value* being formatted is 0.  Changed the code to live with C's inconsistency
here.  In the meantime, the problem does not arise if you format a long 0 (0L)
instead.  However, that's because the code *we* wrote to do %#x conversions on
longs produces a leading "0x" regardless of value.  That's probably wrong too:
we should drop leading "0x", for consistency with C, when (& only when) formatting
0L.  So I changed the long formatting code to do that too.
This commit is contained in:
Tim Peters 2001-04-12 00:35:51 +00:00
parent 4642cb9ac9
commit 711088d9b8
3 changed files with 53 additions and 25 deletions
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23
Objects/unicodeobject.c
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@ -5081,16 +5081,17 @@ PyObject *PyUnicode_Format(PyObject *format,
}
if ((flags & F_ALT) && (c == 'x' || c == 'X')) {
assert(pbuf[0] == '0');
assert(pbuf[1] == c);
if (fill != ' ') {
*res++ = *pbuf++;
*res++ = *pbuf++;
if (pbuf[1] == c) {
if (fill != ' ') {
*res++ = *pbuf++;
*res++ = *pbuf++;
}
rescnt -= 2;
width -= 2;
if (width < 0)
width = 0;
len -= 2;
}
rescnt -= 2;
width -= 2;
if (width < 0)
width = 0;
len -= 2;
}
if (width > len && !(flags & F_LJUST)) {
do {
@ -5101,9 +5102,9 @@ PyObject *PyUnicode_Format(PyObject *format,
if (fill == ' ') {
if (sign)
*res++ = sign;
if ((flags & F_ALT) && (c == 'x' || c == 'X')) {
if ((flags & F_ALT) && (c == 'x' || c == 'X') &&
pbuf[1] == c) {
assert(pbuf[0] == '0');
assert(pbuf[1] == c);
*res++ = *pbuf++;
*res++ = *pbuf++;
}