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Use temporary int objects to access struct tm members 

Call _M_extract_* functions family through temporary int objects, so
it doesn't convert from lvalue to rvalue through a temporary in AVR
because of the incompatible types used in AVR-Libc.

This fixes compilation errors with AVR-Libc while compiling libstdc++
for AVR target.

2017-01-10  Felipe Magno de Almeida <felipe@expertisesolutions.com.br>

	* include/bits/locale_facets_nonio.tcc
	(time_get::_M_extract_via_format): Avoid compilation errors with
	non-standard struct tm.

From-SVN: r244271
This commit is contained in:
Felipe Magno de Almeida 2017-01-10 14:15:59 +00:00 committed by Jonathan Wakely
parent 79fc8ffe6c
commit 26b67e383f
2 changed files with 38 additions and 12 deletions
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6
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,9 @@
2017-01-10 Felipe Magno de Almeida <felipe@expertisesolutions.com.br>
* include/bits/locale_facets_nonio.tcc
(time_get::_M_extract_via_format): Avoid compilation errors with
non-standard struct tm.
2017-01-10 François Dumont <fdumont@gcc.gnu.org>
Jonathan Wakely <jwakely@redhat.com>

44
libstdc++-v3/include/bits/locale_facets_nonio.tcc
View File

@ -659,30 +659,38 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
// Abbreviated weekday name [tm_wday]
const char_type* __days1[7];
__tp._M_days_abbreviated(__days1);
__beg = _M_extract_name(__beg, __end, __tm->tm_wday, __days1,
__beg = _M_extract_name(__beg, __end, __mem, __days1,
7, __io, __tmperr);
if (!__tmperr)
__tm->tm_wday = __mem;
break;
case 'A':
// Weekday name [tm_wday].
const char_type* __days2[7];
__tp._M_days(__days2);
__beg = _M_extract_name(__beg, __end, __tm->tm_wday, __days2,
__beg = _M_extract_name(__beg, __end, __mem, __days2,
7, __io, __tmperr);
if (!__tmperr)
__tm->tm_wday = __mem;
break;
case 'h':
case 'b':
// Abbreviated month name [tm_mon]
const char_type* __months1[12];
__tp._M_months_abbreviated(__months1);
__beg = _M_extract_name(__beg, __end, __tm->tm_mon,
__beg = _M_extract_name(__beg, __end, __mem,
__months1, 12, __io, __tmperr);
if (!__tmperr)
__tm->tm_mon = __mem;
break;
case 'B':
// Month name [tm_mon].
const char_type* __months2[12];
__tp._M_months(__months2);
__beg = _M_extract_name(__beg, __end, __tm->tm_mon,
__beg = _M_extract_name(__beg, __end, __mem,
__months2, 12, __io, __tmperr);
if (!__tmperr)
__tm->tm_mon = __mem;
break;
case 'c':
// Default time and date representation.
@ -693,18 +701,22 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
break;
case 'd':
// Day [01, 31]. [tm_mday]
__beg = _M_extract_num(__beg, __end, __tm->tm_mday, 1, 31, 2,
__beg = _M_extract_num(__beg, __end, __mem, 1, 31, 2,
__io, __tmperr);
if (!__tmperr)
__tm->tm_mday = __mem;
break;
case 'e':
// Day [1, 31], with single digits preceded by
// space. [tm_mday]
if (__ctype.is(ctype_base::space, *__beg))
__beg = _M_extract_num(++__beg, __end, __tm->tm_mday, 1, 9,
__beg = _M_extract_num(++__beg, __end, __mem, 1, 9,
1, __io, __tmperr);
else
__beg = _M_extract_num(__beg, __end, __tm->tm_mday, 10, 31,
__beg = _M_extract_num(__beg, __end, __mem, 10, 31,
2, __io, __tmperr);
if (!__tmperr)
__tm->tm_mday = __mem;
break;
case 'D':
// Equivalent to %m/%d/%y.[tm_mon, tm_mday, tm_year]
@ -715,13 +727,17 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
break;
case 'H':
// Hour [00, 23]. [tm_hour]
__beg = _M_extract_num(__beg, __end, __tm->tm_hour, 0, 23, 2,
__beg = _M_extract_num(__beg, __end, __mem, 0, 23, 2,
__io, __tmperr);
if (!__tmperr)
__tm->tm_hour = __mem;
break;
case 'I':
// Hour [01, 12]. [tm_hour]
__beg = _M_extract_num(__beg, __end, __tm->tm_hour, 1, 12, 2,
__beg = _M_extract_num(__beg, __end, __mem, 1, 12, 2,
__io, __tmperr);
if (!__tmperr)
__tm->tm_hour = __mem;
break;
case 'm':
// Month [01, 12]. [tm_mon]
@ -732,8 +748,10 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
break;
case 'M':
// Minute [00, 59]. [tm_min]
__beg = _M_extract_num(__beg, __end, __tm->tm_min, 0, 59, 2,
__beg = _M_extract_num(__beg, __end, __mem, 0, 59, 2,
__io, __tmperr);
if (!__tmperr)
__tm->tm_min = __mem;
break;
case 'n':
if (__ctype.narrow(*__beg, 0) == '\n')
@ -752,11 +770,13 @@ _GLIBCXX_END_NAMESPACE_LDBL_OR_CXX11
// Seconds. [tm_sec]
// [00, 60] in C99 (one leap-second), [00, 61] in C89.
#if _GLIBCXX_USE_C99
__beg = _M_extract_num(__beg, __end, __tm->tm_sec, 0, 60, 2,
__beg = _M_extract_num(__beg, __end, __mem, 0, 60, 2,
#else
__beg = _M_extract_num(__beg, __end, __tm->tm_sec, 0, 61, 2,
__beg = _M_extract_num(__beg, __end, __mem, 0, 61, 2,
#endif
__io, __tmperr);
if (!__tmperr)
__tm->tm_sec = __mem;
break;
case 't':
if (__ctype.narrow(*__beg, 0) == '\t')