Add Charmonizer macro for converting uint64_t to double
Project: http://git-wip-us.apache.org/repos/asf/lucy/repo Commit: http://git-wip-us.apache.org/repos/asf/lucy/commit/29339c45 Tree: http://git-wip-us.apache.org/repos/asf/lucy/tree/29339c45 Diff: http://git-wip-us.apache.org/repos/asf/lucy/diff/29339c45 Branch: refs/heads/msvc6 Commit: 29339c457e2929252bd5b7419bd2116c28fdb928 Parents: 94be23f Author: Nick Wellnhofer <[email protected]> Authored: Sat Nov 10 17:33:02 2012 +0100 Committer: Nick Wellnhofer <[email protected]> Committed: Sat Nov 10 17:33:02 2012 +0100 ---------------------------------------------------------------------- charmonizer/src/Charmonizer/Probe/Integers.c | 35 +++++++++++++++++++++ 1 files changed, 35 insertions(+), 0 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/lucy/blob/29339c45/charmonizer/src/Charmonizer/Probe/Integers.c ---------------------------------------------------------------------- diff --git a/charmonizer/src/Charmonizer/Probe/Integers.c b/charmonizer/src/Charmonizer/Probe/Integers.c index f18e808..2e75c36 100644 --- a/charmonizer/src/Charmonizer/Probe/Integers.c +++ b/charmonizer/src/Charmonizer/Probe/Integers.c @@ -60,6 +60,17 @@ static const char chaz_Integers_literal64_code[] = CHAZ_QUOTE( return 0; ) CHAZ_QUOTE( } ); +static const char chaz_Integers_u64_to_double_code[] = + CHAZ_QUOTE( #include "_charm.h" ) + CHAZ_QUOTE( int main() ) + CHAZ_QUOTE( { ) + CHAZ_QUOTE( unsigned __int64 int_num = 0; ) + CHAZ_QUOTE( double float_num; ) + CHAZ_QUOTE( Charm_Setup; ) + CHAZ_QUOTE( float_num = (double)int_num; ) + CHAZ_QUOTE( return 0; ) + CHAZ_QUOTE( } ); + void chaz_Integers_run(void) { char *output; @@ -79,6 +90,7 @@ chaz_Integers_run(void) { int has___int64 = false; int has_inttypes = chaz_HeadCheck_check_header("inttypes.h"); int has_stdint = chaz_HeadCheck_check_header("stdint.h"); + int can_convert_u64_to_double = true; char i32_t_type[10]; char i32_t_postfix[10]; char u32_t_postfix[10]; @@ -200,6 +212,15 @@ chaz_Integers_run(void) { } } + /* Determine whether conversion of unsigned __int64 to double works */ + if (has___int64) { + output = chaz_CC_capture_output(chaz_Integers_u64_to_double_code, + &output_len); + if (output == NULL) { + can_convert_u64_to_double = false; + } + } + /* Write out some conditional defines. */ if (has_inttypes) { chaz_ConfWriter_add_def("HAS_INTTYPES_H", NULL); @@ -387,6 +408,20 @@ chaz_Integers_run(void) { } } + /* Create macro for converting uint64_t to double. */ + if (can_convert_u64_to_double) { + chaz_ConfWriter_add_def("U64_TO_DOUBLE(num)", + "((double)(num))"); + } + else { + chaz_ConfWriter_add_def( + "U64_TO_DOUBLE(num)", + "((num) & CHY_U64_C(0x8000000000000000) ? " + "(double)(int64_t)((num) & CHY_U64_C(0x7FFFFFFFFFFFFFFF)) + " + "9223372036854775808.0 : " + "(double)(int64_t)(num))"); + } + /* True and false. */ chaz_ConfWriter_append_conf( "#ifndef true\n"
