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authorPete Batard <pete@akeo.ie>2020-07-24 17:37:42 +0100
committermergify[bot] <37929162+mergify[bot]@users.noreply.github.com>2020-08-03 11:58:15 +0000
commitbbb8a818583853ec4bb7804e78ed1d304b709d33 (patch)
treeebd9d8194a61af7a7a65130d8c783468eb879741 /EmbeddedPkg/Include
parente557442e3f7ec7bee2d886978bbd259c6d68c75a (diff)
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EmbeddedPkg/TimeBaseLib: Add macros to get build year/month/day
These can be used, for instance, to automate the population of an SMBIOS Type 0 BIOS Release Date when building a UEFI firmware (which is how we plan to use these macros for the Raspberry Pi platform). These macros should work for any compiler that follows ISO/IEC 9899, but we add a check for the compiler we have tested to be on the safe side. Note that we decided against adding a #error or #warn for compilers that haven't been validated, as we don't want to introduce breakage for people who may already be using the header with something else than gcc, MSVC or Clang. Instead, we expect those to send a patch that adds their compiler to the list, once they have tested the macros there. Signed-off-by: Pete Batard <pete@akeo.ie> Reviewed-by: Leif Lindholm <leif@nuviainc.com>
Diffstat (limited to 'EmbeddedPkg/Include')
-rw-r--r--EmbeddedPkg/Include/Library/TimeBaseLib.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/EmbeddedPkg/Include/Library/TimeBaseLib.h b/EmbeddedPkg/Include/Library/TimeBaseLib.h
index 4103c89b38..ee2f191d98 100644
--- a/EmbeddedPkg/Include/Library/TimeBaseLib.h
+++ b/EmbeddedPkg/Include/Library/TimeBaseLib.h
@@ -12,6 +12,38 @@
#include <Uefi/UefiBaseType.h>
+//
+// Convenience macros to obtain a build date
+//
+// These macros should work for any compiler that follows ISO/IEC 9899,
+// in which case __DATE__ is defined as a "Mmm dd yyyy" 11 chars string,
+// but add an explicit filter for compilers that have been validated.
+//
+#if (defined(__GNUC__) || defined(_MSC_VER) || defined(__clang__))
+#define TIME_BUILD_YEAR (__DATE__[7] == '?' ? 1900 \
+ : (((__DATE__[7] - '0') * 1000 ) \
+ + (__DATE__[8] - '0') * 100 \
+ + (__DATE__[9] - '0') * 10 \
+ + __DATE__[10] - '0'))
+#define TIME_BUILD_MONTH ( __DATE__ [2] == '?' ? 1 \
+ : __DATE__ [2] == 'n' ? ( \
+ __DATE__ [1] == 'a' ? 1 : 6) \
+ : __DATE__ [2] == 'b' ? 2 \
+ : __DATE__ [2] == 'r' ? ( \
+ __DATE__ [0] == 'M' ? 3 : 4) \
+ : __DATE__ [2] == 'y' ? 5 \
+ : __DATE__ [2] == 'l' ? 7 \
+ : __DATE__ [2] == 'g' ? 8 \
+ : __DATE__ [2] == 'p' ? 9 \
+ : __DATE__ [2] == 't' ? 10 \
+ : __DATE__ [2] == 'v' ? 11 \
+ : 12)
+#define TIME_BUILD_DAY ( __DATE__[4] == '?' ? 1 \
+ : ((__DATE__[4] == ' ' ? 0 : \
+ ((__DATE__[4] - '0') * 10)) \
+ + __DATE__[5] - '0'))
+#endif
+
// Define EPOCH (1970-JANUARY-01) in the Julian Date representation
#define EPOCH_JULIAN_DATE 2440588