[v2,0/1] builtin/blame.c: bit field constants into bit shift format

Message

Koji Nakamaru via GitGitGadget Oct. 17, 2019, 5:46 p.m. UTC

we are looking at bitfield constants, and elsewhere in the Git source code,
such cases are handled via bit shift operators rather than octal numbers,
which also makes it easier to spot holes in the range (if, say, 1<<5 was
missing, it is easier to spot it between 1<<4 and 1<<6 than it is to spot a
missing 040 between a 020 and a 0100). Also, bit shifts lead to low-level
optimizations because they require fewer calculations for the CPU. 

Special Thanks to @dscho for helping me out throughout the process.

Hariom Verma (1):
  builtin/blame.c: constants into bit shift format

 builtin/blame.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)


base-commit: 08da6496b61341ec45eac36afcc8f94242763468
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-382%2Fharry-hov%2Fenum-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-382/harry-hov/enum-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/382

Range-diff vs v1:

 1:  3b4b8e0353 ! 1:  838478a185 builtin/blame.c: constants into bit shift format
     @@ -29,18 +29,18 @@
      -#define OUTPUT_LINE_PORCELAIN	01000
      -#define OUTPUT_COLOR_LINE	02000
      -#define OUTPUT_SHOW_AGE_WITH_COLOR	04000
     -+#define OUTPUT_ANNOTATE_COMPAT      (1<<0)
     -+#define OUTPUT_LONG_OBJECT_NAME     (1<<1)
     -+#define OUTPUT_RAW_TIMESTAMP        (1<<2)
     -+#define OUTPUT_PORCELAIN            (1<<3)
     -+#define OUTPUT_SHOW_NAME            (1<<4)
     -+#define OUTPUT_SHOW_NUMBER          (1<<5)
     -+#define OUTPUT_SHOW_SCORE           (1<<6)
     -+#define OUTPUT_NO_AUTHOR            (1<<7)
     -+#define OUTPUT_SHOW_EMAIL           (1<<8)
     -+#define OUTPUT_LINE_PORCELAIN       (1<<9)
     -+#define OUTPUT_COLOR_LINE           (1<<10)
     -+#define OUTPUT_SHOW_AGE_WITH_COLOR  (1<<11)
     ++#define OUTPUT_ANNOTATE_COMPAT      (1U<<0)
     ++#define OUTPUT_LONG_OBJECT_NAME     (1U<<1)
     ++#define OUTPUT_RAW_TIMESTAMP        (1U<<2)
     ++#define OUTPUT_PORCELAIN            (1U<<3)
     ++#define OUTPUT_SHOW_NAME            (1U<<4)
     ++#define OUTPUT_SHOW_NUMBER          (1U<<5)
     ++#define OUTPUT_SHOW_SCORE           (1U<<6)
     ++#define OUTPUT_NO_AUTHOR            (1U<<7)
     ++#define OUTPUT_SHOW_EMAIL           (1U<<8)
     ++#define OUTPUT_LINE_PORCELAIN       (1U<<9)
     ++#define OUTPUT_COLOR_LINE           (1U<<10)
     ++#define OUTPUT_SHOW_AGE_WITH_COLOR  (1U<<11)
       
       static void emit_porcelain_details(struct blame_origin *suspect, int repeat)
       {