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author | Sami Kerola | 2013-04-27 23:51:35 +0200 |
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committer | Sami Kerola | 2013-05-26 10:59:18 +0200 |
commit | 3b66dfd6bb4abe6304c366809f4b9613fdc62eab (patch) | |
tree | 7565b82a19876fd94ac7a1beb373b00043e21dd3 /misc-utils/cal.c | |
parent | cal: fix preprocessor directive indendation (diff) | |
download | kernel-qcow2-util-linux-3b66dfd6bb4abe6304c366809f4b9613fdc62eab.tar.gz kernel-qcow2-util-linux-3b66dfd6bb4abe6304c366809f4b9613fdc62eab.tar.xz kernel-qcow2-util-linux-3b66dfd6bb4abe6304c366809f4b9613fdc62eab.zip |
cal: convert function like definitions to functions
Reviewed-by: Thomas Bächler <thomas@archlinux.org>
Reviewed-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Diffstat (limited to 'misc-utils/cal.c')
-rw-r--r-- | misc-utils/cal.c | 45 |
1 files changed, 28 insertions, 17 deletions
diff --git a/misc-utils/cal.c b/misc-utils/cal.c index 13830deec..e6dd92f51 100644 --- a/misc-utils/cal.c +++ b/misc-utils/cal.c @@ -209,23 +209,6 @@ char j_day_headings[J_WEEK_LEN*6+1]; /* weekstart = 1 => " M Tu W Th F S S " */ const char *full_month[12]; -/* leap year -- account for gregorian reformation in 1752 */ -#define leap_year(yr) \ - ((yr) <= 1752 ? !((yr) % 4) : \ - (!((yr) % 4) && ((yr) % 100)) || !((yr) % 400)) - -/* number of centuries since 1700, not inclusive */ -#define centuries_since_1700(yr) \ - ((yr) > 1700 ? (yr) / 100 - 17 : 0) - -/* number of centuries since 1700 whose modulo of 400 is 0 */ -#define quad_centuries_since_1700(yr) \ - ((yr) > 1600 ? ((yr) - 1600) / 400 : 0) - -/* number of leap years between year 1 and this year, not inclusive */ -#define leap_years_since_year_1(yr) \ - ((yr) / 4 - centuries_since_1700(yr) + quad_centuries_since_1700(yr)) - /* 0 => sunday, 1 => monday */ int weekstart=0; int julian; @@ -239,6 +222,9 @@ struct fmt_st char s[FMT_ST_LINES][FMT_ST_CHARS]; }; +static int leap_year(int year); +static int centuries_since_1700(int year, int centuries); +static int leap_years_since_year_1(int year); char * ascii_day(char *, int); int center_str(const char* src, char* dest, size_t dest_size, size_t width); void center(const char *, size_t, int); @@ -413,6 +399,31 @@ main(int argc, char **argv) { return EXIT_SUCCESS; } +/* leap year -- account for gregorian reformation in 1752 */ +static int leap_year(int year) +{ + if (year <= 1752) + return !(year % 4); + else + return ( !(year % 4) && (year % 100) ) || !(year % 400); +} + +/* number of centuries since 1700 */ +static int centuries_since_1700(int year, int n) +{ + if (year < 1700) + return 0; + else + return ((year / (100 * n)) - (17 / n)); +} + +/* number of leap years between year 1 and this year, not inclusive */ +static int leap_years_since_year_1(int year) +{ + return (year / 4 - centuries_since_1700(year, 1) + + centuries_since_1700(year, 4)); +} + void headers_init(void) { int i, wd; |