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Wrap code to advance to next specified weekday in a macro.

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This commit is contained in:
Dianne Skoll
2021-04-13 12:08:20 -04:00
parent 34409f7a7d
commit 6adfd2e739
1 changed files with 20 additions and 19 deletions
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39
src/trigger.c
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@@ -24,6 +24,8 @@
#define GOT_YR 4
#define GOT_WD 8
#define ADVANCE_TO_WD(x) while (! (trig->wd & (1 << ((x)%7)))) (x)++
static int JYear(int jul);
static int JMonth(int jul);
static int NextSimpleTrig(int startdate, Trigger *trig, int *err);
@@ -59,8 +61,7 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
switch(typ) {
case 0:
case GOT_WD:
if (trig->wd != NO_WD)
while(! (trig->wd & (1 << (startdate%7)))) startdate++;
if (trig->wd != NO_WD) ADVANCE_TO_WD(startdate);
return startdate;
case GOT_DAY:
@@ -121,19 +122,19 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
if (y > trig->y) return -1;
if (y < trig->y) j = Julian(trig->y, 0, 1);
else j = startdate;
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (JYear(j) > trig->y) return -1;
return j;
case GOT_MON+GOT_WD:
if (m == trig->m) {
j = startdate;
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (JMonth(j) == trig->m) return j;
}
if (m >= trig->m) j = Julian(y+1, trig->m, 1);
else j = Julian(y, trig->m, 1);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
return j; /* Guaranteed to be within the month */
case GOT_DAY+GOT_WD:
@@ -144,7 +145,7 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
/* If there are fewer days in previous month, no match */
if (trig->d <= DaysInMonth(m2, y2)) {
j = Julian(y2, m2, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (j >= startdate) return j;
}
@@ -153,7 +154,7 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
/* Try this month */
if (trig->d <= DaysInMonth(m, y)) {
j = Julian(y, m, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (j >= startdate) return j;
}
@@ -162,18 +163,18 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
if (m2 > 11) { m2 = 0; y++; }
while (trig->d > DaysInMonth(m2, y)) m2++;
j = Julian(y, m2, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
return j;
case GOT_WD+GOT_YR+GOT_DAY:
if (y > trig->y+1 || (y > trig->y && m>0)) return -1;
if (y > trig->y) {
j = Julian(trig->y, 11, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (j >= startdate) return j;
} else if (y < trig->y) {
j = Julian(trig->y, 0, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
return j;
} else {
/* Try last month */
@@ -181,14 +182,14 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
m2 = m-1;
while (trig->d > DaysInMonth(m2, trig->y)) m2--;
j = Julian(trig->y, m2, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (j >= startdate) return j;
}
}
/* Try this month */
if (trig->d <= DaysInMonth(m, trig->y)) {
j = Julian(trig->y, m, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (j >= startdate) return j;
}
@@ -197,7 +198,7 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
m++;
while (trig->d > DaysInMonth(m, trig->d)) m++;
j = Julian(trig->y, m, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
return j;
case GOT_DAY+GOT_MON+GOT_WD:
@@ -215,31 +216,31 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
/* Try last year */
j = Julian(y, trig->m, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (j >= startdate) return j;
/* Try this year */
y++;
j = Julian(y, trig->m, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
if (j >= startdate) return j;
/* Must be next year */
y++;
while (trig->d > DaysInMonth(trig->m, y)) y++;
j = Julian(y, trig->m, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
return j;
case GOT_WD+GOT_MON+GOT_YR:
if (y > trig->y || (y == trig->y && m > trig->m)) return -1;
if (trig->y > y || (trig->y == y && trig->m > m)) {
j = Julian(trig->y, trig->m, 1);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
return j;
} else {
j = startdate;
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
FromJulian(j, &y2, &m2, &d2);
if (m2 == trig->m) return j; else return -1;
}
@@ -250,7 +251,7 @@ static int NextSimpleTrig(int startdate, Trigger *trig, int *err)
return -1;
}
j = Julian(trig->y, trig->m, trig->d);
while(! (trig->wd & (1 << (j%7)))) j++;
ADVANCE_TO_WD(j);
return j;
default: