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-rwxr-xr-xsrc/utils.c101
1 files changed, 60 insertions, 41 deletions
diff --git a/src/utils.c b/src/utils.c
index 243de4c..63f3320 100755
--- a/src/utils.c
+++ b/src/utils.c
@@ -1,4 +1,4 @@
-/* $calcurse: utils.c,v 1.86 2010/11/04 10:55:07 fleischer Exp $ */
+/* $calcurse: utils.c,v 1.87 2011/01/11 22:10:48 fleischer Exp $ */
/*
* Calcurse - text-based organizer
@@ -47,6 +47,8 @@
#include "calcurse.h"
+#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
+
/* General routine to exit calcurse properly. */
void
exit_calcurse (int status)
@@ -883,64 +885,81 @@ erase_note (char **note, enum eraseflg flag)
/*
* Convert a string containing a date into three integers containing the year,
* month and day.
+ *
+ * If a pointer to a date structure containing the current date is passed as
+ * last parameter ("slctd_date"), the function will accept several short forms,
+ * e.g. "26" for the 26th of the current month/year or "3/1" for Mar 01 (or Jan
+ * 03, depending on the date format) of the current year. If a null pointer is
+ * passed, short forms won't be accepted at all.
+ *
* Returns 1 if sucessfully converted or 0 if the string is an invalid date.
*/
int
parse_date (char *date_string, enum datefmt datefmt, int *year, int *month,
- int *day)
+ int *day, struct date *slctd_date)
{
- int in1, in2, in3;
- int lyear, lmonth, lday;
+ char sep = (datefmt == DATEFMT_ISO) ? '-' : '/';
+ char *p;
+ int in[3] = {0, 0, 0}, n = 0;
+ int d, m, y;
- if (date_string == 0)
- return 0;
+ if (!date_string) return 0;
- if (datefmt == DATEFMT_ISO)
- {
- if (sscanf (date_string, "%d - %d - %d", &in1, &in2, &in3) < 3)
- return 0;
+ /* parse string into in[], read up to three integers */
+ for (p = date_string; *p; p++) {
+ if (*p == sep) {
+ if ((++n) > 2) return 0;
}
- else
- {
- if (sscanf (date_string, "%d / %d / %d", &in1, &in2, &in3) < 3)
- return 0;
+ else if ((*p >= '0') && (*p <= '9')) {
+ in[n] = in[n] * 10 + (int)(*p - '0');
}
- switch (datefmt)
- {
+ else
+ return 0;
+ }
+
+ if ((!slctd_date && n < 2) || in[n] == 0) return 0;
+
+ /* convert into day, month and year, depending on the date format */
+ switch (datefmt) {
case DATEFMT_MMDDYYYY:
- lmonth = in1;
- lday = in2;
- lyear = in3;
+ m = in[n > 0 ? 0 : 1];
+ d = in[n > 0 ? 1 : 0];
+ y = in[2];
break;
case DATEFMT_DDMMYYYY:
- lday = in1;
- lmonth = in2;
- lyear = in3;
+ d = in[0];
+ m = in[1];
+ y = in[2];
break;
case DATEFMT_YYYYMMDD:
- case DATEFMT_ISO:
- lyear = in1;
- lmonth = in2;
- lday = in3;
+ case DATEFMT_ISO:
+ y = in[0];
+ m = in[n - 1];
+ d = in[n];
break;
default:
return 0;
- }
-
- if (lyear < 1 || lyear > 9999
- || lmonth < 1 || lmonth > 12
- || lday < 1 || lday > 31)
+ }
+
+ if (y > 0 && y < 100) {
+ /* convert "YY" format into "YYYY" */
+ y += slctd_date->yyyy - slctd_date->yyyy % 100;
+ }
+ else if (n < 2) {
+ /* set year and, optionally, month if short from is used */
+ y = slctd_date->yyyy;
+ if (n < 1) m = slctd_date->mm;
+ }
+
+ /* check if date is valid, take leap years into account */
+ if (y < 1902 || y > 2037 || m < 1 || m > 12 || d < 1 ||
+ d > days[m - 1] + (m == 2 && isleap (y)) ? 1 : 0)
return 0;
-
- if (year != NULL)
- *year = lyear;
-
- if (month != NULL)
- *month = lmonth;
-
- if (day != NULL)
- *day = lday;
-
+
+ if (year) *year = y;
+ if (month) *month = m;
+ if (day) *day = d;
+
return 1;
}