diff options
Diffstat (limited to 'src/utils.c')
| -rw-r--r-- | src/utils.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/utils.c b/src/utils.c index b90a9bf..8728dfb 100644 --- a/src/utils.c +++ b/src/utils.c @@ -789,6 +789,16 @@ int check_date(unsigned year, unsigned month, unsigned day) } /* + * Check that a time in seconds is a valid calcurse date (ignoring hour:min:sec). + */ +int check_sec(time_t *time) +{ + struct tm tm; + localtime_r(time, &tm); + return check_date(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday); +} + +/* * Convert a string containing a date into three integers containing the year, * month and day. * @@ -1870,3 +1880,29 @@ int show_dialogs(void) { return (!quiet) && conf.system_dialogs; } + +/* + * Overflow check for addition with positive second term. + */ +int overflow_add(int x, int y, int *z) +{ + if (y < 0) + return 1; + if (INT_MAX - y < x) + return 1; + *z = x + y; + return 0; +} + +/* + * Overflow check for multiplication with positive terms. + */ +int overflow_mul(int x, int y, int *z) +{ + if (x < 0 || y <= 0) + return 1; + if (INT_MAX / y < x) + return 1; + *z = x * y; + return 0; +} |