Mercurial > molko
changeset 185:7103d6574062
core: add nrand function
| author | David Demelier <markand@malikania.fr> |
|---|---|
| date | Tue, 03 Nov 2020 18:13:40 +0100 |
| parents | c92957c3b82b |
| children | f37b8e95aaaa |
| files | libcore/core/core.c libcore/core/util.c libcore/core/util.h |
| diffstat | 3 files changed, 28 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/libcore/core/core.c Mon Nov 02 18:35:44 2020 +0100 +++ b/libcore/core/core.c Tue Nov 03 18:13:40 2020 +0100 @@ -16,12 +16,18 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#include <stddef.h> +#include <stdlib.h> +#include <time.h> + #include "core.h" #include "sys.h" bool core_init(void) { + srand(time(NULL)); + return sys_init(); }
--- a/libcore/core/util.c Mon Nov 02 18:35:44 2020 +0100 +++ b/libcore/core/util.c Tue Nov 03 18:13:40 2020 +0100 @@ -16,6 +16,9 @@ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ +#include <assert.h> +#include <stdlib.h> + #include <SDL.h> #include "util.h" @@ -25,3 +28,11 @@ { SDL_Delay(ms); } + +unsigned int +nrand(unsigned int lower, unsigned int upper) +{ + assert(upper <= RAND_MAX); + + return (rand() % (upper - lower + 1)) + lower; +}
--- a/libcore/core/util.h Mon Nov 02 18:35:44 2020 +0100 +++ b/libcore/core/util.h Tue Nov 03 18:13:40 2020 +0100 @@ -51,4 +51,15 @@ void delay(unsigned int ms); +/** + * Generate a random number between lower and upper (included). + * + * \pre upper must be <= RAND_MAX + * \param lower the lower bound + * \param upper the upper bound + * \return The generated number. + */ +unsigned int +nrand(unsigned int lower, unsigned int upper); + #endif /* !MOLKO_UTIL_H */