diff options
Diffstat (limited to 'cache.c')
| -rw-r--r-- | cache.c | 16 |
1 files changed, 14 insertions, 2 deletions
@@ -2,12 +2,16 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> #include "include/cache.h" #include "include/read_cfg.h" void save_to_cache(int g_hover, int e_hover, int true_hover, char *cfg_name){ FILE *fp; + struct stat cfg_stat; //for determining last modification time of file char *path = get_cache_path(true); //ensure get_cache_path() did not return NULL @@ -20,8 +24,12 @@ void save_to_cache(int g_hover, int e_hover, int true_hover, char *cfg_name){ return; } + //determine last modification time for cfg file + stat(cfg_name, &cfg_stat); + //write to file fwrite(cfg_name, sizeof(char), BUF_LEN, fp); + fwrite(&cfg_stat.st_mtime, sizeof(long int), 1, fp); fwrite(&g_hover, sizeof(int), 1, fp); fwrite(&e_hover, sizeof(int), 1, fp); fwrite(&true_hover, sizeof(int), 1, fp); @@ -34,6 +42,8 @@ void load_cache(int *g_hover, int *e_hover, int *true_hover, char *new_cfg_name) FILE *fp; char *path = get_cache_path(false); char saved_cfg_name[BUF_LEN]; + long int saved_cfg_mtime; + struct stat new_cfg_stat; //ensure get_cache_path() did not return NULL if(path == NULL) return; @@ -45,10 +55,12 @@ void load_cache(int *g_hover, int *e_hover, int *true_hover, char *new_cfg_name) return; } - //check if cfg_name matches; if not, do not load from cache + //check that cfg_name matches and is not newer than the cached cfg; if not, do not load from cache fread(saved_cfg_name, sizeof(char), BUF_LEN, fp); + fread(&saved_cfg_mtime, sizeof(long int), 1, fp); + stat(new_cfg_name, &new_cfg_stat); - if(!(strcmp(saved_cfg_name, new_cfg_name))){ + if(!(strcmp(saved_cfg_name, new_cfg_name)) && saved_cfg_mtime >= new_cfg_stat.st_mtime){ fread(g_hover, sizeof(int), 1, fp); fread(e_hover, sizeof(int), 1, fp); fread(true_hover, sizeof(int), 1, fp); |