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#include <stdbool.h>
#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_count, int g_hover, int *e_hover, int *e_offset, 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);
int i;
//ensure get_cache_path() did not return NULL
if(path == NULL) return;
//open cache file for writing
fp = fopen(path, "wb");
if(fp == NULL){
printf("Failed to save cache data: could not open \"%s\"\n", path);
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_count, sizeof(int), 1, fp);
fwrite(&g_hover, sizeof(int), 1, fp);
for(i = 0; i < g_count; ++i){
fwrite(&(e_hover[i]), sizeof(int), 1, fp);
fwrite(&(e_offset[i]), sizeof(int), 1, fp);
}
fwrite(&true_hover, sizeof(int), 1, fp);
fclose(fp);
return;
}
void load_cache(int g_count, int *g_hover, int **e_hover, int **e_offset, 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;
int saved_g_count;
int i;
//ensure get_cache_path() did not return NULL
if(path == NULL) return;
//open cache file for reading
fp = fopen(path, "rb");
if(fp == NULL){
printf("Failed to load cached data: could not open \"%s\"\n", path);
return;
}
//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)) && saved_cfg_mtime >= new_cfg_stat.st_mtime){
fread(&saved_g_count, sizeof(int), 1, fp);
if(saved_g_count == g_count){
fread(g_hover, sizeof(int), 1, fp);
for(i = 0; i < g_count; ++i){
fread(&(*e_hover)[i], sizeof(int), 1, fp);
fread(&(*e_offset)[i], sizeof(int), 1, fp);
}
fread(true_hover, sizeof(int), 1, fp);
}
}
fclose(fp);
return;
}
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