Added menu location caching

1 files changed, 87 insertions, 0 deletions

diff --git a/unix/cache.c b/unix/cache.c
new file mode 100644
index 0000000..af18077
--- /dev/null
+++ b/unix/cache.c
@@ -0,0 +1,87 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.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;
+	char path[BUF_LEN];
+
+	char *home = getenv("HOME");
+
+	if(home == NULL){
+		printf("Failed to save cache data: HOME is not set\n");
+		return;
+	}
+
+	sprintf(path, "%s%c.cache%c", home, sep, sep);
+	mkdir(path, 0755);
+
+	sprintf(path, "%s%c.cache%ctml%c", home, sep, sep, sep);
+	mkdir(path, 0755);
+
+	sprintf(path, "%s%c.cache%ctml%cdata.bin", home, sep, sep, sep);
+
+	//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;
+	}
+
+	//write to file
+	fwrite(&g_hover, sizeof(int), 1, fp);
+	fwrite(&e_hover, sizeof(int), 1, fp);
+	fwrite(&true_hover, sizeof(int), 1, fp);
+	fwrite(cfg_name, sizeof(char), BUF_LEN, fp);
+
+	fclose(fp);
+	return;
+}
+
+void load_cache(int *g_hover, int *e_hover, int *true_hover, char *new_cfg_name){
+	FILE *fp;
+	char path[BUF_LEN];
+	char saved_cfg_name[BUF_LEN];
+
+	char *home = getenv("HOME");
+
+	if(home == NULL){
+		printf("Failed to load cached data: HOME is not set\n");
+		return;
+	}
+
+	sprintf(path, "%s%c.cache%ctml%cdata.bin", home, sep, sep, sep);
+
+	//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 if cfg_name matches; if not, do not load from cache
+	fseek(fp, sizeof(int) * 3, SEEK_SET);
+	fread(saved_cfg_name, sizeof(char), BUF_LEN, fp);
+
+	if(!(strcmp(saved_cfg_name, new_cfg_name))){
+		fseek(fp, 0, SEEK_SET);
+		fread(g_hover, sizeof(int), 1, fp);
+		fread(e_hover, sizeof(int), 1, fp);
+		fread(true_hover, sizeof(int), 1, fp);
+	}
+
+	else{
+		*g_hover = 0;
+		*e_hover = 0;
+		*true_hover = 0;
+	}
+
+	fclose(fp);
+	return;
+}