From 965f5f58082ae33ca26282a0b4e17383711c4308 Mon Sep 17 00:00:00 2001
From: nishi <nishi@d4a5a174-5a4a-5b4b-b672-37683c10d7d5>
Date: Mon, 20 May 2024 05:54:09 +0000
Subject: [PATCH] add mtime field

git-svn-id: file:///raid/svn-main/nishi-dataworks/trunk@42 d4a5a174-5a4a-5b4b-b672-37683c10d7d5
---
 Client/main.c      |  7 ++++++-
 Library/database.c | 20 ++++++++++++++------
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/Client/main.c b/Client/main.c
index 0160e4c..0280ac3 100644
--- a/Client/main.c
+++ b/Client/main.c
@@ -34,6 +34,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 #ifdef __MINGW32__
 #include <windows.h>
@@ -118,7 +119,11 @@ int main(int argc, char** argv) {
 		printf("Bad database file or non-existent.\n");
 		return 1;
 	}
-	printf("Opened the database (Version %d).\n", dataworks_database_get_version(db));
+	time_t mtime = (time_t)dataworks_database_get_mtime(db);
+	struct tm* tm = localtime(&mtime);
+	char mtimestr[256];
+	strftime(mtimestr, 255, "%a %b %d %H:%M:%S %Z %Y", tm);
+	printf("Opened the database (Version %d, Modified at %s).\n", dataworks_database_get_version(db), mtimestr);
 	printf("\n");
 	printf("Type a command (.help) for the help\n");
 	printf("\n");
diff --git a/Library/database.c b/Library/database.c
index c27d2db..8a1f1ab 100644
--- a/Library/database.c
+++ b/Library/database.c
@@ -34,6 +34,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 
 const char sig[3] = {0x7f, 'D', 'W'};
 
@@ -48,6 +49,8 @@ int dataworks_database_create(const char* fname) {
 	nul[0] = 0;
 	nul[1] = 1;
 	fwrite(nul, 1, 2, f);
+	uint64_t t = time(NULL);
+	__dw_big_endian(t, uint64_t, fwrite(__converted_ptr, 1, 8, f));
 	for(i = 0; i < 4096; i++) nul[i] = 0;
 	for(i = 0; i < 256; i++) {
 		fwrite(nul, 1, 1, f);
@@ -72,23 +75,28 @@ struct dataworks_db* dataworks_database_open(const char* fname) {
 		return NULL;
 	}
 	__dw_lockfile(fp);
-	char ptrver[2];
+	char ptrver[8];
 	fread(ptrver, 1, 2, fp);
 	uint16_t be_ver = *(uint16_t*)(char*)ptrver;
 	uint16_t ver;
 	__dw_native_endian(be_ver, uint16_t, ver = __converted);
+	fread(ptrver, 1, 8, fp);
+	uint64_t be_mtime = *(uint64_t*)(char*)ptrver;
+	uint64_t mtime;
+	__dw_native_endian(be_mtime, uint64_t, mtime = __converted);
 	__dw_unlockfile(fp);
-	if(ver == 1){
+	if(ver == 1) {
 		struct dataworks_db* db = malloc(sizeof(*db));
 		db->fp = fp;
 		db->version = ver;
+		db->mtime = mtime;
 		return db;
-	}else{
+	} else {
 		fclose(fp);
 		return NULL;
 	}
 }
 
-int dataworks_database_get_version(struct dataworks_db* db){
-	return db->version;
-}
+int dataworks_database_get_version(struct dataworks_db* db) { return db->version; }
+
+uint64_t dataworks_database_get_mtime(struct dataworks_db* db) { return db->mtime; }
-- 
2.43.0