Add data migration test.

1 files changed, 22 insertions, 20 deletions

diff --git a/c/data.h b/c/data.h
index 4e25251..e584442 100644
--- a/c/data.h
+++ b/c/data.h
@@ -5,27 +5,29 @@
 #include "util.h"
 #include "wcharptr.h"
 
-/* ElvData and DlvData are written as-is to disk; note the careful
- * alignment. */
+/* ElvDataA and DlvDataA are written as-is to disk; note the careful
+ * alignment. As such, they should be regarded as immutable. If the
+ * format needs to be changed in the future, then new structs called
+ * ElvDataB and DlvDataB should be added. */
 
-struct ElvData
+struct ElvDataA
 {
-	unsigned char version = 'a';	/* 0-1 */
-	unsigned char rating = 0;	/* 1-2 */
-	unsigned char bWatched = 0;	/* 2-3 */
-	unsigned char bTVOriginal = 0;	/* 3-4 */
-	wchar_t sRating[4] = {0};	/* 4-12 */
-	wchar_t siEp[6] = {0};		/* 12-24 */
-	wchar_t title[128] = {0};	/* 24-280 */
+	unsigned char version = 'a';
+	unsigned char rating = 0;
+	unsigned char bWatched = 0;
+	unsigned char bTVOriginal = 0;
+	wchar_t sRating[4] = {0};
+	wchar_t siEp[6] = {0};
+	wchar_t title[128] = {0};
 };
 
-struct DlvData
+struct DlvDataA
 {
-	wchar_t date[64] = {0};
-	wchar_t source[64] = {0};
-	wchar_t screenwriter[64] = {0};
+	wchar_t date[32] = {0};
+	wchar_t source[48] = {0};
+	wchar_t screenwriter[48] = {0};
 	wchar_t hint[128] = {0};
-	wchar_t wiki[128] = {0};
+	wchar_t wiki[192] = {0};
 };
 
 struct FileView
@@ -39,10 +41,10 @@ struct FileView
 	/* TODO: Handle exceptions on read and write... */
 };
 
-void Write(unsigned char* buf, const ElvData& e);
-ElvData* Read(unsigned char* buf);
+void Write(unsigned char* buf, const ElvDataA& e);
+ElvDataA* Read(unsigned char* buf);
 
-inline int FromWeb(const int iEp, ElvData& e, DlvData& d) noexcept
+inline int FromWeb(const int iEp, ElvDataA& e, DlvDataA& d) noexcept
 {
 	WcharPtr title, wiki, date, source, hint;
 	const int r = Pl("episode_data","fetch_episode_data",iEp,&title,&wiki,&date,&source,&hint);
@@ -54,7 +56,7 @@ inline int FromWeb(const int iEp, ElvData& e, DlvData& d) noexcept
 	return r;
 }
 
-inline bool FromProlog(const int iEp, ElvData& e) noexcept
+inline bool FromProlog(const int iEp, ElvDataA& e) noexcept
 {
 	if (WcharPtr title; Pl("episode_data","episode_title",iEp,&title))
 		Wcscpy(e.title, title);
@@ -75,7 +77,7 @@ inline bool FromProlog(const int iEp, ElvData& e) noexcept
 	return true;
 }
 
-inline void FromProlog(const int iEp, DlvData& d) noexcept
+inline void FromProlog(const int iEp, DlvDataA& d) noexcept
 {
 	if (WcharPtr wiki; Pl("episode_data","episode_wiki",iEp,&wiki))
 		Wcscpy(d.wiki, wiki);