Introduce a wrapper Q_fopen() and replace fopen() with it.

On Unix platforms unicode is implemented through UTF-8 which is
transparent for applications. But on Windows a UTF-16 dialect is
used which needs alteration at application side. This wrapper is
another step to unicode support on Windows, now we can replace
fopen() by a function that converts our internal UTF-8 pathes to
Windows UTF-16 dialect.

This is a noop for Unix platforms. The Windows build is broken,
the compiler errors out in shared.h. This will be fixed in a
later commit.

Caveats:
* fopen() calls in 3rd party code (std_* and unzip) are not replaced.
  This may become a problem. We need to check that.
* In the Unix specific code fopen() isn't replaced since it's not
  necessayry.

src/backends/generic/vid.c

@@ -284,7 +284,7 @@ void VID_WriteScreenshot( int width, int height, int comp, const void* data )
 	{
 		FILE *f;
 		Com_sprintf(checkname, sizeof(checkname), "%s/scrnshot/q2_%04d.%s", gameDir, i, supportedFormats[format]);
-		f = fopen(checkname, "rb");
+		f = Q_fopen(checkname, "rb");
 
 		if (!f)
 		{

src/client/cl_console.c

@@ -165,7 +165,7 @@ Con_Dump_f(void)
 
 	Com_Printf("Dumped console text to %s.\n", name);
 	FS_CreatePath(name);
-	f = fopen(name, "w");
+	f = Q_fopen(name, "w");
 
 	if (!f)
 	{

src/client/cl_download.c

@@ -477,7 +477,7 @@ CL_CheckOrDownloadFile(char *filename)
 	   not opened yet */
 	CL_DownloadFileName(name, sizeof(name), cls.downloadtempname);
 
-	fp = fopen(name, "r+b");
+	fp = Q_fopen(name, "r+b");
 
 	if (fp)
 	{
@@ -587,7 +587,7 @@ CL_ParseDownload(void)
 
 		FS_CreatePath(name);
 
-		cls.download = fopen(name, "wb");
+		cls.download = Q_fopen(name, "wb");
 
 		if (!cls.download)
 		{

src/client/cl_keyboard.c

@@ -837,7 +837,7 @@ Key_WriteConsoleHistory()
 		Com_sprintf(path, sizeof(path), "%sconsole_history.txt", Sys_GetHomeDir());
 	}
 
-	FILE* f = fopen(path, "w");
+	FILE* f = Q_fopen(path, "w");
 
 	if(f==NULL)
 	{
@@ -884,7 +884,7 @@ Key_ReadConsoleHistory()
 		Com_sprintf(path, sizeof(path), "%sconsole_history.txt", Sys_GetHomeDir());
 	}
 
-	FILE* f = fopen(path, "r");
+	FILE* f = Q_fopen(path, "r");
 	if(f==NULL)
 	{
 		Com_DPrintf("Opening console history %s for reading failed!\n", path);

src/client/cl_main.c

@@ -178,7 +178,7 @@ CL_Record_f(void)
 
 	Com_Printf("recording to %s.\n", name);
 	FS_CreatePath(name);
-	cls.demofile = fopen(name, "wb");
+	cls.demofile = Q_fopen(name, "wb");
 
 	if (!cls.demofile)
 	{
@@ -604,7 +604,7 @@ CL_WriteConfiguration(void)
 
 	Com_sprintf(path, sizeof(path), "%s/config.cfg", FS_Gamedir());
 
-	f = fopen(path, "w");
+	f = Q_fopen(path, "w");
 
 	if (!f)
 	{

src/common/clientserver.c

@@ -144,12 +144,12 @@ Com_VPrintf(int print_level, const char *fmt, va_list argptr)
 
 				if (logfile_active->value > 2)
 				{
-					logfile = fopen(name, "a");
+					logfile = Q_fopen(name, "a");
 				}
 
 				else
 				{
-					logfile = fopen(name, "w");
+					logfile = Q_fopen(name, "w");
 				}
 			}
 

src/common/cvar.c

@@ -501,7 +501,7 @@ Cvar_WriteVariables(char *path)
 	char buffer[1024];
 	FILE *f;
 
-	f = fopen(path, "a");
+	f = Q_fopen(path, "a");
 
 	for (var = cvar_vars; var; var = var->next)
 	{

src/common/filesystem.c

@@ -389,7 +389,7 @@ FS_FOpenFile(const char *name, fileHandle_t *f, qboolean gamedir_only)
 					{
 						/* PAK */
 						file_from_pak = true;
-						handle->file = fopen(pack->name, "rb");
+						handle->file = Q_fopen(pack->name, "rb");
 
 						if (handle->file)
 						{
@@ -428,12 +428,12 @@ FS_FOpenFile(const char *name, fileHandle_t *f, qboolean gamedir_only)
 			/* Search in a directory tree. */
 			Com_sprintf(path, sizeof(path), "%s/%s", search->path, handle->name);
 
-			handle->file = fopen(path, "rb");
+			handle->file = Q_fopen(path, "rb");
 
 			if (!handle->file)
 			{
 				Q_strlwr(path);
-				handle->file = fopen(path, "rb");
+				handle->file = Q_fopen(path, "rb");
 			}
 
 			if (!handle->file)
@@ -668,7 +668,7 @@ FS_LoadPAK(const char *packPath)
 	dpackheader_t header; /* PAK file header. */
 	dpackfile_t info[MAX_FILES_IN_PACK]; /* PAK info. */
 
-	handle = fopen(packPath, "rb");
+	handle = Q_fopen(packPath, "rb");
 
 	if (handle == NULL)
 	{

src/common/frame.c

@@ -342,7 +342,7 @@ Qcommon_Frame(int msec)
 				log_stats_file = 0;
 			}
 
-			log_stats_file = fopen("stats.log", "w");
+			log_stats_file = Q_fopen("stats.log", "w");
 
 			if (log_stats_file)
 			{

src/common/header/shared.h

@@ -254,6 +254,16 @@ int Q_strlcat(char *dst, const char *src, int size);
 
 /* ============================================= */
 
+/* Unicode wrappers around fopen(). */
+
+#ifdef _WIN32
+#error "Not implemented yet"
+#else
+#define Q_fopen(file, mode) fopen(file, mode)
+#endif
+
+/* ============================================= */
+
 short BigShort(short l);
 short LittleShort(short l);
 int BigLong(int l);

src/game/g_svcmds.c

@@ -293,7 +293,7 @@ SVCmd_WriteIP_f(void)
 
 	gi.cprintf(NULL, PRINT_HIGH, "Writing %s.\n", name);
 
-	f = fopen(name, "wb");
+	f = Q_fopen(name, "wb");
 
 	if (!f)
 	{

src/game/savegame/savegame.c

@@ -772,7 +772,7 @@ WriteGame(const char *filename, qboolean autosave)
 		SaveClientData();
 	}
 
-	f = fopen(filename, "wb");
+	f = Q_fopen(filename, "wb");
 
 	if (!f)
 	{
@@ -824,7 +824,7 @@ ReadGame(const char *filename)
 
 	gi.FreeTags(TAG_GAME);
 
-	f = fopen(filename, "rb");
+	f = Q_fopen(filename, "rb");
 
 	if (!f)
 	{
@@ -980,7 +980,7 @@ WriteLevel(const char *filename)
 	edict_t *ent;
 	FILE *f;
 
-	f = fopen(filename, "wb");
+	f = Q_fopen(filename, "wb");
 
 	if (!f)
 	{
@@ -1071,7 +1071,7 @@ ReadLevel(const char *filename)
 	int i;
 	edict_t *ent;
 
-	f = fopen(filename, "rb");
+	f = Q_fopen(filename, "rb");
 
 	if (!f)
 	{

src/server/sv_cmd.c

@@ -509,7 +509,7 @@ SV_ServerRecord_f(void)
 
 	Com_Printf("recording to %s.\n", name);
 	FS_CreatePath(name);
-	svs.demofile = fopen(name, "wb");
+	svs.demofile = Q_fopen(name, "wb");
 
 	if (!svs.demofile)
 	{

src/server/sv_init.c

@@ -141,7 +141,7 @@ SV_CheckForSavegame(void)
 
 	Com_sprintf(name, sizeof(name), "%s/save/current/%s.sav",
 			FS_Gamedir(), sv.name);
-	f = fopen(name, "rb");
+	f = Q_fopen(name, "rb");
 
 	if (!f)
 	{

src/server/sv_save.c

@@ -80,14 +80,14 @@ CopyFile(char *src, char *dst)
 
 	Com_DPrintf("CopyFile (%s, %s)\n", src, dst);
 
-	f1 = fopen(src, "rb");
+	f1 = Q_fopen(src, "rb");
 
 	if (!f1)
 	{
 		return;
 	}
 
-	f2 = fopen(dst, "wb");
+	f2 = Q_fopen(dst, "wb");
 
 	if (!f2)
 	{
@@ -168,7 +168,7 @@ SV_WriteLevelFile(void)
 
 	Com_sprintf(name, sizeof(name), "%s/save/current/%s.sv2",
 				FS_Gamedir(), sv.name);
-	f = fopen(name, "wb");
+	f = Q_fopen(name, "wb");
 
 	if (!f)
 	{
@@ -224,7 +224,7 @@ SV_WriteServerFile(qboolean autosave)
 	Com_DPrintf("SV_WriteServerFile(%s)\n", autosave ? "true" : "false");
 
 	Com_sprintf(name, sizeof(name), "%s/save/current/server.ssv", FS_Gamedir());
-	f = fopen(name, "wb");
+	f = Q_fopen(name, "wb");
 
 	if (!f)
 	{
@@ -367,7 +367,7 @@ SV_Loadgame_f(void)
 	/* make sure the server.ssv file exists */
 	Com_sprintf(name, sizeof(name), "%s/save/%s/server.ssv",
 				FS_Gamedir(), Cmd_Argv(1));
-	f = fopen(name, "rb");
+	f = Q_fopen(name, "rb");
 
 	if (!f)
 	{