aqhome-react: peridocally write vars.

aqhome/data/vars_dbwrite.c

@@ -13,14 +13,17 @@
 
 
 #include "./vars_p.h"
-#include "./vars_dbread.h"
+#include "./vars_dbwrite.h"
 #include "aqhome/data/path.h"
 
 #include <gwenhywfar/misc.h>
 #include <gwenhywfar/text.h>
+#include <gwenhywfar/syncio.h>
 #include <gwenhywfar/debug.h>
 
 #include <ctype.h>
+#include <stdio.h>
+#include <errno.h>
 
 
 
@@ -52,6 +55,48 @@ static void _appendEscapedString(const char *s, GWEN_BUFFER *dbuf);
 
 
 
+int AQH_Vars_WriteDbFile(const AQH_VARS *vt, const char *filename)
+{
+  int rv;
+  GWEN_BUFFER *fbuf;
+  GWEN_BUFFER *dbuf;
+
+  fbuf=GWEN_Buffer_new(0, 256, 0, 1);
+  GWEN_Buffer_AppendString(fbuf, filename);
+  GWEN_Buffer_AppendString(fbuf, ".tmp");
+
+  dbuf=GWEN_Buffer_new(0, 256, 0, 1);
+  rv=AQH_Vars_WriteDbFormat(vt, dbuf);
+  if (rv<0) {
+    DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
+    GWEN_Buffer_free(dbuf);
+    GWEN_Buffer_free(fbuf);
+    return rv;
+  }
+
+  rv=GWEN_SyncIo_Helper_WriteFile(GWEN_Buffer_GetStart(fbuf),
+                                  (const uint8_t*) GWEN_Buffer_GetStart(dbuf),
+                                  GWEN_Buffer_GetUsedBytes(dbuf));
+  if (rv<0) {
+    DBG_INFO(AQH_LOGDOMAIN, "here (%d)", rv);
+    GWEN_Buffer_free(dbuf);
+    GWEN_Buffer_free(fbuf);
+    return rv;
+  }
+  GWEN_Buffer_free(dbuf);
+
+  if (rename(GWEN_Buffer_GetStart(fbuf), filename)) {
+    DBG_INFO(AQH_LOGDOMAIN, "here (%d: %s)", errno, strerror(errno));
+    GWEN_Buffer_free(fbuf);
+    return GWEN_ERROR_IO;
+  }
+  GWEN_Buffer_free(fbuf);
+
+  return 0;
+}
+
+
+
 int AQH_Vars_WriteDbFormat(const AQH_VARS *vt, GWEN_BUFFER *dbuf)
 {
   if (vt && dbuf) {

aqhome/data/vars_dbwrite.h

@@ -14,6 +14,7 @@
 #include <aqhome/data/vars.h>
 
 
+AQHOME_API int AQH_Vars_WriteDbFile(const AQH_VARS *vt, const char *filename);
 AQHOME_API int AQH_Vars_WriteDbFormat(const AQH_VARS *vt, GWEN_BUFFER *dbuf);