added exemplary storing of last read page

reader.lua

@@ -96,6 +96,14 @@ if optarg["G"] ~= nil then
 end
 
 doc = pdf.openDocument(ARGV[optind], optarg["p"] or "")
+docdb, errno, errstr = sqlite3.open(ARGV[optind]..".kpdfview")
+if docdb == nil then
+	print(errstr)
+else
+	docdb:exec("CREATE TABLE IF NOT EXISTS settings (key TEXT PRIMARY KEY, value TEXT);")
+	stmt_readsetting = docdb:prepare("SELECT value FROM settings WHERE key = ?;")
+	stmt_savesetting = docdb:prepare("INSERT OR REPLACE INTO settings (key, value) VALUES (?, ?);")
+end
 
 print("pdf has "..doc:getPages().." pages.")
 
@@ -104,6 +112,25 @@ width, height = fb:getSize()
 
 nulldc = pdf.newDC()
 
+function readsetting(key)
+	if docdb ~= nil then
+		stmt_readsetting:reset()
+		stmt_readsetting:bind_values(key)
+		result = stmt_readsetting:step()
+		if result == sqlite3.ROW then
+			return stmt_readsetting:get_value(0)
+		end
+	end
+end
+
+function savesetting(key, value)
+	if docdb ~= nil then
+		stmt_savesetting:reset()
+		stmt_savesetting:bind_values(key, value)
+		stmt_savesetting:step()
+	end
+end
+
 function setzoom(page, cacheslot)
 	local dc = pdf.newDC()
 	local pwidth, pheight = page:getSize(nulldc)
@@ -239,6 +266,10 @@ function mainloop()
 					goto(pageno - 1)
 				end
 			elseif ev.code == KEY_BACK then
+				if docdb ~= nil then
+					savesetting("last_page", pageno)
+					docdb:close()
+				end
 				return
 			elseif ev.code == KEY_VPLUS then
 				modify_gamma( 1.25 )
@@ -318,6 +349,6 @@ function mainloop()
 	end
 end
 
-goto(tonumber(optarg["g"]) or 1)
+goto(tonumber(optarg["g"]) or tonumber(readsetting("last_page") or 1))
 
 mainloop()