Added ability to write configuration on SD

MarlinKimbra/cardreader.cpp

@@ -189,7 +189,7 @@ void CardReader::getAbsFilename(char *t) {
     t[0] = 0;
 }
 
-void CardReader::openFile(char* name, bool read, bool replace_current/*=true*/) {
+void CardReader::openFile(char* name, bool read, bool replace_current/*=true*/, bool lcd_status/*=true*/) {
   if (!cardOK) return;
   if (file.isOpen()) { //replacing current file by new file, or subfile call
     if (!replace_current) {
@@ -200,7 +200,6 @@ void CardReader::openFile(char* name, bool read, bool replace_current/*=true*/)
         kill();
         return;
       }
-
       SERIAL_ECHO_START;
       SERIAL_ECHOPGM("SUBROUTINE CALL target:\"");
       SERIAL_ECHO(name);
@@ -282,7 +281,7 @@ void CardReader::openFile(char* name, bool read, bool replace_current/*=true*/)
 
       SERIAL_PROTOCOLLNPGM(MSG_SD_FILE_SELECTED);
       getfilename(0, fname);
-      lcd_setstatus(longFilename[0] ? longFilename : fname);
+      if(lcd_status) lcd_setstatus(longFilename[0] ? longFilename : fname);
     }
     else {
       SERIAL_PROTOCOLPGM(MSG_SD_OPEN_FILE_FAIL);
@@ -291,16 +290,16 @@ void CardReader::openFile(char* name, bool read, bool replace_current/*=true*/)
     }
   }
   else { //write
-    if (!file.open(curDir, fname, O_CREAT | O_APPEND | O_WRITE | O_TRUNC)) {
-      SERIAL_PROTOCOLPGM(MSG_SD_OPEN_FILE_FAIL);
-      SERIAL_PROTOCOL(fname);
-      SERIAL_PROTOCOLCHAR('.');
-    }
-    else {
+    if (file.open(curDir, fname, O_CREAT | O_APPEND | O_WRITE | O_TRUNC)) {
       saving = true;
       SERIAL_PROTOCOLPGM(MSG_SD_WRITE_TO_FILE);
       SERIAL_PROTOCOLLN(name);
-      lcd_setstatus(fname);
+      if(lcd_status) lcd_setstatus(fname);
+    }
+    else {
+      SERIAL_PROTOCOLPGM(MSG_SD_OPEN_FILE_FAIL);
+      SERIAL_PROTOCOL(fname);
+      SERIAL_PROTOCOLCHAR('.');
     }
   }
 }
@@ -432,7 +431,7 @@ void CardReader::checkautostart(bool force) {
     autostart_index++;
 }
 
-void CardReader::closefile(bool store_location) {
+void CardReader::closeFile(bool store_location) {
   file.sync();
   file.close();
   saving = logging = false;
@@ -443,6 +442,94 @@ void CardReader::closefile(bool store_location) {
   }
 }
 
+void CardReader::parseKeyLine(char *key, char *value, int &len_k, int &len_v) {
+  if (!cardOK || !isFileOpen()) return;
+  int ln_buf = 0;
+  char ln_char;
+  bool ln_space = false, ln_ignore = false, key_found = false;
+  while(!eof()) {		//READ KEY
+    ln_char = (char)get();
+    if(ln_char == '\n') {
+      ln_buf = 0;
+      ln_ignore = false;  //We've reached a new line try to find a key again
+      continue;
+    }
+    if(ln_ignore) continue;
+    if(ln_char == ' ') {
+      ln_space = true;
+      continue;
+    }
+    if(ln_char == '=') {
+      key[ln_buf] = '\0';
+      len_k = ln_buf;
+      key_found = true;
+      break; //key finded and buffered
+    }
+    if(ln_char == ';' || ln_buf+1 >= len_k || ln_space && ln_buf > 0) { //comments on key is not allowd. Also key len can't be longer than len_k or contain spaces. Stop buffering and try the next line
+      ln_ignore = true;
+      continue;
+    }
+    ln_space = false;
+    key[ln_buf] = ln_char;
+    ln_buf++;
+  }
+  if(!key_found) { //definitly there isn't no more key that can be readed in the file
+    key[0] = '\0';
+    value[0] = '\0';
+    len_k = 0;
+    len_v = 0;
+    return;
+  }
+  ln_buf = 0;
+  ln_ignore = false;
+  while(!eof()) {		//READ VALUE
+    ln_char = (char)get();
+	  if(ln_char == '\n') {
+      value[ln_buf] = '\0';
+      len_v = ln_buf;
+      break;	//new line reached, we can stop
+    }
+    if(ln_ignore|| ln_char == ' ' && ln_buf == 0) continue; //ignore also initial spaces of the value
+    if(ln_char == ';' || ln_buf+1 >= len_v) { //comments reached or value len longer than len_v. Stop buffering and go to the next line.
+      ln_ignore = true;
+      continue;
+    }
+    value[ln_buf] = ln_char;
+    ln_buf++;
+  }
+}
+
+void CardReader::unparseKeyLine(const char *key, char *value) {
+  if (!cardOK || !isFileOpen()) return;
+  file.writeError = false;
+  file.write(key);
+  if (file.writeError) {
+    SERIAL_ERROR_START;
+    SERIAL_ERRORLNPGM(MSG_SD_ERR_WRITE_TO_FILE);
+    return;
+  }
+  file.writeError = false;
+  file.write("=");
+  if (file.writeError) {
+    SERIAL_ERROR_START;
+    SERIAL_ERRORLNPGM(MSG_SD_ERR_WRITE_TO_FILE);
+    return;
+  }
+  file.writeError = false;
+  file.write(value);
+  if (file.writeError) {
+    SERIAL_ERROR_START;
+    SERIAL_ERRORLNPGM(MSG_SD_ERR_WRITE_TO_FILE);
+    return;
+  }
+  file.writeError = false;
+  file.write("\n");
+  if (file.writeError) {
+    SERIAL_ERROR_START;
+    SERIAL_ERRORLNPGM(MSG_SD_ERR_WRITE_TO_FILE);
+  }
+}
+
 /**
  * Get the name of a file in the current directory by index
  */