add webserver components, some webserver fices and improvements in templating, add real time history chart

2020-01-07 00:21:27 +01:00
parent ed53611e0f
commit ef7866a29f
50 changed files with 3594 additions and 2 deletions
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2010 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef BASE16_H_
+#define BASE16_H_
+
+#include <stdint.h>
+#include <string.h>
+
+/**
+ * Calculate length of base16-encoded data
+ * @param raw_len Raw data length
+ * @return Encoded string length (excluding NUL)
+ */
+static inline size_t base16_encoded_len(size_t raw_len) {
+	return (2 * raw_len);
+}
+
+/**
+ * Calculate maximum length of base16-decoded string
+ * @param encoded Encoded string
+ * @return Maximum length of raw data
+ */
+static inline size_t base16_decoded_max_len(const char *encoded) {
+	return ((strlen(encoded) + 1) / 2);
+}
+
+/**
+ * Base16-encode data
+ *
+ * The buffer must be the correct length for the encoded string.  Use
+ * something like
+ *
+ *     char buf[ base16_encoded_len ( len ) + 1 ];
+ *
+ * (the +1 is for the terminating NUL) to provide a buffer of the
+ * correct size.
+ *
+ * @param raw Raw data
+ * @param len Length of raw data
+ * @param encoded Buffer for encoded string
+ */
+extern void base16_encode(uint8_t *raw, size_t len, char *encoded);
+
+/**
+ * Base16-decode data
+ *
+ * The buffer must be large enough to contain the decoded data.  Use
+ * something like
+ *
+ *     char buf[ base16_decoded_max_len ( encoded ) ];
+ *
+ * to provide a buffer of the correct size.
+ * @param encoded Encoded string
+ * @param raw Raw data
+ * @return Length of raw data, or negative error
+ */
+extern int base16_decode(const char *encoded, uint8_t *raw);
+
+#endif /* BASE16_H_ */