moved to folders, updated etc

matcher/README.md

@@ -0,0 +1,14 @@
+Character stream pattern matcher
+================================
+
+Matcher can be used for detecting a pattern in a stream of characters.
+With each incoming character, call `matcher_test()`. 
+
+It will return true if the character completed a match.
+
+Applications
+------------
+
+This buffer was designed for parsing responses to AT commands from ESP8266.
+
+It can be used for any similar purpose.

matcher/matcher.c

@@ -0,0 +1,33 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "matcher.h"
+
+void matcher_reset(matcher_t *m)
+{
+	m->cursor = 0;
+}
+
+
+/** Handle incoming char. Returns true if this char completed the match. */
+bool matcher_test(matcher_t * m, uint8_t b)
+{
+	// If mismatch, rewind (and check at 0)
+	if (m->pattern[m->cursor] != b) {
+		m->cursor = 0;
+	}
+
+	// Check for match
+	if (m->pattern[m->cursor] == b) {
+		// Good char
+		m->cursor++;
+		if (m->pattern[m->cursor] == 0) { // end of pattern
+			m->cursor = 0; // rewind
+			return true; // indicate success
+		}
+	}
+
+	return false;
+}

matcher/matcher.h

@@ -0,0 +1,39 @@
+/**
+ * @file matcher.h
+ * @author Ondřej Hruška, 2016
+ *
+ * String matching utility.
+ * 
+ * Matcher can be used for detecting a pattern in a stream of characters.
+ * With each incoming character, call matcher_test(). 
+ * 
+ * It will return true if the character completed a match.
+ * 
+ * MIT license
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+typedef struct {
+	const char *pattern;
+	size_t cursor;
+} matcher_t;
+
+
+/** reset match progress */
+void matcher_reset(matcher_t *m);
+
+
+/**
+ * Consume an incoming character.
+ * If this char was the last char of the pattern, returns true and resets matcher.
+ *
+ * If the char is not in the pattern, resets matcher.
+ *
+ * @returns true if the char concluded the expected pattern.
+ */
+bool matcher_test(matcher_t * mb, uint8_t b);