[core] Move arduino/ files to cores/

cores/common/base/lt_api.c

@@ -0,0 +1,65 @@
+/* Copyright (c) Kuba Szczodrzyński 2022-04-29. */
+
+#include "LibreTuyaAPI.h"
+
+String ipToString(const IPAddress &ip) {
+	char szRet[16];
+	sprintf(szRet, "%hhu.%hhu.%hhu.%hhu", ip[0], ip[1], ip[2], ip[3]);
+	return String(szRet);
+}
+
+/**
+ * @brief Generate random bytes using rand().
+ *
+ * @param buf destination pointer
+ * @param len how many bytes to generate
+ */
+extern "C" {
+void lt_rand_bytes(uint8_t *buf, size_t len) {
+	int *data = (int *)buf;
+	size_t i;
+	for (i = 0; len >= sizeof(int); len -= sizeof(int)) {
+		data[i++] = rand();
+	}
+	if (len) {
+		int rem				= rand();
+		unsigned char *pRem = (unsigned char *)&rem;
+		memcpy(buf + i * sizeof(int), pRem, len);
+	}
+}
+
+#undef putchar
+
+/**
+ * @brief Print data pointed to by buf in hexdump-like format (hex+ASCII).
+ *
+ * @param buf source pointer
+ * @param len how many bytes to print
+ * @param offset increment printed offset by this value
+ * @param width how many bytes on a line
+ */
+void hexdump(const uint8_t *buf, size_t len, uint32_t offset, uint8_t width) {
+	uint16_t pos = 0;
+	while (pos < len) {
+		// print hex offset
+		printf("%06x ", offset + pos);
+		// calculate current line width
+		uint8_t lineWidth = min(width, len - pos);
+		// print hexadecimal representation
+		for (uint8_t i = 0; i < lineWidth; i++) {
+			if (i % 8 == 0) {
+				printf(" ");
+			}
+			printf("%02x ", buf[pos + i]);
+		}
+		// print ascii representation
+		printf(" |");
+		for (uint8_t i = 0; i < lineWidth; i++) {
+			char c = buf[pos + i];
+			putchar((c >= 0x20 && c <= 0x7f) ? c : '.');
+		}
+		puts("|\r");
+		pos += lineWidth;
+	}
+}
+}