From 06ea81fdb29a99ce199f6ae29b15c7e167459d56 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Fri, 21 Jul 2017 20:23:26 -0400
Subject: [PATCH] Made sure that unrecognised waves don't block the symbol
 queue, and allowed any type of nonsense to be skipped before finding a byte.

---
 Storage/Tape/Parsers/ZX8081.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Storage/Tape/Parsers/ZX8081.cpp b/Storage/Tape/Parsers/ZX8081.cpp
index 0ad025d5f..68d3fc4b1 100644
--- a/Storage/Tape/Parsers/ZX8081.cpp
+++ b/Storage/Tape/Parsers/ZX8081.cpp
@@ -58,6 +58,11 @@ void Parser::inspect_waves(const std::vector<WaveType> &waves) {
 		return;
 	}
 
+	if(waves[0] == WaveType::Unrecognised) {
+		push_symbol(SymbolType::Unrecognised, 1);
+		return;
+	}
+
 	if(waves.size() >= 4) {
 		size_t wave_offset = 0;
 		// If the very first thing is a gap, swallow it.
@@ -92,14 +97,18 @@ void Parser::inspect_waves(const std::vector<WaveType> &waves) {
 int Parser::get_next_byte(const std::shared_ptr<Storage::Tape::Tape> &tape) {
 	int c = 8;
 	int result = 0;
-	while(c--) {
+	while(c) {
 		if(is_at_end(tape)) return -1;
+
 		SymbolType symbol = get_next_symbol(tape);
 		if(symbol != SymbolType::One && symbol != SymbolType::Zero) {
+			if(c == 8) continue;
 			return_symbol(symbol);
 			return -1;
 		}
+
 		result = (result << 1) | (symbol == SymbolType::One ? 1 : 0);
+		c--;
 	}
 	return result;
 }