From c524c5859e7b92b189a6ee0475f0856a71441c3a Mon Sep 17 00:00:00 2001
From: Paul Gilbert
Date: Fri, 9 Nov 2018 20:49:20 -0800
Subject: GLK: Add garglk_unput_string methods

---
 engines/gargoyle/glk.cpp     | 25 +++++++++------------
 engines/gargoyle/glk.h       | 17 +++++++++-----
 engines/gargoyle/streams.cpp | 53 ++++++++++++++++++++++++++++++++++++++++++++
 engines/gargoyle/streams.h   | 20 +++++++++++++++++
 4 files changed, 96 insertions(+), 19 deletions(-)

diff --git a/engines/gargoyle/glk.cpp b/engines/gargoyle/glk.cpp
index d8152428ab..8beca88f2c 100644
--- a/engines/gargoyle/glk.cpp
+++ b/engines/gargoyle/glk.cpp
@@ -1115,39 +1115,36 @@ glsi32 Glk::glk_date_to_simple_time_local(const glkdate_t *date, glui32 factor)
 
 /* XXX non-official Glk functions that may or may not exist */
 
-char *garglk_fileref_get_name(frefid_t fref) {
-	// TODO
-	return nullptr;
+const char *Glk::garglk_fileref_get_name(frefid_t fref) const {
+	return fref->_filename.c_str();
 }
 
 void Glk::garglk_set_program_name(const char *name) {
-	// TODO
+	// Program name isn't displayed
 }
 
 void Glk::garglk_set_program_info(const char *info) {
-	// TODO
+	// Program info isn't displayed
 }
 
 void Glk::garglk_set_story_name(const char *name) {
-	// TODO
+	// Story name isn't displayed
 }
 
 void Glk::garglk_set_story_title(const char *title) {
-	// TODO
+	// Story title isn't displayed
 }
 
 void Glk::garglk_set_config(const char *name) {
-	// TODO
+	// No implementation
 }
 
-/* garglk_unput_string - removes the specified string from the end of the output buffer, if
-* indeed it is there. */
-void Glk::garglk_unput_string(char *str) {
-	// TODO
+void Glk::garglk_unput_string(const char *str) {
+	_streams->getCurrent()->unputBuffer(str, strlen(str));
 }
 
-void Glk::garglk_unput_string_uni(glui32 *str) {
-	// TODO
+void Glk::garglk_unput_string_uni(const glui32 *str) {
+	_streams->getCurrent()->unputBufferUni(str, strlen_uni(str));
 }
 
 void Glk::garglk_set_zcolors(glui32 fg, glui32 bg) {
diff --git a/engines/gargoyle/glk.h b/engines/gargoyle/glk.h
index 7312a35d8e..eb3e68d9a6 100644
--- a/engines/gargoyle/glk.h
+++ b/engines/gargoyle/glk.h
@@ -260,7 +260,7 @@ public:
 	/* XXX non-official Glk functions that may or may not exist */
 	#define GARGLK 1
 
-	char* garglk_fileref_get_name(frefid_t fref);
+	const char *garglk_fileref_get_name(frefid_t fref) const;
 
 	void garglk_set_program_name(const char *name);
 	void garglk_set_program_info(const char *info);
@@ -268,10 +268,17 @@ public:
 	void garglk_set_story_title(const char *title);
 	void garglk_set_config(const char *name);
 
-	/* garglk_unput_string - removes the specified string from the end of the output buffer, if
-	* indeed it is there. */
-	void garglk_unput_string(char *str);
-	void garglk_unput_string_uni(glui32 *str);
+	/**
+	 * Removes the specified string from the end of the output buffer, if
+	 * indeed it is there.
+	 */
+	void garglk_unput_string(const char *str);
+
+	/**
+	 * Removes the specified string from the end of the output buffer, if
+	 * indeed it is there.
+	 */
+	void garglk_unput_string_uni(const glui32 *str);
 
 	void garglk_set_zcolors(glui32 fg, glui32 bg);
 	void garglk_set_zcolors_stream(strid_t str, glui32 fg, glui32 bg);
diff --git a/engines/gargoyle/streams.cpp b/engines/gargoyle/streams.cpp
index 24917c56dd..0f95984046 100644
--- a/engines/gargoyle/streams.cpp
+++ b/engines/gargoyle/streams.cpp
@@ -147,6 +147,59 @@ void WindowStream::putBufferUni(const uint32 *buf, size_t len) {
 		_window->_echoStream->putBufferUni(buf, len);
 }
 
+void WindowStream::unputBuffer(const char *buf, size_t len) {
+	glui32 lx;
+	const char *cx;
+
+	if (!_writable)
+		return;
+
+	if (_window->_lineRequest || _window->_lineRequestUni) {
+		if (g_conf->_safeClicks && g_vm->_events->_forceClick) {
+			_window->cancelLineEvent(nullptr);
+			g_vm->_events->_forceClick = false;
+		} else {
+			warning("unput_buffer: window has pending line request");
+			return;
+		}
+	}
+
+	for (lx = 0, cx = buf + len - 1; lx<len; lx++, cx--) {
+		if (!_window->unputCharUni(*cx))
+			break;
+		_writeCount--;
+	}
+	if (_window->_echoStream)
+		_window->_echoStream->unputBuffer(buf, len);
+}
+
+void WindowStream::unputBufferUni(const glui32 *buf, size_t len) {
+	glui32 lx;
+	const glui32 *cx;
+
+	if (!_writable)
+		return;
+
+	if (_window->_lineRequest || _window->_lineRequestUni) {
+		if (g_conf->_safeClicks && g_vm->_events->_forceClick) {
+			_window->cancelLineEvent(nullptr);
+			g_vm->_events->_forceClick = false;
+		} else {
+			warning("unput_buffer: window has pending line request");
+			return;
+		}
+	}
+
+	for (lx = 0, cx = buf + len - 1; lx<len; lx++, cx--) {
+		if (!_window->unputCharUni(*cx))
+			break;
+		_writeCount--;
+	}
+
+	if (_window->_echoStream)
+		_window->_echoStream->unputBufferUni(buf, len);
+}
+
 void WindowStream::setStyle(glui32 val) {
 	if (!_writable)
 		return;
diff --git a/engines/gargoyle/streams.h b/engines/gargoyle/streams.h
index 16f63dbf0b..02e2f3b7e6 100644
--- a/engines/gargoyle/streams.h
+++ b/engines/gargoyle/streams.h
@@ -191,6 +191,16 @@ public:
 	 */
 	virtual void putBufferUni(const uint32 *buf, size_t len) = 0;
 
+	/**
+	 * Remove a string from the end of the stream, if indeed it is at the end
+	 */
+	virtual void unputBuffer(const char *buf, size_t len) {}
+
+	/**
+	 * Remove a string from the end of the stream, if indeed it is at the end
+	 */
+	virtual void unputBufferUni(const glui32 *buf, size_t len) {}
+
 	/**
 	 * Send a line to the stream with a trailing newline
 	 */
@@ -288,6 +298,16 @@ public:
 	 */
 	virtual void putBufferUni(const uint32 *buf, size_t len) override;
 
+	/**
+	 * Remove a string from the end of the stream, if indeed it is at the end
+	 */
+	virtual void unputBuffer(const char *buf, size_t len) override;
+
+	/**
+	 * Remove a string from the end of the stream, if indeed it is at the end
+	 */
+	virtual void unputBufferUni(const glui32 *buf, size_t len) override;
+
 	virtual void setStyle(glui32 val) override;
 
 	/**
-- 
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