AVALANCHE: Implement file handling in Visa.

2 files changed, 98 insertions, 7 deletions

diff --git a/engines/avalanche/visa2.cpp b/engines/avalanche/visa2.cpp
index e53f55aef4..ea5144f2a9 100644
--- a/engines/avalanche/visa2.cpp
+++ b/engines/avalanche/visa2.cpp
@@ -45,8 +45,8 @@ namespace Avalanche {
 		_vm = vm;
 	}
 
-	const bool Visa::bubbling = false;
-	const bool Visa::report_dixi_errors = true;
+	bool Visa::bubbling = false;
+	bool Visa::report_dixi_errors = true;
 
 	void Visa::unskrimble() {
 		for (uint16  fv = 0; fv < _vm->_gyro.bufsize; fv++) 
@@ -58,13 +58,104 @@ namespace Avalanche {
 		_vm->_gyro.buffer[_vm->_gyro.bufsize] = 2;
 	}
 
-	// File handling.
 	void Visa::dixi(char block, byte point) {
-		warning("STUB: Visa::dixi()");
+		Common::File indexfile, sezfile;
+		uint16 idx_offset, sez_offset;
+		bool error = false;
+
+		if (!indexfile.open("avalot.idx")) {
+			warning("AVALANCHE: Visa: File not found: avalot.idx");
+			return;
+		}
+
+		indexfile.seek((toupper(block) - 65) * 2);
+		idx_offset = indexfile.readUint16LE();
+		if (idx_offset == 0)
+			error = true;
+
+		indexfile.seek(idx_offset + point * 2);
+		sez_offset = indexfile.readUint16LE();
+		if (sez_offset == 0)
+			error = true;
+
+		indexfile.close();
+
+		went_ok = !error;
+
+		if (error) {
+			if (report_dixi_errors) {
+				Common::String todisplay;
+				todisplay.format("%cError accessing scroll %c%s", 7, block, _vm->_gyro.strf(point).c_str());
+				_vm->_scrolls.display(todisplay);
+			}
+			return;
+		}
+
+		if (!sezfile.open("avalot.sez")) {
+			warning("AVALANCHE: Visa: File not found: avalot.sez");
+			return;
+		}
+		sezfile.seek(sez_offset);
+		_vm->_gyro.bufsize = sezfile.readUint16LE();
+		sezfile.read(_vm->_gyro.buffer, _vm->_gyro.bufsize);
+		sezfile.close();
+		unskrimble();
+
+		if (bubbling)  do_the_bubble();
+
+		_vm->_scrolls.calldrivers();
 	}
 
-	// File handling.
 	void Visa::speech(byte who, byte subject) {
+		Common::File indexfile, sezfile;
+		uint16 idx_offset, sez_offset, next_idx_offset;
+
+		if (subject == 0) {
+			/* No subject. */
+
+			bubbling = true;
+			report_dixi_errors = false;
+			dixi('s', who);
+			bubbling = false;
+			report_dixi_errors = true;
+		} else {
+			/* Subject given. */
+
+			went_ok = false; /* Assume that until we know otherwise. */
+
+			if (!indexfile.open("converse.avd")) {
+				warning("AVALANCHE: Visa: File not found: converse.avd");
+				return;
+			}
+
+			indexfile.seek(who * 2 - 2);
+			idx_offset = indexfile.readUint16LE();
+			next_idx_offset = indexfile.readUint16LE();
+
+			if ((idx_offset == 0) || ((((next_idx_offset - idx_offset) / 2) - 1) < subject))  return;
+
+			indexfile.seek(idx_offset + subject * 2);
+			sez_offset = indexfile.readUint16LE();
+			if ((sez_offset == 0) || (indexfile.err()))
+				return;
+			indexfile.close();
+
+			if (!sezfile.open("avalot.sez")) {
+				warning("AVALANCHE: Visa: File not found: avalot.sez");
+				return;
+			}
+			sezfile.seek(sez_offset);
+			_vm->_gyro.bufsize = sezfile.readUint16LE();
+			sezfile.read(_vm->_gyro.buffer, _vm->_gyro.bufsize);
+			sezfile.close();
+
+			unskrimble();
+			do_the_bubble();
+
+			_vm->_scrolls.calldrivers();
+			went_ok = true;
+		}
+
 		warning("STUB: Visa::speech()");
 	}
 
diff --git a/engines/avalanche/visa2.h b/engines/avalanche/visa2.h
index 6749a1dbbd..e33045c374 100644
--- a/engines/avalanche/visa2.h
+++ b/engines/avalanche/visa2.h
@@ -46,8 +46,8 @@ public:
 private:
 	AvalancheEngine *_vm;
 
-	static const bool bubbling;
-	static const bool report_dixi_errors;
+	static bool bubbling;
+	static bool report_dixi_errors;
 
 	bool went_ok;