First pass at parsing MEMLIST.BIN!

anotherplan_tests.c

@@ -1,42 +1,9 @@
 #include <u.h>
 #include <libc.h>
-#include <draw.h>
-#include <bio.h>
-#include <mach.h>
-
-/* TODO: What'd I tell you about that coupling? */
-Point ballPos = {40, 40};
+#include "memlist.h"
 
 void main(void)
 {
-	char filename[] = "assets/BANK01";
-	int fd = open(filename, OREAD);
-	if ( !fd ) {
-		exits("couldn't open the file!");
-	}
-
-	Dir *filestats = dirfstat(fd);
-	if ( filestats == nil ) {
-		exits("couldn't fstat the file!");
-	}
-	vlong filesize = filestats->length;
-	print("\"%s\" has size %lld.\n", filename, filesize);
-	free(filestats);
-
-	if ( !machbyname("68020") ) {
-		exits("libmach doesn't support \"68020\" architecture.");
-	}
-	Map *bankmap = newmap(nil, 1);
-	if (bankmap == nil) {
-		exits("couldn't allocate a new map.");
-	}
-	setmap(bankmap, fd, 0, filesize, 0, "bankmap");
-	ulong readval = 0;
-	int result = get4(bankmap, 0, &readval);
-	print("get4() returned %d and read 0x%08lx.\n", result, readval);
-	if (fd) {
-		close(fd);
-	}
-	free(bankmap);
+	loadmemlist("assets/MEMLIST.BIN");
 	exits(nil);
 }

memlist.c

@@ -0,0 +1,57 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <mach.h>
+#include "memlist.h"
+
+void
+loadmemlist(char *filename)
+{
+	int fd = open(filename, OREAD);
+	if ( !fd ) {
+		exits("couldn't open the file!");
+	}
+
+	Dir *filestats = dirfstat(fd);
+	if ( filestats == nil ) {
+		exits("couldn't fstat the file!");
+	}
+	vlong filesize = filestats->length;
+	print("\"%s\" has size %lld.\n", filename, filesize);
+	free(filestats);
+
+	if ( !machbyname("68020") ) {
+		exits("libmach doesn't support \"68020\" architecture.");
+	}
+	Map *bankmap = newmap(nil, 1);
+	if (bankmap == nil) {
+		exits("couldn't allocate a new map.");
+	}
+	setmap(bankmap, fd, 0, filesize, 0, "memlist");
+
+	uvlong offset = 0;
+	for ( uint assetno = 0; assetno < 10; assetno++ ) {
+		Asset readAsset = {0};
+		get1(bankmap, offset, (uchar*)  &readAsset.state,     1); offset += 1;
+		get1(bankmap, offset, (uchar*)  &readAsset.type,      1); offset += 1; offset += 4;
+		get1(bankmap, offset, (uchar*)  &readAsset.rank,      1); offset += 1;
+		get1(bankmap, offset, (uchar*)  &readAsset.bank,      1); offset += 1;
+		get4(bankmap, offset, (ulong*)  &readAsset.bankoffset  ); offset += 4; offset += 2;
+		get2(bankmap, offset, (ushort*) &readAsset.packedlength); offset += 2; offset += 2;
+		get2(bankmap, offset, (ushort*) &readAsset.length      ); offset += 2;
+		USED(offset); /* this is stupid */
+		print("--[asset %d]--\n", assetno);
+		print("state:  0x%02X.\n", readAsset.state);
+		print("type:   0x%02X.\n", readAsset.type);
+		print("rank:   0x%02X.\n", readAsset.rank);
+		print("bank:   0x%02X.\n", readAsset.bank);
+		print("offset: %lld.\n",    readAsset.bankoffset);
+		print("packed: %d.\n",     readAsset.packedlength);
+		print("length: %d.\n",     readAsset.length);
+	}
+
+	if (fd) {
+		close(fd);
+	}
+	free(bankmap);
+}

memlist.h

@@ -0,0 +1,32 @@
+#ifndef MEMLIST_H
+#define MEMLIST_H
+
+typedef enum AssetState_t {
+	ASSET_NOT_NEEDED = 0,
+	ASSET_LOADED     = 1,
+	ASSET_UNLOADED   = 2,
+	ASSET_END        = 255,
+} AssetState;
+
+typedef enum AssetType_t {
+	ASSET_SOUND    = 0,
+	ASSET_MUSIC    = 1,
+	ASSET_FRAME    = 2,
+	ASSET_PALETTE  = 3,
+	ASSET_BYTECODE = 4,
+	ASSET_VIDEO    = 5,
+} AssetType;
+
+typedef struct Asset_t {
+	AssetState state;
+	AssetType  type;
+	uchar *    data;
+	uchar      rank;
+	uchar      bank;
+	uvlong     bankoffset;
+	ushort     packedlength;
+	ushort     length;
+} Asset;
+
+void loadmemlist(char *filename);
+#endif /* MEMLIST_H */

mkfile

@@ -2,9 +2,11 @@
 TARG=anotherplan anotherplan_tests
 OFILES=\
 	graphics.$O\
+	memlist.$O\
 
 HFILES=\
 	graphics.h\
+	memlist.h\
 
 BIN=/$objtype/bin/games
 </sys/src/cmd/mkmany