From b67554f47b20316a9638648f2c6e8a65f8882755 Mon Sep 17 00:00:00 2001
From: zeromus <zeromus@users.sf.net>
Date: Wed, 13 Aug 2008 08:40:12 +0000
Subject: [PATCH] restore unzipping for sdl, also

---
 changelog.txt |  2 +-
 src/file.cpp  | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 81 insertions(+), 1 deletion(-)

diff --git a/changelog.txt b/changelog.txt
index 700e335a..4d492680 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -1,6 +1,6 @@
 ---version 2.0.2 released---
 
-13-aug-2008 - zeromus - restore ungzipping capability which was lost when archive support was added
+13-aug-2008 - zeromus - restore ungzipping (and unzipping in sdl) capability which was lost when archive support was added
 13-aug-2008 - zeromus - add FORBID breakpoints - regions which block breakpoints from happening if they contain the PC
 13-aug-2008 - punkrockguy318 - SDL: fixed --input(1-4) options.  input1 and 2 are regular inputs, input3 and 4 are famicom expansion inputs
 12-aug-2008 - zeromus - fix SDL configfile woes. configfile now goes to ~/.fceux/fceux.cfg
diff --git a/src/file.cpp b/src/file.cpp
index 2cd474b5..c9fb7c59 100644
--- a/src/file.cpp
+++ b/src/file.cpp
@@ -184,6 +184,73 @@ FileBaseInfo DetermineFileBase(const char *f) {
 
 inline FileBaseInfo DetermineFileBase(const std::string& str) { return DetermineFileBase(str.c_str()); }
 
+static FCEUFILE * TryUnzip(const std::string& path) {
+	unzFile tz;
+	if((tz=unzOpen(path.c_str())))  // If it's not a zip file, use regular file handlers.
+		// Assuming file type by extension usually works,
+		// but I don't like it. :)
+	{
+		if(unzGoToFirstFile(tz)==UNZ_OK)
+		{
+			for(;;)
+			{
+				char tempu[512];	// Longer filenames might be possible, but I don't
+				// think people would name files that long in zip files...
+				unzGetCurrentFileInfo(tz,0,tempu,512,0,0,0,0);
+				tempu[511]=0;
+				if(strlen(tempu)>=4)
+				{
+					char *za=tempu+strlen(tempu)-4;
+
+					//if(!ext)
+					{
+						if(!strcasecmp(za,".nes") || !strcasecmp(za,".fds") ||
+							!strcasecmp(za,".nsf") || !strcasecmp(za,".unf") ||
+							!strcasecmp(za,".nez"))
+							break;
+					}
+					//else if(!strcasecmp(za,ext))
+					//	break;
+				}
+				if(strlen(tempu)>=5)
+				{
+					if(!strcasecmp(tempu+strlen(tempu)-5,".unif"))
+						break;
+				}
+				if(unzGoToNextFile(tz)!=UNZ_OK)
+				{
+					if(unzGoToFirstFile(tz)!=UNZ_OK) goto zpfail;
+					break;
+				}
+			}
+			if(unzOpenCurrentFile(tz)!=UNZ_OK)
+				goto zpfail;
+		}
+		else
+		{
+zpfail:
+			unzClose(tz);
+			return 0;
+		}
+
+		unz_file_info ufo;
+		unzGetCurrentFileInfo(tz,&ufo,0,0,0,0,0,0);
+		
+		int size = ufo.uncompressed_size;
+		memorystream* ms = new memorystream(size);
+		unzReadCurrentFile(tz,ms->buf(),ufo.uncompressed_size);
+		unzCloseCurrentFile(tz);
+		unzClose(tz);
+
+		FCEUFILE *fceufp=fceufp = new FCEUFILE();
+		fceufp->stream = ms;
+		fceufp->size = size;
+		return fceufp;
+		
+	}
+
+	return 0;
+}
 
 FCEUFILE * FCEU_fopen(const char *path, const char *ipsfn, char *mode, char *ext, int index)
 {
@@ -218,6 +285,19 @@ FCEUFILE * FCEU_fopen(const char *path, const char *ipsfn, char *mode, char *ext
 				return 0;
 			}
 
+			//try to read a zip file
+			{
+				fceufp = TryUnzip(fileToOpen);
+				if(fceufp) {
+					delete fp;
+					fceufp->filename = fileToOpen;
+					fceufp->logicalPath = fileToOpen;
+					fceufp->fullFilename = fileToOpen;
+					fceufp->archiveIndex = -1;
+					goto applyips;
+				}
+			}
+
 			//try to read a gzipped file
 			{
 				uint32 magic;