o add my bsnes branch

tools/bsnes/reader/zipreader.cpp

@@ -0,0 +1,61 @@
+#ifdef READER_CPP
+
+#include "zipreader.hpp"
+
+unsigned ZipReader::size() {
+  return filesize;
+}
+
+uint8_t* ZipReader::read(unsigned length) {
+  if(!filesize) return 0;
+
+  uint8_t *data = 0;
+  if(length <= filesize) {
+    //read the entire file into RAM
+    data = new(zeromemory) uint8_t[filesize];
+    unzReadCurrentFile(zipfile, data, filesize);
+  } else { /* length > filesize */
+    //read the entire file into RAM, pad the rest with 0x00s
+    data = new(zeromemory) uint8_t[length];
+    unzReadCurrentFile(zipfile, data, filesize);
+  }
+
+  return data;
+}
+
+bool ZipReader::ready() {
+  return zipready;
+}
+
+ZipReader::ZipReader(const char *fn) : filesize(0), zipready(false) {
+  unz_file_info cFileInfo;  //Create variable to hold info for a compressed file
+  char cFileName[sizeof(cname)];
+
+  if(zipfile = unzOpen(fn)) {  //Open zip file
+    for(int cFile = unzGoToFirstFile(zipfile); cFile == UNZ_OK; cFile = unzGoToNextFile(zipfile)) {
+      //Gets info on current file, and places it in cFileInfo
+      unzGetCurrentFileInfo(zipfile, &cFileInfo, cFileName, sizeof(cname), 0, 0, 0, 0);
+
+      //verify uncompressed file is not bigger than max ROM size
+      if((cFileInfo.uncompressed_size <= 0x1000000 + 512) && (cFileInfo.uncompressed_size > filesize)) {
+        strcpy(cname, cFileName);
+        filesize = cFileInfo.uncompressed_size;
+      }
+    }
+
+    if(filesize) {
+      unzLocateFile(zipfile, cname, 1);
+      unzOpenCurrentFile(zipfile);
+      zipready = true;
+    }
+  }
+}
+
+ZipReader::~ZipReader() {
+  if(zipfile) {
+    unzCloseCurrentFile(zipfile);
+    unzClose(zipfile);
+  }
+}
+
+#endif //ifdef READER_CPP