mirror of https://github.com/snes9xgit/snes9x.git
163 lines
3.5 KiB
C++
163 lines
3.5 KiB
C++
/*****************************************************************************\
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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This file is licensed under the Snes9x License.
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For further information, consult the LICENSE file in the root directory.
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\*****************************************************************************/
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#ifdef UNZIP_SUPPORT
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#include <assert.h>
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#include <ctype.h>
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#ifdef SYSTEM_ZIP
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#include <minizip/unzip.h>
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#else
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#include "unzip/unzip.h"
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#endif
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#include "snes9x.h"
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#include "memmap.h"
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bool8 LoadZip (const char *zipname, uint32 *TotalFileSize, uint8 *buffer)
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{
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*TotalFileSize = 0;
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unzFile file = unzOpen(zipname);
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if (file == NULL)
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return (FALSE);
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// find largest file in zip file (under MAX_ROM_SIZE) or a file with extension .1, or a file named program.rom
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char filename[132];
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uint32 filesize = 0;
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int port = unzGoToFirstFile(file);
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unz_file_info info;
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while (port == UNZ_OK)
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{
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char name[132];
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unzGetCurrentFileInfo(file, &info, name, 128, NULL, 0, NULL, 0);
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if (info.uncompressed_size > CMemory::MAX_ROM_SIZE + 512)
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{
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port = unzGoToNextFile(file);
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continue;
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}
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if (info.uncompressed_size > filesize)
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{
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strcpy(filename, name);
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filesize = info.uncompressed_size;
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}
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int len = strlen(name);
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if (len > 2 && name[len - 2] == '.' && name[len - 1] == '1')
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{
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strcpy(filename, name);
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filesize = info.uncompressed_size;
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break;
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}
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if (strncasecmp(name, "program.rom", 11) == 0)
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{
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strcpy(filename, name);
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filesize = info.uncompressed_size;
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break;
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}
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port = unzGoToNextFile(file);
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}
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int len = strlen(zipname);
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if (!(port == UNZ_END_OF_LIST_OF_FILE || port == UNZ_OK) || filesize == 0 ||
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(len > 5 && strcasecmp(zipname + len - 5, ".msu1") == 0 && strcasecmp(filename, "program.rom") != 0))
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{
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if (unzClose(file) != UNZ_OK)
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assert(FALSE);
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return (FALSE);
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}
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// find extension
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char tmp[2] = { 0, 0 };
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char *ext = strrchr(filename, '.');
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if (ext)
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ext++;
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else
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ext = tmp;
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uint8 *ptr = buffer;
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bool8 more = FALSE;
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unzLocateFile(file, filename, 0);
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unzGetCurrentFileInfo(file, &info, filename, 128, NULL, 0, NULL, 0);
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if (unzOpenCurrentFile(file) != UNZ_OK)
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{
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unzClose(file);
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return (FALSE);
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}
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do
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{
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assert(info.uncompressed_size <= CMemory::MAX_ROM_SIZE + 512);
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uint32 FileSize = info.uncompressed_size;
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int l = unzReadCurrentFile(file, ptr, FileSize);
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if (unzCloseCurrentFile(file) == UNZ_CRCERROR)
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{
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unzClose(file);
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return (FALSE);
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}
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if (l <= 0 || l != (int) FileSize)
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{
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unzClose(file);
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return (FALSE);
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}
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FileSize = Memory.HeaderRemove(FileSize, ptr);
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ptr += FileSize;
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*TotalFileSize += FileSize;
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int len;
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if (ptr - Memory.ROM < CMemory::MAX_ROM_SIZE + 512 && (isdigit(ext[0]) && ext[1] == 0 && ext[0] < '9'))
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{
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more = TRUE;
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ext[0]++;
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}
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else
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if (ptr - Memory.ROM < CMemory::MAX_ROM_SIZE + 512)
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{
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if (ext == tmp)
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len = strlen(filename);
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else
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len = ext - filename - 1;
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if ((len == 7 || len == 8) && strncasecmp(filename, "sf", 2) == 0 &&
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isdigit(filename[2]) && isdigit(filename[3]) && isdigit(filename[4]) &&
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isdigit(filename[5]) && isalpha(filename[len - 1]))
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{
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more = TRUE;
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filename[len - 1]++;
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}
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}
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else
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more = FALSE;
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if (more)
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{
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if (unzLocateFile(file, filename, 0) != UNZ_OK ||
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unzGetCurrentFileInfo(file, &info, filename, 128, NULL, 0, NULL, 0) != UNZ_OK ||
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unzOpenCurrentFile(file) != UNZ_OK)
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break;
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}
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} while (more);
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unzClose(file);
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return (TRUE);
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}
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#endif
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