// lipthing2.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

// The lip data index file is just a giant block of these
struct LipFileInfo
{
	unsigned long fileNameCRC;
	unsigned long offset;
};
std::vector<LipFileInfo> lipFiles;

struct LFCompare
{
	bool operator()(const LipFileInfo &a, const LipFileInfo &b)
	{
		return a.fileNameCRC < b.fileNameCRC;
	}
};

HANDLE	bigLipFile;
unsigned long curOffset = 0;

// CRC lookup table
static const unsigned long crc_table[256] = 
{
  0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
  0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
  0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
  0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
  0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
  0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
  0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
  0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
  0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
  0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
  0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
  0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
  0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
  0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
  0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
  0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
  0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
  0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
  0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
  0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
  0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
  0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
  0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
  0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
  0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
  0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
  0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
  0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
  0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
  0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
  0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
  0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
  0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
  0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
  0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
  0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
  0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
  0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
  0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
  0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
  0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
  0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
  0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
  0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
  0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
  0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
  0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
  0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
  0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
  0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
  0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
  0x2d02ef8dL
};

// 32 bit CRC checksum
unsigned long crc32(unsigned long crc, const unsigned char *buf, unsigned long len)
{
	if(!buf)
	{
		return(0);
	}
	crc = crc ^ 0xffffffff;
	while(len--)
	{
		crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
	}
    return(crc ^ 0xffffffff);
}

#define PATH_SEP	'\\'

void FS_ReplaceSeparators( char *path ) {
	char	*s;

	for ( s = path ; *s ; s++ ) {
		if ( *s == '/' || *s == '\\' ) {
			*s = PATH_SEP;
		}
	}
}

char *FS_BuildOSPath( const char *qpath )
{
	char	temp[1024];
	static char ospath[2][1024];
	static int toggle;
	
	toggle ^= 1;		// flip-flop to allow two returns without clash

	sprintf( temp, "/base/%s", qpath );

	FS_ReplaceSeparators( temp );	
	sprintf( ospath[toggle], "d:%s", temp );

	return ospath[toggle];
}

// Convert pathname to filecode
int Sys_GetFileCode(const char* name)
{
	// Get the sound portion
	char *qpath = strstr(name, "sound");
	if( !qpath )
	{
		printf("ERROR: Couldn't find sound in %s\n", name);
		exit(-1);
	}

	// Get system level path
	char* osname = FS_BuildOSPath(qpath);
	
	// Generate hash for file name
	strlwr(osname);
	unsigned int code = crc32(0, (const unsigned char *)osname, strlen(osname));
	
	return code;
}


void _buildFileList(const char* path)
{
	WIN32_FIND_DATA data;
	char spec[1024];

	// Look for lipsync files
	sprintf(spec, "%s\\*.*", path);

	HANDLE h = FindFirstFile(spec, &data);
	while (h != INVALID_HANDLE_VALUE)
	{
		char full[1024];
		sprintf(full, "%s\\%s", path, data.cFileName);

		if (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
		{
			// Directory -- lets go recursive
			if (data.cFileName[0] != '.') {
				_buildFileList(full);
			}
		}
		else
		{
			// Is it a lip file?
			if( strstr(data.cFileName, ".lip") )
			{
				// Found one.
				strlwr(full);
				LipFileInfo info;
				info.fileNameCRC = Sys_GetFileCode(full);
				info.offset = curOffset;
				lipFiles.push_back(info);
				curOffset += data.nFileSizeLow;

				HANDLE lh = CreateFile(full, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
				if( lh == INVALID_HANDLE_VALUE )
				{
					printf("ERROR: Couldn't open %s\n", data.cFileName);
					assert( 0 );
					exit(-1);
				}

				char *buffer = (char *)malloc(data.nFileSizeLow);
				DWORD size = 0;
				if( !ReadFile(lh, buffer, data.nFileSizeLow, &size, NULL) || size != data.nFileSizeLow )
				{
					printf("ERROR: Couldn't read %s\n", data.cFileName);
					assert( 0 );
					exit(-1);
				}

				if( !WriteFile(bigLipFile, buffer, data.nFileSizeLow, &size, NULL) || size != data.nFileSizeLow )
				{
					printf("ERROR: Couldn't append %s\n", data.cFileName);
					assert( 0 );
					exit(-1);
				}
				free(buffer);
				CloseHandle(lh);
			}
		}

		// Continue the loop
		if (!FindNextFile(h, &data))
		{
			FindClose(h);
			return;
		}
	}
}


int _tmain(int argc, _TCHAR* argv[])
{
	// Open our mega-file
	bigLipFile = CreateFile("lipdata.dat", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	if( bigLipFile == INVALID_HANDLE_VALUE )
	{
		printf("ERROR: Couldn't make lipdata.dat\n");
		return -1;
	}

	// Scan for all lip-synch files, concatenating onto our mega-file,
	// and remembering the offsets of all of them
	_buildFileList(argv[1]);

	CloseHandle( bigLipFile );

	// Sort the index data
	std::sort(lipFiles.begin(), lipFiles.end(), LFCompare());

	// Write out the index data
	HANDLE hnd = CreateFile("lipdata.idx", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
	DWORD size;
	if( hnd == INVALID_HANDLE_VALUE )
	{
		printf("ERROR: Couldn't make lipdata.idx\n");
		return -1;
	}
	if ( !WriteFile(hnd, &lipFiles[0], lipFiles.size() * sizeof(LipFileInfo), &size, NULL) || size != lipFiles.size() * sizeof(LipFileInfo))
	{
		printf("ERROR: Couldn't write lipdata.idx\n");
		return -1;
	}
	CloseHandle(hnd);
	return 0;
}