//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//=============================================================================

#ifndef CAPTIONCOMPILER_H
#define CAPTIONCOMPILER_H
#ifdef _WIN32
#pragma once
#endif

#include "checksum_crc.h"
#include "datamap.h"

#define MAX_BLOCK_BITS 13

#define MAX_BLOCK_SIZE (1 << MAX_BLOCK_BITS)

#define COMPILED_CAPTION_FILEID MAKEID('V', 'C', 'C', 'D')
#define COMPILED_CAPTION_VERSION 1

#pragma pack(1)
struct CompiledCaptionHeader_t {
    DECLARE_BYTESWAP_DATADESC()
    int magic;
    int version;
    int numblocks;
    int blocksize;
    int directorysize;
    int dataoffset;
};

struct CaptionLookup_t {
    DECLARE_BYTESWAP_DATADESC()
    unsigned int hash;
    int blockNum;
    unsigned short offset;
    unsigned short length;

    void SetHash(char const *string) {
        int len = Q_strlen(string);
        char *tempstr = (char *)_alloca(len + 1);
        Q_strncpy(tempstr, string, len + 1);
        Q_strlower(tempstr);
        CRC32_t temp;
        CRC32_Init(&temp);
        CRC32_ProcessBuffer(&temp, tempstr, len);
        CRC32_Final(&temp);

        hash = (unsigned int)temp;
    }
};
#pragma pack()

class CCaptionLookupLess {
   public:
    bool Less(const CaptionLookup_t &lhs, const CaptionLookup_t &rhs,
              void *pContext) {
        return lhs.hash < rhs.hash;
    }
};

struct CaptionBlock_t {
    byte data[MAX_BLOCK_SIZE];
};

// For swapping compiled caption files
bool SwapClosecaptionFile(void *pData);
int UpdateOrCreateCaptionFile(const char *pSourceName, char *pTargetName,
                              int targetLen, bool bForce = false);

#endif  // CAPTIONCOMPILER_H