// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2008-2015 Fuzhou Rockchip Electronics Co., Ltd
 */

#include <memory.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/stat.h>
#include <time.h>

/**
 * \brief       SHA-1 context structure
 */
typedef struct {
    unsigned long total[2];   /*!< number of bytes processed    */
    unsigned long state[5];   /*!< intermediate digest state    */
    unsigned char buffer[64]; /*!< data block being processed */
} sha1_context;

/*
 * 32-bit integer manipulation macros (big endian)
 */
#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n, b, i)                                                                                         \
    {                                                                                                                  \
        (n) = ((unsigned long)(b)[(i)] << 24) | ((unsigned long)(b)[(i) + 1] << 16) |                                  \
              ((unsigned long)(b)[(i) + 2] << 8) | ((unsigned long)(b)[(i) + 3]);                                      \
    }
#endif
#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n, b, i)                                                                                         \
    {                                                                                                                  \
        do {                                                                                                           \
            (b)[(i)] = (unsigned char)((n) >> 24);                                                                     \
            (b)[(i) + 1] = (unsigned char)((n) >> 16);                                                                 \
            (b)[(i) + 2] = (unsigned char)((n) >> 8);                                                                  \
            (b)[(i) + 3] = (unsigned char)((n));                                                                       \
        } while (0);                                                                                                   \
    }
#endif

/*
 * SHA-1 context setup
 */
static void sha1_starts(sha1_context *ctx)
{
    ctx->total[0] = 0;
    ctx->total[1] = 0;

    ctx->state[0] = 0x67452301;
    ctx->state[1] = 0xEFCDAB89;
    ctx->state[0x02] = 0x98BADCFE;
    ctx->state[0x03] = 0x10325476;
    ctx->state[0x04] = 0xC3D2E1F0;
}

static void sha1_process(sha1_context *ctx, const unsigned char data[64])
{
    unsigned long temp, W[16], A, B, C, D, E;

    GET_UINT32_BE(W[0], data, 0);
    GET_UINT32_BE(W[1], data, 4);
    GET_UINT32_BE(W[2], data, 8);
    GET_UINT32_BE(W[3], data, 12);
    GET_UINT32_BE(W[4], data, 16);
    GET_UINT32_BE(W[5], data, 20);
    GET_UINT32_BE(W[6], data, 24);
    GET_UINT32_BE(W[7], data, 28);
    GET_UINT32_BE(W[8], data, 32);
    GET_UINT32_BE(W[9], data, 36);
    GET_UINT32_BE(W[10], data, 40);
    GET_UINT32_BE(W[11], data, 44);
    GET_UINT32_BE(W[12], data, 48);
    GET_UINT32_BE(W[13], data, 52);
    GET_UINT32_BE(W[14], data, 56);
    GET_UINT32_BE(W[15], data, 60);

#define S(x, n) (((x) << (n)) | (((x)&0xFFFFFFFF) >> (32 - (n))))

#define R(t)                                                                                                           \
    (temp = W[((t)-3) & 0x0F] ^ W[((t)-8) & 0x0F] ^ W[((t)-14) & 0x0F] ^ W[(t)&0x0F], (W[t & 0x0F] = S(temp, 1)))

#define P(a, b, c, d, e, x)                                                                                            \
    {                                                                                                                  \
        do {                                                                                                           \
            e += S(a, 0x5) + F(b, c, d) + K + (x);                                                                     \
            b = S(b, 0x1e);                                                                                            \
        } while (0);                                                                                                   \
    }

    A = ctx->state[0x0];
    B = ctx->state[0x1];
    C = ctx->state[0x2];
    D = ctx->state[0x3];
    E = ctx->state[0x4];

#define F(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
#define K 0x5A827999

    P(A, B, C, D, E, W[0]);
    P(E, A, B, C, D, W[1]);
    P(D, E, A, B, C, W[2]);
    P(C, D, E, A, B, W[3]);
    P(B, C, D, E, A, W[4]);
    P(A, B, C, D, E, W[5]);
    P(E, A, B, C, D, W[6]);
    P(D, E, A, B, C, W[7]);
    P(C, D, E, A, B, W[8]);
    P(B, C, D, E, A, W[9]);
    P(A, B, C, D, E, W[10]);
    P(E, A, B, C, D, W[11]);
    P(D, E, A, B, C, W[12]);
    P(C, D, E, A, B, W[13]);
    P(B, C, D, E, A, W[14]);
    P(A, B, C, D, E, W[15]);
    P(E, A, B, C, D, R(16));
    P(D, E, A, B, C, R(17));
    P(C, D, E, A, B, R(18));
    P(B, C, D, E, A, R(19));

#undef K
#undef F

#define F(x, y, z) ((x) ^ (y) ^ (z))
#define K 0x6ED9EBA1

    P(A, B, C, D, E, R(20));
    P(E, A, B, C, D, R(21));
    P(D, E, A, B, C, R(22));
    P(C, D, E, A, B, R(23));
    P(B, C, D, E, A, R(24));
    P(A, B, C, D, E, R(25));
    P(E, A, B, C, D, R(26));
    P(D, E, A, B, C, R(27));
    P(C, D, E, A, B, R(28));
    P(B, C, D, E, A, R(29));
    P(A, B, C, D, E, R(30));
    P(E, A, B, C, D, R(31));
    P(D, E, A, B, C, R(32));
    P(C, D, E, A, B, R(33));
    P(B, C, D, E, A, R(34));
    P(A, B, C, D, E, R(35));
    P(E, A, B, C, D, R(36));
    P(D, E, A, B, C, R(37));
    P(C, D, E, A, B, R(38));
    P(B, C, D, E, A, R(39));

#undef K
#undef F

#define F(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
#define K 0x8F1BBCDC

    P(A, B, C, D, E, R(40));
    P(E, A, B, C, D, R(41));
    P(D, E, A, B, C, R(42));
    P(C, D, E, A, B, R(43));
    P(B, C, D, E, A, R(44));
    P(A, B, C, D, E, R(45));
    P(E, A, B, C, D, R(46));
    P(D, E, A, B, C, R(47));
    P(C, D, E, A, B, R(48));
    P(B, C, D, E, A, R(49));
    P(A, B, C, D, E, R(50));
    P(E, A, B, C, D, R(51));
    P(D, E, A, B, C, R(52));
    P(C, D, E, A, B, R(53));
    P(B, C, D, E, A, R(54));
    P(A, B, C, D, E, R(55));
    P(E, A, B, C, D, R(56));
    P(D, E, A, B, C, R(57));
    P(C, D, E, A, B, R(58));
    P(B, C, D, E, A, R(59));

#undef K
#undef F

#define F(x, y, z) ((x) ^ (y) ^ (z))
#define K 0xCA62C1D6

    P(A, B, C, D, E, R(60));
    P(E, A, B, C, D, R(61));
    P(D, E, A, B, C, R(62));
    P(C, D, E, A, B, R(63));
    P(B, C, D, E, A, R(64));
    P(A, B, C, D, E, R(65));
    P(E, A, B, C, D, R(66));
    P(D, E, A, B, C, R(67));
    P(C, D, E, A, B, R(68));
    P(B, C, D, E, A, R(69));
    P(A, B, C, D, E, R(70));
    P(E, A, B, C, D, R(71));
    P(D, E, A, B, C, R(72));
    P(C, D, E, A, B, R(73));
    P(B, C, D, E, A, R(74));
    P(A, B, C, D, E, R(75));
    P(E, A, B, C, D, R(76));
    P(D, E, A, B, C, R(77));
    P(C, D, E, A, B, R(78));
    P(B, C, D, E, A, R(79));

#undef K
#undef F

    ctx->state[0x0] += A;
    ctx->state[0x1] += B;
    ctx->state[0x2] += C;
    ctx->state[0x3] += D;
    ctx->state[0x4] += E;
}

#undef P
#undef R
#undef S

/*
 * SHA-1 process buffer
 */
static void sha1_update(sha1_context *ctx, const unsigned char *input, unsigned int ilen)
{
    int fill;
    unsigned long left;

    if (ilen <= 0) {
        return;
    }

    left = ctx->total[0] & 0x3F;
    fill = 0x40 - left;

    ctx->total[0] += ilen;
    ctx->total[0] &= 0xFFFFFFFF;

    if (ctx->total[0] < (unsigned long)ilen) {
        ctx->total[1]++;
    }

    if (left && ilen >= fill) {
        memcpy((void *)(ctx->buffer + left), (void *)input, fill);
        sha1_process(ctx, ctx->buffer);
        input += fill;
        ilen -= fill;
        left = 0;
    }

    while (ilen >= 0x40) {
        sha1_process(ctx, input);
        input += 0x40;
        ilen -= 0x40;
    }

    if (ilen > 0) {
        memcpy((void *)(ctx->buffer + left), (void *)input, ilen);
    }
}

static const unsigned char sha1_padding[64] = {0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                                               0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                                               0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

/*
 * SHA-1 final digest
 */
static void sha1_finish(sha1_context *ctx, unsigned char output[0x14])
{
    unsigned long last, padn;
    unsigned long high, low;
    unsigned char msglen[0x8];

    high = (ctx->total[0] >> 0x1d) | (ctx->total[1] << 0x3);
    low = (ctx->total[0] << 0x3);

    PUT_UINT32_BE(high, msglen, 0x0);
    PUT_UINT32_BE(low, msglen, 0x4);

    last = ctx->total[0] & 0x3F;
    padn = (last < 0x38) ? (0x38 - last) : (0x78 - last);

    sha1_update(ctx, (unsigned char *)sha1_padding, padn);
    sha1_update(ctx, msglen, 0x8);

    PUT_UINT32_BE(ctx->state[0x0], output, 0x0);
    PUT_UINT32_BE(ctx->state[0x1], output, 0x4);
    PUT_UINT32_BE(ctx->state[0x2], output, 0x8);
    PUT_UINT32_BE(ctx->state[0x3], output, 0xc);
    PUT_UINT32_BE(ctx->state[0x4], output, 0x10);
}

/*
 * Output = SHA-1( input buffer )
 */
static void sha1_csum(const unsigned char *input, unsigned int ilen, unsigned char *output)
{
    sha1_context ctx;

    sha1_starts(&ctx);
    sha1_update(&ctx, input, ilen);
    sha1_finish(&ctx, output);
}

typedef struct {
    uint32_t total[2];
    uint32_t state[8];
    uint8_t buffer[64];
} sha256_context;

static void sha256_starts(sha256_context *ctx)
{
    ctx->total[0] = 0;
    ctx->total[1] = 0;

    ctx->state[0x0] = 0x6A09E667;
    ctx->state[0x1] = 0xBB67AE85;
    ctx->state[0x2] = 0x3C6EF372;
    ctx->state[0x3] = 0xA54FF53A;
    ctx->state[0x4] = 0x510E527F;
    ctx->state[0x5] = 0x9B05688C;
    ctx->state[0x6] = 0x1F83D9AB;
    ctx->state[0x7] = 0x5BE0CD19;
}

static void sha256_process(sha256_context *ctx, const uint8_t data[64])
{
    uint32_t temp1, temp2;
    uint32_t W[64];
    uint32_t A, B, C, D, E, F, G, H;

    GET_UINT32_BE(W[0x0], data, 0x0);
    GET_UINT32_BE(W[0x1], data, 0x4);
    GET_UINT32_BE(W[0x2], data, 0x8);
    GET_UINT32_BE(W[0x3], data, 0xc);
    GET_UINT32_BE(W[0x4], data, 0x10);
    GET_UINT32_BE(W[0x5], data, 0x14);
    GET_UINT32_BE(W[0x6], data, 0x18);
    GET_UINT32_BE(W[0x7], data, 0x1c);
    GET_UINT32_BE(W[0x8], data, 0x20);
    GET_UINT32_BE(W[0x9], data, 0x24);
    GET_UINT32_BE(W[0xa], data, 0x28);
    GET_UINT32_BE(W[0xb], data, 0x2c);
    GET_UINT32_BE(W[0xc], data, 0x30);
    GET_UINT32_BE(W[0xd], data, 0x34);
    GET_UINT32_BE(W[0xe], data, 0x38);
    GET_UINT32_BE(W[0xf], data, 0x3c);

#define SHR(x, n) (((x)&0xFFFFFFFF) >> (n))
#define ROTR(x, n) (SHR(x, n) | ((x) << (0x20 - (n))))

#define S0(x) (ROTR(x, 0x7) ^ ROTR(x, 0x12) ^ SHR(x, 0x3))
#define S1(x) (ROTR(x, 0x11) ^ ROTR(x, 0x13) ^ SHR(x, 0xa))

#define S2(x) (ROTR(x, 0x2) ^ ROTR(x, 0xd) ^ ROTR(x, 0x16))
#define S3(x) (ROTR(x, 0x6) ^ ROTR(x, 0xb) ^ ROTR(x, 0x19))

#define F0(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
#define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))

#define R(t) (W[t] = S1(W[(t)-0x2]) + W[(t)-0x7] + S0(W[(t)-0xf]) + W[(t)-0x10])

#define P(a, b, c, d, e, f, g, h, x, K)                                                                                \
    {                                                                                                                  \
        do {                                                                                                           \
            temp1 = (h) + S3(e) + F1(e, f, g) + (K) + (x);                                                             \
            temp2 = S2(a) + F0(a, b, c);                                                                               \
            d += temp1;                                                                                                \
            h = temp1 + temp2;                                                                                         \
        } while (0);                                                                                                   \
    }

    A = ctx->state[0x0];
    B = ctx->state[0x1];
    C = ctx->state[0x2];
    D = ctx->state[0x3];
    E = ctx->state[0x4];
    F = ctx->state[0x5];
    G = ctx->state[0x6];
    H = ctx->state[0x7];

    P(A, B, C, D, E, F, G, H, W[0], 0x428A2F98);
    P(H, A, B, C, D, E, F, G, W[1], 0x71374491);
    P(G, H, A, B, C, D, E, F, W[2], 0xB5C0FBCF);
    P(F, G, H, A, B, C, D, E, W[3], 0xE9B5DBA5);
    P(E, F, G, H, A, B, C, D, W[4], 0x3956C25B);
    P(D, E, F, G, H, A, B, C, W[5], 0x59F111F1);
    P(C, D, E, F, G, H, A, B, W[6], 0x923F82A4);
    P(B, C, D, E, F, G, H, A, W[7], 0xAB1C5ED5);
    P(A, B, C, D, E, F, G, H, W[8], 0xD807AA98);
    P(H, A, B, C, D, E, F, G, W[9], 0x12835B01);
    P(G, H, A, B, C, D, E, F, W[10], 0x243185BE);
    P(F, G, H, A, B, C, D, E, W[11], 0x550C7DC3);
    P(E, F, G, H, A, B, C, D, W[12], 0x72BE5D74);
    P(D, E, F, G, H, A, B, C, W[13], 0x80DEB1FE);
    P(C, D, E, F, G, H, A, B, W[14], 0x9BDC06A7);
    P(B, C, D, E, F, G, H, A, W[15], 0xC19BF174);
    P(A, B, C, D, E, F, G, H, R(16), 0xE49B69C1);
    P(H, A, B, C, D, E, F, G, R(17), 0xEFBE4786);
    P(G, H, A, B, C, D, E, F, R(18), 0x0FC19DC6);
    P(F, G, H, A, B, C, D, E, R(19), 0x240CA1CC);
    P(E, F, G, H, A, B, C, D, R(20), 0x2DE92C6F);
    P(D, E, F, G, H, A, B, C, R(21), 0x4A7484AA);
    P(C, D, E, F, G, H, A, B, R(22), 0x5CB0A9DC);
    P(B, C, D, E, F, G, H, A, R(23), 0x76F988DA);
    P(A, B, C, D, E, F, G, H, R(24), 0x983E5152);
    P(H, A, B, C, D, E, F, G, R(25), 0xA831C66D);
    P(G, H, A, B, C, D, E, F, R(26), 0xB00327C8);
    P(F, G, H, A, B, C, D, E, R(27), 0xBF597FC7);
    P(E, F, G, H, A, B, C, D, R(28), 0xC6E00BF3);
    P(D, E, F, G, H, A, B, C, R(29), 0xD5A79147);
    P(C, D, E, F, G, H, A, B, R(30), 0x06CA6351);
    P(B, C, D, E, F, G, H, A, R(31), 0x14292967);
    P(A, B, C, D, E, F, G, H, R(32), 0x27B70A85);
    P(H, A, B, C, D, E, F, G, R(33), 0x2E1B2138);
    P(G, H, A, B, C, D, E, F, R(34), 0x4D2C6DFC);
    P(F, G, H, A, B, C, D, E, R(35), 0x53380D13);
    P(E, F, G, H, A, B, C, D, R(36), 0x650A7354);
    P(D, E, F, G, H, A, B, C, R(37), 0x766A0ABB);
    P(C, D, E, F, G, H, A, B, R(38), 0x81C2C92E);
    P(B, C, D, E, F, G, H, A, R(39), 0x92722C85);
    P(A, B, C, D, E, F, G, H, R(40), 0xA2BFE8A1);
    P(H, A, B, C, D, E, F, G, R(41), 0xA81A664B);
    P(G, H, A, B, C, D, E, F, R(42), 0xC24B8B70);
    P(F, G, H, A, B, C, D, E, R(43), 0xC76C51A3);
    P(E, F, G, H, A, B, C, D, R(44), 0xD192E819);
    P(D, E, F, G, H, A, B, C, R(45), 0xD6990624);
    P(C, D, E, F, G, H, A, B, R(46), 0xF40E3585);
    P(B, C, D, E, F, G, H, A, R(47), 0x106AA070);
    P(A, B, C, D, E, F, G, H, R(48), 0x19A4C116);
    P(H, A, B, C, D, E, F, G, R(49), 0x1E376C08);
    P(G, H, A, B, C, D, E, F, R(50), 0x2748774C);
    P(F, G, H, A, B, C, D, E, R(51), 0x34B0BCB5);
    P(E, F, G, H, A, B, C, D, R(52), 0x391C0CB3);
    P(D, E, F, G, H, A, B, C, R(53), 0x4ED8AA4A);
    P(C, D, E, F, G, H, A, B, R(54), 0x5B9CCA4F);
    P(B, C, D, E, F, G, H, A, R(55), 0x682E6FF3);
    P(A, B, C, D, E, F, G, H, R(56), 0x748F82EE);
    P(H, A, B, C, D, E, F, G, R(57), 0x78A5636F);
    P(G, H, A, B, C, D, E, F, R(58), 0x84C87814);
    P(F, G, H, A, B, C, D, E, R(59), 0x8CC70208);
    P(E, F, G, H, A, B, C, D, R(60), 0x90BEFFFA);
    P(D, E, F, G, H, A, B, C, R(61), 0xA4506CEB);
    P(C, D, E, F, G, H, A, B, R(62), 0xBEF9A3F7);
    P(B, C, D, E, F, G, H, A, R(63), 0xC67178F2);

    ctx->state[0x0] += A;
    ctx->state[0x1] += B;
    ctx->state[0x2] += C;
    ctx->state[0x3] += D;
    ctx->state[0x4] += E;
    ctx->state[0x5] += F;
    ctx->state[0x6] += G;
    ctx->state[0x7] += H;
}

#undef P
#undef R
#undef F1
#undef F0
#undef S3
#undef S2
#undef S1
#undef S0
#undef ROTR
#undef SHR

static void sha256_update(sha256_context *ctx, const uint8_t *input, uint32_t length)
{
    uint32_t left, fill;

    if (!length) {
        return;
    }

    left = ctx->total[0] & 0x3F;
    fill = 0x40 - left;

    ctx->total[0] += length;
    ctx->total[0] &= 0xFFFFFFFF;

    if (ctx->total[0] < length) {
        ctx->total[1]++;
    }

    if (left && length >= fill) {
        memcpy((void *)(ctx->buffer + left), (void *)input, fill);
        sha256_process(ctx, ctx->buffer);
        length -= fill;
        input += fill;
        left = 0;
    }

    while (length >= 0x40) {
        sha256_process(ctx, input);
        length -= 0x40;
        input += 0x40;
    }

    if (length) {
        memcpy((void *)(ctx->buffer + left), (void *)input, length);
    }
}

static uint8_t sha256_padding[64] = {0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                                     0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                                     0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};

static void sha256_finish(sha256_context *ctx, uint8_t digest[32])
{
    uint32_t last, padn;
    uint32_t high, low;
    uint8_t msglen[8];

    high = ((ctx->total[0] >> 0x1d) | (ctx->total[1] << 0x3));
    low = (ctx->total[0] << 0x3);

    PUT_UINT32_BE(high, msglen, 0);
    PUT_UINT32_BE(low, msglen, 0x4);

    last = ctx->total[0] & 0x3F;
    padn = (last < 0x38) ? (0x38 - last) : (0x78 - last);

    sha256_update(ctx, sha256_padding, padn);
    sha256_update(ctx, msglen, 0x8);

    PUT_UINT32_BE(ctx->state[0x0], digest, 0x0);
    PUT_UINT32_BE(ctx->state[0x1], digest, 0x4);
    PUT_UINT32_BE(ctx->state[0x2], digest, 0x8);
    PUT_UINT32_BE(ctx->state[0x3], digest, 0xc);
    PUT_UINT32_BE(ctx->state[0x4], digest, 0x10);
    PUT_UINT32_BE(ctx->state[0x5], digest, 0x14);
    PUT_UINT32_BE(ctx->state[0x6], digest, 0x18);
    PUT_UINT32_BE(ctx->state[0x7], digest, 0x1c);
}

/*
 * Output = SHA-256( input buffer ).
 */
static void sha256_csum(const unsigned char *input, unsigned int ilen, unsigned char *output)
{
    sha256_context ctx;

    sha256_starts(&ctx);
    sha256_update(&ctx, input, ilen);
    sha256_finish(&ctx, output);
}

static bool g_debug =
#ifdef DEBUG
    true;
#else
    false;
#endif /* DEBUG */

#define LOGE(fmt, args...) fprintf(stderr, "E/%s(%d): " fmt "\n", __func__, __LINE__, ##args)
#define LOGD(fmt, args...)                                                                                             \
    do {                                                                                                               \
        if (g_debug)                                                                                                   \
            fprintf(stderr, "D/%s(%d): " fmt "\n", __func__, __LINE__, ##args);                                        \
    } while (0)

/* sync with ./board/rockchip/rk30xx/rkloader.c #define FDT_PATH */
#define FDT_PATH "rk-kernel.dtb"
#define DTD_SUBFIX ".dtb"

#define DEFAULT_IMAGE_PATH "resource.img"
#define DEFAULT_UNPACK_DIR "out"
#define BLOCK_SIZE 512

#define RESOURCE_PTN_HDR_SIZE 1
#define INDEX_TBL_ENTR_SIZE 1

#define RESOURCE_PTN_VERSION 0
#define INDEX_TBL_VERSION 0

#define RESOURCE_PTN_HDR_MAGIC "RSCE"
typedef struct {
    char magic[4]; /* tag, "RSCE" */
    uint16_t resource_ptn_version;
    uint16_t index_tbl_version;
    uint8_t header_size;    /* blocks, size of ptn header. */
    uint8_t tbl_offset;     /* blocks, offset of index table. */
    uint8_t tbl_entry_size; /* blocks, size of index table's entry. */
    uint32_t tbl_entry_num; /* numbers of index table's entry. */
} resource_ptn_header;

#define INDEX_TBL_ENTR_TAG "ENTR"
#define MAX_INDEX_ENTRY_PATH_LEN 220
#define MAX_HASH_LEN 32

typedef struct {
    char tag[4]; /* tag, "ENTR" */
    char path[MAX_INDEX_ENTRY_PATH_LEN];
    char hash[MAX_HASH_LEN]; /* hash data */
    uint32_t hash_size;      /* 20 or 32 */
    uint32_t content_offset; /* blocks, offset of resource content. */
    uint32_t content_size;   /* bytes, size of resource content. */
} index_tbl_entry;

#define OPT_VERBOSE "--verbose"
#define OPT_HELP "--help"
#define OPT_VERSION "--version"
#define OPT_PRINT "--print"
#define OPT_PACK "--pack"
#define OPT_UNPACK "--unpack"
#define OPT_TEST_LOAD "--test_load"
#define OPT_TEST_CHARGE "--test_charge"
#define OPT_IMAGE "--image="
#define OPT_ROOT "--root="

#define VERSION "2014-5-31 14:43:42"

typedef struct {
    char path[MAX_INDEX_ENTRY_PATH_LEN];
    uint32_t content_offset; /* blocks, offset of resource content. */
    uint32_t content_size;   /* bytes, size of resource content. */
    void *load_addr;
} resource_content;

typedef struct {
    int max_level;
    int num;
    int delay;
    char prefix[MAX_INDEX_ENTRY_PATH_LEN];
} anim_level_conf;

#define DEF_CHARGE_DESC_PATH "charge_anim_desc.txt"

#define OPT_CHARGE_ANIM_DELAY "delay="
#define OPT_CHARGE_ANIM_LOOP_CUR "only_current_level="
#define OPT_CHARGE_ANIM_LEVELS "levels="
#define OPT_CHARGE_ANIM_LEVEL_CONF "max_level="
#define OPT_CHARGE_ANIM_LEVEL_NUM "num="
#define OPT_CHARGE_ANIM_LEVEL_PFX "prefix="

static char image_path[MAX_INDEX_ENTRY_PATH_LEN] = "\0";

static int fix_blocks(size_t size)
{
    return (size + BLOCK_SIZE - 1) / BLOCK_SIZE;
}

static const char *fix_path(const char *path)
{
    if (!memcmp(path, "./", 2)) {
        return path + 2;
    }
    return path;
}

static uint16_t switch_short(uint16_t x)
{
    uint16_t val;
    uint8_t *p = (uint8_t *)(&x);

    val = (*p++ & 0xff) << 0x0;
    val |= (*p & 0xff) << 0x8;

    return val;
}

static uint32_t switch_int(uint32_t x)
{
    uint32_t val;
    uint8_t *p = (uint8_t *)(&x);

    val = (*p++ & 0xff) << 0;
    val |= (*p++ & 0xff) << 0x8;
    val |= (*p++ & 0xff) << 0x10;
    val |= (*p & 0xff) << 0x18;

    return val;
}

static void fix_header(resource_ptn_header *header)
{
    /* switch for be. */
    header->resource_ptn_version = switch_short(header->resource_ptn_version);
    header->index_tbl_version = switch_short(header->index_tbl_version);
    header->tbl_entry_num = switch_int(header->tbl_entry_num);
}

static void fix_entry(index_tbl_entry *entry)
{
    /* switch for be. */
    entry->content_offset = switch_int(entry->content_offset);
    entry->content_size = switch_int(entry->content_size);
}

static int inline get_ptn_offset(void)
{
    return 0;
}

static bool StorageWriteLba(int offset_block, void *data, int blocks)
{
    bool ret = false;
    FILE *file = fopen(image_path, "rb+");
    if (!file) {
        goto end;
    }
    int offset = offset_block * BLOCK_SIZE;
    fseek(file, offset, SEEK_SET);
    if (offset != ftell(file)) {
        LOGE("Failed to seek %s to %d!", image_path, offset);
        goto end;
    }
    if (!fwrite(data, blocks * BLOCK_SIZE, 1, file)) {
        LOGE("Failed to write %s!", image_path);
        goto end;
    }
    ret = true;
end:
    if (file) {
        fclose(file);
    }
    return ret;
}

static bool StorageReadLba(int offset_block, void *data, int blocks)
{
    bool ret = false;
    FILE *file = fopen(image_path, "rb");
    if (!file) {
        goto end;
    }
    int offset = offset_block * BLOCK_SIZE;
    fseek(file, offset, SEEK_SET);
    if (offset != ftell(file)) {
        goto end;
    }
    if (!fread(data, blocks * BLOCK_SIZE, 1, file)) {
        goto end;
    }
    ret = true;
end:
    if (file) {
        fclose(file);
    }
    return ret;
}

static bool write_data(int offset_block, void *data, size_t len)
{
    bool ret = false;
    if (!data) {
        goto end;
    }
    int blocks = len / BLOCK_SIZE;
    if (blocks && !StorageWriteLba(offset_block, data, blocks)) {
        goto end;
    }
    int left = len % BLOCK_SIZE;
    if (left) {
        char buf[BLOCK_SIZE] = "\0";
        memcpy(buf, data + blocks * BLOCK_SIZE, left);
        if (!StorageWriteLba(offset_block + blocks, buf, 1)) {
            goto end;
        }
    }
    ret = true;
end:
    return ret;
}

/**********************load test************************/
static int load_file(const char *file_path, int offset_block, int blocks);

static int test_load(int argc, char **argv)
{
    if (argc < 1) {
        LOGE("Nothing to load!");
        return -1;
    }
    const char *file_path;
    int offset_block = 0;
    int blocks = 0;
    if (argc > 0) {
        file_path = (const char *)fix_path(argv[0]);
        argc--, argv++;
    }
    if (argc > 0) {
        offset_block = atoi(argv[0]);
        argc--, argv++;
    }
    if (argc > 0) {
        blocks = atoi(argv[0]);
    }
    return load_file(file_path, offset_block, blocks);
}

static void free_content(resource_content *content)
{
    if (content->load_addr) {
        free(content->load_addr);
        content->load_addr = 0;
    }
}

static void tests_dump_file(const char *path, void *data, int len)
{
    FILE *file = fopen(path, "wb");
    if (!file) {
        return;
    }
    fwrite(data, len, 1, file);
    fclose(file);
}

static bool load_content(resource_content *content)
{
    if (content->load_addr) {
        return true;
    }
    int blocks = fix_blocks(content->content_size);
    content->load_addr = malloc(blocks * BLOCK_SIZE);
    if (!content->load_addr) {
        return false;
    }
    if (!StorageReadLba(get_ptn_offset() + content->content_offset, content->load_addr, blocks)) {
        free_content(content);
        return false;
    }

    tests_dump_file(content->path, content->load_addr, content->content_size);
    return true;
}

static bool load_content_data(resource_content *content, int offset_block, void *data, int blocks)
{
    if (!StorageReadLba(get_ptn_offset() + content->content_offset + offset_block, data, blocks)) {
        return false;
    }
    tests_dump_file(content->path, data, blocks * BLOCK_SIZE);
    return true;
}

static bool get_entry(const char *file_path, index_tbl_entry *entry)
{
    bool ret = false;
    char buf[BLOCK_SIZE];
    resource_ptn_header header;
    if (!StorageReadLba(get_ptn_offset(), buf, 1)) {
        LOGE("Failed to read header!");
        goto end;
    }
    memcpy(&header, buf, sizeof(header));

    if (memcmp(header.magic, RESOURCE_PTN_HDR_MAGIC, sizeof(header.magic))) {
        LOGE("Not a resource image(%s)!", image_path);
        goto end;
    }
    /* test on pc, switch for be. */
    fix_header(&header);

    /* support header_size & tbl_entry_size */
    if (header.resource_ptn_version != RESOURCE_PTN_VERSION || header.header_size != RESOURCE_PTN_HDR_SIZE ||
        header.index_tbl_version != INDEX_TBL_VERSION || header.tbl_entry_size != INDEX_TBL_ENTR_SIZE) {
        LOGE("Not supported in this version!");
        goto end;
    }

    int i;
    for (i = 0; i < header.tbl_entry_num; i++) {
        /* support tbl_entry_size */
        if (!StorageReadLba(get_ptn_offset() + header.header_size + i * header.tbl_entry_size, buf, 1)) {
            LOGE("Failed to read index entry:%d!", i);
            goto end;
        }
        memcpy(entry, buf, sizeof(*entry));

        if (memcmp(entry->tag, INDEX_TBL_ENTR_TAG, sizeof(entry->tag))) {
            LOGE("Something wrong with index entry:%d!", i);
            goto end;
        }

        if (!strncmp(entry->path, file_path, sizeof(entry->path))) {
            break;
        }
    }
    if (i == header.tbl_entry_num) {
        LOGE("Cannot find %s!", file_path);
        goto end;
    }
    /* test on pc, switch for be. */
    fix_entry(entry);

    printf("Found entry:\n\tpath:%s\n\toffset:%d\tsize:%d\n", entry->path, entry->content_offset, entry->content_size);

    ret = true;
end:
    return ret;
}

static bool get_content(resource_content *content)
{
    bool ret = false;
    index_tbl_entry entry;
    if (!get_entry(content->path, &entry)) {
        goto end;
    }
    content->content_offset = entry.content_offset;
    content->content_size = entry.content_size;
    ret = true;
end:
    return ret;
}

static int load_file(const char *file_path, int offset_block, int blocks)
{
    printf("Try to load:%s", file_path);
    if (blocks) {
        printf(", offset block:%d, blocks:%d\n", offset_block, blocks);
    } else {
        printf("\n");
    }
    bool ret = false;
    resource_content content;
    snprintf(content.path, sizeof(content.path), "%s", file_path);
    content.load_addr = 0;
    if (!get_content(&content)) {
        goto end;
    }
    if (!blocks) {
        if (!load_content(&content)) {
            goto end;
        }
    } else {
        void *data = malloc(blocks * BLOCK_SIZE);
        if (!data) {
            goto end;
        }
        if (!load_content_data(&content, offset_block, data, blocks)) {
            goto end;
        }
    }
    ret = true;
end:
    free_content(&content);
    return ret;
}

/**********************load test end************************/
/**********************anim test************************/

static bool parse_level_conf(const char *arg, anim_level_conf *level_conf)
{
    memset(level_conf, 0, sizeof(anim_level_conf));
    char *buf = NULL;
    buf = strstr(arg, OPT_CHARGE_ANIM_LEVEL_CONF);
    if (buf) {
        level_conf->max_level = atoi(buf + strlen(OPT_CHARGE_ANIM_LEVEL_CONF));
    } else {
        LOGE("Not found:%s", OPT_CHARGE_ANIM_LEVEL_CONF);
        return false;
    }
    buf = strstr(arg, OPT_CHARGE_ANIM_LEVEL_NUM);
    if (buf) {
        level_conf->num = atoi(buf + strlen(OPT_CHARGE_ANIM_LEVEL_NUM));
        if (level_conf->num <= 0) {
            return false;
        }
    } else {
        LOGE("Not found:%s", OPT_CHARGE_ANIM_LEVEL_NUM);
        return false;
    }
    buf = strstr(arg, OPT_CHARGE_ANIM_DELAY);
    if (buf) {
        level_conf->delay = atoi(buf + strlen(OPT_CHARGE_ANIM_DELAY));
    }
    buf = strstr(arg, OPT_CHARGE_ANIM_LEVEL_PFX);
    if (buf) {
        snprintf(level_conf->prefix, sizeof(level_conf->prefix), "%s", buf + strlen(OPT_CHARGE_ANIM_LEVEL_PFX));
    } else {
        LOGE("Not found:%s", OPT_CHARGE_ANIM_LEVEL_PFX);
        return false;
    }

    LOGD("Found conf:\nmax_level:%d, num:%d, delay:%d, prefix:%s", level_conf->max_level, level_conf->num,
         level_conf->delay, level_conf->prefix);
    return true;
}

static int test_charge(int argc, char **argv)
{
    const char *desc;
    if (argc > 0) {
        desc = argv[0];
    } else {
        desc = DEF_CHARGE_DESC_PATH;
    }

    resource_content content;
    snprintf(content.path, sizeof(content.path), "%s", desc);
    content.load_addr = 0;
    if (!get_content(&content)) {
        goto end;
    }
    if (!load_content(&content)) {
        goto end;
    }

    char *buf = (char *)content.load_addr;
    char *end = buf + content.content_size - 1;
    *end = '\0';
    LOGD("desc:\n%s", buf);

    int pos = 0;
    while (1) {
        char *line = (char *)memchr(buf + pos, '\n', strlen(buf + pos));
        if (!line) {
            break;
        }
        *line = '\0';
        LOGD("splite:%s", buf + pos);
        pos += (strlen(buf + pos) + 1);
    }

    int delay = 900;
    int only_current_level = false;
    anim_level_conf *level_confs = NULL;
    int level_conf_pos = 0;
    int level_conf_num = 0;

    while (true) {
        if (buf >= end) {
            break;
        }
        const char *arg = buf;
        buf += (strlen(buf) + 1);

        LOGD("parse arg:%s", arg);
        if (!memcmp(arg, OPT_CHARGE_ANIM_LEVEL_CONF, strlen(OPT_CHARGE_ANIM_LEVEL_CONF))) {
            if (!level_confs) {
                LOGE("Found level conf before levels!");
                goto end;
            }
            if (level_conf_pos >= level_conf_num) {
                LOGE("Too many level confs!(%d >= %d)", level_conf_pos, level_conf_num);
                goto end;
            }
            if (!parse_level_conf(arg, level_confs + level_conf_pos)) {
                LOGE("Failed to parse level conf:%s", arg);
                goto end;
            }
            level_conf_pos++;
        } else if (!memcmp(arg, OPT_CHARGE_ANIM_DELAY, strlen(OPT_CHARGE_ANIM_DELAY))) {
            delay = atoi(arg + strlen(OPT_CHARGE_ANIM_DELAY));
            LOGD("Found delay:%d", delay);
        } else if (!memcmp(arg, OPT_CHARGE_ANIM_LOOP_CUR, strlen(OPT_CHARGE_ANIM_LOOP_CUR))) {
            only_current_level = !memcmp(arg + strlen(OPT_CHARGE_ANIM_LOOP_CUR), "true", 0x04);
            LOGD("Found only_current_level:%d", only_current_level);
        } else if (!memcmp(arg, OPT_CHARGE_ANIM_LEVELS, strlen(OPT_CHARGE_ANIM_LEVELS))) {
            if (level_conf_num) {
                goto end;
            }
            level_conf_num = atoi(arg + strlen(OPT_CHARGE_ANIM_LEVELS));
            if (!level_conf_num) {
                goto end;
            }
            level_confs = (anim_level_conf *)malloc(level_conf_num * sizeof(anim_level_conf));
            LOGD("Found levels:%d", level_conf_num);
        } else {
            LOGE("Unknown arg:%s", arg);
            goto end;
        }
    }

    if (level_conf_pos != level_conf_num || !level_conf_num) {
        LOGE("Something wrong with level confs!");
        goto end;
    }

    int i = 0, j = 0;
    for (i = 0; i < level_conf_num; i++) {
        if (!level_confs[i].delay) {
            level_confs[i].delay = delay;
        }
        if (!level_confs[i].delay) {
            LOGE("Missing delay in level conf:%d", i);
            goto end;
        }
        for (j = 0; j < i; j++) {
            if (level_confs[j].max_level == level_confs[i].max_level) {
                LOGE("Dup level conf:%d", i);
                goto end;
            }
            if (level_confs[j].max_level > level_confs[i].max_level) {
                anim_level_conf conf = level_confs[i];
                memmove(level_confs + j + 1, level_confs + j, (i - j) * sizeof(anim_level_conf));
                level_confs[j] = conf;
            }
        }
    }

    printf("Parse anim desc(%s):\n", desc);
    printf("only_current_level=%d\n", only_current_level);
    printf("level conf:\n");
    for (i = 0; i < level_conf_num; i++) {
        printf("\tmax=%d, delay=%d, num=%d, prefix=%s\n", level_confs[i].max_level, level_confs[i].delay,
               level_confs[i].num, level_confs[i].prefix);
    }

end:
    free_content(&content);
    return 0;
}

/**********************anim test end************************/
/**********************append file************************/

static const char *PROG = NULL;
static resource_ptn_header header;
static bool just_print = false;
static char root_path[MAX_INDEX_ENTRY_PATH_LEN] = "\0";

static void version(void)
{
    printf("%s (cjf@rock-chips.com)\t" VERSION "\n", PROG);
}

static void usage(void)
{
    printf("Usage: %s [options] [FILES]\n", PROG);
    printf("Tools for Rockchip's resource image.\n");
    version();
    printf("Options:\n");
    printf("\t" OPT_PACK "\t\t\tPack image from given files.\n");
    printf("\t" OPT_UNPACK "\t\tUnpack given image to current dir.\n");
    printf("\t" OPT_IMAGE "path"
           "\t\tSpecify input/output image path.\n");
    printf("\t" OPT_PRINT "\t\t\tJust print informations.\n");
    printf("\t" OPT_VERBOSE "\t\tDisplay more runtime informations.\n");
    printf("\t" OPT_HELP "\t\t\tDisplay this information.\n");
    printf("\t" OPT_VERSION "\t\tDisplay version information.\n");
    printf("\t" OPT_ROOT "path"
           "\t\tSpecify resources' root dir.\n");
}

static int pack_image(int file_num, const char **files);
static int unpack_image(const char *dir);

enum ACTION {
    ACTION_PACK,
    ACTION_UNPACK,
    ACTION_TEST_LOAD,
    ACTION_TEST_CHARGE,
};

int main(int argc, char **argv)
{
    PROG = fix_path(argv[0]);

    enum ACTION action = ACTION_PACK;

    argc--, argv++;
    while (argc > 0 && argv[0][0] == '-') {
        /* it's a opt arg. */
        const char *arg = argv[0];
        argc--, argv++;
        if (!strcmp(OPT_VERBOSE, arg)) {
            g_debug = true;
        } else if (!strcmp(OPT_HELP, arg)) {
            usage();
            return 0;
        } else if (!strcmp(OPT_VERSION, arg)) {
            version();
            return 0;
        } else if (!strcmp(OPT_PRINT, arg)) {
            just_print = true;
        } else if (!strcmp(OPT_PACK, arg)) {
            action = ACTION_PACK;
        } else if (!strcmp(OPT_UNPACK, arg)) {
            action = ACTION_UNPACK;
        } else if (!strcmp(OPT_TEST_LOAD, arg)) {
            action = ACTION_TEST_LOAD;
        } else if (!strcmp(OPT_TEST_CHARGE, arg)) {
            action = ACTION_TEST_CHARGE;
        } else if (!memcmp(OPT_IMAGE, arg, strlen(OPT_IMAGE))) {
            snprintf(image_path, sizeof(image_path), "%s", arg + strlen(OPT_IMAGE));
        } else if (!memcmp(OPT_ROOT, arg, strlen(OPT_ROOT))) {
            snprintf(root_path, sizeof(root_path), "%s", arg + strlen(OPT_ROOT));
        } else {
            LOGE("Unknown opt:%s", arg);
            usage();
            return -1;
        }
    }

    if (!image_path[0]) {
        snprintf(image_path, sizeof(image_path), "%s", DEFAULT_IMAGE_PATH);
    }

    switch (action) {
        case ACTION_PACK: {
            int file_num = argc;
            const char **files = (const char **)argv;
            if (!file_num) {
                LOGE("No file to pack!");
                return 0;
            }
            LOGD("try to pack %d files.", file_num);
            return pack_image(file_num, files);
        }
        case ACTION_UNPACK: {
            return unpack_image(argc > 0 ? argv[0] : DEFAULT_UNPACK_DIR);
        }
        case ACTION_TEST_LOAD: {
            return test_load(argc, argv);
        }
        case ACTION_TEST_CHARGE: {
            return test_charge(argc, argv);
        }
    }
    /* not reach here. */
    return -1;
}

/************unpack code****************/
static bool mkdirs(char *path)
{
    char *tmp = path;
    char *pos = NULL;
    char buf[MAX_INDEX_ENTRY_PATH_LEN];
    bool ret = true;
    while ((pos = memchr(tmp, '/', strlen(tmp)))) {
        strcpy(buf, path);
        buf[pos - path] = '\0';
        tmp = pos + 1;
        LOGD("mkdir:%s", buf);
        if (!mkdir(buf, 0755)) {
            ret = false;
        }
    }
    if (!ret) {
        LOGD("Failed to mkdir(%s)!", path);
    }
    return ret;
}

static bool dump_file(FILE *file, const char *unpack_dir, index_tbl_entry entry)
{
    LOGD("try to dump entry:%s", entry.path);
    bool ret = false;
    FILE *out_file = NULL;
    long int pos = 0;
    char path[MAX_INDEX_ENTRY_PATH_LEN * 2 + 1];
    if (just_print) {
        ret = true;
        goto done;
    }

    pos = ftell(file);
    snprintf(path, sizeof(path), "%s/%s", unpack_dir, entry.path);
    mkdirs(path);
    out_file = fopen(path, "wb");
    if (!out_file) {
        LOGE("Failed to create:%s", path);
        goto end;
    }
    long int offset = entry.content_offset * BLOCK_SIZE;
    fseek(file, offset, SEEK_SET);
    if (offset != ftell(file)) {
        LOGE("Failed to read content:%s", entry.path);
        goto end;
    }
    char buf[BLOCK_SIZE];
    int n;
    int len = entry.content_size;
    while (len > 0) {
        n = len > BLOCK_SIZE ? BLOCK_SIZE : len;
        if (!fread(buf, n, 1, file)) {
            LOGE("Failed to read content:%s", entry.path);
            goto end;
        }
        if (!fwrite(buf, n, 1, out_file)) {
            LOGE("Failed to write:%s", entry.path);
            goto end;
        }
        len -= n;
    }
done:
    ret = true;
end:
    if (out_file) {
        fclose(out_file);
    }
    if (pos) {
        fseek(file, pos, SEEK_SET);
    }
    return ret;
}

static int unpack_image(const char *dir)
{
    FILE *image_file = NULL;
    bool ret = false;
    char unpack_dir[MAX_INDEX_ENTRY_PATH_LEN];
    if (just_print) {
        dir = ".";
    }
    snprintf(unpack_dir, sizeof(unpack_dir), "%s", dir);
    if (!strlen(unpack_dir)) {
        goto end;
    } else if (unpack_dir[strlen(unpack_dir) - 1] == '/') {
        unpack_dir[strlen(unpack_dir) - 1] = '\0';
    }

    mkdir(unpack_dir, 0755);
    image_file = fopen(image_path, "rb");
    char buf[BLOCK_SIZE];
    if (!image_file) {
        LOGE("Failed to open:%s", image_path);
        goto end;
    }
    if (!fread(buf, BLOCK_SIZE, 1, image_file)) {
        LOGE("Failed to read header!");
        goto end;
    }
    memcpy(&header, buf, sizeof(header));

    if (memcmp(header.magic, RESOURCE_PTN_HDR_MAGIC, sizeof(header.magic))) {
        LOGE("Not a resource image(%s)!", image_path);
        goto end;
    }
    /* switch for be. */
    fix_header(&header);

    printf("Dump header:\n");
    printf("partition version:%d.%d\n", header.resource_ptn_version, header.index_tbl_version);
    printf("header size:%d\n", header.header_size);
    printf("index tbl:\n\toffset:%d\tentry size:%d\tentry num:%d\n", header.tbl_offset, header.tbl_entry_size,
           header.tbl_entry_num);

    /* support header_size & tbl_entry_size */
    if (header.resource_ptn_version != RESOURCE_PTN_VERSION || header.header_size != RESOURCE_PTN_HDR_SIZE ||
        header.index_tbl_version != INDEX_TBL_VERSION || header.tbl_entry_size != INDEX_TBL_ENTR_SIZE) {
        LOGE("Not supported in this version!");
        goto end;
    }

    printf("Dump Index table:\n");
    index_tbl_entry entry;
    int i;
    for (i = 0; i < header.tbl_entry_num; i++) {
        /* support tbl_entry_size */
        if (!fread(buf, BLOCK_SIZE, 1, image_file)) {
            LOGE("Failed to read index entry:%d!", i);
            goto end;
        }
        memcpy(&entry, buf, sizeof(entry));

        if (memcmp(entry.tag, INDEX_TBL_ENTR_TAG, sizeof(entry.tag))) {
            LOGE("Something wrong with index entry:%d!", i);
            goto end;
        }
        /* switch for be. */
        fix_entry(&entry);

        printf("entry(%d):\n\tpath:%s\n\toffset:%d\tsize:%d\n", i, entry.path, entry.content_offset,
               entry.content_size);
        if (!dump_file(image_file, unpack_dir, entry)) {
            goto end;
        }
    }
    printf("Unack %s to %s successed!\n", image_path, unpack_dir);
    ret = true;
end:
    if (image_file) {
        fclose(image_file);
    }
    return ret ? 0 : -1;
}

/************unpack code end****************/
/************pack code****************/

static inline size_t get_file_size(const char *path)
{
    LOGD("try to get size(%s)...", path);
    struct stat st;
    if (stat(path, &st) < 0) {
        LOGE("Failed to get size:%s", path);
        return -1;
    }
    LOGD("path:%s, size:%ld", path, st.st_size);
    return st.st_size;
}

static int write_file(int offset_block, const char *src_path, char hash[], int hash_size)
{
    LOGD("try to write file(%s) to offset:%d...", src_path, offset_block);
    char *buf = NULL;
    int ret = -1;
    size_t file_size;
    FILE *src_file = fopen(src_path, "rb");
    if (!src_file) {
        LOGE("Failed to open:%s", src_path);
        goto end;
    }

    file_size = get_file_size(src_path);
    if (file_size < 0) {
        goto end;
    }

    buf = calloc(file_size, 1);
    if (!buf) {
        goto end;
    }

    if (!fread(buf, file_size, 1, src_file)) {
        goto end;
    }

    if (!write_data(offset_block, buf, file_size)) {
        goto end;
    }

    if (hash_size == 20) {
        sha1_csum((const unsigned char *)buf, file_size, (unsigned char *)hash);
    } else if (hash_size == 32) {
        sha256_csum((const unsigned char *)buf, file_size, (unsigned char *)hash);
    } else {
        goto end;
    }

    ret = file_size;
end:
    if (src_file) {
        fclose(src_file);
    }
    if (buf) {
        free(buf);
    }

    return ret;
}

static bool write_header(const int file_num)
{
    LOGD("try to write header...");
    memcpy(header.magic, RESOURCE_PTN_HDR_MAGIC, sizeof(header.magic));
    header.resource_ptn_version = RESOURCE_PTN_VERSION;
    header.index_tbl_version = INDEX_TBL_VERSION;
    header.header_size = RESOURCE_PTN_HDR_SIZE;
    header.tbl_offset = header.header_size;
    header.tbl_entry_size = INDEX_TBL_ENTR_SIZE;
    header.tbl_entry_num = file_num;

    /* switch for le. */
    resource_ptn_header hdr = header;
    fix_header(&hdr);
    return write_data(0, &hdr, sizeof(hdr));
}

static bool write_index_tbl(const int file_num, const char **files)
{
    LOGE("try to write index table...");
    bool ret = false;
    bool foundFdt = false;
    int offset = header.header_size + header.tbl_entry_size * header.tbl_entry_num;
    index_tbl_entry entry;
    char hash[20]; /* sha1 */
    int i;
    LOGE("write_index_tbl %d\n", file_num);
    memcpy(entry.tag, INDEX_TBL_ENTR_TAG, sizeof(entry.tag));
    for (i = 0; i < file_num; i++) {
        size_t file_size = get_file_size(files[i]);
        if (file_size < 0) {
            goto end;
        }
        entry.content_size = file_size;
        entry.content_offset = offset;

        if (write_file(offset, files[i], hash, sizeof(hash)) < 0) {
            goto end;
        }

        memcpy(entry.hash, hash, sizeof(hash));
        entry.hash_size = sizeof(hash);

        LOGE("try to write index entry(%s)...", files[i]);

        /* switch for le. */
        fix_entry(&entry);
        memset(entry.path, 0, sizeof(entry.path));
        const char *path = files[i];
        if (root_path[0]) {
            if (!strncmp(path, root_path, strlen(root_path))) {
                path += strlen(root_path);
                if (path[0] == '/') {
                    path++;
                }
            }
        }
        path = fix_path(path);
        if (!strcmp(files[i] + strlen(files[i]) - strlen(DTD_SUBFIX), DTD_SUBFIX)) {
            if (!foundFdt) {
                /* use default path. */
                LOGE("mod fdt path:%s -> %s...", files[i], FDT_PATH);
                path = FDT_PATH;
                foundFdt = true;
            }
        }
        snprintf(entry.path, sizeof(entry.path), "%s", path);
        offset += fix_blocks(file_size);
        if (!write_data(header.header_size + i * header.tbl_entry_size, &entry, sizeof(entry))) {
            goto end;
        }
    }
    ret = true;
end:
    return ret;
}

static int pack_image(int file_num, const char **files)
{
    bool ret = false;
    FILE *image_file = fopen(image_path, "wb");
    if (!image_file) {
        LOGE("Failed to create:%s", image_path);
        goto end;
    }
    fclose(image_file);

    /* prepare files */
    int i = 0;
    int pos = 0;
    const char *tmp;
    for (i = 0; i < file_num; i++) {
        if (!strcmp(files[i] + strlen(files[i]) - strlen(DTD_SUBFIX), DTD_SUBFIX)) {
            /* dtb files for kernel. */
            tmp = files[pos];
            files[pos] = files[i];
            files[i] = tmp;
            pos++;
        } else if (!strcmp(fix_path(image_path), fix_path(files[i]))) {
            /* not to pack image itself! */
            tmp = files[file_num - 1];
            files[file_num - 1] = files[i];
            files[i] = tmp;
            file_num--;
        }
    }

    if (!write_header(file_num)) {
        LOGE("Failed to write header!");
        goto end;
    }
    if (!write_index_tbl(file_num, files)) {
        LOGE("Failed to write index table!");
        goto end;
    }
    printf("Pack to %s successed!\n", image_path);
    ret = true;
end:
    return ret ? 0 : -1;
}

/************pack code end****************/