Topic: BTCD is no more - page 468. (Read 1328490 times)

int32_t add_opcode(char *hex,int32_t offset,int32_t opcode)
{
    hex[offset + 0] = hexbyte((opcode >> 4) & 0xf);
    hex[offset + 1] = hexbyte(opcode & 0xf);
    return(offset+2);
}

int32_t convert_to_bitcoinhex(char *scriptasm)
{
#define OP_HASH160_OPCODE 0xa9
#define OP_PUSHDATA1 0x4c
#define OP_EQUAL_OPCODE 0x87
    //"asm" : "OP_HASH160 db7f9942da71fd7a28f4a4b2e8c51347240b9e2d OP_EQUAL",
    char *hex;
    int32_t middlelen,offset,len,OP_HASH160_len,OP_EQUAL_len;
    len = (int32_t)strlen(scriptasm);
    // worlds most silly assembler!
    OP_HASH160_len = strlen("OP_HASH160");
    OP_EQUAL_len = strlen("OP_EQUAL");
    if ( strncmp(scriptasm,"OP_HASH160",OP_HASH160_len) == 0 && strncmp(scriptasm+len-OP_EQUAL_len,"OP_EQUAL",OP_EQUAL_len) == 0 )
    {
        hex = calloc(1,len+1);
        offset = 0;
        offset = add_opcode(hex,offset,OP_HASH160_OPCODE);
        offset = add_opcode(hex,offset,OP_PUSHDATA1);
        middlelen = len - OP_HASH160_len - OP_EQUAL_len - 2;
        offset = add_opcode(hex,offset,middlelen/2);
        memcpy(hex+6,scriptasm+OP_HASH160_len+1,middlelen);
        hex[6+middlelen] = hexbyte((OP_EQUAL_OPCODE >> 4) & 0xf);
        hex[6+middlelen+1] = hexbyte(OP_EQUAL_OPCODE & 0xf);
        hex[6+middlelen+2] = 0;
        printf("(%s) -> (%s)\n",scriptasm,hex);
        strcpy(scriptasm,hex);
        free(hex);
        return((int32_t)(2+middlelen+2));
    }
    else
    {
       // printf("cant assembly anything but OP_HASH160 + + OP_EQUAL (%s)\n",scriptasm);
    }
    return(-1);
}