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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "xed-examples-util.h"

int main(int argc, char** argv);

    
#include "xed-interface.h"
#include "xed-ild.h"
#include "xed-get-time.h"


#define BUFLEN  1024
#define XDPRINT(x)     printf("%23s = %d\n", #x , i-> x );
#define XXPRINT(x)     printf("%23s = 0x%x\n", #x ,i-> x )
void print_ild(xed_decoded_inst_t* p) {

    char buf[BUFLEN];
    xed_chip_enum_t chip = xed_decoded_inst_get_input_chip(p);
    xed_decoded_inst_dump(p, buf,  BUFLEN);
    printf("%23s = %s\n", "chip",
           xed_chip_enum_t2str(chip));
}

#define MAX_INPUT_NIBBLES (XED_MAX_INSTRUCTION_BYTES*2)

int main(int argc, char** argv) {
    xed_decoded_inst_t ild;
    xed_uint_t uargc = (xed_uint_t)argc;
    xed_uint_t length = 0;
    xed_uint_t dlen = 0;    
    xed_uint_t i,j,input_nibbles=0;
    xed_uint8_t itext[XED_MAX_INSTRUCTION_BYTES];
    char src[MAX_INPUT_NIBBLES+1];
    xed_state_t dstate;
    xed_decoded_inst_t xedd;
    xed_uint_t first_argv;
    xed_uint_t bytes;
    xed_error_enum_t xed_error;
    xed_chip_enum_t chip = XED_CHIP_INVALID;
    int already_set_mode = 0;
    
    // initialize the XED tables -- one time.
    xed_tables_init();

    xed_state_zero(&dstate);

    first_argv = 1;
    dstate.mmode=XED_MACHINE_MODE_LEGACY_32;
    dstate.stack_addr_width=XED_ADDRESS_WIDTH_32b;

    for(i=1;i< uargc;i++) {
        if (strcmp(argv[i], "-64") == 0) {
            assert(already_set_mode == 0);
            already_set_mode = 1;
            dstate.mmode=XED_MACHINE_MODE_LONG_64;
            first_argv++;
        }
        else if (strcmp(argv[i], "-16") == 0) {
            assert(already_set_mode == 0);
            already_set_mode = 1;
            dstate.mmode=XED_MACHINE_MODE_LEGACY_16;
            dstate.stack_addr_width=XED_ADDRESS_WIDTH_16b;
            first_argv++;
        }
        else if (strcmp(argv[i], "-s16") == 0) {
            already_set_mode = 1;
            dstate.stack_addr_width=XED_ADDRESS_WIDTH_16b;
            first_argv++;
        }
        else if (strcmp(argv[i], "-chip") == 0) {
            assert(i+1 < uargc);
            chip = str2xed_chip_enum_t(argv[i+1]);
            printf("Setting chip to %s\n", xed_chip_enum_t2str(chip));
            assert(chip != XED_CHIP_INVALID);
            first_argv+=2;
        }

    }

    assert(first_argv < uargc);

    xed_decoded_inst_zero_set_mode(&xedd, &dstate);

    if (first_argv >= uargc) {
      printf("Need some hex instruction nibbles");
      exit(1);
    }
    
    for(i=first_argv;i<uargc;i++) { 
      for(j=0;argv[i][j];j++) {
        assert(input_nibbles < MAX_INPUT_NIBBLES);
        src[input_nibbles] = argv[i][j];
        input_nibbles++;
      }
    }
    src[input_nibbles] = 0;
    if (input_nibbles & 1) {
      printf("Need an even number of nibbles");
      exit(1);
    }

    bytes = xed_convert_ascii_to_hex(src, itext, XED_MAX_INSTRUCTION_BYTES);
                            
    printf("Attempting to decode: ");
    for(i=0;i<bytes;i++) {
      printf("%02x", itext[i]);
    }
    printf("\n");

    xed_decoded_inst_zero_set_mode(&ild, &dstate);
    xed_decoded_inst_set_input_chip(&ild, chip);
    xed_decode(&ild, itext, XED_MAX_INSTRUCTION_BYTES);
    length = xed_decoded_inst_get_length(&ild);

    print_ild(&ild);
    printf("ILD length = %d\n",length);


    xed_decoded_inst_set_input_chip(&xedd, chip);
    xed_error = xed_decode(&xedd, 
                           XED_REINTERPRET_CAST(const xed_uint8_t*,itext), 
                           bytes);

    switch(xed_error)    {
      case XED_ERROR_NONE:
        break;
      case XED_ERROR_BUFFER_TOO_SHORT:
        printf("Not enough bytes provided\n");
        exit(1);
      case XED_ERROR_INVALID_FOR_CHIP:
        printf("The instruction was not valid for the specified chip.\n");
        exit(1);
      case XED_ERROR_GENERAL_ERROR:
        printf("Could not decode given input.\n");
        exit(1);
      default:
        printf("Unhandled error code %s\n",xed_error_enum_t2str(xed_error));
        exit(1);
    }
        
    dlen =  xed_decoded_inst_get_length(&xedd);
    printf ("Traditional length =  %d\n", dlen);
    if (dlen != length) {
      printf ("Length error\n");
      exit(1);
    }
    printf ("Length matched\n");
    return 0;
}

