Help with code(Binary to Hex)

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  1. #1
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    Help with code(Binary to Hex)

    I need to write a program that reads a binary file and writes the file to a text file in ASCII Hex format.

    I also need each line to be 16 bytes long or 32 characters like this:
    :100000002345a42d etc.


    ":" is start of new line
    "10" is number of bytes converted (in this case 16)
    "0000" is 16 bit address of the first byte (next line will be 0010)
    "00" is page number (always 00 for this assignment)

    NEXT 32 characters represent 16 binary bytes

    AT the end there must be a check sum byte ( the 2's complement of all the bytes in the line without colon.


    This is the program that I have written. I have problem inserting all the numbers before my 32 characters and also the check sum. Also the last line could have less than 16 bytes so I need to include that too. All the work has to be done in processFiles function.


    #include <stdio.h>
    #include <stdlib.h>
    #include <conio.h>
    #include <string.h>

    long int getFileSize(FILE *file);
    void getFilenames(char inf[],char outf[]);
    void processFiles(FILE *source,FILE *dest,long int fsize);
    void convertToASCII(char ch,char *no1,char *no2);
    char conv2Ascii(char no);


    void main()
    {
    FILE *f1,*f2;
    char infile[30],outfile[30];
    long int fsize;


    getFilenames(infile,outfile);


    if (f1 = fopen(infile ,"rb"))
    {

    f2 = fopen(outfile ,"wb");
    fsize=getFileSize(f1);
    processFiles(f1,f2,fsize);
    fclose(f1);
    fclose(f2);
    }
    else
    perror("outfile");
    }

    void getFilenames(char inf[],char outf[])
    {


    printf("Enter the binary file name :");
    scanf("%s",inf);
    printf("Enter the text file name :");
    scanf("%s",outf);
    }

    void processFiles(FILE *source,FILE *dest,long int fsize)
    {
    long int i=0,count=0,j;
    char buffer[61], a,b, input;



    while (fsize>0)
    {

    input=getc(source);


    {
    convertToASCII(input,&a,&b);

    buffer[i++]=a;
    buffer[i++]=b;
    count++;

    if ((count%16) == 0)
    {
    i=0;
    for(j=1; j<=32; j++)
    fprintf(dest,"%c",buffer[j]);

    fprintf(dest,"\n\0");

    }
    }
    fsize--;
    }
    }





    long int getFileSize(FILE *fptr)
    {
    long int size;

    fseek(fptr,0L,SEEK_END);
    size = ftell(fptr);
    rewind(fptr);

    return size;
    }

    void convertToASCII(char ch,char *no1,char *no2)
    {
    char a,b;


    a=((ch>>4) & 0x0f);
    b=(ch & 0x0f);
    *no1=conv2Ascii(a);
    *no2=conv2Ascii(b);

    }
    char conv2Ascii(char no)
    {

    if (no<=9)
    no = no+'0';
    else
    no = no-10+'A';
    return no;
    }

  2. #2
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    Join Date
    Sep 2001
    Posts
    1,765
    > void main()
    Yes Alex, what is wrong?
    Alex: Correct!

    > #include <conio.h>
    This is not ANSI standard.

    Use code tags.
    The world is waiting. I must leave you now.

  3. #3
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    Posts
    14,826
    void convertToASCII(char ch,char *no1,char *no2)
    {
    char a,b;


    a=((ch>>4) & 0x0f);
    b=(ch & 0x0f);
    *no1=conv2Ascii(a);
    *no2=conv2Ascii(b);

    }
    char conv2Ascii(char no)
    {

    if (no<=9)
    no = no+'0';
    else
    no = no-10+'A';
    return no;
    }
    It seems to me that you could save yourself a lot of trouble by including <ctype.h> and using "isalnum" and check your values that way.

    Quzah.
    Hope is the first step on the road to disappointment.

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