How Can a Machine Reads a Compiler Since A Compiler is Written in Text! Not Binaries? Post: 302257985

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Top Forums Programming How Can a Machine Reads a Compiler Since A Compiler is Written in Text! Not Binaries? Post 302257985 by f.ben.isaac on Thursday 13th of November 2008 01:41:50 PM

11-13-2008

Registered User

Quote:

Originally Posted by jim mcnamara

You are asking the chicken & egg question - which comes first?
You can write a binary executable directly in hex, so very early assemblers (which are compilers) were written that way. There also were link editors as well. ld for example.

I like Corona's explanation. I think at one time I read that as well.

Most compilers are based on lex & yacc. Read about those.

>>You can write a binary executable directly in hex,

And HEX, so what translates these hexes to binaries for the compiler?
If a agree with you, writing in binary 1 & 0 will make machine understand what do you want to do! There has to be convertion between hexes to binaries and since hex is not binaries, what does the conversion! Machine does not giva a damn to anything else except if there is another binary written as a translator who translates hexes back to binary. Any idea?

I'm very new to this, i ask in a very dummy questions to know the basics - only overview, no technical stuff....

THANKS

f.ben.isaac

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gnutls_hex2bin

gnutls_hex2bin(3)						      gnutls							 gnutls_hex2bin(3)

NAME

       gnutls_hex2bin - convert hex string into binary buffer.

SYNOPSIS

       #include <gnutls/gnutls.h>

       int gnutls_hex2bin(const char * hex_data, size_t hex_size, char * bin_data, size_t * bin_size);

ARGUMENTS

       const char * hex_data
		   string with data in hex format

       size_t hex_size
		   size of hex data

       char * bin_data
		   output array with binary data

       size_t * bin_size
		   when calling *bin_size should hold size of bin_data, on return will hold actual size of bin_data.

DESCRIPTION

       Convert a buffer with hex data to binary data.

RETURNS

       GNUTLS_E_SUCCESS on success, otherwise an error.

SINCE

       2.4.0

REPORTING BUGS

       Report	bugs   to   <bug-gnutls@gnu.org>.   GnuTLS  home  page:  http://www.gnu.org/software/gnutls/  General  help  using  GNU  software:
       http://www.gnu.org/gethelp/

COPYRIGHT

       Copyright (C) 2008 Free Software Foundation.
       Copying and distribution of this file, with or without modification, are permitted in any medium without  royalty  provided  the  copyright
       notice and this notice are preserved.

SEE ALSO

       The  full documentation for gnutls is maintained as a Texinfo manual.  If the info and gnutls programs are properly installed at your site,
       the command

	      info gnutls

       should give you access to the complete manual.

gnutls								       2.8.6							 gnutls_hex2bin(3)

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gnutls_hex2bin