FCC - A FASM compiler for a language inspired by James Newton

JNC is a minimal compiler that supports a language inspired by James Newton.
It generates assembly code for the FASM assembler.
There are 26 built-in "registers", A-Z.
Each "register" has a stack associated with it.
NOTE: this is a work in progress!

Grammar

The grammar of language in EBNF is below.
NOTE: I am not very familiar with EBNF, so this may not be 100% accurate.

  <program>    ::= <defs>
  <defs>       ::= <defs> <def> | <def>
  <def>        ::= <func_def> | <int-def> | <char-def>
  <func-def>   ::= "def" <id> <statements> "end" |
  <int-def>    ::= "int" <id> ";" | "int" <id> "[" <num> "]" ";"
  <char-def>   ::= "char" <id> ";" | "char" <id> "[" <num> "]" ";"
  <statements> ::= <statements> <statement> | <statement> | <nothing>
  <statement>  ::= "if" <paren_expr> "then" <statements> "end" |
                   "if" <paren_expr> "then" <statements> "else" <statements> "end" |
                   "while" <paren_expr> <statements> "end" |
                   <func-call> ";" |
                   "return" <expr> ";" | "return" ";" |
                   <id-reg> "=" <expr> ";" |
                   <id-reg> "[" <expr> "]" "=" <expr> ";"
                   <id-reg> "++" ";" |
                   <id-reg> "--" ";" |
                   <id-reg> "+=" <expr> ";" |
                   <reg> ""
                   "//" |
                   <nothing>
  <func-call>  ::= <id> "(" ")"
  <expr>       ::= <term> | <term> <op> <term>
  <term>       ::= <id> | <num> | <string> | <reg> <reg-op>
  <id-reg>     ::= <id> | <reg>*
  <id>         ::= <alpha><alpha-numeric>*
  <reg>        ::= [A-Z]
  <num>        ::= [0-9]*
  <string>     ::= '"' <chars> '"'
  <op>         ::= <math-op> | <test-op> | <bin-op>
  <reg-op>     ::= one of (++ -- << >>)
  <math-op>    ::= one of (+ - * /)
  <test-op>    ::= one of (< == > !=)
  <bin-op>     ::= one of (& | ^)
  <paren_expr> ::= "(" <expr> ")"
  <nothing>    ::= 

The main program is jn.c. An example source file is test.jn, and it's result is test.asm.

Running:

make jnc 
make test

TODO:

• Update tc to generate FASM code that generates an executable.
• Create a simple emulator (vm) that can run a useful subset of Linux.
• Optimize the code generated by jnc.c.
• Enhance jnc to the point where it can build itself.
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