Stuff

spec.md

@@ -1,6 +1,6 @@
 # fLisp
 
-- S-expressions:
+- S-expressions:  
   `(<function> [arg0 ... argN])`  
   Will call function with optional args arg0-argN   
   `([*]<variable> [arg | *arg] [arg2])`  
@@ -20,102 +20,102 @@
   C : int x = a[0];
   ```
   For vectors and strings, it's a shallow copy (data is the same) unless a `*`  
-  is specified before [arg]
+  is specified before `[arg]`  
 
 - Compiled to bytecode  
 
 In this document :
-- <...> :
+- `<...>` :  
   Mandatory argument
-- [...] :
+- `[...]` :  
   Optional argument
-- | :
+- `|` :  
   Or
 ## Core types
 
-- null :
+- `null`:    
   Represents a null value - always evaluates to false
-- int :
+- `int`:  
   32 bit signed integer, evaluates to false if zero and true otherwise
-- fix :
+- `fix`:  
   16:16 bit fixed point signed integer, same evaluation rules as ints
-- float :
+- `float`:  
   32bit IEEE floating point value, same evaluation as ints (within  
   `FL_ESPILOǸ̀`)
-- str:
+- `str`:  
   ASCII character string - always evaluates to false
-- fn:
+- `fn`:  
   Function, function "variables" are inherently of type fn - handle with care !
-- vec :
-  Vectors of any type, 
+- `vec`:  
+  Vectors of any type 
 
 ## Core functions
 
-- `(var[:type] <name> [size])` :
+- `(var[:type] <name> [size])`:  
   Declares a global variable of optional type type and name name  
   if type is of format `:vec:<type>`, the variable will be a vector
   of type type, and optional size size (otherwise size 0)
   (if type isn't specified it is inferred)
 
-- `(let[:type] <name>)`:
+- `(let[:type] <name>)`:  
   Same as var, but variable is of local scope (recommended)
 
-- `(if <cond> [expressions])`:
+- `(if <cond> [expressions])`:  
   If cond evaluates to true, will execute optional expressions
 
-- `(else [expressions])`:
+- `(else [expressions])`:  
   Must follow a if, will execute if the if's cond evaluates to false 
 
-- `(while <cond> [expressions])`:
+- `(while <cond> [expressions])`:  
   while cond evalutates to true, will execute optional expressions 
 
-- `(fn (<name> [arg0[:type] ... argN[:type]]) [expressions])` :
+- `(fn (<name> [arg0[:type] ... argN[:type]]) [expressions])` :  
   Declares a function of name name, optional args arg0-argN with optional  
   types (recommended to explicit them), that executes optional expressions  
   The name cannot be a variable
 
-- `(import <lib0> [... libN])` :
+- `(import <lib0> [... libN])` :  
   Import the functions and variables from lib0-libN
 
-For the following numerical functions, values must be scalars (except + and =,
+For the following numerical functions, values must be scalars (except + and =,  
 where they may be strings), and of the same type
-- `(+ <a> <b>)`:
+- `(+ <a> <b>)`:  
   Returns a+b, if they are both strings they will be concatenated
 
-- `(- <a> <b>)`:
+- `(- <a> <b>)`:  
   Returns a-b
 
-- `(* <a> <b>)`:
+- `(* <a> <b>)`:  
   Returns a×b
 
-- `(/ <a> <b>)`:
+- `(/ <a> <b>)`:  
   Returns a/b
 
-- `(% <a> <b>)`:
+- `(% <a> <b>)`:  
   Returns a%b
 
-- `(< <a> <b>)`:
+- `(< <a> <b>)`:  
   Returns 1 if a < b, else 0
 
-- ̀`(<= <a> <b>)`:
+- ̀`(<= <a> <b>)`:  
   Returns 1 if a <= b, else 0
 
-- `(= <a> <b>)̀̀`:
+- `(= <a> <b>)̀̀`:  
   Returns 1 if a == b, else 0
 
-- `(>= <a> <b>)`:
+- `(>= <a> <b>)`:  
   Returns 1 if a >= b, else 0
 
-- `(> <a> <b>)`:
+- `(> <a> <b>)`:  
   Returns 1 if a > b, else 0
 
 ## console functions
-- `(input)`:
+- `(input)`:  
   Will try to get input from the user, returns it as a string
-- `(write <var>)`:
+- `(write <var>)`:  
   Will try to cast var to string then print it to the console
-- `(newline)`:
-  Will print a newline to the console (newline characters aren't escaped with
+- `(newline)`:  
+  Will print a newline to the console (newline characters aren't escaped with  
   write)
 
 ## gint functions
@@ -124,9 +124,9 @@ TODO
 
 # Bytecode
 
-- 8 byte Value :
+- 8 byte Value :  
   2 bytes tag, 6 bytes value itself
-- 4 byte bytecode ops:
+- 4 byte bytecode ops:  
   1 byte op, 3 byte args (named 1-3)
 
 ## Bytecode types
@@ -135,7 +135,7 @@ TODO
 - `T_Int` -> int
 - `T_Fix` -> fix
 - `T_Float` -> float
-- `T_Str` -> string :
+- `T_Str` -> string :  
   - If shorter than 4 chars (+ `\0`), is a "compact string"
   - Otherwise, gets converted to a vector, inherently of chars
 - `T_Fn` -> fn / function
@@ -169,7 +169,7 @@ if 1:2 / 1:2:3, means stitching 1,2,3 together as a 2 or 3 byte value
 - `popl` : pops the last #2 values on stack, starting from #1
 - `cst0` : 2:3 -> LSW of 3
 - `cst1` : 2:3 -> MSW of 3
-- `iter` : Iterates on vector 1, keeping track with int value at 2, and sets
-           int value at 3 to 1 when done
-           to 1
+- `iter` : Iterates on vector 1, keeping track with int value at 2, and sets  
+           int value at 3 to 1 when done  
+           to 1  
  

src/byte_defs.h

@@ -2,6 +2,8 @@
 
 #pragma once
 
+#define FL_EPSILON (1e-6f)
+
 enum OpTypes {
   OP_add   =  0,
   OP_sub   =  1,

src/main.c

@@ -4,6 +4,7 @@
 #include <string.h>
 
 #include "types.h"
+#include "byte_defs.h"
 
 int main(){