added more globals and functions

This commit is contained in:
Valerie Wolfe 2022-06-26 02:25:13 -04:00
parent b086186949
commit b73ef17d8d
3 changed files with 78 additions and 10 deletions

View file

@ -1,3 +1,6 @@
pub const EULER: f64 = 2.718;
pub const PI: f64 = 3.14;
pub const EULER: f64 = 2.718281828459045;
pub const GOLDEN_RATIO: f64 = 1.618033988749895;
pub const PI: f64 = 3.141592653589793;
pub const ROOT_TWO: f64 = 1.414213562373095;

View file

@ -6,6 +6,58 @@ use evalexpr::{
use crate::util;
// Mathematics
pub fn logarithm(arg: &Value) -> Result<Value, EvalexprError> {
let arguments: Vec<Value>;
let count: usize;
if arg.is_tuple() {
arguments = arg.as_tuple()?;
count = arguments.len();
} else if arg.is_float() {
arguments = vec!(arg.as_float()?.into());
count = 1;
} else if arg.is_int() {
arguments = vec!((arg.as_int()? as f64).into());
count = 1;
} else {
return Err(EvalexprError::CustomMessage("Expected numbers".to_string()));
}
let output: Value;
match count {
1 => {
let argument = &arguments[0];
if !argument.is_number() {
return Err(EvalexprError::CustomMessage("Expected number".to_string()));
}
let number = if argument.is_float() { argument.as_float()? } else { argument.as_int()? as f64 };
output = number.ln().into();
},
2 => {
let arg_value = &arguments[0];
let arg_base = &arguments[1];
if !(arg_value.is_number() && arg_base.is_number()) {
return Err(EvalexprError::CustomMessage("Expected two numbers".to_string()));
}
let value: f64 = if arg_value.is_float() { arg_value.as_float()? } else { arg_value.as_int()? as f64 };
let base: f64 = if arg_base.is_float() { arg_base.as_float()? } else { arg_base.as_int()? as f64 };
output = value.log(base).into();
},
_ => {
return Err(EvalexprError::WrongFunctionArgumentAmount { expected: 2, actual: count });
}
}
return Ok(output);
}
pub fn square_root(arg: &Value) -> Result<Value, EvalexprError> {
if !arg.is_number() {
return Err(EvalexprError::CustomMessage("Expected a number.".to_string()));
}
let value: f64 = if arg.is_float() { arg.as_float()? } else { arg.as_int()? as f64 };
return Ok(value.sqrt().into());
}
// Data Science
pub fn average(arg: &Value) -> Result<Value, EvalexprError> {
let arguments = arg.as_tuple()?;

View file

@ -14,7 +14,9 @@ use evalexpr::{
eval_with_context_mut,
HashMapContext,
Value
Value,
Context
};
use termion::{
color,
@ -25,13 +27,19 @@ mod global;
mod helper;
mod util;
pub const VERSION: &str = "0.1.5";
pub const VERSION: &str = "0.2.0";
fn main() {
let mut context = context_map! {
// globals
"e" => global::EULER,
"phi" => global::GOLDEN_RATIO,
"pi" => global::PI,
"√2" => global::ROOT_TWO,
// math functions
"log" => Function::new(|arg| helper::logarithm(arg)),
"sqrt" => Function::new(|arg| helper::square_root(arg)),
// data science functions
"avg" => Function::new(|arg| helper::average(arg)),
@ -39,7 +47,12 @@ fn main() {
// radix functions
"bin" => Function::new(|arg| helper::binary(arg)),
"hex" => Function::new(|arg| helper::hexadecimal(arg)),
"oct" => Function::new(|arg| helper::octal(arg))
"oct" => Function::new(|arg| helper::octal(arg)),
// character aliases
"ϕ" => global::GOLDEN_RATIO,
"π" => global::PI,
"" => Function::new(|arg| helper::square_root(arg))
}.unwrap();
let expressions: Vec<String> = env::args().skip(1).collect();
if expressions.len() == 0 {