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-rw-r--r--src/main.rs37
1 files changed, 31 insertions, 6 deletions
diff --git a/src/main.rs b/src/main.rs
index 140150c..ea9e65a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -41,9 +41,10 @@ lazy_static! {
41} 41}
42 42
43fn main() { 43fn main() {
44 env_logger::init();
44 if !CONFIGURATION.input.is_empty() { 45 if !CONFIGURATION.input.is_empty() {
45 // command mode // 46 // command mode //
46 let evaled = eval_math_expression(&CONFIGURATION.input[..], 0f64); 47 let evaled = eval_math_expression(&CONFIGURATION.input[..], Some(0.));
47 match evaled { 48 match evaled {
48 Ok(ans) => pprint(ans), 49 Ok(ans) => pprint(ans),
49 Err(e) => { 50 Err(e) => {
@@ -57,17 +58,26 @@ fn main() {
57 let mut rl = create_readline(); 58 let mut rl = create_readline();
58 59
59 // previous answer 60 // previous answer
60 let mut prev_ans = 0f64; 61 let mut prev_ans = None;
61 62
62 // handle history storage 63 // handle history storage
63 let eva_dirs = ProjectDirs::from("com", "NerdyPepper", "eva").unwrap(); 64 let eva_dirs = ProjectDirs::from("com", "NerdyPepper", "eva").unwrap();
64 let eva_data_dir = eva_dirs.data_dir(); 65 let eva_data_dir = eva_dirs.data_dir();
65 let mut history_path = PathBuf::from(eva_data_dir); 66 let mut history_path = PathBuf::from(eva_data_dir);
67 let mut previous_ans_path = PathBuf::from(eva_data_dir);
66 match create_dir_all(eva_data_dir) { 68 match create_dir_all(eva_data_dir) {
67 Ok(_) => history_path.push("history.txt"), 69 Ok(_) => {
68 Err(_) => history_path = PathBuf::from(UserDirs::new().unwrap().home_dir()), 70 history_path.push("history.txt");
71 previous_ans_path.push("previous_ans.txt");
72 },
73 Err(_) => {
74 history_path = PathBuf::from(UserDirs::new().unwrap().home_dir());
75 previous_ans_path = PathBuf::from(UserDirs::new().unwrap().home_dir());
76 }
69 }; 77 };
70 78
79 std::fs::write(&previous_ans_path, "0");
80
71 if rl.load_history(history_path.as_path()).is_err() { 81 if rl.load_history(history_path.as_path()).is_err() {
72 println!("No previous history.") 82 println!("No previous history.")
73 }; 83 };
@@ -81,7 +91,17 @@ fn main() {
81 let evaled = eval_math_expression(&line[..], prev_ans); 91 let evaled = eval_math_expression(&line[..], prev_ans);
82 match evaled { 92 match evaled {
83 Ok(ans) => { 93 Ok(ans) => {
84 prev_ans = ans; 94 use std::io::Write;
95 use std::fs::OpenOptions;
96 let mut file = OpenOptions::new()
97 .write(true)
98 .create(true)
99 .open(&previous_ans_path)
100 .unwrap();
101
102 prev_ans = Some(ans);
103 writeln!(file, "{}", ans);
104
85 pprint(ans); 105 pprint(ans);
86 } 106 }
87 Err(e) => println!("{}", handler(e)), 107 Err(e) => println!("{}", handler(e)),
@@ -148,7 +168,7 @@ fn parse_arguments() -> Configuration {
148 } 168 }
149} 169}
150 170
151pub fn eval_math_expression(input: &str, prev_ans: f64) -> Result<f64, CalcError> { 171pub fn eval_math_expression(input: &str, prev_ans: Option<f64>) -> Result<f64, CalcError> {
152 let input = input.trim(); 172 let input = input.trim();
153 let input = input.replace(" ", ""); 173 let input = input.replace(" ", "");
154 if input.is_empty() { 174 if input.is_empty() {
@@ -203,4 +223,9 @@ mod tests {
203 let evaled = eval_math_expression("_ + 9", 9f64).unwrap(); 223 let evaled = eval_math_expression("_ + 9", 9f64).unwrap();
204 assert_eq!(18.0, evaled); 224 assert_eq!(18.0, evaled);
205 } 225 }
226 #[test]
227 fn eval_with_zero_prev() {
228 let evaled = eval_math_expression("9 + _ ", 0f64).unwrap();
229 assert_eq!(9., evaled);
230 }
206} 231}