1 files changed, 47 insertions, 0 deletions
diff --git a/src/logs.rs b/src/logs.rs
new file mode 100644
index 0000000..dc1dfc1
--- /dev/null
+++ b/src/logs.rs
@@ -0,0 +1,47 @@
+use std::sync::OnceLock;
+use std::collections::HashSet;
+
+#[derive(Debug, PartialEq, Hash, Eq)]
+pub enum LogLevel {
+    Infos,
+    Debug,
+    OpcodeDump,
+    HaltCycles,
+    Error,
+}
+
+static LOG_LEVEL: OnceLock<HashSet<LogLevel>> = OnceLock::new();
+
+pub fn set_log_level(verbosity: String) {
+    let mut set: HashSet<LogLevel> = HashSet::new();
+    for level in verbosity.split(",") {
+        match level {
+            "infos" => { set.insert(LogLevel::Infos); },
+            "debug" => { set.insert(LogLevel::Debug); },
+            "opcode_dump" => { set.insert(LogLevel::OpcodeDump); },
+            "halt_cycles" => { set.insert(LogLevel::HaltCycles); },
+            "errors" => { set.insert(LogLevel::Error); },
+            "none" => {},
+            _ => panic!("Unknown log level \"{}\"", level),
+        }
+    }
+    if let Err(value) = LOG_LEVEL.set(set) {
+        panic!("Log level is already set with value {:?}", value);
+    }
+}
+
+pub fn log(level: LogLevel, s: String) {
+    if let Some(set) = LOG_LEVEL.get() {
+        if set.contains(&level) {
+            println!("[{:?}] {}", level, s);
+        }
+    }
+}
+
+pub fn elog(level: LogLevel, s: String) {
+    if let Some(set) = LOG_LEVEL.get() {
+        if set.contains(&level) {
+            eprintln!("[{:?}] {}", level, s);
+        }
+    }
+}