Phase 10.7/10.5c: include cycle detection (VM/Interpreter), minimal pyc IR→Nyash, String unification bridge (VM partial), add core plugins: RegexBox/EncodingBox/TOMLBox/PathBox + examples; wire nyash.toml; begin String interop for internal vs plugin boxes; update CURRENT_TASK.md

plugins/nyash-regex-plugin/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "nyash-regex-plugin"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "staticlib"]
+
+[dependencies]
+once_cell = "1.20"
+regex = "1.10"
+

plugins/nyash-regex-plugin/src/lib.rs

@@ -0,0 +1,120 @@
+//! Nyash RegexBox Plugin - Minimal regex support (compile + match/find/replace/split)
+
+use once_cell::sync::Lazy;
+use regex::Regex;
+use std::collections::HashMap;
+use std::sync::{Mutex, atomic::{AtomicU32, Ordering}};
+
+// Error/status codes aligned with other plugins
+const OK: i32 = 0;
+const E_SHORT: i32 = -1;
+const E_TYPE: i32 = -2;
+const E_METHOD: i32 = -3;
+const E_ARGS: i32 = -4;
+const E_PLUGIN: i32 = -5;
+const E_HANDLE: i32 = -8;
+
+// Methods
+const M_BIRTH: u32 = 0;       // birth(pattern?) -> instance
+const M_COMPILE: u32 = 1;     // compile(pattern) -> self (new compiled)
+const M_IS_MATCH: u32 = 2;    // isMatch(text) -> bool
+const M_FIND: u32 = 3;        // find(text) -> String (first match or empty)
+const M_REPLACE_ALL: u32 = 4; // replaceAll(text, repl) -> String
+const M_SPLIT: u32 = 5;       // split(text, limit) -> String (joined by '\n') minimal
+const M_FINI: u32 = u32::MAX; // fini()
+
+// Assign an unused type id (see nyash.toml [box_types])
+const TYPE_ID_REGEX: u32 = 52;
+
+struct RegexInstance { re: Option<Regex> }
+
+static INST: Lazy<Mutex<HashMap<u32, RegexInstance>>> = Lazy::new(|| Mutex::new(HashMap::new()));
+static NEXT_ID: AtomicU32 = AtomicU32::new(1);
+
+#[no_mangle]
+pub extern "C" fn nyash_plugin_abi() -> u32 { 1 }
+
+#[no_mangle]
+pub extern "C" fn nyash_plugin_init() -> i32 { OK }
+
+#[no_mangle]
+pub extern "C" fn nyash_plugin_invoke(
+    type_id: u32,
+    method_id: u32,
+    instance_id: u32,
+    args: *const u8,
+    args_len: usize,
+    result: *mut u8,
+    result_len: *mut usize,
+) -> i32 {
+    if type_id != TYPE_ID_REGEX { return E_TYPE; }
+    unsafe {
+        match method_id {
+            M_BIRTH => {
+                if result_len.is_null() { return E_ARGS; }
+                if preflight(result, result_len, 4) { return E_SHORT; }
+                let id = NEXT_ID.fetch_add(1, Ordering::Relaxed);
+                // Optional pattern in arg0
+                let inst = if let Some(pat) = read_arg_string(args, args_len, 0) {
+                    match Regex::new(&pat) { Ok(re) => RegexInstance { re: Some(re) }, Err(_) => RegexInstance { re: None } }
+                } else { RegexInstance { re: None } };
+                if let Ok(mut m) = INST.lock() { m.insert(id, inst); } else { return E_PLUGIN; }
+                let b = id.to_le_bytes(); std::ptr::copy_nonoverlapping(b.as_ptr(), result, 4); *result_len = 4; OK
+            }
+            M_FINI => { if let Ok(mut m) = INST.lock() { m.remove(&instance_id); OK } else { E_PLUGIN } }
+            M_COMPILE => {
+                let pat = match read_arg_string(args, args_len, 0) { Some(s) => s, None => return E_ARGS };
+                if let Ok(mut m) = INST.lock() { if let Some(inst) = m.get_mut(&instance_id) { inst.re = Regex::new(&pat).ok(); OK } else { E_HANDLE } } else { E_PLUGIN }
+            }
+            M_IS_MATCH => {
+                let text = match read_arg_string(args, args_len, 0) { Some(s) => s, None => return E_ARGS };
+                if let Ok(m) = INST.lock() { if let Some(inst) = m.get(&instance_id) { if let Some(re) = &inst.re { return write_tlv_bool(re.is_match(&text), result, result_len); } else { return write_tlv_bool(false, result, result_len); } } else { return E_HANDLE; } } else { return E_PLUGIN; }
+            }
+            M_FIND => {
+                let text = match read_arg_string(args, args_len, 0) { Some(s) => s, None => return E_ARGS };
+                if let Ok(m) = INST.lock() { if let Some(inst) = m.get(&instance_id) { if let Some(re) = &inst.re { let s = re.find(&text).map(|m| m.as_str().to_string()).unwrap_or_else(|| "".to_string()); return write_tlv_string(&s, result, result_len); } else { return write_tlv_string("", result, result_len); } } else { return E_HANDLE; } } else { return E_PLUGIN; }
+            }
+            M_REPLACE_ALL => {
+                let text = match read_arg_string(args, args_len, 0) { Some(s) => s, None => return E_ARGS };
+                let repl = match read_arg_string(args, args_len, 1) { Some(s) => s, None => return E_ARGS };
+                if let Ok(m) = INST.lock() { if let Some(inst) = m.get(&instance_id) { if let Some(re) = &inst.re { let out = re.replace_all(&text, repl.as_str()).to_string(); return write_tlv_string(&out, result, result_len); } else { return write_tlv_string(&text, result, result_len); } } else { return E_HANDLE; } } else { return E_PLUGIN; }
+            }
+            M_SPLIT => {
+                let text = match read_arg_string(args, args_len, 0) { Some(s) => s, None => return E_ARGS };
+                let limit = read_arg_i64(args, args_len, 1).unwrap_or(0);
+                if let Ok(m) = INST.lock() { if let Some(inst) = m.get(&instance_id) { if let Some(re) = &inst.re { let mut parts: Vec<String> = if limit > 0 { re.splitn(&text, limit as usize).map(|s| s.to_string()).collect() } else { re.split(&text).map(|s| s.to_string()).collect() }; let out = parts.join("\n"); return write_tlv_string(&out, result, result_len); } else { return write_tlv_string(&text, result, result_len); } } else { return E_HANDLE; } } else { return E_PLUGIN; }
+            }
+            _ => E_METHOD,
+        }
+    }
+}
+
+fn preflight(result: *mut u8, result_len: *mut usize, needed: usize) -> bool {
+    unsafe { if result_len.is_null() { return false; } if result.is_null() || *result_len < needed { *result_len = needed; return true; } }
+    false
+}
+fn write_tlv_result(payloads: &[(u8, &[u8])], result: *mut u8, result_len: *mut usize) -> i32 {
+    if result_len.is_null() { return E_ARGS; }
+    let mut buf: Vec<u8> = Vec::with_capacity(4 + payloads.iter().map(|(_,p)| 4 + p.len()).sum::<usize>());
+    buf.extend_from_slice(&1u16.to_le_bytes()); buf.extend_from_slice(&(payloads.len() as u16).to_le_bytes());
+    for (tag, payload) in payloads { buf.push(*tag); buf.push(0); buf.extend_from_slice(&(payload.len() as u16).to_le_bytes()); buf.extend_from_slice(payload); }
+    unsafe { let needed = buf.len(); if result.is_null() || *result_len < needed { *result_len = needed; return E_SHORT; } std::ptr::copy_nonoverlapping(buf.as_ptr(), result, needed); *result_len = needed; }
+    OK
+}
+fn write_tlv_i64(v: i64, result: *mut u8, result_len: *mut usize) -> i32 { write_tlv_result(&[(3u8, &v.to_le_bytes())], result, result_len) }
+fn write_tlv_bool(v: bool, result: *mut u8, result_len: *mut usize) -> i32 { write_tlv_result(&[(1u8, &[if v {1u8} else {0u8}])], result, result_len) }
+fn write_tlv_string(s: &str, result: *mut u8, result_len: *mut usize) -> i32 { write_tlv_result(&[(6u8, s.as_bytes())], result, result_len) }
+
+fn read_arg_i64(args: *const u8, args_len: usize, n: usize) -> Option<i64> {
+    if args.is_null() || args_len < 4 { return None; }
+    let buf = unsafe { std::slice::from_raw_parts(args, args_len) };
+    let mut off = 4usize; for i in 0..=n { if buf.len() < off + 4 { return None; } let tag = buf[off]; let size = u16::from_le_bytes([buf[off+2], buf[off+3]]) as usize; if buf.len() < off + 4 + size { return None; } if i == n { if tag != 3 || size != 8 { return None; } let mut b=[0u8;8]; b.copy_from_slice(&buf[off+4..off+12]); return Some(i64::from_le_bytes(b)); } off += 4 + size; }
+    None
+}
+fn read_arg_string(args: *const u8, args_len: usize, n: usize) -> Option<String> {
+    if args.is_null() || args_len < 4 { return None; }
+    let buf = unsafe { std::slice::from_raw_parts(args, args_len) };
+    let mut off = 4usize; for i in 0..=n { if buf.len() < off + 4 { return None; } let tag = buf[off]; let size = u16::from_le_bytes([buf[off+2], buf[off+3]]) as usize; if buf.len() < off + 4 + size { return None; } if i == n { if tag == 6 || tag == 7 { let s = String::from_utf8_lossy(&buf[off+4..off+4+size]).to_string(); return Some(s); } else { return None; } } off += 4 + size; }
+    None
+}
+