advent of code day 1

README.md

@@ -17,7 +17,7 @@ func main[] : I64
 
     while true
         io.println("Guess a number: ")
-        let guess: I64 = io.read_stdin() |> str.trim() |> str.parse_i64()
+        let guess: I64 = io.read_line() |> str.trim() |> str.parse_i64()
 
         if guess == answer
             io.println("You win!")

examples/guess_number.zr

@@ -3,7 +3,7 @@ func main[] : I64
 
     while true
         io.println("Guess a number: ")
-        let guess: I64 = io.read_stdin() |> str.trim() |> str.parse_i64()
+        let guess: I64 = io.read_line() |> str.trim() |> str.parse_i64()
 
         if guess == answer
             io.println("You win!")

examples/puzzles/aoc2025_01.zr

@@ -0,0 +1,53 @@
+func part1[lines: Array] : Void
+    let password: I64 = 0
+    let dial: I64 = 50
+
+    for i in 0..array.size(lines)
+        let line: String = array.nth(lines, i)
+        let dir: U8 = line[0]
+        let n: I64 = str.substr(line, 1, str.len(line) - 1) |> str.parse_i64()
+
+        if dir == 'L'
+            dial = dial - n
+            while dial < 0
+                dial = 100 + dial
+        else
+            dial = dial + n
+            while dial >= 100
+                dial = dial - 100
+
+        if dial == 0
+            password = password + 1
+    
+    io.println_i64(password)
+
+func part2[lines: Array] : Void
+    let password: I64 = 0
+    let dial: I64 = 50
+
+    for i in 0..array.size(lines)
+        let line: String = array.nth(lines, i)
+        let dir: U8 = line[0]
+        let n: I64 = str.substr(line, 1, str.len(line) - 1) |> str.parse_i64()
+
+        if dir == 'L'
+            for i in 0..n
+                dial = dial - 1
+                if dial == 0
+                    password = password + 1
+                if dial == -1
+                    dial = 99
+        else
+            for i in 0..n
+                dial = dial + 1
+                if dial == 100
+                    dial = 0
+                    password = password + 1
+    
+    io.println_i64(password)
+
+func main[] : I64
+    let lines: Array = io.read_file("input.txt") |> str.split("\n")
+
+    part1(lines)
+    part2(lines)

examples/sqlite_todo.zr

@@ -2,9 +2,12 @@
 extern sqlite3_open
 extern sqlite3_exec
 extern sqlite3_prepare_v2
+extern sqlite3_bind_int
 extern sqlite3_bind_text
 extern sqlite3_step
 extern sqlite3_errmsg
+extern sqlite3_column_int
+extern sqlite3_column_text
 extern sqlite3_finalize
 
 func main[] : I64
@@ -20,13 +23,49 @@ func main[] : I64
     if rc
         dbg.panic(sqlite3_errmsg(mem.read64(db)))
     
-    sqlite3_prepare_v2(mem.read64(db), "INSERT INTO todo(task) VALUES(?);", -1, stmt, 0)
+    while true
+        io.println("1. List tasks")
+        io.println("2. Add task")
+        io.println("3. Delete task")
+        io.println("0. Quit")
+        io.print("\n> ")
 
-    sqlite3_bind_text(mem.read64(stmt), 1, "World domination", -1, 0)
+        let choice: I64 = io.read_line() |> str.parse_i64()
 
-    if sqlite3_step(mem.read64(stmt)) != 101
-        dbg.panic(sqlite3_errmsg(mem.read64(db)))
-    
-    io.println("Task added!")
+        if choice == 0
+            break
+        else if choice == 1
+            io.println("============")
+            sqlite3_prepare_v2(mem.read64(db), "SELECT * FROM todo", -1, stmt, 0)
+
+            while sqlite3_step(mem.read64(stmt)) == 100
+                let id: I64 = sqlite3_column_int(mem.read64(stmt), 0)
+                let task: String = sqlite3_column_text(mem.read64(stmt), 1)
+                
+                io.print_i64(id)
+                io.print(" - ")
+                io.println(task)
+
+            io.println("============")
+        else if choice == 2
+            io.print("\nEnter new task: ")
+            let task: String = io.read_line() |> str.trim()
+
+            sqlite3_prepare_v2(mem.read64(db), "INSERT INTO todo(task) VALUES (?);", -1, stmt, 0)
+            sqlite3_bind_text(mem.read64(stmt), 1, task, -1, 0)
+            if sqlite3_step(mem.read64(stmt)) != 101
+                dbg.panic(sqlite3_errmsg(mem.read64(db)))
+
+            io.println("\nTask added\n")
+        else if choice == 3
+            io.print("\nEnter task id: ")
+            let id: I64 = io.read_line() |> str.parse_i64()
+
+            sqlite3_prepare_v2(mem.read64(db), "DELETE FROM todo WHERE id = ?;", -1, stmt, 0)
+            sqlite3_bind_int(mem.read64(stmt), 1, id, -1, 0)
+            if sqlite3_step(mem.read64(stmt)) != 101
+                dbg.panic(sqlite3_errmsg(mem.read64(db)))
+
+            io.println("\nTask deleted\n")
 
     sqlite3_finalize(mem.read64(stmt))

src/analyzer.rs

@@ -125,7 +125,7 @@ impl Analyzer {
                         );
                     }
                 } else {
-                    // TODO: cant error here since we dont analyze externs/builtins
+                    // TODO: cant error here since we dont analyze externs/builtins YET
                 }
 
                 for arg in args {

src/codegen_x86_64.rs

@@ -254,11 +254,14 @@ _builtin_environ:
 
                 self.compile_stmt(env, *body)?;
 
-                // fallback to returning null
-                emit!(&mut self.output, "    mov rax, 0");
-                emit!(&mut self.output, "    mov rsp, rbp");
-                emit!(&mut self.output, "    pop rbp");
-                emit!(&mut self.output, "    ret");
+                // fallback to null
+                // very hacky but works
+                if !self.output.trim_end().ends_with("    ret") {
+                    emit!(&mut self.output, "    mov rax, 0");
+                    emit!(&mut self.output, "    mov rsp, rbp");
+                    emit!(&mut self.output, "    pop rbp");
+                    emit!(&mut self.output, "    ret");
+                }
             }
             Stmt::Return(expr) => {
                 self.compile_expr(env, expr)?;

src/std.zr

@@ -65,7 +65,7 @@ func io.read_char[] : U8
     mem.free(s)
     return c
 
-func io.read_stdin[]: String
+func io.read_line[]: String
     let buffer: String = mem.alloc(1025)
     let n: I64 = _builtin_syscall(0, 0, buffer, 1024)
     if n < 0
@@ -74,7 +74,7 @@ func io.read_stdin[]: String
     return buffer
 
 func io.read_file[path: String]: String
-    let fd: I64 = _builtin_syscall(2, path, 0, 0) // open
+    let fd: I64 = _builtin_syscall(257, -100, path, 0, 0) // openat
     if fd <= 0
         dbg.panic("failed to open file")
 
@@ -88,7 +88,7 @@ func io.read_file[path: String]: String
     return buffer
 
 func io.write_file[path: String, content: String] : Void
-    let fd: Ptr = _builtin_syscall(2, path, 0x241, 0o644) // open
+    let fd: Ptr = _builtin_syscall(257, -100, path, 0x241, 0o644) // openat
     if fd < 0
         dbg.panic("failed to open file")
 
@@ -415,7 +415,7 @@ func os.exit[code: I64] : Void
 
 func os.urandom[]: I64
     let buffer: Ptr = mem.alloc(8)
-    let fd: I64 = _builtin_syscall(2, "/dev/urandom", 0, 0) // open
+    let fd: I64 = _builtin_syscall(257, -100, "/dev/urandom", 0, 0) // openat
     _builtin_syscall(0, fd, buffer, 8) // read
     _builtin_syscall(3, fd) // close
     let n: I64 = mem.read64(buffer)
@@ -452,7 +452,7 @@ func os.shell[command: String] : I64
             return -(st & 0x7f)
 
 func os.listdir[path: String] : Array
-    let fd: I64 = _builtin_syscall(2, path, 0, 0) // open
+    let fd: I64 = _builtin_syscall(257, -100, path, 0, 0) // openat
     if fd < 0
         return []