rewrite array builtins in zern

src/codegen_x86_64.rs

@@ -150,6 +150,16 @@ _builtin_deref64:
     mov rax, qword [rdi]
     ret
 
+section .text._builtin_set8
+_builtin_set8:
+    mov [rdi], sil
+    ret
+
+section .text._builtin_set64
+_builtin_set64:
+    mov [rdi], rsi
+    ret
+
 section .text._builtin_stdin
 _builtin_stdin:
     mov rax, [rel stdin]
@@ -169,11 +179,6 @@ _builtin_rshift:
     sar rax, cl
     ret
 
-section .text._builtin_string_set
-_builtin_string_set:
-    mov [rdi + rsi], dl
-    ret
-
 section .text._builtin_listdir
 _builtin_listdir:
     push r14
@@ -215,56 +220,6 @@ _builtin_listdir:
     pop rbx
     pop r14
     ret
-
-section .text._builtin_array_set
-_builtin_array_set:
-    mov rax, [rdi]
-    mov [rax + rsi*8], rdx
-    ret
-
-section .text._builtin_array_push
-_builtin_array_push:
-    push r14
-    push rbx
-    push rax
-    mov r14, rsi
-    mov rbx, rdi
-    mov rax, [rdi]
-    mov rcx, [rdi + 16]
-    cmp rcx, [rdi + 8]
-    jne ._builtin_array_push.1
-    lea rdx, [rcx + rcx]
-    mov rsi, 4
-    test rcx, rcx
-    cmovnz rsi, rdx
-    mov [rbx + 8], rsi
-    shl rsi, 3
-    mov rdi, rax
-    call realloc
-    mov [rbx], rax
-    mov rcx, [rbx + 16]
-._builtin_array_push.1:
-    mov [rax + rcx*8], r14
-    inc qword [rbx + 16]
-    add rsp, 8
-    pop rbx
-    pop r14
-    ret
-
-section .text._builtin_array_size
-_builtin_array_size:
-    mov rax, [rdi + 16]
-    ret
-
-section .text._builtin_array_free
-_builtin_array_free:
-    push rbx
-    mov rbx, rdi
-    mov rdi, [rdi]
-    call free
-    mov rdi, rbx
-    pop rbx
-    jmp free
 "
         );
         Ok(())

src/parser.rs

@@ -72,7 +72,7 @@ pub enum Expr {
 }
 
 // TODO: currently they are all just 8 byte values
-static TYPES: [&str; 6] = ["U8", "I64", "String", "Bool", "Ptr", "Array"];
+static TYPES: [&str; 7] = ["Void", "U8", "I64", "String", "Bool", "Ptr", "Array"];
 
 pub struct Parser {
     tokens: Vec<Token>,

src/std.zr

@@ -1,18 +1,18 @@
-func panic[msg: String] : I64
+func panic[msg: String] : Void
     printf("PANIC: %s\n", msg)
     exit(1)
 
-func print[x: String] : I64
+func print[x: String] : Void
     printf("%s\n", x)
 
-func print_i64[x: I64] : I64
+func print_i64[x: I64] : Void
     printf("%ld\n", x)
 
 func String.nth[s: String, n: I64] : U8
     return _builtin_deref8(s + n)
 
-func String.set[s: String, n: I64, c: U8] : I64
-    _builtin_string_set(s, n, c)
+func String.set[s: String, n: I64, c: U8] : Void
+    _builtin_set8(s+n, c)
 
 func String.is_whitespace[c: U8] : Bool
     return c == ' ' || c == 10 || c == 13 || c == 9
@@ -84,7 +84,7 @@ func IO.read_file[path: String]: String
     fclose(file)
     return buffer
 
-func IO.write_file[path: String, content: String] : I64
+func IO.write_file[path: String, content: String] : Void
     let file: Ptr = fopen(path, "wb")
     if !file
         panic("failed to open file")
@@ -176,14 +176,33 @@ func Math.urandom[]: I64
 func Array.new[] : Array
     return calloc(1, 24)
 
-func Array.set[xs: Array, n: I64, x: I64] : I64
-    _builtin_array_set(xs, n, x)
+func Array.set[xs: Array, n: I64, x: I64] : Void
+    let data: Ptr = _builtin_deref64(xs)
+    _builtin_set64(data+n*8, x)
 
-func Array.push[xs: Array, x: I64] : I64
-    return _builtin_array_push(xs, x)
+func Array.push[xs: Array, x: I64] : Void
+    let data: Ptr = _builtin_deref64(xs)
+    let capacity: I64 = _builtin_deref64(xs+8)
+    let size: I64 = _builtin_deref64(xs+16)
+
+    if size == capacity
+        let new_capacity: I64 = 4
+        if capacity != 0
+            new_capacity = capacity * 2
+        let new_data: Ptr = realloc(data, new_capacity * 8)
+        _builtin_set64(xs, new_data)
+        _builtin_set64(xs+8, new_capacity)
+        data = new_data
+
+    _builtin_set64(data+size*8, x)
+    _builtin_set64(xs+16, size + 1)
 
 func Array.size[xs: Array] : I64
-    return _builtin_array_size(xs)
+    return _builtin_deref64(xs+16)
+
+func Array.free[xs: Array] : Void
+    free(_builtin_deref64(xs))
+    free(xs)
 
 func OS.time[] : I64
     let tv: Ptr = malloc(16)