refactor: extract magic numbers to constants.mbt

- Create src/constants.mbt with default_max_output_size (100MB) and default_max_input_size (1GB)
- Replace all hardcoded 104857600 and 1073741824 with named constants
- Update types.mbt to use constants in default() methods
- Update all test files to use constants instead of magic numbers
- Improves code maintainability and makes limits easier to adjust
- All 125 tests pass

Author: hustcer

src/constants.mbt

@@ -0,0 +1,7 @@
+///|
+/// Default maximum output size for decompression (100MB)
+pub let default_max_output_size : Int = 104857600
+
+///|
+/// Default maximum input size for decompression (1GB)
+pub let default_max_input_size : Int = 1073741824

src/deflate_wbtest.mbt

@@ -443,8 +443,8 @@ test "deflate with dictionary" {
   let decompressed = inflate_sync(compressed, opts={
     out: None,
     dictionary: Some(dict),
-    max_output_size: 104857600,
-    max_input_size: 1073741824,
+    max_output_size: default_max_output_size,
+    max_input_size: default_max_input_size,
   })
   assert_eq(decompressed.length(), 5)
   for i in 0..<5 {

src/inflate_wbtest.mbt

@@ -137,8 +137,8 @@ test "inflt/offset/basic" {
     InflateState::new(2),
     None,
     None,
-    1073741824,
-    1073741824,
+    default_max_input_size,
+    default_max_input_size,
     dat_off=prefix,
     dat_end=prefix + cl,
   )
@@ -166,8 +166,8 @@ test "inflt/offset/with_output_buf" {
     InflateState::new(2),
     Some(out),
     None,
-    1073741824,
-    1073741824,
+    default_max_input_size,
+    default_max_input_size,
     dat_off=prefix,
     dat_end=prefix + cl,
   )
@@ -238,8 +238,8 @@ test "inflt/tuple_return/no_buf" {
     InflateState::new(2),
     None,
     None,
-    1073741824,
-    1073741824,
+    default_max_input_size,
+    default_max_input_size,
   )
   assert_eq(len, 300)
   // buf may be larger than len (over-allocated)
@@ -263,8 +263,8 @@ test "inflt/tuple_return/exact_buf" {
     InflateState::new(2),
     Some(out),
     None,
-    1073741824,
-    1073741824,
+    default_max_input_size,
+    default_max_input_size,
   )
   assert_eq(len, 256)
   assert_eq(buf.length(), 256)
@@ -287,8 +287,8 @@ test "inflt/tuple_return/oversized_buf" {
     InflateState::new(2),
     Some(out),
     None,
-    1073741824,
-    1073741824,
+    default_max_input_size,
+    default_max_input_size,
   )
   assert_eq(len, 100)
   assert_eq(buf.length(), 500)
@@ -326,7 +326,7 @@ test "inflate - custom max_output_size limit" {
     out: None,
     dictionary: None,
     max_output_size: 500,
-    max_input_size: 1073741824,
+    max_input_size: default_max_input_size,
   })
   assert_true(result is Err(_))
 }
@@ -344,7 +344,7 @@ test "inflate - custom max_input_size limit" {
   let result = try? inflate_sync(compressed, opts={
     out: None,
     dictionary: None,
-    max_output_size: 104857600,
+    max_output_size: default_max_output_size,
     max_input_size: 100,
   })
   assert_true(result is Err(_))

src/types.mbt

@@ -23,9 +23,9 @@ pub fn InflateOptions::default() -> InflateOptions {
   {
     out: None,
     dictionary: None,
-    max_output_size: 104857600,
-    max_input_size: 1073741824,
-  } // 100MB output, 1GB input
+    max_output_size: default_max_output_size,
+    max_input_size: default_max_input_size,
+  }
 }
 
 ///|
@@ -55,8 +55,8 @@ pub fn GunzipOptions::default() -> GunzipOptions {
   {
     out: None,
     dictionary: None,
-    max_output_size: 104857600,
-    max_input_size: 1073741824,
+    max_output_size: default_max_output_size,
+    max_input_size: default_max_input_size,
   }
 }
 
@@ -85,8 +85,8 @@ pub fn UnzlibOptions::default() -> UnzlibOptions {
   {
     out: None,
     dictionary: None,
-    max_output_size: 104857600,
-    max_input_size: 1073741824,
+    max_output_size: default_max_output_size,
+    max_input_size: default_max_input_size,
   }
 }
 

src/zip.mbt

@@ -376,8 +376,8 @@ pub fn unzip_sync(
         InflateState::new(2),
         Some(out),
         None,
-        1073741824,
-        1073741824,
+        default_max_input_size,
+        default_max_input_size,
         dat_off=b_off,
         dat_end=b_off + sc,
       )