V2

README.md

@@ -12,6 +12,20 @@ Fork from https://github.com/jarredholman/ruby-zstd.
 ## Zstd version
 [v1.5.7](https://github.com/facebook/zstd/tree/v1.5.7)
 
+## Versioning Policy
+
+Starting from v2.0.0, this gem follows Semantic Versioning.
+
+- **Major version** (X.0.0): Breaking changes to the API
+- **Minor version** (X.Y.0): New features, including Zstd library version updates
+- **Patch version** (X.Y.Z): Bug fixes and other backward-compatible changes
+
+### Zstd Library Updates
+
+Updates to the underlying Zstd library version will be released as **minor version** updates, as they may introduce new features or performance improvements while maintaining backward compatibility.
+
+**Note**: Versions prior to v2.0.0 followed the Zstd library versioning scheme with an additional patch number (e.g., 1.5.6.2). This approach has been replaced with semantic versioning to provide clearer expectations for API stability.
+
 ## Installation
 
 Add this line to your application's Gemfile:
@@ -155,6 +169,20 @@ result << stream.decompress(cstr[10..-1])
 
 DDict can also be specified to `dict:`.
 
+#### Streaming Decompression with Position Tracking
+
+If you need to know how much of the input data was consumed during decompression, you can use the `decompress_with_pos` method:
+
+```ruby
+cstr = "" # Compressed data
+stream = Zstd::StreamingDecompress.new
+result, consumed_bytes = stream.decompress_with_pos(cstr[0, 10])
+# result contains the decompressed data
+# consumed_bytes contains the number of bytes from input that were processed
+```
+
+This is particularly useful when processing streaming data where you need to track the exact position in the input stream.
+
 ### Skippable frame
 
 ```ruby

benchmarks/Gemfile.lock

@@ -16,4 +16,4 @@ DEPENDENCIES
   snappy
 
 BUNDLED WITH
-   2.5.7
+   2.5.9

examples/sinatra/Gemfile.lock

@@ -1,32 +1,34 @@
 PATH
   remote: ../..
   specs:
-    zstd-ruby (1.5.6.2)
+    zstd-ruby (2.0.0.pre.preview1)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    base64 (0.2.0)
-    mustermann (3.0.0)
+    base64 (0.3.0)
+    logger (1.7.0)
+    mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
-    rack (3.0.10)
-    rack-protection (4.0.0)
+    rack (3.2.0)
+    rack-protection (4.1.1)
       base64 (>= 0.1.0)
+      logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)
-    rack-session (2.0.0)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
       rack (>= 3.0.0)
-    rackup (2.1.0)
+    rackup (2.2.1)
       rack (>= 3)
-      webrick (~> 1.8)
     ruby2_keywords (0.0.5)
-    sinatra (4.0.0)
+    sinatra (4.1.1)
+      logger (>= 1.6.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
-      rack-protection (= 4.0.0)
+      rack-protection (= 4.1.1)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    tilt (2.3.0)
-    webrick (1.8.1)
+    tilt (2.6.1)
 
 PLATFORMS
   arm64-darwin-21
@@ -38,4 +40,4 @@ DEPENDENCIES
   zstd-ruby!
 
 BUNDLED WITH
-   2.5.7
+   2.5.9

ext/zstdruby/common.h

@@ -18,7 +18,7 @@ static int convert_compression_level(VALUE compression_level_value)
   return NUM2INT(compression_level_value);
 }
 
-static void set_compress_params(ZSTD_CCtx* const ctx, VALUE level_from_args, VALUE kwargs)
+static void set_compress_params(ZSTD_CCtx* const ctx, VALUE kwargs)
 {
   ID kwargs_keys[2];
   kwargs_keys[0] = rb_intern("level");
@@ -29,9 +29,6 @@ static void set_compress_params(ZSTD_CCtx* const ctx, VALUE level_from_args, VAL
   int compression_level = ZSTD_CLEVEL_DEFAULT;
   if (kwargs_values[0] != Qundef && kwargs_values[0] != Qnil) {
     compression_level = convert_compression_level(kwargs_values[0]);
-  } else if (!NIL_P(level_from_args)) {
-    rb_warn("`level` in args is deprecated; use keyword args `level:` instead.");
-    compression_level = convert_compression_level(level_from_args);
   }
   ZSTD_CCtx_setParameter(ctx, ZSTD_c_compressionLevel, compression_level);
 

ext/zstdruby/streaming_compress.c

@@ -71,8 +71,7 @@ static VALUE
 rb_streaming_compress_initialize(int argc, VALUE *argv, VALUE obj)
 {
   VALUE kwargs;
-  VALUE compression_level_value;
-  rb_scan_args(argc, argv, "01:", &compression_level_value, &kwargs);
+  rb_scan_args(argc, argv, "00:", &kwargs);
 
   struct streaming_compress_t* sc;
   TypedData_Get_Struct(obj, struct streaming_compress_t, &streaming_compress_type, sc);
@@ -82,7 +81,7 @@ rb_streaming_compress_initialize(int argc, VALUE *argv, VALUE obj)
   if (ctx == NULL) {
     rb_raise(rb_eRuntimeError, "%s", "ZSTD_createCCtx error");
   }
-  set_compress_params(ctx, compression_level_value, kwargs);
+  set_compress_params(ctx, kwargs);
 
   sc->ctx = ctx;
   sc->buf = rb_str_new(NULL, buffOutSize);

ext/zstdruby/streaming_decompress.c

@@ -113,6 +113,27 @@ rb_streaming_decompress_decompress(VALUE obj, VALUE src)
   return result;
 }
 
+static VALUE
+rb_streaming_decompress_decompress_with_pos(VALUE obj, VALUE src)
+{
+  StringValue(src);
+  const char* input_data = RSTRING_PTR(src);
+  size_t input_size = RSTRING_LEN(src);
+  ZSTD_inBuffer input = { input_data, input_size, 0 };
+
+  struct streaming_decompress_t* sd;
+  TypedData_Get_Struct(obj, struct streaming_decompress_t, &streaming_decompress_type, sd);
+  const char* output_data = RSTRING_PTR(sd->buf);
+  VALUE result = rb_str_new(0, 0);
+  ZSTD_outBuffer output = { (void*)output_data, sd->buf_size, 0 };
+  size_t const ret = zstd_stream_decompress(sd->dctx, &output, &input, false);
+  if (ZSTD_isError(ret)) {
+    rb_raise(rb_eRuntimeError, "decompress error error code: %s", ZSTD_getErrorName(ret));
+  }
+  rb_str_cat(result, output.dst, output.pos);
+  return rb_ary_new_from_args(2, result, ULONG2NUM(input.pos));
+}
+
 extern VALUE rb_mZstd, cStreamingDecompress;
 void
 zstd_ruby_streaming_decompress_init(void)
@@ -121,4 +142,5 @@ zstd_ruby_streaming_decompress_init(void)
   rb_define_alloc_func(cStreamingDecompress, rb_streaming_decompress_allocate);
   rb_define_method(cStreamingDecompress, "initialize", rb_streaming_decompress_initialize, -1);
   rb_define_method(cStreamingDecompress, "decompress", rb_streaming_decompress_decompress, 1);
+  rb_define_method(cStreamingDecompress, "decompress_with_pos", rb_streaming_decompress_decompress_with_pos, 1);
 }

ext/zstdruby/zstdruby.c

@@ -11,16 +11,15 @@ static VALUE zstdVersion(VALUE self)
 static VALUE rb_compress(int argc, VALUE *argv, VALUE self)
 {
   VALUE input_value;
-  VALUE compression_level_value;
   VALUE kwargs;
-  rb_scan_args(argc, argv, "11:", &input_value, &compression_level_value, &kwargs);
+  rb_scan_args(argc, argv, "10:", &input_value, &kwargs);
 
   ZSTD_CCtx* const ctx = ZSTD_createCCtx();
   if (ctx == NULL) {
     rb_raise(rb_eRuntimeError, "%s", "ZSTD_createCCtx error");
   }
 
-  set_compress_params(ctx, compression_level_value, kwargs);
+  set_compress_params(ctx, kwargs);
 
   StringValue(input_value);
   char* input_data = RSTRING_PTR(input_value);
@@ -40,51 +39,6 @@ static VALUE rb_compress(int argc, VALUE *argv, VALUE self)
   return output;
 }
 
-static VALUE rb_compress_using_dict(int argc, VALUE *argv, VALUE self)
-{
-  rb_warn("Zstd.compress_using_dict is deprecated; use Zstd.compress with `dict:` instead.");
-  VALUE input_value;
-  VALUE dict;
-  VALUE compression_level_value;
-  rb_scan_args(argc, argv, "21", &input_value, &dict, &compression_level_value);
-  int compression_level = convert_compression_level(compression_level_value);
-
-  StringValue(input_value);
-  char* input_data = RSTRING_PTR(input_value);
-  size_t input_size = RSTRING_LEN(input_value);
-  size_t max_compressed_size = ZSTD_compressBound(input_size);
-
-  char* dict_buffer = RSTRING_PTR(dict);
-  size_t dict_size = RSTRING_LEN(dict);
-
-  ZSTD_CDict* const cdict = ZSTD_createCDict(dict_buffer, dict_size, compression_level);
-  if (cdict == NULL) {
-    rb_raise(rb_eRuntimeError, "%s", "ZSTD_createCDict failed");
-  }
-  ZSTD_CCtx* const ctx = ZSTD_createCCtx();
-  if (ctx == NULL) {
-    ZSTD_freeCDict(cdict);
-    rb_raise(rb_eRuntimeError, "%s", "ZSTD_createCCtx failed");
-  }
-
-  VALUE output = rb_str_new(NULL, max_compressed_size);
-  char* output_data = RSTRING_PTR(output);
-  size_t const compressed_size = ZSTD_compress_usingCDict(ctx, (void*)output_data, max_compressed_size,
-                                             (void*)input_data, input_size, cdict);
-
-  if (ZSTD_isError(compressed_size)) {
-    ZSTD_freeCDict(cdict);
-    ZSTD_freeCCtx(ctx);
-    rb_raise(rb_eRuntimeError, "%s: %s", "compress failed", ZSTD_getErrorName(compressed_size));
-  }
-
-  rb_str_resize(output, compressed_size);
-  ZSTD_freeCDict(cdict);
-  ZSTD_freeCCtx(ctx);
-  return output;
-}
-
-
 static VALUE decompress_buffered(ZSTD_DCtx* dctx, const char* input_data, size_t input_size)
 {
   ZSTD_inBuffer input = { input_data, input_size, 0 };
@@ -142,59 +96,6 @@ static VALUE rb_decompress(int argc, VALUE *argv, VALUE self)
   return output;
 }
 
-static VALUE rb_decompress_using_dict(int argc, VALUE *argv, VALUE self)
-{
-  rb_warn("Zstd.decompress_using_dict is deprecated; use Zstd.decompress with `dict:` instead.");
-  VALUE input_value;
-  VALUE dict;
-  rb_scan_args(argc, argv, "20", &input_value, &dict);
-
-  StringValue(input_value);
-  char* input_data = RSTRING_PTR(input_value);
-  size_t input_size = RSTRING_LEN(input_value);
-
-  char* dict_buffer = RSTRING_PTR(dict);
-  size_t dict_size = RSTRING_LEN(dict);
-  ZSTD_DDict* const ddict = ZSTD_createDDict(dict_buffer, dict_size);
-  if (ddict == NULL) {
-    rb_raise(rb_eRuntimeError, "%s", "ZSTD_createDDict failed");
-  }
-  unsigned const expected_dict_id = ZSTD_getDictID_fromDDict(ddict);
-  unsigned const actual_dict_id = ZSTD_getDictID_fromFrame(input_data, input_size);
-  if (expected_dict_id != actual_dict_id) {
-    ZSTD_freeDDict(ddict);
-    rb_raise(rb_eRuntimeError, "DictID mismatch");
-  }
-
-  ZSTD_DCtx* const ctx = ZSTD_createDCtx();
-  if (ctx == NULL) {
-    ZSTD_freeDDict(ddict);
-    rb_raise(rb_eRuntimeError, "%s", "ZSTD_createDCtx failed");
-  }
-
-  unsigned long long const uncompressed_size = ZSTD_getFrameContentSize(input_data, input_size);
-  if (uncompressed_size == ZSTD_CONTENTSIZE_ERROR) {
-    ZSTD_freeDDict(ddict);
-    ZSTD_freeDCtx(ctx);
-    rb_raise(rb_eRuntimeError, "%s: %s", "not compressed by zstd", ZSTD_getErrorName(uncompressed_size));
-  }
-  if (uncompressed_size == ZSTD_CONTENTSIZE_UNKNOWN) {
-    return decompress_buffered(ctx, input_data, input_size);
-  }
-
-  VALUE output = rb_str_new(NULL, uncompressed_size);
-  char* output_data = RSTRING_PTR(output);
-  size_t const decompress_size = ZSTD_decompress_usingDDict(ctx, output_data, uncompressed_size, input_data, input_size, ddict);
-  if (ZSTD_isError(decompress_size)) {
-    ZSTD_freeDDict(ddict);
-    ZSTD_freeDCtx(ctx);
-    rb_raise(rb_eRuntimeError, "%s: %s", "decompress error", ZSTD_getErrorName(decompress_size));
-  }
-  ZSTD_freeDDict(ddict);
-  ZSTD_freeDCtx(ctx);
-  return output;
-}
-
 static void free_cdict(void *dict)
 {
   ZSTD_freeCDict(dict);
@@ -284,9 +185,7 @@ zstd_ruby_init(void)
 {
   rb_define_module_function(rb_mZstd, "zstd_version", zstdVersion, 0);
   rb_define_module_function(rb_mZstd, "compress", rb_compress, -1);
-  rb_define_module_function(rb_mZstd, "compress_using_dict", rb_compress_using_dict, -1);
   rb_define_module_function(rb_mZstd, "decompress", rb_decompress, -1);
-  rb_define_module_function(rb_mZstd, "decompress_using_dict", rb_decompress_using_dict, -1);
 
   rb_define_alloc_func(rb_cCDict, rb_cdict_alloc);
   rb_define_private_method(rb_cCDict, "initialize", rb_cdict_initialize, -1);

lib/zstd-ruby/version.rb

@@ -1,3 +1,3 @@
 module Zstd
-  VERSION = "1.5.7.0"
+  VERSION = "2.0.0-preview1"
 end

spec/zstd-ruby-streaming-decompress_spec.rb

@@ -17,6 +17,71 @@
     end
   end
 
+  describe 'decompress_with_pos' do
+    it 'should return decompressed data and consumed input position' do
+      str = "hello world test data"
+      cstr = Zstd.compress(str)
+      stream = Zstd::StreamingDecompress.new
+
+      # Test with partial input
+      result_array = stream.decompress_with_pos(cstr[0, 10])
+      expect(result_array).to be_an(Array)
+      expect(result_array.length).to eq(2)
+
+      decompressed_data = result_array[0]
+      consumed_bytes = result_array[1]
+
+      expect(decompressed_data).to be_a(String)
+      expect(consumed_bytes).to be_a(Integer)
+      expect(consumed_bytes).to be > 0
+      expect(consumed_bytes).to be <= 10
+    end
+
+    it 'should work with complete compressed data' do
+      str = "foo bar buzz"
+      cstr = Zstd.compress(str)
+      stream = Zstd::StreamingDecompress.new
+
+      result_array = stream.decompress_with_pos(cstr)
+      decompressed_data = result_array[0]
+      consumed_bytes = result_array[1]
+
+      expect(decompressed_data).to eq(str)
+      expect(consumed_bytes).to eq(cstr.length)
+    end
+
+    it 'should work with multiple calls' do
+      str = "test data for multiple calls"
+      cstr = Zstd.compress(str)
+      stream = Zstd::StreamingDecompress.new
+
+      result = ''
+      total_consumed = 0
+      chunk_size = 5
+
+      while total_consumed < cstr.length
+        remaining_data = cstr[total_consumed..-1]
+        chunk = remaining_data[0, chunk_size]
+
+        result_array = stream.decompress_with_pos(chunk)
+        decompressed_chunk = result_array[0]
+        consumed_bytes = result_array[1]
+
+        result << decompressed_chunk
+        total_consumed += consumed_bytes
+
+        expect(consumed_bytes).to be > 0
+        expect(consumed_bytes).to be <= chunk.length
+
+        # If we consumed less than the chunk size, we might be done or need more data
+        break if consumed_bytes < chunk.length && total_consumed == cstr.length
+      end
+
+      expect(result).to eq(str)
+      expect(total_consumed).to eq(cstr.length)
+    end
+  end
+
   describe 'streaming decompress + GC.compact' do
     it 'shoud work' do
       # str = SecureRandom.hex(150)
@@ -109,4 +174,3 @@
     end
   end
 end
-