Internal changes

diff --git a/snappy-c.cc b/snappy-c.cc
index 6da18d8..fc2d5d3 100644
--- a/snappy-c.cc
+++ b/snappy-c.cc

@@ -45,6 +45,25 @@
   return SNAPPY_OK;
 }
 
+snappy_status snappy_compress_with_level(const char* input, size_t input_length,
+                                         int compression_level,
+                                         char* compressed,
+                                         size_t* compressed_length) {
+  if (*compressed_length < snappy_max_compressed_length(input_length)) {
+    return SNAPPY_BUFFER_TOO_SMALL;
+  }
+  if (compression_level < SNAPPY_MIN_COMPRESSION_LEVEL ||
+      compression_level > SNAPPY_MAX_COMPRESSION_LEVEL) {
+    return SNAPPY_INVALID_INPUT;
+  }
+  snappy::RawCompress(input, input_length, compressed, compressed_length,
+                      snappy::CompressionOptions{/*level=*/compression_level});
+  if (*compressed_length == 0) {
+    return SNAPPY_INVALID_INPUT;
+  }
+  return SNAPPY_OK;
+}
+
 snappy_status snappy_uncompress(const char* compressed,
                                 size_t compressed_length,
                                 char* uncompressed,

diff --git a/snappy-c.h b/snappy-c.h
index e228785..4dfdcdb 100644
--- a/snappy-c.h
+++ b/snappy-c.h

@@ -57,7 +57,8 @@
  * If it is not at least equal to "snappy_max_compressed_length(input_length)",
  * SNAPPY_BUFFER_TOO_SMALL is returned. After successful compression,
  * <compressed_length> contains the true length of the compressed output,
- * and SNAPPY_OK is returned.
+ * and SNAPPY_OK is returned. Compression level is 1. For using other
+ * compression levels, call snappy_compress_with_level.
  *
  * An <input_length> of 2^32 or more returns SNAPPY_INVALID_INPUT with
  * <compressed_length> set to 0 and nothing written.
@@ -71,10 +72,20 @@
  *   }
  *   free(output);
  */
-snappy_status snappy_compress(const char* input,
-                              size_t input_length,
-                              char* compressed,
-                              size_t* compressed_length);
+snappy_status snappy_compress(const char* input, size_t input_length,
+                              char* compressed, size_t* compressed_length);
+
+/*
+ * Same as above but uses compression_level which must be between
+ * SNAPPY_MIN_COMPRESSION_LEVEL and SNAPPY_MAX_COMPRESSION_LEVEL.
+ */
+#define SNAPPY_MIN_COMPRESSION_LEVEL 1
+#define SNAPPY_MAX_COMPRESSION_LEVEL 2
+
+snappy_status snappy_compress_with_level(const char* input, size_t input_length,
+                                         int compression_level,
+                                         char* compressed,
+                                         size_t* compressed_length);
 
 /*
  * Given data in "compressed[0..compressed_length-1]" generated by

diff --git a/snappy_unittest.cc b/snappy_unittest.cc
index db60f1d..57d617b 100644
--- a/snappy_unittest.cc
+++ b/snappy_unittest.cc

@@ -545,7 +545,7 @@
 }
 
 TEST(Snappy, CompressionContext) {
-  std::minstd_rand0 rng(absl::GetFlag(FLAGS_test_random_seed));
+  std::minstd_rand0 rng(snappy::GetFlag(FLAGS_test_random_seed));
   std::uniform_int_distribution<int> uniform_byte(0, 255);
 
   // A single context, reused across every compression below.