Import of the watch repository from Pebble

tests/fw/util/test_sle.c

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+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "clar.h"
+
+#include "util/sle.h"
+
+#include "stubs/stubs_passert.h"
+
+void test_sle__simple(void) {
+  SLEDecodeContext ctx;
+  uint8_t buf[] = {
+    0xfd, // escape code
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+    0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+    0xfd, 0x00 // end
+  };
+  sle_decode_init(&ctx, buf);
+
+  uint8_t byte;
+  uint8_t expect = 0x00;
+  uint32_t count = 0;
+  while (sle_decode(&ctx, &byte)) {
+    cl_assert_equal_i(byte, expect++);
+    ++count;
+  }
+  cl_assert_equal_i(count, 16);
+}
+
+void test_sle__short_zeros(void) {
+  SLEDecodeContext ctx;
+  uint8_t buf[] = {
+    0xfd, // escape code
+    0xfd, 0x5, // 5 zeroes
+    0xfd, 0x00 // end
+  };
+  sle_decode_init(&ctx, buf);
+
+  uint8_t byte;
+  uint32_t count = 0;
+  while (sle_decode(&ctx, &byte)) {
+    cl_assert_equal_i(byte, 0x0);
+    ++count;
+  }
+  cl_assert_equal_i(count, 5);
+}
+
+void test_sle__long_zeros(void) {
+  SLEDecodeContext ctx;
+  uint8_t buf[] = {
+    0xfd, // escape code
+    0xfd, 0xff, 0xaa, // 32810 zeroes
+    0xfd, 0x00 // end
+  };
+  sle_decode_init(&ctx, buf);
+
+  uint8_t byte;
+  uint32_t count = 0;
+  while (sle_decode(&ctx, &byte)) {
+    cl_assert_equal_i(byte, 0x0);
+    ++count;
+  }
+  cl_assert_equal_i(count, 32810);
+}
+
+void test_sle__escape_byte(void) {
+  SLEDecodeContext ctx;
+  uint8_t buf[] = {
+    0xfd, // escape code
+    0xfd, 0x01, // literal escape byte
+    0xfd, 0x00 // end
+  };
+  sle_decode_init(&ctx, buf);
+
+  uint8_t byte;
+  uint32_t count = 0;
+  while (sle_decode(&ctx, &byte)) {
+    cl_assert_equal_i(byte, 0xfd);
+    ++count;
+  }
+  cl_assert_equal_i(count, 1);
+}