1 files changed, 126 insertions, 0 deletions
diff --git a/tests/src/compare-files.cpp b/tests/src/compare-files.cpp
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+++ b/tests/src/compare-files.cpp
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+/**
+ *
+ * Copyright 2021-2023 Ribose Inc. (https://www.ribose.com)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include <algorithm>
+#include <fstream>
+
+#include "sexp-tests.h"
+
+bool compare_binary_files(const std::string &filename1, const std::string &filename2)
+{
+    bool          res = false;
+    std::ifstream file1(filename1, std::ifstream::ate | std::ifstream::binary);
+    std::ifstream file2(filename2, std::ifstream::ate | std::ifstream::binary);
+
+    if (file1.tellg() == file2.tellg()) { // otherwise different file size
+        file1.seekg(0);
+        file2.seekg(0);
+
+        std::istreambuf_iterator<char> begin1(file1);
+        std::istreambuf_iterator<char> begin2(file2);
+
+        res = std::equal(begin1, std::istreambuf_iterator<char>(), begin2);
+    }
+
+    return res;
+}
+
+bool compare_binary_files(const std::string &filename1, std::istream &file2)
+{
+    std::ifstream file1(filename1, std::ifstream::binary);
+
+    std::istreambuf_iterator<char> begin1(file1);
+    std::istreambuf_iterator<char> begin2(file2);
+    return std::equal(begin1, std::istreambuf_iterator<char>(), begin2);
+}
+
+std::istream &safe_get_line(std::istream &is, std::string &t)
+{
+    t.clear();
+
+    // The characters in the stream are read one-by-one using a std::streambuf.
+    // That is faster than reading them one-by-one using the std::istream.
+    // Code that uses streambuf this way must be guarded by a sentry object.
+    // The sentry object performs various tasks,
+    // such as thread synchronization and updating the stream state.
+
+    std::istream::sentry se(is, true);
+    std::streambuf *     sb = is.rdbuf();
+
+    for (;;) {
+        int c = sb->sbumpc();
+        switch (c) {
+        case '\n':
+            return is;
+        case '\r':
+            if (sb->sgetc() == '\n')
+                sb->sbumpc();
+            return is;
+        case std::streambuf::traits_type::eof():
+            // Also handle the case when the last line has no line ending
+            if (t.empty())
+                is.setstate(std::ios::eofbit);
+            return is;
+        default:
+            t += (char) c;
+        }
+    }
+}
+
+bool compare_text_files(const std::string &filename1, const std::string &filename2)
+{
+    bool          res = true;
+    std::ifstream file1(filename1, std::ifstream::binary);
+    std::ifstream file2(filename2, std::ifstream::binary);
+    std::string   s1, s2;
+
+    while (res) {
+        if (file1.eof() && file2.eof())
+            break;
+        safe_get_line(file1, s1);
+        safe_get_line(file2, s2);
+        if (s1 != s2)
+            res = false;
+    }
+
+    return res;
+}
+
+bool compare_text_files(const std::string &filename1, std::istream &file2)
+{
+    bool          res = true;
+    std::ifstream file1(filename1, std::ifstream::binary);
+    std::string   s1, s2;
+    file2.seekg(0);
+
+    while (res) {
+        if (file1.eof() && file2.eof())
+            break;
+        safe_get_line(file1, s1);
+        safe_get_line(file2, s2);
+        if (s1 != s2)
+            res = false;
+    }
+
+    return res;
+}