Add C++ aggregator for sort

CODE_OF_CONDUCT.md

@@ -0,0 +1,3 @@
+# Code of Conduct
+
+* [PaSh Code of Conduct](https://github.com/binpash/admin/blob/main/CODE_OF_CONDUCT.md)

runtime/agg/README.md

@@ -16,7 +16,7 @@ Let's assume that the aggregator being implemented is for a command called `cmd`
 
 2. For each `OS` supported by PaSh:
 
-    2.1 Create a file named `OS-agg.h` inside that folder
+    2.1 Create a file named `agg-OS.h` inside that folder
 
     2.2. Implement the aggregator inside that file using the instructions provided in `cpp/common/main.h` or use a different aggregator as an example. Remember about the include guard.
 

runtime/agg/cpp/aggregators/sort/agg-bsd.h

@@ -0,0 +1,62 @@
+#ifndef AGG_SORT_H
+#define AGG_SORT_H
+
+#include "main.h"
+#include <string>
+#include <algorithm>
+#include <cstdlib>
+#include <cstring>
+
+inline constexpr cmd_opts g_options{
+    // TODO
+};
+
+bool compare(const std::string& str1, const std::string& str2)
+{
+    return str1 < str2;
+}
+
+void aggregate() noexcept
+{
+    std::string input1_top, input2_top;
+    bool invalid1 = true, invalid2 = true;
+    while (true)
+    {
+        if (invalid1)
+        {
+            std::getline(input1(), input1_top);
+            if (!input1())
+                break;
+            invalid1 = false;
+        }
+        if (invalid2)
+        {
+            std::getline(input2(), input2_top);
+            if (!input2())
+                break;
+            invalid2 = false;
+        }
+
+        if (compare(input1_top, input2_top)) // input1_top < input2_top
+        {
+            output() << input1_top << '\n';
+            invalid1 = true;
+        }
+        else
+        {
+            output() << input2_top << '\n';
+            invalid2 = true;
+        }
+    }
+
+    if(!invalid1)
+        output() << input1_top << '\n';
+    if(!invalid2)
+        output() << input2_top << '\n';
+
+    // At this point at least one of the inputs
+    // is empty, so the other one can sefely be forwarded
+    output() << input1().rdbuf() << input2().rdbuf();
+}
+
+#endif // AGG_SORT_H

runtime/agg/cpp/aggregators/sort/agg-linux.h

@@ -0,0 +1 @@
+#include "agg-bsd.h"

runtime/agg/cpp/tests/test-bsd.sh

@@ -42,6 +42,8 @@
 ./test-common.sh uniq "-c" ../bin/uniq 
 ./test-common.sh uniq "--count" ../bin/uniq
 
+./test-common.sh sort "" ../bin/sort
+
 # These tests are run during PASH_TOP/scripts/run_tests.sh
 # Make sure to build the aggregators using PASH_TOP/scripts/setup-pash.sh first
 #

runtime/agg/cpp/tests/test-linux.sh

@@ -46,6 +46,8 @@
 ./test-common.sh uniq "-c" ../bin/uniq 
 ./test-common.sh uniq "--count" ../bin/uniq
 
+./test-common.sh sort "" ../bin/sort
+
 # These tests are run during PASH_TOP/scripts/run_tests.sh
 # Make sure to build the aggregators using PASH_TOP/scripts/setup-pash.sh first
 #