execute_process: Add ENCODING option for Windows child process output

Different applications can use different output encodings.

1 files changed, 49 insertions, 0 deletions

diff --git a/Tests/CMakeLib/testEncoding.cxx b/Tests/CMakeLib/testEncoding.cxx
new file mode 100644
index 0000000..88743b0
--- /dev/null
+++ b/Tests/CMakeLib/testEncoding.cxx
@@ -0,0 +1,49 @@
+#include <fstream>
+#include <iostream>
+#include <string>
+
+#include <cmsys/ConsoleBuf.hxx>
+
+#ifdef _WIN32
+void setEncoding(cmsys::ConsoleBuf::Manager& buf, UINT codepage)
+{
+  cmsys::ConsoleBuf* cb = buf.GetConsoleBuf();
+  if (cb) {
+    cb->input_pipe_codepage = codepage;
+    cb->output_pipe_codepage = codepage;
+    cb->input_file_codepage = codepage;
+    cb->output_file_codepage = codepage;
+    cb->activateCodepageChange();
+  }
+}
+#endif
+
+int main(int argc, char* argv[])
+{
+#ifdef _WIN32
+  cmsys::ConsoleBuf::Manager consoleOut(std::cout);
+#endif
+  if (argc <= 2) {
+    std::cout << "Usage: testEncoding <encoding> <file>" << std::endl;
+    return 1;
+  }
+  const std::string encoding(argv[1]);
+#ifdef _WIN32
+  if (encoding == "UTF8") {
+    setEncoding(consoleOut, CP_UTF8);
+  } else if (encoding == "ANSI") {
+    setEncoding(consoleOut, CP_ACP);
+  } else if (encoding == "OEM") {
+    setEncoding(consoleOut, CP_OEMCP);
+  } // else AUTO
+#endif
+  std::ifstream file(argv[2]);
+  if (!file.is_open()) {
+    std::cout << "Failed to open file: " << argv[2] << std::endl;
+    return 2;
+  }
+  std::string text((std::istreambuf_iterator<char>(file)),
+                   std::istreambuf_iterator<char>());
+  std::cout << text;
+  return 0;
+}