src: move JSONWriter into its own file

The JSONWriter feature is not inherently related to the report
feature in any way.

As a drive-by fix, remove a number of unused header includes.

PR-URL: https://github.com/nodejs/node/pull/32552
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/src/json_utils.cc b/src/json_utils.cc
new file mode 100644
index 00000000000..aa03a6d7305
--- /dev/null
+++ b/src/json_utils.cc
@@ -0,0 +1,67 @@
+#include "json_utils.h"
+
+namespace node {
+
+std::string EscapeJsonChars(const std::string& str) {
+  const std::string control_symbols[0x20] = {
+      "\\u0000", "\\u0001", "\\u0002", "\\u0003", "\\u0004", "\\u0005",
+      "\\u0006", "\\u0007", "\\b", "\\t", "\\n", "\\v", "\\f", "\\r",
+      "\\u000e", "\\u000f", "\\u0010", "\\u0011", "\\u0012", "\\u0013",
+      "\\u0014", "\\u0015", "\\u0016", "\\u0017", "\\u0018", "\\u0019",
+      "\\u001a", "\\u001b", "\\u001c", "\\u001d", "\\u001e", "\\u001f"
+  };
+
+  std::string ret;
+  size_t last_pos = 0;
+  size_t pos = 0;
+  for (; pos < str.size(); ++pos) {
+    std::string replace;
+    char ch = str[pos];
+    if (ch == '\\') {
+      replace = "\\\\";
+    } else if (ch == '\"') {
+      replace = "\\\"";
+    } else {
+      size_t num = static_cast<size_t>(ch);
+      if (num < 0x20) replace = control_symbols[num];
+    }
+    if (!replace.empty()) {
+      if (pos > last_pos) {
+        ret += str.substr(last_pos, pos - last_pos);
+      }
+      last_pos = pos + 1;
+      ret += replace;
+    }
+  }
+  // Append any remaining symbols.
+  if (last_pos < str.size()) {
+    ret += str.substr(last_pos, pos - last_pos);
+  }
+  return ret;
+}
+
+std::string Reindent(const std::string& str, int indent_depth) {
+  std::string indent;
+  for (int i = 0; i < indent_depth; i++) indent += ' ';
+
+  std::string out;
+  std::string::size_type pos = 0;
+  do {
+    std::string::size_type prev_pos = pos;
+    pos = str.find('\n', pos);
+
+    out.append(indent);
+
+    if (pos == std::string::npos) {
+      out.append(str, prev_pos, std::string::npos);
+      break;
+    } else {
+      pos++;
+      out.append(str, prev_pos, pos - prev_pos);
+    }
+  } while (true);
+
+  return out;
+}
+
+}  // namespace node