add mstch

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/mstch/src/utils.cpp b/lib/mstch/src/utils.cpp
new file mode 100644
index 0000000..1646170
--- /dev/null
+++ b/lib/mstch/src/utils.cpp
@@ -0,0 +1,44 @@
+#include "utils.hpp"
+#include "mstch/mstch.hpp"
+
+mstch::citer mstch::first_not_ws(mstch::citer begin, mstch::citer end) {
+  for (auto it = begin; it != end; ++it)
+    if (*it != ' ') return it;
+  return end;
+}
+
+mstch::citer mstch::first_not_ws(mstch::criter begin, mstch::criter end) {
+  for (auto rit = begin; rit != end; ++rit)
+    if (*rit != ' ') return --(rit.base());
+  return --(end.base());
+}
+
+mstch::criter mstch::reverse(mstch::citer it) {
+  return std::reverse_iterator<mstch::citer>(it);
+}
+
+std::string mstch::html_escape(const std::string& str) {
+  if (mstch::config::escape)
+    return mstch::config::escape(str);
+  
+  std::string out;
+  citer start = str.begin();
+
+  auto add_escape = [&out, &start](const std::string& escaped, citer& it) {
+    out += std::string{start, it} + escaped;
+    start = it + 1;
+  };
+
+  for (auto it = str.begin(); it != str.end(); ++it)
+    switch (*it) {
+      case '&': add_escape("&amp;", it); break;
+      case '\'': add_escape("&#39;", it); break;
+      case '"': add_escape("&quot;", it); break;
+      case '<': add_escape("&lt;", it); break;
+      case '>': add_escape("&gt;", it); break;
+      case '/': add_escape("&#x2F;", it); break;
+      default: break;
+    }
+
+  return out + std::string{start, str.end()};
+}