...

common/adc_utils.h

@@ -27,6 +27,49 @@ static auto AdcTrimSpaces(R&& r)
 }
 
 
+enum class AdcTrimType { TRIM_LEFT, TRIM_RIGHT, TRIM_BOTH };
+
+template <traits::adc_char_view VR, traits::adc_char_range R>
+    requires std::ranges::contiguous_range<R>
+static auto AdcTrimSpacesView(R&& r, AdcTrimType type = AdcTrimType::TRIM_BOTH)
+{
+    auto is_space = [](const auto& ch) { return ch == ' '; };
+
+    auto end = std::forward<R>(r).end();
+
+    auto f1 = std::forward<R>(r).begin();
+
+    if (type != AdcTrimType::TRIM_RIGHT) {
+        // look for the first non-space symbol
+        f1 = std::ranges::find_if_not(std::forward<R>(r), is_space);
+        if (f1 == end) {  // all are spaces!
+            return VR();
+        }
+    }
+
+    auto f2 = end;
+
+    if (type != AdcTrimType::TRIM_LEFT) {
+        auto f3 = f1;
+
+        do {
+            f2 = std::ranges::find_if(++f3, end, is_space);
+            if (f2 == end)
+                break;
+            f3 = std::ranges::find_if_not(f2 + 1, end, is_space);
+        } while (f3 != end);
+    }
+
+    return VR(f1, f2);
+}
+
+template <traits::adc_char_range R>
+static auto AdcTrimSpacesView(R&& r, AdcTrimType type = AdcTrimType::TRIM_BOTH)
+{
+    return AdcTrimSpacesView<std::string_view>(std::forward<R>(r), type);
+}
+
+
 template <typename ValueT, traits::adc_char_range R>
 static ValueT AdcFromChars(R&& range)
 {