intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 86 insertions, 0 deletions

diff --git a/util/string/type.cpp b/util/string/type.cpp
new file mode 100644
index 0000000000..49671c02c2
--- /dev/null
+++ b/util/string/type.cpp
@@ -0,0 +1,86 @@
+#include "type.h"
+#include "ascii.h"
+
+#include <array>
+
+bool IsSpace(const char* s, size_t len) noexcept {
+    if (len == 0) {
+        return false;
+    }
+    for (const char* p = s; p < s + len; ++p) {
+        if (!IsAsciiSpace(*p)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+template <typename TStringType>
+static bool IsNumberT(const TStringType& s) noexcept {
+    if (s.empty()) {
+        return false;
+    }
+
+    return std::all_of(s.begin(), s.end(), IsAsciiDigit<typename TStringType::value_type>);
+}
+
+bool IsNumber(const TStringBuf s) noexcept {
+    return IsNumberT(s);
+}
+
+bool IsNumber(const TWtringBuf s) noexcept {
+    return IsNumberT(s);
+}
+
+template <typename TStringType>
+static bool IsHexNumberT(const TStringType& s) noexcept {
+    if (s.empty()) {
+        return false;
+    }
+
+    return std::all_of(s.begin(), s.end(), IsAsciiHex<typename TStringType::value_type>);
+}
+
+bool IsHexNumber(const TStringBuf s) noexcept {
+    return IsHexNumberT(s);
+}
+
+bool IsHexNumber(const TWtringBuf s) noexcept {
+    return IsHexNumberT(s);
+}
+
+namespace {
+    template <size_t N>
+    bool IsCaseInsensitiveAnyOf(TStringBuf str, const std::array<TStringBuf, N>& options) {
+        for (auto option : options) {
+            if (str.size() == option.size() && ::strnicmp(str.data(), option.data(), str.size()) == 0) {
+                return true;
+            }
+        }
+        return false;
+    }
+} //anonymous namespace
+
+bool IsTrue(const TStringBuf v) noexcept {
+    static constexpr std::array<TStringBuf, 7> trueOptions{
+        "true",
+        "t",
+        "yes",
+        "y",
+        "on",
+        "1",
+        "da"};
+    return IsCaseInsensitiveAnyOf(v, trueOptions);
+}
+
+bool IsFalse(const TStringBuf v) noexcept {
+    static constexpr std::array<TStringBuf, 7> falseOptions{
+        "false",
+        "f",
+        "no",
+        "n",
+        "off",
+        "0",
+        "net"};
+    return IsCaseInsensitiveAnyOf(v, falseOptions);
+}