[TableGen] Split the target description generator

1 files changed, 92 insertions, 0 deletions

diff --git a/backend/lib/TableGen/Record.cpp b/backend/lib/TableGen/Record.cpp
new file mode 100644
index 0000000..c8981c6
--- /dev/null
+++ b/backend/lib/TableGen/Record.cpp
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "rcc/TableGen/Record.h"
+
+#include <algorithm>
+#include <cctype>
+#include <ranges>
+
+namespace rcc::targetgen {
+
+[[nodiscard]] std::string lowerASCII(std::string_view Value) {
+  std::string Result(Value);
+  for (char &Character : Result) {
+    if (Character >= 'A' && Character <= 'Z')
+      Character = static_cast<char>(Character - 'A' + 'a');
+  }
+  return Result;
+}
+
+[[nodiscard]] bool isIdentifier(std::string_view Value) noexcept {
+  if (Value.empty())
+    return false;
+  const auto IsHead = [](unsigned char Character) {
+    return std::isalpha(Character) != 0 || Character == '_';
+  };
+  const auto IsTail = [](unsigned char Character) {
+    return std::isalnum(Character) != 0 || Character == '_';
+  };
+  if (!IsHead(static_cast<unsigned char>(Value.front())))
+    return false;
+  return std::ranges::all_of(Value.substr(1), [IsTail](char Character) {
+    return IsTail(static_cast<unsigned char>(Character));
+  });
+}
+
+[[nodiscard]] bool isAssemblyMnemonic(std::string_view Value) noexcept {
+  if (Value.empty())
+    return false;
+  if (std::islower(static_cast<unsigned char>(Value.front())) == 0)
+    return false;
+  if (std::islower(static_cast<unsigned char>(Value.back())) == 0 &&
+      std::isdigit(static_cast<unsigned char>(Value.back())) == 0)
+    return false;
+  return std::ranges::all_of(Value, [](char Character) {
+    const unsigned char Code = static_cast<unsigned char>(Character);
+    return std::islower(Code) != 0 || std::isdigit(Code) != 0 || Character == '.' ||
+           Character == '_';
+  });
+}
+
+[[nodiscard]] std::string upperIdentifier(std::string_view Value) {
+  std::string Result;
+  Result.reserve(Value.size());
+  for (const char Character : Value) {
+    if (Character >= 'a' && Character <= 'z')
+      Result.push_back(static_cast<char>(Character - 'a' + 'A'));
+    else if ((Character >= 'A' && Character <= 'Z') || (Character >= '0' && Character <= '9'))
+      Result.push_back(Character);
+    else
+      Result.push_back('_');
+  }
+  return Result;
+}
+
+void appendQuoted(std::ostream &Output, std::string_view Value) {
+  Output << '"';
+  for (const char Character : Value) {
+    switch (Character) {
+    case '\\':
+      Output << "\\\\";
+      break;
+    case '"':
+      Output << "\\\"";
+      break;
+    case '\n':
+      Output << "\\n";
+      break;
+    case '\r':
+      Output << "\\r";
+      break;
+    case '\t':
+      Output << "\\t";
+      break;
+    default:
+      Output << Character;
+      break;
+    }
+  }
+  Output << '"';
+}
+
+} // namespace rcc::targetgen