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ext/libpqxx-7.7.3/include/pqxx/internal/encoding_group.hxx

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+/** Enum type for supporting encodings in libpqxx
+ *
+ * Copyright (c) 2000-2022, Jeroen T. Vermeulen.
+ *
+ * See COPYING for copyright license.  If you did not receive a file called
+ * COPYING with this source code, please notify the distributor of this
+ * mistake, or contact the author.
+ */
+#ifndef PQXX_H_ENCODING_GROUP
+#define PQXX_H_ENCODING_GROUP
+
+#include <cstddef>
+
+namespace pqxx::internal
+{
+// Types of encodings supported by PostgreSQL, see
+// https://www.postgresql.org/docs/current/static/multibyte.html#CHARSET-TABLE
+enum class encoding_group
+{
+  // Handles all single-byte fixed-width encodings
+  MONOBYTE,
+
+  // Multibyte encodings.
+  // Many of these can embed ASCII-like bytes inside multibyte characters,
+  // notably Big5, SJIS, SHIFT_JIS_2004, GP18030, GBK, JOHAB, UHC.
+  BIG5,
+  EUC_CN,
+  // TODO: Merge EUC_JP and EUC_JIS_2004?
+  EUC_JP,
+  EUC_JIS_2004,
+  EUC_KR,
+  EUC_TW,
+  GB18030,
+  GBK,
+  JOHAB,
+  MULE_INTERNAL,
+  // TODO: Merge SJIS and SHIFT_JIS_2004?
+  SJIS,
+  SHIFT_JIS_2004,
+  UHC,
+  UTF8,
+};
+
+
+// TODO:: Can we just use string_view now?
+/// Function type: "find the end of the current glyph."
+/** This type of function takes a text buffer, and a location in that buffer,
+ * and returns the location one byte past the end of the current glyph.
+ *
+ * The start offset marks the beginning of the current glyph.  It must fall
+ * within the buffer.
+ *
+ * There are multiple different glyph scanner implementations, for different
+ * kinds of encodings.
+ */
+using glyph_scanner_func =
+  std::size_t(char const buffer[], std::size_t buffer_len, std::size_t start);
+} // namespace pqxx::internal
+
+#endif