From 3d7a431811748c5aa1f49c35436696fc3f05de5d Mon Sep 17 00:00:00 2001
From: Roland Reichwein <mail@reichwein.it>
Date: Fri, 5 Feb 2021 14:10:53 +0100
Subject: Documentation, support validation via Traits

---
 debian/README.Debian | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)

(limited to 'debian/README.Debian')

diff --git a/debian/README.Debian b/debian/README.Debian
index 162e3f0..382d20d 100644
--- a/debian/README.Debian
+++ b/debian/README.Debian
@@ -4,6 +4,81 @@ unicode for Debian
 This package is the Debian version of unicode, a C++ library for Unicode encoding.
 
 
+CLI interface (package unicode-tools)
+-------------------------------------
+
+* unicode-recode
+
+  Usage: recode <from-format> <from-file> <to-format> <to-file>
+  Format:
+      UTF-8       UTF-8
+      UTF-16      UTF-16, native endian
+      UTF-16LE    UTF-16, little endian
+      UTF-16BE    UTF-16, big endian
+      UTF-32      UTF-32, native endian
+      UTF-32LE    UTF-32, little endian
+      UTF-32BE    UTF-32, big endian
+      ISO-8859-1  ISO-8859-1 (Latin-1)
+      ISO-8859-15 ISO-8859-15 (Latin-9)
+  Exit code: 0 if valid, 1 otherwise.
+
+* unicode-validate
+
+  Usage: validate <format> <file>
+  Format:
+      UTF-8     UTF-8
+      UTF-16    UTF-16, big or little endian
+      UTF-16LE  UTF-16, little endian
+      UTF-16BE  UTF-16, big endian
+      UTF-32    UTF-32, big or little endian
+      UTF-32LE  UTF-32, little endian
+      UTF-32BE  UTF-32, big endian
+  Exit code: 0 if valid, 1 otherwise.
+
+
+C++ interface (package libunicode-dev)
+--------------------------------------
+
+Example:
+
+#include <unicode.h>
+...
+
+  std::string utf8_value {u8"äöü"};
+  std::u16string utf16_value{unicode::convert<char, char16_t>(utf8_value)};
+
+And for C++20:
+
+  std::u8string utf8_value {u8"äöü"};
+  std::u16string utf16_value{unicode::convert<char8_t, char16_t>(utf8_value)};
+
+The following encodings are implicitly deducted from types:
+  * char resp. char8_t (C++20): UTF-8
+  * char16_t: UTF-16
+  * char32_t: UTF-32
+
+Explicit encoding specification is also possible:
+
+  std::string value {"äöü"};
+  std::u32string utf32_value{unicode::convert<unicode::ISO_8859_1, unicode::UTF_32>(value)};
+
+Supported encodings are:
+
+  * unicode::UTF_8
+  * unicode::UTF_16
+  * unicode::UTF_32
+  * unicode::ISO_8859_1
+  * unicode::ISO_8859_15
+
+Validation can be done like this:
+
+  bool valid{unicode::is_valid_utf<char16_t>(utf16_value)};
+
+Or via explicit encoding specification:
+
+  bool valid{unicode::is_valid_utf<unicode::UTF_8>(utf8_value)};
+
+
 Contact
 -------
 
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