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generator/README.md

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+# Generator
+
+This utility should be used to regenerate tables based on Unicode Character
+Database (UCD).
+
+Current version of this utility builds tables and functions for the following
+properties:
+
+- Case mappings for lower, upper, title cases (1:1 and 1:M)
+- Case folding (1:1 and 1:M)
+- General category
+
+## Usage
+
+Compile `Tables.c`
+
+```
+gcc Tables.c -o Tables
+```
+
+Download and put `UnicodeData.txt`, `CaseFolding.txt`, `SpecialCasing.txt` near
+the compiled `Tables` program, run it and pipe output into `UCD.c`.
+
+```
+Tables > ../UCD.c
+```
+
+You can download required files from [here](https://www.unicode.org/Public/UCD/latest/ucd)