diff options
Diffstat (limited to 'unicode-segmentation/scripts/unicode.py')
| -rwxr-xr-x | unicode-segmentation/scripts/unicode.py | 375 |
1 files changed, 375 insertions, 0 deletions
diff --git a/unicode-segmentation/scripts/unicode.py b/unicode-segmentation/scripts/unicode.py new file mode 100755 index 0000000..580b3c0 --- /dev/null +++ b/unicode-segmentation/scripts/unicode.py @@ -0,0 +1,375 @@ +#!/usr/bin/env python +# +# Copyright 2011-2015 The Rust Project Developers. See the COPYRIGHT +# file at the top-level directory of this distribution and at +# http://rust-lang.org/COPYRIGHT. +# +# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or +# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license +# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your +# option. This file may not be copied, modified, or distributed +# except according to those terms. + +# This script uses the following Unicode tables: +# - DerivedCoreProperties.txt +# - auxiliary/GraphemeBreakProperty.txt +# - auxiliary/WordBreakProperty.txt +# - ReadMe.txt +# - UnicodeData.txt +# +# Since this should not require frequent updates, we just store this +# out-of-line and check the unicode.rs file into git. + +import fileinput, re, os, sys + +preamble = '''// Copyright 2012-2018 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or +// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license +// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +// NOTE: The following code was generated by "scripts/unicode.py", do not edit directly + +#![allow(missing_docs, non_upper_case_globals, non_snake_case)] +''' + +# Mapping taken from Table 12 from: +# http://www.unicode.org/reports/tr44/#General_Category_Values +expanded_categories = { + 'Lu': ['LC', 'L'], 'Ll': ['LC', 'L'], 'Lt': ['LC', 'L'], + 'Lm': ['L'], 'Lo': ['L'], + 'Mn': ['M'], 'Mc': ['M'], 'Me': ['M'], + 'Nd': ['N'], 'Nl': ['N'], 'No': ['N'], + 'Pc': ['P'], 'Pd': ['P'], 'Ps': ['P'], 'Pe': ['P'], + 'Pi': ['P'], 'Pf': ['P'], 'Po': ['P'], + 'Sm': ['S'], 'Sc': ['S'], 'Sk': ['S'], 'So': ['S'], + 'Zs': ['Z'], 'Zl': ['Z'], 'Zp': ['Z'], + 'Cc': ['C'], 'Cf': ['C'], 'Cs': ['C'], 'Co': ['C'], 'Cn': ['C'], +} + +# these are the surrogate codepoints, which are not valid rust characters +surrogate_codepoints = (0xd800, 0xdfff) + +UNICODE_VERSION = (12, 0, 0) + +UNICODE_VERSION_NUMBER = "%s.%s.%s" %UNICODE_VERSION + +def is_surrogate(n): + return surrogate_codepoints[0] <= n <= surrogate_codepoints[1] + +def fetch(f): + if not os.path.exists(os.path.basename(f)): + if "emoji" in f: + os.system("curl -O https://www.unicode.org/Public/emoji/%s.%s/%s" + % (UNICODE_VERSION[0], UNICODE_VERSION[1], f)) + else: + os.system("curl -O http://www.unicode.org/Public/%s/ucd/%s" + % (UNICODE_VERSION_NUMBER, f)) + + if not os.path.exists(os.path.basename(f)): + sys.stderr.write("cannot load %s" % f) + exit(1) + +def load_gencats(f): + fetch(f) + gencats = {} + + udict = {}; + range_start = -1; + for line in fileinput.input(f): + data = line.split(';'); + if len(data) != 15: + continue + cp = int(data[0], 16); + if is_surrogate(cp): + continue + if range_start >= 0: + for i in range(range_start, cp): + udict[i] = data; + range_start = -1; + if data[1].endswith(", First>"): + range_start = cp; + continue; + udict[cp] = data; + + for code in udict: + [code_org, name, gencat, combine, bidi, + decomp, deci, digit, num, mirror, + old, iso, upcase, lowcase, titlecase ] = udict[code]; + + # place letter in categories as appropriate + for cat in [gencat, "Assigned"] + expanded_categories.get(gencat, []): + if cat not in gencats: + gencats[cat] = [] + gencats[cat].append(code) + + gencats = group_cats(gencats) + return gencats + +def group_cats(cats): + cats_out = {} + for cat in cats: + cats_out[cat] = group_cat(cats[cat]) + return cats_out + +def group_cat(cat): + cat_out = [] + letters = sorted(set(cat)) + cur_start = letters.pop(0) + cur_end = cur_start + for letter in letters: + assert letter > cur_end, \ + "cur_end: %s, letter: %s" % (hex(cur_end), hex(letter)) + if letter == cur_end + 1: + cur_end = letter + else: + cat_out.append((cur_start, cur_end)) + cur_start = cur_end = letter + cat_out.append((cur_start, cur_end)) + return cat_out + +def ungroup_cat(cat): + cat_out = [] + for (lo, hi) in cat: + while lo <= hi: + cat_out.append(lo) + lo += 1 + return cat_out + +def format_table_content(f, content, indent): + line = " "*indent + first = True + for chunk in content.split(","): + if len(line) + len(chunk) < 98: + if first: + line += chunk + else: + line += ", " + chunk + first = False + else: + f.write(line + ",\n") + line = " "*indent + chunk + f.write(line) + +def load_properties(f, interestingprops): + fetch(f) + props = {} + re1 = re.compile(r"^ *([0-9A-F]+) *; *(\w+)") + re2 = re.compile(r"^ *([0-9A-F]+)\.\.([0-9A-F]+) *; *(\w+)") + + for line in fileinput.input(os.path.basename(f)): + prop = None + d_lo = 0 + d_hi = 0 + m = re1.match(line) + if m: + d_lo = m.group(1) + d_hi = m.group(1) + prop = m.group(2) + else: + m = re2.match(line) + if m: + d_lo = m.group(1) + d_hi = m.group(2) + prop = m.group(3) + else: + continue + if interestingprops and prop not in interestingprops: + continue + d_lo = int(d_lo, 16) + d_hi = int(d_hi, 16) + if prop not in props: + props[prop] = [] + props[prop].append((d_lo, d_hi)) + + # optimize if possible + for prop in props: + props[prop] = group_cat(ungroup_cat(props[prop])) + + return props + +def escape_char(c): + return "'\\u{%x}'" % c + +def emit_table(f, name, t_data, t_type = "&'static [(char, char)]", is_pub=True, + pfun=lambda x: "(%s,%s)" % (escape_char(x[0]), escape_char(x[1])), is_const=True): + pub_string = "const" + if not is_const: + pub_string = "let" + if is_pub: + pub_string = "pub " + pub_string + f.write(" %s %s: %s = &[\n" % (pub_string, name, t_type)) + data = "" + first = True + for dat in t_data: + if not first: + data += "," + first = False + data += pfun(dat) + format_table_content(f, data, 8) + f.write("\n ];\n\n") + +def emit_util_mod(f): + f.write(""" +pub mod util { + #[inline] + pub fn bsearch_range_table(c: char, r: &'static [(char,char)]) -> bool { + use core::cmp::Ordering::{Equal, Less, Greater}; + r.binary_search_by(|&(lo,hi)| { + if lo <= c && c <= hi { Equal } + else if hi < c { Less } + else { Greater } + }).is_ok() + } + + #[inline] + fn is_alphabetic(c: char) -> bool { + match c { + 'a' ... 'z' | 'A' ... 'Z' => true, + c if c > '\x7f' => super::derived_property::Alphabetic(c), + _ => false, + } + } + + #[inline] + fn is_numeric(c: char) -> bool { + match c { + '0' ... '9' => true, + c if c > '\x7f' => super::general_category::N(c), + _ => false, + } + } + + #[inline] + pub fn is_alphanumeric(c: char) -> bool { + is_alphabetic(c) || is_numeric(c) + } +} + +""") + +def emit_property_module(f, mod, tbl, emit): + f.write("mod %s {\n" % mod) + for cat in sorted(emit): + emit_table(f, "%s_table" % cat, tbl[cat], is_pub=False) + f.write(" #[inline]\n") + f.write(" pub fn %s(c: char) -> bool {\n" % cat) + f.write(" super::util::bsearch_range_table(c, %s_table)\n" % cat) + f.write(" }\n\n") + f.write("}\n\n") + +def emit_break_module(f, break_table, break_cats, name): + Name = name.capitalize() + f.write("""pub mod %s { + use core::result::Result::{Ok, Err}; + + pub use self::%sCat::*; + + #[allow(non_camel_case_types)] + #[derive(Clone, Copy, PartialEq, Eq, Debug)] + pub enum %sCat { +""" % (name, Name, Name)) + + break_cats.append("Any") + break_cats.sort() + for cat in break_cats: + f.write((" %sC_" % Name[0]) + cat + ",\n") + f.write(""" } + + fn bsearch_range_value_table(c: char, r: &'static [(char, char, %sCat)]) -> %sCat { + use core::cmp::Ordering::{Equal, Less, Greater}; + match r.binary_search_by(|&(lo, hi, _)| { + if lo <= c && c <= hi { Equal } + else if hi < c { Less } + else { Greater } + }) { + Ok(idx) => { + let (_, _, cat) = r[idx]; + cat + } + Err(_) => %sC_Any + } + } + + pub fn %s_category(c: char) -> %sCat { + bsearch_range_value_table(c, %s_cat_table) + } + +""" % (Name, Name, Name[0], name, Name, name)) + + emit_table(f, "%s_cat_table" % name, break_table, "&'static [(char, char, %sCat)]" % Name, + pfun=lambda x: "(%s,%s,%sC_%s)" % (escape_char(x[0]), escape_char(x[1]), Name[0], x[2]), + is_pub=False, is_const=True) + f.write("}\n") + +if __name__ == "__main__": + r = "tables.rs" + if os.path.exists(r): + os.remove(r) + with open(r, "w") as rf: + # write the file's preamble + rf.write(preamble) + rf.write(""" +/// The version of [Unicode](http://www.unicode.org/) +/// that this version of unicode-segmentation is based on. +pub const UNICODE_VERSION: (u64, u64, u64) = (%s, %s, %s); +""" % UNICODE_VERSION) + + # download and parse all the data + gencats = load_gencats("UnicodeData.txt") + derived = load_properties("DerivedCoreProperties.txt", ["Alphabetic"]) + + emit_util_mod(rf) + for (name, cat, pfuns) in ("general_category", gencats, ["N"]), \ + ("derived_property", derived, ["Alphabetic"]): + emit_property_module(rf, name, cat, pfuns) + + ### grapheme cluster module + # from http://www.unicode.org/reports/tr29/#Grapheme_Cluster_Break_Property_Values + grapheme_cats = load_properties("auxiliary/GraphemeBreakProperty.txt", []) + + # Control + # Note: + # This category also includes Cs (surrogate codepoints), but Rust's `char`s are + # Unicode Scalar Values only, and surrogates are thus invalid `char`s. + # Thus, we have to remove Cs from the Control category + grapheme_cats["Control"] = group_cat(list( + set(ungroup_cat(grapheme_cats["Control"])) + - set(ungroup_cat([surrogate_codepoints])))) + + grapheme_table = [] + for cat in grapheme_cats: + grapheme_table.extend([(x, y, cat) for (x, y) in grapheme_cats[cat]]) + emoji_props = load_properties("emoji-data.txt", ["Extended_Pictographic"]) + grapheme_table.extend([(x, y, "Extended_Pictographic") for (x, y) in emoji_props["Extended_Pictographic"]]) + grapheme_table.sort(key=lambda w: w[0]) + last = -1 + for chars in grapheme_table: + if chars[0] <= last: + raise "Grapheme tables and Extended_Pictographic values overlap; need to store these separately!" + last = chars[1] + emit_break_module(rf, grapheme_table, list(grapheme_cats.keys()) + ["Extended_Pictographic"], "grapheme") + rf.write("\n") + + word_cats = load_properties("auxiliary/WordBreakProperty.txt", []) + word_table = [] + for cat in word_cats: + word_table.extend([(x, y, cat) for (x, y) in word_cats[cat]]) + word_table.sort(key=lambda w: w[0]) + emit_break_module(rf, word_table, list(word_cats.keys()), "word") + + # There are some emoji which are also ALetter, so this needs to be stored separately + # For efficiency, we could still merge the two tables and produce an ALetterEP state + emoji_table = [(x, y, "Extended_Pictographic") for (x, y) in emoji_props["Extended_Pictographic"]] + emit_break_module(rf, emoji_table, ["Extended_Pictographic"], "emoji") + + sentence_cats = load_properties("auxiliary/SentenceBreakProperty.txt", []) + sentence_table = [] + for cat in sentence_cats: + sentence_table.extend([(x, y, cat) for (x, y) in sentence_cats[cat]]) + sentence_table.sort(key=lambda w: w[0]) + emit_break_module(rf, sentence_table, list(sentence_cats.keys()), "sentence") |