| #!/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: |
| # - PropertyValueAliases.txt |
| # - ScriptExtensions.txt |
| # - Scripts.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)] |
| |
| pub use tables_impl::*; |
| |
| #[rustfmt::skip] |
| mod tables_impl { |
| use crate::ScriptExtension; |
| ''' |
| |
| # Close `mod impl {` |
| ending=''' |
| } |
| ''' |
| |
| UNICODE_VERSION = (15, 0, 0) |
| |
| UNICODE_VERSION_NUMBER = "%s.%s.%s" %UNICODE_VERSION |
| |
| def escape_char(c): |
| return "'\\u{%x}'" % c |
| |
| 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 https://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 group_cats(cats): |
| cats_out = {} |
| for cat in cats: |
| cats_out[cat] = group_cat(cats[cat]) |
| return cats_out |
| |
| def aliases(): |
| """ |
| Fetch the shorthand aliases for each longhand Script name |
| """ |
| fetch("PropertyValueAliases.txt") |
| longforms = {} |
| shortforms = {} |
| re1 = re.compile(r"^ *sc *; *(\w+) *; *(\w+)") |
| for line in fileinput.input(os.path.basename("PropertyValueAliases.txt")): |
| m = re1.match(line) |
| if m: |
| l = m.group(2).strip() |
| s = m.group(1).strip() |
| assert(s not in longforms) |
| assert(l not in shortforms) |
| longforms[s] = l |
| shortforms[l] = s |
| else: |
| continue |
| |
| return (longforms, shortforms) |
| |
| 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) |
| |
| # Implementation from unicode-segmentation |
| def load_properties(f, interestingprops): |
| fetch(f) |
| props = {} |
| # Note: these regexes are different from those in unicode-segmentation, |
| # becase we need to handle spaces here |
| re1 = re.compile(r"^ *([0-9A-F]+) *; *([^#]+) *#") |
| re2 = re.compile(r"^ *([0-9A-F]+)\.\.([0-9A-F]+) *; *([^#]+) *#") |
| |
| 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).strip() |
| else: |
| m = re2.match(line) |
| if m: |
| d_lo = m.group(1) |
| d_hi = m.group(2) |
| prop = m.group(3).strip() |
| 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)) |
| |
| return props |
| |
| # Implementation from unicode-segmentation |
| 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_search(f): |
| f.write(""" |
| pub fn bsearch_range_value_table<T: Copy>(c: char, r: &'static [(char, char, T)]) -> Option<T> { |
| 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]; |
| Some(cat) |
| } |
| Err(_) => None |
| } |
| } |
| |
| #[inline] |
| pub fn get_script(c: char) -> Option<Script> { |
| bsearch_range_value_table(c, SCRIPTS) |
| } |
| |
| #[inline] |
| pub fn get_script_extension(c: char) -> Option<ScriptExtension> { |
| bsearch_range_value_table(c, SCRIPT_EXTENSIONS) |
| } |
| """) |
| |
| def emit_enums(f, script_list, extension_list, longforms): |
| """ |
| Emit the Script and ScriptExtension enums as well as any related utility functions |
| """ |
| |
| f.write(""" |
| #[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)] |
| #[non_exhaustive] |
| #[allow(non_camel_case_types)] |
| #[repr(u8)] |
| /// A value of the `Script` property |
| pub enum Script { |
| /// Unknown script |
| Unknown = 0xFF, |
| /// Zyyy |
| Common = 0xFE, |
| /// Zinh, |
| Inherited = 0xFD, |
| """) |
| for (i, script) in enumerate(script_list): |
| f.write(" /// %s\n %s = %s,\n" % (script, longforms[script], i)) |
| f.write("}\n") |
| f.write("pub const NEXT_SCRIPT: u8 = %s;" % len(script_list)) |
| f.write(""" |
| |
| pub mod script_extensions { |
| use crate::ScriptExtension; |
| pub const COMMON: ScriptExtension = ScriptExtension::new_common(); |
| pub const INHERITED: ScriptExtension = ScriptExtension::new_inherited(); |
| pub const UNKNOWN: ScriptExtension = ScriptExtension::new_unknown(); |
| """) |
| for (i, script) in enumerate(script_list): |
| first = 0 |
| second = 0 |
| third = 0 |
| # need to replace L because `hex()` will spit out an L suffix for larger numbers |
| if i < 64: |
| first = hex(1 << i).replace("L", "") |
| elif i < 128: |
| second = hex(1 << (i - 64)).replace("L", "") |
| else: |
| third = hex(1 << (i - 128)).replace("L", "") |
| f.write(" /// %s\n pub const %s: ScriptExtension = ScriptExtension::new(%s, %s, %s);\n" % |
| (longforms[script], longforms[script].upper(), first, second, third)) |
| if script != longforms[script]: |
| f.write(" /// %s\n pub const %s: ScriptExtension = %s;\n" % |
| (longforms[script], script.upper(), longforms[script].upper())) |
| for ext in extension_list: |
| longform = ", ".join([longforms[s] for s in ext]) |
| name = "_".join([s.upper() for s in ext]) |
| expr = ext[0].upper() |
| for e in ext[1:]: |
| expr = "%s.union(%s)" % (expr, e.upper()) |
| f.write(" /// %s\n pub const %s: ScriptExtension = %s;\n" % (longform, name, expr)) |
| f.write("""} |
| |
| """) |
| |
| # Generate implementation for the `Script` |
| generate_script_impl(f) |
| |
| |
| def generate_script_impl(f): |
| """Generates an `impl Script { ... }` section with all the required functions""" |
| |
| # Open `impl Script` section. |
| f.write("""impl Script { |
| """) |
| |
| # Generate impl of `inner_full_name`. |
| f.write(""" |
| #[inline] |
| pub(crate) fn inner_full_name(self) -> &'static str { |
| match self { |
| Script::Unknown => "Unknown", |
| Script::Common => "Common", |
| Script::Inherited => "Inherited", |
| """) |
| for script in script_list: |
| f.write(" Script::%s => \"%s\",\n" % (longforms[script], longforms[script])) |
| f.write(""" } |
| } |
| """) |
| |
| # Generate impl of `inner_from_full_name`. |
| f.write(""" |
| #[inline] |
| pub(crate) fn inner_from_full_name(input: &str) -> Option<Self> { |
| match input { |
| "Unknown" => Some(Script::Unknown), |
| "Common" => Some(Script::Common), |
| "Inherited" => Some(Script::Inherited), |
| """) |
| for script in script_list: |
| f.write(" \"%s\" => Some(Script::%s),\n" % (longforms[script], longforms[script])) |
| f.write(" _ => None,\n" ) |
| f.write(""" } |
| } |
| """) |
| |
| # Generate impl of `inner_short_name` |
| f.write(""" |
| #[inline] |
| pub(crate) fn inner_short_name(self) -> &'static str { |
| match self { |
| Script::Unknown => "", |
| Script::Common => "Zyyy", |
| Script::Inherited => "Zinh", |
| """) |
| for script in script_list: |
| f.write(" Script::%s => \"%s\",\n" % (longforms[script], script)) |
| f.write(""" } |
| } |
| """) |
| |
| # Generate impl of `inner_from_short_name` |
| f.write(""" |
| #[inline] |
| pub(crate) fn inner_from_short_name(input: &str) -> Option<Self> { |
| match input { |
| "Zyyy" => Some(Script::Common), |
| "Zinh" => Some(Script::Inherited), |
| """) |
| for script in script_list: |
| f.write(" \"%s\" => Some(Script::%s),\n" % (script, longforms[script])) |
| f.write(""" _ => None,\n""") |
| f.write(""" } |
| } |
| """) |
| |
| # Generate impl of `for_integer` |
| f.write(""" |
| #[inline] |
| pub(crate) fn for_integer(value: u8) -> Self { |
| match value { |
| """) |
| for (i, script) in enumerate(script_list): |
| f.write(" %s => Script::%s,\n" % (i, longforms[script])) |
| f.write(""" _ => unreachable!(), |
| } |
| } |
| """) |
| |
| # Close `impl Script` section |
| f.write(""" |
| } |
| """) |
| |
| def extension_name(ext): |
| """Get the rust source for a given ScriptExtension""" |
| return "script_extensions::%s" % "_".join([e.upper() for e in ext]) |
| |
| |
| 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-script is based on. |
| pub const UNICODE_VERSION: (u64, u64, u64) = (%s, %s, %s); |
| """ % UNICODE_VERSION) |
| |
| |
| (longforms, shortforms) = aliases() |
| |
| scripts = load_properties("Scripts.txt", []) |
| |
| script_table = [] |
| script_list = [] |
| |
| for script in scripts: |
| if script not in ["Common", "Unknown", "Inherited"]: |
| script_list.append(shortforms[script]) |
| script_table.extend([(x, y, shortforms[script]) for (x, y) in scripts[script]]) |
| script_list.sort() |
| script_table.sort(key=lambda w: w[0]) |
| |
| |
| extensions = load_properties("ScriptExtensions.txt", []) |
| extension_table = [] |
| extension_list = [] |
| |
| for ext in extensions: |
| split = ext.split(" ") |
| split.sort() |
| output_ext = [ext] |
| if len(split) > 1: |
| extension_list.append(split) |
| output_ext = split |
| extension_table.extend([(x, y, output_ext) for (x, y) in extensions[ext]]) |
| extension_table.sort(key=lambda w: w[0]) |
| |
| |
| emit_enums(rf, script_list, extension_list, longforms) |
| emit_search(rf) |
| |
| emit_table(rf, "SCRIPTS", script_table, t_type = "&'static [(char, char, Script)]", |
| is_pub=False , pfun=lambda x: "(%s,%s, Script::%s)" % (escape_char(x[0]), escape_char(x[1]), longforms[x[2]])) |
| emit_table(rf, "SCRIPT_EXTENSIONS", extension_table, t_type = "&'static [(char, char, ScriptExtension)]", |
| is_pub=False , pfun=lambda x: "(%s,%s,%s)" % (escape_char(x[0]), escape_char(x[1]), extension_name(x[2]))) |
| |
| # emit_table(rf, "FOObar", properties) |
| |
| rf.write(ending) |
