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rust/src/libstd_unicode/unicode.py
Collin Anderson 261d4d8185 fix some python3 incompatibilities
2017-11-16 13:34:13 -05:00

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#!/usr/bin/env python
#
# Copyright 2011-2013 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
# - DerivedNormalizationProps.txt
# - EastAsianWidth.txt
# - auxiliary/GraphemeBreakProperty.txt
# - PropList.txt
# - ReadMe.txt
# - Scripts.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, operator, math
preamble = '''// Copyright 2012-2016 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 "./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': ['No'],
'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)
def fetch(f):
if not os.path.exists(os.path.basename(f)):
os.system("curl -O http://www.unicode.org/Public/UNIDATA/%s"
% f)
if not os.path.exists(os.path.basename(f)):
sys.stderr.write("cannot load %s" % f)
exit(1)
def is_surrogate(n):
return surrogate_codepoints[0] <= n <= surrogate_codepoints[1]
def load_unicode_data(f):
fetch(f)
gencats = {}
to_lower = {}
to_upper = {}
to_title = {}
combines = {}
canon_decomp = {}
compat_decomp = {}
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]
# generate char to char direct common and simple conversions
# uppercase to lowercase
if lowcase != "" and code_org != lowcase:
to_lower[code] = (int(lowcase, 16), 0, 0)
# lowercase to uppercase
if upcase != "" and code_org != upcase:
to_upper[code] = (int(upcase, 16), 0, 0)
# title case
if titlecase.strip() != "" and code_org != titlecase:
to_title[code] = (int(titlecase, 16), 0, 0)
# store decomposition, if given
if decomp != "":
if decomp.startswith('<'):
seq = []
for i in decomp.split()[1:]:
seq.append(int(i, 16))
compat_decomp[code] = seq
else:
seq = []
for i in decomp.split():
seq.append(int(i, 16))
canon_decomp[code] = seq
# 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)
# record combining class, if any
if combine != "0":
if combine not in combines:
combines[combine] = []
combines[combine].append(code)
# generate Not_Assigned from Assigned
gencats["Cn"] = gen_unassigned(gencats["Assigned"])
# Assigned is not a real category
del(gencats["Assigned"])
# Other contains Not_Assigned
gencats["C"].extend(gencats["Cn"])
gencats = group_cats(gencats)
combines = to_combines(group_cats(combines))
return (canon_decomp, compat_decomp, gencats, combines, to_upper, to_lower, to_title)
def load_special_casing(f, to_upper, to_lower, to_title):
fetch(f)
for line in fileinput.input(f):
data = line.split('#')[0].split(';')
if len(data) == 5:
code, lower, title, upper, _comment = data
elif len(data) == 6:
code, lower, title, upper, condition, _comment = data
if condition.strip(): # Only keep unconditional mappins
continue
else:
continue
code = code.strip()
lower = lower.strip()
title = title.strip()
upper = upper.strip()
key = int(code, 16)
for (map_, values) in [(to_lower, lower), (to_upper, upper), (to_title, title)]:
if values != code:
values = [int(i, 16) for i in values.split()]
for _ in range(len(values), 3):
values.append(0)
assert len(values) == 3
map_[key] = values
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 gen_unassigned(assigned):
assigned = set(assigned)
return ([i for i in range(0, 0xd800) if i not in assigned] +
[i for i in range(0xe000, 0x110000) if i not in assigned])
def to_combines(combs):
combs_out = []
for comb in combs:
for (lo, hi) in combs[comb]:
combs_out.append((lo, hi, comb))
combs_out.sort(key=lambda comb: comb[0])
return combs_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("^ *([0-9A-F]+) *; *(\w+)")
re2 = re.compile("^ *([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 if c != 0 else "'\\0'"
def emit_bsearch_range_table(f):
f.write("""
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 c < lo {
Greater
} else if hi < c {
Less
} else {
Equal
}
})
.is_ok()
}\n
""")
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]))):
pub_string = ""
if is_pub:
pub_string = "pub "
f.write(" %sconst %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_trie_lookup_range_table(f):
f.write("""
// BoolTrie is a trie for representing a set of Unicode codepoints. It is
// implemented with postfix compression (sharing of identical child nodes),
// which gives both compact size and fast lookup.
//
// The space of Unicode codepoints is divided into 3 subareas, each
// represented by a trie with different depth. In the first (0..0x800), there
// is no trie structure at all; each u64 entry corresponds to a bitvector
// effectively holding 64 bool values.
//
// In the second (0x800..0x10000), each child of the root node represents a
// 64-wide subrange, but instead of storing the full 64-bit value of the leaf,
// the trie stores an 8-bit index into a shared table of leaf values. This
// exploits the fact that in reasonable sets, many such leaves can be shared.
//
// In the third (0x10000..0x110000), each child of the root node represents a
// 4096-wide subrange, and the trie stores an 8-bit index into a 64-byte slice
// of a child tree. Each of these 64 bytes represents an index into the table
// of shared 64-bit leaf values. This exploits the sparse structure in the
// non-BMP range of most Unicode sets.
pub struct BoolTrie {
// 0..0x800 (corresponding to 1 and 2 byte utf-8 sequences)
r1: [u64; 32], // leaves
// 0x800..0x10000 (corresponding to 3 byte utf-8 sequences)
r2: [u8; 992], // first level
r3: &'static [u64], // leaves
// 0x10000..0x110000 (corresponding to 4 byte utf-8 sequences)
r4: [u8; 256], // first level
r5: &'static [u8], // second level
r6: &'static [u64], // leaves
}
fn trie_range_leaf(c: usize, bitmap_chunk: u64) -> bool {
((bitmap_chunk >> (c & 63)) & 1) != 0
}
fn trie_lookup_range_table(c: char, r: &'static BoolTrie) -> bool {
let c = c as usize;
if c < 0x800 {
trie_range_leaf(c, r.r1[c >> 6])
} else if c < 0x10000 {
let child = r.r2[(c >> 6) - 0x20];
trie_range_leaf(c, r.r3[child as usize])
} else {
let child = r.r4[(c >> 12) - 0x10];
let leaf = r.r5[((child as usize) << 6) + ((c >> 6) & 0x3f)];
trie_range_leaf(c, r.r6[leaf as usize])
}
}
pub struct SmallBoolTrie {
r1: &'static [u8], // first level
r2: &'static [u64], // leaves
}
impl SmallBoolTrie {
fn lookup(&self, c: char) -> bool {
let c = c as usize;
match self.r1.get(c >> 6) {
Some(&child) => trie_range_leaf(c, self.r2[child as usize]),
None => false,
}
}
}
""")
def compute_trie(rawdata, chunksize):
root = []
childmap = {}
child_data = []
for i in range(len(rawdata) // chunksize):
data = rawdata[i * chunksize: (i + 1) * chunksize]
child = '|'.join(map(str, data))
if child not in childmap:
childmap[child] = len(childmap)
child_data.extend(data)
root.append(childmap[child])
return (root, child_data)
def emit_bool_trie(f, name, t_data, is_pub=True):
CHUNK = 64
rawdata = [False] * 0x110000
for (lo, hi) in t_data:
for cp in range(lo, hi + 1):
rawdata[cp] = True
# convert to bitmap chunks of 64 bits each
chunks = []
for i in range(0x110000 // CHUNK):
chunk = 0
for j in range(64):
if rawdata[i * 64 + j]:
chunk |= 1 << j
chunks.append(chunk)
pub_string = ""
if is_pub:
pub_string = "pub "
f.write(" %sconst %s: &'static super::BoolTrie = &super::BoolTrie {\n" % (pub_string, name))
f.write(" r1: [\n")
data = ','.join('0x%016x' % chunk for chunk in chunks[0:0x800 // CHUNK])
format_table_content(f, data, 12)
f.write("\n ],\n")
# 0x800..0x10000 trie
(r2, r3) = compute_trie(chunks[0x800 // CHUNK : 0x10000 // CHUNK], 64 // CHUNK)
f.write(" r2: [\n")
data = ','.join(str(node) for node in r2)
format_table_content(f, data, 12)
f.write("\n ],\n")
f.write(" r3: &[\n")
data = ','.join('0x%016x' % chunk for chunk in r3)
format_table_content(f, data, 12)
f.write("\n ],\n")
# 0x10000..0x110000 trie
(mid, r6) = compute_trie(chunks[0x10000 // CHUNK : 0x110000 // CHUNK], 64 // CHUNK)
(r4, r5) = compute_trie(mid, 64)
f.write(" r4: [\n")
data = ','.join(str(node) for node in r4)
format_table_content(f, data, 12)
f.write("\n ],\n")
f.write(" r5: &[\n")
data = ','.join(str(node) for node in r5)
format_table_content(f, data, 12)
f.write("\n ],\n")
f.write(" r6: &[\n")
data = ','.join('0x%016x' % chunk for chunk in r6)
format_table_content(f, data, 12)
f.write("\n ],\n")
f.write(" };\n\n")
def emit_small_bool_trie(f, name, t_data, is_pub=True):
last_chunk = max(hi // 64 for (lo, hi) in t_data)
n_chunks = last_chunk + 1
chunks = [0] * n_chunks
for (lo, hi) in t_data:
for cp in range(lo, hi + 1):
if cp // 64 >= len(chunks):
print(cp, cp // 64, len(chunks), lo, hi)
chunks[cp // 64] |= 1 << (cp & 63)
pub_string = ""
if is_pub:
pub_string = "pub "
f.write(" %sconst %s: &'static super::SmallBoolTrie = &super::SmallBoolTrie {\n"
% (pub_string, name))
(r1, r2) = compute_trie(chunks, 1)
f.write(" r1: &[\n")
data = ','.join(str(node) for node in r1)
format_table_content(f, data, 12)
f.write("\n ],\n")
f.write(" r2: &[\n")
data = ','.join('0x%016x' % node for node in r2)
format_table_content(f, data, 12)
f.write("\n ],\n")
f.write(" };\n\n")
def emit_property_module(f, mod, tbl, emit):
f.write("pub mod %s {\n" % mod)
for cat in sorted(emit):
if cat in ["Cc", "White_Space", "Pattern_White_Space"]:
emit_small_bool_trie(f, "%s_table" % cat, tbl[cat])
f.write(" pub fn %s(c: char) -> bool {\n" % cat)
f.write(" %s_table.lookup(c)\n" % cat)
f.write(" }\n\n")
else:
emit_bool_trie(f, "%s_table" % cat, tbl[cat])
f.write(" pub fn %s(c: char) -> bool {\n" % cat)
f.write(" super::trie_lookup_range_table(c, %s_table)\n" % cat)
f.write(" }\n\n")
f.write("}\n\n")
def emit_conversions_module(f, to_upper, to_lower, to_title):
f.write("pub mod conversions {")
f.write("""
use core::option::Option;
use core::option::Option::{Some, None};
pub fn to_lower(c: char) -> [char; 3] {
match bsearch_case_table(c, to_lowercase_table) {
None => [c, '\\0', '\\0'],
Some(index) => to_lowercase_table[index].1,
}
}
pub fn to_upper(c: char) -> [char; 3] {
match bsearch_case_table(c, to_uppercase_table) {
None => [c, '\\0', '\\0'],
Some(index) => to_uppercase_table[index].1,
}
}
fn bsearch_case_table(c: char, table: &'static [(char, [char; 3])]) -> Option<usize> {
table.binary_search_by(|&(key, _)| key.cmp(&c)).ok()
}
""")
t_type = "&'static [(char, [char; 3])]"
pfun = lambda x: "(%s,[%s,%s,%s])" % (
escape_char(x[0]), escape_char(x[1][0]), escape_char(x[1][1]), escape_char(x[1][2]))
emit_table(f, "to_lowercase_table",
sorted(to_lower.items(), key=operator.itemgetter(0)),
is_pub=False, t_type = t_type, pfun=pfun)
emit_table(f, "to_uppercase_table",
sorted(to_upper.items(), key=operator.itemgetter(0)),
is_pub=False, t_type = t_type, pfun=pfun)
f.write("}\n\n")
def emit_norm_module(f, canon, compat, combine, norm_props):
canon_keys = sorted(canon.keys())
compat_keys = sorted(compat.keys())
canon_comp = {}
comp_exclusions = norm_props["Full_Composition_Exclusion"]
for char in canon_keys:
if any(lo <= char <= hi for lo, hi in comp_exclusions):
continue
decomp = canon[char]
if len(decomp) == 2:
if decomp[0] not in canon_comp:
canon_comp[decomp[0]] = []
canon_comp[decomp[0]].append( (decomp[1], char) )
canon_comp_keys = sorted(canon_comp.keys())
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)
# download and parse all the data
fetch("ReadMe.txt")
with open("ReadMe.txt") as readme:
pattern = "for Version (\d+)\.(\d+)\.(\d+) of the Unicode"
unicode_version = re.search(pattern, readme.read()).groups()
rf.write("""
/// Represents a Unicode Version.
///
/// See also: <http://www.unicode.org/versions/>
#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
pub struct UnicodeVersion {
/// Major version.
pub major: u32,
/// Minor version.
pub minor: u32,
/// Micro (or Update) version.
pub micro: u32,
// Private field to keep struct expandable.
_priv: (),
}
/// The version of [Unicode](http://www.unicode.org/) that the Unicode parts of
/// `CharExt` and `UnicodeStrPrelude` traits are based on.
pub const UNICODE_VERSION: UnicodeVersion = UnicodeVersion {
major: %s,
minor: %s,
micro: %s,
_priv: (),
};
""" % unicode_version)
(canon_decomp, compat_decomp, gencats, combines,
to_upper, to_lower, to_title) = load_unicode_data("UnicodeData.txt")
load_special_casing("SpecialCasing.txt", to_upper, to_lower, to_title)
want_derived = ["XID_Start", "XID_Continue", "Alphabetic", "Lowercase", "Uppercase",
"Cased", "Case_Ignorable"]
derived = load_properties("DerivedCoreProperties.txt", want_derived)
scripts = load_properties("Scripts.txt", [])
props = load_properties("PropList.txt",
["White_Space", "Join_Control", "Noncharacter_Code_Point", "Pattern_White_Space"])
norm_props = load_properties("DerivedNormalizationProps.txt",
["Full_Composition_Exclusion"])
# trie_lookup_table is used in all the property modules below
emit_trie_lookup_range_table(rf)
# emit_bsearch_range_table(rf)
# category tables
for (name, cat, pfuns) in ("general_category", gencats, ["N", "Cc"]), \
("derived_property", derived, want_derived), \
("property", props, ["White_Space", "Pattern_White_Space"]):
emit_property_module(rf, name, cat, pfuns)
# normalizations and conversions module
emit_norm_module(rf, canon_decomp, compat_decomp, combines, norm_props)
emit_conversions_module(rf, to_upper, to_lower, to_title)
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