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fune/third_party/rust/unicode-normalization/scripts/unicode.py
Chun-Min Chang 2e5d3014c7 Bug 1681811 - Update mp4parse-rust to 3d9efdc r=jbauman 
Import the improvements made in mp4parse-rust repo. The changes would
save some redundant copy when calling avif related APIs and provide the
ability to get the alpha data of the parsed avif image.

Differential Revision: https://phabricator.services.mozilla.com/D98950
2020-12-14 22:31:07 +00:00

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#!/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:
# - DerivedNormalizationProps.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, collections
preamble = '''// Copyright 2012-2015 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.
// 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': ['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)
combines = {}
canon_decomp = {}
compat_decomp = {}
general_category_mark = []
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 xrange(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];
# 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
# record combining class, if any
if combine != "0":
if combine not in combines:
combines[combine] = []
combines[combine].append(code)
if 'M' in [gencat] + expanded_categories.get(gencat, []):
general_category_mark.append(code)
general_category_mark = group_cat(general_category_mark)
combines = to_combines(group_cats(combines))
return (canon_decomp, compat_decomp, combines, general_category_mark)
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 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):
indent = " "*indent
for c in content:
f.write("%s%s,\n" % (indent, c))
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
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))
format_table_content(f, [pfun(d) for d in t_data], 8)
f.write("\n ];\n\n")
def emit_strtab_table(f, name, keys, vfun, is_pub=True,
tab_entry_type='char', slice_element_sfun=escape_char):
pub_string = ""
if is_pub:
pub_string = "pub "
f.write(" %s const %s: &'static [(char, Slice)] = &[\n"
% (pub_string, name))
strtab = collections.OrderedDict()
strtab_offset = 0
# TODO: a more sophisticated algorithm here would not only check for the
# existence of v in the strtab, but also v in contiguous substrings of
# strtab, if that's possible.
for k in keys:
v = tuple(vfun(k))
if v in strtab:
item_slice = strtab[v]
else:
value_len = len(v)
item_slice = (strtab_offset, value_len)
strtab[v] = item_slice
strtab_offset += value_len
f.write("%s(%s, Slice { offset: %d, length: %d }),\n"
% (" "*8, escape_char(k), item_slice[0], item_slice[1]))
f.write("\n ];\n\n")
f.write(" %s const %s_STRTAB: &'static [%s] = &[\n"
% (pub_string, name, tab_entry_type))
for (v, _) in strtab.iteritems():
f.write("%s%s,\n" % (" "*8, ', '.join(slice_element_sfun(c) for c in v)))
f.write("\n ];\n\n")
def emit_norm_module(f, canon, compat, combine, norm_props, general_category_mark):
canon_keys = canon.keys()
canon_keys.sort()
compat_keys = compat.keys()
compat_keys.sort()
canon_comp = {}
comp_exclusions = norm_props["Full_Composition_Exclusion"]
for char in canon_keys:
if True in map(lambda (lo, hi): lo <= char <= hi, comp_exclusions):
continue
decomp = canon[char]
if len(decomp) == 2:
if not canon_comp.has_key(decomp[0]):
canon_comp[decomp[0]] = []
canon_comp[decomp[0]].append( (decomp[1], char) )
canon_comp_keys = canon_comp.keys()
canon_comp_keys.sort()
f.write("pub mod normalization {\n")
f.write("""
pub struct Slice {
pub offset: u16,
pub length: u16,
}
""")
def mkdata_fun(table):
def f(char):
return table[char]
return f
# TODO: should the strtab of these two tables be of type &'static str, for
# smaller data?
f.write(" // Canonical decompositions\n")
emit_strtab_table(f, "canonical_table", canon_keys,
vfun=mkdata_fun(canon))
f.write(" // Compatibility decompositions\n")
emit_strtab_table(f, "compatibility_table", compat_keys,
vfun=mkdata_fun(compat))
def comp_vfun(char):
return sorted(canon_comp[char], lambda x, y: x[0] - y[0])
f.write(" // Canonical compositions\n")
# "&'static [(char, &'static [(char, char)])]", pfun=comp_pfun)
emit_strtab_table(f, "composition_table", canon_comp_keys,
vfun=comp_vfun,
tab_entry_type="(char, char)",
slice_element_sfun=lambda pair: "(%s,%s)" % (escape_char(pair[0]),
escape_char(pair[1])))
f.write("""
fn bsearch_range_value_table(c: char, r: &'static [(char, char, u8)]) -> u8 {
use std::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 (_, _, result) = r[idx];
result
}
Err(_) => 0
}
}\n
""")
emit_table(f, "combining_class_table", combine, "&'static [(char, char, u8)]", is_pub=False,
pfun=lambda x: "(%s,%s,%s)" % (escape_char(x[0]), escape_char(x[1]), x[2]))
f.write(" pub fn canonical_combining_class(c: char) -> u8 {\n"
+ " bsearch_range_value_table(c, combining_class_table)\n"
+ " }\n")
f.write("""
fn bsearch_range_table(c: char, r: &'static [(char, char)]) -> bool {
use std::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()
}
/// Return whether the given character is a combining mark (`General_Category=Mark`)
pub fn is_combining_mark(c: char) -> bool {
bsearch_range_table(c, general_category_mark)
}
""")
emit_table(f, "general_category_mark", general_category_mark, "&'static [(char, char)]", is_pub=False,
pfun=lambda x: "(%s,%s)" % (escape_char(x[0]), escape_char(x[1])))
f.write("""
}
""")
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("""
/// The version of [Unicode](http://www.unicode.org/)
/// that this version of unicode-normalization is based on.
pub const UNICODE_VERSION: (u64, u64, u64) = (%s, %s, %s);
""" % unicode_version)
(canon_decomp, compat_decomp, combines, general_category_mark) = \
load_unicode_data("UnicodeData.txt")
norm_props = load_properties("DerivedNormalizationProps.txt",
["Full_Composition_Exclusion"])
# normalizations and conversions module
emit_norm_module(rf, canon_decomp, compat_decomp, combines, norm_props,
general_category_mark)
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