mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2024-10-03 03:55:46 +00:00
188 lines
5.8 KiB
Python
188 lines
5.8 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright 2011-2015 The Rust Project Developers. See the COPYRIGHT
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# file at the top-level directory of this distribution and at
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# http://rust-lang.org/COPYRIGHT.
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#
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# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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# option. This file may not be copied, modified, or distributed
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# except according to those terms.
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# This script uses the following Unicode tables:
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# - DerivedCoreProperties.txt
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# - ReadMe.txt
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#
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# Since this should not require frequent updates, we just store this
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# out-of-line and check the unicode.rs file into git.
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import fileinput, re, os, sys
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preamble = '''// Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// NOTE: The following code was generated by "scripts/unicode.py", do not edit directly
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#![allow(missing_docs, non_upper_case_globals, non_snake_case)]
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'''
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def fetch(f):
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if not os.path.exists(os.path.basename(f)):
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os.system("curl -O http://www.unicode.org/Public/UNIDATA/%s"
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% f)
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if not os.path.exists(os.path.basename(f)):
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sys.stderr.write("cannot load %s" % f)
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exit(1)
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def group_cat(cat):
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cat_out = []
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letters = sorted(set(cat))
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cur_start = letters.pop(0)
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cur_end = cur_start
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for letter in letters:
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assert letter > cur_end, \
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"cur_end: %s, letter: %s" % (hex(cur_end), hex(letter))
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if letter == cur_end + 1:
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cur_end = letter
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else:
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cat_out.append((cur_start, cur_end))
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cur_start = cur_end = letter
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cat_out.append((cur_start, cur_end))
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return cat_out
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def ungroup_cat(cat):
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cat_out = []
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for (lo, hi) in cat:
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while lo <= hi:
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cat_out.append(lo)
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lo += 1
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return cat_out
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def format_table_content(f, content, indent):
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line = " "*indent
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first = True
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for chunk in content.split(","):
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if len(line) + len(chunk) < 98:
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if first:
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line += chunk
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else:
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line += ", " + chunk
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first = False
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else:
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f.write(line + ",\n")
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line = " "*indent + chunk
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f.write(line)
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def load_properties(f, interestingprops):
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fetch(f)
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props = {}
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re1 = re.compile("^ *([0-9A-F]+) *; *(\w+)")
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re2 = re.compile("^ *([0-9A-F]+)\.\.([0-9A-F]+) *; *(\w+)")
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for line in fileinput.input(os.path.basename(f)):
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prop = None
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d_lo = 0
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d_hi = 0
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m = re1.match(line)
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if m:
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d_lo = m.group(1)
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d_hi = m.group(1)
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prop = m.group(2)
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else:
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m = re2.match(line)
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if m:
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d_lo = m.group(1)
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d_hi = m.group(2)
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prop = m.group(3)
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else:
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continue
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if interestingprops and prop not in interestingprops:
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continue
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d_lo = int(d_lo, 16)
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d_hi = int(d_hi, 16)
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if prop not in props:
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props[prop] = []
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props[prop].append((d_lo, d_hi))
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# optimize if possible
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for prop in props:
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props[prop] = group_cat(ungroup_cat(props[prop]))
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return props
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def escape_char(c):
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return "'\\u{%x}'" % c
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def emit_bsearch_range_table(f):
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f.write("""
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fn bsearch_range_table(c: char, r: &'static [(char,char)]) -> bool {
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use core::cmp::Ordering::{Equal, Less, Greater};
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r.binary_search_by(|&(lo,hi)| {
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if lo <= c && c <= hi { Equal }
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else if hi < c { Less }
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else { Greater }
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}).is_ok()
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}\n
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""")
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def emit_table(f, name, t_data, t_type = "&'static [(char, char)]", is_pub=True,
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pfun=lambda x: "(%s,%s)" % (escape_char(x[0]), escape_char(x[1])), is_const=True):
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pub_string = "const"
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if not is_const:
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pub_string = "let"
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if is_pub:
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pub_string = "pub " + pub_string
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f.write(" %s %s: %s = &[\n" % (pub_string, name, t_type))
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data = ""
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first = True
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for dat in t_data:
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if not first:
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data += ","
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first = False
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data += pfun(dat)
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format_table_content(f, data, 8)
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f.write("\n ];\n\n")
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def emit_property_module(f, mod, tbl, emit):
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f.write("pub mod %s {\n" % mod)
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for cat in sorted(emit):
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emit_table(f, "%s_table" % cat, tbl[cat])
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f.write(" pub fn %s(c: char) -> bool {\n" % cat)
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f.write(" super::bsearch_range_table(c, %s_table)\n" % cat)
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f.write(" }\n\n")
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f.write("}\n\n")
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if __name__ == "__main__":
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r = "tables.rs"
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if os.path.exists(r):
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os.remove(r)
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with open(r, "w") as rf:
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# write the file's preamble
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rf.write(preamble)
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# download and parse all the data
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fetch("ReadMe.txt")
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with open("ReadMe.txt") as readme:
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pattern = "for Version (\d+)\.(\d+)\.(\d+) of the Unicode"
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unicode_version = re.search(pattern, readme.read()).groups()
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rf.write("""
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/// The version of [Unicode](http://www.unicode.org/)
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/// that this version of unicode-xid is based on.
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pub const UNICODE_VERSION: (u64, u64, u64) = (%s, %s, %s);
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""" % unicode_version)
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emit_bsearch_range_table(rf)
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want_derived = ["XID_Start", "XID_Continue"]
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derived = load_properties("DerivedCoreProperties.txt", want_derived)
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emit_property_module(rf, "derived_property", derived, want_derived)
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