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libxml2/genUnicode.py
Nick Wellnhofer ae23a4ce56 unicode: Deprecate most xmlUCSIs* functions 
These don't seem to be used by downstream code.
2024-04-30 17:42:59 +02:00

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#!/usr/bin/env python3
#
# Original script modified in November 2003 to take advantage of
# the character-validation range routines, and updated to the
# current Unicode information (Version 4.0.1)
#
# NOTE: there is an 'alias' facility for blocks which are not present in
# the current release, but are needed for ABI compatibility. This
# must be accomplished MANUALLY! Please see the comments below under
# 'blockAliases'
#
import sys
import string
import time
webpage = "http://www.unicode.org/Public/4.0-Update1/UCD-4.0.1.html"
sources = "Blocks-4.0.1.txt UnicodeData-4.0.1.txt"
#
# blockAliases is a small hack - it is used for mapping block names which
# were were used in the 3.1 release, but are missing or changed in the current
# release. The format is "OldBlockName:NewBlockName1[,NewBlockName2[,...]]"
blockAliases = []
blockAliases.append("CombiningMarksforSymbols:CombiningDiacriticalMarksforSymbols")
blockAliases.append("Greek:GreekandCoptic")
blockAliases.append("PrivateUse:PrivateUseArea,SupplementaryPrivateUseArea-A," +
"SupplementaryPrivateUseArea-B")
# minTableSize gives the minimum number of ranges which must be present
# before a range table is produced. If there are less than this
# number, inline comparisons are generated
minTableSize = 8
(blockfile, catfile) = sources.split()
#
# Now process the "blocks" file, reducing it to a dictionary
# indexed by blockname, containing a tuple with the applicable
# block range
#
BlockNames = {}
try:
blocks = open(blockfile, "r")
except:
print("Missing %s, aborting ..." % blockfile)
sys.exit(1)
for line in blocks.readlines():
if line[0] == '#':
continue
line = line.strip()
if line == '':
continue
try:
fields = line.split(';')
range = fields[0].strip()
(start, end) = range.split("..")
name = fields[1].strip()
name = name.replace(' ', '')
except:
print("Failed to process line: %s" % (line))
continue
start = "0x" + start
end = "0x" + end
try:
BlockNames[name].append((start, end))
except:
BlockNames[name] = [(start, end)]
blocks.close()
print("Parsed %d blocks descriptions" % (len(BlockNames.keys())))
for block in blockAliases:
alias = block.split(':')
alist = alias[1].split(',')
for comp in alist:
if comp in BlockNames:
if alias[0] not in BlockNames:
BlockNames[alias[0]] = []
for r in BlockNames[comp]:
BlockNames[alias[0]].append(r)
else:
print("Alias %s: %s not in Blocks" % (alias[0], comp))
continue
#
# Next process the Categories file. This is more complex, since
# the file is in code sequence, and we need to invert it. We use
# a dictionary with index category-name, with each entry containing
# all the ranges (codepoints) of that category. Note that category
# names comprise two parts - the general category, and the "subclass"
# within that category. Therefore, both "general category" (which is
# the first character of the 2-character category-name) and the full
# (2-character) name are entered into this dictionary.
#
try:
data = open(catfile, "r")
except:
print("Missing %s, aborting ..." % catfile)
sys.exit(1)
nbchar = 0;
Categories = {}
for line in data.readlines():
if line[0] == '#':
continue
line = line.strip()
if line == '':
continue
try:
fields = line.split(';')
point = fields[0].strip()
value = 0
while point != '':
value = value * 16
if point[0] >= '0' and point[0] <= '9':
value = value + ord(point[0]) - ord('0')
elif point[0] >= 'A' and point[0] <= 'F':
value = value + 10 + ord(point[0]) - ord('A')
elif point[0] >= 'a' and point[0] <= 'f':
value = value + 10 + ord(point[0]) - ord('a')
point = point[1:]
name = fields[2]
except:
print("Failed to process line: %s" % (line))
continue
nbchar = nbchar + 1
# update entry for "full name"
try:
Categories[name].append(value)
except:
try:
Categories[name] = [value]
except:
print("Failed to process line: %s" % (line))
# update "general category" name
try:
Categories[name[0]].append(value)
except:
try:
Categories[name[0]] = [value]
except:
print("Failed to process line: %s" % (line))
blocks.close()
print("Parsed %d char generating %d categories" % (nbchar, len(Categories.keys())))
#
# The data is now all read. Time to process it into a more useful form.
#
# reduce the number list into ranges
for cat in Categories.keys():
list = Categories[cat]
start = -1
prev = -1
end = -1
ranges = []
for val in list:
if start == -1:
start = val
prev = val
continue
elif val == prev + 1:
prev = val
continue
elif prev == start:
ranges.append((prev, prev))
start = val
prev = val
continue
else:
ranges.append((start, prev))
start = val
prev = val
continue
if prev == start:
ranges.append((prev, prev))
else:
ranges.append((start, prev))
Categories[cat] = ranges
#
# Assure all data is in alphabetic order, since we will be doing binary
# searches on the tables.
#
bkeys = sorted(BlockNames.keys())
ckeys = sorted(Categories.keys())
#
# Generate the resulting files
#
try:
header = open("include/libxml/xmlunicode.h", "w")
except:
print("Failed to open include/libxml/xmlunicode.h")
sys.exit(1)
try:
output = open("xmlunicode.c", "w")
except:
print("Failed to open xmlunicode.c")
sys.exit(1)
date = time.asctime(time.localtime(time.time()))
header.write(
"""/*
* Summary: Unicode character APIs
* Description: API for the Unicode character APIs
*
* This file is automatically generated from the
* UCS description files of the Unicode Character Database
* %s
* using the genUnicode.py Python script.
*
* Generation date: %s
* Sources: %s
* Author: Daniel Veillard
*/
#ifndef __XML_UNICODE_H__
#define __XML_UNICODE_H__
#include <libxml/xmlversion.h>
#ifdef LIBXML_UNICODE_ENABLED
#ifdef __cplusplus
extern "C" {
#endif
""" % (webpage, date, sources));
output.write(
"""/*
* xmlunicode.c: this module implements the Unicode character APIs
*
* This file is automatically generated from the
* UCS description files of the Unicode Character Database
* %s
* using the genUnicode.py Python script.
*
* Generation date: %s
* Sources: %s
* Daniel Veillard <veillard@redhat.com>
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_UNICODE_ENABLED
#include <string.h>
#include <libxml/xmlversion.h>
#include <libxml/xmlunicode.h>
#include <libxml/chvalid.h>
typedef int (xmlIntFunc)(int); /* just to keep one's mind untwisted */
typedef struct {
const char *rangename;
xmlIntFunc *func;
} xmlUnicodeRange;
typedef struct {
const xmlUnicodeRange *table;
int numentries;
} xmlUnicodeNameTable;
static xmlIntFunc *xmlUnicodeLookup(const xmlUnicodeNameTable *tptr, const char *tname);
static const xmlUnicodeRange xmlUnicodeBlocks[] = {
""" % (webpage, date, sources));
flag = 0
for block in bkeys:
name = block.replace('-', '')
if flag:
output.write(',\n')
else:
flag = 1
output.write(' {"%s", xmlUCSIs%s}' % (block, name))
output.write('};\n\n')
output.write('static const xmlUnicodeRange xmlUnicodeCats[] = {\n')
flag = 0;
for name in ckeys:
if flag:
output.write(',\n')
else:
flag = 1
output.write(' {"%s", xmlUCSIsCat%s}' % (name, name))
output.write('};\n\n')
#
# For any categories with more than minTableSize ranges we generate
# a range table suitable for xmlCharInRange
#
for name in ckeys:
if len(Categories[name]) > minTableSize:
numshort = 0
numlong = 0
ranges = Categories[name]
sptr = "NULL"
lptr = "NULL"
for range in ranges:
(low, high) = range
if high < 0x10000:
if numshort == 0:
pline = "static const xmlChSRange xml%sS[] = {" % name
sptr = "xml%sS" % name
else:
pline += ","
numshort += 1
else:
if numlong == 0:
if numshort > 0:
output.write(pline + " };\n")
pline = "static const xmlChLRange xml%sL[] = {" % name
lptr = "xml%sL" % name
else:
pline += ","
numlong += 1
if len(pline) > 60:
output.write(pline + "\n")
pline = " "
elif pline[-1:] == ",":
pline += " "
pline += "{%s, %s}" % (hex(low), hex(high))
output.write(pline + " };\nstatic const xmlChRangeGroup xml%sG = {%s,%s,%s,%s};\n\n"
% (name, numshort, numlong, sptr, lptr))
output.write(
"""static const xmlUnicodeNameTable xmlUnicodeBlockTbl = {xmlUnicodeBlocks, %s};
static const xmlUnicodeNameTable xmlUnicodeCatTbl = {xmlUnicodeCats, %s};
/**
* xmlUnicodeLookup:
* @tptr: pointer to the name table
* @name: name to be found
*
* binary table lookup for user-supplied name
*
* Returns pointer to range function if found, otherwise NULL
*/
static xmlIntFunc
*xmlUnicodeLookup(const xmlUnicodeNameTable *tptr, const char *tname) {
int low, high, mid, cmp;
const xmlUnicodeRange *sptr;
if ((tptr == NULL) || (tname == NULL)) return(NULL);
low = 0;
high = tptr->numentries - 1;
sptr = tptr->table;
while (low <= high) {
mid = (low + high) / 2;
if ((cmp=strcmp(tname, sptr[mid].rangename)) == 0)
return (sptr[mid].func);
if (cmp < 0)
high = mid - 1;
else
low = mid + 1;
}
return (NULL);
}
""" % (len(BlockNames), len(Categories)) )
for block in bkeys:
name = block.replace('-', '')
header.write("XML_DEPRECATED\nXMLPUBFUN int xmlUCSIs%s\t(int code);\n" % name)
output.write("/**\n * xmlUCSIs%s:\n * @code: UCS code point\n" % (name))
output.write(" *\n * Check whether the character is part of %s UCS Block\n"%
(block))
output.write(" *\n * Returns 1 if true 0 otherwise\n */\n");
output.write("int\nxmlUCSIs%s(int code) {\n return(" % name)
flag = 0
for (start, end) in BlockNames[block]:
if flag:
output.write(" ||\n ")
else:
flag = 1
output.write("((code >= %s) && (code <= %s))" % (start, end))
output.write(");\n}\n\n")
header.write("\nXMLPUBFUN int xmlUCSIsBlock\t(int code, const char *block);\n\n")
output.write(
"""/**
* xmlUCSIsBlock:
* @code: UCS code point
* @block: UCS block name
*
* Check whether the character is part of the UCS Block
*
* Returns 1 if true, 0 if false and -1 on unknown block
*/
int
xmlUCSIsBlock(int code, const char *block) {
xmlIntFunc *func;
func = xmlUnicodeLookup(&xmlUnicodeBlockTbl, block);
if (func == NULL)
return (-1);
return (func(code));
}
""")
for name in ckeys:
ranges = Categories[name]
header.write("XML_DEPRECATED\nXMLPUBFUN int xmlUCSIsCat%s\t(int code);\n" % name)
output.write("/**\n * xmlUCSIsCat%s:\n * @code: UCS code point\n" % (name))
output.write(" *\n * Check whether the character is part of %s UCS Category\n"%
(name))
output.write(" *\n * Returns 1 if true 0 otherwise\n */\n");
output.write("int\nxmlUCSIsCat%s(int code) {\n" % name)
if len(Categories[name]) > minTableSize:
output.write(" return(xmlCharInRange((unsigned int)code, &xml%sG)"
% name)
else:
start = 1
for range in ranges:
(begin, end) = range;
if start:
output.write(" return(");
start = 0
else:
output.write(" ||\n ");
if (begin == end):
output.write("(code == %s)" % (hex(begin)))
else:
output.write("((code >= %s) && (code <= %s))" % (
hex(begin), hex(end)))
output.write(");\n}\n\n")
header.write("\nXMLPUBFUN int xmlUCSIsCat\t(int code, const char *cat);\n")
output.write(
"""/**
* xmlUCSIsCat:
* @code: UCS code point
* @cat: UCS Category name
*
* Check whether the character is part of the UCS Category
*
* Returns 1 if true, 0 if false and -1 on unknown category
*/
int
xmlUCSIsCat(int code, const char *cat) {
xmlIntFunc *func;
func = xmlUnicodeLookup(&xmlUnicodeCatTbl, cat);
if (func == NULL)
return (-1);
return (func(code));
}
#endif /* LIBXML_UNICODE_ENABLED */
""")
header.write("""
#ifdef __cplusplus
}
#endif
#endif /* LIBXML_UNICODE_ENABLED */
#endif /* __XML_UNICODE_H__ */
""");
header.close()
output.close()
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