329 lines
9.4 KiB
C++
329 lines
9.4 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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**********************************************************************
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* Copyright (c) 2002-2014, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Author: Alan Liu
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* Created: October 30 2002
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* Since: ICU 2.4
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* 2010nov19 Markus Scherer Rewrite for formatVersion 2.
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**********************************************************************
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*/
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#include "propname.h"
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#include "unicode/uchar.h"
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#include "unicode/udata.h"
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#include "unicode/uscript.h"
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#include "umutex.h"
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#include "cmemory.h"
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#include "cstring.h"
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#include "uarrsort.h"
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#include "uinvchar.h"
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#define INCLUDED_FROM_PROPNAME_CPP
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#include "propname_data.h"
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U_CDECL_BEGIN
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/**
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* Get the next non-ignorable ASCII character from a property name
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* and lowercases it.
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* @return ((advance count for the name)<<8)|character
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*/
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static inline int32_t
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getASCIIPropertyNameChar(const char *name) {
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int32_t i;
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char c;
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/* Ignore delimiters '-', '_', and ASCII White_Space */
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for(i=0;
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(c=name[i++])==0x2d || c==0x5f ||
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c==0x20 || (0x09<=c && c<=0x0d);
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) {}
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if(c!=0) {
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return (i<<8)|(uint8_t)uprv_asciitolower((char)c);
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} else {
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return i<<8;
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}
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}
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/**
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* Get the next non-ignorable EBCDIC character from a property name
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* and lowercases it.
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* @return ((advance count for the name)<<8)|character
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*/
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static inline int32_t
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getEBCDICPropertyNameChar(const char *name) {
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int32_t i;
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char c;
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/* Ignore delimiters '-', '_', and EBCDIC White_Space */
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for(i=0;
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(c=name[i++])==0x60 || c==0x6d ||
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c==0x40 || c==0x05 || c==0x15 || c==0x25 || c==0x0b || c==0x0c || c==0x0d;
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) {}
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if(c!=0) {
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return (i<<8)|(uint8_t)uprv_ebcdictolower((char)c);
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} else {
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return i<<8;
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}
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}
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/**
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* Unicode property names and property value names are compared "loosely".
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*
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* UCD.html 4.0.1 says:
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* For all property names, property value names, and for property values for
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* Enumerated, Binary, or Catalog properties, use the following
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* loose matching rule:
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*
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* LM3. Ignore case, whitespace, underscore ('_'), and hyphens.
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*
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* This function does just that, for (char *) name strings.
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* It is almost identical to ucnv_compareNames() but also ignores
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* C0 White_Space characters (U+0009..U+000d, and U+0085 on EBCDIC).
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*
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* @internal
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*/
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U_CAPI int32_t U_EXPORT2
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uprv_compareASCIIPropertyNames(const char *name1, const char *name2) {
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int32_t rc, r1, r2;
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for(;;) {
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r1=getASCIIPropertyNameChar(name1);
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r2=getASCIIPropertyNameChar(name2);
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/* If we reach the ends of both strings then they match */
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if(((r1|r2)&0xff)==0) {
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return 0;
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}
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/* Compare the lowercased characters */
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if(r1!=r2) {
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rc=(r1&0xff)-(r2&0xff);
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if(rc!=0) {
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return rc;
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}
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}
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name1+=r1>>8;
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name2+=r2>>8;
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}
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}
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U_CAPI int32_t U_EXPORT2
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uprv_compareEBCDICPropertyNames(const char *name1, const char *name2) {
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int32_t rc, r1, r2;
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for(;;) {
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r1=getEBCDICPropertyNameChar(name1);
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r2=getEBCDICPropertyNameChar(name2);
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/* If we reach the ends of both strings then they match */
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if(((r1|r2)&0xff)==0) {
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return 0;
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}
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/* Compare the lowercased characters */
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if(r1!=r2) {
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rc=(r1&0xff)-(r2&0xff);
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if(rc!=0) {
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return rc;
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}
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}
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name1+=r1>>8;
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name2+=r2>>8;
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}
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}
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U_CDECL_END
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U_NAMESPACE_BEGIN
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int32_t PropNameData::findProperty(int32_t property) {
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int32_t i=1; // valueMaps index, initially after numRanges
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for(int32_t numRanges=valueMaps[0]; numRanges>0; --numRanges) {
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// Read and skip the start and limit of this range.
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int32_t start=valueMaps[i];
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int32_t limit=valueMaps[i+1];
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i+=2;
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if(property<start) {
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break;
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}
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if(property<limit) {
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return i+(property-start)*2;
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}
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i+=(limit-start)*2; // Skip all entries for this range.
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}
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return 0;
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}
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int32_t PropNameData::findPropertyValueNameGroup(int32_t valueMapIndex, int32_t value) {
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if(valueMapIndex==0) {
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return 0; // The property does not have named values.
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}
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++valueMapIndex; // Skip the BytesTrie offset.
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int32_t numRanges=valueMaps[valueMapIndex++];
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if(numRanges<0x10) {
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// Ranges of values.
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for(; numRanges>0; --numRanges) {
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// Read and skip the start and limit of this range.
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int32_t start=valueMaps[valueMapIndex];
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int32_t limit=valueMaps[valueMapIndex+1];
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valueMapIndex+=2;
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if(value<start) {
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break;
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}
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if(value<limit) {
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return valueMaps[valueMapIndex+value-start];
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}
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valueMapIndex+=limit-start; // Skip all entries for this range.
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}
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} else {
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// List of values.
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int32_t valuesStart=valueMapIndex;
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int32_t nameGroupOffsetsStart=valueMapIndex+numRanges-0x10;
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do {
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int32_t v=valueMaps[valueMapIndex];
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if(value<v) {
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break;
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}
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if(value==v) {
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return valueMaps[nameGroupOffsetsStart+valueMapIndex-valuesStart];
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}
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} while(++valueMapIndex<nameGroupOffsetsStart);
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}
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return 0;
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}
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const char *PropNameData::getName(const char *nameGroup, int32_t nameIndex) {
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int32_t numNames=*nameGroup++;
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if(nameIndex<0 || numNames<=nameIndex) {
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return NULL;
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}
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// Skip nameIndex names.
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for(; nameIndex>0; --nameIndex) {
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nameGroup=uprv_strchr(nameGroup, 0)+1;
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}
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if(*nameGroup==0) {
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return NULL; // no name (Property[Value]Aliases.txt has "n/a")
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}
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return nameGroup;
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}
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UBool PropNameData::containsName(BytesTrie &trie, const char *name) {
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if(name==NULL) {
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return false;
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}
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UStringTrieResult result=USTRINGTRIE_NO_VALUE;
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char c;
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while((c=*name++)!=0) {
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c=uprv_invCharToLowercaseAscii(c);
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// Ignore delimiters '-', '_', and ASCII White_Space.
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if(c==0x2d || c==0x5f || c==0x20 || (0x09<=c && c<=0x0d)) {
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continue;
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}
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if(!USTRINGTRIE_HAS_NEXT(result)) {
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return false;
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}
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result=trie.next((uint8_t)c);
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}
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return USTRINGTRIE_HAS_VALUE(result);
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}
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const char *PropNameData::getPropertyName(int32_t property, int32_t nameChoice) {
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int32_t valueMapIndex=findProperty(property);
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if(valueMapIndex==0) {
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return NULL; // Not a known property.
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}
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return getName(nameGroups+valueMaps[valueMapIndex], nameChoice);
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}
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const char *PropNameData::getPropertyValueName(int32_t property, int32_t value, int32_t nameChoice) {
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int32_t valueMapIndex=findProperty(property);
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if(valueMapIndex==0) {
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return NULL; // Not a known property.
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}
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int32_t nameGroupOffset=findPropertyValueNameGroup(valueMaps[valueMapIndex+1], value);
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if(nameGroupOffset==0) {
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return NULL;
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}
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return getName(nameGroups+nameGroupOffset, nameChoice);
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}
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int32_t PropNameData::getPropertyOrValueEnum(int32_t bytesTrieOffset, const char *alias) {
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BytesTrie trie(bytesTries+bytesTrieOffset);
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if(containsName(trie, alias)) {
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return trie.getValue();
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} else {
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return UCHAR_INVALID_CODE;
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}
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}
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int32_t PropNameData::getPropertyEnum(const char *alias) {
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return getPropertyOrValueEnum(0, alias);
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}
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int32_t PropNameData::getPropertyValueEnum(int32_t property, const char *alias) {
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int32_t valueMapIndex=findProperty(property);
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if(valueMapIndex==0) {
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return UCHAR_INVALID_CODE; // Not a known property.
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}
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valueMapIndex=valueMaps[valueMapIndex+1];
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if(valueMapIndex==0) {
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return UCHAR_INVALID_CODE; // The property does not have named values.
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}
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// valueMapIndex is the start of the property's valueMap,
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// where the first word is the BytesTrie offset.
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return getPropertyOrValueEnum(valueMaps[valueMapIndex], alias);
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}
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U_NAMESPACE_END
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//----------------------------------------------------------------------
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// Public API implementation
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U_CAPI const char* U_EXPORT2
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u_getPropertyName(UProperty property,
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UPropertyNameChoice nameChoice) {
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U_NAMESPACE_USE
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return PropNameData::getPropertyName(property, nameChoice);
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}
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U_CAPI UProperty U_EXPORT2
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u_getPropertyEnum(const char* alias) {
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U_NAMESPACE_USE
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return (UProperty)PropNameData::getPropertyEnum(alias);
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}
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U_CAPI const char* U_EXPORT2
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u_getPropertyValueName(UProperty property,
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int32_t value,
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UPropertyNameChoice nameChoice) {
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U_NAMESPACE_USE
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return PropNameData::getPropertyValueName(property, value, nameChoice);
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}
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U_CAPI int32_t U_EXPORT2
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u_getPropertyValueEnum(UProperty property,
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const char* alias) {
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U_NAMESPACE_USE
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return PropNameData::getPropertyValueEnum(property, alias);
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}
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U_CAPI const char* U_EXPORT2
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uscript_getName(UScriptCode scriptCode){
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return u_getPropertyValueName(UCHAR_SCRIPT, scriptCode,
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U_LONG_PROPERTY_NAME);
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}
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U_CAPI const char* U_EXPORT2
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uscript_getShortName(UScriptCode scriptCode){
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return u_getPropertyValueName(UCHAR_SCRIPT, scriptCode,
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U_SHORT_PROPERTY_NAME);
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}
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