887 lines
30 KiB
C
887 lines
30 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2000, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: genmbcs.c
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2000jul06
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* created by: Markus W. Scherer
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*/
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#include <stdio.h>
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#include "unicode/utypes.h"
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#include "cstring.h"
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#include "cmemory.h"
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#include "unewdata.h"
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#include "ucnvmbcs.h"
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#include "genmbcs.h"
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enum {
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MBCS_STATE_FLAG_DIRECT=1,
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MBCS_STATE_FLAG_SURROGATES,
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MBCS_STATE_FLAG_READY=16
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};
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enum {
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MBCS_MAX_STATE_COUNT=128,
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MBCS_MAX_FALLBACK_COUNT=1000
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};
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struct MBCSData {
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/* toUnicode */
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int32_t stateTable[MBCS_MAX_STATE_COUNT][256];
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uint32_t stateFlags[MBCS_MAX_STATE_COUNT],
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stateOffsetSum[MBCS_MAX_STATE_COUNT];
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_MBCSToUFallback toUFallbacks[MBCS_MAX_FALLBACK_COUNT];
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uint16_t *unicodeCodeUnits;
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_MBCSHeader header;
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uint32_t countToUCodeUnits;
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/* fromUnicode */
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uint16_t table[0x20440];
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uint8_t *fromUBytes;
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uint32_t stage2Top, stage3Top, maxCharLength;
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};
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static void
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MBCSInit(MBCSData *mbcsData, uint8_t maxCharLength) {
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uprv_memset(mbcsData, 0, sizeof(MBCSData));
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mbcsData->header.version[0]=1;
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mbcsData->stateFlags[0]=MBCS_STATE_FLAG_DIRECT;
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mbcsData->maxCharLength=maxCharLength;
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mbcsData->header.flags=maxCharLength-1; /* outputType */
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}
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MBCSData *
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MBCSOpen(uint8_t maxCharLength) {
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MBCSData *mbcsData=(MBCSData *)uprv_malloc(sizeof(MBCSData));
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if(mbcsData!=NULL) {
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MBCSInit(mbcsData, maxCharLength);
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}
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return mbcsData;
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}
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void
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MBCSClose(MBCSData *mbcsData) {
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if(mbcsData!=NULL) {
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if(mbcsData->unicodeCodeUnits!=NULL) {
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uprv_free(mbcsData->unicodeCodeUnits);
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}
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if(mbcsData->fromUBytes!=NULL) {
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uprv_free(mbcsData->fromUBytes);
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}
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uprv_free(mbcsData);
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}
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}
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const char *
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skipWhitespace(const char *s) {
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while(*s==' ' || *s=='\t') {
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++s;
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}
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return s;
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}
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/*
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* state table row grammar (ebnf-style):
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* (whitespace is allowed between all tokens)
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*
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* row=[firstentry ','] entry (',' entry)*
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* firstentry="initial" | "surrogates"
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* (initial state (default for state 0), output is all surrogate pairs)
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* entry=range [':' nextstate] ['.' action]
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* range=number ['-' number]
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* nextstate=number
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* (0..7f)
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* action='u' | 's' | 'p'
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* (unassigned, state change only, surrogate pair)
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* number=(1- or 2-digit hexadecimal number)
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*/
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static const char *
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parseState(const char *s, int32_t state[256], uint32_t *pFlags) {
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const char *t;
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uint32_t start, end, i;
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int32_t value;
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/* initialize the state */
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for(i=0; i<256; ++i) {
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state[i]=0x80000000|(MBCS_STATE_ILLEGAL<<27);
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}
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/* skip leading white space */
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s=skipWhitespace(s);
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/* is there a "direct" or "surrogates" directive? */
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if(uprv_strncmp("direct", s, 6)==0) {
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*pFlags=MBCS_STATE_FLAG_DIRECT;
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s=skipWhitespace(s+6);
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if(*s++!=',') {
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return s-1;
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}
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} else if(*pFlags==0 && uprv_strncmp("surrogates", s, 10)==0) {
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*pFlags=MBCS_STATE_FLAG_SURROGATES;
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s=skipWhitespace(s+10);
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if(*s++!=',') {
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return s-1;
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}
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}
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for(;;) {
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/* read an entry, the start of the range first */
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s=skipWhitespace(s);
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start=uprv_strtoul(s, (char **)&t, 16);
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if(s==t || 0xff<start) {
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return s;
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}
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s=skipWhitespace(t);
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/* read the end of the range if there is one */
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if(*s=='-') {
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s=skipWhitespace(s+1);
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end=uprv_strtoul(s, (char **)&t, 16);
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if(s==t || end<start || 0xff<end) {
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return s;
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}
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s=skipWhitespace(t);
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} else {
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end=start;
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}
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/* determine the state values for this range */
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if(*s!=':' && *s!='.') {
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/* the default is: final state with valid entries */
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value=0x80000000|(MBCS_STATE_VALID_16<<27UL);
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} else {
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value=0;
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if(*s==':') {
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/* get the next state, default to 0 */
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s=skipWhitespace(s+1);
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i=uprv_strtoul(s, (char **)&t, 16);
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if(s!=t) {
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if(0x7f<i) {
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return s;
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}
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s=skipWhitespace(t);
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value|=i;
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}
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}
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/* get the state action, default to valid */
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if(*s=='.') {
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/* this is a final state */
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value|=0x80000000;
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s=skipWhitespace(s+1);
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if(*s=='u') {
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value|=MBCS_STATE_UNASSIGNED<<27UL;
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s=skipWhitespace(s+1);
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} else if(*s=='p') {
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if(*pFlags!=MBCS_STATE_FLAG_DIRECT) {
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value|=MBCS_STATE_VALID_16_PAIR<<27UL;
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} else {
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value|=MBCS_STATE_VALID_16<<27UL;
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}
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s=skipWhitespace(s+1);
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} else if(*s=='s') {
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value|=MBCS_STATE_CHANGE_ONLY<<27UL;
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s=skipWhitespace(s+1);
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} else {
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value|=MBCS_STATE_VALID_16<<27UL;
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}
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} else {
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/* this is an intermediate state, nothing to do */
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}
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}
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/* adjust "final valid" states according to the state flags */
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if(((uint32_t)value>>27U)==(16|MBCS_STATE_VALID_16)) {
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switch(*pFlags) {
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case 0:
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/* no adjustment */
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break;
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case MBCS_STATE_FLAG_DIRECT:
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/* set the valid-direct code point to "unassigned"==0xfffe */
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value=value&0x87ffffff|(MBCS_STATE_VALID_DIRECT_16<<27UL)|(0xfffe<<7L);
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break;
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case MBCS_STATE_FLAG_SURROGATES:
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value=value&0x87ffffff|(MBCS_STATE_VALID_16_PAIR<<27UL);
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break;
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default:
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break;
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}
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}
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/* set this value for the range */
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for(i=start; i<=end; ++i) {
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state[i]=value;
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}
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if(*s==',') {
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++s;
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} else {
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return *s==0 ? NULL : s;
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}
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}
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}
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UBool
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MBCSAddState(MBCSData *mbcsData, const char *s) {
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const char *error;
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if(mbcsData->header.countStates==MBCS_MAX_STATE_COUNT) {
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fprintf(stderr, "error: too many states (maximum %u)\n", MBCS_MAX_STATE_COUNT);
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return FALSE;
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}
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error=parseState(s, mbcsData->stateTable[mbcsData->header.countStates],
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&mbcsData->stateFlags[mbcsData->header.countStates]);
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if(error!=NULL) {
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fprintf(stderr, "parse error in state definition at '%s'\n", error);
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return FALSE;
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}
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++mbcsData->header.countStates;
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return TRUE;
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}
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UBool
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MBCSProcessStates(MBCSData *mbcsData) {
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uint32_t sum, i;
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int32_t entry;
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int state, cell, count;
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UBool allStatesReady;
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/*
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* first make sure that all "next state" values are within limits
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* and that all next states after final ones have the "direct"
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* flag of initial states
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*/
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for(state=mbcsData->header.countStates-1; state>=0; --state) {
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for(cell=0; cell<256; ++cell) {
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entry=mbcsData->stateTable[state][cell];
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if((uint32_t)(entry&0x7f)>=mbcsData->header.countStates) {
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fprintf(stderr, "error: state table entry [%x][%x] has a next state of %x that is too high\n",
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state, cell, entry&0x7f);
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return FALSE;
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}
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if(entry<0 && mbcsData->stateFlags[entry&0x7f]!=MBCS_STATE_FLAG_DIRECT) {
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fprintf(stderr, "error: state table entry [%x][%x] is final but has a non-initial next state of %x\n",
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state, cell, entry&0x7f);
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return FALSE;
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}
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}
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}
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/*
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* Sum up the offsets for all states.
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* In each final state (where there are only final entries),
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* the offsets add up directly.
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* In all other state table rows, for each transition entry to another state,
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* the offsets sum of that state needs to be added.
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* This is achieved in at most countStates iterations.
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*/
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allStatesReady=FALSE;
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for(count=mbcsData->header.countStates; !allStatesReady && count>=0; --count) {
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allStatesReady=TRUE;
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for(state=mbcsData->header.countStates-1; state>=0; --state) {
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if(!(mbcsData->stateFlags[state]&MBCS_STATE_FLAG_READY)) {
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allStatesReady=FALSE;
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sum=0;
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/* at first, add up only the final delta offsets to keep them <512 */
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for(cell=0; cell<256; ++cell) {
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entry=mbcsData->stateTable[state][cell];
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if(entry<0) {
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switch((uint32_t)entry>>27U) {
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case 16|MBCS_STATE_VALID_16:
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mbcsData->stateTable[state][cell]=entry&0xf800007f|(sum<<7L);
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sum+=1;
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break;
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case 16|MBCS_STATE_VALID_16_PAIR:
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mbcsData->stateTable[state][cell]=entry&0xf800007f|(sum<<7L);
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sum+=2;
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break;
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default:
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/* no addition */
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break;
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}
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}
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}
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/* now, add up the delta offsets for the transitional entries */
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for(cell=0; cell<256; ++cell) {
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entry=mbcsData->stateTable[state][cell];
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if(entry>=0) {
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if(mbcsData->stateFlags[entry&0x7f]&MBCS_STATE_FLAG_READY) {
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mbcsData->stateTable[state][cell]=entry&0xf800007f|(sum<<7L);
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sum+=mbcsData->stateOffsetSum[entry&0x7f];
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} else {
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/* that next state does not have a sum yet, we cannot finish the one for this state */
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sum=0xffffffff;
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break;
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}
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}
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}
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if(sum!=0xffffffff) {
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mbcsData->stateOffsetSum[state]=sum;
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mbcsData->stateFlags[state]|=MBCS_STATE_FLAG_READY;
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}
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}
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}
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}
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if(!allStatesReady) {
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fprintf(stderr, "error: the state table contains loops\n");
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return FALSE;
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}
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/*
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* For all "direct" (i.e., initial) states>0,
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* the offsets need to be increased by the sum of
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* the previous initial states.
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*/
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sum=mbcsData->stateOffsetSum[0];
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for(state=1; state<(int)mbcsData->header.countStates; ++state) {
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if((mbcsData->stateFlags[state]&0xf)==MBCS_STATE_FLAG_DIRECT) {
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uint32_t sum2=sum<<7;
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sum+=mbcsData->stateOffsetSum[state];
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for(cell=0; cell<256; ++cell) {
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entry=mbcsData->stateTable[state][cell];
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if(entry>=0) {
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mbcsData->stateTable[state][cell]=entry+sum2;
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}
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}
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}
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}
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if(VERBOSE) {
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printf("the total number of offsets is 0x%lx=%lu\n", sum, sum);
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}
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/* round up to the next even number to have the following data 32-bit-aligned */
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sum=(sum+1)&~1;
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mbcsData->countToUCodeUnits=sum;
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/* allocate the code unit array and prefill it with "unassigned" values */
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mbcsData->unicodeCodeUnits=(uint16_t *)uprv_malloc(sum*sizeof(uint16_t));
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if(mbcsData->unicodeCodeUnits==NULL) {
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fprintf(stderr, "error: out of memory allocating %ld 16-bit code units\n", sum);
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return FALSE;
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}
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for(i=0; i<sum; ++i) {
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mbcsData->unicodeCodeUnits[i]=0xfffe;
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}
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/* allocate the codepage mappings and preset the first 16 characters to 0 */
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mbcsData->fromUBytes=(uint8_t *)uprv_malloc(0x100000*mbcsData->maxCharLength); /* 1M mappings is the maximum possible */
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if(mbcsData->fromUBytes==NULL) {
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fprintf(stderr, "error: out of memory allocating %ldMB for target mappings\n", mbcsData->maxCharLength);
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return FALSE;
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}
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uprv_memset(mbcsData->fromUBytes, 0, 16*mbcsData->maxCharLength);
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mbcsData->stage2Top=0x80;
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mbcsData->stage3Top=16*mbcsData->maxCharLength;
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return TRUE;
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}
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static UBool
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setFallback(MBCSData *mbcsData, uint32_t offset, UChar32 c) {
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_MBCSToUFallback *toUFallbacks=mbcsData->toUFallbacks;
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uint32_t i, limit;
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/* first, see if there is already a fallback for this offset */
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limit=mbcsData->header.countToUFallbacks;
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/* do a linear search for the fallback mapping (the table is not yet sorted) */
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for(i=0; i<limit; ++i) {
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if(offset==toUFallbacks[i].offset) {
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toUFallbacks[i].codePoint=c;
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return TRUE;
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}
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}
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/* if there is no fallback for this offset, then add one */
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if(limit>=MBCS_MAX_FALLBACK_COUNT) {
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fprintf(stderr, "error: too many toUnicode fallbacks, currently at: U+%lx\n", c);
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return FALSE;
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}
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toUFallbacks[limit].offset=offset;
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toUFallbacks[limit].codePoint=c;
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mbcsData->header.countToUFallbacks=limit+1;
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return TRUE;
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}
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static void
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removeFallback(MBCSData *mbcsData, uint32_t offset) {
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_MBCSToUFallback *toUFallbacks=mbcsData->toUFallbacks;
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uint32_t i, limit;
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/* see if there is a fallback for this offset */
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limit=mbcsData->header.countToUFallbacks;
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/* do a linear search for the fallback mapping (the table is not yet sorted) */
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for(i=0; i<limit; ++i) {
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if(offset==toUFallbacks[limit].offset) {
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/* copy the last fallback entry here to keep the list contiguous */
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toUFallbacks[i].offset=toUFallbacks[limit-1].offset;
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toUFallbacks[i].codePoint=toUFallbacks[limit-1].codePoint;
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mbcsData->header.countToUFallbacks=limit-1;
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return;
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}
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}
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}
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/*
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* isFallback is almost a boolean:
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* 1 (TRUE) this is a fallback mapping
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* 0 (FALSE) this is a precise mapping
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* -1 the precision of this mapping is not specified
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*/
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UBool
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MBCSAddToUnicode(MBCSData *mbcsData,
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const uint8_t *bytes, int32_t length,
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UChar32 c,
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int8_t isFallback) {
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uint32_t offset=0, b=0;
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int32_t i=0, entry;
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uint8_t state=0;
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if(mbcsData->header.countStates==0) {
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fprintf(stderr, "error: there is no state information!\n");
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return FALSE;
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}
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/* put together a 32-bit value for the byte sequence for errors */
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for(i=0; i<length; ++i) {
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b=(b<<8)|bytes[i];
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}
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/*
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* Walk down the state table like in conversion,
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* much like getNextUChar().
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* We assume that c<=0x10ffff.
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*/
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for(i=0;;) {
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entry=mbcsData->stateTable[state][bytes[i++]];
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if(entry>=0) {
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if(i==length) {
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fprintf(stderr, "error: byte sequence too short, ends in non-final state %hu: %lx (U+%lx)\n", state, b, c);
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return FALSE;
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}
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state=(uint8_t)entry&0x7f;
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offset+=entry>>7;
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} else {
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if(i<length) {
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fprintf(stderr, "error: byte sequence too long by %d bytes, final state %hu: %lx (U+%lx)\n", (length-i), state, b, c);
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return FALSE;
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}
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switch((uint32_t)entry>>27U) {
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case 16|MBCS_STATE_ILLEGAL:
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fprintf(stderr, "error: byte sequence ends in illegal state: %lx (U+%lx)\n", b, c);
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return FALSE;
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case 16|MBCS_STATE_CHANGE_ONLY:
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fprintf(stderr, "error: byte sequence ends in state-change-only: %lx (U+%lx)\n", b, c);
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return FALSE;
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case 16|MBCS_STATE_UNASSIGNED:
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|
fprintf(stderr, "error: byte sequence ends in unassigned state: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
case 16|MBCS_STATE_FALLBACK_DIRECT_16:
|
|
case 16|MBCS_STATE_VALID_DIRECT_16:
|
|
case 16|MBCS_STATE_FALLBACK_DIRECT_20:
|
|
case 16|MBCS_STATE_VALID_DIRECT_20:
|
|
if((entry&0x7ffff80)!=0x7fff00) {
|
|
/* the "direct" action's value is not "unassigned" any more */
|
|
if(isFallback>=0 && (uint32_t)entry>>27U>=(16|MBCS_STATE_VALID_DIRECT_16)) {
|
|
/* do not overwrite precise mappings with specified-precision mappings */
|
|
if(isFallback==0) {
|
|
/* precise over precise: error */
|
|
fprintf(stderr, "error: duplicate byte sequence: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
} else {
|
|
/* fallback over precise: ignore */
|
|
if(VERBOSE) {
|
|
fprintf(stderr, "duplicate byte sequence: %lx (U+%lx)\n", b, c);
|
|
}
|
|
return TRUE;
|
|
}
|
|
}
|
|
if(VERBOSE) {
|
|
fprintf(stderr, "duplicate byte sequence: %lx (U+%lx)\n", b, c);
|
|
}
|
|
/*
|
|
* Continue after the above warning
|
|
* if the precision of the mapping is unspecified
|
|
* or a fallback is overriding a previous fallback.
|
|
*/
|
|
}
|
|
/* reassign the correct action code */
|
|
entry=
|
|
entry&0x8000007f|
|
|
(MBCS_STATE_FALLBACK_DIRECT_16+(isFallback>0 ? 0 : 2)+(c>=0x10000 ? 1 : 0))
|
|
<<27;
|
|
/* put the code point into bits 22..7 for BMP, c-0x10000 into 26..7 for others */
|
|
if(c<=0xffff) {
|
|
entry|=c<<7;
|
|
} else {
|
|
entry|=(c-0x10000)<<7;
|
|
}
|
|
mbcsData->stateTable[state][bytes[i-1]]=entry;
|
|
break;
|
|
case 16|MBCS_STATE_VALID_16:
|
|
/* bits 26..16 are not used, 0 */
|
|
/* bits 15..7 contain the final offset delta to one 16-bit code unit */
|
|
offset+=(uint16_t)entry>>7;
|
|
if(isFallback>0) {
|
|
/* assign only if there is no precise mapping */
|
|
if(mbcsData->unicodeCodeUnits[offset]==0xfffe) {
|
|
return setFallback(mbcsData, offset, c);
|
|
}
|
|
} else {
|
|
if(c>=0x10000) {
|
|
fprintf(stderr, "error: code point does not fit into valid-16-bit state: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
}
|
|
if(mbcsData->unicodeCodeUnits[offset]!=0xfffe) {
|
|
if(isFallback==0) {
|
|
fprintf(stderr, "error: duplicate byte sequence: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
}
|
|
if(VERBOSE) {
|
|
fprintf(stderr, "duplicate byte sequence: %lx (U+%lx)\n", b, c);
|
|
}
|
|
/* continue after the above warning if the precision of the mapping is unspecified */
|
|
}
|
|
mbcsData->unicodeCodeUnits[offset]=(uint16_t)c;
|
|
removeFallback(mbcsData, offset);
|
|
}
|
|
break;
|
|
case 16|MBCS_STATE_VALID_16_PAIR:
|
|
/* bits 26..16 are not used, 0 */
|
|
/* bits 15..7 contain the final offset delta to two 16-bit code units */
|
|
offset+=(uint16_t)entry>>7;
|
|
if(isFallback>0) {
|
|
/* assign only if there is no precise mapping */
|
|
if(mbcsData->unicodeCodeUnits[offset]==0xfffe) {
|
|
return setFallback(mbcsData, offset, c);
|
|
}
|
|
} else {
|
|
if(mbcsData->unicodeCodeUnits[offset]!=0xfffe) {
|
|
if(isFallback==0) {
|
|
fprintf(stderr, "error: duplicate byte sequence: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
}
|
|
if(VERBOSE) {
|
|
fprintf(stderr, "duplicate byte sequence: %lx (U+%lx)\n", b, c);
|
|
}
|
|
/* continue after the above warning if the precision of the mapping is unspecified */
|
|
}
|
|
if(c<=0xffff) {
|
|
/* set BMP code point */
|
|
mbcsData->unicodeCodeUnits[offset]=(uint16_t)c;
|
|
} else {
|
|
/* set a surrogate pair */
|
|
mbcsData->unicodeCodeUnits[offset++]=(uint16_t)(0xd7c0+(c>>10));
|
|
mbcsData->unicodeCodeUnits[offset]=(uint16_t)(0xdc00+(c&0x3ff));
|
|
}
|
|
removeFallback(mbcsData, offset);
|
|
}
|
|
break;
|
|
default:
|
|
/* reserved, must never occur */
|
|
fprintf(stderr, "internal error: byte sequence reached reserved action code, entry %lx: %lx (U+%lx)\n", entry, b, c);
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
UBool
|
|
MBCSAddFromUnicode(MBCSData *mbcsData,
|
|
const uint8_t *bytes, int32_t length,
|
|
UChar32 c,
|
|
int8_t isFallback) {
|
|
uint8_t *p;
|
|
uint32_t i, b=0, index;
|
|
|
|
/* put together a 32-bit value for the byte sequence for errors */
|
|
for(i=0; i<(uint32_t)length; ++i) {
|
|
b=(b<<8)|bytes[i];
|
|
}
|
|
|
|
/*
|
|
* Walk down the triple-stage compact array and
|
|
* allocate parts as necessary.
|
|
* Note that stage 2 and 3 blocks 0 are reserved for all-unassigned mappings.
|
|
* We assume that length<=maxCharLength and that c<=0x10ffff.
|
|
*/
|
|
|
|
/* inspect stage 1 */
|
|
index=c>>10;
|
|
if(mbcsData->table[index]==0) {
|
|
/* allocate another block in stage 2 */
|
|
if(mbcsData->stage2Top==2*0xffc0) {
|
|
fprintf(stderr, "error: too many code points: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
}
|
|
/*
|
|
* each block has 64*2 entries:
|
|
* 6 code point bits 9..4 with 1 flags value and 1 stage 3 index
|
|
* stage 1 values are half of the indexes to the stage 2 blocks
|
|
* so that they fit into 16 bits;
|
|
* therefore, stage 1 values increase only by 64 per stage 2 block
|
|
*/
|
|
mbcsData->table[index]=(uint16_t)(mbcsData->stage2Top/2);
|
|
mbcsData->stage2Top+=0x80;
|
|
}
|
|
|
|
/* inspect stage 2 */
|
|
index=0x440+2*((uint32_t)mbcsData->table[index]+((c>>4)&0x3f));
|
|
if(mbcsData->table[index+1]==0) {
|
|
/* allocate another block in stage 3 */
|
|
if(mbcsData->stage3Top+16*mbcsData->maxCharLength>=0x100000) {
|
|
fprintf(stderr, "error: too many code points: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
}
|
|
/* each block has 16*maxCharLength bytes */
|
|
mbcsData->table[index+1]=(uint16_t)((mbcsData->stage3Top/16)/mbcsData->maxCharLength);
|
|
uprv_memset(mbcsData->fromUBytes+mbcsData->stage3Top, 0, 16*mbcsData->maxCharLength);
|
|
mbcsData->stage3Top+=16*mbcsData->maxCharLength;
|
|
}
|
|
|
|
if(isFallback<=0) {
|
|
/* for a precise mapping, make sure that there is no other precise one */
|
|
if((mbcsData->table[index]&(1<<(c&0xf)))!=0) {
|
|
if(isFallback==0) {
|
|
fprintf(stderr, "error: duplicate code point: %lx (U+%lx)\n", b, c);
|
|
return FALSE;
|
|
}
|
|
if(VERBOSE) {
|
|
fprintf(stderr, "duplicate code point: %lx (U+%lx)\n", b, c);
|
|
}
|
|
/* continue after the above warning if the precision of the mapping is unspecified */
|
|
}
|
|
|
|
/* set the "assigned" flag */
|
|
mbcsData->table[index]|=(1<<(c&0xf));
|
|
} else {
|
|
/* do not write a fallback if there is a precise mapping already */
|
|
if((mbcsData->table[index]&(1<<(c&0xf)))!=0) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
/* write the codepage bytes into stage 3 */
|
|
++index;
|
|
p=mbcsData->fromUBytes+(16*(uint32_t)mbcsData->table[index]+(c&0xf))*mbcsData->maxCharLength;
|
|
switch(mbcsData->maxCharLength) {
|
|
case 4:
|
|
*p++=(uint8_t)(b>>24);
|
|
case 3:
|
|
*p++=(uint8_t)(b>>16);
|
|
case 2:
|
|
*p++=(uint8_t)(b>>8);
|
|
case 1:
|
|
*p++=(uint8_t)b;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
compareFallbacks(const void *fb1, const void *fb2) {
|
|
return ((const _MBCSToUFallback *)fb1)->offset-((const _MBCSToUFallback *)fb2)->offset;
|
|
}
|
|
|
|
static UBool
|
|
MBCSTransformEUC(MBCSData *mbcsData) {
|
|
uint8_t *p, *q;
|
|
uint32_t i, oldLength=mbcsData->maxCharLength, old3Top=mbcsData->stage3Top, new3Top;
|
|
uint8_t b;
|
|
|
|
if(oldLength<3) {
|
|
return FALSE;
|
|
}
|
|
|
|
/* test if all first bytes are in {0, 0x8e, 0x8f} */
|
|
p=mbcsData->fromUBytes;
|
|
for(i=0; i<old3Top; i+=oldLength) {
|
|
b=p[i];
|
|
if(b!=0 && b!=0x8e && b!=0x8f) {
|
|
/* some first byte does not fit the EUC pattern, nothing to be done */
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* modify outputType and adjust stage3Top */
|
|
mbcsData->header.flags=MBCS_OUTPUT_3_EUC+oldLength-3;
|
|
mbcsData->stage3Top=new3Top=(old3Top*(oldLength-1))/oldLength;
|
|
|
|
/*
|
|
* EUC-encode all byte sequences;
|
|
* see "CJKV Information Processing" (1st ed. 1999) from Ken Lunde, O'Reilly,
|
|
* p. 161 in chapter 4 "Encoding Methods"
|
|
*/
|
|
q=p;
|
|
for(i=0; i<old3Top; i+=oldLength) {
|
|
b=*p++;
|
|
if(b==0) {
|
|
/* short sequences are stored directly */
|
|
/* code set 0 or 1 */
|
|
*q++=*p++;
|
|
*q++=*p++;
|
|
} else if(b==0x8e) {
|
|
/* code set 2 */
|
|
*q++=*p++&0x7f;
|
|
*q++=*p++;
|
|
} else /* b==0x8f */ {
|
|
/* code set 3 */
|
|
*q++=*p++;
|
|
*q++=*p++&0x7f;
|
|
}
|
|
if(oldLength==4) {
|
|
*q++=*p++;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
MBCSPostprocess(MBCSData *mbcsData) {
|
|
int32_t entry;
|
|
int state, cell;
|
|
|
|
/* this needs to be printed before the EUC transformation because later maxCharLength might not be correct */
|
|
if(VERBOSE) {
|
|
printf("number of codepage characters in 16-blocks: 0x%lx=%lu\n",
|
|
mbcsData->stage3Top/mbcsData->maxCharLength,
|
|
mbcsData->stage3Top/mbcsData->maxCharLength);
|
|
}
|
|
|
|
/* test each state table entry */
|
|
for(state=0; state<(int)mbcsData->header.countStates; ++state) {
|
|
for(cell=0; cell<256; ++cell) {
|
|
entry=mbcsData->stateTable[state][cell];
|
|
/*
|
|
* if the entry is a final one with a "...-direct" action code
|
|
* and the code point is "unassigned" (0xfffe), then change it to
|
|
* the "unassigned" action code with bits 26..7 set to zero.
|
|
*/
|
|
if( ((uint32_t)(((entry&0xf8000000)>>27U)-(16|MBCS_STATE_FALLBACK_DIRECT_16))<=3) &&
|
|
(entry&0x7ffff80)==0x7fff00
|
|
) {
|
|
mbcsData->stateTable[state][cell]=(entry&0x8000007f)|(MBCS_STATE_UNASSIGNED<<27UL);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* sort toUFallbacks */
|
|
if(mbcsData->header.countToUFallbacks>0) {
|
|
qsort(mbcsData->toUFallbacks, mbcsData->header.countToUFallbacks, sizeof(_MBCSToUFallback), compareFallbacks);
|
|
}
|
|
|
|
MBCSTransformEUC(mbcsData);
|
|
}
|
|
|
|
uint32_t
|
|
MBCSWrite(MBCSData *mbcsData, UNewDataMemory *pData) {
|
|
/* fill the header */
|
|
mbcsData->header.offsetToUCodeUnits=
|
|
sizeof(_MBCSHeader)+
|
|
mbcsData->header.countStates*1024+
|
|
mbcsData->header.countToUFallbacks*sizeof(_MBCSToUFallback);
|
|
mbcsData->header.offsetFromUTable=
|
|
mbcsData->header.offsetToUCodeUnits+
|
|
mbcsData->countToUCodeUnits*2;
|
|
mbcsData->header.offsetFromUBytes=
|
|
mbcsData->header.offsetFromUTable+
|
|
(0x440+mbcsData->stage2Top)*2;
|
|
|
|
/* write the MBCS data */
|
|
udata_writeBlock(pData, &mbcsData->header, sizeof(_MBCSHeader));
|
|
udata_writeBlock(pData, mbcsData->stateTable, mbcsData->header.countStates*1024);
|
|
udata_writeBlock(pData, mbcsData->toUFallbacks, mbcsData->header.countToUFallbacks*sizeof(_MBCSToUFallback));
|
|
udata_writeBlock(pData, mbcsData->unicodeCodeUnits, mbcsData->countToUCodeUnits*2);
|
|
udata_writeBlock(pData, mbcsData->table, (0x440+mbcsData->stage2Top)*2);
|
|
udata_writeBlock(pData, mbcsData->fromUBytes, mbcsData->stage3Top);
|
|
|
|
/* return the number of bytes that should have been written */
|
|
return mbcsData->header.offsetFromUBytes+mbcsData->stage3Top;
|
|
}
|
|
|
|
#if 0
|
|
/* test code, uses only this file and genmbcs.h */
|
|
|
|
extern int
|
|
main(int argc, const char *argv[]) {
|
|
MBCSData *mbcsData;
|
|
static uint8_t bytes[4];
|
|
int32_t entry;
|
|
int i, j;
|
|
|
|
/*
|
|
* sample arguments for shift-jis (max 2):
|
|
* 0-7f,81-9f:1,a1-df,e0-ef:1 40-7e,80-fc
|
|
*
|
|
* sample arguments for euc-jp (max 3):
|
|
* 0-7f,8e:2,8f:3,a1-fe:1 a1-fe a1-df a1-fe:1
|
|
*/
|
|
if(argc>=2) {
|
|
mbcsData=MBCSOpen(3);
|
|
|
|
for(i=1; i<argc; ++i) {
|
|
if(!MBCSAddState(mbcsData, argv[i])) {
|
|
return 2;
|
|
}
|
|
}
|
|
MBCSProcessStates(mbcsData);
|
|
|
|
bytes[0]=0x5c;
|
|
MBCSAddToUnicode(mbcsData, bytes, 1, 0xa5, TRUE);
|
|
MBCSAddFromUnicode(mbcsData, bytes, 1, 0xa5, TRUE);
|
|
bytes[0]=0xe2;
|
|
bytes[1]=0xa3;
|
|
MBCSAddToUnicode(mbcsData, bytes, 2, 0x4e00, FALSE);
|
|
MBCSAddFromUnicode(mbcsData, bytes, 2, 0x4e00, FALSE);
|
|
bytes[0]=0x8e;
|
|
bytes[1]=0xdf;
|
|
MBCSAddToUnicode(mbcsData, bytes, 2, 0x3415, FALSE);
|
|
MBCSAddFromUnicode(mbcsData, bytes, 2, 0x3415, FALSE);
|
|
bytes[0]=0x8f;
|
|
bytes[1]=0xbb;
|
|
bytes[2]=0xcc;
|
|
MBCSAddToUnicode(mbcsData, bytes, 3, 0x9876, FALSE);
|
|
MBCSAddFromUnicode(mbcsData, bytes, 3, 0x9876, FALSE);
|
|
|
|
MBCSPostprocess(mbcsData);
|
|
|
|
for(i=0; i<(int)mbcsData->header.countStates; ++i) {
|
|
printf("state=%x: flags=%x\n", i, mbcsData->stateFlags[i]);
|
|
for(j=0; j<256; ++j) {
|
|
entry=mbcsData->stateTable[i][j];
|
|
printf("%2lx %8lx = %u.%x.%5x.%2x\n", j, entry,
|
|
(uint32_t)entry>>31, entry>>27&0xf, entry>>7&0xfffff, entry&0x7f);
|
|
}
|
|
}
|
|
|
|
MBCSClose(mbcsData);
|
|
} else {
|
|
fprintf(stderr, "error: missing state table arguments\n");
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|