283 lines
8.4 KiB
C
283 lines
8.4 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2003, 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: ucm.h
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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: 2003jun20
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* created by: Markus W. Scherer
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*
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* Definitions for the .ucm file parser and handler module ucm.c.
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*/
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#ifndef __UCM_H__
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#define __UCM_H__
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#include "unicode/utypes.h"
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#include "ucnvmbcs.h"
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#include "ucnv_ext.h"
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#include "filestrm.h"
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#include <stdio.h>
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U_CDECL_BEGIN
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/*
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* Per-mapping data structure
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*
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* u if uLen==1: Unicode code point
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* else index to uLen code points
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* b if bLen<=4: up to 4 bytes
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* else index to bLen bytes
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* uLen number of code points
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* bLen number of words containing left-justified bytes
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* bIsMultipleChars indicates that the bytes contain more than one sequence
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* according to the state table
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* f flag for roundtrip (0), fallback (1), sub mapping (2), reverse fallback (3)
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* same values as in the source file after |
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*/
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typedef struct UCMapping {
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UChar32 u;
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union {
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uint32_t index;
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uint8_t bytes[4];
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} b;
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int8_t uLen, bLen, f, moveFlag;
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} UCMapping;
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enum {
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UCM_FLAGS_INITIAL, /* no mappings parsed yet */
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UCM_FLAGS_EXPLICIT, /* .ucm file has mappings with | fallback indicators */
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UCM_FLAGS_IMPLICIT, /* .ucm file has mappings without | fallback indicators, later wins */
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UCM_FLAGS_MIXED /* both implicit and explicit */
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};
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typedef struct UCMTable {
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UCMapping *mappings;
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int32_t mappingsCapacity, mappingsLength;
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UChar32 *codePoints;
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int32_t codePointsCapacity, codePointsLength;
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uint8_t *bytes;
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int32_t bytesCapacity, bytesLength;
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/* index map for mapping by bytes first */
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int32_t *reverseMap;
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uint8_t unicodeMask;
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int8_t flagsType; /* UCM_FLAGS_INITIAL etc. */
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UBool isSorted;
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} UCMTable;
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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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typedef struct UCMStates {
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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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int32_t countStates, minCharLength, maxCharLength, countToUCodeUnits;
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int8_t conversionType, outputType;
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} UCMStates;
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typedef struct UCMFile {
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UCMTable *base, *ext;
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UCMStates states;
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char baseName[UCNV_MAX_CONVERTER_NAME_LENGTH];
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} UCMFile;
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/* simple accesses ---------------------------------------------------------- */
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#define UCM_GET_CODE_POINTS(t, m) \
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(((m)->uLen==1) ? &(m)->u : (t)->codePoints+(m)->u)
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#define UCM_GET_BYTES(t, m) \
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(((m)->bLen<=4) ? (m)->b.bytes : (t)->bytes+(m)->b.index)
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/* APIs --------------------------------------------------------------------- */
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U_CAPI UCMFile * U_EXPORT2
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ucm_open(void);
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U_CAPI void U_EXPORT2
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ucm_close(UCMFile *ucm);
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U_CAPI UBool U_EXPORT2
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ucm_parseHeaderLine(UCMFile *ucm,
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char *line, char **pKey, char **pValue);
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/* @return -1 illegal bytes 0 suitable for base table 1 needs to go into extension table */
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U_CAPI int32_t U_EXPORT2
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ucm_mappingType(UCMStates *baseStates,
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UCMapping *m,
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UChar32 codePoints[UCNV_EXT_MAX_UCHARS],
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uint8_t bytes[UCNV_EXT_MAX_BYTES]);
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/* add a mapping to the base or extension table as appropriate */
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U_CAPI UBool U_EXPORT2
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ucm_addMappingAuto(UCMFile *ucm, UBool forBase, UCMStates *baseStates,
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UCMapping *m,
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UChar32 codePoints[UCNV_EXT_MAX_UCHARS],
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uint8_t bytes[UCNV_EXT_MAX_BYTES]);
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U_CAPI UBool U_EXPORT2
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ucm_addMappingFromLine(UCMFile *ucm, const char *line, UBool forBase, UCMStates *baseStates);
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U_CAPI UCMTable * U_EXPORT2
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ucm_openTable(void);
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U_CAPI void U_EXPORT2
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ucm_closeTable(UCMTable *table);
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U_CAPI void U_EXPORT2
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ucm_resetTable(UCMTable *table);
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U_CAPI void U_EXPORT2
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ucm_sortTable(UCMTable *t);
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/**
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* Read a table from a .ucm file, from after the CHARMAP line to
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* including the END CHARMAP line.
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*/
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U_CAPI void U_EXPORT2
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ucm_readTable(UCMFile *ucm, FileStream* convFile,
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UBool forBase, UCMStates *baseStates,
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UErrorCode *pErrorCode);
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/**
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* Check the validity of mappings against a base table's states;
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* necessary for extension-only tables that were read before their base tables.
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*/
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U_CAPI UBool U_EXPORT2
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ucm_checkValidity(UCMTable *ext, UCMStates *baseStates);
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/**
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* Check a base table against an extension table.
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* Set the moveTarget!=NULL if it is possible to move mappings from the base.
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* This is the case where base and extension tables are parsed from a single file
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* (moveTarget==ext)
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* or when delta file mappings are subtracted from a base table.
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*
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* When a base table cannot be modified because a delta file is parsed in makeconv,
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* then set moveTarget=NULL.
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*
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* if(intersectBase) then mappings that exist in the base table but not in
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* the extension table are moved to moveTarget instead of showing an error.
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*
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* Special mode:
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* If intersectBase==2 for a DBCS extension table, then SBCS mappings are
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* not moved out of the base unless their Unicode input requires it.
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* This helps ucmkbase generate base tables for DBCS-only extension .cnv files.
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*
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* For both tables in the same file, the extension table is automatically
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* built.
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* For separate files, the extension file can use a complete mapping table,
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* so that common mappings need not be stripped out manually.
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*
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*
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* Sort both tables, and then for each mapping direction:
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*
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* If intersectBase is TRUE and the base table contains a mapping
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* that does not exist in the extension table, then this mapping is moved
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* to moveTarget.
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*
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* - otherwise -
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*
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* If the base table contains a mapping for which the input sequence is
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* the same as the extension input, then
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* - if the output is the same: remove the extension mapping
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* - else: error
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*
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* If the base table contains a mapping for which the input sequence is
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* a prefix of the extension input, then
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* - if moveTarget!=NULL: move the base mapping to the moveTarget table
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* - else: error
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*
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* @return FALSE in case of an irreparable error
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*/
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U_CAPI UBool U_EXPORT2
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ucm_checkBaseExt(UCMStates *baseStates, UCMTable *base, UCMTable *ext,
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UCMTable *moveTarget, UBool intersectBase);
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U_CAPI void U_EXPORT2
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ucm_printTable(UCMTable *table, FILE *f, UBool byUnicode);
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U_CAPI void U_EXPORT2
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ucm_printMapping(UCMTable *table, UCMapping *m, FILE *f);
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U_CAPI void U_EXPORT2
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ucm_addState(UCMStates *states, const char *s);
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U_CAPI void U_EXPORT2
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ucm_processStates(UCMStates *states);
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U_CAPI int32_t U_EXPORT2
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ucm_countChars(UCMStates *states,
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const uint8_t *bytes, int32_t length);
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U_CAPI int8_t U_EXPORT2
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ucm_parseBytes(uint8_t bytes[UCNV_EXT_MAX_BYTES], const char *line, const char **ps);
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U_CAPI UBool U_EXPORT2
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ucm_parseMappingLine(UCMapping *m,
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UChar32 codePoints[UCNV_EXT_MAX_UCHARS],
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uint8_t bytes[UCNV_EXT_MAX_BYTES],
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const char *line);
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U_CAPI void U_EXPORT2
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ucm_addMapping(UCMTable *table,
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UCMapping *m,
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UChar32 codePoints[UCNV_EXT_MAX_UCHARS],
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uint8_t bytes[UCNV_EXT_MAX_BYTES]);
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/* very makeconv-specific functions ----------------------------------------- */
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/* finalize and optimize states after the toUnicode mappings are processed */
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U_CAPI void U_EXPORT2
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ucm_optimizeStates(UCMStates *states,
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uint16_t **pUnicodeCodeUnits,
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_MBCSToUFallback *toUFallbacks, int32_t countToUFallbacks,
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UBool verbose);
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/* moved here because it is used inside ucmstate.c */
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U_CAPI int32_t U_EXPORT2
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ucm_findFallback(_MBCSToUFallback *toUFallbacks, int32_t countToUFallbacks,
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uint32_t offset);
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/* very rptp2ucm-specific functions ----------------------------------------- */
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/*
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* Input: Separate tables with mappings from/to Unicode,
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* subchar and subchar1 (0 if none).
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* All mappings must have flag 0.
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*
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* Output: fromUTable will contain the union of mappings with the correct
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* precision flags, and be sorted.
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*/
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U_CAPI void U_EXPORT2
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ucm_mergeTables(UCMTable *fromUTable, UCMTable *toUTable,
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const uint8_t *subchar, int32_t subcharLength,
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uint8_t subchar1);
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U_CAPI UBool U_EXPORT2
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ucm_separateMappings(UCMFile *ucm, UBool isSISO);
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U_CDECL_END
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#endif
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