364 lines
11 KiB
C
364 lines
11 KiB
C
/*
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*******************************************************************************
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* *
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* COPYRIGHT: *
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* (C) Copyright International Business Machines Corporation, 1998, 1999 *
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* Licensed Material - Program-Property of IBM - All Rights Reserved. *
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* US Government Users Restricted Rights - Use, duplication, or disclosure *
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* restricted by GSA ADP Schedule Contract with IBM Corp. *
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* *
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*******************************************************************************
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*
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* File parse.c
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*
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* Modification History:
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*
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* Date Name Description
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* 05/26/99 stephen Creation.
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*******************************************************************************
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*/
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#include "parse.h"
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#include "error.h"
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#include "uhash.h"
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#include "cmemory.h"
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#include "read.h"
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#include "ufile.h"
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#include "ustdio.h"
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#include "ustr.h"
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#include "list.h"
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#include "rblist.h"
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/* Node IDs for the state transition table. */
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enum ENode {
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eError,
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eInitial, /* Next: Locale name */
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eGotLoc, /* Next: { */
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eIdle, /* Next: Tag name | } */
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eGotTag, /* Next: { */
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eNode5, /* Next: Data | Subtag */
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eNode6, /* Next: } | { | , */
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eList, /* Next: List data */
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eNode8, /* Next: , */
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eTagList, /* Next: Subtag data */
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eNode10, /* Next: } */
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eNode11, /* Next: Subtag */
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eNode12, /* Next: { */
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e2dArray, /* Next: Data | } */
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eNode14, /* Next: , | } */
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eNode15, /* Next: , | } */
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eNode16 /* Next: { | } */
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};
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/* Action codes for the state transtiion table. */
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enum EAction {
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/* Generic actions */
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eNOP = 0x0100, /* Do nothing */
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eOpen = 0x0200, /* Open a new locale data block with the data
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string as the locale name */
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eClose = 0x0300, /* Close a locale data block */
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eSetTag = 0x0400, /* Record the last string as the tag name */
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/* Comma-delimited lists */
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eBegList = 0x1100, /* Start a new string list with the last string
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as the first element */
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eEndList = 0x1200, /* Close a string list being built */
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eListStr = 0x1300, /* Record the last string as a data string and
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increment the index */
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eStr = 0x1400, /* Record the last string as a singleton string */
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/* 2-d lists */
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eBeg2dList = 0x2100, /* Start a new 2d string list with no elements as yet */
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eEnd2dList = 0x2200, /* Close a 2d string list being built */
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e2dStr = 0x2300, /* Record the last string as a 2d string */
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eNewRow = 0x2400, /* Start a new row */
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/* Tagged lists */
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eBegTagged = 0x3100, /* Start a new tagged list with the last
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string as the first subtag */
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eEndTagged = 0x3200, /* Close a tagged list being build */
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eSubtag = 0x3300, /* Record the last string as the subtag */
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eTaggedStr = 0x3400 /* Record the last string as a tagged string */
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};
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/* A struct which encapsulates a node ID and an action. */
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struct STransition {
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enum ENode fNext;
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enum EAction fAction;
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};
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/* This table describes an ATM (state machine) which parses resource
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bundle text files rather strictly. Each row represents a node. The
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columns of that row represent transitions into other nodes. Most
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transitions are "eError" because most transitions are
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disallowed. For example, if the parser has just seen a tag name, it
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enters node 4 ("eGotTag"). The state table then marks only one
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valid transition, which is into node 5, upon seeing an eOpenBrace
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token. We allow an extra comma after the last element in a
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comma-delimited list (transition from eList to eIdle on
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kCloseBrace). */
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static struct STransition gTransitionTable [] = {
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/* kString kOpenBrace kCloseBrace kComma*/
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{eError,eNOP}, {eError,eNOP}, {eError,eNOP}, {eError,eNOP},
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{eGotLoc,eOpen}, {eError,eNOP}, {eError,eNOP}, {eError,eNOP},
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{eError,eNOP}, {eIdle,eNOP}, {eError,eNOP}, {eError,eNOP},
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{eGotTag,eSetTag}, {eError,eNOP}, {eInitial,eClose}, {eError,eNOP},
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{eError,eNOP}, {eNode5,eNOP}, {eError,eNOP}, {eError,eNOP},
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{eNode6,eNOP}, {e2dArray,eBeg2dList},{eError,eNOP}, {eError,eNOP},
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{eError,eNOP}, {eTagList,eBegTagged},{eIdle,eStr}, {eList,eBegList},
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{eNode8,eListStr}, {eError,eNOP}, {eIdle,eEndList}, {eError,eNOP},
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{eError,eNOP}, {eError,eNOP}, {eIdle,eEndList}, {eList,eNOP},
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{eNode10,eTaggedStr},{eError,eNOP}, {eError,eNOP}, {eError,eNOP},
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{eError,eNOP}, {eError,eNOP}, {eNode11,eNOP}, {eError,eNOP},
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{eNode12,eNOP}, {eError,eNOP}, {eIdle,eEndTagged},{eError,eNOP},
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{eError,eNOP}, {eTagList,eSubtag}, {eError,eNOP}, {eError,eNOP},
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{eNode14,e2dStr}, {eError,eNOP}, {eNode15,eNOP}, {eError,eNOP},
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{eError,eNOP}, {eError,eNOP}, {eNode15,eNOP}, {e2dArray,eNOP},
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{eError,eNOP}, {e2dArray,eNewRow}, {eIdle,eEnd2dList},{eNode16,eNOP},
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{eError,eNOP}, {e2dArray,eNewRow}, {eIdle,eEnd2dList},{eError,eNOP}
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};
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/* Row length is 4 */
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#define GETTRANSITION(row,col) (gTransitionTable[col + (row<<2)])
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struct SRBItemList*
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parse(FileStream *f,
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UErrorCode *status)
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{
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struct UFILE *file;
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enum ETokenType type;
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enum ENode node;
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struct STransition t;
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struct UString token;
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struct UString tag;
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struct UString subtag;
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struct UString localeName;
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struct UString keyname;
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struct SRBItem *item;
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struct SRBItemList *list;
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struct SList *current;
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/* Hashtable for keeping track of seen tag names */
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struct UHashtable *data;
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if(FAILURE(*status)) return 0;
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/* setup */
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ustr_init(&token);
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ustr_init(&tag);
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ustr_init(&subtag);
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ustr_init(&localeName);
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ustr_init(&keyname);
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node = eInitial;
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data = 0;
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current = 0;
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item = 0;
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file = u_finit(f, status);
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list = rblist_open(status);
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if(FAILURE(*status)) goto finish;
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/* iterate through the stream */
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for(;;) {
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/* get next token from stream */
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type = getNextToken(file, &token, status);
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if(FAILURE(*status)) goto finish;
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switch(type) {
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case tok_EOF:
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*status = (node == eInitial) ? U_ZERO_ERROR : U_INVALID_FORMAT_ERROR;
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setErrorText("Unexpected EOF encountered");
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goto finish;
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/*break;*/
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case tok_error:
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*status = U_INVALID_FORMAT_ERROR;
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goto finish;
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/*break;*/
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default:
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break;
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}
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t = GETTRANSITION(node, type);
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node = t.fNext;
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if(node == eError) {
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*status = U_INVALID_FORMAT_ERROR;
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goto finish;
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}
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switch(t.fAction) {
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case eNOP:
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break;
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/* Record the last string as the tag name */
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case eSetTag:
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ustr_cpy(&tag, &token, status);
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if(FAILURE(*status)) goto finish;
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if(uhash_get(data, uhash_hashUString(tag.fChars)) != 0) {
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*status = U_INVALID_FORMAT_ERROR;
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setErrorText("Duplicate tag name detected");
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goto finish;
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}
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break;
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/* Record a singleton string */
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case eStr:
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if(current != 0) {
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*status = U_INTERNAL_PROGRAM_ERROR;
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goto finish;
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}
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current = strlist_open(status);
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strlist_add(current, token.fChars, status);
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item = make_rbitem(tag.fChars, current, status);
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rblist_add(list, item, status);
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uhash_put(data, tag.fChars, status);
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if(FAILURE(*status)) goto finish;
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current = 0;
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item = 0;
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break;
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/* Begin a string list */
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case eBegList:
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if(current != 0) {
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*status = U_INTERNAL_PROGRAM_ERROR;
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goto finish;
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}
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current = strlist_open(status);
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strlist_add(current, token.fChars, status);
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if(FAILURE(*status)) goto finish;
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break;
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/* Record a comma-delimited list string */
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case eListStr:
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strlist_add(current, token.fChars, status);
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if(FAILURE(*status)) goto finish;
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break;
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/* End a string list */
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case eEndList:
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uhash_put(data, tag.fChars, status);
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item = make_rbitem(tag.fChars, current, status);
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rblist_add(list, item, status);
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if(FAILURE(*status)) goto finish;
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current = 0;
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item = 0;
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break;
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case eBeg2dList:
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if(current != 0) {
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*status = U_INTERNAL_PROGRAM_ERROR;
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goto finish;
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}
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current = strlist2d_open(status);
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if(FAILURE(*status)) goto finish;
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break;
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case eEnd2dList:
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uhash_put(data, tag.fChars, status);
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item = make_rbitem(tag.fChars, current, status);
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rblist_add(list, item, status);
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if(FAILURE(*status)) goto finish;
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current = 0;
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item = 0;
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break;
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case e2dStr:
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strlist2d_add(current, token.fChars, status);
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if(FAILURE(*status)) goto finish;
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break;
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case eNewRow:
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strlist2d_newRow(current, status);
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if(FAILURE(*status)) goto finish;
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break;
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case eBegTagged:
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if(current != 0) {
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*status = U_INTERNAL_PROGRAM_ERROR;
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goto finish;
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}
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current = taglist_open(status);
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ustr_cpy(&subtag, &token, status);
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if(FAILURE(*status)) goto finish;
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break;
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case eEndTagged:
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uhash_put(data, tag.fChars, status);
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item = make_rbitem(tag.fChars, current, status);
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rblist_add(list, item, status);
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if(FAILURE(*status)) goto finish;
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current = 0;
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item = 0;
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break;
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case eTaggedStr:
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taglist_add(current, subtag.fChars, token.fChars, status);
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if(FAILURE(*status)) goto finish;
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break;
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/* Record the last string as the subtag */
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case eSubtag:
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ustr_cpy(&subtag, &token, status);
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if(FAILURE(*status)) goto finish;
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if(taglist_get(current, subtag.fChars, status) != 0) {
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*status = U_INVALID_FORMAT_ERROR;
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setErrorText("Duplicate subtag found in tagged list");
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goto finish;
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}
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break;
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case eOpen:
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if(data != 0) {
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*status = U_INTERNAL_PROGRAM_ERROR;
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goto finish;
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}
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ustr_cpy(&localeName, &token, status);
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rblist_setlocale(list, localeName.fChars, status);
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if(FAILURE(*status)) goto finish;
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data = uhash_open(uhash_hashUString, status);
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break;
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case eClose:
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if(data == 0) {
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*status = U_INTERNAL_PROGRAM_ERROR;
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goto finish;
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}
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break;
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}
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}
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finish:
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/* clean up */
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if(data != 0)
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uhash_close(data);
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if(item != 0)
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icu_free(item);
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ustr_deinit(&token);
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ustr_deinit(&tag);
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ustr_deinit(&subtag);
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ustr_deinit(&localeName);
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ustr_deinit(&keyname);
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if(file != 0)
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u_fclose(file);
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return list;
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}
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