+++ /dev/null
-/*
- * Copyright (c) 1995-2000, Index Data.
- * See the file LICENSE for details.
- *
- * d1_if.c : A simple interface for extracting strings from data1_node
- * tree structures
- *
- * $Log: d1_if.c,v $
- * Revision 1.5 2000-02-10 13:42:43 adam
- * Removed C++ comment.
- *
- * Revision 1.4 2000/01/06 14:30:56 adam
- * Minor change - to prevent warnings.
- *
- * Revision 1.3 2000/01/06 11:27:02 adam
- * Minor fix so that this source compiles using Visual C++.
- *
- * Revision 1.2 2000/01/04 17:46:17 ian
- * Added function to count occurences of a tag spec in a data1 tree.
- *
- * Revision 1.1 1999/12/21 14:16:19 ian
- * Changed retrieval module to allow data1 trees with no associated absyn.
- * Also added a simple interface for extracting values from data1 trees using
- * a string based tagpath.
- *
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <yaz/data1.h>
-#include <yaz/log.h>
-
-#include <string.h>
-
-
-/*
- * Search for a token in the supplied string up to the supplied list of stop characters or EOL
- * At the end, return the character causing the break and fill pTokenBuffer with the token string so far
- * After the scan, *pPosInBuffer will point to the next character after the one causing the break and
- * pTokenBuffer will contain the actual token
- */
-char data1_ScanNextToken(char* pBuffer,
- char** pPosInBuffer,
- char* pBreakChars,
- char* pWhitespaceChars,
- char* pTokenBuffer)
-{
- char* pBuff = pTokenBuffer;
- *pBuff = '\0';
-
- while ( **pPosInBuffer )
- {
- if ( strchr(pBreakChars,**pPosInBuffer) != NULL )
- {
- /* Current character is a break character */
- *pBuff++ = '\0';
- return *((*pPosInBuffer)++);
- }
- else
- {
- if ( strchr(pWhitespaceChars, **pPosInBuffer) != NULL )
- (*pPosInBuffer)++;
- else
- *pBuff++ = *((*pPosInBuffer)++);
- }
- }
-
- *pBuff++ = *((*pPosInBuffer)++);
- return(**pPosInBuffer);
-}
-
-/*
- * Attempt to find a string value given the specified tagpath
- *
- * Need to make this safe by passing in a buffer.....
- *
- */
-char *data1_getNodeValue(data1_node* node, char* pTagPath)
-{
- data1_node* n = NULL;
-
- n = data1_LookupNode(node, pTagPath );
-
- if ( n )
- {
- /* n should be a tag node with some data under it.... */
- if ( n->child )
- {
- if ( n->child->which == DATA1N_data )
- {
- return n->child->u.data.data;
- }
- else
- {
- yaz_log(LOG_WARN,"Attempting to lookup data for tagpath: Child node is not a data node");
- }
- }
- else
- {
- yaz_log(LOG_WARN,"Found a node matching the tagpath, but it has no child data nodes");
- }
- }
- else
- {
- yaz_log(LOG_WARN,"Unable to lookup a node on the specified tag path");
- }
-
- return "";
-}
-
-
-/* Max length of a tag */
-#define MAX_TAG_SIZE 50
-
-/*
- * data1_LookupNode : Try and find a node as specified by a tagpath
- */
-data1_node *data1_LookupNode(data1_node* node, char* pTagPath)
-{
- /* Node matching the pattern in the tagpath */
- data1_node* matched_node = NULL;
-
- /* Current Child node as we search for nodes matching the pattern in the tagpath */
- data1_node* current_child = node->child;
-
- /* Current position in string */
- char* pCurrCharInPath = pTagPath;
-
- /* Work buffer */
- char Buffer[MAX_TAG_SIZE];
-
- /* The tag type of this node */
- int iTagType = 0;
-
- /* for non string tags, the tag value */
- int iTagValue = 0;
-
- /* for string tags, the tag value */
- char StringTagVal[MAX_TAG_SIZE];
-
- /* Which occurence of that tag under this node */
- int iOccurences=0;
-
- /* Character causing a break */
- char sepchr = '\0';
- Buffer[0] = '\0';
- StringTagVal[0] = '\0';
-
- sepchr = data1_ScanNextToken(pTagPath, &pCurrCharInPath, ",[(."," ", Buffer);
-
- if ( sepchr == '[' )
- {
- /* Next component in node value is [ TagType, TagVal, TagOccurence ] */
- sepchr = data1_ScanNextToken(pTagPath, &pCurrCharInPath, ","," ", Buffer);
- iTagType = atoi(Buffer);
-
- /* Occurence is optional... */
- sepchr = data1_ScanNextToken(pTagPath, &pCurrCharInPath, ",]."," ", Buffer);
-
- if ( iTagType == 3 )
- strcpy(StringTagVal,Buffer);
- else
- iTagValue = atoi(Buffer);
-
- /* If sepchar was a ',' there should be an instance */
- if ( sepchr == ',' )
- {
- sepchr = data1_ScanNextToken(pTagPath, &pCurrCharInPath, "]."," ", Buffer);
- iOccurences = atoi(Buffer);
- }
-
- if ( sepchr == ']' )
- {
- /* See if we can scan the . for the next component or the end of the line... */
- sepchr = data1_ScanNextToken(pTagPath, &pCurrCharInPath, "."," ", Buffer);
- }
- else
- {
- yaz_log(LOG_FATAL,"Node does not end with a ]");
- /* Fatal Error */
- return(NULL);
- }
- }
- else
- {
- /* We have a TagName so Read up to ( or . or EOL */
- iTagType = 3;
- strcpy(StringTagVal,Buffer);
-
- if ( sepchr == '(' )
- {
- /* Read the occurence */
- sepchr = data1_ScanNextToken(pTagPath, &pCurrCharInPath, ")"," ", Buffer);
- iOccurences = atoi(Buffer);
-
- /* See if we can find the . at the end of this clause */
- sepchr = data1_ScanNextToken(pTagPath, &pCurrCharInPath, "."," ", Buffer);
- }
-
- }
-
- yaz_log(LOG_DEBUG,"search node for child like [%d,%d,%s,%d]",iTagType,iTagValue,StringTagVal,iOccurences);
-
-
- /* OK.. We have extracted tagtype, Value and Occurence, see if we can find a node */
- /* Under the current parent matching that description */
-
- while ( ( current_child ) && ( matched_node == NULL ) )
- {
- if ( current_child->which == DATA1N_tag )
- {
- if ( iTagType == 3 )
- {
- if ( ( current_child->u.tag.element == NULL ) &&
- ( strcmp(current_child->u.tag.tag, StringTagVal) == 0 ) )
- {
- if ( iOccurences )
- {
- /* Everything matched, but not yet found the
- right occurence of the given tag */
- iOccurences--;
- }
- else
- {
- /* We have matched a string tag... Is there more to
- process? */
- matched_node = current_child;
- }
- }
- }
- else /* Attempt to match real element */
- {
- yaz_log(LOG_WARN,"Non string tag matching not yet implemented");
- }
- }
- current_child = current_child->next;
- }
-
-
- /* If there is more... Continue */
- if ( ( sepchr == '.' ) && ( matched_node ) )
- {
- return data1_LookupNode(matched_node, pCurrCharInPath);
- }
- else
- {
- return matched_node;
- }
-}
-
-/**
-
-data1_CountOccurences
-
-Count the number of occurences of the last instance on a tagpath.
-
-@param data1_node* node : The root of the tree we wish to look for occurences in
-@param const char* pTagPath : The tagpath we want to count the occurences of...
-
-*/
-int data1_CountOccurences(data1_node* node, char* pTagPath)
-{
- int iRetVal = 0;
- data1_node* n = NULL;
- data1_node* pParent = NULL;
-
- n = data1_LookupNode(node, pTagPath );
-
-
- if ( ( n ) &&
- ( n->which == DATA1N_tag ) &&
- ( n->parent ) )
- {
- data1_node* current_child;
- pParent = n->parent;
-
- for ( current_child = pParent->child;
- current_child;
- current_child = current_child->next )
- {
- if ( current_child->which == DATA1N_tag )
- {
- if ( current_child->u.tag.element == NULL )
- {
- if ( ( n->u.tag.tag ) &&
- ( current_child->u.tag.tag ) &&
- ( strcmp(current_child->u.tag.tag, n->u.tag.tag) == 0 ) )
- {
- iRetVal++;
- }
- }
- else if ( current_child->u.tag.element == n->u.tag.element )
- {
- /* Hmmm... Is the above right for non string tags???? */
- iRetVal++;
- }
- }
- }
- }
-
- return iRetVal;
-}
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