+++ /dev/null
-/* Copyright (C) 2006, Index Data ApS
- * See the file LICENSE for details.
- *
- * $Id: nfaxml.c,v 1.11 2006-10-09 14:22:43 heikki Exp $
- */
-
-/**
- * \file nfaxml.c
- * \brief Routines for reading a NFA spec from an XML file
- *
- */
-
-#if YAZ_HAVE_XML2
-
-#include <string.h>
-
-/* #include <libxml/parser.h> */
-#include <libxml/tree.h>
-#include <libxml/xinclude.h>
-
-#include <yaz/nfa.h>
-#include <yaz/nmem.h>
-#include <yaz/yconfig.h>
-#include <yaz/nfa.h>
-#include <yaz/yaz-iconv.h>
-#include <yaz/nfaxml.h>
-#include <yaz/libxml2_error.h>
-
-/** \brief How long strings we are willing to handle here */
-#define MAXDATALEN 200
-
-/** \brief Get content of a node, in utf16, for yaz_nfa */
-static int utf16_content(xmlNodePtr node, yaz_nfa_char *buf, int maxlen,
- const char *filename, int rulenumber)
-{
- int bufidx=0;
- xmlChar *content = xmlNodeGetContent(node);
- xmlChar *cp = content;
- size_t conlen = strlen((char *)content);
- while (*cp && bufidx<maxlen )
- {
- int error;
- size_t no_read;
- int res = yaz_read_UTF8_char(cp, conlen, &no_read, &error);
- if (res == 0) {
- /* should be caught earlier */
- yaz_log(YLOG_FATAL,"Illegal utf-8 sequence "
- "%ld bytes into '%s' in %s, rule %d ",
- (long)(cp-content), content, filename, rulenumber);
- xmlFree(content);
- return -1;
- }
- buf[bufidx++] = res;
- cp += no_read;
- conlen -= no_read;
- }
- buf[bufidx]=0;
- xmlFree(content);
- return bufidx;
-}
-
-static int parse_range(xmlNodePtr node,
- yaz_nfa_char *range_start,
- yaz_nfa_char *range_end,
- const char *filename, int rulenumber )
-{
- xmlChar *content = xmlNodeGetContent(node);
- xmlChar *cp=content;
- size_t conlen = strlen((char *)content);
- size_t no_read;
- int error;
- int res = yaz_read_UTF8_char(cp, conlen, &no_read, &error);
- if ( res != 0 ) {
- *range_start=res;
- cp += no_read;
- conlen -= no_read;
- res = yaz_read_UTF8_char(cp, conlen, &no_read, &error);
- if (res != '-' )
- res = 0;
- }
- if ( res != 0 ) {
- cp += no_read;
- conlen -= no_read;
- res = yaz_read_UTF8_char(cp, conlen, &no_read, &error);
- }
- if ( res != 0) {
- *range_end = res;
- }
- xmlFree(content);
- if (res == 0) {
- yaz_log(YLOG_FATAL,"Illegal range. '%s'. Must be like 'a-z' "
- "'in %s, rule %d ",
- content, filename, rulenumber);
- return 0;
- }
- return 1;
-} /* parserange */
-
-
-/** \brief Parse a fromstring clause */
-static yaz_nfa_state *parse_fromstring(yaz_nfa *nfa,
- xmlNodePtr node, const char *filename, int rulenumber )
-{
- yaz_nfa_char buf[MAXDATALEN];
- yaz_nfa_state *state;
- int bufidx=utf16_content(node, buf, MAXDATALEN, filename, rulenumber);
- if (bufidx<0)
- return 0;
- state=yaz_nfa_add_sequence(nfa, 0, buf, bufidx);
- return state;
-} /* parse_fromstring */
-
-/** \brief Parse a tostring clause */
-static yaz_nfa_converter *parse_tostring(yaz_nfa *nfa,
- xmlNodePtr node, const char *filename, int rulenumber )
-{
- yaz_nfa_char buf[MAXDATALEN];
- yaz_nfa_converter *conv;
- int bufidx=utf16_content(node, buf, MAXDATALEN, filename, rulenumber);
- if (bufidx<0)
- return 0;
- conv=yaz_nfa_create_string_converter(nfa, buf, bufidx);
- return conv;
-} /* parse_tostring */
-
-static yaz_nfa_state * parse_fromrange(yaz_nfa *nfa,
- xmlNodePtr node,
- yaz_nfa_char *from_begin,
- yaz_nfa_char *from_end,
- const char *filename, int rulenumber )
-{
- yaz_nfa_char begin;
- yaz_nfa_char end;
- yaz_nfa_state *state;
- int rc;
- rc=parse_range(node, &begin, &end, filename, rulenumber);
- if (!rc)
- return 0;
- *from_begin=begin;
- *from_end=end; /* save for calculating the to-range */
- state=yaz_nfa_add_range(nfa, 0, begin, end);
- return state;
-} /* parse_fromrange */
-
-static yaz_nfa_converter *parse_torange(yaz_nfa *nfa,
- xmlNodePtr node, yaz_nfa_char from_begin, yaz_nfa_char from_end,
- const char *filename, int rulenumber )
-{
- yaz_nfa_char begin;
- yaz_nfa_char end;
- yaz_nfa_converter *conv;
- int rc;
- rc=parse_range(node, &begin, &end, filename, rulenumber);
- if (!rc)
- return 0;
- if ( from_end - from_begin != end - begin ) {
- yaz_log(YLOG_FATAL,"From-range not as long as to-range: "
- "from=%x-%x to=%x-%x in rule %d in %s",
- from_begin, from_end, begin, end, rulenumber, filename);
- return 0;
- }
- conv=yaz_nfa_create_range_converter(nfa, 0, from_begin, begin);
- return conv;
-} /* parse_torange */
-
-/** \brief Parse one rule from an XML node */
-static int parse_rule(yaz_nfa *nfa, xmlNodePtr rulenode,
- const char *filename, int rulenumber )
-{
- yaz_nfa_state *state=0;
- yaz_nfa_converter *conv=0;
- yaz_nfa_char range_begin=0, range_end=0;
- xmlNodePtr node;
- int clauses=0;
- for (node = rulenode->children; node; node = node->next)
- {
- if (node->type != XML_ELEMENT_NODE)
- continue;
- clauses++;
- if (!strcmp((const char *) node->name, "fromstring"))
- {
- state = parse_fromstring(nfa, node, filename, rulenumber );
- if (!state)
- return 0;
- } else if (!strcmp((const char *) node->name, "tostring"))
- {
- conv = parse_tostring(nfa, node, filename, rulenumber );
- if (!conv)
- return 0;
- } else if (!strcmp((const char *) node->name, "fromrange"))
- {
- state = parse_fromrange(nfa, node,
- &range_begin, &range_end, filename, rulenumber );
- if (!state)
- return 0;
- } else if (!strcmp((const char *) node->name, "torange"))
- {
- conv = parse_torange(nfa, node,
- range_begin, range_end, filename, rulenumber );
- if (!conv)
- return 0;
- } else {
- yaz_log(YLOG_FATAL,"Unknown clause '%s' in %s rule %d",
- node->name, filename,rulenumber);
- return 0;
- }
- } /* for child */
- if (!state) {
- yaz_log(YLOG_FATAL,"No 'from' clause in a rule %d in %s",
- rulenumber,filename);
- return 0;
- }
- if (!conv) {
- yaz_log(YLOG_FATAL,"No 'to' clause in a rule %d in %s",
- rulenumber,filename);
- return 0;
- }
- if (clauses != 2) {
- yaz_log(YLOG_FATAL,"Must have exactly one 'from' and one 'to' clause "
- "in rule %d in %s", rulenumber,filename);
- return 0;
- }
- if ( YAZ_NFA_SUCCESS == yaz_nfa_set_result(nfa,state,conv))
- return 1;
- yaz_log(YLOG_FATAL,"Conflicting rules in %s rule %d",
- filename, rulenumber);
- return 0;
-} /* parse_rule */
-
-
-/** \brief Parse the NFA from a XML document
- */
-yaz_nfa *yaz_nfa_parse_xml_doc(xmlDocPtr doc, const char *filename)
-{
- xmlNodePtr node;
- yaz_nfa *nfa;
- int rulenumber=0;
-
- if (!doc)
- return 0;
- libxml2_error_to_yazlog(YLOG_FATAL, "yaz_nfa_parse_doc");
- node = xmlDocGetRootElement(doc);
- if (!node || node->type != XML_ELEMENT_NODE ||
- strcmp((const char *) node->name, "ruleset"))
- {
- yaz_log(YLOG_FATAL,"nfa_parse_xml: Could not find root element 'ruleset' "
- "in %s", filename);
- return 0;
- }
- nfa= yaz_nfa_init();
- if (!nfa)
- {
- yaz_log(YLOG_FATAL,"nfa_parse_xml: Creating nfa failed, can't parse %s",
- filename);
- return 0;
- }
-
- for (node = node->children; node; node = node->next)
- {
- if (node->type != XML_ELEMENT_NODE)
- continue;
- if (!strcmp((const char *) node->name, "rule")) {
- if (!parse_rule(nfa,node,filename,rulenumber++))
- return 0;
- } else {
- yaz_log(YLOG_FATAL,"nfa_parse_xml: "
- "expected 'rule', found '%s' in %s",
- (const char *) node->name,filename);
- return 0;
- }
- } /* for */
- return nfa;
-} /* yaz_nfa_parse_xml_doc */
-
-
-/** \brief Parse the NFA from a file
- */
-yaz_nfa *yaz_nfa_parse_xml_file(const char *filepath)
-{
- int nSubst;
- xmlDocPtr doc;
- if (!filepath)
- {
- yaz_log(YLOG_FATAL,"yaz_nfa_parse_xml_file called with NULL");
- return 0;
- }
- libxml2_error_to_yazlog(YLOG_FATAL, "yaz_nfa_parse_xml_file");
-
- doc = xmlParseFile(filepath);
- if (!doc) {
- return 0;
- }
- nSubst=xmlXIncludeProcess(doc);
- if (nSubst==-1) {
- return 0;
- }
- return yaz_nfa_parse_xml_doc(doc, filepath);
-}
-
-/** \brief Parse the NFA from a memory buffer
- */
-yaz_nfa *yaz_nfa_parse_xml_memory(const char *xmlbuff, const char *filename) {
- xmlDocPtr doc;
- if (!xmlbuff)
- {
- yaz_log(YLOG_FATAL,"yaz_nfa_parse_memroy called with NULL");
- return 0;
- }
- libxml2_error_to_yazlog(YLOG_FATAL, "yaz_nfa_parse_xml_memory");
- doc = xmlParseMemory(xmlbuff, strlen(xmlbuff));
- return yaz_nfa_parse_xml_doc(doc,filename);
-}
-
-
-
-#endif /* YAZ_HAVE_XML2 */
-
-
-/*
- * Local variables:
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- * vim: shiftwidth=4 tabstop=8 expandtab
- */
projects / yaz-moved-to-github.git / blobdiff