зеркало из https://github.com/mozilla/pjs.git
436 строки
12 KiB
C
436 строки
12 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#include "rdf-int.h"
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char* error_string = NULL;
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int lineNumber = 0;
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void
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main (int argc, char* argv[]) {
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RDFFile rf = initFileStruct();
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int ok = 1;
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error_string = getMem(1000);
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if (argc == 2) {
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FILE* f = fopen(argv[1], "r");
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if (f != NULL) {
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char* buff = getMem(RDF_BUF_SIZE);
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int len;
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while (ok && ((len = fread(buff, 1, RDF_BUF_SIZE-1, f)) > 0)) {
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buff[len] = '\0';
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ok = parseNextRDFXMLBlobInt(rf, buff, strlen(buff));
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memset(buff, '\0', RDF_BUF_SIZE);
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}
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}
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if (ok) {
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while (1) {
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char* nextQuery = getMem(200);
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int n;
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nextQuery = gets(nextQuery);
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if (nextQuery) {
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char** ans = processRDFQuery(nextQuery);
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if (ans) {
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for (n = 0; ans[n] != NULL; n++) {
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printf("%s\n", ans[n]);
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}
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}
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} else {
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break;
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}
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}
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}
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}
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}
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void
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RDF_Init () {
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error_string = getMem(1000);
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}
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int
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RDF_DigestNewStuff (char* fileName, char* data, int len) {
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RDFFile rf = initFileStruct();
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int ok = 1;
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ok = parseNextRDFXMLBlobInt(rf, data, len);
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freeMem(rf->line);
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freeMem(rf->holdOver);
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return ok;
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}
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RDFFile
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initFileStruct (void) {
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RDFFile ans = (RDFFile)getMem(sizeof(RDF_FileStruct));
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ans->line = (char*)getMem(RDF_BUF_SIZE);
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ans->holdOver = (char*)getMem(RDF_BUF_SIZE);
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ans->depth = 1;
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ans->lastItem = ans->stack[0] ;
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return ans;
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}
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PRBool
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startsWith (const char* pattern, const char* uuid)
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{
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int l1 = strlen(pattern);
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int l2 = strlen(uuid);
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int n;
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if (l2 < l1) return 0;
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for (n = 0; n < l1; n++) {
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if (pattern[n] != uuid[n]) return 0;
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}
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return 1;
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}
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char*
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getMem (size_t n) {
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char* ans = (char*) malloc(n);
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if (ans) memset(ans, '\0', n);
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return ans;
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}
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void
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freeMem(void* item) {
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free(item);
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}
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char
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decodeEntityRef (char* string, int* stringIndexPtr, int len) {
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if (startsWith("lt;", string)) {
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*stringIndexPtr = *stringIndexPtr + 3;
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return '<';
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} else if (startsWith("gt;", string)) {
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*stringIndexPtr = *stringIndexPtr + 3;
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return '>';
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} else if (startsWith("amp;", string)) {
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*stringIndexPtr = *stringIndexPtr + 4;
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return '&';
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} else return '&';
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}
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char *
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copyStringIgnoreWhiteSpace(char* string)
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{
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int len = strlen(string);
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char* buf = (char*)getMem(len + 1);
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PRBool inWhiteSpace = 1;
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int buffIndex = 0;
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int stringIndex = 0;
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while (stringIndex < len) {
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char nextChar = *(string + stringIndex);
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PRBool wsp = wsCharp(nextChar);
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if (!wsp) {
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if (nextChar == '&') {
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*(buf + buffIndex++) = decodeEntityRef(&string[stringIndex+1],
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&stringIndex, len-stringIndex);
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} else {
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*(buf + buffIndex++) = nextChar;
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}
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inWhiteSpace = 0;
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} else if (!inWhiteSpace) {
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*(buf + buffIndex++) = ' ';
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inWhiteSpace = 1;
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} else {
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inWhiteSpace = 1;
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}
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stringIndex++;
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}
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return buf;
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}
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char *
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getHref(char** attlist)
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{
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char* ans = getAttributeValue(attlist, "resource");
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if (!ans) ans = getAttributeValue(attlist, "rdf:resource");
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return ans;
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}
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char *
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getID(char** attlist)
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{
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char* ans = getAttributeValue(attlist, "id");
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if (!ans) ans = getAttributeValue(attlist, "about");
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if (!ans) ans = getAttributeValue(attlist, "rdf:about");
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return ans;
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}
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int
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parseNextRDFXMLBlobInt(RDFFile f, char* blob, int size) {
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int n, last, m;
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PRBool somethingseenp = 0;
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n = last = 0;
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while (n < size) {
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char c = blob[n];
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if ((c == '\n') || (c == '\r')) lineNumber++;
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m = 0;
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somethingseenp = 0;
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memset(f->line, '\0', RDF_BUF_SIZE-1);
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if (f->holdOver[0] != '\0') {
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memcpy(f->line, f->holdOver, strlen(f->holdOver));
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m = strlen(f->holdOver);
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somethingseenp = 1;
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memset(f->holdOver, '\0', RDF_BUF_SIZE-1);
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}
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while ((n < size) && (wsCharp(c))) {
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c = blob[++n];
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if ((c == '\n') || (c == '\r')) lineNumber++;
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}
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while ((m < RDF_BUF_SIZE) && (c != '<') && (c != '>')) {
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f->line[m] = c;
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m++;
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somethingseenp = (somethingseenp || (!(wsCharp(c))));
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n++;
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if (n < size) c = blob[n];
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else break;
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if ((c == '\n') || (c == '\r')) lineNumber++;
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}
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if (c == '>') f->line[m] = c;
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n++;
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if (m > 0) {
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if ((c == '<') || (c == '>')) {
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last = n;
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if (c == '<') f->holdOver[0] = '<';
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if (somethingseenp == 1) {
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int ok = parseNextRDFToken(f, f->line);
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if (!ok)
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return 0;
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}
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} else if (size > last) {
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memcpy(f->holdOver, f->line, m);
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}
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} else if (c == '<') f->holdOver[0] = '<';
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}
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return(1);
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}
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char *
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getAttributeValue (char** attlist, char* elName)
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{
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size_t n = 0;
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if (!attlist) return NULL;
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while ((n < 2*MAX_ATTRIBUTES) && (*(attlist + n) != NULL)) {
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if (strcmp(*(attlist + n), elName) == 0) return *(attlist + n + 1);
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n = n + 2;
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}
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return NULL;
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}
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char*
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copyString (char* str) {
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char* ans = getMem(strlen(str)+1);
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if (ans) {
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memcpy(ans, str, strlen(str));
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return ans;
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} else return NULL;
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}
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void
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addElementProps (char** attlist, char* elementName, RDFFile f, RDF_Resource obj)
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{
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int count = 0;
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while (count < 2*MAX_ATTRIBUTES) {
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char* attName = attlist[count++];
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char* attValue = attlist[count++];
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if ((attName == NULL) || (attValue == NULL)) break;
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if (!stringEquals(attName, "resource") &&
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!stringEquals(attName, "rdf:resource") &&
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!stringEquals(attName, "about") &&
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!stringEquals(attName, "rdf:about") &&
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!stringEquals(attName, "tv") &&
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!stringEquals(attName, "id")) {
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remoteStoreAdd(f, obj, getResource(f, attName),
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copyStringIgnoreWhiteSpace(attValue),
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RDF_STRING_TYPE, 1);
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}
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}
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}
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int
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parseNextRDFToken (RDFFile f, char* token)
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{
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char* attlist[2*MAX_ATTRIBUTES+1];
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char* elementName;
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if (token[0] == '<') {
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size_t len = strlen(token);
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if (token[len-2] != '/') {
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if (token[1] == '/') {
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char* tok = getMem(len);
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memcpy(tok, &token[2], len-3);
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if (!stringEquals(tok, f->tagStack[f->tagDepth-1])) {
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sprintf(error_string, "Unbalanced tags : Expecting </%s>, found %s",
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f->tagStack[f->tagDepth-1], token);
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return 0;
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} else {
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f->tagDepth--;
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freeMem(tok);
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}
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}
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}
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}
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if (token[0] != '<') {
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if ((f->status == EXPECTING_OBJECT) && (f->depth > 1)) {
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RDF_Resource u = f->stack[f->depth-2];
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RDF_Resource s = f->stack[f->depth-1];
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char* val = copyStringIgnoreWhiteSpace(token);
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remoteStoreAdd(f, u, s, val , RDF_STRING_TYPE, 1);
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} else {
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sprintf(error_string, "Did not expect \n\"%s\".\n Was expecting a tag.", token);
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return 0;
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}
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} else if (startsWith("<!--", token)) {
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return 1;
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} else if (token[1] == '?') {
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return 1;
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} else if (token[1] == '/') {
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if ((f->status != EXPECTING_OBJECT) && (f->status != EXPECTING_PROPERTY)) {
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sprintf(error_string, "Did not expect %s. Something pretty screwed up", token);
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return 0;
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}
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if (f->depth > 0) f->depth--;
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f->status = (f->status == EXPECTING_OBJECT ? EXPECTING_PROPERTY : EXPECTING_OBJECT);
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return 1;
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} else if ((f->status == 0) && (startsWith("<RDF:RDF", token) ||
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startsWith("<RDF>", token))) {
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f->tagStack[f->tagDepth++] = copyString("RDF");
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f->status = EXPECTING_OBJECT;
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return 1;
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} else {
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PRBool emptyElementp = (token[strlen(token)-2] == '/');
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if ((f->status != EXPECTING_OBJECT) && (f->status != EXPECTING_PROPERTY)) return 1;
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if (!tokenizeElement(token, attlist, &elementName)) return 0;
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if (!emptyElementp)
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f->tagStack[f->tagDepth++] = copyString(elementName);
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if (f->status == EXPECTING_OBJECT) {
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char* url = NULL;
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RDF_Resource obj;
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int count = 0;
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url = getID(attlist);
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if (!url) {
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if (f->tagDepth > 2) {
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sprintf(error_string, "Unbalanced tags : Expecting </%s>, found %s",
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f->tagStack[f->tagDepth-2], token);
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} else {
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sprintf(error_string, "Require a \"about\" attribute on %s", token);
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}
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return 0;
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}
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obj = getResource(f, url);
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addElementProps (attlist, elementName, f, obj) ;
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if (!stringEquals(elementName, "RDF:Description")) {
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RDF_Resource eln = getResource(f, elementName);
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remoteStoreAdd(f, obj, getResource(NULL, "instanceOf"),
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eln, RDF_RESOURCE_TYPE,
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1);
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}
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if (f->depth > 1) {
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remoteStoreAdd(f, f->stack[f->depth-2], f->stack[f->depth-1], obj,
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RDF_RESOURCE_TYPE, 1);
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}
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if (!emptyElementp) {
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f->stack[f->depth++] = obj;
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f->status = EXPECTING_PROPERTY;
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}
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} else if (f->status == EXPECTING_PROPERTY) {
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char* url;
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RDF_Resource obj;
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int count = 0;
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url = getHref(attlist) ;
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if (url) {
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RDF_Resource eln = getResource(f, elementName);
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char* tvAtt = getAttributeValue(attlist, "tv");
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obj = getResource(f, url);
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freeMem(url);
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addElementProps (attlist, elementName, f, obj) ;
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remoteStoreAdd(f, f->stack[f->depth-1], eln, obj, RDF_RESOURCE_TYPE, 1);
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}
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if (!emptyElementp) {
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f->stack[f->depth++] = getResource(f, elementName);
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f->status = EXPECTING_OBJECT;
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}
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}
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}
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}
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int
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tokenizeElement (char* attr, char** attlist, char** elementName)
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{
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size_t n = 1;
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size_t s = strlen(attr);
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char c ;
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size_t m = 0;
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size_t atc = 0;
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PRBool emptyTagp = (attr[s-2] == '/');
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PRBool inAttrNamep = 1;
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c = attr[n++];
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while (wsCharp(c)) {
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c = attr[n++];
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}
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*elementName = &attr[n-1];
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while (n < s) {
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if (wsCharp(c)) break;
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c = attr[n++];
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}
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attr[n-1] = '\0';
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while (atc < 2*MAX_ATTRIBUTES+1) {*(attlist + atc++) = NULL;}
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atc = 0;
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s = (emptyTagp ? s-2 : s-1);
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while (n < s) {
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PRBool attributeOpenStringSeenp = 0;
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m = 0;
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c = attr[n++];
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while ((n <= s) && (atc < 2*MAX_ATTRIBUTES)) {
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if (inAttrNamep && (m > 0) && (wsCharp(c) || (c == '='))) {
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attr[n-1] = '\0';
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*(attlist + atc++) = &attr[n-m-1];
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break;
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}
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if (!inAttrNamep && attributeOpenStringSeenp && (c == '"')) {
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attr[n-1] = '\0';
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*(attlist + atc++) = &attr[n-m-1];
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break;
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}
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if (inAttrNamep) {
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if ((m > 0) || (!wsCharp(c))) m++;
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} else {
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if (c == '"') {
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attributeOpenStringSeenp = 1;
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} else {
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if ((m > 0) || (!(wsCharp(c)))) m++;
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}
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}
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c = attr[n++];
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}
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inAttrNamep = (inAttrNamep ? 0 : 1);
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}
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return 1;
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}
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