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RetroZilla/rdf/opendir/spf2ldiff.c
Ryan Nematz 2f2ae146c0 first commit
2015-10-20 23:03:22 -04:00

449 lines
12 KiB
C
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "rdf-int.h"
char* error_string = NULL;
int lineNumber = 0;
void
main (int argc, char* argv[]) {
RDFFile rf = initFileStruct();
int ok = 1;
error_string = getMem(1000);
if (argc == 2) {
FILE* f = fopen(argv[1], "r");
if (f != NULL) {
char* buff = getMem(RDF_BUF_SIZE);
int len;
while (ok && ((len = fread(buff, 1, RDF_BUF_SIZE-1, f)) > 0)) {
buff[len] = '\0';
ok = parseNextRDFXMLBlobInt(rf, buff, strlen(buff));
memset(buff, '\0', RDF_BUF_SIZE);
}
}
if (ok) {
while (1) {
char* nextQuery = getMem(200);
int n;
nextQuery = gets(nextQuery);
if (nextQuery) {
char** ans = processRDFQuery(nextQuery);
if (ans) {
for (n = 0; ans[n] != NULL; n++) {
printf("%s\n", ans[n]);
}
}
} else {
break;
}
}
}
}
}
void
RDF_Init () {
error_string = getMem(1000);
}
int
RDF_DigestNewStuff (char* fileName, char* data, int len) {
RDFFile rf = initFileStruct();
int ok = 1;
ok = parseNextRDFXMLBlobInt(rf, data, len);
freeMem(rf->line);
freeMem(rf->holdOver);
return ok;
}
RDFFile
initFileStruct (void) {
RDFFile ans = (RDFFile)getMem(sizeof(RDF_FileStruct));
ans->line = (char*)getMem(RDF_BUF_SIZE);
ans->holdOver = (char*)getMem(RDF_BUF_SIZE);
ans->depth = 1;
ans->lastItem = ans->stack[0] ;
return ans;
}
PRBool
startsWith (const char* pattern, const char* uuid)
{
int l1 = strlen(pattern);
int l2 = strlen(uuid);
int n;
if (l2 < l1) return 0;
for (n = 0; n < l1; n++) {
if (pattern[n] != uuid[n]) return 0;
}
return 1;
}
char*
getMem (size_t n) {
return (char*) calloc(1, n);
}
void
freeMem(void* item) {
free(item);
}
char
decodeEntityRef (char* string, int* stringIndexPtr, int len) {
if (startsWith("lt;", string)) {
*stringIndexPtr = *stringIndexPtr + 3;
return '<';
} else if (startsWith("gt;", string)) {
*stringIndexPtr = *stringIndexPtr + 3;
return '>';
} else if (startsWith("amp;", string)) {
*stringIndexPtr = *stringIndexPtr + 4;
return '&';
} else return '&';
}
char *
copyStringIgnoreWhiteSpace(char* string)
{
int len = strlen(string);
char* buf = (char*)getMem(len + 1);
PRBool inWhiteSpace = 1;
int buffIndex = 0;
int stringIndex = 0;
while (stringIndex < len) {
char nextChar = *(string + stringIndex);
PRBool wsp = wsCharp(nextChar);
if (!wsp) {
if (nextChar == '&') {
*(buf + buffIndex++) = decodeEntityRef(&string[stringIndex+1],
&stringIndex, len-stringIndex);
} else {
*(buf + buffIndex++) = nextChar;
}
inWhiteSpace = 0;
} else if (!inWhiteSpace) {
*(buf + buffIndex++) = ' ';
inWhiteSpace = 1;
} else {
inWhiteSpace = 1;
}
stringIndex++;
}
return buf;
}
char *
getHref(char** attlist)
{
char* ans = getAttributeValue(attlist, "resource");
if (!ans) ans = getAttributeValue(attlist, "rdf:resource");
return ans;
}
char *
getID(char** attlist)
{
char* ans = getAttributeValue(attlist, "id");
if (!ans) ans = getAttributeValue(attlist, "about");
if (!ans) ans = getAttributeValue(attlist, "rdf:about");
return ans;
}
int
parseNextRDFXMLBlobInt(RDFFile f, char* blob, int size) {
int n, last, m;
PRBool somethingseenp = 0;
n = last = 0;
while (n < size) {
char c = blob[n];
if ((c == '\n') || (c == '\r')) lineNumber++;
m = 0;
somethingseenp = 0;
memset(f->line, '\0', RDF_BUF_SIZE-1);
if (f->holdOver[0] != '\0') {
memcpy(f->line, f->holdOver, strlen(f->holdOver));
m = strlen(f->holdOver);
somethingseenp = 1;
memset(f->holdOver, '\0', RDF_BUF_SIZE-1);
}
while ((n < size) && (wsCharp(c))) {
c = blob[++n];
if ((c == '\n') || (c == '\r')) lineNumber++;
}
while ((m < RDF_BUF_SIZE) && (c != '<') && (c != '>')) {
f->line[m] = c;
m++;
somethingseenp = (somethingseenp || (!(wsCharp(c))));
n++;
if (n < size) c = blob[n];
else break;
if ((c == '\n') || (c == '\r')) lineNumber++;
}
if (c == '>') f->line[m] = c;
n++;
if (m > 0) {
if ((c == '<') || (c == '>')) {
last = n;
if (c == '<') f->holdOver[0] = '<';
if (somethingseenp == 1) {
int ok = parseNextRDFToken(f, f->line);
if (!ok)
return 0;
}
} else if (size > last) {
memcpy(f->holdOver, f->line, m);
}
} else if (c == '<') f->holdOver[0] = '<';
}
return(1);
}
char *
getAttributeValue (char** attlist, char* elName)
{
size_t n = 0;
if (!attlist) return NULL;
while ((n < 2*MAX_ATTRIBUTES) && (*(attlist + n) != NULL)) {
if (strcmp(*(attlist + n), elName) == 0) return *(attlist + n + 1);
n = n + 2;
}
return NULL;
}
char*
copyString (char* str) {
char* ans = getMem(strlen(str)+1);
if (ans) {
memcpy(ans, str, strlen(str));
return ans;
} else return NULL;
}
void
addElementProps (char** attlist, char* elementName, RDFFile f, RDF_Resource obj)
{
int count = 0;
while (count < 2*MAX_ATTRIBUTES) {
char* attName = attlist[count++];
char* attValue = attlist[count++];
if ((attName == NULL) || (attValue == NULL)) break;
if (!stringEquals(attName, "resource") &&
!stringEquals(attName, "rdf:resource") &&
!stringEquals(attName, "about") &&
!stringEquals(attName, "rdf:about") &&
!stringEquals(attName, "tv") &&
!stringEquals(attName, "id")) {
remoteStoreAdd(f, obj, getResource(f, attName),
copyStringIgnoreWhiteSpace(attValue),
RDF_STRING_TYPE, 1);
}
}
}
int
parseNextRDFToken (RDFFile f, char* token)
{
char* attlist[2*MAX_ATTRIBUTES+1];
char* elementName;
if (token[0] == '<') {
size_t len = strlen(token);
if (token[len-2] != '/') {
if (token[1] == '/') {
char* tok = getMem(len);
memcpy(tok, &token[2], len-3);
if (!stringEquals(tok, f->tagStack[f->tagDepth-1])) {
sprintf(error_string, "Unbalanced tags : Expecting </%s>, found %s",
f->tagStack[f->tagDepth-1], token);
return 0;
} else {
f->tagDepth--;
freeMem(tok);
}
}
}
}
if (token[0] != '<') {
if ((f->status == EXPECTING_OBJECT) && (f->depth > 1)) {
RDF_Resource u = f->stack[f->depth-2];
RDF_Resource s = f->stack[f->depth-1];
char* val = copyStringIgnoreWhiteSpace(token);
remoteStoreAdd(f, u, s, val , RDF_STRING_TYPE, 1);
} else {
sprintf(error_string, "Did not expect \n\"%s\".\n Was expecting a tag.", token);
return 0;
}
} else if (startsWith("<!--", token)) {
return 1;
} else if (token[1] == '?') {
return 1;
} else if (token[1] == '/') {
if ((f->status != EXPECTING_OBJECT) && (f->status != EXPECTING_PROPERTY)) {
sprintf(error_string, "Did not expect %s. Something pretty screwed up", token);
return 0;
}
if (f->depth > 0) f->depth--;
f->status = (f->status == EXPECTING_OBJECT ? EXPECTING_PROPERTY : EXPECTING_OBJECT);
return 1;
} else if ((f->status == 0) && (startsWith("<RDF:RDF", token) ||
startsWith("<RDF>", token))) {
f->tagStack[f->tagDepth++] = copyString("RDF");
f->status = EXPECTING_OBJECT;
return 1;
} else {
PRBool emptyElementp = (token[strlen(token)-2] == '/');
if ((f->status != EXPECTING_OBJECT) && (f->status != EXPECTING_PROPERTY)) return 1;
if (!tokenizeElement(token, attlist, &elementName)) return 0;
if (!emptyElementp)
f->tagStack[f->tagDepth++] = copyString(elementName);
if (f->status == EXPECTING_OBJECT) {
char* url = NULL;
RDF_Resource obj;
int count = 0;
url = getID(attlist);
if (!url) {
if (f->tagDepth > 2) {
sprintf(error_string, "Unbalanced tags : Expecting </%s>, found %s",
f->tagStack[f->tagDepth-2], token);
} else {
sprintf(error_string, "Require a \"about\" attribute on %s", token);
}
return 0;
}
obj = getResource(f, url);
addElementProps (attlist, elementName, f, obj) ;
if (!stringEquals(elementName, "RDF:Description")) {
RDF_Resource eln = getResource(f, elementName);
remoteStoreAdd(f, obj, getResource(NULL, "instanceOf"),
eln, RDF_RESOURCE_TYPE,
1);
}
if (f->depth > 1) {
remoteStoreAdd(f, f->stack[f->depth-2], f->stack[f->depth-1], obj,
RDF_RESOURCE_TYPE, 1);
}
if (!emptyElementp) {
f->stack[f->depth++] = obj;
f->status = EXPECTING_PROPERTY;
}
} else if (f->status == EXPECTING_PROPERTY) {
char* url;
RDF_Resource obj;
int count = 0;
url = getHref(attlist) ;
if (url) {
RDF_Resource eln = getResource(f, elementName);
char* tvAtt = getAttributeValue(attlist, "tv");
obj = getResource(f, url);
freeMem(url);
addElementProps (attlist, elementName, f, obj) ;
remoteStoreAdd(f, f->stack[f->depth-1], eln, obj, RDF_RESOURCE_TYPE, 1);
}
if (!emptyElementp) {
f->stack[f->depth++] = getResource(f, elementName);
f->status = EXPECTING_OBJECT;
}
}
}
}
int
tokenizeElement (char* attr, char** attlist, char** elementName)
{
size_t n = 1;
size_t s = strlen(attr);
char c ;
size_t m = 0;
size_t atc = 0;
PRBool emptyTagp = (attr[s-2] == '/');
PRBool inAttrNamep = 1;
c = attr[n++];
while (wsCharp(c)) {
c = attr[n++];
}
*elementName = &attr[n-1];
while (n < s) {
if (wsCharp(c)) break;
c = attr[n++];
}
attr[n-1] = '\0';
while (atc < 2*MAX_ATTRIBUTES+1) {*(attlist + atc++) = NULL;}
atc = 0;
s = (emptyTagp ? s-2 : s-1);
while (n < s) {
PRBool attributeOpenStringSeenp = 0;
m = 0;
c = attr[n++];
while ((n <= s) && (atc < 2*MAX_ATTRIBUTES)) {
if (inAttrNamep && (m > 0) && (wsCharp(c) || (c == '='))) {
attr[n-1] = '\0';
*(attlist + atc++) = &attr[n-m-1];
break;
}
if (!inAttrNamep && attributeOpenStringSeenp && (c == '"')) {
attr[n-1] = '\0';
*(attlist + atc++) = &attr[n-m-1];
break;
}
if (inAttrNamep) {
if ((m > 0) || (!wsCharp(c))) m++;
} else {
if (c == '"') {
attributeOpenStringSeenp = 1;
} else {
if ((m > 0) || (!(wsCharp(c)))) m++;
}
}
c = attr[n++];
}
inAttrNamep = (inAttrNamep ? 0 : 1);
}
return 1;
}
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