static PyObject* jellyfish_porter_stem(PyObject *self, PyObject *args)
{
const char *str;
char *result;
PyObject *ret;
struct stemmer *z;
int end;
if (!PyArg_ParseTuple(args, "s", &str)) {
return NULL;
}
z = create_stemmer();
if (!z) {
PyErr_NoMemory();
return NULL;
}
result = strdup(str);
if (!result) {
free_stemmer(z);
PyErr_NoMemory();
return NULL;
}
end = stem(z, result, strlen(result) - 1);
result[end + 1] = '\0';
ret = Py_BuildValue("s", result);
free(result);
free_stemmer(z);
return ret;
}
/* Tokenize a given sds, setting a term to zero-length sds if it's
* a stopword. A total number of tokens and total number of nonstopwords
* will be returned */
static sds *sds_tokenize(sds s, int *len, int *nonstopwords) {
int i, l, k;
sds *terms;
struct stemmer *stmer;
*nonstopwords = 0;
terms = sdssplitlen(s, sdslen(s), " ", 1, len);
if (!terms) return NULL;
stmer = create_stemmer();
for (i = 0; i < *len; i++) {
sds stemmed = NULL, term = terms[i];
term = sdstrim(term, puncs);
l = sdslen(term);
sdstolower(term);
if (l == 0 || rr_stopwords_check(term)) {
sdsclear(term);
continue;
}
*nonstopwords += 1;
/* note that the third argument is a zero-based index */
k = stem(stmer, term, l-1);
if (k < l-1) {
stemmed = sdsnewlen(term, k+1);
sdsfree(term);
terms[i] = stemmed;
}
}
free_stemmer(stmer);
return terms;
}
CAMLprim value caml_stemmer_porter2_close(value v_stem)
{
CAMLparam1(v_stem);
struct stemmer_t* val = (struct stemmer_t*)v_stem;
free_stemmer(val->st);
free(val->buf);
free(val);
CAMLreturn(Val_unit);
}
int main(int argc, char * argv[])
{ int i;
struct stemmer * z = create_stemmer();
s = (char *) malloc(i_max + 1);
for (i = 1; i < argc; i++)
{ FILE * f = fopen(argv[i],"r");
if (f == 0) { fprintf(stderr,"File %s not found\n",argv[i]); exit(1); }
stemfile(z, f);
}
free(s);
free_stemmer(z);
return 0;
}
/**
* filters, transforms, and indexes file using ngrams to the index
*
* file name - name of file to process
* wikiindex - the judy arrays to store the index of the wiki in
*/
void indexWiki(char* inFileName, Pvoid_t *wikiIndex, int* articleCount) {
//-------------------- initialization --------------------//
bool articleIndex[lastNgram] = {0}; // boolean array of what trigrams are in an article
struct stemmer * currentStemmer = create_stemmer();
// file for writing the titles to
FILE* titleFile = NULL;
if (writeFiles) {
titleFile = fopen("title_file", "w");
if (NULL == titleFile) {
fprintf(stderr, "Error open title file: %m\n");
exit(1);
}
}
// initializes the libxml library
LIBXML_TEST_VERSION
xmlTextReaderPtr wikiReader; //the reader for the document
wikiReader = xmlReaderForFile(inFileName, NULL, XML_PARSE_RECOVER+XML_PARSE_NOWARNING+XML_PARSE_NOERROR+XML_PARSE_HUGE);
if (NULL == wikiReader) {
//fprintf(stderr, "%s %s\n", "Failed to open ", wikiFileName);
fprintf(stderr, "Error opening XML wiki: %m\n");
exit(1);
}
// for progress bar
int percent = 0;
long fileSize = getFileSize(inFileName);
// initialization for currentArticle and its componens
article currentArticle;
currentArticle.title = g_string_sized_new(256);
currentArticle.body = g_string_sized_new(786432); //768*1024
//-------------------- index the wiki --------------------//
optionalPrint ("%s", "Adding collection to index.\n");
optionalPrint ("%d", (int)(fileSize / 1048576));
optionalPrint (" MB in file\n");
displayProgressBar (xmlTextReaderByteConsumed(wikiReader), fileSize, &percent);
//prime the loop
currentArticle.title->len = 0;
currentArticle.body->len = 0;
xmlTextReaderRead(wikiReader);// at a <page> tag, drop in
xmlTextReaderRead(wikiReader);// at a <page> tag, drop in
// reads from xml file until file is finished, adds articles to index, and writes tittles to file
// processes one article per iteration
while (getArticle (wikiReader, ¤tArticle)) {
currentArticle.articleNumber = *articleCount;
*articleCount = *articleCount + 1;
// filter / transform text
removeMarkup(currentArticle.body);
stemText(currentArticle.body, currentStemmer); //ngramming.h
// index the text
indexText(currentArticle.body, articleIndex); //ngramming.h
addToIndex(articleIndex, wikiIndex, currentArticle.articleNumber);
//adds titles to title file
if (writeFiles) {fprintf(titleFile, "%s\n", currentArticle.title->str);}
//re-prime the loop
currentArticle.title->len = 0;
currentArticle.body->len = 0;
displayProgressBar (xmlTextReaderByteConsumed(wikiReader), fileSize, &percent);
}
optionalPrint ("\n%s", "Finished indexing. \n");
optionalPrint ("%lu", (long)(xmlTextReaderByteConsumed(wikiReader)/1048576));
optionalPrint ("MB consumed\n");
optionalPrint ("%d %s %d %s", *articleCount, "articles found", (int) currentArticle.body->allocated_len, "length allocated for article body\n");
// clean up of structures needed to process wiki
if (writeFiles) {fclose (titleFile);}
free_stemmer(currentStemmer);
xmlFreeTextReader(wikiReader);
xmlCleanupParser();
//g_string_free(currentArticle.title, TRUE);
//g_string_free(currentArticle.body, TRUE); //malloc fail if this is uncommented ?!
}
