mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-15 15:45:43 +00:00
378 lines
8.7 KiB
C++
378 lines
8.7 KiB
C++
#include "COPYING"
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <limits>
|
|
#include <vector>
|
|
|
|
#include "mythes.hxx"
|
|
|
|
MyThes::MyThes(const char* idxpath, const char * datpath)
|
|
{
|
|
nw = 0;
|
|
encoding = NULL;
|
|
list = NULL;
|
|
offst = NULL;
|
|
pdfile = NULL;
|
|
|
|
if (thInitialize(idxpath, datpath) != 1) {
|
|
fprintf(stderr,"Error - can't open %s or %s\n",idxpath, datpath);
|
|
fflush(stderr);
|
|
thCleanup();
|
|
// did not initialize properly - throw exception?
|
|
}
|
|
}
|
|
|
|
|
|
MyThes::~MyThes()
|
|
{
|
|
thCleanup();
|
|
}
|
|
|
|
|
|
int MyThes::thInitialize(const char* idxpath, const char* datpath)
|
|
{
|
|
|
|
// open the index file
|
|
FILE * pifile = fopen(idxpath,"r");
|
|
if (!pifile) {
|
|
return 0;
|
|
}
|
|
|
|
// parse in encoding and index size */
|
|
std::vector<char> buffer(MAX_WD_LEN);
|
|
char * wrd = &buffer[0];
|
|
readLine(pifile,wrd,MAX_WD_LEN);
|
|
encoding = mystrdup(wrd);
|
|
readLine(pifile,wrd,MAX_WD_LEN);
|
|
int idxsz = atoi(wrd);
|
|
|
|
// spitz: fix -Wsign-compare warning
|
|
if (idxsz <= 0 || static_cast<unsigned int>(idxsz) > std::numeric_limits<int>::max() / sizeof(char*)) {
|
|
fprintf(stderr,"Error - bad index %d\n", idxsz);
|
|
fclose(pifile);
|
|
return 0;
|
|
}
|
|
|
|
// now allocate list, offst for the given size
|
|
list = (char**) calloc(idxsz,sizeof(char*));
|
|
offst = (unsigned int*) calloc(idxsz,sizeof(unsigned int));
|
|
|
|
if ( (!(list)) || (!(offst)) ) {
|
|
fprintf(stderr,"Error - bad memory allocation\n");
|
|
fclose(pifile);
|
|
return 0;
|
|
}
|
|
|
|
// now parse the remaining lines of the index
|
|
int len = readLine(pifile,wrd,MAX_WD_LEN);
|
|
while (len > 0)
|
|
{
|
|
int np = mystr_indexOfChar(wrd,'|');
|
|
if (nw < idxsz) {
|
|
if (np >= 0) {
|
|
*(wrd+np) = '\0';
|
|
list[nw] = (char *)calloc(1,(np+1));
|
|
if (!list[nw]) {
|
|
fprintf(stderr,"Error - bad memory allocation\n");
|
|
fflush(stderr);
|
|
fclose(pifile);
|
|
return 0;
|
|
}
|
|
memcpy((list[nw]),wrd,np);
|
|
offst[nw] = atoi(wrd+np+1);
|
|
nw++;
|
|
}
|
|
}
|
|
len = readLine(pifile,wrd,MAX_WD_LEN);
|
|
}
|
|
|
|
fclose(pifile);
|
|
|
|
/* next open the data file */
|
|
pdfile = fopen(datpath,"r");
|
|
if (!pdfile) {
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
void MyThes::thCleanup()
|
|
{
|
|
/* first close the data file */
|
|
if (pdfile) {
|
|
fclose(pdfile);
|
|
pdfile=NULL;
|
|
}
|
|
|
|
if (list)
|
|
{
|
|
/* now free up all the allocated strings on the list */
|
|
for (int i=0; i < nw; i++)
|
|
{
|
|
if (list[i]) {
|
|
free(list[i]);
|
|
list[i] = 0;
|
|
}
|
|
}
|
|
free((void*)list);
|
|
}
|
|
|
|
if (encoding) free((void*)encoding);
|
|
if (offst) free((void*)offst);
|
|
|
|
encoding = NULL;
|
|
list = NULL;
|
|
offst = NULL;
|
|
nw = 0;
|
|
}
|
|
|
|
|
|
|
|
// lookup text in index and count of meanings and a list of meaning entries
|
|
// with each entry having a synonym count and pointer to an
|
|
// array of char * (i.e the synonyms)
|
|
//
|
|
// note: calling routine should call CleanUpAfterLookup with the original
|
|
// meaning point and count to properly deallocate memory
|
|
|
|
int MyThes::Lookup(const char * pText, int len, mentry** pme)
|
|
{
|
|
|
|
*pme = NULL;
|
|
|
|
// handle the case of missing file or file related errors
|
|
if (! pdfile) return 0;
|
|
|
|
long offset = 0;
|
|
|
|
/* copy search word and make sure null terminated */
|
|
std::vector<char> buffer(len+1);
|
|
char * wrd = &buffer[0];
|
|
memcpy(wrd,pText,len);
|
|
|
|
/* find it in the list */
|
|
int idx = nw > 0 ? binsearch(wrd,list,nw) : -1;
|
|
if (idx < 0) return 0;
|
|
|
|
// now seek to the offset
|
|
offset = (long) offst[idx];
|
|
int rc = fseek(pdfile,offset,SEEK_SET);
|
|
if (rc) {
|
|
return 0;
|
|
}
|
|
|
|
// grab the count of the number of meanings
|
|
// and allocate a list of meaning entries
|
|
char * buf = NULL;
|
|
buf = (char *) malloc( MAX_LN_LEN );
|
|
if (!buf) return 0;
|
|
readLine(pdfile, buf, (MAX_LN_LEN-1));
|
|
int np = mystr_indexOfChar(buf,'|');
|
|
if (np < 0) {
|
|
free(buf);
|
|
return 0;
|
|
}
|
|
int nmeanings = atoi(buf+np+1);
|
|
// spitz: fix -Wsign-compare warning
|
|
if (nmeanings < 0 || static_cast<unsigned int>(nmeanings) > std::numeric_limits<int>::max() / sizeof(mentry))
|
|
nmeanings = 0;
|
|
*pme = (mentry*)(nmeanings ? malloc(nmeanings * sizeof(mentry)) : NULL);
|
|
if (!(*pme)) {
|
|
free(buf);
|
|
return 0;
|
|
}
|
|
|
|
// now read in each meaning and parse it to get defn, count and synonym lists
|
|
mentry* pm = *(pme);
|
|
char dfn[MAX_WD_LEN];
|
|
|
|
for (int j = 0; j < nmeanings; j++) {
|
|
readLine(pdfile, buf, (MAX_LN_LEN-1));
|
|
|
|
pm->count = 0;
|
|
pm->psyns = NULL;
|
|
pm->defn = NULL;
|
|
|
|
// store away the part of speech for later use
|
|
char * p = buf;
|
|
char * pos = NULL;
|
|
np = mystr_indexOfChar(p,'|');
|
|
if (np >= 0) {
|
|
*(buf+np) = '\0';
|
|
pos = mystrdup(p);
|
|
p = p + np + 1;
|
|
} else {
|
|
pos = mystrdup("");
|
|
}
|
|
|
|
// count the number of fields in the remaining line
|
|
int nf = 1;
|
|
char * d = p;
|
|
np = mystr_indexOfChar(d,'|');
|
|
while ( np >= 0 ) {
|
|
nf++;
|
|
d = d + np + 1;
|
|
np = mystr_indexOfChar(d,'|');
|
|
}
|
|
pm->count = nf;
|
|
pm->psyns = (char **) malloc(nf*sizeof(char*));
|
|
|
|
// fill in the synonym list
|
|
d = p;
|
|
for (int jj = 0; jj < nf; jj++)
|
|
{
|
|
np = mystr_indexOfChar(d,'|');
|
|
if (np > 0)
|
|
{
|
|
*(d+np) = '\0';
|
|
pm->psyns[jj] = mystrdup(d);
|
|
d = d + np + 1;
|
|
}
|
|
else
|
|
{
|
|
pm->psyns[jj] = mystrdup(d);
|
|
}
|
|
}
|
|
|
|
// add pos to first synonym to create the definition
|
|
if (pm->psyns[0])
|
|
{
|
|
int k = strlen(pos);
|
|
int m = strlen(pm->psyns[0]);
|
|
if ((k+m) < (MAX_WD_LEN - 1)) {
|
|
strncpy(dfn,pos,k);
|
|
*(dfn+k) = ' ';
|
|
strncpy((dfn+k+1),(pm->psyns[0]),m+1);
|
|
pm->defn = mystrdup(dfn);
|
|
} else {
|
|
pm->defn = mystrdup(pm->psyns[0]);
|
|
}
|
|
}
|
|
free(pos);
|
|
pm++;
|
|
|
|
}
|
|
free(buf);
|
|
|
|
return nmeanings;
|
|
}
|
|
|
|
|
|
|
|
void MyThes::CleanUpAfterLookup(mentry ** pme, int nmeanings)
|
|
{
|
|
|
|
if (nmeanings == 0) return;
|
|
if ((*pme) == NULL) return;
|
|
|
|
mentry * pm = *pme;
|
|
|
|
for (int i = 0; i < nmeanings; i++) {
|
|
int count = pm->count;
|
|
for (int j = 0; j < count; j++) {
|
|
if (pm->psyns[j]) free(pm->psyns[j]);
|
|
pm->psyns[j] = NULL;
|
|
}
|
|
if (pm->psyns) free(pm->psyns);
|
|
pm->psyns = NULL;
|
|
if (pm->defn) free(pm->defn);
|
|
pm->defn = NULL;
|
|
pm->count = 0;
|
|
pm++;
|
|
}
|
|
pm = *pme;
|
|
free(pm);
|
|
*pme = NULL;
|
|
return;
|
|
}
|
|
|
|
|
|
// read a line of text from a text file stripping
|
|
// off the line terminator and replacing it with
|
|
// a null string terminator.
|
|
// returns: -1 on error or the number of characters in
|
|
// in the returning string
|
|
|
|
// A maximum of nc characters will be returned
|
|
|
|
int MyThes::readLine(FILE * pf, char * buf, int nc)
|
|
{
|
|
|
|
if (fgets(buf,nc,pf)) {
|
|
mychomp(buf);
|
|
return strlen(buf);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
|
|
|
|
// performs a binary search on null terminated character
|
|
// strings
|
|
//
|
|
// returns: -1 on not found
|
|
// index of wrd in the list[]
|
|
|
|
int MyThes::binsearch(char * sw, char* _list[], int nlst)
|
|
{
|
|
int lp, up, mp, j, indx;
|
|
lp = 0;
|
|
up = nlst-1;
|
|
indx = -1;
|
|
if (strcmp(sw,_list[lp]) < 0) return -1;
|
|
if (strcmp(sw,_list[up]) > 0) return -1;
|
|
while (indx < 0 ) {
|
|
mp = (int)((lp+up) >> 1);
|
|
j = strcmp(sw,_list[mp]);
|
|
if ( j > 0) {
|
|
lp = mp + 1;
|
|
} else if (j < 0 ) {
|
|
up = mp - 1;
|
|
} else {
|
|
indx = mp;
|
|
}
|
|
if (lp > up) return -1;
|
|
}
|
|
return indx;
|
|
}
|
|
|
|
char * MyThes::get_th_encoding()
|
|
{
|
|
return encoding;
|
|
}
|
|
|
|
|
|
// string duplication routine
|
|
char * MyThes::mystrdup(const char * s)
|
|
{
|
|
char * d = NULL;
|
|
if (s) {
|
|
int sl = strlen(s)+1;
|
|
d = (char *) malloc(sl);
|
|
if (d) memcpy(d,s,sl);
|
|
}
|
|
return d;
|
|
}
|
|
|
|
// remove cross-platform text line end characters
|
|
void MyThes::mychomp(char * s)
|
|
{
|
|
int k = strlen(s);
|
|
if ((k > 0) && ((*(s+k-1)=='\r') || (*(s+k-1)=='\n'))) *(s+k-1) = '\0';
|
|
if ((k > 1) && (*(s+k-2) == '\r')) *(s+k-2) = '\0';
|
|
}
|
|
|
|
|
|
// return index of char in string
|
|
int MyThes::mystr_indexOfChar(const char * d, int c)
|
|
{
|
|
char * p = strchr((char *)d,c);
|
|
if (p) return (int)(p-d);
|
|
return -1;
|
|
}
|
|
|