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#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>
#include "dictmgr.hxx"
DictMgr::DictMgr(const char * dictpath, const char * etype) : numdict(0)
{
// load list of etype entries
pdentry = (dictentry *)malloc(MAXDICTIONARIES*sizeof(struct dictentry));
if (pdentry) {
if (parse_file(dictpath, etype)) {
numdict = 0;
// no dictionary.lst found is okay
}
}
}
DictMgr::~DictMgr()
{
dictentry * pdict = NULL;
if (pdentry) {
pdict = pdentry;
for (int i=0;i<numdict;i++) {
if (pdict->lang) {
free(pdict->lang);
pdict->lang = NULL;
}
if (pdict->region) {
free(pdict->region);
pdict->region=NULL;
}
if (pdict->filename) {
free(pdict->filename);
pdict->filename = NULL;
}
pdict++;
}
free(pdentry);
pdentry = NULL;
pdict = NULL;
}
numdict = 0;
}
// read in list of etype entries and build up structure to describe them
int DictMgr::parse_file(const char * dictpath, const char * etype)
{
int i;
char line[MAXDICTENTRYLEN+1];
dictentry * pdict = pdentry;
// open the dictionary list file
FILE * dictlst;
dictlst = fopen(dictpath,"r");
if (!dictlst) {
return 1;
}
// step one is to parse the dictionary list building up the
// descriptive structures
// read in each line ignoring any that dont start with etype
while (fgets(line,MAXDICTENTRYLEN,dictlst)) {
mychomp(line);
/* parse in a dictionary entry */
if (strncmp(line,etype,4) == 0) {
if (numdict < MAXDICTIONARIES) {
char * tp = line;
char * piece;
i = 0;
while ((piece=mystrsep(&tp,' '))) {
if (*piece != '\0') {
switch(i) {
case 0: break;
case 1: pdict->lang = mystrdup(piece); break;
case 2: if (strcmp (piece, "ANY") == 0)
pdict->region = mystrdup("");
else
pdict->region = mystrdup(piece);
break;
case 3: pdict->filename = mystrdup(piece); break;
default: break;
}
i++;
}
free(piece);
}
if (i == 4) {
numdict++;
pdict++;
} else {
switch (i) {
case 3:
free(pdict->region);
pdict->region=NULL;
case 2: //deliberate fallthrough
free(pdict->lang);
pdict->lang=NULL;
default:
break;
}
fprintf(stderr,"dictionary list corruption in line \"%s\"\n",line);
fflush(stderr);
}
}
}
}
fclose(dictlst);
return 0;
}
// return text encoding of dictionary
int DictMgr::get_list(dictentry ** ppentry)
{
*ppentry = pdentry;
return numdict;
}
// strip strings into token based on single char delimiter
// acts like strsep() but only uses a delim char and not
// a delim string
char * DictMgr::mystrsep(char ** stringp, const char delim)
{
char * rv = NULL;
char * mp = *stringp;
size_t n = strlen(mp);
if (n > 0) {
char * dp = (char *)memchr(mp,(int)((unsigned char)delim),n);
if (dp) {
*stringp = dp+1;
size_t nc = dp - mp;
rv = (char *) malloc(nc+1);
if (rv) {
memcpy(rv,mp,nc);
*(rv+nc) = '\0';
}
} else {
rv = (char *) malloc(n+1);
if (rv) {
memcpy(rv, mp, n);
*(rv+n) = '\0';
*stringp = mp + n;
}
}
}
return rv;
}
// replaces strdup with ansi version
char * DictMgr::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 DictMgr:: 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';
}
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