So, here's my makefile:
OBJS = functions.o Sentence.o Word.o
libgramm.so : $(OBJS)
g++ -shared -Wl,-soname,libgramm.so.1 $(OBJS) -o libgramm.so
chmod a-x libgramm.so
cp functions.h libgramm.h
functions.o : functions.h functions.cpp
g++ -g -c -fPIC -Wall functions.cpp
Sentence.o : Sentence.h Sentence.cpp
g++ -g -c -fPIC -Wall Sentence.cpp
Word.o : Word.h Word.cpp
g++ -g -c -fPIC -Wall Word.cpp
.PHONY : clean
clean :
rm $(OBJS) libgramm.so
Here is the function prototype:
extern "C" unsigned int lg_findSentEnd(const std::string&, const int);
Here is the function itself:
unsigned int lg_findSentEnd(const string& sentences, const int start) {
// TODO: This can account for quotations if it has the whole sentence!
unsigned int place = sentences.size();
string quotes = "";
for(unsigned int i = start; i < sentences.size(); i++) {
if(quotes != "") {
if((sentences[i] == quotes[quotes.size()-1])) {
if(quotes[quotes.size()-1] == '\"') {
quotes.erase(quotes.size()-2);
continue;
} else if(quotes[quotes.size()-1] == '\'') {
if((i < sentences.size()-1) && ((sentences[i+1] == ' ') || (sentences[i+1] == '\"') || (sentences[i+1] == ','))) {
continue;
} else if(i == sentences.size()-1) {
break;
}
}
}
} else if((sentences[i] == '\'') || (sentences[i] == '\"')) {
quotes += sentences[i];
} else {
if((sentences[i] == '!') || (sentences[i] == '?')) {
place = i;
break;
} else if(sentences[i] == '.') {
string caps = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
bool acronym = false;
for(unsigned int j = 0; j < caps.size(); j++) {
if(sentences[i-1] == caps[j]) {
acronym = true;
break;
}
}
if(!acronym) {
place = i;
break;
}
}
}
/* // Check for an ending punctuation mark and double spaces
if((sentences[i+1] == '\n') || (sentences[i+1] == '\0') || ((sentences[i+1] == ' ') && (sentences[i+2] == ' '))) {
if((sentences[i] == '\"') || (sentences[i] == '\'') || (sentences[i] == '!') || (sentences[i] == '?') || (sentences[i] == '.')) {
place = i;
break;
} else {
continue;
}
}
*/ }
return place;
}
Here is the test program that calls the shared library:
#include <iostream>
#include <string>
#include <dlfcn.h>
#include "/home/student/libgramm/gramm/libgramm.h"
int main() {
using std::cout;
using std::cerr;
cout << "C++ dlopen demo\n\n";
// open the library
cout << "Opening hello.so...\n";
void* handle = dlopen("/usr/lib/libgramm.so", RTLD_LAZY);
if (!handle) {
cerr << "Cannot open library: " << dlerror() << '\n';
return 1;
}
// load the symbol
cout << "Loading symbol lg_findSentEnd...\n";
typedef void (*hello_t)();
// reset errors
dlerror();
hello_t lg_findSentEnd = (hello_t) dlsym(handle, "lg_findSentEnd");
const char *dlsym_error = dlerror();
if (dlsym_error) {
cerr << "Cannot load symbol lg_findSentEnd: " << dlsym_error << '\n';
dlclose(handle);
return 1;
}
// use it to do the calculation
cout << "Calling lg_findSentEnd...\n";
int lg_start = 1;
unsigned int pos = lg_findSentEnd("That is a lovely cake. This is a beautiful gate.", lg_start);
cout << "Position: " << pos << "\n";
// close the library
cout << "Closing library...\n";
dlclose(handle);
}
Here is the command I use to compile the test program:
g++ test.cpp -o test -lgramm
And finally, here is the error I have not been able to solve:
test.cpp: In function ‘int main()’:
test.cpp:38: error: too many arguments to function
test.cpp:38: error: void value not ignored as it ought to be
So, is there something I am missing? I manually copy libgramm.so into /usr/lib, and chown and chgrp it to student (instead of root).
Thanks in advance.
- Andruk