How can I decode HTML entities in C++?

Question

How can I decode HTML entities in C++?

For example:

HTML: "Music" & "video"

Decoded: "Music" & "video"

Thanks.

Answer 1

If you're comfortable with using C-strings, you might be interested in my answer to a similar question.

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There's no need to compile the code as C++: compile entities.c as -std=c99 and link the object file with your C++ code, eg if you have the follwing example program foo.cpp

#include <iostream>

extern "C" size_t decode_html_entities_utf8(char *dest, const char *src);

int main()
{
    char line[100];
    std::cout << "Enter encoded line: ";
    std::cin.getline(line, sizeof line);
    decode_html_entities_utf8(line, 0);
    std::cout << line;
    return 0;
}

use

g++ -o foo foo.cpp entities.o

Answer 2

Thanks for that quick answer, but I got this error:

$ gcc -c entities.c -std=c99

entities.c: In function ‘parse_entity’:

entities.c:328: error: ‘errno’ undeclared (first use in this function)

entities.c:328: error: (Each undeclared identifier is reported only once

entities.c:328: error: for each function it appears in.)

That I solve adding int errno; in the line 324. Now I'm going to try it.