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Add find_tag()

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This simply finds a given tag in a buffer and returns what's inside that
tag, making sure to parse XML entities and such.
This commit is contained in:
Misa 2020-04-17 14:56:38 -07:00 committed by Ethan Lee
parent 9b4975e396
commit b4f56d39d7
1 changed files with 51 additions and 0 deletions
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51
desktop_version/src/editor.cpp
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@ -102,6 +102,57 @@ void replace_all(std::string& str, const std::string& from, const std::string& t
}
}
std::string find_tag(const std::string& buf, const std::string& start, const std::string& end)
{
size_t tag = buf.find(start);
if (tag == std::string::npos)
{
//No start tag
return "";
}
size_t tag_start = tag + start.size();
size_t tag_close = buf.find(end, tag_start);
if (tag_close == std::string::npos)
{
//No close tag
return "";
}
size_t tag_len = tag_close - tag_start;
std::string value(buf.substr(tag_start, tag_len));
//Encode special XML entities
replace_all(value, """, "\"");
replace_all(value, "&", "&");
replace_all(value, "'", "'");
replace_all(value, "&lt;", "<");
replace_all(value, "&gt;", ">");
//Encode general XML entities
size_t start_pos = 0;
while ((start_pos = value.find("&#", start_pos)) != std::string::npos)
{
size_t end = value.find(';', start_pos);
std::string number(value.substr(start_pos + 2, end - start_pos));
if (!is_positive_num(number))
{
return "";
}
int character = atoi(number.c_str());
int utf32[] = {character, 0};
std::string utf8;
utf8::unchecked::utf32to8(utf32, utf32 + 1, std::back_inserter(utf8));
value.replace(start_pos, end - start_pos + 1, utf8);
}
return value;
}
void editorclass::getDirectoryData()
{