Textractor_test/extensions/extensions.h
2018-10-10 06:16:47 -04:00

57 lines
2.1 KiB
C++

#pragma once
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <cstdint>
#include <string>
struct InfoForExtension
{
const char* name;
int64_t value;
InfoForExtension* next;
};
struct SentenceInfo
{
const InfoForExtension* list;
// Traverse linked list to find info.
int64_t operator[](std::string propertyName)
{
for (auto i = list; i != nullptr; i = i->next) if (propertyName == i->name) return i->value;
throw;
}
};
struct InvalidSentence {};
bool ProcessSentence(std::wstring& sentence, SentenceInfo sentenceInfo);
/**
* You shouldn't mess with this or even look at it unless you're certain you know what you're doing.
* Param sentence: pointer to sentence received by Textractor (UTF-16).
* You should not modify this sentence. If you want Textractor to receive a modified sentence, copy it into your own buffer and return that.
* Please allocate the buffer using HeapAlloc() and not new[] or malloc() or something else: Textractor uses HeapFree() to free it.
* Param miscInfo: pointer to start of singly linked list containing misc info about the sentence.
* Return value: pointer to sentence Textractor takes for future processing and display. If nullptr, Textractor will destroy the sentence.
* Return 'sentence' unless you created a new sentence/buffer as mentioned above.
* Textractor will display the sentence after all extensions have had a chance to process and/or modify it.
* THIS FUNCTION MAY BE RUN SEVERAL TIMES CONCURRENTLY: PLEASE ENSURE THAT IT IS THREAD SAFE!
*/
extern "C" __declspec(dllexport) const wchar_t* OnNewSentence(const wchar_t* sentence, const InfoForExtension* miscInfo)
{
try
{
std::wstring sentenceStr(sentence);
if (ProcessSentence(sentenceStr, SentenceInfo{ miscInfo }))
{
// No need to worry about freeing this: Textractor does it for you.
wchar_t* newSentence = (wchar_t*)HeapAlloc(GetProcessHeap(), 0, (sentenceStr.size() + 1) * sizeof(wchar_t));
wcscpy_s(newSentence, sentenceStr.size() + 1, sentenceStr.c_str());
return newSentence;
}
else return sentence;
}
catch (InvalidSentence) { return nullptr; }
}