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#include "TextTokenizer.h"
#include "ext/ZCharScanner.h"
#include <algorithm>
#include <cassert>
#include <cctype>
#include <iostream>
const std::vector<std::string> first14 = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen" };
const std::vector<std::string> prefixes = { "twen", "thir", "for", "fif", "six", "seven", "eigh", "nine" };
// Punctuation, this gets auto-converted to SIL
const std::string punctuation = ",.-;";
using namespace std;
void TextTokenizer::SetAllowedChars(const std::string &value)
{
AllowedChars = value;
}
string TextTokenizer::IntToStr(int number)
{
if (number < 0)
{
return "minus " + IntToStr(-number);
}
if (number <= 14)
return first14.at(number);
if (number < 20)
return prefixes.at(number - 12) + "teen";
if (number < 100) {
unsigned int remainder = number - (static_cast<int>(number / 10) * 10);
return prefixes.at(number / 10 - 2) + (0 != remainder ? "ty " + IntToStr(remainder) : "ty");
}
if (number < 1000) {
unsigned int remainder = number - (static_cast<int>(number / 100) * 100);
return first14.at(number / 100) + (0 != remainder ? " hundred " + IntToStr(remainder) : " hundred");
}
if (number < 1000000) {
unsigned int thousands = static_cast<int>(number / 1000);
unsigned int remainder = number - (thousands * 1000);
return IntToStr(thousands) + (0 != remainder ? " thousand " + IntToStr(remainder) : " thousand");
}
if (number < 1000000000) {
unsigned int millions = static_cast<int>(number / 1000000);
unsigned int remainder = number - (millions * 1000000);
return IntToStr(millions) + (0 != remainder ? " million " + IntToStr(remainder) : " million");
}
throw std::out_of_range("inttostr() value too large");
}
vector<string> TextTokenizer::ExpandNumbers(const std::vector<std::string>& SpaceTokens)
{
vector<string> RetVec;
RetVec.reserve(SpaceTokens.size());
for (auto& Token : SpaceTokens) {
char* p;
long converted = strtol(Token.c_str(), &p, 10);
if (*p) {
RetVec.push_back(Token);
}
else {
if (converted > 1000000000)
continue;
string IntStr = IntToStr((int)converted);
ZStringDelimiter DelInt(IntStr);
DelInt.AddDelimiter(" ");
std::vector<std::string> NumToks = DelInt.GetTokens();
// If a number results in one word the delimiter may not add it.
if (NumToks.empty())
NumToks.push_back(IntStr);
for (const auto& NumTok : NumToks)
RetVec.push_back(NumTok);
}
}
return RetVec;
}
TextTokenizer::TextTokenizer()
{
}
TextTokenizer::~TextTokenizer()
{
}
vector<string> TextTokenizer::Tokenize(const std::string & InTxt,ETTSLanguage::Enum Language)
{
vector<string> ProcessedTokens;
ZStringDelimiter Delim(InTxt);
Delim.AddDelimiter(" ");
vector<string> DelimitedTokens = Delim.GetTokens();
// Single word handler
if (!Delim.szTokens())
DelimitedTokens.push_back(InTxt);
if (Language == ETTSLanguage::English)
DelimitedTokens = ExpandNumbers(DelimitedTokens);
// We know that the new vector is going to be at least this size so we reserve
ProcessedTokens.reserve(DelimitedTokens.size());
/*
In this step we go through the string and only allow qualified character to pass through.
*/
for (size_t TokCtr = 0; TokCtr < DelimitedTokens.size();TokCtr++)
{
const auto& tok = DelimitedTokens[TokCtr];
string AppTok = "";
if (tok.find("@") != string::npos)
{
ProcessedTokens.push_back(tok);
continue;
}
for (size_t s = 0;s < tok.size();s++)
{
if (AllowedChars.find(tok[s]) != std::string::npos)
AppTok += tok[s];
// Prevent an ending period from adding another SIL
bool LastElem = TokCtr == DelimitedTokens.size() - 1 && s == tok.size() - 1;
// Punctuation handler
// This time we explicitly add a token to the vector
if (punctuation.find(tok[s]) != string::npos && !LastElem) {
// First, if the assembled string isn't empty, we add it in its current state
// Otherwise, the SIL could end up appearing before the word.
if (!AppTok.empty()) {
ProcessedTokens.push_back(AppTok);
AppTok = "";
}
ProcessedTokens.push_back("@SIL");
}
}
if (!AppTok.empty())
ProcessedTokens.push_back(AppTok);
}
// Prevent out of range error if the user inputs one word
if (ProcessedTokens.size() > 1)
{
if (ProcessedTokens[ProcessedTokens.size() - 1] == "SIL")
ProcessedTokens.pop_back();
}
return ProcessedTokens;
}
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