File size: 4,418 Bytes
d1be154 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 | #include <ot/utility/tokenizer.hpp>
// TODO
// 1. Consider removing the utf-8 bom (https://github.com/zer4tul/utf8-bom-strip)
namespace ot {
// Function: to_lower
std::string to_lower(std::string s) {
std::transform(s.begin(), s.end(), s.begin(), [] (auto c) {
return std::tolower(c);
});
return s;
}
// Function: to_upper
std::string to_upper(std::string s) {
std::transform(s.begin(), s.end(), s.begin(), [] (auto c) {
return std::toupper(c);
});
return s;
}
// Functon : remove_quote
std::string remove_quote(std::string s) {
s.erase(std::remove( s.begin(), s.end(), '\"'), s.end());
return s;
}
// Function: unquoted
std::string unquoted(std::string s) {
if(s.size() >= 2 && s.front() == '\"' && s.back() == '\"') {
return s.substr(1, s.size() - 2);
}
else return s;
}
// Function: is_numeric
bool is_numeric(const std::string& token) {
return std::regex_match(token, std::regex("(\\+|-)?[0-9]*(\\.?([0-9]+))$"));
}
// Function: is_array
bool is_array(const std::string& token) {
return std::regex_match(token, std::regex("[a-zA-Z_][a-zA-Z_0-9]*(\\[[0-9]+\\])+"));
}
// Function: is_word
bool is_word(const std::string& token) {
return std::regex_match(token, std::regex("[a-zA-Z_][a-zA-Z_0-9]*"));
}
// ------------------------------------------------------------------------------------------------
// Function: tokenize
std::vector<std::string> split(const std::string& str, std::string_view dels) {
// Parse the token.
std::string token;
std::vector<std::string> tokens;
for(size_t i=0; i<str.size(); ++i) {
bool is_del = (dels.find(str[i]) != std::string_view::npos);
if(is_del || std::isspace(str[i])) {
if(!token.empty()) { // Add the current token.
tokens.push_back(std::move(token));
}
} else {
token.push_back(str[i]); // Add the char to the current token.
}
}
if(!token.empty()) {
tokens.push_back(std::move(token));
}
return tokens;
}
//-------------------------------------------------------------------------------------------------
// Function: tokenize:
std::vector<std::string> tokenize(
const std::filesystem::path& path,
std::string_view dels,
std::string_view exps
) {
using namespace std::literals::string_literals;
std::ifstream ifs(path, std::ios::ate);
if(!ifs.good()) {
//throw std::invalid_argument("failed to open the file '"s + path.c_str() + '\'');
return {};
}
// Read the file to a local buffer.
size_t fsize = ifs.tellg();
ifs.seekg(0, std::ios::beg);
std::vector<char> buffer(fsize + 1);
ifs.read(buffer.data(), fsize);
buffer[fsize] = 0;
// Mart out the comment
for(size_t i=0; i<fsize; ++i) {
// Block comment
if(buffer[i] == '/' && buffer[i+1] == '*') {
buffer[i] = buffer[i+1] = ' ';
for(i=i+2; i<fsize; buffer[i++]=' ') {
if(buffer[i] == '*' && buffer[i+1] == '/') {
buffer[i] = buffer[i+1] = ' ';
i = i+1;
break;
}
}
}
// Line comment
if(buffer[i] == '/' && buffer[i+1] == '/') {
buffer[i] = buffer[i+1] = ' ';
for(i=i+2; i<fsize; ++i) {
if(buffer[i] == '\n' || buffer[i] == '\r') {
break;
}
else buffer[i] = ' ';
}
}
// Pond comment
if(buffer[i] == '#') {
buffer[i] = ' ';
for(i=i+1; i<fsize; ++i) {
if(buffer[i] == '\n' || buffer[i] == '\r') {
break;
}
else buffer[i] = ' ';
}
}
}
//std::cout << std::string_view(buffer.data()) << std::endl;
// Parse the token.
std::string token;
std::vector<std::string> tokens;
for(size_t i=0; i<fsize; ++i) {
auto c = buffer[i];
bool is_del = (dels.find(c) != std::string_view::npos);
if(is_del || std::isspace(c)) {
if(!token.empty()) { // Add the current token.
tokens.push_back(std::move(token));
token.clear();
}
if(is_del && exps.find(c) != std::string_view::npos) {
token.push_back(c);
tokens.push_back(std::move(token));
}
} else {
token.push_back(c); // Add the char to the current token.
}
}
if(!token.empty()) {
tokens.push_back(std::move(token));
}
return tokens;
}
}; // end of namespace ot. -----------------------------------------------------------------------
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