I made this because I needed an easy way to split strings and c-based strings... Hopefully someone else can find it useful as well. Also it doesn't rely on tokens and you can use fields as delimiters, which is another key I needed.

I'm sure there's improvements that can be made to even further improve its elegance and please do by all means

StringSplitter.hpp:

#include <vector> #include <iostream> #include <string.h> using namespace std; class StringSplit { private: void copy_fragment(char*, char*, char*); void copy_fragment(char*, char*, char); bool match_fragment(char*, char*, int); int untilnextdelim(char*, char); int untilnextdelim(char*, char*); void assimilate(char*, char); void assimilate(char*, char*); bool string_contains(char*, char*); long calc_string_size(char*); void copy_string(char*, char*); public: vector<char*> split_cstr(char); vector<char*> split_cstr(char*); vector<string> split_string(char); vector<string> split_string(char*); char* String; bool do_string; bool keep_empty; vector<char*> Container; vector<string> ContainerS; StringSplit(char * in) { String = in; } StringSplit(string in) { size_t len = calc_string_size((char*)in.c_str()); String = new char[len + 1]; memset(String, 0, len + 1); copy_string(String, (char*)in.c_str()); do_string = true; } ~StringSplit() { for (int i = 0; i < Container.size(); i++) { if (Container[i] != NULL) { delete[] Container[i]; } } if (do_string) { delete[] String; } } };

StringSplitter.cpp:

#include <string.h> #include <iostream> #include <vector> #include "StringSplit.hpp" using namespace std; void StringSplit::assimilate(char*src, char delim) { int until = untilnextdelim(src, delim); if (until > 0) { char * temp = new char[until + 1]; memset(temp, 0, until + 1); copy_fragment(temp, src, delim); if (keep_empty || *temp != 0) { if (!do_string) { Container.push_back(temp); } else { string x = temp; ContainerS.push_back(x); } } else { delete[] temp; } } } void StringSplit::assimilate(char*src, char* delim) { int until = untilnextdelim(src, delim); if (until > 0) { char * temp = new char[until + 1]; memset(temp, 0, until + 1); copy_fragment(temp, src, delim); if (keep_empty || *temp != 0) { if (!do_string) { Container.push_back(temp); } else { string x = temp; ContainerS.push_back(x); } } else { delete[] temp; } } } long StringSplit::calc_string_size(char* _in) { long i = 0; while (*_in++) { i++; } return i; } bool StringSplit::string_contains(char* haystack, char* needle) { size_t len = calc_string_size(needle); size_t lenh = calc_string_size(haystack); while (lenh--) { if (match_fragment(haystack + lenh, needle, len)) { return true; } } return false; } bool StringSplit::match_fragment(char* _src, char* cmp, int len) { while (len--) { if (*(_src + len) != *(cmp + len)) { return false; } } return true; } int StringSplit::untilnextdelim(char* _in, char delim) { size_t len = calc_string_size(_in); if (*_in == delim) { _in += 1; return len - 1; } int c = 0; while (*(_in + c) != delim && c < len) { c++; } return c; } int StringSplit::untilnextdelim(char* _in, char* delim) { int s = calc_string_size(delim); int c = 1 + s; if (!string_contains(_in, delim)) { return calc_string_size(_in); } else if (match_fragment(_in, delim, s)) { _in += s; return calc_string_size(_in); } while (!match_fragment(_in + c, delim, s)) { c++; } return c; } void StringSplit::copy_fragment(char* dest, char* src, char delim) { if (*src == delim) { src++; } int c = 0; while (*(src + c) != delim && *(src + c)) { *(dest + c) = *(src + c); c++; } *(dest + c) = 0; } void StringSplit::copy_string(char* dest, char* src) { int i = 0; while (*(src + i)) { *(dest + i) = *(src + i); i++; } } void StringSplit::copy_fragment(char* dest, char* src, char* delim) { size_t len = calc_string_size(delim); size_t lens = calc_string_size(src); if (match_fragment(src, delim, len)) { src += len; lens -= len; } int c = 0; while (!match_fragment(src + c, delim, len) && (c < lens)) { *(dest + c) = *(src + c); c++; } *(dest + c) = 0; } vector<char*> StringSplit::split_cstr(char Delimiter) { int i = 0; while (*String) { if (*String != Delimiter && i == 0) { assimilate(String, Delimiter); } if (*String == Delimiter) { assimilate(String, Delimiter); } i++; String++; } String -= i; delete[] String; return Container; } vector<string> StringSplit::split_string(char Delimiter) { do_string = true; int i = 0; while (*String) { if (*String != Delimiter && i == 0) { assimilate(String, Delimiter); } if (*String == Delimiter) { assimilate(String, Delimiter); } i++; String++; } String -= i; delete[] String; return ContainerS; } vector<char*> StringSplit::split_cstr(char* Delimiter) { int i = 0; size_t LenDelim = calc_string_size(Delimiter); while(*String) { if (!match_fragment(String, Delimiter, LenDelim) && i == 0) { assimilate(String, Delimiter); } if (match_fragment(String, Delimiter, LenDelim)) { assimilate(String,Delimiter); } i++; String++; } String -= i; delete[] String; return Container; } vector<string> StringSplit::split_string(char* Delimiter) { do_string = true; int i = 0; size_t LenDelim = calc_string_size(Delimiter); while (*String) { if (!match_fragment(String, Delimiter, LenDelim) && i == 0) { assimilate(String, Delimiter); } if (match_fragment(String, Delimiter, LenDelim)) { assimilate(String, Delimiter); } i++; String++; } String -= i; delete[] String; return ContainerS; }

Examples:

int main(int argc, char*argv[]) { StringSplit ss = "This:CUT:is:CUT:an:CUT:example:CUT:cstring"; vector<char*> Split = ss.split_cstr(":CUT:"); for (int i = 0; i < Split.size(); i++) { cout << Split[i] << endl; } return 0; }

Will output:

This

is

an

example

cstring



int main(int argc, char*argv[]) { StringSplit ss = "This:is:an:example:cstring"; vector<char*> Split = ss.split_cstr(':'); for (int i = 0; i < Split.size(); i++) { cout << Split[i] << endl; } return 0; } int main(int argc, char*argv[]) { string mystring = "This[SPLIT]is[SPLIT]an[SPLIT]example[SPLIT]string"; StringSplit ss = mystring; vector<string> Split = ss.split_string("[SPLIT]"); for (int i = 0; i < Split.size(); i++) { cout << Split[i] << endl; } return 0; } int main(int argc, char*argv[]) { string mystring = "This|is|an|example|string"; StringSplit ss = mystring; vector<string> Split = ss.split_string('|'); for (int i = 0; i < Split.size(); i++) { cout << Split[i] << endl; } return 0; }

To keep empty entries (by default empties will be excluded):

StringSplit ss = mystring; ss.keep_empty = true; vector<string> Split = ss.split_string(":DELIM:");

The goal was to make it similar to C#'s Split() method where splitting a string is as easy as:

String[] Split = "Hey:cut:what's:cut:your:cut:name?".Split(new[]{":cut:"}, StringSplitOptions.None); foreach(String X in Split) { Console.Write(X); }

I hope someone else can find this as useful as I do.