//
// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// string_res -- variable-length, mutable run of text, with resource semantics
//
// Author           : Michael L. Brooks
// Created On       : Fri Sep 03 11:00:00 2021
// Last Modified By : Michael L. Brooks
// Last Modified On : Fri Sep 03 11:00:00 2021
// Update Count     : 1
//

#pragma once

#include <fstream.hfa>

    
//######################### HandleNode #########################
//private

struct VbyteHeap;

struct HandleNode {
    HandleNode *flink;					// forward link
    HandleNode *blink;					// backward link

    char *s;						// pointer to byte string
    unsigned int lnth;					// length of byte string
}; // HandleNode

void ?{}( HandleNode & );			// constructor for header node

void ?{}( HandleNode &, VbyteHeap & );		// constructor for nodes in the handle list
void ^?{}( HandleNode & );			// destructor for handle nodes


//######################### String #########################

// A dynamically-sized string
struct string_res {
    HandleNode Handle; // chars, start, end, global neighbours
    string_res * shareEditSet_prev;
    string_res * shareEditSet_next;
};


//######################### charclass_res #########################

struct charclass_res {
    string_res chars;
};

void ?{}( charclass_res & ) = void;
void ?{}( charclass_res &, charclass_res) = void;
charclass_res ?=?( charclass_res &, charclass_res) = void;
void ?{}( charclass_res &, const string_res & chars);
void ?{}( charclass_res &, const char * chars );
void ?{}( charclass_res &, const char * chars, size_t charssize );
void ^?{}( charclass_res & );


//######################### String #########################

// Getters
size_t size(const string_res &s);

// Constructors, Assignment Operators, Destructor
void ?{}(string_res &s); // empty string
void ?{}(string_res &s, const char* initial); // copy from string literal (NULL-terminated)
void ?{}(string_res &s, const char* buffer, size_t bsize); // copy specific length from buffer

void ?{}(string_res &s, const string_res & s2) = void;
void ?{}(string_res &s, string_res & s2) = void;

enum StrResInitMode { COPY_VALUE, SHARE_EDITS };
void ?{}(string_res &s, const string_res & src, StrResInitMode, size_t start, size_t end );
static inline void ?{}(string_res &s, const string_res & src, StrResInitMode mode ) {
    ?{}( s, src, mode, 0, size(src));
}

void assign(string_res &s, const char* buffer, size_t bsize); // copy specific length from buffer
void ?=?(string_res &s, const char* other); // copy from string literal (NULL-terminated)
void ?=?(string_res &s, const string_res &other);
void ?=?(string_res &s, string_res &other);
void ?=?(string_res &s, char other);

void ^?{}(string_res &s);

// IO Operator
ofstream & ?|?(ofstream &out, const string_res &s);
void ?|?(ofstream &out, const string_res &s);

// Concatenation
void ?+=?(string_res &s, char other); // append a character
void ?+=?(string_res &s, const string_res &s2); // append-concatenate to first string
void ?+=?(string_res &s, const char* other);
void append(string_res &s, const char* buffer, size_t bsize);

// Character access
char ?[?](const string_res &s, size_t index); // Mike changed to ret by val from Sunjay's ref, to match Peter's
//char codePointAt(const string_res &s, size_t index); // revisit under Unicode

// Comparisons
bool ?==?(const string_res &s, const string_res &other);
bool ?!=?(const string_res &s, const string_res &other);
bool ?==?(const string_res &s, const char* other);
bool ?!=?(const string_res &s, const char* other);

// String search
bool contains(const string_res &s, char ch); // single character

int find(const string_res &s, char search);
int find(const string_res &s, const string_res &search);
int find(const string_res &s, const char* search);
int find(const string_res &s, const char* search, size_t searchsize);

bool includes(const string_res &s, const string_res &search);
bool includes(const string_res &s, const char* search);
bool includes(const string_res &s, const char* search, size_t searchsize);

bool startsWith(const string_res &s, const string_res &prefix);
bool startsWith(const string_res &s, const char* prefix);
bool startsWith(const string_res &s, const char* prefix, size_t prefixsize);

bool endsWith(const string_res &s, const string_res &suffix);
bool endsWith(const string_res &s, const char* suffix);
bool endsWith(const string_res &s, const char* suffix, size_t suffixsize);

int include(const string_res &s, const charclass_res &mask);
int exclude(const string_res &s, const charclass_res &mask);

// Modifiers
void padStart(string_res &s, size_t n);
void padStart(string_res &s, size_t n, char padding);
void padEnd(string_res &s, size_t n);
void padEnd(string_res &s, size_t n, char padding);