//
// 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 -- variable-length, mutable run of text, with value semantics
//
// Author           : Michael L. Brooks
// Created On       : Fri Sep 03 11:00:00 2021
// Last Modified By : Peter A. Buhr
// Last Modified On : Thu Aug 24 11:27:57 2023
// Update Count     : 89
//

#include "string.hfa"
#include "string_res.hfa"
#include <stdlib.hfa>

#pragma GCC visibility push(default)

/*
Implementation Principle: typical operation translates to the equivalent
operation on `inner`.  Exceptions are implementing new RAII pattern for value
semantics and some const-hell handling.
*/

////////////////////////////////////////////////////////
// string RAII


void ?{}( string & this ) {
    (this.inner) { malloc() };
    ?{}( *this.inner );
}

// private (not in header)
static void ?{}( string & this, string_res & src, size_t start, size_t end ) {
    (this.inner) { malloc() };
    ?{}( *this.inner, src, SHARE_EDITS, start, end );
}

void ?{}( string & this, const string & other ) {
    (this.inner) { malloc() };
    ?{}( *this.inner, *other.inner, COPY_VALUE );
}

void ?{}( string & this, string & other ) {
    ?{}( this, (const string &) other );
}

void ?{}( string & this, const char * val ) {
    (this.inner) { malloc() };
    ?{}( *this.inner, val );
}

void ?{}( string & this, const char * buffer, size_t bsize) {
    (this.inner) { malloc() };
    ?{}( *this.inner, buffer, bsize );
}

void ^?{}( string & this ) {
    ^(*this.inner){};
    free( this.inner );
    this.inner = 0p;
}

////////////////////////////////////////////////////////
// Alternate construction: request shared edits

string_WithSharedEdits ?`shareEdits( string & this ) {
    string_WithSharedEdits ret = { &this };
    return ret;
}

void ?{}( string & this, string_WithSharedEdits src ) {
    ?{}( this, *src.s->inner, 0, src.s->inner->Handle.lnth);
}

////////////////////////////////////////////////////////
// Assignment

void ?=?( string & this, const char * val ) {
    (*this.inner) = val;
}

void ?=?(string & this, const string & other) {
    (*this.inner) = (*other.inner);
}

void ?=?( string & this, char val ) {
    (*this.inner) = val;
}

string & ?=?(string & this, string & other) { //// <---- straw man change
    (*this.inner) = (*other.inner);
    return this;
}


////////////////////////////////////////////////////////
// Input-Output

ofstream & ?|?( ofstream & out, const string & this ) {
    return out | (*this.inner); // print internal string_res
}

void ?|?( ofstream & out, const string & this ) {
    (ofstream &)(out | (*this.inner)); ends( out );
}

ifstream & ?|?(ifstream & in, string & this) {
    return in | (*this.inner); // read to internal string_res
}

void ?|?( ifstream & in, string & this ) {
    (ifstream &)(in | this); ends( in );
}

void getline( ifstream & in, string & str, const char delimit = '\n' ) {
	// .---------------,
	// | | | | |...|0|0| check and guard
	// `---------------'
	enum { gwd = 256 + 2, wd = gwd - 1 };				// guarded and unguarded width
	char cstr[gwd];										// read in chunks
	bool cont = false;;

	cstr[wd] = '\0';									// guard null terminate string
	try {
		in | getline( wdi( wd, cstr ), delimit );		// must have room for string terminator
		if ( eof( in  ) ) return;						// do not change argument
	} catch( cstring_length * ) {
		cont = true;									// continue not allowed
	} finally {
		str = cstr;										// ok to initialize string
	} // try
	for ( ; cont; )  {									// overflow read ?
		cont = false;
		try {
			in | getline( wdi( wd, cstr ), delimit );	// must have room for string terminator
			if ( eof( in  ) ) return;
		} catch( cstring_length * ) {
			cont = true;								// continue not allowed
		} finally {
			str += cstr;								// build string chunk at a time
		} // try
	} // for
}

////////////////////////////////////////////////////////
// Slicing

string ?()( string & this, size_t start, size_t end ) {
    string ret = { *this.inner, start, end };
    return ret`shareEdits;
}

string ?()( string & this, size_t start ) {
    string ret = { *this.inner, start, size( this ) };
    return ret`shareEdits;
}

////////////////////////////////////////////////////////
// Comparison

bool ?==?(const string & s, const string & other) {
    return *s.inner == *other.inner;
}

bool ?!=?(const string & s, const string & other) {
    return *s.inner != *other.inner;
}

bool ?==?(const string & s, const char * other) {
    return *s.inner == other;
}

bool ?!=?(const string & s, const char * other) {
    return *s.inner != other;
}

////////////////////////////////////////////////////////
// Getter

size_t size(const string & s) {
    return size( * s.inner );
}

////////////////////////////////////////////////////////
// Concatenation

void ?+=?(string & s, char other) {
    (*s.inner) += other;
}

void ?+=?(string & s, const string & s2) {
    (*s.inner) += (*s2.inner);
}

void ?+=?(string & s, const char * other) {
    (*s.inner) += other;
}

string ?+?(const string & s, char other) {
    string ret = s;
    ret += other;
    return ret;
}

string ?+?(const string & s, const string & s2) {
    string ret = s;
    ret += s2;
    return ret;
}

string ?+?(const char * s1, const char * s2) {
    string ret = s1;
    ret += s2;
    return ret;
}

string ?+?(const string & s, const char * other) {
    string ret = s;
    ret += other;
    return ret;
}

////////////////////////////////////////////////////////
// Repetition

string ?*?(const string & s, size_t factor) {
    string ret = "";
    for (factor) ret += s;
    return ret;
}

string ?*?(char c, size_t size) {
    string ret = "";
    for ((size_t)size) ret += c;
    return ret;
}

string ?*?(const char *s, size_t factor) {
    string ss = s;
    return ss * factor;
}

////////////////////////////////////////////////////////
// Character access

char ?[?](const string & s, size_t index) {
    return (*s.inner)[index];
}

string ?[?](string & s, size_t index) {
    string ret = { *s.inner, index, index + 1 };
    return ret`shareEdits;
}

////////////////////////////////////////////////////////
// Search

bool contains(const string & s, char ch) {
    return contains( *s.inner, ch );
}

int find(const string & s, char search) {
    return find( *s.inner, search );
}

int find(const string & s, const string & search) {
    return find( *s.inner, *search.inner );
}

int find(const string & s, const char * search) {
    return find( *s.inner, search);
}

int find(const string & s, const char * search, size_t searchsize) {
    return find( *s.inner, search, searchsize);
}

int findFrom(const string & s, size_t fromPos, char search) {
    return findFrom( *s.inner, fromPos, search );
}

int findFrom(const string & s, size_t fromPos, const string & search) {
    return findFrom( *s.inner, fromPos, *search.inner );
}

int findFrom(const string & s, size_t fromPos, const char * search) {
    return findFrom( *s.inner, fromPos, search );
}

int findFrom(const string & s, size_t fromPos, const char * search, size_t searchsize) {
    return findFrom( *s.inner, fromPos, search, searchsize );
}

bool includes(const string & s, const string & search) {
    return includes( *s.inner, *search.inner );
}

bool includes(const string & s, const char * search) {
    return includes( *s.inner, search );
}

bool includes(const string & s, const char * search, size_t searchsize) {
    return includes( *s.inner, search, searchsize );
}

bool startsWith(const string & s, const string & prefix) {
    return startsWith( *s.inner, *prefix.inner );
}

bool startsWith(const string & s, const char * prefix) {
    return startsWith( *s.inner, prefix );
}

bool startsWith(const string & s, const char * prefix, size_t prefixsize) {
    return startsWith( *s.inner, prefix, prefixsize );
}

bool endsWith(const string & s, const string & suffix) {
    return endsWith( *s.inner, *suffix.inner );
}

bool endsWith(const string & s, const char * suffix) {
    return endsWith( *s.inner, suffix );
}

bool endsWith(const string & s, const char * suffix, size_t suffixsize) {
    return endsWith( *s.inner, suffix, suffixsize );
}


///////////////////////////////////////////////////////////////////////////
// charclass, include, exclude

void ?{}( charclass & this, const string & chars) {
    (this.inner) { malloc() };
    ?{}( *this.inner, *(const string_res *)chars.inner );
}

void ?{}( charclass & this, const char * chars ) {
    (this.inner) { malloc() };
    ?{}( *this.inner, chars );
}

void ?{}( charclass & this, const char * chars, size_t charssize ) {
    (this.inner) { malloc() };
    ?{}( *this.inner, chars, charssize );
}

void ^?{}( charclass & this ) {
    ^(*this.inner){};
    free( this.inner );
    this.inner = 0p;
}


int exclude(const string & s, const charclass & mask) {
    return exclude( *s.inner, *mask.inner );
}
/*
StrSlice exclude(string & s, const charclass & mask) {
}
*/

int include(const string & s, const charclass & mask) {
    return include( *s.inner, *mask.inner );
}

/*
StrSlice include(string & s, const charclass & mask) {
}
*/