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// -*- coding: utf-8 -*-

%{

/* inclusions, définition */

#include <string>

#include <stdlib.h>

#include <stdio.h>

#include <unistd.h>

#include <math.h>

#include "chemeq.h"

  //#include <FlexLexer.h>

#include <sstream>

  int yylex();

  int yyerror(char * msg);

typedef struct{

  int i, d; /* integer numerator, denominator */

  double r;

  AtomeListe * al;

  Molec * m;

  Chemeq * cq;

  Membre * mb;

  char symb[4];

  moltype t;

  std::string s;

} yystype;

#define YYSTYPE yystype 

/* variables globales */

 yystype result;

 extern char * yytext;

 extern int position;

 int isequation;

%}

%token Atome

%token SpcPlus

%token Plus

%token Moins

%token Mul

%token Fleche

%token Int

%token Charge

%token Frac

%token Real

%token SpcLpar

%token Lpar

%token Rpar

%token Lsq

%token Rsq

%token Haut

%token Spc

%token Sol

%token Gas

%token Aqueous

%token Egal

%token Compose

%token AntiCompose

%%

/* les règles */

but : chcompose { 

  result=$1;

  isequation=1;

}

| molec {

  result=$1;

  isequation=0;

}

;

chcompose : chc {$$=$1;}

| chcompose spc01 Compose spc01 chc {

  $1.cq->addChemeq($5.cq);

  $$=$1;

}

| chcompose spc01 AntiCompose spc01 chc { 

  $1.cq->subChemeq($5.cq);

  $$=$1;

}

;

chc : chemeq cste{

  $$=$1;

  $$.cq->constante($2.s);

  $$.cq->valeur($2.r);

}

| Frac spc01 Mul spc01 chc {

  $$.cq = $5.cq; $$.cq->multiply($1.i,$1.d);

}

| Int spc01 Mul spc01 chc {

  $$.cq = $5.cq; $$.cq->multiply($1.i,1);

}

;

cste : /* rien */ {$$.s = ""; $$.r = MINVAL; /* valeur négative : non défini */}

| SpcLpar cste1 Rpar {$$ = $2;}

;

cste1 : spc01 nombre volt{$$.s = ""; $$.r = $2.r;}

| spc01 id spc01 Egal spc01 nombre volt{$$.s = $2.s; $$.r = $6.r;}

;

nombre : Real {$$.r=$1.r;}

| Int {$$.r=1.0*$1.i;}

| Plus spc01 Real{$$.r=$3.r;}

| Moins spc01 Real{$$.r=-$3.r;}

| Plus spc01 Int{$$.r=1.0*$3.i;}

| Moins spc01 Int{$$.r=-1.0*$3.i;}

;

volt : /* rien */

| spc01 Atome {if ($2.s.compare("V")!=0) yyerror (strdup("only 'V' allowed as unit")); }

;

id : Atome {/* $$.s contient le nom */}

;

chemeq : membre Spc Fleche spc01 membre{

  $$.cq = new Chemeq($1.mb,$5.mb);

}

;

membre : membre SpcPlus spc01 molecs {

  $$.mb->addMol($4.m);

}

| molecs {

  $$.mb = new Membre;

  $$.mb->push_back($1.m);

}

;

molecs : Int spc01 molec {

  $$ = $3;

  $$.m->nombre($1.i);

}

| Frac spc01 molec {

  $$ = $3;

  $$.m->nombre($1.i,$1.d);

}

| molec{

  $$ = $1; 

}

;

spc01 : /*rien*/

| Spc

;

molec : composition0 typage{

  $$.m = new Molec($1.al,0); $$.m->typage($2.t);

}

| composition0 charge typage{

  $$.m = new Molec($1.al,$2.i);$$.m->typage($3.t);

}

;

composition0 : composition {$$.al=$1.al;}

| Lsq spc01 composition spc01 Rsq {$$.al=$3.al; $$.al->sq(1);}

;

typage : /* rien */ {$$.t = aqueous;}

| Aqueous {$$.t = aqueous;}

| Sol {$$.t = sol;}

| Gas {$$.t = gas;}

;

charge : Plus {$$.i=1;}

| Haut Plus {$$.i=1;}

| Haut Charge {$$.i=$2.i;}

| Moins{$$.i=-1;}

| Haut  Moins{$$.i=-1;}

;

groupe : Lpar composition Rpar {

  $$=$2; 

}

;

atome_general : groupe {

  $$.al = new AtomeListe("",0,0,$1.al);

}

| Atome{

  char buffer[25];

  if ($1.i==-2) { /* ce n'est pas un atome recensé */

    sprintf(buffer,"nonexistent atom : %s", $1.symb);

    yyerror(buffer);

  }

  $$.al = new AtomeListe($1.symb,$1.i);

}

;

composition : atome_general molecularite composition {

  $$ = $1;

  $$.al->setmolecularite($2.i);

  $$.al->setsuivant($3.al);

}

| atome_general molecularite{

  $$.al = $1.al;

  $$.al->setmolecularite($2.i);

}

;

molecularite : /*rien*/{

  $$.i=1;

}

| Int {

  $$=$1; 

}

;

%%

#include "chemlex.cc"

yyFlexLexer lexer;

yyFlexLexer * thelexer = &lexer;

int yylex(){

  return thelexer->yylex();

}

/* le programme lui-même */

inline int yyerror(char * msg){

  fprintf(stderr, "ERROR %s at %d\n ", msg, position);

  exit(1);

}

void printVersion(){

  std::cout << "Chemeq version " << VERSION << "\n(c) Georges Khaznadar <georgesk@debian.org>.";

  std::cout << "\nThis program is free, licensed under G.P.L.\n";

}

void printHelp(){

  std::cout << "Usage : chemeq [-m] [-l] [-c] [-w] [-C] [-n] [-e] [-s] [-v] [-h]" << std::endl;

  std::cout << "        default is equivalent to 'chemeq -mlcwCn'" << std::endl;

  std::cout << "        chemeq reads its standard input which must be a standard" << std::endl;

  std::cout << "        chemical equation. It outputs many strings useful for chemical" << std::endl;

  std::cout << "        calculations." << std::endl;

  std::cout << "        As an example you can try the following command :" << std::endl;

  std::cout << "        echo \"Fes -> Fe^2+ + 2 e- (0.44 V)\" | chemeq" << std::endl;

}

#define maxoption 16

void optionadd(char* b, char* allowed, int c);

void optionadd(char* b, char* allowed, int c){

  if (strchr(allowed,c) && !strchr(b,c) && strlen(b) < maxoption+1){

    int l = strlen(b);

    b[l]=c; b[l+1]=0;

  }

  return;

}

int main(int argc, char * argv[]){

  char * optstr = strdup("mMlcCwnesvh");

  char * envoption=getenv("chemeq_option");

  if (envoption==NULL) envoption=getenv("w_chemeq_option");

  char * envinput =getenv("chemeq_input");

  if (envinput==NULL) envinput=getenv("w_chemeq_input");

  char asked[maxoption+1]="";

  int i,ch;

  bool nooption=1;

  std::ostringstream w;

  while (-1 != (ch=getopt(argc,argv,optstr))){

    optionadd(asked,optstr,ch);

  }

  if (envoption!=NULL) for(i=0; i<strlen(envoption); i++){

    optionadd(asked, optstr, envoption[i]);

  }

  if (strchr(asked,'h')!=NULL){

    printHelp(); return 0;

  }

  if (strchr(asked,'v')!=NULL){

    printVersion(); return 0;

  }

  if (envinput !=NULL){

    std::istringstream iss(envinput);

    thelexer= new yyFlexLexer (&iss);

  } 

  yyparse();

  bool wantedlatex=(strchr(asked,'l')!=NULL);

  if (isequation) {

    for(i=0; i<strlen(asked); i++){

      switch(asked[i]){

      case 'm': nooption=0;

	result.cq->printnorm(std::cout); std::cout << std::endl;

	break;

      case 'M': nooption=0;

	result.cq->printweight(std::cout);

	std::cout <<  std::endl;

	break;

      case 'l': nooption=0;

	std::cout << *result.cq << std::endl;

	break;

      case 'c': nooption=0;

	std::cout << result.cq->equilibre() << std::endl;

	break;

      case 'w': nooption=0;

	result.cq->printNernst(std::cout,w,wantedlatex); std::cout << std::endl;

	std::cout << w.str() << std::endl;

	break;

      case 'n': nooption=0;

	result.cq->normalise();

	result.cq->printnorm(std::cout); std::cout << std::endl;

	break;

      case 'C': nooption=0;

	result.cq->printcount(std::cout); std::cout << std::endl;

	break;

      case 'e': nooption=0;

	result.cq->printelec(std::cout); std::cout << std::endl;

	break;

      case 's': nooption=0;

	result.cq->printspecies(std::cout); std::cout << std::endl;

	break;

      }

    }

    if (nooption){

      result.cq->printnorm(std::cout); std::cout << std::endl;

      std::cout << *result.cq << std::endl;

      std::cout << result.cq->equilibre() << std::endl;

      result.cq->printNernst(std::cout,w); std::cout << std::endl;

      result.cq->printcount(std::cout); std::cout << std::endl;

      result.cq->normalise();

      result.cq->printnorm(std::cout); std::cout << std::endl;

    }

  }

  else { /* ce n'est pas une équation */

    for(i=0; i<strlen(asked); i++){

      switch(asked[i]){

      case 'M': nooption=0;

	std::cout << result.m->weight();

	std::cout <<  std::endl;

	break;

      }

    }

    if (nooption){

      std::cout << *result.m;

    }

  }

  return 0;

}