#include <stdio.h>
#include "functions.h"

int saisie(int min,int max){
     int n;
    do{scanf("%d",&n);
    }while(n<min || n>max);
    return n;
}

int ctoi(char c){
  if(c>'9' || c<'0')
    return -1;
  return c-'0';
}

void clear(){
#ifdef WIN32
    system("cls");
#else
    #ifdef UNIX
        system("clear");
    #else
    for(int i=0;i<30;i++)printf("\n");
    #endif
#endif
}

void pause(){
    getchar();
    printf("tapez la touche entree");
    fflush(stdout);
    while(getchar()!='\n');
}



//stringLIFO
stringLIFO init_stringLIFO(){return NULL;}

int is_emptyLIFO(stringLIFO list){return list==NULL;}

void delete_LIFO(stringLIFO*list){
  while(!is_emptyLIFO(*list))
    free(pop(list));
}

string top(stringLIFO list){return is_emptyLIFO(list)?NULL:list->val;}

void push(stringLIFO *list,string s){
  cell*c=malloc(sizeof(cell));
  c->val=calloc((strlen(s)+1),sizeof(char));
  strcpy(c->val,s);
  c->next=*list;
  *list=c;
}

string pop(stringLIFO*list){
  string ret=NULL;
  if(!is_emptyLIFO(*list)){
    cell*c=(*list)->next;
    ret=(*list)->val;
    free(*list);
    *list=c;
  }
  return ret;
}