#include <stdio.h>
#include <stdlib.h>
#include "str.h"
STR* newstr(void){
  STR *newstr;
  SLIST *newlist;
  newlist=(SLIST*)malloc(sizeof(SLIST));
  if(newlist==NULL){
    return NULL;
  }
  newstr=(STR*)malloc(sizeof(STR));
  if(newstr==NULL){
    free(newlist);
    return NULL;
  }
  newlist->next=NULL;
  newstr->begin=newstr->end=newlist;
  newstr->size=0;
  return newstr;
}
int addchar(STR *s, char c){
  SLIST *newlist;
  newlist = (SLIST*) malloc(sizeof(SLIST));
  if(newlist==NULL){return 0;}
  s->size++;
  newlist->next=NULL;
  s->end->moji=c;
  s->end->next=newlist;
  s->end=newlist;
  return 1;
}
int strsize(STR *s){
    return s->size;
}
int addchararray(STR *s,char *c){
    for (;*c != '\0'; c++) {
        if (addchar(s, *c) == 0) {
            return 0;
        }
    }
    return 1;
}
void appendstr(STR *s, STR *t){
    s->end->moji = t->begin->moji;
    s->end->next = t->begin->next;
    s->end = t->end;
    s->size += t->size;
    free(t->begin);
    free(t);
}
int fputstr(FILE *fh, STR *s){
    SLIST *p;
    for(p = s->begin; p->next != NULL; p = p->next)
        fputc(p->moji, fh);
    return s->size;
}