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#include <stdlib.h>
#include "buf.h"
int max(int a, int b){
if (a > b) return a;
return b;
}
int min(int a, int b){
if (a < b) return a;
return b;
}
struct buf_node{
char* text;
size_t space;
struct buf_node* next;
struct buf_node* prev;
};
struct buf{
buf_node* head;
buf_node* tail;
size_t cap;
};
buf* newbuf(size_t cap){
buf* buffer = malloc(sizeof(buf));
buffer->cap = cap;
buffer->tail = buffer->head = newbufnode(cap);
return buffer;
}
buf_node* newbufnode(size_t cap){
buf_node* bufnode = calloc(sizeof(buf_node));
bufnode->text = malloc(sizeof(char)*cap);
return bufnode;
}
void bextendbuf(buf* buffer){
buffer->tail = buffer->tail->prev->next
= buffer->tail->prev = newbufnode();
}
void fextendbuf(buf* buffer){
buffer->head = buffer->head->next->prev
= buffer->head->next = newbufnode();
}
void addchrbuf(buf* buffer, char chr){ // front
buf_node* head = buffer->head
if (head->space < 0 || head->space == buffer->cap)
fextendbuf(buffer);
*(head->text + head->space) = chr;
head->space++;
}
void addstrbuf(buf* buffer, char* str){
}
char remchrbuf(buf* buffer){
}
char* remchrbuf(buf* buffer, int ct){
}
void prechrbuf(buf* buffer, char chr){ // back
}
void prestrbuf(buf* buffer, char* str){
}
char shfchrbuf(buf* buffer){
}
char* shfstrbuf(buf* buffer, int ct){
}
char* strpeekbuf(buf* buffer, int loc, int len){
}
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