c语言readline的实现

#include <stdlib.h>
#include <stdio.h>

char* readline(FILE* f)
{
    char* line = (char*) calloc(1, sizeof(char) );;
    char c;
    int len = 0;
   
    while ( (c = fgetc(f) ) != EOF && c != '/n')
    {
        line = (char*) realloc(line, sizeof(char) * (len + 2) );
        line[len++] = c;
        line[len] = '/0';
    }

    return line;
}