prompt.c

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

/* If we are compiling on Windows compile these functions */
#ifdef _WIN32
#include <string.h>

static char buffer[2048];

/* Fake readline function */
char* readline(char* prompt) {
  fputs(prompt, stdout);
  fgets(buffer, 2048, stdin);
  char* cpy = malloc(strlen(buffer)+1);
  strcpy(cpy, buffer);
  cpy[strlen(cpy)-1] = '\0';
  return cpy;
}

/* Fake add_history function */
void add_history(char* unused) {}

/* Otherwise include the editline headers */
#else
#include <editline/readline.h>
#include <editline/history.h>
#endif

int main(int argc, char** argv) {
   
  puts("KoalaLisp Version 0.0.0.0.1");
  puts("Press Ctrl+c to Exit the program\n");
   
  while (1) {
    
    /* Now in either case readline will be correctly defined */
    char* input = readline("koala> ");
    add_history(input);

    printf("You wrote %s\n", input);
    free(input);
    
  }
  
  return 0;
}