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

#include "exception_t.h"

exception_t*
exception_init() {
  exception_t *e = (exception_t*) malloc(sizeof(exception_t));
  e->type = NO_ERROR;
  e->msg = malloc(CHAR_MAX);
  return e;
}

void
exception_free(exception_t *e) {
  free(e->msg);
  free(e);
}

int
exception_null(const exception_t *e) {
  return e->type == NO_ERROR;
}

char*
exception_prestr(const exception_t *e) {
  switch(e->type) {
  case NO_ERROR: return "No error\n";
  case NO_FILE: return "No file found";
  case XML_FILE_MISSING: return "XML file missing";
  case XML_READ_FILE_FAIL: return "XML file reading failed";
  case MD5SUM_GEN_FAIL: return "MD5sum generation failed";
  case MD5SUM_VERIFY_FAIL: return "MD5sum verification failed";
  }
}

char*
exception_str(const exception_t *e, char* msg) {
  if (e->type != NO_ERROR) sprintf(msg, "%s: %s\n", exception_prestr(e), e->msg);
  else sprintf(msg, "%s\n", exception_prestr(e));
  return msg;
}