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/* 
 * Copyright (C) 1996-1998 Szeredi Miklos
 * Email: mszeredi@inf.bme.hu
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version. See the file COPYING. 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#include "zxmisc.h"
#include "zxconfig.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "helpers.h"
#define DIR_SEP_CHAR '/'

char *get_base_name(char *fname)
{
  char *p;
  
  p = fname;
  for(; *p; p++);
  for(; p >= fname && *p != DIR_SEP_CHAR; p--);
  return ++p;
}


int check_ext(const char *filename, const char *ext)
{
  int flen, elen;
  int i;

  flen = (int) rb->strlen(filename);
  elen = (int) rb->strlen(ext);

  if(flen <= elen + 1) return 0;
  
  if(filename[flen-elen-1] != '.') return 0;
  for(i = 0; i < elen; i++) if(filename[flen-elen+i] != toupper(ext[i])) break;
  if(i == elen) return 1;
  for(i = 0; i < elen; i++) if(filename[flen-elen+i] != tolower(ext[i])) break;
  if(i == elen) return 1;
  return 0;
}

void add_extension(char *filename, const char *ext)
{
  int i;
  int upper;

  i = (int) rb->strlen(filename);
  if(filename[i] > 64 && filename[i] < 96) upper = 1;
  else upper = 0;
  
  filename[i++] = '.';
  if(upper)
    for(; *ext; i++, ext++) filename[i] = toupper(*ext);
  else 
    for(; *ext; i++, ext++) filename[i] = tolower(*ext);
}

int file_exist(const char *filename)
{
  /*FILE *fp;*/
  int fd;

  fd = rb->open(filename, O_RDONLY);
  if(fd >= 0) {
    rb->close(fd);
    return 1;
  }
  else return 0;
/*  if(errno == ENOENT) return 0;
  return 1;*/
}

int try_extension(char *filename, const char *ext)
{
  int tend;
  
  tend = (int) rb->strlen(filename);
  add_extension(filename, ext);
  if(file_exist(filename)) return 1;

  filename[tend] = '\0';
  return 0;
}

void *malloc_err(size_t size)
{
  char *p;

  p = (char *) my_malloc(size);
  if(p == NULL) {
   // fprintf(stderr, "Out of memory!\n");
    /*exit(1);*/
  }
  return (void *) p;
}

char *make_string(char *ostr, const char *nstr)
{
  if(ostr != NULL) /*free(ostr)*/ostr=0;
  ostr = malloc_err(rb->strlen(nstr) + 1);
  rb->strcpy(ostr, nstr);
  return ostr;
}

void free_string(char *ostr)
{
  if(ostr != NULL) /*free(ostr)*/ostr=0;
}

int mis_strcasecmp(const char *s1, const char *s2)
{
  int c1, c2;
  
  for(;; s1++, s2++) {
    c1 = tolower(*s1);
    c2 = tolower(*s2);

    if(!c1 || c1 != c2) break;
  }
  return c1-c2;
}