www.pudn.com > UIP09_ADSP-BF537_Blackfin_org.zip > fs.c

/** 
 * \addtogroup httpd 
 * @{ 
 */ 
 
/** 
 * \file 
 * HTTP server read-only file system code. 
 * \author Adam Dunkels  
 * 
 * A simple read-only filesystem.  
 */ 
  
/* 
 * Copyright (c) 2001, Swedish Institute of Computer Science. 
 * All rights reserved.  
 * 
 * Redistribution and use in source and binary forms, with or without  
 * modification, are permitted provided that the following conditions  
 * are met:  
 * 1. Redistributions of source code must retain the above copyright  
 *    notice, this list of conditions and the following disclaimer.  
 * 2. Redistributions in binary form must reproduce the above copyright  
 *    notice, this list of conditions and the following disclaimer in the  
 *    documentation and/or other materials provided with the distribution.  
 * 3. Neither the name of the Institute nor the names of its contributors  
 *    may be used to endorse or promote products derived from this software  
 *    without specific prior written permission.  
 * 
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND  
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE  
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE  
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE  
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL  
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS  
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)  
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT  
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY  
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF  
 * SUCH DAMAGE.  
 * 
 * This file is part of the lwIP TCP/IP stack. 
 *  
 * Author: Adam Dunkels  
 * 
 * $Id: fs.c,v 1.7.2.3 2003/10/07 13:22:27 adam Exp $ 
 */ 
 
#include "uip.h" 
#include "httpd.h" 
#include "fs.h" 
#include "fsdata.h" 
 
#define NULL (void *)0 
#include "fsdata.c" 
 
#ifdef FS_STATISTICS 
#if FS_STATISTICS == 1 
static u16_t count[FS_NUMFILES]; 
#endif /* FS_STATISTICS */ 
#endif /* FS_STATISTICS */ 
 
/*-----------------------------------------------------------------------------------*/ 
static u8_t 
fs_strcmp(const char *str1, const char *str2) 
{ 
  u8_t i; 
  i = 0; 
 loop: 
 
  if(str2[i] == 0 || 
     str1[i] == '\r' ||  
     str1[i] == '\n') { 
    return 0; 
  } 
 
  if(str1[i] != str2[i]) { 
    return 1; 
  } 
 
 
  ++i; 
  goto loop; 
} 
/*-----------------------------------------------------------------------------------*/ 
int 
fs_open(const char *name, struct fs_file *file) 
{ 
#ifdef FS_STATISTICS 
#if FS_STATISTICS == 1 
  u16_t i = 0; 
#endif /* FS_STATISTICS */ 
#endif /* FS_STATISTICS */ 
  struct fsdata_file_noconst *f; 
 
  for(f = (struct fsdata_file_noconst *)FS_ROOT; 
      f != NULL; 
      f = (struct fsdata_file_noconst *)f->next) { 
 
    if(fs_strcmp(name, f->name) == 0) { 
      file->data = f->data; 
      file->len = f->len; 
#ifdef FS_STATISTICS 
#if FS_STATISTICS == 1 
      ++count[i]; 
#endif /* FS_STATISTICS */ 
#endif /* FS_STATISTICS */ 
      return 1; 
    } 
#ifdef FS_STATISTICS 
#if FS_STATISTICS == 1 
    ++i; 
#endif /* FS_STATISTICS */ 
#endif /* FS_STATISTICS */ 
 
  } 
  return 0; 
} 
/*-----------------------------------------------------------------------------------*/ 
void 
fs_init(void) 
{ 
#ifdef FS_STATISTICS 
#if FS_STATISTICS == 1 
  u16_t i; 
  for(i = 0; i < FS_NUMFILES; i++) { 
    count[i] = 0; 
  } 
#endif /* FS_STATISTICS */ 
#endif /* FS_STATISTICS */ 
} 
/*-----------------------------------------------------------------------------------*/ 
#ifdef FS_STATISTICS 
#if FS_STATISTICS == 1   
u16_t fs_count 
(char *name) 
{ 
  struct fsdata_file_noconst *f; 
  u16_t i; 
 
  i = 0; 
  for(f = (struct fsdata_file_noconst *)FS_ROOT; 
      f != NULL; 
      f = (struct fsdata_file_noconst *)f->next) { 
 
    if(fs_strcmp(name, f->name) == 0) { 
      return count[i]; 
    } 
    ++i; 
  } 
  return 0; 
} 
#endif /* FS_STATISTICS */ 
#endif /* FS_STATISTICS */ 
/*-----------------------------------------------------------------------------------*/