--- /dev/null
+/*
+ * Copyright (c) 2001-2003 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. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <adam@sics.se>
+ *
+ */
+#include "lwip/opt.h"
+#include "lwip/def.h"
+#include "fs.h"
+#include "fsdata.h"
+#include <string.h>
+
+/** Set this to 1 to include "fsdata_custom.c" instead of "fsdata.c" for the
+ * file system (to prevent changing the file included in CVS) */
+#ifndef HTTPD_USE_CUSTUM_FSDATA
+#define HTTPD_USE_CUSTUM_FSDATA 0
+#endif
+
+#if HTTPD_USE_CUSTUM_FSDATA
+#include "fsdata_custom.c"
+#else /* HTTPD_USE_CUSTUM_FSDATA */
+#include "fsdata.c"
+#endif /* HTTPD_USE_CUSTUM_FSDATA */
+
+/*-----------------------------------------------------------------------------------*/
+/* Define the number of open files that we can support. */
+#ifndef LWIP_MAX_OPEN_FILES
+#define LWIP_MAX_OPEN_FILES 10
+#endif
+
+/* Define the file system memory allocation structure. */
+struct fs_table {
+ struct fs_file file;
+ u8_t inuse;
+};
+
+/* Allocate file system memory */
+struct fs_table fs_memory[LWIP_MAX_OPEN_FILES];
+
+#if LWIP_HTTPD_CUSTOM_FILES
+int fs_open_custom(struct fs_file *file, const char *name);
+void fs_close_custom(struct fs_file *file);
+#endif /* LWIP_HTTPD_CUSTOM_FILES */
+
+/*-----------------------------------------------------------------------------------*/
+static struct fs_file *
+fs_malloc(void)
+{
+ int i;
+ for(i = 0; i < LWIP_MAX_OPEN_FILES; i++) {
+ if(fs_memory[i].inuse == 0) {
+ fs_memory[i].inuse = 1;
+ return(&fs_memory[i].file);
+ }
+ }
+ return(NULL);
+}
+
+/*-----------------------------------------------------------------------------------*/
+static void
+fs_free(struct fs_file *file)
+{
+ int i;
+ for(i = 0; i < LWIP_MAX_OPEN_FILES; i++) {
+ if(&fs_memory[i].file == file) {
+ fs_memory[i].inuse = 0;
+ break;
+ }
+ }
+ return;
+}
+
+/*-----------------------------------------------------------------------------------*/
+struct fs_file *
+fs_open(const char *name)
+{
+ struct fs_file *file;
+ const struct fsdata_file *f;
+
+ file = fs_malloc();
+ if(file == NULL) {
+ return NULL;
+ }
+
+#if LWIP_HTTPD_CUSTOM_FILES
+ if(fs_open_custom(file, name)) {
+ file->is_custom_file = 1;
+ return file;
+ }
+ file->is_custom_file = 0;
+#endif /* LWIP_HTTPD_CUSTOM_FILES */
+
+ for(f = FS_ROOT; f != NULL; f = f->next) {
+ if (!strcmp(name, (char *)f->name)) {
+ file->data = (const char *)f->data;
+ file->len = f->len;
+ file->index = f->len;
+ file->pextension = NULL;
+ file->http_header_included = f->http_header_included;
+#if HTTPD_PRECALCULATED_CHECKSUM
+ file->chksum_count = f->chksum_count;
+ file->chksum = f->chksum;
+#endif /* HTTPD_PRECALCULATED_CHECKSUM */
+#if LWIP_HTTPD_FILE_STATE
+ file->state = fs_state_init(file, name);
+#endif /* #if LWIP_HTTPD_FILE_STATE */
+ return file;
+ }
+ }
+ fs_free(file);
+ return NULL;
+}
+
+/*-----------------------------------------------------------------------------------*/
+void
+fs_close(struct fs_file *file)
+{
+#if LWIP_HTTPD_CUSTOM_FILES
+ if (file->is_custom_file) {
+ fs_close_custom(file);
+ }
+#endif /* LWIP_HTTPD_CUSTOM_FILES */
+#if LWIP_HTTPD_FILE_STATE
+ fs_state_free(file, file->state);
+#endif /* #if LWIP_HTTPD_FILE_STATE */
+ fs_free(file);
+}
+/*-----------------------------------------------------------------------------------*/
+int
+fs_read(struct fs_file *file, char *buffer, int count)
+{
+ int read;
+
+ if(file->index == file->len) {
+ return -1;
+ }
+
+ read = file->len - file->index;
+ if(read > count) {
+ read = count;
+ }
+
+ MEMCPY(buffer, (file->data + file->index), read);
+ file->index += read;
+
+ return(read);
+}
+/*-----------------------------------------------------------------------------------*/
+int fs_bytes_left(struct fs_file *file)
+{
+ return file->len - file->index;
+}
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