dial spec 1.7

server/dial_data.c

@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2014 Netflix, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETFLIX, INC. 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 NETFLIX 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.
+ */
+/*
+ * Functions related to storing/retrieving and manipulating DIAL data.
+ */
+#include "dial_data.h"
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+
+char dial_data_dir[256] = DIAL_DATA_DIR;
+
+void set_dial_data_dir(const char *data_dir) {
+    strncpy(dial_data_dir, data_dir, 255);
+}
+
+/**
+ * Returns the path where data is stored for the given app.
+ */
+static char* getAppPath(char app_name[]) {
+    size_t name_size = strlen(app_name) + sizeof(dial_data_dir) + 1;
+    char* filename = (char*) malloc(name_size);
+    filename[0] = 0;
+    strncat(filename, dial_data_dir, name_size);
+    strncat(filename, app_name, name_size - sizeof(dial_data_dir));
+    return filename;
+}
+
+void store_dial_data(char app_name[], DIALData *data) {
+    char* filename = getAppPath(app_name);
+    FILE *f = fopen(filename, "w");
+    if (f == NULL) {
+        printf("Cannot open DIAL data output file: %s\n", filename);
+        exit(1);
+    }
+    for (DIALData *first = data; first != NULL; first = first->next) {
+        fprintf(f, "%s %s\n", first->key, first->value);
+    }
+    fclose(f);
+}
+
+DIALData *retrieve_dial_data(char *app_name) {
+    char* filename = getAppPath(app_name);
+    FILE *f = fopen(filename, "r");
+    if (f == NULL) {
+        return NULL; // no dial data found, that's fine
+    }
+    DIALData *result = NULL;
+    char key[256];
+    char value[256];
+    while (fscanf(f, "%255s %255s\n", key, value) != EOF) {
+        DIALData *newNode = (DIALData *) malloc(sizeof(DIALData));
+        newNode->key = (char *) malloc(strlen(key));
+        strcpy(newNode->key, key);
+        newNode->value = (char *) malloc(strlen(value));
+        strcpy(newNode->value, value);
+        newNode->next = result;
+        result = newNode;
+    }
+    fclose(f);
+    return result;
+}
+