[Feature][S300][task-view-1900][arms] Docking with ARMS platform，basic documents
Change-Id: I89df7b9e3685d6f6205bd2a4ff00ac67c8f447cb
diff --git a/lynq/S300/ap/app/apparms/json-c/json_pointer.c b/lynq/S300/ap/app/apparms/json-c/json_pointer.c
new file mode 100755
index 0000000..5abccdb
--- /dev/null
+++ b/lynq/S300/ap/app/apparms/json-c/json_pointer.c
@@ -0,0 +1,361 @@
+/*
+ * Copyright (c) 2016 Alexandru Ardelean.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the MIT license. See COPYING for details.
+ *
+ */
+
+#include "config.h"
+
+#include "strerror_override.h"
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "json_pointer.h"
+#include "strdup_compat.h"
+#include "vasprintf_compat.h"
+
+/* Avoid ctype.h and locale overhead */
+#define is_plain_digit(c) ((c) >= '0' && (c) <= '9')
+
+/**
+ * JavaScript Object Notation (JSON) Pointer
+ * RFC 6901 - https://tools.ietf.org/html/rfc6901
+ */
+
+static void string_replace_all_occurrences_with_char(char *s, const char *occur, char repl_char)
+{
+ size_t slen = strlen(s);
+ size_t skip = strlen(occur) - 1; /* length of the occurrence, minus the char we're replacing */
+ char *p = s;
+ while ((p = strstr(p, occur)))
+ {
+ *p = repl_char;
+ p++;
+ slen -= skip;
+ memmove(p, (p + skip), slen - (p - s) + 1); /* includes null char too */
+ }
+}
+
+static int is_valid_index(struct json_object *jo, const char *path, size_t *idx)
+{
+ size_t i, len = strlen(path);
+ long int idx_val = -1;
+ /* this code-path optimizes a bit, for when we reference the 0-9 index range
+ * in a JSON array and because leading zeros not allowed
+ */
+ if (len == 1)
+ {
+ if (is_plain_digit(path[0]))
+ {
+ *idx = (path[0] - '0');
+ goto check_oob;
+ }
+ errno = EINVAL;
+ return 0;
+ }
+ /* leading zeros not allowed per RFC */
+ if (path[0] == '0')
+ {
+ errno = EINVAL;
+ return 0;
+ }
+ /* RFC states base-10 decimals */
+ for (i = 0; i < len; i++)
+ {
+ if (!is_plain_digit(path[i]))
+ {
+ errno = EINVAL;
+ return 0;
+ }
+ }
+
+ idx_val = strtol(path, NULL, 10);
+ if (idx_val < 0)
+ {
+ errno = EINVAL;
+ return 0;
+ }
+ *idx = idx_val;
+
+check_oob:
+ len = json_object_array_length(jo);
+ if (*idx >= len)
+ {
+ errno = ENOENT;
+ return 0;
+ }
+
+ return 1;
+}
+
+static int json_pointer_get_single_path(struct json_object *obj, char *path,
+ struct json_object **value)
+{
+ if (json_object_is_type(obj, json_type_array))
+ {
+ size_t idx;
+ if (!is_valid_index(obj, path, &idx))
+ return -1;
+ obj = json_object_array_get_idx(obj, idx);
+ if (obj)
+ {
+ if (value)
+ *value = obj;
+ return 0;
+ }
+ /* Entry not found */
+ errno = ENOENT;
+ return -1;
+ }
+
+ /* RFC states that we first must eval all ~1 then all ~0 */
+ string_replace_all_occurrences_with_char(path, "~1", '/');
+ string_replace_all_occurrences_with_char(path, "~0", '~');
+
+ if (!json_object_object_get_ex(obj, path, value))
+ {
+ errno = ENOENT;
+ return -1;
+ }
+
+ return 0;
+}
+
+static int json_pointer_set_single_path(struct json_object *parent, const char *path,
+ struct json_object *value)
+{
+ if (json_object_is_type(parent, json_type_array))
+ {
+ size_t idx;
+ /* RFC (Chapter 4) states that '-' may be used to add new elements to an array */
+ if (path[0] == '-' && path[1] == '\0')
+ return json_object_array_add(parent, value);
+ if (!is_valid_index(parent, path, &idx))
+ return -1;
+ return json_object_array_put_idx(parent, idx, value);
+ }
+
+ /* path replacements should have been done in json_pointer_get_single_path(),
+ * and we should still be good here
+ */
+ if (json_object_is_type(parent, json_type_object))
+ return json_object_object_add(parent, path, value);
+
+ /* Getting here means that we tried to "dereference" a primitive JSON type
+ * (like string, int, bool).i.e. add a sub-object to it
+ */
+ errno = ENOENT;
+ return -1;
+}
+
+static int json_pointer_get_recursive(struct json_object *obj, char *path,
+ struct json_object **value)
+{
+ char *endp;
+ int rc;
+
+ /* All paths (on each recursion level must have a leading '/' */
+ if (path[0] != '/')
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ path++;
+
+ endp = strchr(path, '/');
+ if (endp)
+ *endp = '\0';
+
+ /* If we err-ed here, return here */
+ if ((rc = json_pointer_get_single_path(obj, path, &obj)))
+ return rc;
+
+ if (endp)
+ {
+ /* Put the slash back, so that the sanity check passes on next recursion level */
+ *endp = '/';
+ return json_pointer_get_recursive(obj, endp, value);
+ }
+
+ /* We should be at the end of the recursion here */
+ if (value)
+ *value = obj;
+
+ return 0;
+}
+
+int json_pointer_get(struct json_object *obj, const char *path, struct json_object **res)
+{
+ char *path_copy = NULL;
+ int rc;
+
+ if (!obj || !path)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (path[0] == '\0')
+ {
+ if (res)
+ *res = obj;
+ return 0;
+ }
+
+ /* pass a working copy to the recursive call */
+ if (!(path_copy = strdup(path)))
+ {
+ errno = ENOMEM;
+ return -1;
+ }
+ rc = json_pointer_get_recursive(obj, path_copy, res);
+ free(path_copy);
+
+ return rc;
+}
+
+int json_pointer_getf(struct json_object *obj, struct json_object **res, const char *path_fmt, ...)
+{
+ char *path_copy = NULL;
+ int rc = 0;
+ va_list args;
+
+ if (!obj || !path_fmt)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ va_start(args, path_fmt);
+ rc = vasprintf(&path_copy, path_fmt, args);
+ va_end(args);
+
+ if (rc < 0)
+ return rc;
+
+ if (path_copy[0] == '\0')
+ {
+ if (res)
+ *res = obj;
+ goto out;
+ }
+
+ rc = json_pointer_get_recursive(obj, path_copy, res);
+out:
+ free(path_copy);
+
+ return rc;
+}
+
+int json_pointer_set(struct json_object **obj, const char *path, struct json_object *value)
+{
+ const char *endp;
+ char *path_copy = NULL;
+ struct json_object *set = NULL;
+ int rc;
+
+ if (!obj || !path)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (path[0] == '\0')
+ {
+ json_object_put(*obj);
+ *obj = value;
+ return 0;
+ }
+
+ if (path[0] != '/')
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* If there's only 1 level to set, stop here */
+ if ((endp = strrchr(path, '/')) == path)
+ {
+ path++;
+ return json_pointer_set_single_path(*obj, path, value);
+ }
+
+ /* pass a working copy to the recursive call */
+ if (!(path_copy = strdup(path)))
+ {
+ errno = ENOMEM;
+ return -1;
+ }
+ path_copy[endp - path] = '\0';
+ rc = json_pointer_get_recursive(*obj, path_copy, &set);
+ free(path_copy);
+
+ if (rc)
+ return rc;
+
+ endp++;
+ return json_pointer_set_single_path(set, endp, value);
+}
+
+int json_pointer_setf(struct json_object **obj, struct json_object *value, const char *path_fmt,
+ ...)
+{
+ char *endp;
+ char *path_copy = NULL;
+ struct json_object *set = NULL;
+ va_list args;
+ int rc = 0;
+
+ if (!obj || !path_fmt)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ /* pass a working copy to the recursive call */
+ va_start(args, path_fmt);
+ rc = vasprintf(&path_copy, path_fmt, args);
+ va_end(args);
+
+ if (rc < 0)
+ return rc;
+
+ if (path_copy[0] == '\0')
+ {
+ json_object_put(*obj);
+ *obj = value;
+ goto out;
+ }
+
+ if (path_copy[0] != '/')
+ {
+ errno = EINVAL;
+ rc = -1;
+ goto out;
+ }
+
+ /* If there's only 1 level to set, stop here */
+ if ((endp = strrchr(path_copy, '/')) == path_copy)
+ {
+ set = *obj;
+ goto set_single_path;
+ }
+
+ *endp = '\0';
+ rc = json_pointer_get_recursive(*obj, path_copy, &set);
+
+ if (rc)
+ goto out;
+
+set_single_path:
+ endp++;
+ rc = json_pointer_set_single_path(set, endp, value);
+out:
+ free(path_copy);
+ return rc;
+}