/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
 * Description: sscanf_s  function
 * Author: lishunda
 * Create: 2014-02-25
 */

#include "securec.h"

/*
 * <FUNCTION DESCRIPTION>
 *    The sscanf_s function is equivalent to fscanf_s,
 *     except that input is obtained from a string (specified by the argument
 * buffer) rather than from a stream The sscanf function reads data from buffer
 * into the location given by each argument. Every argument must be a pointer to
 * a variable with a type that corresponds to a type specifier in format. The
 * format argument controls the interpretation of the input fields and has the
 * same form and function as the format argument for the scanf function. If
 * copying takes place between strings that overlap, the behavior is undefined.
 *
 * <INPUT PARAMETERS>
 *    buffer                 Stored data.
 *    format                 Format control string, see Format Specifications.
 *    ...                    Optional arguments.
 *
 * <OUTPUT PARAMETERS>
 *    ...                    The converted value stored in user assigned address
 *
 * <RETURN VALUE>
 *    Each of these functions returns the number of fields successfully
 * converted and assigned; the return value does not include fields that were
 * read but not assigned. A return value of 0 indicates that no fields were
 * assigned. return -1 if an error occurs.
 */
int sscanf_s(const char *buffer, const char *format, ...) {
  int ret; /* If initialization causes  e838 */
  va_list argList;

  va_start(argList, format);
  ret = vsscanf_s(buffer, format, argList);
  va_end(argList);
  (void)argList; /* To clear e438 last value assigned not used , the compiler
                    will optimize this code */

  return ret;
}
#if SECUREC_IN_KERNEL
EXPORT_SYMBOL(sscanf_s);
#endif