1                 : /*
       2                 :  * Copyright (c) 2014 The Native Client Authors. All rights reserved.
       3                 :  * Use of this source code is governed by a BSD-style license that can be
       4                 :  * found in the LICENSE file.
       5                 :  */
       6                 : 
       7                 : #ifndef NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_NACL_SIZE_T_H
       8                 : #define NATIVE_CLIENT_SRC_TRUSTED_SERVICE_RUNTIME_NACL_SIZE_T_H
       9                 : 
      10                 : #include "native_client/src/include/portability.h"
      11                 : 
      12                 : #ifndef nacl_abi_size_t_defined
      13                 : #define nacl_abi_size_t_defined
      14                 : typedef uint32_t nacl_abi_size_t;
      15                 : #endif
      16                 : 
      17                 : #define NACL_ABI_SIZE_T_MIN ((nacl_abi_size_t) 0)
      18                 : #define NACL_ABI_SIZE_T_MAX ((nacl_abi_size_t) -1)
      19                 : 
      20                 : #ifndef nacl_abi_ssize_t_defined
      21                 : #define nacl_abi_ssize_t_defined
      22                 : typedef int32_t nacl_abi_ssize_t;
      23                 : #endif
      24                 : 
      25                 : #define NACL_ABI_SSIZE_T_MAX \
      26                 :   ((nacl_abi_ssize_t) (NACL_ABI_SIZE_T_MAX >> 1))
      27                 : #define NACL_ABI_SSIZE_T_MIN \
      28                 :   (~NACL_ABI_SSIZE_T_MAX)
      29                 : 
      30                 : #define NACL_PRIdNACL_SIZE NACL_PRId32
      31                 : #define NACL_PRIiNACL_SIZE NACL_PRIi32
      32                 : #define NACL_PRIoNACL_SIZE NACL_PRIo32
      33                 : #define NACL_PRIuNACL_SIZE NACL_PRIu32
      34                 : #define NACL_PRIxNACL_SIZE NACL_PRIx32
      35                 : #define NACL_PRIXNACL_SIZE NACL_PRIX32
      36                 : 
      37                 : /**
      38                 :  * Inline functions to aid in conversion between system (s)size_t and
      39                 :  * nacl_abi_(s)size_t
      40                 :  *
      41                 :  * These are defined as inline functions only if __native_client__ is
      42                 :  * undefined, since in a nacl module size_t and nacl_abi_size_t are always
      43                 :  * the same (and we don't have a definition for INLINE, so these won't compile)
      44                 :  *
      45                 :  * If __native_client__ *is* defined, these turn into no-ops.
      46                 :  */
      47                 : #ifdef __native_client__
      48                 :   /**
      49                 :    * NB: The "no-op" version of these functions does NO type conversion.
      50                 :    * Please DO NOT CHANGE THIS. If you get a type error using these functions
      51                 :    * in a NaCl module, it's a real error and should be fixed in your code.
      52                 :    */
      53                 :   #define nacl_abi_size_t_saturate(x) (x)
      54                 :   #define nacl_abi_ssize_t_saturate(x) (x)
      55                 : #else /* __native_client */
      56               2 :   static INLINE nacl_abi_size_t nacl_abi_size_t_saturate(size_t x) {
      57               2 :     if (x > NACL_ABI_SIZE_T_MAX) {
      58               0 :       return NACL_ABI_SIZE_T_MAX;
      59                 :     } else {
      60               2 :       return (nacl_abi_size_t)x;
      61                 :     }
      62               2 :   }
      63                 : 
      64                 :   static INLINE nacl_abi_ssize_t nacl_abi_ssize_t_saturate(ssize_t x) {
      65                 :     if (x > NACL_ABI_SSIZE_T_MAX) {
      66                 :       return NACL_ABI_SSIZE_T_MAX;
      67                 :     } else if (x < NACL_ABI_SSIZE_T_MIN) {
      68                 :       return NACL_ABI_SSIZE_T_MIN;
      69                 :     } else {
      70                 :       return (nacl_abi_ssize_t) x;
      71                 :     }
      72                 :   }
      73                 : #endif /* __native_client */
      74                 : 
      75                 : #endif