The Tor Browser: xpcom/reflect/xptcall/src/md/unix/xptcstubs

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     2 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     3  *

     4  * This Source Code Form is subject to the terms of the Mozilla Public

     5  * License, v. 2.0. If a copy of the MPL was not distributed with this

     6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     8 /* Implement shared vtbl methods. */

    10 #include "xptcprivate.h"

    11 #include "xptiprivate.h"

    13 #if _HPUX

    14 #error "This code is for HP-PA RISC 32 bit mode only"

    15 #endif

    17 extern "C" nsresult ATTRIBUTE_USED

    18 PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex,

    19   uint32_t* args, uint32_t* floatargs)

    20 {

    22   typedef struct {

    23     uint32_t hi;

    24     uint32_t lo;

    25   } DU;

    27 #define PARAM_BUFFER_COUNT     16

    29   nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];

    30   nsXPTCMiniVariant* dispatchParams = nullptr;

    31   const nsXPTMethodInfo* info;

    32   int32_t regwords = 1; /* self pointer is not in the variant records */

    33   nsresult result = NS_ERROR_FAILURE;

    34   uint8_t paramCount;

    35   uint8_t i;

    37   NS_ASSERTION(self,"no self");

    39   self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);

    40   NS_ASSERTION(info,"no method info");

    41   if (!info)

    42     return NS_ERROR_UNEXPECTED;

    44   paramCount = info->GetParamCount();

    46   // setup variant array pointer

    47   if(paramCount > PARAM_BUFFER_COUNT)

    48     dispatchParams = new nsXPTCMiniVariant[paramCount];

    49   else

    50     dispatchParams = paramBuffer;

    51   NS_ASSERTION(dispatchParams,"no place for params");

    52   if (!dispatchParams)

    53     return NS_ERROR_OUT_OF_MEMORY;

    55   for(i = 0; i < paramCount; ++i, --args)

    56   {

    57     const nsXPTParamInfo& param = info->GetParam(i);

    58     const nsXPTType& type = param.GetType();

    59     nsXPTCMiniVariant* dp = &dispatchParams[i];

    61     if(param.IsOut() || !type.IsArithmetic())

    62     {

    63       dp->val.p = (void*) *args;

    64       ++regwords;

    65       continue;

    66     }

    67     switch(type)

    68     {

    69     case nsXPTType::T_I8     : dp->val.i8  = *((int32_t*) args); break;

    70     case nsXPTType::T_I16    : dp->val.i16 = *((int32_t*) args); break;

    71     case nsXPTType::T_I32    : dp->val.i32 = *((int32_t*) args); break;

    72     case nsXPTType::T_DOUBLE :

    73                                if (regwords & 1)

    74                                {

    75                                  ++regwords; /* align on double word */

    76                                  --args;

    77                                }

    78                                if (regwords == 0 || regwords == 2)

    79                                {

    80                                  dp->val.d=*((double*) (floatargs + regwords));

    81                                  --args;

    82                                }

    83                                else

    84                                {

    85                                  dp->val.d = *((double*) --args);

    86                                }

    87                                regwords += 2;

    88                                continue;

    89     case nsXPTType::T_U64    :

    90     case nsXPTType::T_I64    :

    91                                if (regwords & 1)

    92                                {

    93                                  ++regwords; /* align on double word */

    94                                  --args;

    95                                }

    96                                ((DU *)dp)->lo = *((uint32_t*) args);

    97                                ((DU *)dp)->hi = *((uint32_t*) --args);

    98                                regwords += 2;

    99                                continue;

   100     case nsXPTType::T_FLOAT  :

   101                                if (regwords >= 4)

   102                                  dp->val.f = *((float*) args);

   103                                else

   104                                  dp->val.f = *((float*) floatargs+4+regwords);

   105                                break;

   106     case nsXPTType::T_U8     : dp->val.u8  = *((uint32_t*) args); break;

   107     case nsXPTType::T_U16    : dp->val.u16 = *((uint32_t*) args); break;

   108     case nsXPTType::T_U32    : dp->val.u32 = *((uint32_t*) args); break;

   109     case nsXPTType::T_BOOL   : dp->val.b   = *((uint32_t*) args); break;

   110     case nsXPTType::T_CHAR   : dp->val.c   = *((uint32_t*) args); break;

   111     case nsXPTType::T_WCHAR  : dp->val.wc  = *((int32_t*)  args); break;

   112     default:

   113       NS_ERROR("bad type");

   114       break;

   115     }

   116     ++regwords;

   117   }

   119   result = self->mOuter->CallMethod((uint16_t) methodIndex, info, dispatchParams);

   121   if(dispatchParams != paramBuffer)

   122     delete [] dispatchParams;

   124   return result;

   125 }

   127 extern "C" nsresult SharedStub(int);

   129 #define STUB_ENTRY(n)       \

   130 nsresult nsXPTCStubBase::Stub##n()  \

   131 {                           \

   132     return SharedStub(n);   \

   133 }

   135 #define SENTINEL_ENTRY(n) \

   136 nsresult nsXPTCStubBase::Sentinel##n() \

   137 { \

   138     NS_ERROR("nsXPTCStubBase::Sentinel called"); \

   139     return NS_ERROR_NOT_IMPLEMENTED; \

   140 }

   142 #include "xptcstubsdef.inc"

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