mirror of
https://repo.dactyloidae.xyz/Dactyloidae/UXP.git
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130 lines
4.4 KiB
C++
130 lines
4.4 KiB
C++
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Platform specific code to invoke XPCOM methods on native objects */
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#include "xptcprivate.h"
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// Remember that these 'words' are 32bit DWORDS
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extern "C" {
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static uint32_t
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invoke_count_words(uint32_t paramCount, nsXPTCVariant* s)
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{
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uint32_t result = 0;
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for(uint32_t i = 0; i < paramCount; i++, s++)
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{
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if(s->IsPtrData())
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{
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result++;
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continue;
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}
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switch(s->type)
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{
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case nsXPTType::T_I8 :
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case nsXPTType::T_I16 :
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case nsXPTType::T_I32 :
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result++;
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break;
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case nsXPTType::T_I64 :
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result+=2;
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break;
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case nsXPTType::T_U8 :
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case nsXPTType::T_U16 :
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case nsXPTType::T_U32 :
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result++;
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break;
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case nsXPTType::T_U64 :
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result+=2;
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break;
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case nsXPTType::T_FLOAT :
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result++;
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break;
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case nsXPTType::T_DOUBLE :
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result+=2;
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break;
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case nsXPTType::T_BOOL :
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case nsXPTType::T_CHAR :
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case nsXPTType::T_WCHAR :
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result++;
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break;
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default:
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// all the others are plain pointer types
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result++;
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break;
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}
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}
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return result;
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}
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void
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invoke_copy_to_stack(uint32_t* d, uint32_t paramCount, nsXPTCVariant* s)
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{
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for(uint32_t i = 0; i < paramCount; i++, d++, s++)
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{
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if(s->IsPtrData())
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{
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*((void**)d) = s->ptr;
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continue;
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}
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switch(s->type)
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{
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// 8 and 16 bit types should be promoted to 32 bits when copying
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// onto the stack.
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case nsXPTType::T_I8 : *((uint32_t*)d) = s->val.i8; break;
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case nsXPTType::T_I16 : *((uint32_t*)d) = s->val.i16; break;
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case nsXPTType::T_I32 : *((int32_t*) d) = s->val.i32; break;
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case nsXPTType::T_I64 : *((int64_t*) d) = s->val.i64; d++; break;
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case nsXPTType::T_U8 : *((uint32_t*)d) = s->val.u8; break;
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case nsXPTType::T_U16 : *((uint32_t*)d) = s->val.u16; break;
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case nsXPTType::T_U32 : *((uint32_t*)d) = s->val.u32; break;
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case nsXPTType::T_U64 : *((uint64_t*)d) = s->val.u64; d++; break;
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case nsXPTType::T_FLOAT : *((float*) d) = s->val.f; break;
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case nsXPTType::T_DOUBLE : *((double*) d) = s->val.d; d++; break;
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case nsXPTType::T_BOOL : *((uint32_t*)d) = s->val.b; break;
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case nsXPTType::T_CHAR : *((uint32_t*)d) = s->val.c; break;
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case nsXPTType::T_WCHAR : *((wchar_t*) d) = s->val.wc; break;
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default:
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// all the others are plain pointer types
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*((void**)d) = s->val.p;
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break;
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}
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}
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}
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}
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EXPORT_XPCOM_API(nsresult)
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NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
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uint32_t paramCount, nsXPTCVariant* params)
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{
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uint32_t result, n;
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n = invoke_count_words(paramCount, params) * 4;
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__asm__ __volatile__(
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"subl %5, %%sp\n\t" /* make room for params */
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"movel %4, %%sp@-\n\t"
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"movel %3, %%sp@-\n\t"
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"pea %%sp@(8)\n\t"
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"jbsr invoke_copy_to_stack\n\t" /* copy params */
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"addw #12, %%sp\n\t"
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"movel %1, %%sp@-\n\t"
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"movel %1@, %%a0\n\t"
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"movel %%a0@(%2:l:4), %%a0\n\t"
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"jbsr %%a0@\n\t" /* safe to not cleanup sp */
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"lea %%sp@(4,%5:l), %%sp\n\t"
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"movel %%d0, %0"
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: "=d" (result) /* %0 */
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: "a" (that), /* %1 */
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"d" (methodIndex), /* %2 */
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"g" (paramCount), /* %3 */
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"g" (params), /* %4 */
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"d" (n) /* %5 */
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: "a0", "a1", "d0", "d1", "memory"
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);
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return result;
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}
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