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ENH: Added support for Watcom compiler. Added TODO comment about calling conventions.

This commit is contained in:
Brad King 2007-04-19 11:31:55 -04:00
parent a7efb3feb7
commit 16be80b7b4
1 changed files with 30 additions and 4 deletions
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34
Source/kwsys/DynamicLoader.cxx
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@ -251,13 +251,35 @@ int DynamicLoader::CloseLibrary(DynamicLoader::LibraryHandle lib)
DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
DynamicLoader::LibraryHandle lib, const char* sym)
{
// TODO: The calling convention affects the name of the symbol. We
// should have a tool to help get the symbol with the desired
// calling convention. Currently we assume cdecl.
//
// Borland:
// __cdecl = "_func" (default)
// __fastcall = "@_func"
// __stdcall = "func"
//
// Watcom:
// __cdecl = "_func"
// __fastcall = "@_func@X"
// __stdcall = "_func@X"
// __watcall = "func_" (default)
//
// MSVC:
// __cdecl = "func" (default)
// __fastcall = "@_func@X"
// __stdcall = "_func@X"
//
// Note that the "@X" part of the name above is the total size (in
// bytes) of the arguments on the stack.
void *result;
#ifdef __BORLANDC__
// Need to prepend symbols with '_' on borland compilers
#if defined(__BORLANDC__) || defined(__WATCOMC__)
// Need to prepend symbols with '_'
size_t len = strlen(sym);
char *rsym = new char[len + 1 + 1];
strcpy(rsym, "_");
strcat(rsym+1, sym);
strcat(rsym, sym);
#else
const char *rsym = sym;
#endif
@ -268,11 +290,15 @@ DynamicLoader::SymbolPointer DynamicLoader::GetSymbolAddress(
#else
result = (void*)GetProcAddress(lib, rsym);
#endif
#ifdef __BORLANDC__
#if defined(__BORLANDC__) || defined(__WATCOMC__)
delete[] rsym;
#endif
// Hack to cast pointer-to-data to pointer-to-function.
#ifdef __WATCOMC__
return *(DynamicLoader::SymbolPointer*)(&result);
#else
return *reinterpret_cast<DynamicLoader::SymbolPointer*>(&result);
#endif
}
//----------------------------------------------------------------------------