Initial community commit

Src/ns-eel/ns-eel-addfuncs.h

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+/*
+  Nullsoft Expression Evaluator Library (NS-EEL)
+  Copyright (C) 1999-2003 Nullsoft, Inc.
+  
+  ns-eel-addfuncs.h: defines macros useful for adding functions to the compiler
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef __NS_EEL_ADDFUNCS_H__
+#define __NS_EEL_ADDFUNCS_H__
+
+
+
+typedef void (*NSEEL_PPPROC)(void *data, int data_size, void **userfunc_data);
+
+
+
+// these are used for making your own naked functions in C.
+/*
+For example:
+static double (*__acos)(double) = &acos;
+__declspec ( naked ) void _asm_acos(void)
+{
+  FUNC1_ENTER
+
+  *__nextBlock = __acos(*parm_a);
+
+  FUNC_LEAVE
+}
+__declspec ( naked ) void _asm_acos_end(void) {}
+
+
+
+If you want to do straight asm, then , well, you can use your imagination
+(eax, ebx, ecx are input, eax is output, all points to "double")
+if you need 8 bytes of temp space for your output, use esi and increment esi by 8
+be sure to preserve edi, too.
+
+*/
+
+
+
+#define FUNC1_ENTER \
+  double *parm_a, *__nextBlock; \
+  __asm { mov ebp, esp } \
+  __asm { sub esp, __LOCAL_SIZE } \
+  __asm { mov dword ptr parm_a, eax } \
+  __asm { mov __nextBlock, esi }
+
+#define FUNC2_ENTER \
+  double *parm_a,*parm_b,*__nextBlock; \
+  __asm { mov ebp, esp } \
+  __asm { sub esp, __LOCAL_SIZE } \
+  __asm { mov dword ptr parm_a, eax } \
+  __asm { mov dword ptr parm_b, ebx } \
+  __asm { mov __nextBlock, esi }
+
+#define FUNC3_ENTER \
+  double *parm_a,*parm_b,*parm_c,*__nextBlock; \
+  __asm { mov ebp, esp } \
+  __asm { sub esp, __LOCAL_SIZE } \
+  __asm { mov dword ptr parm_a, eax } \
+  __asm { mov dword ptr parm_b, ebx } \
+  __asm { mov dword ptr parm_c, ecx } \
+  __asm { mov __nextBlock, esi }
+
+#define FUNC_LEAVE \
+  __asm { mov eax, esi } \
+  __asm { add esi, 8 }  \
+  __asm { mov esp, ebp }
+
+#define NSEEL_CGEN_CALL __fastcall
+
+
+#endif//__NS_EEL_ADDFUNCS_H__