exdll.h

Last change: 2008-02-03 This is the source code of KCeasy。

/***************************************************************************
Copyright (C) 1999-2004 Nullsoft, Inc.
 
This license applies to everything in the NSIS package, except where
otherwise noted.

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 _EXDLL_H_
#define _EXDLL_H_

// only include this file from one place in your DLL.
// (it is all static, if you use it in two places it will fail)

#define EXDLL_INIT()           {  \
        g_stringsize=string_size; \
        g_stacktop=stacktop;      \
        g_variables=variables; }

#define NSISFunction(funcname) extern "C" void __cdecl \
                               funcname(HWND hwndParent, int string_size, \
                               char *variables, stack_t **stacktop)


// For page showing plug-ins
#define WM_NOTIFY_OUTER_NEXT (WM_USER+0x8)
#define WM_NOTIFY_CUSTOM_READY (WM_USER+0xd)
#define NOTIFY_BYE_BYE 'x'

typedef struct _stack_t {
  struct _stack_t *next;
  char text[1]; // this should be the length of string_size
} stack_t;


static unsigned int g_stringsize;
static stack_t **g_stacktop;
static char *g_variables;

static int __stdcall popstring(char *str); // 0 on success, 1 on empty stack
static void __stdcall pushstring(char *str);

enum
{
INST_0,         // $0
INST_1,         // $1
INST_2,         // $2
INST_3,         // $3
INST_4,         // $4
INST_5,         // $5
INST_6,         // $6
INST_7,         // $7
INST_8,         // $8
INST_9,         // $9
INST_R0,        // $R0
INST_R1,        // $R1
INST_R2,        // $R2
INST_R3,        // $R3
INST_R4,        // $R4
INST_R5,        // $R5
INST_R6,        // $R6
INST_R7,        // $R7
INST_R8,        // $R8
INST_R9,        // $R9
INST_CMDLINE,   // $CMDLINE
INST_INSTDIR,   // $INSTDIR
INST_OUTDIR,    // $OUTDIR
INST_EXEDIR,    // $EXEDIR
INST_LANG,      // $LANGUAGE
__INST_LAST
};


// utility functions (not required but often useful)
static int __stdcall popstring(char *str)
{
  stack_t *th;
  if (!g_stacktop || !*g_stacktop) return 1;
  th=(*g_stacktop);
  lstrcpy(str,th->text);
  *g_stacktop = th->next;
  GlobalFree((HGLOBAL)th);
  return 0;
}

static void __stdcall pushstring(char *str)
{
  stack_t *th;
  if (!g_stacktop) return;
  th=(stack_t*)GlobalAlloc(GPTR,sizeof(stack_t)+g_stringsize);
  lstrcpyn(th->text,str,g_stringsize);
  th->next=*g_stacktop;
  *g_stacktop=th;
}

static char * __stdcall getuservariable(int varnum)
{
  if (varnum < 0 || varnum >= __INST_LAST) return NULL;
  return g_variables+varnum*g_stringsize;
}

static void __stdcall setuservariable(int varnum, char *var)
{
	if (var != NULL && varnum >= 0 && varnum < __INST_LAST) 
		lstrcpy(g_variables + varnum*g_stringsize, var);
}



#endif//_EXDLL_H_