#include <windows.h>

#include "plugin.h"

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

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

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

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

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