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git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@625 212acab6-be3b-0410-9dea-997c60f758d6

Contrib/ExDLL/exdll.c

@@ -0,0 +1,102 @@
+#include <windows.h>
+
+typedef struct _stack_t {
+  struct _stack_t *next;
+  char text[1]; // this should be the length of string_size
+} stack_t;
+
+int popstring(char *str); // 0 on success, 1 on empty stack
+void 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_LAST
+};
+
+char *getuservariable(int varnum);
+
+
+HINSTANCE g_hInstance;
+HWND g_hwndParent;
+int g_stringsize;
+stack_t **g_stacktop;
+char *g_variables;
+
+void __declspec(dllexport) myFunction(HWND hwndParent, int string_size, 
+                                      char *variables, stack_t **stacktop)
+{
+  g_hwndParent=hwndParent;
+  g_stringsize=string_size;
+  g_stacktop=stacktop;
+  g_variables=variables;
+
+  // do your stuff here
+  {
+    char buf[1024];
+    wsprintf(buf,"$0=%s\n",getuservariable(INST_0));
+    MessageBox(g_hwndParent,buf,0,MB_OK);
+  }
+}
+
+
+
+BOOL WINAPI _DllMainCRTStartup(HANDLE hInst, ULONG ul_reason_for_call, LPVOID lpReserved)
+{
+  g_hInstance=hInst;
+	return TRUE;
+}
+
+
+// utility functions (not required but often useful)
+int 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;
+}
+
+void 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;
+}
+
+char *getuservariable(int varnum)
+{
+  if (varnum < 0 || varnum >= __INST_LAST) return NULL;
+  return g_variables+varnum*g_stringsize;
+}
+
+