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/*
Win32API - Ruby Win32 API Import Facility
*/
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#define _T_VOID 0
#define _T_NUMBER 1
#define _T_POINTER 2
#define _T_INTEGER 3
typedef char *ApiPointer(void);
typedef long ApiNumber(void);
typedef void ApiVoid(void);
typedef int ApiInteger(void);
#include "ruby.h"
typedef struct {
HANDLE dll;
HANDLE proc;
VALUE dllname;
VALUE import;
VALUE export;
} Win32API;
static void
Win32API_FreeLibrary(hdll)
HINSTANCE hdll;
{
FreeLibrary(hdll);
}
static VALUE
Win32API_initialize(self, dllname, proc, import, export)
VALUE self;
VALUE dllname;
VALUE proc;
VALUE import;
VALUE export;
{
HANDLE hproc;
HINSTANCE hdll;
VALUE str;
VALUE a_import;
VALUE *ptr;
int i;
int len;
int ex;
hdll = GetModuleHandle(RSTRING(dllname)->ptr);
if (!hdll) {
hdll = LoadLibrary(RSTRING(dllname)->ptr);
if (!hdll)
Fail("LoadLibrary: %s\n", RSTRING(dllname)->ptr);
Data_Wrap_Struct(self, 0, Win32API_FreeLibrary, hdll);
}
hproc = GetProcAddress(hdll, RSTRING(proc)->ptr);
if (!hproc) {
str = str_new3(proc);
str = str_cat(str, "A", 1);
hproc = GetProcAddress(hdll, RSTRING(str)->ptr);
if (!hproc)
Fail("GetProcAddress: %s or %s\n",
RSTRING(proc)->ptr, RSTRING(str)->ptr);
}
rb_iv_set(self, "__dll__", INT2NUM((int)hdll));
rb_iv_set(self, "__dllname__", dllname);
rb_iv_set(self, "__proc__", INT2NUM((int)hproc));
a_import = ary_new();
ptr = RARRAY(import)->ptr;
for (i = 0, len = RARRAY(import)->len; i < len; i++) {
int c = *(char *)RSTRING(ptr[i])->ptr;
switch (c) {
case 'N': case 'n': case 'L': case 'l':
ary_push(a_import, INT2FIX(_T_NUMBER));
break;
case 'P': case 'p':
ary_push(a_import, INT2FIX(_T_POINTER));
break;
case 'I': case 'i':
ary_push(a_import, INT2FIX(_T_INTEGER));
break;
}
}
rb_iv_set(self, "__import__", a_import);
switch (*RSTRING(export)->ptr) {
case 'V': case 'v':
ex = _T_VOID;
break;
case 'N': case 'n': case 'L': case 'l':
ex = _T_NUMBER;
break;
case 'P': case 'p':
ex = _T_POINTER;
break;
case 'I': case 'i':
ex = _T_INTEGER;
break;
}
rb_iv_set(self, "__export__", INT2FIX(ex));
return Qnil;
}
static VALUE
Win32API_Call(argc, argv, obj)
VALUE argc;
VALUE argv;
VALUE obj;
{
VALUE args;
FARPROC ApiFunction;
ApiPointer *ApiFunctionPointer;
ApiNumber *ApiFunctionNumber;
ApiVoid *ApiFunctionVoid;
ApiInteger *ApiFunctionInteger;
long lParam;
char *pParam;
VALUE Return;
VALUE obj_proc;
VALUE obj_import;
VALUE obj_export;
VALUE import_type;
int nimport, timport, texport, i;
int items;
items = rb_scan_args(argc, argv, "0*", &args);
obj_proc = rb_iv_get(obj, "__proc__");
ApiFunction = (FARPROC)NUM2INT(obj_proc);
obj_import = rb_iv_get(obj, "__import__");
obj_export = rb_iv_get(obj, "__export__");
nimport = RARRAY(obj_import)->len;
texport = FIX2INT(obj_export);
if (items != nimport)
Fail("Wrong number of parameters: expected %d, got %d.\n",
nimport, items);
if (0 < nimport) {
for (i = nimport - 1; 0 <= i; i--) {
VALUE str;
import_type = ary_entry(obj_import, i);
timport = FIX2INT(import_type);
switch (timport) {
case _T_NUMBER:
case _T_INTEGER:
lParam = NUM2INT(ary_entry(args, i));
#if defined(_MSC_VER) || defined(__LCC__)
_asm {
mov eax, lParam
push eax
}
#elif defined(__CYGWIN32__) || defined(__MINGW32__)
asm volatile ("pushl %0" :: "g" (lParam));
#else
#error
#endif
break;
case _T_POINTER:
str = ary_entry(args, i);
Check_Type(str, T_STRING);
str_modify(str);
pParam = RSTRING(str)->ptr;
#if defined(_MSC_VER) || defined(__LCC__)
_asm {
mov eax, dword ptr pParam
push eax
}
#elif defined(__CYGWIN32__) || defined(__MINGW32__)
asm volatile ("pushl %0" :: "g" (pParam));
#else
#error
#endif
break;
}
}
}
switch (texport) {
case _T_NUMBER:
ApiFunctionNumber = (ApiNumber *) ApiFunction;
Return = INT2NUM(ApiFunctionNumber());
break;
case _T_POINTER:
ApiFunctionPointer = (ApiPointer *) ApiFunction;
Return = str_new2((char *)ApiFunctionPointer());
break;
case _T_INTEGER:
ApiFunctionInteger = (ApiInteger *) ApiFunction;
Return = INT2NUM(ApiFunctionInteger());
break;
case _T_VOID:
default:
ApiFunctionVoid = (ApiVoid *) ApiFunction;
ApiFunctionVoid();
Return = INT2NUM(0);
break;
}
return Return;
}
void
Init_Win32API()
{
VALUE cWin32API = rb_define_class("Win32API", cObject);
rb_define_method(cWin32API, "initialize", Win32API_initialize, 4);
rb_define_method(cWin32API, "call", Win32API_Call, -1);
rb_define_alias(cWin32API, "Call", "call");
}
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