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/*
Win32API - Ruby Win32 API Import Facility
*/
#if !defined _MSC_VER && !defined _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#endif
#define _T_VOID 0
#define _T_NUMBER 1
#define _T_POINTER 2
#define _T_INTEGER 3
#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;
char *s;
int i;
int len;
int ex = _T_VOID;
SafeStringValue(dllname);
SafeStringValue(proc);
hdll = LoadLibrary(RSTRING(dllname)->ptr);
if (!hdll)
rb_raise(rb_eRuntimeError, "LoadLibrary: %s\n", RSTRING(dllname)->ptr);
rb_iv_set(self, "__hdll__", Data_Wrap_Struct(rb_cData, 0, Win32API_FreeLibrary, hdll));
hproc = GetProcAddress(hdll, RSTRING(proc)->ptr);
if (!hproc) {
str = rb_str_new3(proc);
str = rb_str_cat(str, "A", 1);
hproc = GetProcAddress(hdll, RSTRING(str)->ptr);
if (!hproc)
rb_raise(rb_eRuntimeError, "GetProcAddress: %s or %s\n",
RSTRING(proc)->ptr, RSTRING(str)->ptr);
}
rb_iv_set(self, "__dll__", UINT2NUM((unsigned long)hdll));
rb_iv_set(self, "__dllname__", dllname);
rb_iv_set(self, "__proc__", UINT2NUM((unsigned long)hproc));
a_import = rb_ary_new();
switch (TYPE(import)) {
case T_NIL:
break;
case T_ARRAY:
ptr = RARRAY(import)->ptr;
for (i = 0, len = RARRAY(import)->len; i < len; i++) {
SafeStringValue(ptr[i]);
switch (*(char *)RSTRING(ptr[i])->ptr) {
case 'N': case 'n': case 'L': case 'l':
rb_ary_push(a_import, INT2FIX(_T_NUMBER));
break;
case 'P': case 'p':
rb_ary_push(a_import, INT2FIX(_T_POINTER));
break;
case 'I': case 'i':
rb_ary_push(a_import, INT2FIX(_T_INTEGER));
break;
}
}
break;
default:
SafeStringValue(import);
s = RSTRING(import)->ptr;
for (i = 0, len = RSTRING(import)->len; i < len; i++) {
switch (*s++) {
case 'N': case 'n': case 'L': case 'l':
rb_ary_push(a_import, INT2FIX(_T_NUMBER));
break;
case 'P': case 'p':
rb_ary_push(a_import, INT2FIX(_T_POINTER));
break;
case 'I': case 'i':
rb_ary_push(a_import, INT2FIX(_T_INTEGER));
break;
}
}
break;
}
if (16 < RARRAY(a_import)->len) {
rb_raise(rb_eRuntimeError, "too many parameters: %d\n", RARRAY(a_import)->len);
}
rb_iv_set(self, "__import__", a_import);
if (NIL_P(export)) {
ex = _T_VOID;
} else {
SafeStringValue(export);
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)
int argc;
VALUE *argv;
VALUE obj;
{
VALUE args;
unsigned long ret;
int i;
struct {
unsigned long params[16];
} param;
#define params param.params
VALUE obj_proc = rb_iv_get(obj, "__proc__");
VALUE obj_import = rb_iv_get(obj, "__import__");
VALUE obj_export = rb_iv_get(obj, "__export__");
FARPROC ApiFunction = (FARPROC)NUM2ULONG(obj_proc);
int items = rb_scan_args(argc, argv, "0*", &args);
int nimport = RARRAY(obj_import)->len;
if (items != nimport)
rb_raise(rb_eRuntimeError, "Wrong number of parameters: expected %d, got %d.\n",
nimport, items);
for (i = 0; i < nimport; i++) {
unsigned long lParam = 0;
switch (FIX2INT(rb_ary_entry(obj_import, i))) {
VALUE str;
case _T_NUMBER:
case _T_INTEGER:
default:
lParam = NUM2ULONG(rb_ary_entry(args, i));
break;
case _T_POINTER:
str = rb_ary_entry(args, i);
if (NIL_P(str)) {
lParam = 0;
} else if (FIXNUM_P(str)) {
lParam = NUM2ULONG(str);
} else {
StringValue(str);
rb_str_modify(str);
lParam = (unsigned long)StringValuePtr(str);
}
break;
}
params[i] = lParam;
}
ret = ApiFunction(param);
switch (FIX2INT(obj_export)) {
case _T_NUMBER:
case _T_INTEGER:
return INT2NUM(ret);
case _T_POINTER:
return rb_str_new2((char *)ret);
case _T_VOID:
default:
return INT2NUM(0);
}
}
void
Init_Win32API()
{
VALUE cWin32API = rb_define_class("Win32API", rb_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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