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/***********************************************************************/
/* */
/* CamlIDL */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1999 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License. */
/* */
/***********************************************************************/
/* $Id: comerror.c,v 1.11 2001/06/17 10:51:24 xleroy Exp $ */
/* Error handling */
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <caml/mlvalues.h>
#include <caml/memory.h>
#include <caml/callback.h>
#include <caml/fail.h>
#include <caml/alloc.h>
#include "camlidlruntime.h"
#include "comstuff.h"
static void camlidl_raise_error(HRESULT errcode, char * who, char * msg)
{
static value * com_error_exn = NULL;
value bucket, vwho = Val_unit, vmsg = Val_unit;
if (com_error_exn == NULL) {
com_error_exn = caml_named_value("Com.Error");
if (com_error_exn == NULL)
invalid_argument("Exception Com.Error not initialized");
}
Begin_roots2(vwho,vmsg)
vwho = copy_string(who);
vmsg = copy_string(msg);
bucket = alloc_small(4, 0);
Field(bucket, 0) = *com_error_exn;
Field(bucket, 1) = Val_long(errcode);
Field(bucket, 2) = vwho;
Field(bucket, 3) = vmsg;
End_roots();
mlraise(bucket);
}
void camlidl_error(HRESULT errcode, char * who, char * what)
{
char msg[1024];
if (what == NULL) {
#ifdef _WIN32
if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
NULL, /* message source */
errcode,
0, /* language */
msg, /* message buffer */
sizeof(msg),/* max size */
NULL) /* inserts */
!= 0)
what = msg;
else
what = "Unknown error";
#else
what = "Unknown error";
#endif
}
camlidl_raise_error(errcode, who, what);
}
static void camlidl_hresult_error(HRESULT errcode)
{
/* Build text representation of errcode */
#ifdef _WIN32
interface IErrorInfo * errinfo = NULL;
BSTR source, descr;
char who[1024], what[1024];
/* Try to use GetErrorInfo */
GetErrorInfo(0L, &errinfo);
if (errinfo != NULL) {
errinfo->lpVtbl->GetSource(errinfo, &source);
_snprintf(who, sizeof(who) - 1, "%ls", source);
who[sizeof(who) - 1] = 0;
errinfo->lpVtbl->GetDescription(errinfo, &descr);
_snprintf(what, sizeof(who) - 1, "%ls", descr);
what[sizeof(what) - 1] = 0;
SysFreeString(source);
SysFreeString(descr);
errinfo->lpVtbl->Release(errinfo);
camlidl_error(errcode, who, what);
} else {
camlidl_error(errcode, "", NULL);
}
#else
camlidl_error(errcode, "", NULL);
#endif
}
void camlidl_check_hresult(HRESULT hr)
{
if (FAILED(hr)) camlidl_hresult_error(hr);
}
value camlidl_c2ml_Com_HRESULT_bool(HRESULT_bool * hr, camlidl_ctx ctx)
{
return Val_bool(*hr == S_OK);
}
void camlidl_ml2c_Com_HRESULT_bool(value v, HRESULT * hr, camlidl_ctx ctx)
{
*hr = Bool_val(v) ? S_OK : S_FALSE;
}
value camlidl_c2ml_Com_HRESULT_int(HRESULT_int * hr, camlidl_ctx ctx)
{
return Val_int(HRESULT_CODE(*hr));
}
void camlidl_ml2c_Com_HRESULT_int(value v, HRESULT * hr, camlidl_ctx ctx)
{
*hr = MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, Int_val(v) & 0xFFFF);
}
HRESULT camlidl_result_exception(char * methname, value exn_bucket)
{
/* TODO: clever mapping of exception to HRESULTS ? */
#ifdef _WIN32
interface ICreateErrorInfo * createrr;
interface IErrorInfo * errinfo;
int wstrlen;
wchar_t * wstr;
char * exndesc;
if (SUCCEEDED(CreateErrorInfo(&createrr))) {
wstrlen = strlen(methname);
wstr = (wchar_t *) malloc((wstrlen + 1) * sizeof(wchar_t));
if (wstr != NULL) {
mbstowcs(wstr, methname, wstrlen + 1);
createrr->lpVtbl->SetSource(createrr, wstr);
free(wstr);
}
exndesc = format_caml_exception(exn_bucket);
if (exndesc != NULL) {
wstrlen = strlen(exndesc);
wstr = (wchar_t *) malloc((wstrlen + 1) * sizeof(wchar_t));
if (wstr != NULL) {
mbstowcs(wstr, exndesc, wstrlen + 1);
createrr->lpVtbl->SetDescription(createrr, wstr);
free(wstr);
}
free(exndesc);
}
if (SUCCEEDED(createrr->lpVtbl->QueryInterface(createrr,
&IID_IErrorInfo,
(void **) &errinfo))) {
SetErrorInfo(0L, errinfo);
errinfo->lpVtbl->Release(errinfo);
}
createrr->lpVtbl->Release(createrr);
}
#endif
return MAKE_HRESULT(SEVERITY_ERROR, FACILITY_ITF, 0x200);
}
void camlidl_uncaught_exception(char * methname, value exn_bucket)
{
char * msg = format_caml_exception(exn_bucket);
fprintf(stderr, "Uncaught exception in COM method %s: %s\n",
methname, msg);
free(msg);
exit(2);
}
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