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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1998 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
#include <string.h>
#include <wtypes.h>
#include <winbase.h>
#include <process.h>
#include "../byterun/exec.h"
char * default_runtime_name = "ocamlrun";
static unsigned long read_size(char * ptr)
{
unsigned char * p = (unsigned char *) ptr;
return ((unsigned long) p[0] << 24) + ((unsigned long) p[1] << 16) +
((unsigned long) p[2] << 8) + p[3];
}
static char * read_runtime_path(HANDLE h)
{
char buffer[TRAILER_SIZE];
static char runtime_path[MAX_PATH];
DWORD nread;
struct exec_trailer tr;
long size;
if (SetFilePointer(h, -TRAILER_SIZE, NULL, FILE_END) == -1) return NULL;
if (! ReadFile(h, buffer, TRAILER_SIZE, &nread, NULL)) return NULL;
if (nread != TRAILER_SIZE) return NULL;
tr.path_size = read_size(buffer);
tr.code_size = read_size(buffer + 4);
tr.prim_size = read_size(buffer + 8);
tr.data_size = read_size(buffer + 12);
tr.symbol_size = read_size(buffer + 16);
tr.debug_size = read_size(buffer + 20);
if (tr.path_size >= MAX_PATH) return NULL;
if (tr.path_size == 0) return default_runtime_name;
size = tr.path_size + tr.code_size + tr.prim_size +
tr.data_size + tr.symbol_size + tr.debug_size + TRAILER_SIZE;
if (SetFilePointer(h, -size, NULL, FILE_END) == -1) return NULL;
if (! ReadFile(h, runtime_path, tr.path_size, &nread, NULL)) return NULL;
if (nread != tr.path_size) return NULL;
runtime_path[tr.path_size - 1] = 0;
return runtime_path;
}
static void errwrite(char * msg)
{
DWORD numwritten;
WriteFile(GetStdHandle(STD_ERROR_HANDLE), msg, strlen(msg),
&numwritten, NULL);
}
int main(int argc, char ** argv)
{
char truename[MAX_PATH];
char * cmdline = GetCommandLine();
char * runtime_path;
HANDLE h;
int retcode;
GetModuleFileName(NULL, truename, sizeof(truename));
h = CreateFile(truename, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, NULL);
if (h == INVALID_HANDLE_VALUE ||
(runtime_path = read_runtime_path(h)) == NULL) {
errwrite(truename);
errwrite(" not found or is not a bytecode executable file\r\n");
return 2;
}
CloseHandle(h);
retcode = spawnlp(P_WAIT, runtime_path, cmdline, NULL);
/* We use P_WAIT instead of P_OVERLAY here because under NT,
P_OVERLAY returns to the command interpreter, displaying the prompt
before executing the command. */
if (retcode == -1) {
errwrite("Cannot exec ");
errwrite(runtime_path);
errwrite("\r\n");
return 2;
}
return retcode;
}
/* Prevent VC++ from linking its own _setargv function, which
performs command-line processing (we don't need it) */
static void _setargv() { }
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