/* ************************************************************************** */
/*                                       _____           _                    */
/*  p7os/prepare.c                      |_   _|__  _   _| |__   ___ _   _     */
/*  | Project: p7utils                    | |/ _ \| | | | '_ \ / _ \ | | |    */
/*                                        | | (_) | |_| | | | |  __/ |_| |    */
/*  By: thomas <thomas@touhey.fr>         |_|\___/ \__,_|_| |_|\___|\__, |.fr */
/*  Last updated: 2017/01/16 23:56:41                               |___/     */
/*                                                                            */
/* ************************************************************************** */
#include "main.h"

/* ************************************************************************** */
/*  Error messages                                                            */
/* ************************************************************************** */
/* Unable to open the embedded thingy */
static const char error_fmemopen[] =
"Unable to open the embedded update.exe.\n";

/* ************************************************************************** */
/*  Embedded update.exe                                                       */
/* ************************************************************************** */
#define cake_exe_str (_binary_cake_exe_bin_start)
#define cake_exe_end (_binary_cake_exe_bin_end)
extern char _binary_cake_exe_bin_start[];
extern char _binary_cake_exe_bin_end[];

/* ************************************************************************** */
/*  Main function                                                             */
/* ************************************************************************** */
/**
 *	prepare_ops:
 *	Prepare the operation, by uploading the update.exe.
 *
 *	@arg	handle		the libp7 handle.
 *	@arg	uexe		the update.exe to use (NULL if use the embedded one).
 *	@return				the error (-1 if not a libp7 error, 0 if ok)
 */

int prepare_ops(p7_handle_t *handle, FILE *uexe, void (*disp)())
{
	int err; size_t usize;

	/* prepare the update.exe */
	if (uexe) {
		/* calculate the size */
		fseek(uexe, 0, SEEK_END);
		usize = ftell(uexe);
		fseek(uexe, 0, SEEK_SET);
	} else {
		/* take the default uexe */
		usize = (size_t)&cake_exe_end - (size_t)&cake_exe_str;
		uexe = fmemopen(cake_exe_str, usize, "r");
		if (!uexe) {
			fprintf(stderr, error_fmemopen);
			return (-1);
		}
	}

	/* send the thing */
	if ((err = p7_sendexe_stream(handle, uexe, (p7uint_t)usize,
		0x88030000, 0x88030000, disp))) {
		fclose(uexe);
		return (err);
	}

	/* no error! */
	fclose(uexe);
	return (0);
}