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/* defines.h -- a grab bag of preprocessor utilities
* Copyright (C) 2019 SEIKO EPSON Corporation
*
* License: EPSON END USER SOFTWARE LICENSE
* Author : SEIKO EPSON Corporation
*
* This file is part of Image Scan! for Linux.
* It is distributed under the terms of the EPSON END USER SOFTWARE LICENSE.
*
* You should have received a verbatim copy of the EPSON END USER SOFTWARE
* LICENSE along with the software.
*/
#ifndef defines_h
#define defines_h
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef __cplusplus
extern "C"
{
#endif
/* Assorted constants.
*/
#define MM_PER_INCH 25.4 /* exactly */
#ifndef __cplusplus
/*! A C++ Boolean type and corresponding keywords for our C code.
*/
typedef enum {
false = 0,
true
} bool;
#endif
/* Run-time contract validation.
*/
#include <stdlib.h>
#include "message.h"
#define _assert(type,condition) \
if (!(condition)) \
{ \
err_fatal ("failed: %s (%s)", type, #condition); \
exit (EXIT_FAILURE); \
}
#define require(condition) _assert ("require", condition)
#define promise(condition) _assert ("promise", condition)
/* "Typed" memory allocation convenience wrappers.
* These are meant to make the invocations consistent and take care of
* the casting for you.
*/
#include <alloca.h>
#include <stdlib.h>
#define t_alloca(sz,t) ((t *) alloca ((sz) * sizeof (t)))
#define t_calloc(sz,t) ((t *) calloc ((sz) , sizeof (t)))
#define t_malloc(sz,t) ((t *) malloc ((sz) * sizeof (t)))
#define t_realloc(p,sz,t) ((t *) realloc ((p), (sz) * sizeof (t)))
/* Compute sizes of _statically_ allocated arrays easily.
*/
#define num_of(p) (sizeof (p) / sizeof (*p))
/* Safely release acquired resources.
* The const_delete() is meant for those rare cases where you need to
* clean up const t* typed memory areas.
*/
#define delete(p) do { if (p) free (p); p = 0; } while (0)
#define const_delete(p,t) do { if (p) free ((t) p); p = 0; } while (0)
/* Portable path and file name component separators.
*/
#ifdef __unix
#define PATH_SEP_STR ":"
#define PATH_SEP PATH_SEP_STR[0]
#define FILE_SEP_STR "/"
#define FILE_SEP FILE_SEP_STR[0]
#else
#define PATH_SEP_STR ";"
#define PATH_SEP PATH_SEP_STR[0]
#define FILE_SEP_STR "\\"
#define FILE_SEP FILE_SEP_STR[0]
#endif
typedef unsigned char byte;
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* !defined (defines_h) */
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