1 files changed, 104 insertions, 0 deletions
diff --git a/backend/defines.h b/backend/defines.h
new file mode 100644
index 0000000..9940b7b
--- /dev/null
+++ b/backend/defines.h
@@ -0,0 +1,104 @@
+/*  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) */