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gen.c
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/* gen.c */
/*
* Copyright (c) 2022 Stephen D. Adams <stephen@sdadams.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* The purpose of gen.c is to generate gen.h which contains opaque types that
* may be stack allocated, and are generated from concrete types defined using
* external dependencies. The opaque types may be used without including the
* headers for the external dependencies allowing to keep namespaces clean
* without losing runtime performance. This has two advantages: 1. Namespace
* collisions are less likely, and 2. Compile time is reduced for incremental
* builds. The program, gen, is built from gen.c then used by the Makefile
* like a compiler.
*/
#include <stdio.h>
#include "chk.h"
int
main(int argc, char *argv[])
{
printf("/*\n * Automatically generated, do not edit manually.\n");
printf(" * Read gen.c for more information.\n */\n");
printf("\n#ifndef _GEN_H_\n#define _GEN_H_\n\n");
printf("struct muxfs_chk { uint8_t priv[%lu]; };\n",
sizeof(struct muxfs_chk_p));
printf("\n#endif /* _GEN_H_ */\n");
return 0;
}