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/**
** @brief A toy example for a usage of the #embed directive.
**
** We just embed the source of this program into the executable and
** print it.
**
** If the #embed directive is entirely supported, the preprocessor
** should do macro expansion of `__FILE__`. If the directory of the
** source file is in the include path for embed.c, the source should
** just be included like that.
**
** If the directive is not supported you could try to compile this
** anyhow by using https://sentido-labs.com/en/library/cedro/. Cedro
** does not allow to do macro expansion for the argument of the
** directive, so we have to give this explicitly.
**
** For the example itself to output properly, the source and
** execution encoding should not be too different.
**/
#include "c23-fallback.h"
#include <stdio.h>
#include <string.h>
// define a character array that will contain the entire
// source file
static char const here[] = {
// Cedro does not work with blanks between the # and any directive
#pragma Cedro 1.0 embed
#embed "embed.c"
};
// define another character array that has the same size
static char there[sizeof here];
int main(int argc, char* argv[static argc+1]) {
size_t ibytes = 0;
int cmp = 1000;
// Open the file in binary mode.
FILE* inp = fopen(__FILE__, "rb");
if (inp) {
// read the file as binary
ibytes = fread(there, 1, sizeof there, inp);
cmp = memcmp(here, there, sizeof here);
fclose(inp);
} else {
printf("could not open %s\n", __FILE__);
printf("+++++++++++++++++++++++++++++++++++++++++++++++\n");
}
size_t obytes = fwrite(here, 1, sizeof here, stdout);
printf("+++++++++++++++++++++++++++++++++++++++++++++++\n");
printf("in %zu, out %zu, bytes are %s\n",
ibytes, obytes,
cmp < 0 ? "smaller" : (cmp > 0 ? "greater" : "equal"));
}
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