incbin() - Revision history

Vegard: /* See also */ add link

2020-04-28T11:33:02Z

Vegard: add links

2020-04-28T11:32:12Z

add links

← Older revision		Revision as of 11:32, 28 April 2020
Line 48:		Line 48:

	It should also work for C with some minor changes.		It should also work for C with some minor changes.

			== See also ==

			* https://gist.github.com/mmozeiko/ed9655cf50341553d282
			* http://smackerelofopinion.blogspot.com/2015/12/incorporating-and-accesses-binary-data.html

	[[Category:Programming]]		[[Category:Programming]]

Vegard: add category

2020-03-01T11:54:06Z

add category

← Older revision		Revision as of 11:54, 1 March 2020
Line 52:		Line 52:
	[[Category:C]]		[[Category:C]]
	[[Category:C++]]		[[Category:C++]]
			[[Category:C preprocessor snippets]]

Vegard: new page

2019-12-14T17:22:03Z

new page

New page

To include binary files directly in a C++ program without using an external tool you can use this handy macro (probably only works with the GNU assembler, though):

<source lang="C++">
#include <stdio.h>

struct binfile {
char *data;
size_t size;

binfile(char *data, size_t size):
data(data),
size(size)
{
}
};

#define _CONCAT(x, y) x##y
#define CONCAT(x, y) _CONCAT(x, y)

#define _STRINGIFY(x) #x
#define STRINGIFY(x) _STRINGIFY(x)

#define incbin(filename) \
({ \
extern char CONCAT(incbin_data, __LINE__)[]; \
extern unsigned long CONCAT(incbin_data_size, __LINE__); \
asm (".pushsection .rodata, \"a\" ;" \
".global incbin_data" STRINGIFY(__LINE__) " ;" \
"incbin_data" STRINGIFY(__LINE__) ": ;" \
".incbin " STRINGIFY(filename) " ;" \
"incbin_data_end" STRINGIFY(__LINE__) ": ;" \
".byte 0 ;" \
".global incbin_data_size" STRINGIFY(__LINE__) " ;" \
"incbin_data_size" STRINGIFY(__LINE__) ": ;" \
".quad (incbin_data_end" STRINGIFY(__LINE__) " - incbin_data" STRINGIFY(__LINE__) ") ;" \
".popsection"); \
binfile(CONCAT(incbin_data, __LINE__), \
CONCAT(incbin_data_size, __LINE__)); \
})

int main(int argc, char *argv[])
{
auto v = incbin("/etc/passwd");
fwrite(v.data, 1, v.size, stdout);
return 0;
}
</source>

It should also work for C with some minor changes.

[[Category:Programming]]
[[Category:C]]
[[Category:C++]]

← Older revision		Revision as of 11:33, 28 April 2020
Line 52:		Line 52:

	* https://gist.github.com/mmozeiko/ed9655cf50341553d282		* https://gist.github.com/mmozeiko/ed9655cf50341553d282
			* https://github.com/graphitemaster/incbin
	* http://smackerelofopinion.blogspot.com/2015/12/incorporating-and-accesses-binary-data.html		* http://smackerelofopinion.blogspot.com/2015/12/incorporating-and-accesses-binary-data.html