mkmemfile.c

mkmemfile.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

const int  BYTES_PER_LINES = 20;

int main(int argc, char *argv[]) {
	FILE *in = NULL, *out = NULL;
	int i, cpt=0, first=1;
	size_t val;
	unsigned char value[BYTES_PER_LINES];
	
	if (argc < 2 || argc > 3) {
		printf("%s, converts a file to a char array you can use in your programs.\n", argv[0]);
		printf("Usage : %s path_to_source_file [name_of_the_output_file]\n", argv[0]);
		return -1;
	}
	
	if (!(in = fopen(argv[1], "rb"))) {
		fputs("Failed to open source file !\n", stderr);
		return -1;
	}
	if (argc != 3)
		out = stdout;
	else if(!(out = fopen(argv[2], "wb"))) {
		fputs("Failed to open output file !\n", stderr);
		return -1;
	}
	
	fputs("static const char file_array[] = {\n", out);
	
	while ((val = fread(value, sizeof(char), BYTES_PER_LINES, in)) > 0) {
		if (!first) {
			fputs(",\n", out);
		}
		else first = 0;
		fputc('\t', out);
		
		for (i = 0; i < val; i++) {
			fprintf(out, "0x%2.2x", value[i]);
			if (i != val - 1)
				fputs(", ", out);
		}
		cpt += val;
	}
	fputs("};\n", out);
	fprintf(out, "static const int len = %d;\n", cpt);
	
	fclose(in);
	fclose(out);
	
	return 0;
}