first

Misc/mk_header.c

@@ -0,0 +1,102 @@
+/*
+gcc -Wall mk_header.c -o mk_header
+
+dumps the bytes of given input to a C header as
+comma separated hexadecimal values.  the output
+header can be used in a C source like:
+
+const char bin[] =
+{
+# include "output.h"
+};
+
+*/
+
+#include <stdio.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+
+int main (int argc, char **argv)
+{
+	FILE *f;
+	struct stat s;
+	unsigned char *buf, *ptr;
+	const char *output;
+	long i, j;
+
+	if (argc != 2 && argc != 3)
+	{
+		printf ("Usage: mk_header <input> [output]\n"
+			"Default output file is \"output.h\"\n");
+		return 1;
+	}
+
+	if (stat(argv[1], &s) == -1 ||
+		! S_ISREG(s.st_mode) )
+	{
+		printf ("Couldn't stat %s\n", argv[1]);
+		return 1;
+	}
+
+	if (s.st_size == 0)
+	{
+		printf ("%s is an empty file\n", argv[1]);
+		return 1;
+	}
+
+	buf = (unsigned char *) malloc (s.st_size);
+	if (buf == NULL)
+	{
+		printf ("Couldn't malloc %ld bytes\n",
+					(long)s.st_size);
+		return 1;
+	}
+
+	f = fopen (argv[1], "rb");
+	if (f == NULL)
+	{
+		free(buf);
+		printf ("Couldn't open %s\n", argv[1]);
+		return 1;
+	}
+
+	if (fread (buf, 1, s.st_size, f) != (size_t) s.st_size)
+	{
+		fclose (f);
+		free (buf);
+		printf ("Error reading %s\n", argv[1]);
+		return 1;
+	}
+	fclose (f);
+
+	output = (argc == 3) ? argv[2] : "output.h";
+	f = fopen (output, "wb");
+	if (!f)
+	{
+		free (buf);
+		printf ("Couldn't open %s\n", output);
+		return 1;
+	}
+
+	for (i = 0, j = 0, ptr = buf; i < s.st_size; ++i)
+	{
+		fprintf (f, "0x%02x", *ptr++);
+		if (i == s.st_size - 1)
+			break;
+		fprintf (f, ",");
+		if (++j < 16)
+			fprintf (f, " ");
+		else
+		{
+			j = 0;
+			fprintf (f, "\n");
+		}
+	}
+	fprintf (f, "\n");
+
+	fclose (f);
+	free (buf);
+
+	return 0;
+}
+