tools/gensdbfs: generate sdbfs image as C header

8b976a25 · Grzegorz Daniluk · 73499adc · 8b976a25
Commit 8b976a25 authored Apr 24, 2020 by Grzegorz Daniluk
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Showing with 45 additions and 2 deletions

gensdbfs.c tools/gensdbfs.c +45 -2

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--- a/tools/gensdbfs.c
+++ b/tools/gensdbfs.c
@@ -503,13 +503,46 @@ static struct sdbf *prepare_dir(char *name, struct sdbf *parent)
 	return tree;
 }

+/*
+ * Generate C header file from sdbfs binary
+ */
+static int gen_header(char *bin_name, char *h_name)
+{
+	FILE *b_file, *h_file;
+	unsigned int buf;
+	int bytes;
+
+	b_file = fopen(bin_name, "r");
+	h_file = fopen(h_name, "w");
+	if (!b_file || !h_file) {
+		fprintf(stderr, "Could not open binary file or create header file\n");
+		return -1;
+	}
+
+	fprintf(h_file, "// generated by tools/gensdbfs. Don't hand-edit unless you know what you're doing...\n");
+
+	while(!feof(b_file)) {
+		buf = 0;
+		bytes = fread(&buf, 1, 4, b_file);
+		if (bytes > 0)
+			fprintf(h_file,"0x%08X,\n", htonl(buf));
+	}
+	/* remove last "," */
+	fseek(h_file, -2, SEEK_END);
+	fprintf(h_file, "\n");
+	fclose(b_file);
+	fclose(h_file);
+	return 1;
+}
+
 /* From now on, it's trivial main program management */
 static int usage(char *prgname)
 {
-	fprintf(stderr, "%s: Use \"%s [<options>] <inputdir> <output>\"\n",
+	fprintf(stderr, "%s: Use \"%s [<options>] <inputdir> <output binary>\"\n",
 		prgname, prgname);
 	fprintf(stderr, "  -b <number> : block size (default 64)\n");
 	fprintf(stderr, "  -s <number> : device size (default: as needed)\n");
+	fprintf(stderr, "  -c <output header> : create C header file with the binary\n");
 	fprintf(stderr, "  a file called \"" CFG_NAME "\", in each "
 		"subdir is used as configuration file\n");
 	exit(1);
@@ -522,9 +555,11 @@ int main(int argc, char **argv)
 	FILE *fout;
 	char *rest;
 	struct sdbf *tree;
+	int gen_c = 0;
+	char *h_filename;

 	prgname = argv[0];
-	while ( (c = getopt(argc, argv, "b:s:")) != -1) {
+	while ( (c = getopt(argc, argv, "b:s:c:")) != -1) {
 		switch (c) {
 		case 'b':
 			blocksize = strtol(optarg, &rest, 0);
@@ -542,6 +577,10 @@ int main(int argc, char **argv)
 				exit(1);
 			}
 			break;
+		case 'c':
+			h_filename = optarg;
+			gen_c = 1;
+			break;
 		}
 	}
 	if (optind != argc - 2)
@@ -589,5 +628,9 @@ int main(int argc, char **argv)
 			" (0x%lx)\n", prgname, lastwritten, devsize);
 		exit(1);
 	}
+
+	if (gen_c)
+		gen_header(argv[optind+1], h_filename);
+
 	exit(0);
 }