1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 /*
18  * pagebundler converts the given file into a valid C program that can
19  * be compiled.  The generated code provides a variable that holds the
20  * original file.
21  *
22  * Usage: pagebundler -f file -v varname > outfile
23  */
24 
25 #include <errno.h>
26 #include <stdio.h>
27 #include <unistd.h>
28 #include <string.h>
29 
30 const char *file;
31 const char *varname;
32 
33 int
34 main(int argc, char **argv)
35 {
36 	size_t len, r, i;
37 	int ch;
38 	FILE *f;
39 	uint8_t buf[64];
40 
41 	while ((ch = getopt(argc, argv, "f:v:")) != -1) {
42 		switch (ch) {
43 		case 'f':
44 			file = optarg;
45 			break;
46 		case 'v':
47 			varname = optarg;
48 			break;
49 		default:
50 			fprintf(stderr, "%s: wrong usage\n",
51 			    argv[0]);
52 			return 1;
53 		}
54 	}
55 
56 	if (file == NULL || varname == NULL) {
57 		fprintf(stderr, "%s: wrong usage\n", argv[0]);
58 		return 1;
59 	}
60 
61 	if ((f = fopen(file, "r")) == NULL) {
62 		fprintf(stderr, "%s: can't open %s: %s",
63 		    argv[0], file, strerror(errno));
64 	}
65 
66         printf("const uint8_t %s[] = {\n", varname);
67 
68 	len = 0;
69         for (;;) {
70 		r = fread(buf, 1, sizeof(buf), f);
71 		len += r;
72 
73 		printf("\t");
74 		for (i = 0; i < r; ++i) {
75 			printf("0x%x, ", buf[i]);
76 		}
77 		printf("\n");
78 
79 		if (r != sizeof(buf))
80 			break;
81 	}
82 
83 	len++;
84 	printf("\t0x00\n");
85 	printf("}; /* %s */\n", varname);
86 
87 	printf("size_t %s_len = %zu;\n", varname, len);
88 
89 	fclose(f);
90 	return 0;
91 }