Utility improvements.

1 files changed, 107 insertions, 0 deletions

diff --git a/utils/extractbin.c b/utils/extractbin.c
new file mode 100644
index 0000000..aed6163
--- /dev/null
+++ b/utils/extractbin.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright © 2014 IIMarckus <imarckus@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Dump a table of files to individual binary files.
+ */
+
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/* 0x1708000 in Stadium GS */
+
+uint32_t
+getint32BE(FILE *f)
+{
+	uint32_t n;
+	n  = fgetc(f) << 24;
+	n |= fgetc(f) << 16;
+	n |= fgetc(f) << 8;
+	n |= fgetc(f);
+
+	return n;
+}
+
+int
+main(int argc, char *argv[])
+{
+	FILE *rom;
+	FILE *outfile;
+	uint32_t ntables, nentries;
+	uint32_t *tableptrs, *sizes;
+	int i, x, table, entry;
+	char outfilename[16];
+	char *ep;
+	unsigned long long dataoff;
+
+	if (argc != 3) {
+		errx(1, "Usage: extractbin file offset");
+	}
+
+	rom = fopen(argv[1], "rb");
+	if (rom == NULL) {
+		err(1, "Error opening file '%s'", argv[1]);
+	}
+
+	dataoff = strtoull(argv[2], &ep, 0);
+	if (argv[2][0] == '\0' || *ep != '\0') {
+		err(1, "invalid offset '%s'", argv[2]);
+	}
+	if (errno == ERANGE && dataoff == ULLONG_MAX) {
+		err(1, "invalid offset '%s'", argv[2]);
+	}
+	if (dataoff > 64 * 1024 * 1024) {
+		err(1, "invalid offset '%s'", argv[2]);
+	}
+
+	fseek(rom, dataoff + 0xc, SEEK_SET);
+	ntables = getint32BE(rom);
+	tableptrs = reallocarray(NULL, ntables, sizeof(uint32_t));
+	sizes = reallocarray(NULL, ntables, sizeof(uint32_t));
+	if (tableptrs == NULL || sizes == NULL) {
+		err(1, "Could not allocate memory for table table");
+	}
+
+	for (i = 0; i < ntables; ++i) {
+		tableptrs[i] = getint32BE(rom);
+		sizes[i] = getint32BE(rom);
+		getint32BE(rom);
+		getint32BE(rom);
+	}
+	printf("%d tables\n", ntables);
+
+	for (table = 0; table < ntables; ++table) {
+		for (i = 0; i < 16; ++i) {
+			fseek(rom, dataoff + tableptrs[table] + sizes[table] - i - 1, SEEK_SET);
+			if (fgetc(rom) != 0xff) {
+				sizes[table] -= i;
+				break;
+			}
+		}
+		fseek(rom, dataoff + tableptrs[table], SEEK_SET);
+		snprintf(outfilename, sizeof outfilename, "0x%x.bin", ftell(rom));
+		outfile = fopen(outfilename, "wb");
+
+		for (i = 0; i < sizes[table]; ++i) {
+			fputc(fgetc(rom), outfile);
+		}
+		fclose(outfile);
+	}
+}