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authorRob Landley <rob@landley.net>2015-07-03 15:19:07 -0500
committerRob Landley <rob@landley.net>2015-07-03 15:19:07 -0500
commit6b6daecc7c87746aa0f38a298aecd2c38ee60520 (patch)
tree9db0ee6d2b39ae9ebbe4ce513d370d4a3ad02b9c /toys/other
parent9933273c5b7b6e0471d9195e8c2facb795b795ae (diff)
downloadtoybox-6b6daecc7c87746aa0f38a298aecd2c38ee60520.tar.gz
Promote xxd to other.
Diffstat (limited to 'toys/other')
-rw-r--r--toys/other/xxd.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/toys/other/xxd.c b/toys/other/xxd.c
new file mode 100644
index 00000000..e9ad8393
--- /dev/null
+++ b/toys/other/xxd.c
@@ -0,0 +1,65 @@
+/* xxd.c - hexdump.
+ *
+ * Copyright 2015 The Android Open Source Project
+ *
+ * No obvious standard, output looks like:
+ * 0000000: 4c69 6e75 7820 7665 7273 696f 6e20 332e Linux version 3.
+ *
+ * TODO: support for reversing a hexdump back into the original data.
+ * TODO: -s seek
+
+USE_XXD(NEWTOY(xxd, ">1c#<1>4096=16l#g#<1=2", TOYFLAG_USR|TOYFLAG_BIN))
+
+config XXD
+ bool "xxd"
+ default y
+ help
+ usage: xxd [-c n] [-g n] [-l n] [file]
+
+ Hexdump a file to stdout. If no file is listed, copy from stdin.
+ Filename "-" is a synonym for stdin.
+
+ -c n Show n bytes per line (default 16).
+ -g n Group bytes by adding a ' ' every n bytes (default 2).
+ -l n Limit of n bytes before stopping (default is no limit).
+*/
+
+#define FOR_xxd
+#include "toys.h"
+
+GLOBALS(
+ long g;
+ long l;
+ long c;
+)
+
+static void do_xxd(int fd, char *name)
+{
+ long long pos = 0;
+ int i, len, space;
+
+ while (0<(len = readall(fd, toybuf, (TT.l && TT.l-pos<TT.c)?TT.l-pos:TT.c))) {
+ printf("%08llx: ", pos);
+ pos += len;
+ space = 2*TT.c+TT.c/TT.g+1;
+
+ for (i=0; i<len;) {
+ space -= printf("%02x", toybuf[i]);
+ if (!(++i%TT.g)) {
+ putchar(' ');
+ space--;
+ }
+ }
+
+ printf("%*s", space, "");
+ for (i=0; i<len; i++)
+ putchar((toybuf[i]>=' ' && toybuf[i]<='~') ? toybuf[i] : '.');
+ putchar('\n');
+ }
+ if (len<0) perror_exit("read");
+}
+
+void xxd_main(void)
+{
+ loopfiles(toys.optargs, do_xxd);
+}