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author | Rob Landley <rob@landley.net> | 2015-07-03 15:19:07 -0500 |
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committer | Rob Landley <rob@landley.net> | 2015-07-03 15:19:07 -0500 |
commit | 6b6daecc7c87746aa0f38a298aecd2c38ee60520 (patch) | |
tree | 9db0ee6d2b39ae9ebbe4ce513d370d4a3ad02b9c /toys/other | |
parent | 9933273c5b7b6e0471d9195e8c2facb795b795ae (diff) | |
download | toybox-6b6daecc7c87746aa0f38a298aecd2c38ee60520.tar.gz |
Promote xxd to other.
Diffstat (limited to 'toys/other')
-rw-r--r-- | toys/other/xxd.c | 65 |
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); +} |