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xxd: implement -p

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While at it, tweaked hexdump --help

function                                             old     new   delta
xxd_main                                             364     414     +50
packed_usage                                       31097   31114     +17

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2017-01-25 16:50:30 +01:00
parent cb8e84e65a
commit 62a9b18547
2 changed files with 31 additions and 18 deletions
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19
util-linux/hexdump.c
View File

@ -41,20 +41,21 @@
//usage: "[-bcCdefnosvx" IF_FEATURE_HEXDUMP_REVERSE("R") "] [FILE]..."
//usage:#define hexdump_full_usage "\n\n"
//usage: "Display FILEs (or stdin) in a user specified format\n"
//usage: "\n -b One-byte octal display"
//usage: "\n -c One-byte character display"
//usage: "\n -C Canonical hex+ASCII, 16 bytes per line"
//usage: "\n -d Two-byte decimal display"
//usage: "\n -e FORMAT_STRING"
//usage: "\n -b 1-byte octal display"
//usage: "\n -c 1-byte character display"
//usage: "\n -d 2-byte decimal display"
//usage: "\n -o 2-byte octal display"
//usage: "\n -x 2-byte hex display"
//usage: "\n -C hex+ASCII 16 bytes per line"
//usage: "\n -v Show all (no dup folding)"
//usage: "\n -e FORMAT_STR Example: '16/1 \"%02x|\"\"\\n\"'"
//usage: "\n -f FORMAT_FILE"
// exactly the same help text lines in hexdump and xxd:
//usage: "\n -n LENGTH Interpret only LENGTH bytes of input"
//usage: "\n -o Two-byte octal display"
//usage: "\n -n LENGTH Show only first LENGTH bytes"
//usage: "\n -s OFFSET Skip OFFSET bytes"
//usage: "\n -v Display all input data"
//usage: "\n -x Two-byte hexadecimal display"
//usage: IF_FEATURE_HEXDUMP_REVERSE(
//usage: "\n -R Reverse of 'hexdump -Cv'")
// TODO: NONCOMPAT!!! move -R to xxd -r
//usage:
//usage:#define hd_trivial_usage
//usage: "FILE..."

22
util-linux/hexdump_xxd.c
View File

@ -46,9 +46,11 @@
//usage: "Hex dump FILE (or stdin)\n"
//usage: "\n -g N Bytes per group"
//usage: "\n -c N Bytes per line"
//usage: "\n -p Show only hex bytes, assumes -c30"
// exactly the same help text lines in hexdump and xxd:
//usage: "\n -l LENGTH Interpret only LENGTH bytes of input"
//usage: "\n -l LENGTH Show only first LENGTH bytes"
//usage: "\n -s OFFSET Skip OFFSET bytes"
// TODO: implement -r (see hexdump -R)
#include "libbb.h"
#include "dump.h"
@ -70,11 +72,12 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
#define OPT_l (1 << 0)
#define OPT_s (1 << 1)
#define OPT_a (1 << 2)
#define OPT_p (1 << 3)
opt_complementary = "?1"; /* 1 argument max */
opt = getopt32(argv, "l:s:ag:+c:+", &opt_l, &opt_s, &bytes, &cols);
opt = getopt32(argv, "l:s:apg:+c:+", &opt_l, &opt_s, &bytes, &cols);
argv += optind;
// dumper->dump_vflag = ALL; // default
dumper->dump_vflag = ALL;
// if (opt & OPT_a)
// dumper->dump_vflag = SKIPNUL; ..does not exist
if (opt & OPT_l) {
@ -93,9 +96,16 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
//BUGGY for /proc/version (unseekable?)
}
bb_dump_add(dumper, "\"%08.8_ax: \""); // "address: "
if (opt & OPT_p) {
if (cols == 0)
cols = 30;
bytes = cols; /* -p ignores -gN */
} else {
if (cols == 0)
cols = 16;
bb_dump_add(dumper, "\"%08.8_ax: \""); // "address: "
}
if (bytes < 1 || bytes >= cols) {
sprintf(buf, "%u/1 \"%%02x\"", cols); // cols * "xx"
bb_dump_add(dumper, buf);
@ -109,7 +119,7 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
#define BS "/1 \"%02x \""
#define B "/1 \"%02x\""
unsigned i;
char *bigbuf = xmalloc(1 + cols * (sizeof(BS)-1));
char *bigbuf = xmalloc(cols * (sizeof(BS)-1));
char *p = bigbuf;
for (i = 1; i <= cols; i++) {
if (i == cols || i % bytes)
@ -125,8 +135,10 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
free(bigbuf);
}
if (!(opt & OPT_p)) {
sprintf(buf, "\" \"%u/1 \"%%_p\"\"\n\"", cols); // " ASCII\n"
bb_dump_add(dumper, buf);
}
return bb_dump_dump(dumper, argv);
}