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compat: move hexdump -R functionality to xxd -r

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function                                             old     new   delta
xxd_main                                             466     680    +214
packed_usage                                       33474   33483      +9
hexdump_opts                                          17      16      -1
hexdump_main                                         565     401    -164
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(add/remove: 0/0 grow/shrink: 2/2 up/down: 223/-165)           Total: 58 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2020-10-25 16:06:45 +01:00
parent e16f7eb596
commit 32e1f69ae0
2 changed files with 73 additions and 64 deletions
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61
util-linux/hexdump.c
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@@ -15,16 +15,6 @@
//config: The hexdump utility is used to display binary data in a readable
//config: way that is comparable to the output from most hex editors.
//config:
//config:config FEATURE_HEXDUMP_REVERSE
//config: bool "Support -R, reverse of 'hexdump -Cv'"
//config: default y
//config: depends on HEXDUMP
//config: help
//config: The hexdump utility is used to display binary data in an ascii
//config: readable way. This option creates binary data from an ascii input.
//config: NB: this option is non-standard. It's unwise to use it in scripts
//config: aimed to be portable.
//config:
//config:config HD
//config: bool "hd (7.8 kb)"
//config: default y
@@ -38,7 +28,7 @@
//kbuild:lib-$(CONFIG_HD) += hexdump.o
//usage:#define hexdump_trivial_usage
//usage: "[-bcCdefnosvx" IF_FEATURE_HEXDUMP_REVERSE("R") "] [FILE]..."
//usage: "[-bcCdefnosvx] [FILE]..."
//usage:#define hexdump_full_usage "\n\n"
//usage: "Display FILEs (or stdin) in a user specified format\n"
//usage: "\n -b 1-byte octal display"
@@ -53,9 +43,6 @@
// exactly the same help text lines in hexdump and xxd:
//usage: "\n -n LENGTH Show only first LENGTH bytes"
//usage: "\n -s OFFSET Skip OFFSET bytes"
//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..."
@@ -94,7 +81,7 @@ static const char *const add_strings[] = {
static const char add_first[] ALIGN1 = "\"%07.7_Ax\n\"";
static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v" IF_FEATURE_HEXDUMP_REVERSE("R");
static const char hexdump_opts[] ALIGN1 = "bcdoxCe:f:n:s:v";
int hexdump_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int hexdump_main(int argc, char **argv)
@@ -102,10 +89,6 @@ int hexdump_main(int argc, char **argv)
dumper_t *dumper = alloc_dumper();
const char *p;
int ch;
#if ENABLE_FEATURE_HEXDUMP_REVERSE
FILE *fp;
smallint rdump = 0;
#endif
if (ENABLE_HD
&& (!ENABLE_HEXDUMP || !applet_name[2])
@@ -153,11 +136,6 @@ int hexdump_main(int argc, char **argv)
if (ch == 'v') {
dumper->dump_vflag = ALL;
}
#if ENABLE_FEATURE_HEXDUMP_REVERSE
if (ch == 'R') {
rdump = 1;
}
#endif
}
if (!dumper->fshead) {
@@ -167,40 +145,5 @@ int hexdump_main(int argc, char **argv)
argv += optind;
#if !ENABLE_FEATURE_HEXDUMP_REVERSE
return bb_dump_dump(dumper, argv);
#else
if (!rdump) {
return bb_dump_dump(dumper, argv);
}
/* -R: reverse of 'hexdump -Cv' */
fp = stdin;
if (!*argv) {
argv--;
goto jump_in;
}
do {
char *buf;
fp = xfopen_for_read(*argv);
jump_in:
while ((buf = xmalloc_fgetline(fp)) != NULL) {
p = buf;
while (1) {
/* skip address or previous byte */
while (isxdigit(*p)) p++;
while (*p == ' ') p++;
/* '|' char will break the line */
if (!isxdigit(*p) || sscanf(p, "%x ", &ch) != 1)
break;
putchar(ch);
}
free(buf);
}
fclose(fp);
} while (*++argv);
fflush_stdout_and_exit(EXIT_SUCCESS);
#endif
}