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xxd: implement -i "C style output"

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function                                             old     new   delta
xxd_main                                             710     888    +178
.rodata                                           103252  103331     +79
print_C_style                                          -      78     +78
packed_usage                                       33639   33652     +13
next                                                 276     278      +2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/0 up/down: 350/0)             Total: 350 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-06-18 00:59:17 +02:00
parent 25fe2d50bd
commit 2c436679fb
3 changed files with 53 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/dump.h
View File

@ -34,6 +34,7 @@ typedef struct dumper_t {
smallint dump_vflag; /*enum dump_vflag_t*/
FS *fshead;
const char *xxd_eofstring;
off_t address; /* address/offset in stream */
long long xxd_displayoff;
} dumper_t;

29
libbb/dump.c
View File

@ -34,7 +34,6 @@ typedef struct priv_dumper_t {
FU *endfu;
off_t savaddress; /* saved address/offset in stream */
off_t eaddress; /* end address */
off_t address; /* address/offset in stream */
int blocksize;
smallint exitval; /* final exit value */
@ -335,14 +334,14 @@ static void do_skip(priv_dumper_t *dumper, const char *fname)
) {
/* If st_size is valid and pub.dump_skip >= st_size */
dumper->pub.dump_skip -= sbuf.st_size;
dumper->address += sbuf.st_size;
dumper->pub.address += sbuf.st_size;
return;
}
if (fseeko(stdin, dumper->pub.dump_skip, SEEK_SET)) {
bb_simple_perror_msg_and_die(fname);
}
dumper->address += dumper->pub.dump_skip;
dumper->savaddress = dumper->address;
dumper->pub.address += dumper->pub.dump_skip;
dumper->savaddress = dumper->pub.address;
dumper->pub.dump_skip = 0;
}
@ -381,7 +380,7 @@ static unsigned char *get(priv_dumper_t *dumper)
int blocksize = dumper->blocksize;
if (!dumper->get__curp) {
dumper->address = (off_t)0; /*DBU:[dave@cray.com] initialize,initialize..*/
dumper->pub.address = (off_t)0; /*DBU:[dave@cray.com] initialize,initialize..*/
dumper->get__curp = xmalloc(blocksize);
dumper->get__savp = xzalloc(blocksize); /* need to be initialized */
} else {
@ -389,7 +388,7 @@ static unsigned char *get(priv_dumper_t *dumper)
dumper->get__curp = dumper->get__savp;
dumper->get__savp = tmp;
dumper->savaddress += blocksize;
dumper->address = dumper->savaddress;
dumper->pub.address = dumper->savaddress;
}
need = blocksize;
nread = 0;
@ -412,7 +411,7 @@ static unsigned char *get(priv_dumper_t *dumper)
}
}
memset(dumper->get__curp + nread, 0, need);
dumper->eaddress = dumper->address + nread;
dumper->eaddress = dumper->pub.address + nread;
return dumper->get__curp;
}
n = fread(dumper->get__curp + nread, sizeof(unsigned char),
@ -444,7 +443,7 @@ static unsigned char *get(priv_dumper_t *dumper)
}
dumper->pub.dump_vflag = DUP;
dumper->savaddress += blocksize;
dumper->address = dumper->savaddress;
dumper->pub.address = dumper->savaddress;
need = blocksize;
nread = 0;
} else {
@ -545,8 +544,8 @@ static void display(priv_dumper_t* dumper)
fs = dumper->pub.fshead;
savebp = bp;
saveaddress = dumper->address;
for (; fs; fs = fs->nextfs, bp = savebp, dumper->address = saveaddress) {
saveaddress = dumper->pub.address;
for (; fs; fs = fs->nextfs, bp = savebp, dumper->pub.address = saveaddress) {
FU *fu;
for (fu = fs->nextfu; fu; fu = fu->nextfu) {
int cnt;
@ -555,10 +554,10 @@ static void display(priv_dumper_t* dumper)
}
for (cnt = fu->reps; cnt; --cnt) {
PR *pr;
for (pr = fu->nextpr; pr; dumper->address += pr->bcnt,
for (pr = fu->nextpr; pr; dumper->pub.address += pr->bcnt,
bp += pr->bcnt, pr = pr->nextpr) {
if (dumper->eaddress
&& dumper->address >= dumper->eaddress
&& dumper->pub.address >= dumper->eaddress
) {
if (dumper->pub.xxd_eofstring) {
/* xxd support: requested to not pad incomplete blocks */
@ -574,7 +573,7 @@ static void display(priv_dumper_t* dumper)
}
switch (pr->flags) {
case F_ADDRESS:
printf(pr->fmt, (unsigned long long) dumper->address + dumper->pub.xxd_displayoff);
printf(pr->fmt, (unsigned long long) dumper->pub.address + dumper->pub.xxd_displayoff);
break;
case F_BPAD:
printf(pr->fmt, "");
@ -668,10 +667,10 @@ static void display(priv_dumper_t* dumper)
* of blocksize, and no partial block ever found.
*/
if (!dumper->eaddress) {
if (!dumper->address) {
if (!dumper->pub.address) {
return;
}
dumper->eaddress = dumper->address;
dumper->eaddress = dumper->pub.address;
}
for (pr = dumper->endfu->nextpr; pr; pr = pr->nextpr) {
switch (pr->flags) {

49
util-linux/hexdump_xxd.c
View File

@ -41,12 +41,13 @@
// -u use upper case hex letters.
//usage:#define xxd_trivial_usage
//usage: "[-pr] [-g N] [-c N] [-n LEN] [-s OFS] [-o OFS] [FILE]"
//usage: "[-pri] [-g N] [-c N] [-n LEN] [-s OFS] [-o OFS] [FILE]"
//usage:#define xxd_full_usage "\n\n"
//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"
//usage: "\n -i C include file style"
// exactly the same help text lines in hexdump and xxd:
//usage: "\n -l LENGTH Show only first LENGTH bytes"
//usage: "\n -s OFFSET Skip OFFSET bytes"
@ -62,10 +63,11 @@
#define OPT_s (1 << 1)
#define OPT_a (1 << 2)
#define OPT_p (1 << 3)
#define OPT_r (1 << 4)
#define OPT_g (1 << 5)
#define OPT_c (1 << 6)
#define OPT_o (1 << 7)
#define OPT_i (1 << 4)
#define OPT_r (1 << 5)
#define OPT_g (1 << 6)
#define OPT_c (1 << 7)
#define OPT_o (1 << 8)
static void reverse(unsigned opt, unsigned cols, const char *filename)
{
@ -126,6 +128,15 @@ static void reverse(unsigned opt, unsigned cols, const char *filename)
fflush_stdout_and_exit(EXIT_SUCCESS);
}
static void print_C_style(const char *p, const char *hdr)
{
printf(hdr, isdigit(p[0]) ? "__" : "");
while (*p) {
bb_putchar(isalnum(*p) ? *p : '_');
p++;
}
}
int xxd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int xxd_main(int argc UNUSED_PARAM, char **argv)
{
@ -135,10 +146,11 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
unsigned bytes = 2;
unsigned cols = 0;
unsigned opt;
int r;
dumper = alloc_dumper();
opt = getopt32(argv, "^" "l:s:aprg:+c:+o:" "\0" "?1" /* 1 argument max */,
opt = getopt32(argv, "^" "l:s:apirg:+c:+o:" "\0" "?1" /* 1 argument max */,
&opt_l, &opt_s, &bytes, &cols, &opt_o
);
argv += optind;
@ -173,8 +185,11 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
bytes = cols; /* -p ignores -gN */
} else {
if (cols == 0)
cols = 16;
bb_dump_add(dumper, "\"%08.8_ax: \""); // "address: "
cols = (opt & OPT_i) ? 12 : 16;
if (opt & OPT_i)
bytes = 1; /* -i ignores -gN */
else
bb_dump_add(dumper, "\"%08.8_ax: \""); // "address: "
}
if (opt & OPT_r) {
@ -186,7 +201,10 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
bb_dump_add(dumper, buf);
}
else if (bytes == 1) {
sprintf(buf, "%u/1 \"%%02x \"", cols); // cols * "xx "
if (opt & OPT_i)
sprintf(buf, "%u/1 \" 0x%%02x,\"", cols); // cols * " 0xxx,"
else
sprintf(buf, "%u/1 \"%%02x \"", cols); // cols * "xx "
bb_dump_add(dumper, buf);
}
else {
@ -210,7 +228,7 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
free(bigbuf);
}
if (!(opt & OPT_p)) {
if (!(opt & (OPT_p|OPT_i))) {
sprintf(buf, "\" \"%u/1 \"%%_p\"\"\n\"", cols); // " ASCII\n"
bb_dump_add(dumper, buf);
} else {
@ -218,5 +236,14 @@ int xxd_main(int argc UNUSED_PARAM, char **argv)
dumper->xxd_eofstring = "\n";
}
return bb_dump_dump(dumper, argv);
if ((opt & OPT_i) && argv[0]) {
print_C_style(argv[0], "unsigned char %s");
printf("[] = {\n");
}
r = bb_dump_dump(dumper, argv);
if (r == 0 && (opt & OPT_i) && argv[0]) {
print_C_style(argv[0], "};\nunsigned int %s");
printf("_len = %"OFF_FMT"u;\n", dumper->address);
}
return r;
}