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/* vi: set sw=4 ts=4:
*
* od.c - Provide octal/hex dumps of data
*
* Copyright 2012 Andre Renaud <andre@bluewatersys.com>
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/od.html
USE_OD(NEWTOY(od, "j#vN#xsodbA:t*", TOYFLAG_USR|TOYFLAG_BIN))
config OD
bool "od"
default y
help
usage: od
*/
#include "toys.h"
#define OD_BLOCK_SIZE 16
#define FLAG_t (1 << 0)
#define FLAG_A (1 << 1)
#define FLAG_b (1 << 2)
#define FLAG_d (1 << 3)
#define FLAG_o (1 << 4)
#define FLAG_s (1 << 5)
#define FLAG_x (1 << 6)
#define FLAG_N (1 << 7)
#define FLAG_v (1 << 8)
DEFINE_GLOBALS(
struct arg_list *output_base;
char *address_base;
long max_count;
long jump_bytes;
)
#define TT this.od
static const char *ascii[] = {
"nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel", "bs", "ht",
"nl", "vt", "ff", "cr", "so", "si", "dle", "dc1", "dc2", "dc3", "dc4",
"nak", "syn", "etb", "can", "em", "sub", "esc", "fs", "gs", "rs",
"us", "sp"};
static void display_line_1(char base, off_t offset, uint8_t *line, int len)
{
while (len--) {
switch (base) {
case 'a': {
int ch = *line & 0x7f;
if (ch < sizeof(ascii)/sizeof(ascii[0]))
printf(" %3s", ascii[ch]);
else if (ch == 127)
printf(" del");
else
printf(" %c", ch);
break;
}
case 'o': printf(" %3.3o", *line); break;
case 'x': printf(" %2.2x", *line); break;
case 'd': printf(" %4d", *(int8_t *)line); break;
case 'u': printf(" %3u", *line); break;
}
line++;
}
}
static void display_line_2(char base, off_t offset, uint16_t *line, int len)
{
while (len--) {
switch (base) {
case 'o': printf(" %6.6o", *line); break;
case 'x': printf(" %4.4x", *line); break;
case 'd': printf(" %6d", *(int16_t*)line); break;
case 'u': printf(" %5u", *line); break;
}
line++;
}
}
static void display_line_4(char base, off_t offset, uint32_t *line, int len)
{
while (len--) {
switch (base) {
case 'o': printf(" %11.11o", *line); break;
case 'x': printf(" %8.8x", *line); break;
case 'd': printf(" %11d", *(int32_t *)line); break;
case 'u': printf(" %10u", *line); break;
case 'f': printf(" %15g", *(float *)line); break;
}
line++;
}
}
static void display_line_8(char base, off_t offset, uint64_t *line, int len)
{
while (len--) {
switch (base) {
//case 'o': printf(" %22.22o", *line); break;
case 'x': printf(" %16.16" PRIx64, *line); break;
case 'd': printf(" %21" PRId64, *(int64_t *)line); break;
case 'u': printf(" %20" PRIu64, *line); break;
case 'f': printf(" %23g", *(double *)line);
}
line++;
}
}
static void display_line(off_t offset, uint8_t *line, int len)
{
struct arg_list *output = TT.output_base;
switch (*TT.address_base) {
case 'o': printf("%8.8zo", offset); break;
case 'd': printf("%7.7zd", offset); break;
case 'x': printf("%6.6zx", offset); break;
case 'n':
default:
break;
}
while (output) {
char base = *output->arg;
int width = atoi(&output->arg[1]);
switch (width) {
case 1: display_line_1(base, offset, line, len); break;
case 2: display_line_2(base, offset, (uint16_t *)line,
(len + 1) / 2); break;
case 4: display_line_4(base, offset, (uint32_t *)line,
(len + 3) / 4); break;
case 8: display_line_8(base, offset, (uint64_t *)line,
(len + 7) / 8); break;
}
output = output->next;
}
printf("\n");
}
static void do_od(int fd, char *name)
{
uint8_t *block[2];
int index = 0;
off_t offset = 0;
int last_match = 0;
block[0] = (uint8_t *)toybuf;
block[1] = (uint8_t *)&toybuf[OD_BLOCK_SIZE];
if (TT.jump_bytes) {
xlseek(fd, TT.jump_bytes, SEEK_SET);
offset = TT.jump_bytes;
}
for (;;) {
int len;
int max_len = OD_BLOCK_SIZE;
if ((toys.optflags & FLAG_N) && offset + OD_BLOCK_SIZE > TT.max_count)
max_len = TT.max_count - offset;
len = xread(fd, block[index], max_len);
if (!len) break;
memset(&block[index][len], 0, OD_BLOCK_SIZE - len);
if (!(toys.optflags & FLAG_v) && offset > 0 &&
memcmp(block[0], block[1], OD_BLOCK_SIZE) == 0)
{
if (!last_match) puts("*");
last_match = 1;
} else {
display_line(offset, block[index], len);
last_match = 0;
}
offset += len;
index = !index;
if (len != OD_BLOCK_SIZE) break;
}
if (!(toys.optflags & FLAG_N) && offset != TT.max_count)
display_line(offset, NULL, 0);
}
static void append_base(char *base)
{
struct arg_list *arg, *prev;
arg = xmalloc(sizeof(struct arg_list));
prev = TT.output_base;
TT.output_base = arg;
arg->arg = base;
arg->next = prev;
}
static void valid_bases(void)
{
struct arg_list *arg = TT.output_base;
while (arg) {
char base = arg->arg[0];
int width = 1;
if (arg->arg[1])
width = atoi(&arg->arg[1]);
switch (base) {
case 'a':
if (width != 1)
error_exit("invalid width for ascii base");
break;
case 'd': case 'x': case 'o': case'u':
if (width != 1 && width != 2 && width != 4 && width != 8)
error_exit("this system doesn't provide a %d-byte type", width);
break;
case 'f':
if (width != 4 && width != 8)
error_exit("this system doesn't provide a %d-byte floating point type",
width);
break;
default:
error_exit("invalid base '%c'", base);
}
arg = arg->next;
};
}
void od_main(void)
{
if (!TT.address_base) TT.address_base = "o";
if (toys.optflags & FLAG_b) append_base("o1");
if (toys.optflags & FLAG_d) append_base("u2");
if (toys.optflags & FLAG_o) append_base("o2");
if (toys.optflags & FLAG_s) append_base("d2");
if (toys.optflags & FLAG_x) append_base("x2");
if (!TT.output_base) append_base("o2");
valid_bases();
loopfiles(toys.optargs, do_od);
}
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