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- /* od.c - Provide octal/hex dumps of data
- *
- * Copyright 2012 Andre Renaud <andre@bluewatersys.com>
- * Copyright 2012 Rob Landley <rob@landley.net>
- *
- * See http://opengroup.org/onlinepubs/9699919799/utilities/od.html
- USE_OD(NEWTOY(od, "j#vw#<1=16N#xsodcbA:t*", TOYFLAG_USR|TOYFLAG_BIN))
- config OD
- bool "od"
- default y
- help
- usage: od [-bcdosxv] [-j #] [-N #] [-w #] [-A doxn] [-t acdfoux[#]]
- Dump data in octal/hex.
- -A Address base (decimal, octal, hexadecimal, none)
- -j Skip this many bytes of input
- -N Stop dumping after this many bytes
- -t Output type a(scii) c(har) d(ecimal) f(loat) o(ctal) u(nsigned) (he)x
- plus optional size in bytes
- aliases: -b=-t o1, -c=-t c, -d=-t u2, -o=-t o2, -s=-t d2, -x=-t x2
- -v Don't collapse repeated lines together
- -w Total line width in bytes (default 16)
- */
- #define FOR_od
- #include "toys.h"
- GLOBALS(
- struct arg_list *t;
- char *A;
- long N, w, j;
- int address_idx;
- unsigned types, leftover, star;
- char *buf; // Points to buffers[0] or buffers[1].
- char *bufs[2]; // Used to detect duplicate lines.
- off_t pos;
- )
- static char *ascii = "nulsohstxetxeotenqackbel bs ht nl vt ff cr so si"
- "dledc1dc2dc3dc4naksynetbcan emsubesc fs gs rs us sp";
- struct odtype {
- int type;
- int size;
- };
- static int od_out_t(struct odtype *t, char *buf, int *offset)
- {
- unsigned k;
- int throw = 0, pad = 0;
- // Handle ascii
- if (t->type < 2) {
- char c = TT.buf[(*offset)++];
- pad += 4;
- if (!t->type) {
- c &= 127;
- if (c<=32) sprintf(buf, "%.3s", ascii+(3*c));
- else if (c==127) strcpy(buf, "del");
- else sprintf(buf, "%c", c);
- } else {
- char *bfnrtav = "\b\f\n\r\t\a\v", *s = strchr(bfnrtav, c);
- if (s) sprintf(buf, "\\%c", "bfnrtav0"[s-bfnrtav]);
- else if (c < 32 || c >= 127) sprintf(buf, "%03o", c);
- else {
- // TODO: this should be UTF8 aware.
- sprintf(buf, "%c", c);
- }
- }
- } else if (CFG_TOYBOX_FLOAT && t->type == 6) {
- long double ld;
- union {float f; double d; long double ld;} fdl;
- memcpy(&fdl, TT.buf+*offset, t->size);
- *offset += t->size;
- if (sizeof(float) == t->size) {
- ld = fdl.f;
- pad += (throw = 8)+7;
- } else if (sizeof(double) == t->size) {
- ld = fdl.d;
- pad += (throw = 17)+8;
- } else if (sizeof(long double) == t->size) {
- ld = fdl.ld;
- pad += (throw = 21)+9;
- } else error_exit("bad -tf '%d'", t->size);
- sprintf(buf, "%.*Le", throw, ld);
- // Integer types
- } else {
- unsigned long long ll = 0, or;
- char *c[] = {"%*lld", "%*llu", "%0*llo", "%0*llx"},
- *class = c[t->type-2];
- // Work out width of field
- if (t->size == 8) {
- or = -1LL;
- if (t->type == 2) or >>= 1;
- } else or = (1LL<<(8*t->size))-1;
- throw = sprintf(buf, class, 0, or);
- // Accumulate integer based on size argument
- for (k=0; k < t->size; k++) {
- or = TT.buf[(*offset)++];
- ll |= or << (8*(IS_BIG_ENDIAN ? t->size-k-1 : k));
- }
- // Handle negative values
- if (t->type == 2) {
- or = sizeof(or) - t->size;
- throw++;
- if (or && (ll & (1l<<((8*t->size)-1))))
- ll |= ((or<<(8*or))-1) << (8*t->size);
- }
- sprintf(buf, class, throw, ll);
- pad += throw+1;
- }
- return pad;
- }
- static void od_outline(void)
- {
- unsigned flags = toys.optflags;
- char buf[128], *abases[] = {"", "%07lld", "%07llo", "%06llx"};
- struct odtype *types = (struct odtype *)toybuf;
- int i, j, len, pad;
- if (TT.leftover<TT.w) memset(TT.buf+TT.leftover, 0, TT.w-TT.leftover);
- // Handle duplciate lines as *
- if (!(flags&FLAG_v) && TT.j != TT.pos && TT.leftover
- && !memcmp(TT.bufs[0], TT.bufs[1], TT.w))
- {
- if (!TT.star) {
- xputs("*");
- TT.star++;
- }
- // Print line position
- } else {
- TT.star = 0;
- // off_t varies so expand it to largest possible size
- xprintf(abases[TT.address_idx], (long long)TT.pos);
- if (!TT.leftover) {
- if (TT.address_idx) xputc('\n');
- return;
- }
- }
- TT.pos += len = TT.leftover;
- TT.leftover = 0;
- if (TT.star) return;
- // Find largest "pad" of the output types.
- for (i = pad = 0; i<TT.types; i++) {
- int bytes = 0;
- // If more than one byte of input consumed, average rounding up.
- j = od_out_t(types+i, buf, &bytes);
- j = (j+bytes-1)/bytes;
-
- if (j > pad) pad = j;
- }
- // For each output type, print one line
- for (i=0; i<TT.types; i++) {
- for (j = 0; j<len;) {
- int bytes = j;
- // pad for as many bytes as were consumed, and indent non-numbered lines
- od_out_t(types+i, buf, &bytes);
- xprintf("%*s", pad*(bytes-j) + 7*(!!i)*!j, buf);
- j = bytes;
- }
- xputc('\n');
- }
- // Toggle buffer for "same as last time" check.
- TT.buf = (TT.buf == TT.bufs[0]) ? TT.bufs[1] : TT.bufs[0];
- }
- // Loop through input files
- static void do_od(int fd, char *name)
- {
- // Skip input, possibly more than one entire file.
- if (TT.j > TT.pos) {
- off_t pos = TT.j-TT.pos, off = lskip(fd, pos);
- if (off >= 0) TT.pos += pos-off;
- if (TT.j > TT.pos) return;
- }
- for(;;) {
- char *buf = TT.buf + TT.leftover;
- int len = TT.w - TT.leftover;
- if (toys.optflags & FLAG_N) {
- if (!TT.N) break;
- if (TT.N < len) len = TT.N;
- }
- len = readall(fd, buf, len);
- if (len < 0) {
- perror_msg_raw(name);
- break;
- }
- if (TT.N) TT.N -= len;
- TT.leftover += len;
- if (TT.leftover < TT.w) break;
- od_outline();
- }
- }
- // Handle one -t argument (including implicit ones)
- static void append_base(char *base)
- {
- char *s = base;
- struct odtype *types = (struct odtype *)toybuf;
- int type;
- for (;;) {
- int size = 1;
- if (!*s) return;
- if (TT.types >= sizeof(toybuf)/sizeof(struct odtype)) break;
- if (-1 == (type = stridx("acduox"USE_TOYBOX_FLOAT("f"), *(s++)))) break;
- if (isdigit(*s)) {
- size = strtol(s, &s, 10);
- if (type < 2 && size != 1) break;
- if (CFG_TOYBOX_FLOAT && type == 6 && size == sizeof(long double));
- else if (size < 1 || size > 8) break;
- } else if (CFG_TOYBOX_FLOAT && type == 6) {
- int sizes[] = {sizeof(float), sizeof(double), sizeof(long double)};
- if (-1 == (size = stridx("FDL", *s))) size = sizeof(double);
- else {
- s++;
- size = sizes[size];
- }
- } else if (type > 1) {
- if (-1 == (size = stridx("CSIL", *s))) size = 4;
- else {
- s++;
- size = 1 << size;
- }
- }
- types[TT.types].type = type;
- types[TT.types].size = size;
- TT.types++;
- }
- error_exit("bad -t %s", base);
- }
- void od_main(void)
- {
- struct arg_list *arg;
- TT.bufs[0] = xzalloc(TT.w);
- TT.bufs[1] = xzalloc(TT.w);
- TT.buf = TT.bufs[0];
- if (!TT.A) TT.address_idx = 2;
- else if (0>(TT.address_idx = stridx("ndox", *TT.A)))
- error_exit("bad -A '%c'", *TT.A);
- // Collect -t entries
- for (arg = TT.t; arg; arg = arg->next) append_base(arg->arg);
- if (toys.optflags & FLAG_b) append_base("o1");
- if (toys.optflags & FLAG_c) append_base("c");
- 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.types) append_base("o2");
- loopfiles(toys.optargs, do_od);
- if (TT.leftover) od_outline();
- od_outline();
- if (CFG_TOYBOX_FREE) {
- free(TT.bufs[0]);
- free(TT.bufs[1]);
- }
- }
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