Add -j and -N to od(1) and update README
With parseoffset(), it's rather trivial to implement POSIX' rather obscure commandments. The -j and -N-flags should be ready to go!
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README
2
README
@ -54,7 +54,7 @@ The following tools are implemented:
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=*|o nice .
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#*|o nl .
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=*|o nohup .
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od a lot
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od -t, -v
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#*|o paste .
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=*|x printenv .
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#*|o printf .
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32
od.c
32
od.c
@ -1,4 +1,5 @@
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/* See LICENSE file for copyright and license details. */
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#include <ctype.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <string.h>
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@ -6,6 +7,8 @@
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#include "util.h"
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static size_t bytes_per_line = 16;
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static off_t maxbytes = -1;
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static off_t skip = 0;
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static unsigned char radix = 'o';
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static unsigned char type = 'o';
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@ -43,25 +46,24 @@ printchar(FILE *f, unsigned char c)
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['u'] = "%3hhu ", ['x'] = "%02hhx ",
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};
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if (type != 'a' && type != 'c') {
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fprintf(f, fmtdict[type], c);
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} else {
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switch (type) {
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case 'a':
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c &= ~128; /* clear high bit as required by standard */
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if (c < LEN(namedict) || c == 127) {
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fprintf(f, "%3s ", (c == 127) ? "del" : namedict[c]);
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return;
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} else {
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fprintf(f, "%3c ", c);
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}
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break;
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case 'c':
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if (strchr("\a\b\t\n\b\f\r\0", c)) {
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fprintf(f, "%3s ", escdict[c]);
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return;
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} else {
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fprintf(f, "%3c ", c);
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}
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break;
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}
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fprintf(f, "%3c ", c);
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default:
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fprintf(f, fmtdict[type], c);
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}
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}
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@ -73,9 +75,12 @@ od(FILE *in, char *in_name, FILE *out, char *out_name)
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unsigned char buf[BUFSIZ];
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for (addr = 0; (chunklen = fread(buf, 1, BUFSIZ, in)); ) {
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for (i = 0; i < chunklen; ++i, ++addr) {
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if ((addr % bytes_per_line) == 0) {
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if (addr)
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for (i = 0; i < chunklen && (maxbytes == -1 ||
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(addr - skip) < maxbytes); ++i, ++addr) {
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if (addr - skip < 0)
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continue;
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if (((addr - skip) % bytes_per_line) == 0) {
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if (addr - skip)
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fputc('\n', out);
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printaddress(out, addr);
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}
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@ -84,6 +89,7 @@ od(FILE *in, char *in_name, FILE *out, char *out_name)
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if (feof(in) || ferror(in) || ferror(out))
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break;
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}
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if (addr)
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fputc('\n', out);
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if (radix != 'n') {
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printaddress(out, addr);
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@ -111,6 +117,12 @@ main(int argc, char *argv[])
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usage();
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radix = s[0];
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break;
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case 'j':
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skip = parseoffset(EARGF(usage()));
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break;
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case 'N':
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maxbytes = parseoffset(EARGF(usage()));
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break;
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case 't':
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s = EARGF(usage());
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if (strlen(s) != 1 || !strchr("acdoux", s[0]))
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