diff options
Diffstat (limited to 'util-linux')
| -rw-r--r-- | util-linux/hexdump_xxd.c | 56 |
1 files changed, 39 insertions, 17 deletions
diff --git a/util-linux/hexdump_xxd.c b/util-linux/hexdump_xxd.c index 4372ac7..dbda34b 100644 --- a/util-linux/hexdump_xxd.c +++ b/util-linux/hexdump_xxd.c @@ -76,12 +76,14 @@ static void reverse(unsigned opt, const char *filename) fp = filename ? xfopen_for_read(filename) : stdin; + get_new_line: while ((buf = xmalloc_fgetline(fp)) != NULL) { char *p; p = buf; if (!(opt & OPT_p)) { - /* skip address */ + skip_address: + p = skip_whitespace(p); while (isxdigit(*p)) p++; /* NB: for xxd -r, first hex portion is address even without colon */ /* If it's there, skip it: */ @@ -94,36 +96,45 @@ static void reverse(unsigned opt, const char *filename) /* Process hex bytes optionally separated by whitespace */ for (;;) { uint8_t val, c; + int badchar = 0; nibble1: - p = skip_whitespace(p); - + if (opt & OPT_p) + p = skip_whitespace(p); c = *p++; if (isdigit(c)) val = c - '0'; else if ((c|0x20) >= 'a' && (c|0x20) <= 'f') val = (c|0x20) - ('a' - 10); else { - /* xxd V1.10 is inconsistent here. + /* xxd V1.10 allows one non-hexnum char: * echo -e "31 !3 0a 0a" | xxd -r -p * is "10<a0>" (no <cr>) - "!" is ignored, - * but + * but stops for more than one: * echo -e "31 !!343434\n30 0a" | xxd -r -p * is "10<cr>" - "!!" drops rest of the line. - * We will ignore all invalid chars: + * Note: this also covers whitespace chars: + * xxxxxxxx: 3031 3233 3435 3637 3839 3a3b 3c3d 3e3f 0123456789:;<=>? + * detects this ^ - skips this one space + * xxxxxxxx: 3031 3233 3435 3637 3839 3a3b 3c3d 3e3f 0123456789:;<=>? + * detects this ^^ - skips the rest */ - if (c != '\0') - goto nibble1; - break; + if (c == '\0' || badchar) + break; + badchar++; + goto nibble1; } val <<= 4; - /* Works the same with xxd V1.10: - * echo "31 09 32 0a" | xxd -r -p - * echo "31 0 9 32 0a" | xxd -r -p - * thus allow whitespace even within the byte: - */ nibble2: - p = skip_whitespace(p); + if (opt & OPT_p) { + /* Works the same with xxd V1.10: + * echo "31 09 32 0a" | xxd -r -p + * echo "31 0 9 32 0a" | xxd -r -p + * thus allow whitespace (even multiple chars) + * after byte's 1st char: + */ + p = skip_whitespace(p); + } c = *p++; if (isdigit(c)) @@ -132,7 +143,16 @@ static void reverse(unsigned opt, const char *filename) val |= (c|0x20) - ('a' - 10); else { if (c != '\0') { - /* "...3<not_hex_char>..." ignores both chars */ + /* "...3<not_hex_char>...": ignore "3", + * skip everything up to next hexchar or newline: + */ + while (!isxdigit(*p)) { + if (*p == '\0') { + free(buf); + goto get_new_line; + } + p++; + } goto nibble1; } /* Nibbles can join even through newline: @@ -143,10 +163,12 @@ static void reverse(unsigned opt, const char *filename) p = buf = xmalloc_fgetline(fp); if (!buf) break; + if (!(opt & OPT_p)) /* -p and !-p: different behavior */ + goto skip_address; goto nibble2; } putchar(val); - } + } /* for(;;) */ free(buf); } //fclose(fp); |