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| author | Richard Genoud <richard.genoud@gmail.com> | 2015-10-26 10:10:28 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2015-10-26 17:18:07 +0100 |
| commit | d683c5c2f1493c2b0856a5f8751508836b0988d5 (patch) | |
| tree | b9ba390323f272c76f7a316223a25c6b1760797e /coreutils/tr.c | |
| parent | 028524317d8d0011ed38e86e507a06738a5b5a97 (diff) | |
| download | busybox-d683c5c2f1493c2b0856a5f8751508836b0988d5.tar.gz | |
tr: support octal ranges
now, we can do printf "a\tb\tcdef\n" | ./busybox tr -d "\1-\14b-e"
af
and bonus, we save some bytes.
function old new delta
expand 718 699 -19
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-19) Total: -19
bytes
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'coreutils/tr.c')
| -rw-r--r-- | coreutils/tr.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/coreutils/tr.c b/coreutils/tr.c index e67948a36..2f49d5a86 100644 --- a/coreutils/tr.c +++ b/coreutils/tr.c @@ -91,7 +91,6 @@ static void map(char *pvector, * Character classes, e.g. [:upper:] ==> A...Z * Equiv classess, e.g. [=A=] ==> A (hmmmmmmm?) * not supported: - * \ooo-\ooo - octal ranges * [x*N] - repeat char x N times * [x*] - repeat char x until it fills STRING2: * # echo qwe123 | /usr/bin/tr 123456789 '[d]' @@ -99,7 +98,7 @@ static void map(char *pvector, * # echo qwe123 | /usr/bin/tr 123456789 '[d*]' * qweddd */ -static unsigned expand(const char *arg, char **buffer_p) +static unsigned expand(char *arg, char **buffer_p) { char *buffer = *buffer_p; unsigned pos = 0; @@ -113,9 +112,17 @@ static unsigned expand(const char *arg, char **buffer_p) *buffer_p = buffer = xrealloc(buffer, size); } if (*arg == '\\') { + const char *z; arg++; - buffer[pos++] = bb_process_escape_sequence(&arg); - continue; + z = arg; + ac = bb_process_escape_sequence(&z); + arg = (char *)z; + arg--; + *arg = ac; + /* + * fall through, there may be a range. + * If not, current char will be treated anyway. + */ } if (arg[1] == '-') { /* "0-9..." */ ac = arg[2]; @@ -124,9 +131,15 @@ static unsigned expand(const char *arg, char **buffer_p) continue; /* next iter will copy '-' and stop */ } i = (unsigned char) *arg; + arg += 3; /* skip 0-9 or 0-\ */ + if (ac == '\\') { + const char *z; + z = arg; + ac = bb_process_escape_sequence(&z); + arg = (char *)z; + } while (i <= ac) /* ok: i is unsigned _int_ */ buffer[pos++] = i++; - arg += 3; /* skip 0-9 */ continue; } if ((ENABLE_FEATURE_TR_CLASSES || ENABLE_FEATURE_TR_EQUIV) |