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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2009-03-01 04:50:18 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2009-03-01 04:50:18 +0000
commit1bfcc8b08e511be7228f93079f669d95392ef184 (patch)
tree72a5d206c0c7707927f5f58c118518330dbd3c73 /coreutils
parent31773b71e89f79cb5afda834ce15538a8818067d (diff)
downloadbusybox-1bfcc8b08e511be7228f93079f669d95392ef184.tar.gz
busybox-1bfcc8b08e511be7228f93079f669d95392ef184.tar.bz2
tr: support [:xdigit:], fix handling of ranges and [x]'s.
add testsuite entry for each of 3 bugs fixed. function old new delta static.classes 73 82 +9 expand 1738 1743 +5 complement 74 72 -2 tr_main 472 463 -9 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 2/2 up/down: 14/-11) Total: 3 bytes
Diffstat (limited to 'coreutils')
-rw-r--r--coreutils/tr.c85
1 files changed, 47 insertions, 38 deletions
diff --git a/coreutils/tr.c b/coreutils/tr.c
index c736c716b..cd31b8550 100644
--- a/coreutils/tr.c
+++ b/coreutils/tr.c
@@ -23,11 +23,11 @@
#define ASCII 0377
static void map(char *pvector,
- unsigned char *string1, unsigned int string1_len,
- unsigned char *string2, unsigned int string2_len)
+ unsigned char *string1, unsigned string1_len,
+ unsigned char *string2, unsigned string2_len)
{
char last = '0';
- unsigned int i, j;
+ unsigned i, j;
for (j = 0, i = 0; i < string1_len; i++) {
if (string2_len <= j)
@@ -39,12 +39,11 @@ static void map(char *pvector,
/* supported constructs:
* Ranges, e.g., 0-9 ==> 0123456789
- * Ranges, e.g., [0-9] ==> 0123456789
* Escapes, e.g., \a ==> Control-G
* Character classes, e.g. [:upper:] ==> A...Z
* Equiv classess, e.g. [=A=] ==> A (hmmmmmmm?)
*/
-static unsigned int expand(const char *arg, char *buffer)
+static unsigned expand(const char *arg, char *buffer)
{
char *buffer_start = buffer;
unsigned i; /* can't be unsigned char: must be able to hold 256 */
@@ -77,7 +76,8 @@ static unsigned int expand(const char *arg, char *buffer)
static const char classes[] ALIGN1 =
"alpha"CLO "alnum"CLO "digit"CLO
"lower"CLO "upper"CLO "space"CLO
- "blank"CLO "punct"CLO "cntrl"CLO;
+ "blank"CLO "punct"CLO "cntrl"CLO
+ "xdigit"CLO;
#define CLASS_invalid 0 /* we increment the retval */
#define CLASS_alpha 1
#define CLASS_alnum 2
@@ -88,16 +88,17 @@ static unsigned int expand(const char *arg, char *buffer)
#define CLASS_blank 7
#define CLASS_punct 8
#define CLASS_cntrl 9
-//#define CLASS_xdigit 10
+#define CLASS_xdigit 10
//#define CLASS_graph 11
//#define CLASS_print 12
smalluint j;
- { /* not really pretty.. */
- char *tmp = xstrndup(arg, 7); // warning: xdigit would need 8, not 7
+ {
+ /* xdigit needs 8, not 7 */
+ char *tmp = xstrndup(arg, 7 + (arg[0]=='x'));
j = index_in_strings(classes, tmp) + 1;
free(tmp);
}
- if (j == CLASS_alnum || j == CLASS_digit) {
+ if (j == CLASS_alnum || j == CLASS_digit || j == CLASS_xdigit) {
for (i = '0'; i <= '9'; i++)
*buffer++ = i;
}
@@ -125,6 +126,12 @@ static unsigned int expand(const char *arg, char *buffer)
|| (j == CLASS_cntrl && iscntrl(i)))
*buffer++ = i;
}
+ if (j == CLASS_xdigit) {
+ for (i = 'A'; i <= 'F'; i++) {
+ *buffer++ = i;
+ *buffer++ = i | 0x20;
+ }
+ }
if (j == CLASS_invalid) {
*buffer++ = '[';
*buffer++ = ':';
@@ -140,19 +147,14 @@ static unsigned int expand(const char *arg, char *buffer)
arg += 3; /* skip CHAR=] */
continue;
}
- if (i == '\0' || *arg != '-') { /* not [x-...] - copy verbatim */
- *buffer++ = '[';
- arg--; /* points to x */
- continue; /* copy all, including eventual ']' */
- }
- /* [x-z] */
- arg++; /* skip - */
- if (arg[0] == '\0' || arg[1] != ']')
- bb_show_usage();
- ac = *arg++;
- while (i <= ac)
- *buffer++ = i++;
- arg++; /* skip ] */
+ /* The rest of [xyz... cases is treated as normal
+ * string, '[' has no special meaning here:
+ * tr "[a-z]" "[A-Z]" can be written as tr "a-z" "A-Z",
+ * also try tr "[a-z]" "_A-Z+" and you'll see that
+ * [] is not special here.
+ */
+ *buffer++ = '[';
+ arg--; /* points to x */
continue;
}
*buffer++ = *arg++;
@@ -162,29 +164,30 @@ static unsigned int expand(const char *arg, char *buffer)
static int complement(char *buffer, int buffer_len)
{
- int i, j, ix;
+ int ch, j, len;
char conv[ASCII + 2];
- ix = 0;
- for (i = '\0'; i <= ASCII; i++) {
+ len = 0;
+ for (ch = '\0'; ch <= ASCII; ch++) {
for (j = 0; j < buffer_len; j++)
- if (buffer[j] == i)
- break;
- if (j == buffer_len)
- conv[ix++] = i & ASCII;
+ if (buffer[j] == ch)
+ goto next_ch;
+ /* Didn't find it */
+ conv[len++] = (char) ch;
+ next_ch:
+ continue;
}
- memcpy(buffer, conv, ix);
- return ix;
+ memcpy(buffer, conv, len);
+ return len;
}
int tr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int tr_main(int argc UNUSED_PARAM, char **argv)
{
- int output_length = 0, input_length;
int i;
smalluint flags;
- ssize_t read_chars = 0;
- size_t in_index = 0, out_index = 0;
+ ssize_t read_chars;
+ size_t in_index, out_index;
unsigned last = UCHAR_MAX + 1; /* not equal to any char */
unsigned char coded, c;
unsigned char *output = xmalloc(BUFSIZ);
@@ -206,6 +209,9 @@ int tr_main(int argc UNUSED_PARAM, char **argv)
#define tr_buf bb_common_bufsiz1
if (*argv != NULL) {
+ int output_length = 0;
+ int input_length;
+
input_length = expand(*argv++, tr_buf);
if (flags & TR_OPT_complement)
input_length = complement(tr_buf, input_length);
@@ -221,30 +227,33 @@ int tr_main(int argc UNUSED_PARAM, char **argv)
outvec[output[i]] = TRUE;
}
+ goto start_from;
+
for (;;) {
/* If we're out of input, flush output and read more input. */
if ((ssize_t)in_index == read_chars) {
if (out_index) {
xwrite(STDOUT_FILENO, (char *)output, out_index);
+ start_from:
out_index = 0;
}
read_chars = safe_read(STDIN_FILENO, tr_buf, BUFSIZ);
if (read_chars <= 0) {
if (read_chars < 0)
bb_perror_msg_and_die(bb_msg_read_error);
- exit(EXIT_SUCCESS);
+ break;
}
in_index = 0;
}
c = tr_buf[in_index++];
- coded = vector[c];
if ((flags & TR_OPT_delete) && invec[c])
continue;
+ coded = vector[c];
if ((flags & TR_OPT_squeeze_reps) && last == coded
&& (invec[c] || outvec[coded]))
continue;
output[out_index++] = last = coded;
}
- /* NOTREACHED */
+
return EXIT_SUCCESS;
}