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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
This commit is contained in:
Denis Vlasenko
parent
31773b71e8
commit
1bfcc8b08e
@ -23,11 +23,11 @@
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#define ASCII 0377
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static void map(char *pvector,
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unsigned char *string1, unsigned int string1_len,
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unsigned char *string2, unsigned int string2_len)
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unsigned char *string1, unsigned string1_len,
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unsigned char *string2, unsigned string2_len)
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{
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char last = '0';
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unsigned int i, j;
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unsigned i, j;
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for (j = 0, i = 0; i < string1_len; i++) {
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if (string2_len <= j)
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@ -39,12 +39,11 @@ static void map(char *pvector,
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/* supported constructs:
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* Ranges, e.g., 0-9 ==> 0123456789
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* Ranges, e.g., [0-9] ==> 0123456789
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* Escapes, e.g., \a ==> Control-G
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* Character classes, e.g. [:upper:] ==> A...Z
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* Equiv classess, e.g. [=A=] ==> A (hmmmmmmm?)
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*/
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static unsigned int expand(const char *arg, char *buffer)
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static unsigned expand(const char *arg, char *buffer)
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{
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char *buffer_start = buffer;
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unsigned i; /* can't be unsigned char: must be able to hold 256 */
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@ -77,7 +76,8 @@ static unsigned int expand(const char *arg, char *buffer)
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static const char classes[] ALIGN1 =
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"alpha"CLO "alnum"CLO "digit"CLO
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"lower"CLO "upper"CLO "space"CLO
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"blank"CLO "punct"CLO "cntrl"CLO;
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"blank"CLO "punct"CLO "cntrl"CLO
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"xdigit"CLO;
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#define CLASS_invalid 0 /* we increment the retval */
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#define CLASS_alpha 1
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#define CLASS_alnum 2
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@ -88,16 +88,17 @@ static unsigned int expand(const char *arg, char *buffer)
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#define CLASS_blank 7
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#define CLASS_punct 8
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#define CLASS_cntrl 9
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//#define CLASS_xdigit 10
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#define CLASS_xdigit 10
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//#define CLASS_graph 11
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//#define CLASS_print 12
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smalluint j;
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{ /* not really pretty.. */
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char *tmp = xstrndup(arg, 7); // warning: xdigit would need 8, not 7
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{
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/* xdigit needs 8, not 7 */
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char *tmp = xstrndup(arg, 7 + (arg[0]=='x'));
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j = index_in_strings(classes, tmp) + 1;
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free(tmp);
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}
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if (j == CLASS_alnum || j == CLASS_digit) {
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if (j == CLASS_alnum || j == CLASS_digit || j == CLASS_xdigit) {
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for (i = '0'; i <= '9'; i++)
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*buffer++ = i;
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}
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@ -125,6 +126,12 @@ static unsigned int expand(const char *arg, char *buffer)
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|| (j == CLASS_cntrl && iscntrl(i)))
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*buffer++ = i;
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}
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if (j == CLASS_xdigit) {
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for (i = 'A'; i <= 'F'; i++) {
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*buffer++ = i;
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*buffer++ = i | 0x20;
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}
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}
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if (j == CLASS_invalid) {
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*buffer++ = '[';
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*buffer++ = ':';
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@ -140,19 +147,14 @@ static unsigned int expand(const char *arg, char *buffer)
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arg += 3; /* skip CHAR=] */
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continue;
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}
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if (i == '\0' || *arg != '-') { /* not [x-...] - copy verbatim */
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*buffer++ = '[';
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arg--; /* points to x */
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continue; /* copy all, including eventual ']' */
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}
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/* [x-z] */
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arg++; /* skip - */
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if (arg[0] == '\0' || arg[1] != ']')
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bb_show_usage();
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ac = *arg++;
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while (i <= ac)
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*buffer++ = i++;
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arg++; /* skip ] */
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/* The rest of [xyz... cases is treated as normal
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* string, '[' has no special meaning here:
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* tr "[a-z]" "[A-Z]" can be written as tr "a-z" "A-Z",
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* also try tr "[a-z]" "_A-Z+" and you'll see that
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* [] is not special here.
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*/
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*buffer++ = '[';
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arg--; /* points to x */
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continue;
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}
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*buffer++ = *arg++;
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@ -162,29 +164,30 @@ static unsigned int expand(const char *arg, char *buffer)
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static int complement(char *buffer, int buffer_len)
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{
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int i, j, ix;
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int ch, j, len;
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char conv[ASCII + 2];
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ix = 0;
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for (i = '\0'; i <= ASCII; i++) {
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len = 0;
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for (ch = '\0'; ch <= ASCII; ch++) {
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for (j = 0; j < buffer_len; j++)
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if (buffer[j] == i)
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break;
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if (j == buffer_len)
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conv[ix++] = i & ASCII;
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if (buffer[j] == ch)
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goto next_ch;
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/* Didn't find it */
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conv[len++] = (char) ch;
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next_ch:
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continue;
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}
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memcpy(buffer, conv, ix);
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return ix;
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memcpy(buffer, conv, len);
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return len;
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}
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int tr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int tr_main(int argc UNUSED_PARAM, char **argv)
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{
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int output_length = 0, input_length;
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int i;
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smalluint flags;
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ssize_t read_chars = 0;
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size_t in_index = 0, out_index = 0;
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ssize_t read_chars;
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size_t in_index, out_index;
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unsigned last = UCHAR_MAX + 1; /* not equal to any char */
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unsigned char coded, c;
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unsigned char *output = xmalloc(BUFSIZ);
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@ -206,6 +209,9 @@ int tr_main(int argc UNUSED_PARAM, char **argv)
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#define tr_buf bb_common_bufsiz1
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if (*argv != NULL) {
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int output_length = 0;
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int input_length;
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input_length = expand(*argv++, tr_buf);
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if (flags & TR_OPT_complement)
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input_length = complement(tr_buf, input_length);
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@ -221,30 +227,33 @@ int tr_main(int argc UNUSED_PARAM, char **argv)
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outvec[output[i]] = TRUE;
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}
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goto start_from;
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for (;;) {
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/* If we're out of input, flush output and read more input. */
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if ((ssize_t)in_index == read_chars) {
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if (out_index) {
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xwrite(STDOUT_FILENO, (char *)output, out_index);
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start_from:
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out_index = 0;
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}
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read_chars = safe_read(STDIN_FILENO, tr_buf, BUFSIZ);
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if (read_chars <= 0) {
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if (read_chars < 0)
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bb_perror_msg_and_die(bb_msg_read_error);
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exit(EXIT_SUCCESS);
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break;
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}
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in_index = 0;
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}
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c = tr_buf[in_index++];
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coded = vector[c];
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if ((flags & TR_OPT_delete) && invec[c])
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continue;
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coded = vector[c];
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if ((flags & TR_OPT_squeeze_reps) && last == coded
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&& (invec[c] || outvec[coded]))
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continue;
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output[out_index++] = last = coded;
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}
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/* NOTREACHED */
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return EXIT_SUCCESS;
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}
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22
testsuite/tr.tests
Normal file
22
testsuite/tr.tests
Normal file
@ -0,0 +1,22 @@
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#!/bin/sh
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# Copyright 2009 by Denys Vlasenko <vda.linux@googlemail.com>
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# Licensed under GPL v2, see file LICENSE for details.
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. testing.sh
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# testing "description" "arguments" "result" "infile" "stdin"
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testing "tr does not treat [] in [a-z] as special" \
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"tr '[q-z]' '_Q-Z+'" \
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"_QWe+" "" "[qwe]"
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testing "tr understands 0-9A-F" \
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"tr -cd '[0-9A-F]'" \
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"19AF" "" "19AFH\n"
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testing "tr understands [:xdigit:]" \
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"tr -cd '[:xdigit:]'" \
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"19AF" "" "19AFH\n"
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exit $FAILCOUNT
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