tr: support -C as synonym to -c

diff --git a/coreutils/tr.c b/coreutils/tr.c
index bf6fa2996aeca6760b72cc476d2a29a66e6919e6..d89b80bec104cf069a86dbb10a94f4822a39fb9f 100644 (file)
--- a/coreutils/tr.c
+++ b/coreutils/tr.c
@@ -49,6 +49,14 @@ static void map(char *pvector,
  *   Escapes, e.g.,  \a    ==>  Control-G
  *   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]'
+ * qwe[d]
+ * # echo qwe123 | /usr/bin/tr 123456789 '[d*]'
+ * qweddd
  */
 static unsigned expand(const char *arg, char **buffer_p)
 {
@@ -208,7 +216,7 @@ int tr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int tr_main(int argc UNUSED_PARAM, char **argv)
 {
        int i;
-       smalluint flags;
+       smalluint opts;
        ssize_t read_chars;
        size_t in_index, out_index;
        unsigned last = UCHAR_MAX + 1; /* not equal to any char */
@@ -221,22 +229,27 @@ int tr_main(int argc UNUSED_PARAM, char **argv)
        char *invec  = vector + ASCII;
        char *outvec = vector + ASCII * 2;
 
-#define TR_OPT_complement      (1 << 0)
-#define TR_OPT_delete          (1 << 1)
-#define TR_OPT_squeeze_reps    (1 << 2)
+#define TR_OPT_complement      (3 << 0)
+#define TR_OPT_delete          (1 << 2)
+#define TR_OPT_squeeze_reps    (1 << 3)
 
        for (i = 0; i < ASCII; i++) {
                vector[i] = i;
                /*invec[i] = outvec[i] = FALSE; - done by xzalloc */
        }
 
+       /* -C/-c difference is that -C complements "characters",
+        * and -c complements "values" (binary bytes I guess).
+        * In POSIX locale, these are the same.
+        */
+
        opt_complementary = "-1";
-       flags = getopt32(argv, "+cds"); /* '+': stop at first non-option */
+       opts = getopt32(argv, "+Ccds"); /* '+': stop at first non-option */
        argv += optind;
 
        str1_length = expand(*argv++, &str1);
        str2_length = 0;
-       if (flags & TR_OPT_complement)
+       if (opts & TR_OPT_complement)
                str1_length = complement(str1, str1_length);
        if (*argv) {
                if (argv[0][0] == '\0')
@@ -271,10 +284,10 @@ int tr_main(int argc UNUSED_PARAM, char **argv)
                        in_index = 0;
                }
                c = str1[in_index++];
-               if ((flags & TR_OPT_delete) && invec[c])
+               if ((opts & TR_OPT_delete) && invec[c])
                        continue;
                coded = vector[c];
-               if ((flags & TR_OPT_squeeze_reps) && last == coded
+               if ((opts & TR_OPT_squeeze_reps) && last == coded
                 && (invec[c] || outvec[coded])
                ) {
                        continue;