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Rob Sullivan added character and equivalence classes to tr. I changed some
comments.
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@ -28,11 +28,10 @@
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include "busybox.h"
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/* This must be a #define, since when CONFIG_DEBUG and BUFFERS_GO_IN_BSS are
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* enabled, we otherwise get a "storage size isn't constant error. */
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#define ASCII 0377
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/* some "globals" shared across this file */
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@ -93,6 +92,7 @@ static void map(register unsigned char *string1, unsigned int string1_len,
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/* supported constructs:
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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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*/
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static unsigned int expand(const char *arg, register unsigned char *buffer)
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{
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@ -115,12 +115,64 @@ static unsigned int expand(const char *arg, register unsigned char *buffer)
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arg += 3; /* Skip the assumed a-z */
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} else if (*arg == '[') {
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arg++;
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i = *arg++;
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if (ENABLE_FEATURE_TR_CLASSES && *arg++ == ':') {
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if (strncmp(arg, "alpha", 5) == 0) {
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for (i = 'A'; i <= 'Z'; i++)
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*buffer++ = i;
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for (i = 'a'; i <= 'z'; i++)
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*buffer++ = i;
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}
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else if (strncmp(arg, "alnum", 5) == 0) {
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for (i = 'A'; i <= 'Z'; i++)
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*buffer++ = i;
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for (i = 'a'; i <= 'z'; i++)
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*buffer++ = i;
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for (i = '0'; i <= '9'; i++)
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*buffer++ = i;
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}
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else if (strncmp(arg, "digit", 5) == 0)
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for (i = '0'; i <= '9'; i++)
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*buffer++ = i;
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else if (strncmp(arg, "lower", 5) == 0)
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for (i = 'a'; i <= 'z'; i++)
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*buffer++ = i;
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else if (strncmp(arg, "upper", 5) == 0)
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for (i = 'A'; i <= 'Z'; i++)
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*buffer++ = i;
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else if (strncmp(arg, "space", 5) == 0)
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strcat(buffer, " \f\n\r\t\v");
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else if (strncmp(arg, "blank", 5) == 0)
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strcat(buffer, " \t");
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/* gcc gives a warning if braces aren't used here */
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else if (strncmp(arg, "punct", 5) == 0) {
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for (i = 0; i <= ASCII; i++)
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if (isprint(i) && (!isalnum(i)) && (!isspace(i)))
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*buffer++ = i;
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}
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else if (strncmp(arg, "cntrl", 5) == 0) {
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for (i = 0; i <= ASCII; i++)
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if (iscntrl(i))
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*buffer++ = i;
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}
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else {
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strcat(buffer, "[:");
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arg++;
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continue;
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}
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break;
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}
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if (ENABLE_FEATURE_TR_EQUIV && *arg++ == '=') {
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*buffer++ = *arg;
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/* skip the closing =] */
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arg += 3;
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continue;
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}
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if (*arg++ != '-') {
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*buffer++ = '[';
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arg -= 2;
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continue;
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}
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i = *arg++;
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ac = *arg++;
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while (i <= ac)
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*buffer++ = i++;
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