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Rob Sullivan added character and equivalence classes to tr. I changed some

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comments.
This commit is contained in:
Rob Landley 2005-10-08 21:21:08 +00:00
parent 1d62d3b7b9
commit f1048143ee
1 changed files with 55 additions and 3 deletions
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58
coreutils/tr.c
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@ -28,11 +28,10 @@
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include "busybox.h"
/* This must be a #define, since when CONFIG_DEBUG and BUFFERS_GO_IN_BSS are
* enabled, we otherwise get a "storage size isn't constant error. */
#define ASCII 0377
/* some "globals" shared across this file */
@ -93,6 +92,7 @@ static void map(register unsigned char *string1, unsigned int string1_len,
/* supported constructs:
* Ranges, e.g., [0-9] ==> 0123456789
* Escapes, e.g., \a ==> Control-G
* Character classes, e.g. [:upper:] ==> A ... Z
*/
static unsigned int expand(const char *arg, register unsigned char *buffer)
{
@ -115,12 +115,64 @@ static unsigned int expand(const char *arg, register unsigned char *buffer)
arg += 3; /* Skip the assumed a-z */
} else if (*arg == '[') {
arg++;
i = *arg++;
if (ENABLE_FEATURE_TR_CLASSES && *arg++ == ':') {
if (strncmp(arg, "alpha", 5) == 0) {
for (i = 'A'; i <= 'Z'; i++)
*buffer++ = i;
for (i = 'a'; i <= 'z'; i++)
*buffer++ = i;
}
else if (strncmp(arg, "alnum", 5) == 0) {
for (i = 'A'; i <= 'Z'; i++)
*buffer++ = i;
for (i = 'a'; i <= 'z'; i++)
*buffer++ = i;
for (i = '0'; i <= '9'; i++)
*buffer++ = i;
}
else if (strncmp(arg, "digit", 5) == 0)
for (i = '0'; i <= '9'; i++)
*buffer++ = i;
else if (strncmp(arg, "lower", 5) == 0)
for (i = 'a'; i <= 'z'; i++)
*buffer++ = i;
else if (strncmp(arg, "upper", 5) == 0)
for (i = 'A'; i <= 'Z'; i++)
*buffer++ = i;
else if (strncmp(arg, "space", 5) == 0)
strcat(buffer, " \f\n\r\t\v");
else if (strncmp(arg, "blank", 5) == 0)
strcat(buffer, " \t");
/* gcc gives a warning if braces aren't used here */
else if (strncmp(arg, "punct", 5) == 0) {
for (i = 0; i <= ASCII; i++)
if (isprint(i) && (!isalnum(i)) && (!isspace(i)))
*buffer++ = i;
}
else if (strncmp(arg, "cntrl", 5) == 0) {
for (i = 0; i <= ASCII; i++)
if (iscntrl(i))
*buffer++ = i;
}
else {
strcat(buffer, "[:");
arg++;
continue;
}
break;
}
if (ENABLE_FEATURE_TR_EQUIV && *arg++ == '=') {
*buffer++ = *arg;
/* skip the closing =] */
arg += 3;
continue;
}
if (*arg++ != '-') {
*buffer++ = '[';
arg -= 2;
continue;
}
i = *arg++;
ac = *arg++;
while (i <= ac)
*buffer++ = i++;