*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-
+/* http://www.opengroup.org/onlinepubs/009695399/utilities/tr.html
+ * TODO: xdigit, graph, print
+ */
#include "busybox.h"
-// Even with -funsigned-char, gcc still complains about char as an array index.
-
-#define GCC4_IS_STUPID int
-
#define ASCII 0377
+#define TR_OPT_complement (1<<0)
+#define TR_OPT_delete (1<<1)
+#define TR_OPT_squeeze_reps (1<<2)
/* some "globals" shared across this file */
-static char com_fl, del_fl, sq_fl;
/* these last are pointers to static buffers declared in tr_main */
static char *poutput, *pvector, *pinvec, *poutvec;
-static void convert(void)
+static void ATTRIBUTE_NORETURN convert(const smalluint flags)
{
- int read_chars = 0, in_index = 0, out_index = 0, c, coded, last = -1;
+ size_t read_chars = 0, in_index = 0, out_index = 0, c, coded, last = -1;
for (;;) {
- // If we're out of input, flush output and read more input.
-
+ /* If we're out of input, flush output and read more input. */
if (in_index == read_chars) {
if (out_index) {
- if (write(1, (char *) poutput, out_index) != out_index)
- bb_error_msg_and_die(bb_msg_write_error);
+ xwrite(STDOUT_FILENO, (char *)poutput, out_index);
out_index = 0;
}
-
- if ((read_chars = read(0, bb_common_bufsiz1, BUFSIZ)) <= 0) {
- if (write(1, (char *) poutput, out_index) != out_index)
- bb_error_msg(bb_msg_write_error);
- exit(0);
+ if ((read_chars = read(STDIN_FILENO, bb_common_bufsiz1, BUFSIZ)) <= 0) {
+ if (write(STDOUT_FILENO, (char *)poutput, out_index) != out_index)
+ bb_perror_msg(bb_msg_write_error);
+ exit(EXIT_SUCCESS);
}
in_index = 0;
}
c = bb_common_bufsiz1[in_index++];
coded = pvector[c];
- if (del_fl && pinvec[c])
+ if ((flags & TR_OPT_delete) && pinvec[c])
continue;
- if (sq_fl && last == coded && (pinvec[c] || poutvec[coded]))
+ if ((flags & TR_OPT_squeeze_reps) && last == coded &&
+ (pinvec[c] || poutvec[coded]))
continue;
poutput[out_index++] = last = coded;
}
-
/* NOTREACHED */
}
-static void map(char *string1, unsigned int string1_len,
- char *string2, unsigned int string2_len)
+static void map(unsigned char *string1, unsigned int string1_len,
+ unsigned char *string2, unsigned int string2_len)
{
char last = '0';
unsigned int i, j;
for (j = 0, i = 0; i < string1_len; i++) {
if (string2_len <= j)
- pvector[(GCC4_IS_STUPID)string1[i]] = last;
+ pvector[string1[i]] = last;
else
- pvector[(GCC4_IS_STUPID)string1[i]] = last = string2[j++];
+ pvector[string1[i]] = last = string2[j++];
}
}
static unsigned int expand(const char *arg, char *buffer)
{
char *buffer_start = buffer;
- int i, ac;
-
+ unsigned i; /* XXX: FIXME: use unsigned char? */
+ unsigned char ac;
+#if ENABLE_FEATURE_TR_CLASSES
+#define CLO ":]"
+ const char * const classes[] = {
+ "alpha"CLO, "alnum"CLO, "digit"CLO, "lower"CLO, "upper"CLO, "space"CLO,
+ "blank"CLO, "punct"CLO, "cntrl"CLO, NULL
+ };
+#define CLASS_invalid 0 /* we increment the retval */
+#define CLASS_alpha 1
+#define CLASS_alnum 2
+#define CLASS_digit 3
+#define CLASS_lower 4
+#define CLASS_upper 5
+#define CLASS_space 6
+#define CLASS_blank 7
+#define CLASS_punct 8
+#define CLASS_cntrl 9
+//#define CLASS_xdigit 10
+//#define CLASS_graph 11
+//#define CLASS_print 12
+#endif
while (*arg) {
if (*arg == '\\') {
arg++;
*buffer++ = bb_process_escape_sequence(&arg);
} else if (*(arg+1) == '-') {
ac = *(arg+2);
- if(ac == 0) {
+ if (ac == 0) {
*buffer++ = *arg++;
continue;
}
arg++;
i = *arg++;
if (ENABLE_FEATURE_TR_CLASSES && i == ':') {
- if (strncmp(arg, "alpha", 5) == 0) {
- for (i = 'A'; i <= 'Z'; i++)
- *buffer++ = i;
- for (i = 'a'; i <= 'z'; i++)
- *buffer++ = i;
+ smalluint j;
+ { /* not really pretty.. */
+ char *tmp = xstrndup(arg, 7); // warning: xdigit needs 8, not 7
+ j = index_in_str_array(classes, tmp) + 1;
+ free(tmp);
}
- else if (strncmp(arg, "alnum", 5) == 0) {
+ if (j == CLASS_alnum || j == CLASS_digit) {
for (i = '0'; i <= '9'; i++)
*buffer++ = i;
+ }
+ if (j == CLASS_alpha || j == CLASS_alnum || j == CLASS_upper) {
for (i = 'A'; i <= 'Z'; i++)
*buffer++ = i;
- for (i = 'a'; i <= 'z'; 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)
+ if (j == CLASS_alpha || j == CLASS_alnum || j == CLASS_lower) {
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) {
- const char s[] = "\t\n\v\f\r ";
- strcat((char*)buffer, s);
- buffer += sizeof(s) - 1;
}
- else if (strncmp(arg, "blank", 5) == 0) {
+ if (j == CLASS_space || j == CLASS_blank) {
*buffer++ = '\t';
+ if (j == CLASS_space) {
+ *buffer++ = '\n';
+ *buffer++ = '\v';
+ *buffer++ = '\f';
+ *buffer++ = '\r';
+ }
*buffer++ = ' ';
}
- /* gcc gives a warning if braces aren't used here */
- else if (strncmp(arg, "punct", 5) == 0) {
+ if (j == CLASS_punct || j == CLASS_cntrl) {
for (i = 0; i <= ASCII; i++)
- if (isprint(i) && (!isalnum(i)) && (!isspace(i)))
+ if ((j == CLASS_punct &&
+ isprint(i) && (!isalnum(i)) && (!isspace(i))) ||
+ (j == CLASS_cntrl && iscntrl(i)))
*buffer++ = i;
}
- else if (strncmp(arg, "cntrl", 5) == 0) {
- for (i = 0; i <= ASCII; i++)
- if (iscntrl(i))
- *buffer++ = i;
- }
- else {
+ if (j == CLASS_invalid) {
*buffer++ = '[';
*buffer++ = ':';
continue;
}
if (ENABLE_FEATURE_TR_EQUIV && i == '=') {
*buffer++ = *arg;
- /* skip the closing =] */
- arg += 3;
+ arg += 3; /* Skip the closing =] */
continue;
}
if (*arg++ != '-') {
ac = *arg++;
while (i <= ac)
*buffer++ = i++;
- arg++; /* Skip the assumed ']' */
+ arg++; /* Skip the assumed ']' */
} else
*buffer++ = *arg++;
}
-
return (buffer - buffer_start);
}
int tr_main(int argc, char **argv)
{
unsigned char *ptr;
- int output_length=0, input_length;
+ int output_length = 0, input_length;
int idx = 1;
int i;
- RESERVE_CONFIG_BUFFER(output, BUFSIZ);
+ smalluint flags = 0;
+ RESERVE_CONFIG_UBUFFER(output, BUFSIZ);
RESERVE_CONFIG_BUFFER(vector, ASCII+1);
RESERVE_CONFIG_BUFFER(invec, ASCII+1);
RESERVE_CONFIG_BUFFER(outvec, ASCII+1);
if (argc > 1 && argv[idx][0] == '-') {
for (ptr = (unsigned char *) &argv[idx][1]; *ptr; ptr++) {
- switch (*ptr) {
- case 'c':
- com_fl = TRUE;
- break;
- case 'd':
- del_fl = TRUE;
- break;
- case 's':
- sq_fl = TRUE;
- break;
- default:
+ if (*ptr == 'c')
+ flags |= TR_OPT_complement;
+ else if (*ptr == 'd')
+ flags |= TR_OPT_delete;
+ else if (*ptr == 's')
+ flags |= TR_OPT_squeeze_reps;
+ else
bb_show_usage();
- }
}
idx++;
}
if (argv[idx] != NULL) {
input_length = expand(argv[idx++], bb_common_bufsiz1);
- if (com_fl)
+ if (flags & TR_OPT_complement)
input_length = complement(bb_common_bufsiz1, input_length);
if (argv[idx] != NULL) {
if (*argv[idx] == '\0')
map(bb_common_bufsiz1, input_length, output, output_length);
}
for (i = 0; i < input_length; i++)
- invec[(GCC4_IS_STUPID)bb_common_bufsiz1[i]] = TRUE;
+ invec[(unsigned char)bb_common_bufsiz1[i]] = TRUE;
for (i = 0; i < output_length; i++)
- outvec[(GCC4_IS_STUPID)output[i]] = TRUE;
+ outvec[output[i]] = TRUE;
}
- convert();
- return 0;
+ convert(flags);
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / commitdiff