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13 * in all copies or substantial portions of the Software. *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Thomas E. Dickey 2008 *
31 ****************************************************************************/
34 * tabs.c -- set terminal hard-tabstops
38 #include <progs.priv.h>
40 MODULE_ID("$Id: tabs.c,v 1.37 2015/07/04 21:14:42 tom Exp $")
42 static void usage(void) GCC_NORETURN;
44 static char *prg_name;
51 ExitProgram(EXIT_FAILURE);
61 do_tabs(int *tab_list)
67 while ((stop = *tab_list++) > 0) {
69 while (last++ < stop) {
75 if (stop <= max_cols) {
76 tputs(tparm(set_tab, stop), 1, putch);
86 decode_tabs(const char *tab_list)
88 int *result = typeCalloc(int, strlen(tab_list) + (unsigned) max_cols);
95 failed("decode_tabs");
97 while ((ch = *tab_list++) != '\0') {
98 if (isdigit(UChar(ch))) {
101 } else if (ch == ',') {
102 result[n] = value + prior;
103 if (n > 0 && result[n] <= result[n - 1]) {
105 "%s: tab-stops are not in increasing order: %d %d\n",
106 prg_name, value, result[n - 1]);
114 } else if (ch == '+') {
116 prior = result[n - 1];
122 * If there is only one value, then it is an option such as "-8".
124 if ((n == 0) && (value > 0)) {
127 while (n < max_cols - 1) {
134 * Add the last value, if any.
136 result[n++] = value + prior;
144 print_ruler(int *tab_list)
150 /* first print a readable ruler */
151 for (n = 0; n < max_cols; n += 10) {
152 int ch = 1 + (n / 10);
154 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
159 printf("%.*s", ((max_cols - n) > 10) ? 10 : (max_cols - n), buffer);
163 /* now, print '*' for each stop */
164 for (n = 0, last = 0; (tab_list[n] > 0) && (last < max_cols); ++n) {
166 while (++last < stop) {
167 if (last <= max_cols) {
173 if (last <= max_cols) {
180 while (++last <= max_cols)
186 * Write an '*' on each tabstop, to demonstrate whether it lines up with the
190 write_tabs(int *tab_list)
194 while ((stop = *tab_list++) > 0 && stop <= max_cols) {
195 fputs((stop == 1) ? "*" : "\t*", stdout);
197 /* also show a tab _past_ the stops */
199 fputs("\t+", stdout);
204 * Trim leading/trailing blanks, as well as blanks after a comma.
205 * Convert embedded blanks to commas.
208 trimmed_tab_list(const char *source)
210 char *result = strdup(source);
214 for (j = k = last = 0; result[j] != 0; ++j) {
215 ch = UChar(result[j]);
219 } else if (isdigit(last) || last == ',') {
222 } else if (ch == ',') {
226 result[k++] = (char) last;
227 result[k++] = (char) ch;
237 comma_is_needed(const char *source)
242 size_t len = strlen(source);
244 result = (source[len - 1] != ',');
252 * Add a command-line parameter to the tab-list. It can be blank- or comma-
253 * separated (or a mixture). For simplicity, empty tabs are ignored, e.g.,
256 * are treated the same.
259 add_to_tab_list(char **append, const char *value)
261 char *result = *append;
262 char *copied = trimmed_tab_list(value);
264 if (copied != 0 && *copied != '\0') {
265 const char *comma = ",";
266 size_t need = 1 + strlen(copied);
270 else if (!comma_is_needed(*append))
273 need += strlen(comma);
275 need += strlen(*append);
277 result = malloc(need);
279 failed("add_to_tab_list");
283 _nc_STRCPY(result, *append, need);
286 _nc_STRCAT(result, comma, need);
287 _nc_STRCAT(result, copied, need);
296 * Check for illegal characters in the tab-list.
299 legal_tab_list(const char *tab_list)
303 if (tab_list != 0 && *tab_list != '\0') {
304 if (comma_is_needed(tab_list)) {
306 for (n = 0; tab_list[n] != '\0'; ++n) {
307 ch = UChar(tab_list[n]);
308 if (!(isdigit(ch) || ch == ',' || ch == '+')) {
310 "%s: unexpected character found '%c'\n",
317 fprintf(stderr, "%s: trailing comma found '%s'\n", prg_name, tab_list);
321 fprintf(stderr, "%s: no tab-list given\n", prg_name);
328 skip_list(char *value)
330 while (*value != '\0' &&
331 (isdigit(UChar(*value)) ||
332 isspace(UChar(*value)) ||
333 strchr("+,", UChar(*value)) != 0)) {
342 #define DATA(s) s "\n"
343 static const char msg[] =
345 DATA("Usage: tabs [options] [tabstop-list]")
348 DATA(" -0 reset tabs")
349 DATA(" -8 set tabs to standard interval")
350 DATA(" -a Assembler, IBM S/370, first format")
351 DATA(" -a2 Assembler, IBM S/370, second format")
352 DATA(" -c COBOL, normal format")
353 DATA(" -c2 COBOL compact format")
354 DATA(" -c3 COBOL compact format extended")
355 DATA(" -d debug (show ruler with expected/actual tab positions)")
357 DATA(" -n no-op (do not modify terminal settings)")
360 DATA(" -u UNIVAC 1100 Assembler")
361 DATA(" -T name use terminal type 'name'")
362 DATA(" -V print version")
364 DATA("A tabstop-list is an ordered list of column numbers, e.g., 1,11,21")
365 DATA("or 1,+10,+10 which is the same.")
371 ExitProgram(EXIT_FAILURE);
375 main(int argc, char *argv[])
377 int rc = EXIT_FAILURE;
381 NCURSES_CONST char *term_name = 0;
383 const char *tab_list = 0;
385 prg_name = _nc_rootname(argv[0]);
387 if ((term_name = getenv("TERM")) == 0)
388 term_name = "ansi+tabs";
390 /* cannot use getopt, since some options are two-character */
391 for (n = 1; n < argc; ++n) {
392 char *option = argv[n];
395 while ((ch = *++option) != '\0') {
401 tab_list = "1,10,16,36,72";
403 /* Assembler, IBM S/370, first format */
406 tab_list = "1,10,16,40,72";
407 /* Assembler, IBM S/370, second format */
415 tab_list = "1,8,12,16,20,55";
417 /* COBOL, normal format */
420 tab_list = "1,6,10,14,49";
421 /* COBOL compact format */
424 tab_list = "1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67";
425 /* COBOL compact format extended */
429 case 'd': /* ncurses extension */
433 tab_list = "1,7,11,15,19,23";
436 case 'n': /* ncurses extension */
440 tab_list = "1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61";
444 tab_list = "1,10,55";
448 tab_list = "1,12,20,44";
449 /* UNIVAC 1100 Assembler */
453 if (*++option != '\0') {
456 term_name = argv[n++];
459 option += ((int) strlen(option)) - 1;
462 puts(curses_version());
463 ExitProgram(EXIT_SUCCESS);
465 if (isdigit(UChar(*option))) {
466 char *copy = strdup(option);
467 *skip_list(copy) = '\0';
469 option = skip_list(option) - 1;
478 while ((ch = *++option) != '\0') {
482 * The "+mXXX" option is unimplemented because only the long-obsolete
483 * att510d implements smgl, which is needed to support
488 /* special case of relative stops separated by spaces? */
489 if (option == argv[n] + 1) {
490 tab_list = add_to_tab_list(&append, argv[n]);
498 if (tab_list != (const char *) append) {
499 /* one of the predefined options was used */
504 tab_list = add_to_tab_list(&append, option);
509 setupterm(term_name, STDOUT_FILENO, (int *) 0);
511 max_cols = (columns > 0) ? columns : 80;
513 if (!VALID_STRING(clear_all_tabs)) {
515 "%s: terminal type '%s' cannot reset tabs\n",
516 prg_name, term_name);
517 } else if (!VALID_STRING(set_tab)) {
519 "%s: terminal type '%s' cannot set tabs\n",
520 prg_name, term_name);
521 } else if (legal_tab_list(tab_list)) {
522 int *list = decode_tabs(tab_list);
525 tputs(clear_all_tabs, 1, putch);
532 printf("tabs %s\n", tab_list);
539 printf("tabs %s\n", tab_list);