/****************************************************************************
- * Copyright (c) 2008 Free Software Foundation, Inc. *
+ * Copyright (c) 2008-2016,2017 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
#define USE_LIBTINFO
#include <progs.priv.h>
+#include <tty_settings.h>
-MODULE_ID("$Id: tabs.c,v 1.11 2008/11/16 00:58:24 tom Exp $")
+MODULE_ID("$Id: tabs.c,v 1.41 2017/10/12 22:42:08 tom Exp $")
static void usage(void) GCC_NORETURN;
+const char *_nc_progname;
static int max_cols;
+static void
+failed(const char *s)
+{
+ perror(s);
+ ExitProgram(EXIT_FAILURE);
+}
+
static int
putch(int c)
{
break;
}
}
- putchar('\n');
+ putchar('\r');
}
static int *
int prior = 0;
int ch;
+ if (result == 0)
+ failed("decode_tabs");
+
while ((ch = *tab_list++) != '\0') {
if (isdigit(UChar(ch))) {
value *= 10;
value += (ch - '0');
} else if (ch == ',') {
result[n] = value + prior;
- if (n > 0 && value <= result[n - 1]) {
- fprintf(stderr, "tab-stops are not in increasing order\n");
- ExitProgram(EXIT_FAILURE);
+ if (n > 0 && result[n] <= result[n - 1]) {
+ fprintf(stderr,
+ "%s: tab-stops are not in increasing order: %d %d\n",
+ _nc_progname, value, result[n - 1]);
+ free(result);
+ result = 0;
+ break;
}
++n;
value = 0;
}
}
- /*
- * If there is only one value, then it is an option such as "-8".
- */
- if ((n == 0) && (value > 0)) {
- int step = value;
- while (n < max_cols - 1) {
- result[n++] = value;
- value += step;
+ if (result != 0) {
+ /*
+ * If there is only one value, then it is an option such as "-8".
+ */
+ if ((n == 0) && (value > 0)) {
+ int step = value;
+ value = 1;
+ while (n < max_cols - 1) {
+ result[n++] = value;
+ value += step;
+ }
}
+
+ /*
+ * Add the last value, if any.
+ */
+ result[n++] = value + prior;
+ result[n] = 0;
}
- /*
- * Add the last value, if any.
- */
- result[n++] = value;
- result[n] = 0;
return result;
}
for (n = 0; n < max_cols; n += 10) {
int ch = 1 + (n / 10);
char buffer[20];
- sprintf(buffer, "----+----%c",
- ((ch < 10)
- ? (ch + '0')
- : (ch + 'A' - 10)));
+ _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer))
+ "----+----%c",
+ ((ch < 10)
+ ? (ch + '0')
+ : (ch + 'A' - 10)));
printf("%.*s", ((max_cols - n) > 10) ? 10 : (max_cols - n), buffer);
}
putchar('\n');
putchar('\n');
}
+/*
+ * Trim leading/trailing blanks, as well as blanks after a comma.
+ * Convert embedded blanks to commas.
+ */
+static char *
+trimmed_tab_list(const char *source)
+{
+ char *result = strdup(source);
+ int ch, j, k, last;
+
+ if (result != 0) {
+ for (j = k = last = 0; result[j] != 0; ++j) {
+ ch = UChar(result[j]);
+ if (isspace(ch)) {
+ if (last == '\0') {
+ continue;
+ } else if (isdigit(last) || last == ',') {
+ ch = ',';
+ }
+ } else if (ch == ',') {
+ ;
+ } else {
+ if (last == ',')
+ result[k++] = (char) last;
+ result[k++] = (char) ch;
+ }
+ last = ch;
+ }
+ result[k] = '\0';
+ }
+ return result;
+}
+
+static bool
+comma_is_needed(const char *source)
+{
+ bool result = FALSE;
+
+ if (source != 0) {
+ size_t len = strlen(source);
+ if (len != 0)
+ result = (source[len - 1] != ',');
+ } else {
+ result = FALSE;
+ }
+ return result;
+}
+
+/*
+ * Add a command-line parameter to the tab-list. It can be blank- or comma-
+ * separated (or a mixture). For simplicity, empty tabs are ignored, e.g.,
+ * tabs 1,,6,11
+ * tabs 1,6,11
+ * are treated the same.
+ */
+static const char *
+add_to_tab_list(char **append, const char *value)
+{
+ char *result = *append;
+ char *copied = trimmed_tab_list(value);
+
+ if (copied != 0 && *copied != '\0') {
+ const char *comma = ",";
+ size_t need = 1 + strlen(copied);
+
+ if (*copied == ',')
+ comma = "";
+ else if (!comma_is_needed(*append))
+ comma = "";
+
+ need += strlen(comma);
+ if (*append != 0)
+ need += strlen(*append);
+
+ result = malloc(need);
+ if (result == 0)
+ failed("add_to_tab_list");
+
+ *result = '\0';
+ if (*append != 0) {
+ _nc_STRCPY(result, *append, need);
+ free(*append);
+ }
+ _nc_STRCAT(result, comma, need);
+ _nc_STRCAT(result, copied, need);
+
+ *append = result;
+ }
+ free(copied);
+ return result;
+}
+
+/*
+ * Check for illegal characters in the tab-list.
+ */
+static bool
+legal_tab_list(const char *tab_list)
+{
+ bool result = TRUE;
+
+ if (tab_list != 0 && *tab_list != '\0') {
+ if (comma_is_needed(tab_list)) {
+ int n, ch;
+ for (n = 0; tab_list[n] != '\0'; ++n) {
+ ch = UChar(tab_list[n]);
+ if (!(isdigit(ch) || ch == ',' || ch == '+')) {
+ fprintf(stderr,
+ "%s: unexpected character found '%c'\n",
+ _nc_progname, ch);
+ result = FALSE;
+ break;
+ }
+ }
+ } else {
+ fprintf(stderr, "%s: trailing comma found '%s'\n", _nc_progname, tab_list);
+ result = FALSE;
+ }
+ } else {
+ fprintf(stderr, "%s: no tab-list given\n", _nc_progname);
+ result = FALSE;
+ }
+ return result;
+}
+
+static char *
+skip_list(char *value)
+{
+ while (*value != '\0' &&
+ (isdigit(UChar(*value)) ||
+ isspace(UChar(*value)) ||
+ strchr("+,", UChar(*value)) != 0)) {
+ ++value;
+ }
+ return value;
+}
+
static void
usage(void)
{
- static const char *msg[] =
+#define DATA(s) s "\n"
+ static const char msg[] =
{
- "Usage: tabs [options] [tabstop-list]"
- ,""
- ,"Options:"
- ," -0 reset tabs"
- ," -8 set tabs to standard interval"
- ," -a Assembler, IBM S/370, first format"
- ," -a2 Assembler, IBM S/370, second format"
- ," -c COBOL, normal format"
- ," -c2 COBOL compact format"
- ," -c3 COBOL compact format extended"
- ," -d debug (show ruler with expected/actual tab positions)"
- ," -f FORTRAN"
- ," -n no-op (do not modify terminal settings)"
- ," -p PL/I"
- ," -s SNOBOL"
- ," -u UNIVAC 1100 Assembler"
- ," -T name use terminal type 'name'"
- ,""
- ,"A tabstop-list is an ordered list of column numbers, e.g., 1,11,21"
- ,"or 1,+10,+10 which is the same."
+ DATA("Usage: tabs [options] [tabstop-list]")
+ DATA("")
+ DATA("Options:")
+ DATA(" -0 reset tabs")
+ DATA(" -8 set tabs to standard interval")
+ DATA(" -a Assembler, IBM S/370, first format")
+ DATA(" -a2 Assembler, IBM S/370, second format")
+ DATA(" -c COBOL, normal format")
+ DATA(" -c2 COBOL compact format")
+ DATA(" -c3 COBOL compact format extended")
+ DATA(" -d debug (show ruler with expected/actual tab positions)")
+ DATA(" -f FORTRAN")
+ DATA(" -n no-op (do not modify terminal settings)")
+ DATA(" -p PL/I")
+ DATA(" -s SNOBOL")
+ DATA(" -u UNIVAC 1100 Assembler")
+ DATA(" -T name use terminal type 'name'")
+ DATA(" -V print version")
+ DATA("")
+ DATA("A tabstop-list is an ordered list of column numbers, e.g., 1,11,21")
+ DATA("or 1,+10,+10 which is the same.")
};
- unsigned n;
+#undef DATA
fflush(stdout);
- for (n = 0; n < SIZEOF(msg); ++n) {
- fprintf(stderr, "%s\n", msg[n]);
- }
+ fputs(msg, stderr);
ExitProgram(EXIT_FAILURE);
}
int
main(int argc, char *argv[])
{
- int rc = EXIT_SUCCESS;
+ int rc = EXIT_FAILURE;
bool debug = FALSE;
bool no_op = FALSE;
int n, ch;
NCURSES_CONST char *term_name = 0;
- const char *mar_list = 0; /* ignored */
char *append = 0;
const char *tab_list = 0;
+ TTY tty_settings;
+ int fd;
+
+ _nc_progname = _nc_rootname(argv[0]);
+
+ fd = save_tty_settings(&tty_settings, FALSE);
if ((term_name = getenv("TERM")) == 0)
term_name = "ansi+tabs";
while ((ch = *++option) != '\0') {
switch (ch) {
case 'a':
- switch (*option) {
+ switch (*++option) {
+ default:
case '\0':
tab_list = "1,10,16,36,72";
+ option--;
/* Assembler, IBM S/370, first format */
break;
case '2':
tab_list = "1,10,16,40,72";
/* Assembler, IBM S/370, second format */
break;
- default:
- usage();
}
break;
case 'c':
- switch (*option) {
+ switch (*++option) {
+ default:
case '\0':
tab_list = "1,8,12,16,20,55";
+ option--;
/* COBOL, normal format */
break;
case '2':
tab_list = "1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67";
/* COBOL compact format extended */
break;
- default:
- usage();
}
break;
case 'd': /* ncurses extension */
if (*++option != '\0') {
term_name = option;
} else {
- term_name = argv[n++];
+ term_name = argv[n];
+ option--;
}
option += ((int) strlen(option)) - 1;
continue;
+ case 'V':
+ puts(curses_version());
+ ExitProgram(EXIT_SUCCESS);
default:
if (isdigit(UChar(*option))) {
- tab_list = option;
- ++n;
+ char *copy = strdup(option);
+ *skip_list(copy) = '\0';
+ tab_list = copy;
+ option = skip_list(option) - 1;
} else {
usage();
}
- option += ((int) strlen(option)) - 1;
break;
}
}
while ((ch = *++option) != '\0') {
switch (ch) {
case 'm':
- mar_list = option;
+ /*
+ * The "+mXXX" option is unimplemented because only the long-obsolete
+ * att510d implements smgl, which is needed to support
+ * this option.
+ */
break;
default:
- usage();
+ /* special case of relative stops separated by spaces? */
+ if (option == argv[n] + 1) {
+ tab_list = add_to_tab_list(&append, argv[n]);
+ }
+ break;
}
}
break;
default:
- if (isdigit(*option)) {
- if (append != 0) {
- if (tab_list != (const char *) append) {
- /* one of the predefined options was used */
- append = strdup(option);
- tab_list = append;
- } else {
- append = malloc(strlen(tab_list) + strlen(option) + 2);
- sprintf(append, "%s,%s", tab_list, option);
- free((char *) tab_list);
- tab_list = append;
- }
- } else {
- append = strdup(option);
- tab_list = append;
+ if (append != 0) {
+ if (tab_list != (const char *) append) {
+ /* one of the predefined options was used */
+ free(append);
+ append = 0;
}
- } else {
- usage();
}
+ tab_list = add_to_tab_list(&append, option);
break;
}
}
- setupterm(term_name, STDOUT_FILENO, (int *) 0);
+ setupterm(term_name, fd, (int *) 0);
max_cols = (columns > 0) ? columns : 80;
if (!VALID_STRING(clear_all_tabs)) {
fprintf(stderr,
"%s: terminal type '%s' cannot reset tabs\n",
- argv[0], term_name);
- rc = EXIT_FAILURE;
+ _nc_progname, term_name);
} else if (!VALID_STRING(set_tab)) {
fprintf(stderr,
"%s: terminal type '%s' cannot set tabs\n",
- argv[0], term_name);
- rc = EXIT_FAILURE;
- } else {
+ _nc_progname, term_name);
+ } else if (legal_tab_list(tab_list)) {
int *list = decode_tabs(tab_list);
if (!no_op)
if (!no_op)
do_tabs(list);
if (debug) {
+ fflush(stderr);
+ printf("tabs %s\n", tab_list);
print_ruler(list);
write_tabs(list);
}
free(list);
+ } else if (debug) {
+ fflush(stderr);
+ printf("tabs %s\n", tab_list);
}
+ rc = EXIT_SUCCESS;
}
- if (append)
+ if (append != 0)
free(append);
ExitProgram(rc);
}
projects / ncurses.git / blobdiff