/* expand - convert tabs to spaces
- Copyright (C) 89, 91, 1995-2004 Free Software Foundation, Inc.
+ Copyright (C) 1989-2013 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* By default, convert all tabs to spaces.
Preserves backspace characters in the output; they decrement the
--tabs=tab1[,tab2[,...]]
-t tab1[,tab2[,...]]
-tab1[,tab2[,...]] If only one tab stop is given, set the tabs tab1
- columns apart instead of the default 8. Otherwise,
- set the tabs at columns tab1, tab2, etc. (numbered from
- 0); replace any tabs beyond the tab stops given with
- single spaces.
+ columns apart instead of the default 8. Otherwise,
+ set the tabs at columns tab1, tab2, etc. (numbered from
+ 0); replace any tabs beyond the tab stops given with
+ single spaces.
--initial
-i Only convert initial tabs on each line to spaces.
#include <sys/types.h>
#include "system.h"
#include "error.h"
-#include "posixver.h"
+#include "fadvise.h"
#include "quote.h"
#include "xstrndup.h"
-/* The official name of this program (e.g., no `g' prefix). */
+/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "expand"
-#define AUTHORS "David MacKenzie"
-
-/* The number of bytes added at a time to the amount of memory
- allocated for the output line. */
-#define OUTPUT_BLOCK 256
-
-/* The name this program was run with. */
-char *program_name;
+#define AUTHORS proper_name ("David MacKenzie")
/* If true, convert blanks even after nonblank characters have been
read on the line. */
static bool convert_entire_line;
-/* If nonzero, the size of all tab stops. If zero, use `tab_list' instead. */
+/* If nonzero, the size of all tab stops. If zero, use 'tab_list' instead. */
static uintmax_t tab_size;
/* Array of the explicit column numbers of the tab stops;
- after `tab_list' is exhausted, each additional tab is replaced
+ after 'tab_list' is exhausted, each additional tab is replaced
by a space. The first column is column 0. */
static uintmax_t *tab_list;
-/* The number of allocated entries in `tab_list'. */
+/* The number of allocated entries in 'tab_list'. */
static size_t n_tabs_allocated;
-/* The index of the first invalid element of `tab_list',
+/* The index of the first invalid element of 'tab_list',
where the next element can be added. */
static size_t first_free_tab;
/* Null-terminated array of input filenames. */
static char **file_list;
-/* Default for `file_list' if no files are given on the command line. */
+/* Default for 'file_list' if no files are given on the command line. */
static char *stdin_argv[] =
{
- "-", NULL
+ (char *) "-", NULL
};
/* True if we have ever read standard input. */
/* The desired exit status. */
static int exit_status;
+static char const shortopts[] = "it:0::1::2::3::4::5::6::7::8::9::";
+
static struct option const longopts[] =
{
{"tabs", required_argument, NULL, 't'},
usage (int status)
{
if (status != EXIT_SUCCESS)
- fprintf (stderr, _("Try `%s --help' for more information.\n"),
- program_name);
+ emit_try_help ();
else
{
printf (_("\
Usage: %s [OPTION]... [FILE]...\n\
"),
- program_name);
+ program_name);
fputs (_("\
Convert tabs in each FILE to spaces, writing to standard output.\n\
With no FILE, or when FILE is -, read standard input.\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
- printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
+ emit_ancillary_info ();
}
exit (status);
}
-/* Add tab stop TABVAL to the end of `tab_list'. */
+/* Add tab stop TABVAL to the end of 'tab_list'. */
static void
add_tab_stop (uintmax_t tabval)
{
if (first_free_tab == n_tabs_allocated)
- tab_list = x2nrealloc (tab_list, &n_tabs_allocated, sizeof *tab_list);
+ tab_list = X2NREALLOC (tab_list, &n_tabs_allocated);
tab_list[first_free_tab++] = tabval;
}
parse_tab_stops (char const *stops)
{
bool have_tabval = false;
- uintmax_t tabval IF_LINT (= 0);
- char const *num_start IF_LINT (= NULL);
+ uintmax_t tabval IF_LINT ( = 0);
+ char const *num_start IF_LINT ( = NULL);
bool ok = true;
for (; *stops; stops++)
{
- if (*stops == ',' || ISBLANK (to_uchar (*stops)))
- {
- if (have_tabval)
- add_tab_stop (tabval);
- have_tabval = false;
- }
+ if (*stops == ',' || isblank (to_uchar (*stops)))
+ {
+ if (have_tabval)
+ add_tab_stop (tabval);
+ have_tabval = false;
+ }
else if (ISDIGIT (*stops))
- {
- if (!have_tabval)
- {
- tabval = 0;
- have_tabval = true;
- num_start = stops;
- }
- {
- /* Detect overflow. */
- uintmax_t new_t = 10 * tabval + *stops - '0';
- if (UINTMAX_MAX / 10 < tabval || new_t < tabval * 10)
- {
- size_t len = strspn (num_start, "0123456789");
- char *bad_num = xstrndup (num_start, len);
- error (0, 0, _("tab stop is too large %s"), quote (bad_num));
- free (bad_num);
- ok = false;
- stops = num_start + len - 1;
- }
- tabval = new_t;
- }
- }
+ {
+ if (!have_tabval)
+ {
+ tabval = 0;
+ have_tabval = true;
+ num_start = stops;
+ }
+
+ /* Detect overflow. */
+ if (!DECIMAL_DIGIT_ACCUMULATE (tabval, *stops - '0', uintmax_t))
+ {
+ size_t len = strspn (num_start, "0123456789");
+ char *bad_num = xstrndup (num_start, len);
+ error (0, 0, _("tab stop is too large %s"), quote (bad_num));
+ free (bad_num);
+ ok = false;
+ stops = num_start + len - 1;
+ }
+ }
else
- {
- error (0, 0, _("tab size contains invalid character(s): %s"),
- quote (stops));
- ok = false;
- break;
- }
+ {
+ error (0, 0, _("tab size contains invalid character(s): %s"),
+ quote (stops));
+ ok = false;
+ break;
+ }
}
if (!ok)
for (i = 0; i < entries; i++)
{
if (tabs[i] == 0)
- error (EXIT_FAILURE, 0, _("tab size cannot be 0"));
+ error (EXIT_FAILURE, 0, _("tab size cannot be 0"));
if (tabs[i] <= prev_tab)
- error (EXIT_FAILURE, 0, _("tab sizes must be ascending"));
+ error (EXIT_FAILURE, 0, _("tab sizes must be ascending"));
prev_tab = tabs[i];
}
}
/* Close the old stream pointer FP if it is non-NULL,
and return a new one opened to read the next input file.
- Open a filename of `-' as the standard input.
+ Open a filename of '-' as the standard input.
Return NULL if there are no more input files. */
static FILE *
if (fp)
{
if (ferror (fp))
- {
- error (0, errno, "%s", prev_file);
- exit_status = EXIT_FAILURE;
- }
- if (fp == stdin)
- clearerr (fp); /* Also clear EOF. */
+ {
+ error (0, errno, "%s", prev_file);
+ exit_status = EXIT_FAILURE;
+ }
+ if (STREQ (prev_file, "-"))
+ clearerr (fp); /* Also clear EOF. */
else if (fclose (fp) != 0)
- {
- error (0, errno, "%s", prev_file);
- exit_status = EXIT_FAILURE;
- }
+ {
+ error (0, errno, "%s", prev_file);
+ exit_status = EXIT_FAILURE;
+ }
}
while ((file = *file_list++) != NULL)
{
- if (file[0] == '-' && file[1] == '\0')
- {
- have_read_stdin = true;
- prev_file = file;
- return stdin;
- }
- fp = fopen (file, "r");
+ if (STREQ (file, "-"))
+ {
+ have_read_stdin = true;
+ fp = stdin;
+ }
+ else
+ fp = fopen (file, "r");
if (fp)
- {
- prev_file = file;
- return fp;
- }
+ {
+ prev_file = file;
+ fadvise (fp, FADVISE_SEQUENTIAL);
+ return fp;
+ }
error (0, errno, "%s", file);
exit_status = EXIT_FAILURE;
}
}
/* Change tabs to spaces, writing to stdout.
- Read each file in `file_list', in order. */
+ Read each file in 'file_list', in order. */
static void
expand (void)
if (!fp)
return;
- /* Binary I/O will preserve the original EOL style (DOS/Unix) of files. */
- SET_BINARY2 (fileno (fp), STDOUT_FILENO);
-
- for (;;)
+ while (true)
{
/* Input character, or EOF. */
int c;
/* The following variables have valid values only when CONVERT
- is true: */
+ is true: */
/* Column of next input character. */
uintmax_t column = 0;
/* Convert a line of text. */
do
- {
- while ((c = getc (fp)) < 0 && (fp = next_file (fp)))
- SET_BINARY2 (fileno (fp), STDOUT_FILENO);
-
- if (convert)
- {
- if (c == '\t')
- {
- /* Column the next input tab stop is on. */
- uintmax_t next_tab_column;
-
- if (tab_size)
- next_tab_column = column + (tab_size - column % tab_size);
- else
- for (;;)
- if (tab_index == first_free_tab)
- {
- next_tab_column = column + 1;
- break;
- }
- else
- {
- uintmax_t tab = tab_list[tab_index++];
- if (column < tab)
- {
- next_tab_column = tab;
- break;
- }
- }
-
- if (next_tab_column < column)
- error (EXIT_FAILURE, 0, _("input line is too long"));
-
- while (++column < next_tab_column)
- if (putchar (' ') < 0)
- error (EXIT_FAILURE, errno, _("write error"));
-
- c = ' ';
- }
- else if (c == '\b')
- {
- /* Go back one column, and force recalculation of the
- next tab stop. */
- column -= !!column;
- tab_index -= !!tab_index;
- }
- else
- {
- column++;
- if (!column)
- error (EXIT_FAILURE, 0, _("input line is too long"));
- }
-
- convert &= convert_entire_line | ISBLANK (c);
- }
-
- if (c < 0)
- return;
-
- if (putchar (c) < 0)
- error (EXIT_FAILURE, errno, _("write error"));
- }
+ {
+ while ((c = getc (fp)) < 0 && (fp = next_file (fp)))
+ continue;
+
+ if (convert)
+ {
+ if (c == '\t')
+ {
+ /* Column the next input tab stop is on. */
+ uintmax_t next_tab_column;
+
+ if (tab_size)
+ next_tab_column = column + (tab_size - column % tab_size);
+ else
+ while (true)
+ if (tab_index == first_free_tab)
+ {
+ next_tab_column = column + 1;
+ break;
+ }
+ else
+ {
+ uintmax_t tab = tab_list[tab_index++];
+ if (column < tab)
+ {
+ next_tab_column = tab;
+ break;
+ }
+ }
+
+ if (next_tab_column < column)
+ error (EXIT_FAILURE, 0, _("input line is too long"));
+
+ while (++column < next_tab_column)
+ if (putchar (' ') < 0)
+ error (EXIT_FAILURE, errno, _("write error"));
+
+ c = ' ';
+ }
+ else if (c == '\b')
+ {
+ /* Go back one column, and force recalculation of the
+ next tab stop. */
+ column -= !!column;
+ tab_index -= !!tab_index;
+ }
+ else
+ {
+ column++;
+ if (!column)
+ error (EXIT_FAILURE, 0, _("input line is too long"));
+ }
+
+ convert &= convert_entire_line || !! isblank (c);
+ }
+
+ if (c < 0)
+ return;
+
+ if (putchar (c) < 0)
+ error (EXIT_FAILURE, errno, _("write error"));
+ }
while (c != '\n');
}
}
int
main (int argc, char **argv)
{
- bool have_tabval = false;
- uintmax_t tabval IF_LINT (= 0);
int c;
- bool obsolete_tablist = false;
-
initialize_main (&argc, &argv);
- program_name = argv[0];
+ set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
tab_list = NULL;
first_free_tab = 0;
- while ((c = getopt_long (argc, argv, "it:,0123456789", longopts, NULL))
- != -1)
+ while ((c = getopt_long (argc, argv, shortopts, longopts, NULL)) != -1)
{
switch (c)
- {
- case '?':
- usage (EXIT_FAILURE);
- case 'i':
- convert_entire_line = false;
- break;
- case 't':
- parse_tab_stops (optarg);
- break;
- case ',':
- if (have_tabval)
- add_tab_stop (tabval);
- have_tabval = false;
- obsolete_tablist = true;
- break;
- case_GETOPT_HELP_CHAR;
- case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
- default:
- if (!have_tabval)
- {
- tabval = 0;
- have_tabval = true;
- }
- tabval = tabval * 10 + c - '0';
- obsolete_tablist = true;
- break;
- }
+ {
+ case 'i':
+ convert_entire_line = false;
+ break;
+
+ case 't':
+ parse_tab_stops (optarg);
+ break;
+
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ if (optarg)
+ parse_tab_stops (optarg - 1);
+ else
+ {
+ char tab_stop[2];
+ tab_stop[0] = c;
+ tab_stop[1] = '\0';
+ parse_tab_stops (tab_stop);
+ }
+ break;
+
+ case_GETOPT_HELP_CHAR;
+
+ case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
+
+ default:
+ usage (EXIT_FAILURE);
+ }
}
- if (obsolete_tablist && 200112 <= posix2_version ())
- {
- error (0, 0, _("`-LIST' option is obsolete; use `-t LIST'"));
- usage (EXIT_FAILURE);
- }
-
- if (have_tabval)
- add_tab_stop (tabval);
-
validate_tab_stops (tab_list, first_free_tab);
if (first_free_tab == 0)
projects / platform / upstream / coreutils.git / blobdiff