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/* vi: set sw=4 ts=4: */
/*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config NL
//config: bool "nl"
//config: default y
//config: help
//config: nl is used to number lines of files.
//applet:IF_UNIQ(APPLET(nl, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_UNIQ) += nl.o
//usage:#define nl_trivial_usage
//usage: "[OPTIONS] [FILE]..."
//usage:#define nl_full_usage "\n\n"
//usage: "Write FILEs to standard output with line numbers added\n"
//usage: "\n -b STYLE Which lines to number - a: all, t: nonempty, n: none"
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^TODO: support "pBRE": number only lines thatmatch regexp BRE"
////usage: "\n -f STYLE footer lines"
////usage: "\n -h STYLE header lines"
////usage: "\n -d CC use CC for separating logical pages"
//usage: "\n -i N Line number increment"
////usage: "\n -l NUMBER group of NUMBER empty lines counted as one"
////usage: "\n -n FORMAT lneft justified, no leading zeros; rn or rz"
////usage: "\n -p do not reset line numbers at logical pages (huh?)"
//usage: "\n -s STRING Use STRING as line number separator"
//usage: "\n -v N Start from N"
//usage: "\n -w N Width of line numbers"
/* By default, selects -v1 -i1 -l1 -sTAB -w6 -nrn -hn -bt -fn */
#include "libbb.h"
void FAST_FUNC print_numbered_lines(struct number_state *ns, const char *filename)
{
FILE *fp = fopen_or_warn_stdin(filename);
unsigned N = ns->start;
char *line;
while ((line = xmalloc_fgetline(fp)) != NULL) {
if (ns->all
|| (ns->nonempty && line[0])
) {
printf("%*u%s%s\n", ns->width, N, ns->sep, line);
N += ns->inc;
} else if (ns->empty_str)
fputs(ns->empty_str, stdout);
free(line);
}
fclose(fp);
}
int nl_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int nl_main(int argc UNUSED_PARAM, char **argv)
{
unsigned opt;
struct number_state ns;
const char *opt_b = "t";
enum {
OPT_p = (1 << 0),
};
#if ENABLE_LONG_OPTS
static const char nl_longopts[] ALIGN1 =
"body-numbering\0" Required_argument "b"
// "footer-numbering\0" Required_argument "f" - not implemented yet
// "header-numbering\0" Required_argument "h" - not implemented yet
// "section-delimiter\0" Required_argument "d" - not implemented yet
"line-increment\0" Required_argument "i"
// "join-blank-lines\0" Required_argument "l" - not implemented yet
// "number-format\0" Required_argument "n" - not implemented yet
"no-renumber\0" No_argument "p" // no-op so far
"number-separator\0" Required_argument "s"
"starting-line-number\0"Required_argument "v"
"number-width\0" Required_argument "w"
;
applet_long_options = nl_longopts;
#endif
ns.width = 6;
ns.start = 1;
ns.inc = 1;
ns.sep = "\t";
opt = getopt32(argv, "pw:+s:v:+i:+b:", &ns.width, &ns.sep, &ns.start, &ns.inc, &opt_b);
ns.all = (opt_b[0] == 'a');
ns.nonempty = (opt_b[0] == 't');
ns.empty_str = xasprintf("%*s\n", ns.width + strlen(ns.sep), "");
argv += optind;
if (!*argv)
*--argv = (char*)"-";
do {
print_numbered_lines(&ns, *argv);
} while (*++argv);
fflush_stdout_and_exit(EXIT_SUCCESS);
}
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