From d88f94a5df3a2edb8ba56fab5c13674b452f87ab Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Wed, 5 Apr 2017 18:17:17 +0200 Subject: nl: new applet; also implement cat -nb (similar functionality to nl) function old new delta nl_main - 201 +201 print_numbered_lines - 115 +115 cat_main 36 149 +113 static.nl_longopts - 106 +106 packed_usage 31081 31182 +101 applet_main 1488 1492 +4 applet_names 2575 2578 +3 applet_suid 93 94 +1 applet_install_loc 186 187 +1 ------------------------------------------------------------------------------ (add/remove: 4/0 grow/shrink: 6/0 up/down: 645/0) Total: 645 bytes Signed-off-by: Denys Vlasenko --- coreutils/nl.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 coreutils/nl.c (limited to 'coreutils/nl.c') diff --git a/coreutils/nl.c b/coreutils/nl.c new file mode 100644 index 000000000..97931f334 --- /dev/null +++ b/coreutils/nl.c @@ -0,0 +1,100 @@ +/* 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); +} -- cgit v1.2.3