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- pull from busybox_scratch: r15829:15850

Browse Source 
Various fixes, cleanups and shrinkage:
saves 952 Bytes:
   text    data     bss     dec     hex filename
1087742   15853  790632 1894227  1ce753 ../busybox/busybox.old
1086790   15853  790632 1893275  1ce39b busybox
via:
# scripts/bloat-o-meter ../busybox/busybox_unstripped.old busybox_unstripped 
function                                             old     new   delta
ipcrm_main                                           756     822     +66
getval                                                 -      61     +61
maybe_set_utc                                          -      40     +40
udhcpc_main                                         2896    2912     +16
md5_hash_block                                       428     437      +9
opt                                                    8      16      +8
qgravechar                                           106     110      +4
make_bitmap                                          292     295      +3
inflate_unzip                                       2056    2059      +3
add_partition                                       1412    1414      +2
__parsespent                                         156     158      +2
qrealloc                                              41      42      +1
format                                                 -       1      +1
catv_main                                            313     314      +1
watch_main                                           293     292      -1
varunset                                              81      80      -1
part                                                   1       -      -1
check_if_skip                                        837     836      -1
start_stop_daemon_main                               840     837      -3
create_lost_and_found                                175     172      -3
supress_non_delimited_lines                            4       -      -4
static.l                                               4       -      -4
static.c                                               5       1      -4
bsd_sum_file                                         237     233      -4
eval2                                                338     332      -6
arithmetic_common                                    166     158      -8
cmpfunc                                               22       5     -17
cksum_main                                           294     275     -19
cmp_main                                             465     439     -26
dd_main                                             1535    1508     -27
rmmod_main                                           376     333     -43
cut_file                                             727     644     -83
ipcs_main                                           3809    3721     -88
cut_main                                             722     614    -108
date_main                                           1443    1263    -180
remove_ids                                           222       -    -222
------------------------------------------------------------------------------
(add/remove: 3/4 grow/shrink: 11/18 up/down: 217/-853)       Total: -636 bytes
This commit is contained in:
Bernhard Reutner-Fischer
2006-08-28 23:31:54 +00:00
parent 6ce8dae1d5
commit 73561cc75a
20 changed files with 1164 additions and 1285 deletions
Download Patch File Download Diff File Expand all files Collapse all files

487
coreutils/cut.c
View File

@@ -4,28 +4,24 @@
*
* Copyright (C) 1999,2000,2001 by Lineo, inc.
* Written by Mark Whitley <markw@codepoet.org>
* debloated by Bernhard Fischer
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <limits.h>
#include "busybox.h"
/* option vars */
static const char optstring[] = "b:c:f:d:sn";
#define OPT_BYTE_FLGS 1
#define OPT_CHAR_FLGS 2
#define OPT_FIELDS_FLGS 4
#define OPT_DELIM_FLGS 8
#define OPT_SUPRESS_FLGS 16
static char part; /* (b)yte, (c)har, (f)ields */
static unsigned int supress_non_delimited_lines;
static char delim = '\t'; /* delimiter, default is tab */
static const char *const optstring = "b:c:f:d:sn";
#define CUT_OPT_BYTE_FLGS (1<<0)
#define CUT_OPT_CHAR_FLGS (1<<1)
#define CUT_OPT_FIELDS_FLGS (1<<2)
#define CUT_OPT_DELIM_FLGS (1<<3)
#define CUT_OPT_SUPPRESS_FLGS (1<<4)
static unsigned long opt;
static char delim = '\t'; /* delimiter, default is tab */
struct cut_list {
int startpos;
@@ -38,295 +34,268 @@ enum {
NON_RANGE = -1
};
static struct cut_list *cut_lists = NULL; /* growable array holding a series of lists */
static unsigned int nlists = 0; /* number of elements in above list */
/* growable array holding a series of lists */
static struct cut_list *cut_lists;
static unsigned int nlists; /* number of elements in above list */
static int cmpfunc(const void *a, const void *b)
{
struct cut_list *la = (struct cut_list *)a;
struct cut_list *lb = (struct cut_list *)b;
if (la->startpos > lb->startpos)
return 1;
if (la->startpos < lb->startpos)
return -1;
return 0;
}
/*
* parse_lists() - parses a list and puts values into startpos and endpos.
* valid list formats: N, N-, N-M, -M
* more than one list can be separated by commas
*/
static void parse_lists(char *lists)
{
char *ltok = NULL;
char *ntok = NULL;
char *junk;
int s = 0, e = 0;
/* take apart the lists, one by one (they are separated with commas */
while ((ltok = strsep(&lists, ",")) != NULL) {
/* it's actually legal to pass an empty list */
if (strlen(ltok) == 0)
continue;
/* get the start pos */
ntok = strsep(&ltok, "-");
if (ntok == NULL) {
fprintf(stderr, "Help ntok is null for starting position! What do I do?\n");
} else if (strlen(ntok) == 0) {
s = BOL;
} else {
s = strtoul(ntok, &junk, 10);
if(*junk != '\0' || s < 0)
bb_error_msg_and_die("invalid byte or field list");
/* account for the fact that arrays are zero based, while the user
* expects the first char on the line to be char # 1 */
if (s != 0)
s--;
}
/* get the end pos */
ntok = strsep(&ltok, "-");
if (ntok == NULL) {
e = NON_RANGE;
} else if (strlen(ntok) == 0) {
e = EOL;
} else {
e = strtoul(ntok, &junk, 10);
if(*junk != '\0' || e < 0)
bb_error_msg_and_die("invalid byte or field list");
/* if the user specified and end position of 0, that means "til the
* end of the line */
if (e == 0)
e = INT_MAX;
e--; /* again, arrays are zero based, lines are 1 based */
if (e == s)
e = NON_RANGE;
}
/* if there's something left to tokenize, the user past an invalid list */
if (ltok)
bb_error_msg_and_die("invalid byte or field list");
/* add the new list */
cut_lists = xrealloc(cut_lists, sizeof(struct cut_list) * (++nlists));
cut_lists[nlists-1].startpos = s;
cut_lists[nlists-1].endpos = e;
}
/* make sure we got some cut positions out of all that */
if (nlists == 0)
bb_error_msg_and_die("missing list of positions");
/* now that the lists are parsed, we need to sort them to make life easier
* on us when it comes time to print the chars / fields / lines */
qsort(cut_lists, nlists, sizeof(struct cut_list), cmpfunc);
return (((struct cut_list *) a)->startpos -
((struct cut_list *) b)->startpos);
}
static void cut_line_by_chars(const char *line)
{
int c, l;
/* set up a list so we can keep track of what's been printed */
char *printed = xzalloc(strlen(line));
/* print the chars specified in each cut list */
for (c = 0; c < nlists; c++) {
l = cut_lists[c].startpos;
while (l < strlen(line)) {
if (!printed[l]) {
putchar(line[l]);
printed[l] = 'X';
}
l++;
if (cut_lists[c].endpos == NON_RANGE || l > cut_lists[c].endpos)
break;
}
}
putchar('\n'); /* cuz we were handed a chomped line */
free(printed);
}
static void cut_line_by_fields(char *line)
{
int c, f;
int ndelim = -1; /* zero-based / one-based problem */
int nfields_printed = 0;
char *field = NULL;
char d[2] = { delim, 0 };
char *printed;
/* test the easy case first: does this line contain any delimiters? */
if (strchr(line, delim) == NULL) {
if (!supress_non_delimited_lines)
puts(line);
return;
}
/* set up a list so we can keep track of what's been printed */
printed = xzalloc(strlen(line));
/* process each list on this line, for as long as we've got a line to process */
for (c = 0; c < nlists && line; c++) {
f = cut_lists[c].startpos;
do {
/* find the field we're looking for */
while (line && ndelim < f) {
field = strsep(&line, d);
ndelim++;
}
/* we found it, and it hasn't been printed yet */
if (field && ndelim == f && !printed[ndelim]) {
/* if this isn't our first time through, we need to print the
* delimiter after the last field that was printed */
if (nfields_printed > 0)
putchar(delim);
fputs(field, stdout);
printed[ndelim] = 'X';
nfields_printed++;
}
f++;
/* keep going as long as we have a line to work with, this is a
* list, and we're not at the end of that list */
} while (line && cut_lists[c].endpos != NON_RANGE && f <= cut_lists[c].endpos);
}
/* if we printed anything at all, we need to finish it with a newline cuz
* we were handed a chomped line */
putchar('\n');
free(printed);
}
static void cut_file_by_lines(const char *line, unsigned int linenum)
{
static int c = 0;
static int l = -1;
/* I can't initialize this above cuz the "initializer isn't
* constant" *sigh* */
if (l == -1)
l = cut_lists[c].startpos;
/* get out if we have no more lists to process or if the lines are lower
* than what we're interested in */
if (c >= nlists || linenum < l)
return;
/* if the line we're looking for is lower than the one we were passed, it
* means we displayed it already, so move on */
while (l < linenum) {
l++;
/* move on to the next list if we're at the end of this one */
if (cut_lists[c].endpos == NON_RANGE || l > cut_lists[c].endpos) {
c++;
/* get out if there's no more lists to process */
if (c >= nlists)
return;
l = cut_lists[c].startpos;
/* get out if the current line is lower than the one we just became
* interested in */
if (linenum < l)
return;
}
}
/* If we made it here, it means we've found the line we're looking for, so print it */
puts(line);
}
/*
* snippy-snip
*/
static void cut_file(FILE *file)
static void cut_file(FILE * file)
{
char *line = NULL;
unsigned int linenum = 0; /* keep these zero-based to be consistent */
unsigned int linenum = 0; /* keep these zero-based to be consistent */
/* go through every line in the file */
while ((line = bb_get_chomped_line_from_file(file)) != NULL) {
/* set up a list so we can keep track of what's been printed */
char * printed = xzalloc(strlen(line) * sizeof(char));
char * orig_line = line;
unsigned int cl_pos = 0;
int spos;
/* cut based on chars/bytes XXX: only works when sizeof(char) == byte */
if ((part & (OPT_CHAR_FLGS | OPT_BYTE_FLGS)))
cut_line_by_chars(line);
if ((opt & (CUT_OPT_CHAR_FLGS | CUT_OPT_BYTE_FLGS))) {
/* print the chars specified in each cut list */
for (; cl_pos < nlists; cl_pos++) {
spos = cut_lists[cl_pos].startpos;
while (spos < strlen(line)) {
if (!printed[spos]) {
printed[spos] = 'X';
putchar(line[spos]);
}
spos++;
if (spos > cut_lists[cl_pos].endpos
|| cut_lists[cl_pos].endpos == NON_RANGE)
break;
}
}
} else if (delim == '\n') { /* cut by lines */
spos = cut_lists[cl_pos].startpos;
/* cut based on fields */
else {
if (delim == '\n')
cut_file_by_lines(line, linenum);
else
cut_line_by_fields(line);
/* get out if we have no more lists to process or if the lines
* are lower than what we're interested in */
if (linenum < spos || cl_pos >= nlists)
goto next_line;
/* if the line we're looking for is lower than the one we were
* passed, it means we displayed it already, so move on */
while (spos < linenum) {
spos++;
/* go to the next list if we're at the end of this one */
if (spos > cut_lists[cl_pos].endpos
|| cut_lists[cl_pos].endpos == NON_RANGE) {
cl_pos++;
/* get out if there's no more lists to process */
if (cl_pos >= nlists)
goto next_line;
spos = cut_lists[cl_pos].startpos;
/* get out if the current line is lower than the one
* we just became interested in */
if (linenum < spos)
goto next_line;
}
}
/* If we made it here, it means we've found the line we're
* looking for, so print it */
puts(line);
goto next_line;
} else { /* cut by fields */
int ndelim = -1; /* zero-based / one-based problem */
int nfields_printed = 0;
char *field = NULL;
const char delimiter[2] = { delim, 0 };
/* does this line contain any delimiters? */
if (strchr(line, delim) == NULL) {
if (!(opt & CUT_OPT_SUPPRESS_FLGS))
puts(line);
goto next_line;
}
/* process each list on this line, for as long as we've got
* a line to process */
for (; cl_pos < nlists && line; cl_pos++) {
spos = cut_lists[cl_pos].startpos;
do {
/* find the field we're looking for */
while (line && ndelim < spos) {
field = strsep(&line, delimiter);
ndelim++;
}
/* we found it, and it hasn't been printed yet */
if (field && ndelim == spos && !printed[ndelim]) {
/* if this isn't our first time through, we need to
* print the delimiter after the last field that was
* printed */
if (nfields_printed > 0)
putchar(delim);
fputs(field, stdout);
printed[ndelim] = 'X';
nfields_printed++; /* shouldn't overflow.. */
}
spos++;
/* keep going as long as we have a line to work with,
* this is a list, and we're not at the end of that
* list */
} while (spos <= cut_lists[cl_pos].endpos && line
&& cut_lists[cl_pos].endpos != NON_RANGE);
}
}
/* if we printed anything at all, we need to finish it with a
* newline cuz we were handed a chomped line */
putchar('\n');
next_line:
linenum++;
free(line);
free(printed);
free(orig_line);
}
}
static int getval(char *ntok)
{
char *junk;
int i = strtoul(ntok, &junk, 10);
if (*junk != '\0' || i < 0)
bb_error_msg_and_die("invalid byte or field list");
return i;
}
static const char * const _op_on_field = " only when operating on fields";
int cut_main(int argc, char **argv)
{
unsigned long opt;
char *sopt, *sdopt;
char *sopt, *ltok;
bb_opt_complementally = "b--bcf:c--bcf:f--bcf";
opt = bb_getopt_ulflags(argc, argv, optstring, &sopt, &sopt, &sopt, &sdopt);
part = opt & (OPT_BYTE_FLGS|OPT_CHAR_FLGS|OPT_FIELDS_FLGS);
if(part == 0)
bb_error_msg_and_die("you must specify a list of bytes, characters, or fields");
if(opt & BB_GETOPT_ERROR)
opt =
bb_getopt_ulflags(argc, argv, optstring, &sopt, &sopt, &sopt, &ltok);
if (!(opt & (CUT_OPT_BYTE_FLGS | CUT_OPT_CHAR_FLGS | CUT_OPT_FIELDS_FLGS)))
bb_error_msg_and_die
("expected a list of bytes, characters, or fields");
if (opt & BB_GETOPT_ERROR)
bb_error_msg_and_die("only one type of list may be specified");
parse_lists(sopt);
if((opt & (OPT_DELIM_FLGS))) {
if (strlen(sdopt) > 1) {
if ((opt & (CUT_OPT_DELIM_FLGS))) {
if (strlen(ltok) > 1) {
bb_error_msg_and_die("the delimiter must be a single character");
}
delim = sdopt[0];
delim = ltok[0];
}
supress_non_delimited_lines = opt & OPT_SUPRESS_FLGS;
/* non-field (char or byte) cutting has some special handling */
if (part != OPT_FIELDS_FLGS) {
if (supress_non_delimited_lines) {
bb_error_msg_and_die("suppressing non-delimited lines makes sense"
" only when operating on fields");
if (!(opt & CUT_OPT_FIELDS_FLGS)) {
if (opt & CUT_OPT_SUPPRESS_FLGS) {
bb_error_msg_and_die
("suppressing non-delimited lines makes sense%s",
_op_on_field);
}
if (delim != '\t') {
bb_error_msg_and_die("a delimiter may be specified only when operating on fields");
bb_error_msg_and_die
("a delimiter may be specified%s", _op_on_field);
}
}
/*
* parse list and put values into startpos and endpos.
* valid list formats: N, N-, N-M, -M
* more than one list can be separated by commas
*/
{
char *ntok;
int s = 0, e = 0;
/* take apart the lists, one by one (they are separated with commas */
while ((ltok = strsep(&sopt, ",")) != NULL) {
/* it's actually legal to pass an empty list */
if (strlen(ltok) == 0)
continue;
/* get the start pos */
ntok = strsep(&ltok, "-");
if (ntok == NULL) {
bb_error_msg
("internal error: ntok is null for start pos!?\n");
} else if (strlen(ntok) == 0) {
s = BOL;
} else {
s = getval(ntok);
/* account for the fact that arrays are zero based, while
* the user expects the first char on the line to be char #1 */
if (s != 0)
s--;
}
/* get the end pos */
ntok = strsep(&ltok, "-");
if (ntok == NULL) {
e = NON_RANGE;
} else if (strlen(ntok) == 0) {
e = EOL;
} else {
e = getval(ntok);
/* if the user specified and end position of 0, that means "til the
* end of the line */
if (e == 0)
e = EOL;
e--; /* again, arrays are zero based, lines are 1 based */
if (e == s)
e = NON_RANGE;
}
/* if there's something left to tokenize, the user passed
* an invalid list */
if (ltok)
bb_error_msg_and_die("invalid byte or field list");
/* add the new list */
cut_lists =
xrealloc(cut_lists, sizeof(struct cut_list) * (++nlists));
cut_lists[nlists - 1].startpos = s;
cut_lists[nlists - 1].endpos = e;
}
/* make sure we got some cut positions out of all that */
if (nlists == 0)
bb_error_msg_and_die("missing list of positions");
/* now that the lists are parsed, we need to sort them to make life
* easier on us when it comes time to print the chars / fields / lines
*/
qsort(cut_lists, nlists, sizeof(struct cut_list), cmpfunc);
}
/* argv[(optind)..(argc-1)] should be names of file to process. If no
* files were specified or '-' was specified, take input from stdin.
* Otherwise, we process all the files specified. */
if (argv[optind] == NULL || (strcmp(argv[optind], "-") == 0)) {
if (argv[optind] == NULL
|| (argv[optind][0] == '-' && argv[optind][1] == '\0')) {
cut_file(stdin);
}
else {
int i;
} else {
FILE *file;
for (i = optind; i < argc; i++) {
file = bb_wfopen(argv[i], "r");
if(file) {
for (; optind < argc; optind++) {
file = bb_wfopen(argv[optind], "r");
if (file) {
cut_file(file);
fclose(file);
}
}
}
if (ENABLE_FEATURE_CLEAN_UP)
free(cut_lists);
return EXIT_SUCCESS;
}