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-rw-r--r--coreutils/cut.c207
1 files changed, 110 insertions, 97 deletions
diff --git a/coreutils/cut.c b/coreutils/cut.c
index cc3c32576..7009e74cf 100644
--- a/coreutils/cut.c
+++ b/coreutils/cut.c
@@ -14,6 +14,13 @@
//config: help
//config: cut is used to print selected parts of lines from
//config: each file to stdout.
+//config:
+//config:config FEATURE_CUT_REGEX
+//config: bool "cut -F"
+//config: default y
+//config: depends on CUT
+//config: help
+//config: Allow regex based delimiters.
//applet:IF_CUT(APPLET_NOEXEC(cut, cut, BB_DIR_USR_BIN, BB_SUID_DROP, cut))
@@ -25,9 +32,14 @@
//usage: "Print selected fields from FILEs to stdout\n"
//usage: "\n -b LIST Output only bytes from LIST"
//usage: "\n -c LIST Output only characters from LIST"
-//usage: "\n -d CHAR Use CHAR instead of tab as field delimiter"
+//usage: "\n -d SEP Field delimiter for input (default -f TAB, -F run of whitespace)"
+//usage: "\n -O SEP Field delimeter for output (default = -d for -f, one space for -F)"
+//usage: "\n -D Don't sort/collate sections or match -fF lines without delimeter"
+//usage: "\n -f LIST Print only these fields (-d is single char)"
+//usage: IF_FEATURE_CUT_REGEX(
+//usage: "\n -F LIST Print only these fields (-d is regex)"
+//usage: )
//usage: "\n -s Output only lines containing delimiter"
-//usage: "\n -f LIST Print only these fields"
//usage: "\n -n Ignored"
//(manpage:-n with -b: don't split multibyte characters)
//usage:
@@ -39,38 +51,49 @@
#include "libbb.h"
+#if ENABLE_FEATURE_CUT_REGEX
+#include "xregex.h"
+#else
+#define regex_t int
+typedef struct { int rm_eo, rm_so; } regmatch_t;
+#define xregcomp(x, ...) *(x) = 0
+#define regexec(...) 0
+#endif
+
/* This is a NOEXEC applet. Be very careful! */
/* option vars */
-#define OPT_STR "b:c:f:d:sn"
+#define OPT_STR "b:c:f:d:O:sD"IF_FEATURE_CUT_REGEX("F:")"n"
#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)
+#define CUT_OPT_ODELIM_FLGS (1 << 4)
+#define CUT_OPT_SUPPRESS_FLGS (1 << 5)
+#define CUT_OPT_NOSORT_FLGS (1 << 6)
+#define CUT_OPT_REGEX_FLGS ((1 << 7) * ENABLE_FEATURE_CUT_REGEX)
struct cut_list {
int startpos;
int endpos;
};
-enum {
- BOL = 0,
- EOL = INT_MAX,
- NON_RANGE = -1
-};
-
static int cmpfunc(const void *a, const void *b)
{
return (((struct cut_list *) a)->startpos -
((struct cut_list *) b)->startpos);
}
-static void cut_file(FILE *file, char delim, const struct cut_list *cut_lists, unsigned nlists)
+static void cut_file(FILE *file, const char *delim, const char *odelim,
+ const struct cut_list *cut_lists, unsigned nlists)
{
char *line;
unsigned linenum = 0; /* keep these zero-based to be consistent */
+ regex_t reg;
+ int spos, shoe = option_mask32 & CUT_OPT_REGEX_FLGS;
+
+ if (shoe) xregcomp(&reg, delim, REG_EXTENDED);
/* go through every line in the file */
while ((line = xmalloc_fgetline(file)) != NULL) {
@@ -80,29 +103,22 @@ static void cut_file(FILE *file, char delim, const struct cut_list *cut_lists, u
char *printed = xzalloc(linelen + 1);
char *orig_line = line;
unsigned cl_pos = 0;
- int spos;
/* cut based on chars/bytes XXX: only works when sizeof(char) == byte */
if (option_mask32 & (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 < linelen) {
+ for (spos = cut_lists[cl_pos].startpos; spos < linelen;) {
if (!printed[spos]) {
printed[spos] = 'X';
putchar(line[spos]);
}
- spos++;
- if (spos > cut_lists[cl_pos].endpos
- /* NON_RANGE is -1, so if below is true,
- * the above was true too (spos is >= 0) */
- /* || cut_lists[cl_pos].endpos == NON_RANGE */
- ) {
+ if (++spos > cut_lists[cl_pos].endpos) {
break;
}
}
}
- } else if (delim == '\n') { /* cut by lines */
+ } else if (*delim == '\n') { /* cut by lines */
spos = cut_lists[cl_pos].startpos;
/* get out if we have no more lists to process or if the lines
@@ -115,9 +131,7 @@ static void cut_file(FILE *file, char delim, const struct cut_list *cut_lists, u
while (spos < (int)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
- ) {
+ if (spos > cut_lists[cl_pos].endpos) {
cl_pos++;
/* get out if there's no more lists to process */
if (cl_pos >= nlists)
@@ -135,55 +149,56 @@ static void cut_file(FILE *file, char delim, const struct cut_list *cut_lists, u
puts(line);
goto next_line;
} else { /* cut by fields */
- int ndelim = -1; /* zero-based / one-based problem */
- int nfields_printed = 0;
- char *field = NULL;
- char delimiter[2];
-
- delimiter[0] = delim;
- delimiter[1] = 0;
-
- /* does this line contain any delimiters? */
- if (strchr(line, delim) == NULL) {
- if (!(option_mask32 & 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_stdout(field);
- printed[ndelim] = 'X';
- nfields_printed++; /* shouldn't overflow.. */
+ unsigned uu = 0, start = 0, end = 0, out = 0;
+ int dcount = 0;
+
+ /* Loop through bytes, finding next delimiter */
+ for (;;) {
+ /* End of current range? */
+ if (end == linelen || dcount > cut_lists[cl_pos].endpos) {
+ if (++cl_pos >= nlists) break;
+ if (option_mask32 & CUT_OPT_NOSORT_FLGS)
+ start = dcount = uu = 0;
+ end = 0;
+ }
+ /* End of current line? */
+ if (uu == linelen) {
+ /* If we've seen no delimiters, check -s */
+ if (!cl_pos && !dcount && !shoe) {
+ if (option_mask32 & CUT_OPT_SUPPRESS_FLGS)
+ goto next_line;
+ } else if (dcount<cut_lists[cl_pos].startpos)
+ start = linelen;
+ end = linelen;
+ } else {
+ /* Find next delimiter */
+ if (shoe) {
+ regmatch_t rr = {-1, -1};
+
+ if (!regexec(&reg, line+uu, 1, &rr, REG_NOTBOL|REG_NOTEOL)) {
+ end = uu + rr.rm_so;
+ uu += rr.rm_eo;
+ } else {
+ uu = linelen;
+ continue;
+ }
+ } else if (line[end = uu++] != *delim)
+ continue;
+
+ /* Got delimiter. Loop if not yet within range. */
+ if (dcount++ < cut_lists[cl_pos].startpos) {
+ start = uu;
+ continue;
}
-
- 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 (end != start || !shoe)
+ printf("%s%.*s", out++ ? odelim : "", end-start, line + start);
+ start = uu;
+ if (!dcount)
+ break;
}
}
- /* if we printed anything at all, we need to finish it with a
- * newline cuz we were handed a chomped line */
+ /* if we printed anything, finish with newline */
putchar('\n');
next_line:
linenum++;
@@ -198,37 +213,35 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
/* growable array holding a series of lists */
struct cut_list *cut_lists = NULL;
unsigned nlists = 0; /* number of elements in above list */
- char delim = '\t'; /* delimiter, default is tab */
char *sopt, *ltok;
+ const char *delim = NULL;
+ const char *odelim = NULL;
unsigned opt;
+#define ARG "bcf"IF_FEATURE_CUT_REGEX("F")
opt = getopt32(argv, "^"
- OPT_STR
- "\0" "b--bcf:c--bcf:f--bcf",
- &sopt, &sopt, &sopt, &ltok
+ OPT_STR // = "b:c:f:d:O:sD"IF_FEATURE_CUT_REGEX("F:")"n"
+ "\0" "b--"ARG":c--"ARG":f--"ARG IF_FEATURE_CUT_REGEX("F--"ARG),
+ &sopt, &sopt, &sopt, &delim, &odelim IF_FEATURE_CUT_REGEX(, &sopt)
);
+ if (!delim || !*delim)
+ delim = (opt & CUT_OPT_REGEX_FLGS) ? "[[:space:]]+" : "\t";
+ if (!odelim) odelim = (opt & CUT_OPT_REGEX_FLGS) ? " " : delim;
+
// argc -= optind;
argv += optind;
- if (!(opt & (CUT_OPT_BYTE_FLGS | CUT_OPT_CHAR_FLGS | CUT_OPT_FIELDS_FLGS)))
+ if (!(opt & (CUT_OPT_BYTE_FLGS | CUT_OPT_CHAR_FLGS | CUT_OPT_FIELDS_FLGS | CUT_OPT_REGEX_FLGS)))
bb_simple_error_msg_and_die("expected a list of bytes, characters, or fields");
- if (opt & CUT_OPT_DELIM_FLGS) {
- if (ltok[0] && ltok[1]) { /* more than 1 char? */
- bb_simple_error_msg_and_die("the delimiter must be a single character");
- }
- delim = ltok[0];
- }
-
/* non-field (char or byte) cutting has some special handling */
- if (!(opt & CUT_OPT_FIELDS_FLGS)) {
+ if (!(opt & (CUT_OPT_FIELDS_FLGS|CUT_OPT_REGEX_FLGS))) {
static const char _op_on_field[] ALIGN1 = " only when operating on fields";
if (opt & CUT_OPT_SUPPRESS_FLGS) {
bb_error_msg_and_die
- ("suppressing non-delimited lines makes sense%s",
- _op_on_field);
+ ("suppressing non-delimited lines makes sense%s", _op_on_field);
}
- if (delim != '\t') {
+ if (opt & CUT_OPT_DELIM_FLGS) {
bb_error_msg_and_die
("a delimiter may be specified%s", _op_on_field);
}
@@ -253,7 +266,7 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
/* get the start pos */
ntok = strsep(&ltok, "-");
if (!ntok[0]) {
- s = BOL;
+ s = 0;
} else {
s = xatoi_positive(ntok);
/* account for the fact that arrays are zero based, while
@@ -264,24 +277,23 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
/* get the end pos */
if (ltok == NULL) {
- e = NON_RANGE;
+ e = s;
} else if (!ltok[0]) {
- e = EOL;
+ e = INT_MAX;
} else {
e = xatoi_positive(ltok);
/* if the user specified and end position of 0,
* that means "til the end of the line" */
- if (e == 0)
- e = EOL;
+ if (!*ltok)
+ e = INT_MAX;
+ else if (e < s)
+ bb_error_msg_and_die("%d<%d", e, s);
e--; /* again, arrays are zero based, lines are 1 based */
- if (e == s)
- e = NON_RANGE;
}
/* add the new list */
cut_lists = xrealloc_vector(cut_lists, 4, nlists);
- /* NB: startpos is always >= 0,
- * while endpos may be = NON_RANGE (-1) */
+ /* NB: startpos is always >= 0 */
cut_lists[nlists].startpos = s;
cut_lists[nlists].endpos = e;
nlists++;
@@ -294,7 +306,8 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
/* 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(cut_lists[0]), cmpfunc);
+ if (!(opt & CUT_OPT_NOSORT_FLGS))
+ qsort(cut_lists, nlists, sizeof(cut_lists[0]), cmpfunc);
}
{
@@ -309,7 +322,7 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
retval = EXIT_FAILURE;
continue;
}
- cut_file(file, delim, cut_lists, nlists);
+ cut_file(file, delim, odelim, cut_lists, nlists);
fclose_if_not_stdin(file);
} while (*++argv);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 10:35:29 +0000