diff options
| -rw-r--r-- | coreutils/cut.c | 53 |
1 files changed, 30 insertions, 23 deletions
diff --git a/coreutils/cut.c b/coreutils/cut.c index 3bac151..0d95ff8 100644 --- a/coreutils/cut.c +++ b/coreutils/cut.c @@ -33,11 +33,6 @@ enum { NON_RANGE = -1 }; -/* 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) { return (((struct cut_list *) a)->startpos - @@ -45,18 +40,19 @@ static int cmpfunc(const void *a, const void *b) } -static void cut_file(FILE *file, char delim) +static void cut_file(FILE *file, char delim, const struct cut_list *cut_lists, unsigned nlists) { - char *line = NULL; - unsigned int linenum = 0; /* keep these zero-based to be consistent */ + char *line; + unsigned linenum = 0; /* keep these zero-based to be consistent */ /* go through every line in the file */ while ((line = xmalloc_fgetline(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 linelen = strlen(line); + char *printed = xzalloc(linelen * sizeof(char)); + char *orig_line = line; + unsigned cl_pos = 0; int spos; /* cut based on chars/bytes XXX: only works when sizeof(char) == byte */ @@ -64,15 +60,19 @@ static void cut_file(FILE *file, char delim) /* print the chars specified in each cut list */ for (; cl_pos < nlists; cl_pos++) { spos = cut_lists[cl_pos].startpos; - while (spos < (int)strlen(line)) { + while (spos < linelen) { if (!printed[spos]) { printed[spos] = 'X'; putchar(line[spos]); } spos++; if (spos > cut_lists[cl_pos].endpos - || cut_lists[cl_pos].endpos == NON_RANGE) + /* NON_RANGE is -1, so if below is true, + * the above was true too (spos is >= 0) */ + /* || cut_lists[cl_pos].endpos == NON_RANGE */ + ) { break; + } } } } else if (delim == '\n') { /* cut by lines */ @@ -89,7 +89,8 @@ static void cut_file(FILE *file, char delim) 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) { + || cut_lists[cl_pos].endpos == NON_RANGE + ) { cl_pos++; /* get out if there's no more lists to process */ if (cl_pos >= nlists) @@ -148,7 +149,7 @@ static void cut_file(FILE *file, char delim) * 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); + && cut_lists[cl_pos].endpos != NON_RANGE); } } /* if we printed anything at all, we need to finish it with a @@ -164,17 +165,21 @@ static void cut_file(FILE *file, char delim) int cut_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 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; + unsigned opt; opt_complementary = "b--bcf:c--bcf:f--bcf"; - getopt32(argv, optstring, &sopt, &sopt, &sopt, <ok); + opt = getopt32(argv, optstring, &sopt, &sopt, &sopt, <ok); // argc -= optind; argv += optind; - if (!(option_mask32 & (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))) bb_error_msg_and_die("expected a list of bytes, characters, or fields"); - if (option_mask32 & CUT_OPT_DELIM_FLGS) { + if (opt & CUT_OPT_DELIM_FLGS) { if (ltok[0] && ltok[1]) { /* more than 1 char? */ bb_error_msg_and_die("the delimiter must be a single character"); } @@ -182,10 +187,10 @@ int cut_main(int argc UNUSED_PARAM, char **argv) } /* non-field (char or byte) cutting has some special handling */ - if (!(option_mask32 & CUT_OPT_FIELDS_FLGS)) { + if (!(opt & CUT_OPT_FIELDS_FLGS)) { static const char _op_on_field[] ALIGN1 = " only when operating on fields"; - if (option_mask32 & CUT_OPT_SUPPRESS_FLGS) { + if (opt & CUT_OPT_SUPPRESS_FLGS) { bb_error_msg_and_die ("suppressing non-delimited lines makes sense%s", _op_on_field); @@ -231,8 +236,8 @@ int cut_main(int argc UNUSED_PARAM, char **argv) e = EOL; } else { e = xatoi_u(ltok); - /* if the user specified and end position of 0, that means "til the - * end of the line */ + /* 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 */ @@ -242,6 +247,8 @@ int cut_main(int argc UNUSED_PARAM, char **argv) /* add the new list */ cut_lists = xrealloc_vector(cut_lists, 4, nlists); + /* NB: startpos is always >= 0, + * while endpos may be = NON_RANGE (-1) */ cut_lists[nlists].startpos = s; cut_lists[nlists].endpos = e; nlists++; @@ -269,7 +276,7 @@ int cut_main(int argc UNUSED_PARAM, char **argv) retval = EXIT_FAILURE; continue; } - cut_file(file, delim); + cut_file(file, delim, cut_lists, nlists); fclose_if_not_stdin(file); } while (*++argv); |