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cut: with -F, do not regcomp() pattern for every file

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function                                             old     new   delta
cut_main                                            1218    1228     +10

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2024-12-10 02:36:59 +01:00
parent 55fc6a18da
commit 470f009552
1 changed files with 24 additions and 18 deletions
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42
coreutils/cut.c
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@ -34,6 +34,7 @@
//usage: "\n -c LIST Output only characters from LIST"
//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)"
//TODO: --output-delimiter=SEP
//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(
@ -53,11 +54,6 @@
#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! */
@ -74,6 +70,8 @@ typedef struct { int rm_eo, rm_so; } regmatch_t;
#define OPT_NOSORT (1 << 6)
#define OPT_REGEX ((1 << 7) * ENABLE_FEATURE_CUT_REGEX)
#define opt_REGEX (option_mask32 & OPT_REGEX)
struct cut_list {
int startpos;
int endpos;
@ -88,13 +86,8 @@ static int cmpfunc(const void *a, const void *b)
static void cut_file(FILE *file, const char *delim, const char *odelim,
const struct cut_list *cut_list, unsigned nlists)
{
#define opt_REGEX (option_mask32 & OPT_REGEX)
char *line;
unsigned linenum = 0; /* keep these zero-based to be consistent */
regex_t reg;
if (opt_REGEX)
xregcomp(&reg, delim, REG_EXTENDED);
/* go through every line in the file */
while ((line = xmalloc_fgetline(file)) != NULL) {
@ -121,7 +114,7 @@ static void cut_file(FILE *file, const char *delim, const char *odelim,
}
}
free(printed);
} else if (*delim == '\n') { /* cut by lines */
} else if (!opt_REGEX && *delim == '\n') { /* cut by lines */
int spos = cut_list[cl_pos].startpos;
/* get out if we have no more lists to process or if the lines
@ -181,20 +174,24 @@ static void cut_file(FILE *file, const char *delim, const char *odelim,
/* else: will print entire line */
} else if (dcount < cut_list[cl_pos].startpos)
start = linelen; /* do not print */
end = linelen;
end = linelen; /* print up to end */
} else {
/* Find next delimiter */
#if ENABLE_FEATURE_CUT_REGEX
if (opt_REGEX) {
regmatch_t rr = {-1, -1};
regex_t *reg = (void*) delim;
if (!regexec(&reg, line + next, 1, &rr, REG_NOTBOL|REG_NOTEOL)) {
end = next + rr.rm_so;
next += rr.rm_eo;
} else {
if (regexec(reg, line + next, 1, &rr, REG_NOTBOL|REG_NOTEOL) != 0) {
/* not found, go to "end of line" logic */
next = linelen;
continue;
}
} else {
end = next + rr.rm_so;
next += rr.rm_eo;
} else
#endif
{
end = next++;
if (line[end] != *delim)
continue;
@ -224,7 +221,6 @@ static void cut_file(FILE *file, const char *delim, const char *odelim,
linenum++;
free(line);
} /* while (got line) */
#undef opt_REGEX
}
int cut_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
@ -237,6 +233,9 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
const char *delim = NULL;
const char *odelim = NULL;
unsigned opt;
#if ENABLE_FEATURE_CUT_REGEX
regex_t reg;
#endif
#define ARG "bcf"IF_FEATURE_CUT_REGEX("F")
opt = getopt32(argv, "^"
@ -328,6 +327,13 @@ int cut_main(int argc UNUSED_PARAM, char **argv)
qsort(cut_list, nlists, sizeof(cut_list[0]), cmpfunc);
}
#if ENABLE_FEATURE_CUT_REGEX
if (opt & OPT_REGEX) {
xregcomp(&reg, delim, REG_EXTENDED);
delim = (void*) &reg;
}
#endif
{
exitcode_t retval = EXIT_SUCCESS;