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authorIsaac Dunham <ibid.ag@gmail.com>2014-04-12 17:26:44 -0500
committerIsaac Dunham <ibid.ag@gmail.com>2014-04-12 17:26:44 -0500
commit931425ca05b93348dd497598af077d16cdc1cd3c (patch)
tree1c5d8a9c9cf0d9953b8d74077b762e1d87b6fdf0 /toys/posix/grep.c
parent669f332aafe1afdbbfbe4b7c1c8fdab6fa2cec1d (diff)
downloadtoybox-931425ca05b93348dd497598af077d16cdc1cd3c.tar.gz
roadmap: describe glibc commands.
Some glibc commands are irrelevant because they're for functionality that is excluded from musl (mtrace, rpc*, localedef, iconvconfig, nscd). getconf and catchsegv look like candidates for the development toolchain; locale and iconv were already triaged. getent is pretty lame, but it and the timezone stuff (tzselect zic zdump) are the only new possibly interesting commands.
Diffstat (limited to 'toys/posix/grep.c')
-rw-r--r--toys/posix/grep.c98
1 files changed, 79 insertions, 19 deletions
diff --git a/toys/posix/grep.c b/toys/posix/grep.c
index aba70878..2837cc24 100644
--- a/toys/posix/grep.c
+++ b/toys/posix/grep.c
@@ -4,7 +4,7 @@
*
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/grep.html
-USE_GREP(NEWTOY(grep, "ZzEFHabhinorsvwclqe*f*m#x[!wx][!EFw]", TOYFLAG_BIN))
+USE_GREP(NEWTOY(grep, "A#B#C#ZzEFHabhinorsvwclqe*f*m#x[!wx][!EFw]", TOYFLAG_BIN))
USE_GREP(OLDTOY(egrep, grep, OPTSTR_grep, TOYFLAG_BIN))
USE_GREP(OLDTOY(fgrep, grep, OPTSTR_grep, TOYFLAG_BIN))
@@ -46,40 +46,67 @@ GLOBALS(
long m;
struct arg_list *f;
struct arg_list *e;
+ long C;
+ long B;
+ long A;
struct arg_list *regex;
+ struct double_list *blist;
)
+struct dlist_off {
+ char *next, *prev;
+ long offset;
+ char *data;
+};
+
static void do_grep(int fd, char *name)
{
FILE *file = fdopen(fd, "r");
long offset = 0;
- int lcount = 0, mcount = 0, which = toys.optflags & FLAG_w ? 2 : 0;
+ int lcount = 0, mcount = 0, which = toys.optflags & FLAG_w ? 2 : 0,
+ blines = 0, alines = 0, dash = 0;
char indelim = '\n' * !(toys.optflags&FLAG_z),
outdelim = '\n' * !(toys.optflags&FLAG_Z);
if (!fd) name = "(standard input)";
+fprintf(stderr, "boo\n");
if (!file) {
perror_msg("%s", name);
return;
}
+ // Loop through lines of input
for (;;) {
- char *line = 0, *start;
+ char *oline = 0, *line = 0, *start;
regmatch_t matches[3];
size_t unused;
long len;
int mmatch = 0;
+ // Read next line of input
lcount++;
if (0 > (len = getdelim(&line, &unused, indelim, file))) break;
if (line[len-1] == indelim) line[len-1] = 0;
+fprintf(stderr, "line=%s\n", line);
+ // Unconditionally add line to blist so output can always just dump blist.
+ dlist_add(&TT.blist, line);
+fprintf(stderr, "added=%s\n", TT.blist->data);
+fprintf(stderr, "prev=%s\n", TT.blist->prev->data);
+ if (blines <= TT.B) blines++;
+ else {
+ struct double_list *temp = dlist_pop(&TT.blist);
+fprintf(stderr, "bird=%s\n", temp->data);
+ free(temp->data);
+ free(temp);
+ }
start = line;
- for (;;)
- {
+ // Loop to match multiple times within the same line (if necessary)
+ for (;;) {
+fprintf(stderr, "match?\n");
int rc = 0, skip = 0;
if (toys.optflags & FLAG_F) {
@@ -132,30 +159,51 @@ static void do_grep(int fd, char *name)
}
matches[which].rm_so = 0;
} else if (rc) break;
-
+fprintf(stderr, "got match %s\n", line);
+ // We got a match, figure out how to display it
mmatch++;
toys.exitval = 0;
if (toys.optflags & FLAG_q) xexit();
if (toys.optflags & FLAG_l) {
printf("%s%c", name, outdelim);
- free(line);
- fclose(file);
- return;
+ goto finish;
}
+
+ line = 0;
+fprintf(stderr, "here=%s\n", TT.blist->prev->data);
+ // Yes, -o sometimes counts things as a match (-c) but doesn't display it
if (toys.optflags & FLAG_o)
if (matches[which].rm_eo == matches[which].rm_so)
break;
- if (!(toys.optflags & FLAG_c)) {
- if (toys.optflags & FLAG_H) printf("%s:", name);
- if (toys.optflags & FLAG_n) printf("%d:", lcount);
- if (toys.optflags & FLAG_b)
- printf("%ld:", offset + (start-line) +
- ((toys.optflags & FLAG_o) ? matches[which].rm_so : 0));
- if (!(toys.optflags & FLAG_o)) xprintf("%s%c", line, outdelim);
+// List of lines that DIDN'T match, print backlog?
+// Except this includes the one we just matched...?
+ while (TT.blist) {
+ struct double_list *dlist = dlist_pop(&TT.blist);
+ char *ll = dlist->data;
+fprintf(stderr, "popped %s\n", ll);
+ if (dash) printf("--%c", outdelim);
+ dash = 0;
+
+ if (!(toys.optflags & FLAG_c)) {
+ if (toys.optflags & FLAG_H) printf("%s:", name);
+ if (toys.optflags & FLAG_n) printf("%d:", lcount);
+ if (toys.optflags & FLAG_b)
+ printf("%ld:", offset + (start - dlist->data) +
+ ((toys.optflags & FLAG_o) ? matches[which].rm_so : 0));
+ if (!(toys.optflags & FLAG_o)) xprintf("%s%c", dlist->data, outdelim);
+ else if (!TT.blist) {
+
+// TODO: FLAG_o prints multiple times, can't free it yet?
+ xprintf("%.*s%c", matches[which].rm_eo - matches[which].rm_so,
+ start + matches[which].rm_so, outdelim);
+ line = dlist->data;
+ }
+ }
+ if (oline && !TT.blist) TT.blist = dlist;
else {
- xprintf("%.*s%c", matches[which].rm_eo - matches[which].rm_so,
- start + matches[which].rm_so, outdelim);
+ free(dlist->data);
+ free(dlist);
}
}
@@ -163,7 +211,7 @@ static void do_grep(int fd, char *name)
if (!(toys.optflags & FLAG_o) || !*start) break;
}
offset += len;
-
+fprintf(stderr, "Spacious skies\n");
free(line);
if (mmatch) mcount++;
@@ -175,6 +223,14 @@ static void do_grep(int fd, char *name)
xprintf("%d%c", mcount, outdelim);
}
+finish:
+ while (CFG_TOYBOX_FREE && TT.blist) {
+ struct double_list *dlist = dlist_pop(&TT.blist);
+
+ free(dlist->data);
+ free(dlist);
+ }
+
// loopfiles will also close the fd, but this frees an (opaque) struct.
fclose(file);
}
@@ -273,6 +329,10 @@ void grep_main(void)
toys.optc--;
}
+ if (!TT.A) TT.A = TT.C;
+ if (!TT.B) TT.B = TT.C;
+ if (toys.optflags & (FLAG_l|FLAG_o)) TT.B = 0; // avoid memory leak
+
parse_regex();
if (!(toys.optflags & FLAG_h) && toys.optc>1) toys.optflags |= FLAG_H;