config/git: import suckless sbase

i currently use the output of sha512sum in several
places of xbmk, which is a bit unreliable in case
output changes.

other cases where i use util outputs in variables
are probably reliable, because i'm using mostly
posix utilities in those.

to mitigate this, i now import suckless sbase, which
has a reasonable sha512sum implementation.

*every* binary it builds is being placed in build.list,
because i'll probably start using more of them.

for example, i may start modifying the "date"
implementation, adding the GNU-specific options that
i need as mentioned on init.sh

i'm importing it in util/ because the sha512sum
util is needed for verifying project sources, so
if sbase itself is a "project source", that means
we can into a chicken and egg bootstrapping problem.

this is sbase at revision:
055cc1ae1b3a13c3d8f25af0a4a3316590efcd48

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/util/sbase/paste.c b/util/sbase/paste.c
new file mode 100644
index 00000000..4fa9fc5a
--- /dev/null
+++ b/util/sbase/paste.c
@@ -0,0 +1,144 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdlib.h>
+#include <string.h>
+
+#include "utf.h"
+#include "util.h"
+
+struct fdescr {
+	FILE *fp;
+	const char *name;
+};
+
+static void
+sequential(struct fdescr *dsc, int fdescrlen, Rune *delim, size_t delimlen)
+{
+	Rune c, last;
+	size_t i, d;
+
+	for (i = 0; i < fdescrlen; i++) {
+		d = 0;
+		last = 0;
+
+		while (efgetrune(&c, dsc[i].fp, dsc[i].name)) {
+			if (last == '\n') {
+				if (delim[d] != '\0')
+					efputrune(&delim[d], stdout, "<stdout>");
+				d = (d + 1) % delimlen;
+			}
+
+			if (c != '\n')
+				efputrune(&c, stdout, "<stdout>");
+			last = c;
+		}
+
+		if (last == '\n')
+			efputrune(&last, stdout, "<stdout>");
+	}
+}
+
+static void
+parallel(struct fdescr *dsc, int fdescrlen, Rune *delim, size_t delimlen)
+{
+	Rune c, d;
+	size_t i, m;
+	ssize_t last;
+
+nextline:
+	last = -1;
+
+	for (i = 0; i < fdescrlen; i++) {
+		d = delim[i % delimlen];
+		c = 0;
+
+		while (efgetrune(&c, dsc[i].fp, dsc[i].name)) {
+			for (m = last + 1; m < i; m++) {
+				if (delim[m % delimlen] != '\0')
+					efputrune(&delim[m % delimlen], stdout, "<stdout>");
+			}
+			last = i;
+			if (c == '\n') {
+				if (i != fdescrlen - 1)
+					c = d;
+				efputrune(&c, stdout, "<stdout>");
+				break;
+			}
+			efputrune(&c, stdout, "<stdout>");
+		}
+
+		if (c == 0 && last != -1) {
+			if (i == fdescrlen - 1)
+				putchar('\n');
+			else if (d != '\0')
+				efputrune(&d, stdout, "<stdout>");
+			last++;
+		}
+	}
+	if (last != -1)
+		goto nextline;
+}
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-s] [-d list] file ...\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	struct fdescr *dsc;
+	Rune *delim_rune = NULL;
+	size_t delim_runelen, i, delim_bytelen = 1;
+	int seq = 0, ret = 0;
+	char *delim = "\t";
+
+	ARGBEGIN {
+	case 's':
+		seq = 1;
+		break;
+	case 'd':
+		delim = EARGF(usage());
+		delim_bytelen = unescape(delim);
+		break;
+	default:
+		usage();
+	} ARGEND
+
+	if (!argc)
+		usage();
+
+	/* populate delimiters */
+	delim_rune = ereallocarray(NULL,
+		utfmemlen(delim, delim_bytelen) + 1, sizeof(*delim_rune));
+	if (!(delim_runelen = utfntorunestr(delim, delim_bytelen, delim_rune))) {
+		usage();
+	}
+
+	/* populate file list */
+	dsc = ereallocarray(NULL, argc, sizeof(*dsc));
+
+	for (i = 0; i < argc; i++) {
+		if (!strcmp(argv[i], "-")) {
+			argv[i] = "<stdin>";
+			dsc[i].fp = stdin;
+		} else if (!(dsc[i].fp = fopen(argv[i], "r"))) {
+			eprintf("fopen %s:", argv[i]);
+		}
+		dsc[i].name = argv[i];
+	}
+
+	if (seq) {
+		sequential(dsc, argc, delim_rune, delim_runelen);
+	} else {
+		parallel(dsc, argc, delim_rune, delim_runelen);
+	}
+
+	for (i = 0; i < argc; i++)
+		if (dsc[i].fp != stdin && fshut(dsc[i].fp, argv[i]))
+			ret |= fshut(dsc[i].fp, argv[i]);
+
+	ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
+
+	return ret;
+}