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test-pkt-line: add unpack-sideband subcommand 

Add an 'unpack-sideband' subcommand to the test-pkt-line helper to
enable unpacking packet line data sent multiplexed using a sideband.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Brandon Williams 2018-06-20 14:32:28 -07:00 committed by Junio C Hamano
parent 53f9a3e157
commit 4bcd37d3bc
1 changed files with 33 additions and 0 deletions
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33
t/helper/test-pkt-line.c
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@ -1,3 +1,4 @@
#include "cache.h"
#include "pkt-line.h"

static void pack_line(const char *line)
@ -48,6 +49,36 @@ static void unpack(void)
}
}

static void unpack_sideband(void)
{
struct packet_reader reader;
packet_reader_init(&reader, 0, NULL, 0,
PACKET_READ_GENTLE_ON_EOF |
PACKET_READ_CHOMP_NEWLINE);

while (packet_reader_read(&reader) != PACKET_READ_EOF) {
int band;
int fd;

switch (reader.status) {
case PACKET_READ_EOF:
break;
case PACKET_READ_NORMAL:
band = reader.line[0] & 0xff;
if (band < 1 || band > 2)
die("unexpected side band %d", band);
fd = band;

write_or_die(fd, reader.line + 1, reader.pktlen - 1);
break;
case PACKET_READ_FLUSH:
return;
case PACKET_READ_DELIM:
break;
}
}
}

int cmd_main(int argc, const char **argv)
{
if (argc < 2)
@ -57,6 +88,8 @@ int cmd_main(int argc, const char **argv)
pack(argc - 2, argv + 2);
else if (!strcmp(argv[1], "unpack"))
unpack();
else if (!strcmp(argv[1], "unpack-sideband"))
unpack_sideband();
else
die("invalid argument '%s'", argv[1]);