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pkt-line: add packet_write_fmt_gently()

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packet_write_fmt() would die in case of a write error even though for
some callers an error would be acceptable. Add packet_write_fmt_gently()
which writes a formatted pkt-line like packet_write_fmt() but does not
die in case of an error. The function is used in a subsequent patch.

Signed-off-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Lars Schneider 2016-10-16 16:20:31 -07:00 committed by Junio C Hamano
parent 2f60bdd1a8
commit 70428d1a52
2 changed files with 31 additions and 4 deletions
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34
pkt-line.c
View File

@ -125,16 +125,42 @@ static void format_packet(struct strbuf *out, const char *fmt, va_list args)
packet_trace(out->buf + orig_len + 4, n - 4, 1);
}
static int packet_write_fmt_1(int fd, int gently,
const char *fmt, va_list args)
{
struct strbuf buf = STRBUF_INIT;
ssize_t count;
format_packet(&buf, fmt, args);
count = write_in_full(fd, buf.buf, buf.len);
if (count == buf.len)
return 0;
if (!gently) {
check_pipe(errno);
die_errno("packet write with format failed");
}
return error("packet write with format failed");
}
void packet_write_fmt(int fd, const char *fmt, ...)
{
static struct strbuf buf = STRBUF_INIT;
va_list args;
strbuf_reset(&buf);
va_start(args, fmt);
format_packet(&buf, fmt, args);
packet_write_fmt_1(fd, 0, fmt, args);
va_end(args);
write_or_die(fd, buf.buf, buf.len);
}
int packet_write_fmt_gently(int fd, const char *fmt, ...)
{
int status;
va_list args;
va_start(args, fmt);
status = packet_write_fmt_1(fd, 1, fmt, args);
va_end(args);
return status;
}
void packet_buf_write(struct strbuf *buf, const char *fmt, ...)

1
pkt-line.h
View File

@ -23,6 +23,7 @@ void packet_flush(int fd);
void packet_write_fmt(int fd, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
void packet_buf_flush(struct strbuf *buf);
void packet_buf_write(struct strbuf *buf, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
int packet_write_fmt_gently(int fd, const char *fmt, ...) __attribute__((format (printf, 2, 3)));
/*
* Read a packetized line into the buffer, which must be at least size bytes