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pkt-line: extract set_packet_header() 

Extracted set_packet_header() function converts an integer to a 4 byte
hex string. Make this function locally available so that other pkt-line
functions could use it.

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 16:20:30 -07:00 committed by Junio C Hamano
parent 81c634e94f
commit 2f60bdd1a8
1 changed files with 13 additions and 6 deletions
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19
pkt-line.c
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@ -97,10 +97,20 @@ void packet_buf_flush(struct strbuf *buf)
strbuf_add(buf, "0000", 4);
}
#define hex(a) (hexchar[(a) & 15])
static void format_packet(struct strbuf *out, const char *fmt, va_list args)
static void set_packet_header(char *buf, const int size)
{
static char hexchar[] = "0123456789abcdef";
#define hex(a) (hexchar[(a) & 15])
buf[0] = hex(size >> 12);
buf[1] = hex(size >> 8);
buf[2] = hex(size >> 4);
buf[3] = hex(size);
#undef hex
}
static void format_packet(struct strbuf *out, const char *fmt, va_list args)
{
size_t orig_len, n;
orig_len = out->len;
@ -111,10 +121,7 @@ static void format_packet(struct strbuf *out, const char *fmt, va_list args)
if (n > LARGE_PACKET_MAX)
die("protocol error: impossibly long line");
out->buf[orig_len + 0] = hex(n >> 12);
out->buf[orig_len + 1] = hex(n >> 8);
out->buf[orig_len + 2] = hex(n >> 4);
out->buf[orig_len + 3] = hex(n);
set_packet_header(&out->buf[orig_len], n);
packet_trace(out->buf + orig_len + 4, n - 4, 1);
}