strbuf: introduce strbuf_getline_{lf,nul}()

The strbuf_getline() interface allows a byte other than LF or NUL as
the line terminator, but this is only because I wrote these
codepaths anticipating that there might be a value other than NUL
and LF that could be useful when I introduced line_termination long
time ago.  No useful caller that uses other value has emerged.

By now, it is clear that the interface is overly broad without a
good reason.  Many codepaths have hardcoded preference to read
either LF terminated or NUL terminated records from their input, and
then call strbuf_getline() with LF or NUL as the third parameter.

This step introduces two thin wrappers around strbuf_getline(),
namely, strbuf_getline_lf() and strbuf_getline_nul(), and
mechanically rewrites these call sites to call either one of
them.  The changes contained in this patch are:

 * introduction of these two functions in strbuf.[ch]

 * mechanical conversion of all callers to strbuf_getline() with
   either '\n' or '\0' as the third parameter to instead call the
   respective thin wrapper.

After this step, output from "git grep 'strbuf_getline('" would
become a lot smaller.  An interim goal of this series is to make
this an empty set, so that we can have strbuf_getline_crlf() take
over the shorter name strbuf_getline().

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/remote-curl.c b/remote-curl.c
index f404faf0f4..c7048575fb 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -827,7 +827,7 @@ static void parse_fetch(struct strbuf *buf)
 			die("http transport does not support %s", buf->buf);
 
 		strbuf_reset(buf);
-		if (strbuf_getline(buf, stdin, '\n') == EOF)
+		if (strbuf_getline_lf(buf, stdin) == EOF)
 			return;
 		if (!*buf->buf)
 			break;
@@ -940,7 +940,7 @@ static void parse_push(struct strbuf *buf)
 			die("http transport does not support %s", buf->buf);
 
 		strbuf_reset(buf);
-		if (strbuf_getline(buf, stdin, '\n') == EOF)
+		if (strbuf_getline_lf(buf, stdin) == EOF)
 			goto free_specs;
 		if (!*buf->buf)
 			break;
@@ -990,7 +990,7 @@ int main(int argc, const char **argv)
 	do {
 		const char *arg;
 
-		if (strbuf_getline(&buf, stdin, '\n') == EOF) {
+		if (strbuf_getline_lf(&buf, stdin) == EOF) {
 			if (ferror(stdin))
 				error("remote-curl: error reading command stream from git");
 			return 1;