[PATCH 01/34] am: release strbufs after use in detect_patch_format()

[Rene Scharfe <l.s.r@web.de>]

Don't reset the strbufs l2 and l3 before use as if they were static, but
release them at the end instead.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
---
 builtin/am.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index c369dd1dce..3c50b03faa 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -633,73 +633,73 @@ static int is_mail(FILE *fp)
 static int detect_patch_format(const char **paths)
 {
 	enum patch_format ret = PATCH_FORMAT_UNKNOWN;
 	struct strbuf l1 = STRBUF_INIT;
 	struct strbuf l2 = STRBUF_INIT;
 	struct strbuf l3 = STRBUF_INIT;
 	FILE *fp;
 
 	/*
 	 * We default to mbox format if input is from stdin and for directories
 	 */
 	if (!*paths || !strcmp(*paths, "-") || is_directory(*paths))
 		return PATCH_FORMAT_MBOX;
 
 	/*
 	 * Otherwise, check the first few lines of the first patch, starting
 	 * from the first non-blank line, to try to detect its format.
 	 */
 
 	fp = xfopen(*paths, "r");
 
 	while (!strbuf_getline(&l1, fp)) {
 		if (l1.len)
 			break;
 	}
 
 	if (starts_with(l1.buf, "From ") || starts_with(l1.buf, "From: ")) {
 		ret = PATCH_FORMAT_MBOX;
 		goto done;
 	}
 
 	if (starts_with(l1.buf, "# This series applies on GIT commit")) {
 		ret = PATCH_FORMAT_STGIT_SERIES;
 		goto done;
 	}
 
 	if (!strcmp(l1.buf, "# HG changeset patch")) {
 		ret = PATCH_FORMAT_HG;
 		goto done;
 	}
 
-	strbuf_reset(&l2);
 	strbuf_getline(&l2, fp);
-	strbuf_reset(&l3);
 	strbuf_getline(&l3, fp);
 
 	/*
 	 * If the second line is empty and the third is a From, Author or Date
 	 * entry, this is likely an StGit patch.
 	 */
 	if (l1.len && !l2.len &&
 		(starts_with(l3.buf, "From:") ||
 		 starts_with(l3.buf, "Author:") ||
 		 starts_with(l3.buf, "Date:"))) {
 		ret = PATCH_FORMAT_STGIT;
 		goto done;
 	}
 
 	if (l1.len && is_mail(fp)) {
 		ret = PATCH_FORMAT_MBOX;
 		goto done;
 	}
 
 done:
 	fclose(fp);
 	strbuf_release(&l1);
+	strbuf_release(&l2);
+	strbuf_release(&l3);
 	return ret;
 }
 
 /**
  * Splits out individual email patches from `paths`, where each path is either
  * a mbox file or a Maildir. Returns 0 on success, -1 on failure.
  */
-- 
2.14.1