[PATCH v15 06/27] wrapper: move is_empty_file() and rename it as is_empty_or_missing_file()

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is_empty_file() can help to refactor a lot of code. This will be very
helpful in porting "git bisect" to C.

Suggested-by: Torsten Bögershausen <tboegi@xxxxxx>
Mentored-by: Lars Schneider <larsxschneider@xxxxxxxxx>
Mentored-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Signed-off-by: Pranit Bauva <pranit.bauva@xxxxxxxxx>
---
 builtin/am.c | 20 ++------------------
 cache.h      |  3 +++
 wrapper.c    | 13 +++++++++++++
 3 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/builtin/am.c b/builtin/am.c
index 739b34d..9e1e9d6 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -30,22 +30,6 @@
 #include "mailinfo.h"
 
 /**
- * Returns 1 if the file is empty or does not exist, 0 otherwise.
- */
-static int is_empty_file(const char *filename)
-{
-	struct stat st;
-
-	if (stat(filename, &st) < 0) {
-		if (errno == ENOENT)
-			return 1;
-		die_errno(_("could not stat %s"), filename);
-	}
-
-	return !st.st_size;
-}
-
-/**
  * Returns the length of the first line of msg.
  */
 static int linelen(const char *msg)
@@ -1324,7 +1308,7 @@ static int parse_mail(struct am_state *state, const char *mail)
 		goto finish;
 	}
 
-	if (is_empty_file(am_path(state, "patch"))) {
+	if (is_empty_or_missing_file(am_path(state, "patch"))) {
 		printf_ln(_("Patch is empty. Was it split wrong?"));
 		die_user_resolve(state);
 	}
@@ -1896,7 +1880,7 @@ static void am_run(struct am_state *state, int resume)
 		resume = 0;
 	}
 
-	if (!is_empty_file(am_path(state, "rewritten"))) {
+	if (!is_empty_or_missing_file(am_path(state, "rewritten"))) {
 		assert(state->rebasing);
 		copy_notes_for_rebase(state);
 		run_post_rewrite_hook(state);
diff --git a/cache.h b/cache.h
index b780a91..49f214b 100644
--- a/cache.h
+++ b/cache.h
@@ -1916,4 +1916,7 @@ void sleep_millisec(int millisec);
  */
 void safe_create_dir(const char *dir, int share);
 
+/* Return 1 if the file is empty or does not exists, 0 otherwise. */
+extern int is_empty_or_missing_file(const char *filename);
+
 #endif /* CACHE_H */
diff --git a/wrapper.c b/wrapper.c
index e7f1979..78f6431 100644
--- a/wrapper.c
+++ b/wrapper.c
@@ -679,3 +679,16 @@ void sleep_millisec(int millisec)
 {
 	poll(NULL, 0, millisec);
 }
+
+int is_empty_or_missing_file(const char *filename)
+{
+	struct stat st;
+
+	if (stat(filename, &st) < 0) {
+		if (errno == ENOENT)
+			return 1;
+		die_errno(_("could not stat %s"), filename);
+	}
+
+	return !st.st_size;
+}

--
https://github.com/git/git/pull/287




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