[PATCH 01/19] Add struct pathspec

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

This struct for now is just a wrapper for the current pathspec form:
const char **. It is intended to be extended with more useful
pathspec-related information over time.

The data structure for passing pathspec around remains const char **,
struct pathspec will be initialized locally to be used and destroyed.
Hopefully all pathspec related code will be gradually migrated to pass
this struct instead.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 cache.h |    7 +++++++
 dir.c   |   18 ++++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/cache.h b/cache.h
index 2ef2fa3..3330769 100644
--- a/cache.h
+++ b/cache.h
@@ -493,6 +493,13 @@ extern int index_name_is_other(const struct index_state *, const char *, int);
 extern int ie_match_stat(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 extern int ie_modified(const struct index_state *, struct cache_entry *, struct stat *, unsigned int);
 
+struct pathspec {
+	const char **raw; /* get_pathspec() result, not freed by free_pathspec() */
+	int nr;
+};
+
+extern int init_pathspec(struct pathspec *, const char **);
+extern void free_pathspec(struct pathspec *);
 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, enum object_type type, const char *path);
 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
diff --git a/dir.c b/dir.c
index 133f472..205adc4 100644
--- a/dir.c
+++ b/dir.c
@@ -1071,3 +1071,21 @@ int remove_path(const char *name)
 	return 0;
 }
 
+int init_pathspec(struct pathspec *pathspec, const char **paths)
+{
+	const char **p = paths;
+
+	memset(pathspec, 0, sizeof(*pathspec));
+	if (!p)
+		return 0;
+	while (*p)
+		p++;
+	pathspec->raw = paths;
+	pathspec->nr = p - paths;
+	return 0;
+}
+
+void free_pathspec(struct pathspec *pathspec)
+{
+	; /* do nothing */
+}
-- 
1.7.3.3.476.g10a82