[PATCH v10 02/21] strbuf.c: add `strbuf_join_argv()`

[Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com>]

Implement `strbuf_join_argv()` to join arguments
into a strbuf.

Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com>
---
 strbuf.c | 13 +++++++++++++
 strbuf.h |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/strbuf.c b/strbuf.c
index 64041c3c24..c8a104099a 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -259,6 +259,19 @@ void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
 	strbuf_setlen(sb, sb->len + sb2->len);
 }
 
+void strbuf_join_argv(struct strbuf *buf,
+		      int argc, const char **argv, char delim)
+{
+	if (!argc)
+		return;
+
+	strbuf_addstr(buf, *argv);
+	while (--argc) {
+		strbuf_addch(buf, delim);
+		strbuf_addstr(buf, *(++argv));
+	}
+}
+
 void strbuf_addchars(struct strbuf *sb, int c, size_t n)
 {
 	strbuf_grow(sb, n);
diff --git a/strbuf.h b/strbuf.h
index 60a35aef16..4ec912f4b7 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -284,6 +284,13 @@ static inline void strbuf_addstr(struct strbuf *sb, const char *s)
  */
 extern void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2);
 
+/**
+ * Join the arguments into a buffer. `delim` is put between every
+ * two arguments.
+ */
+extern void strbuf_join_argv(struct strbuf *buf, int argc,
+			     const char **argv, char delim);
+
 /**
  * This function can be used to expand a format string containing
  * placeholders. To that end, it parses the string and calls the specified
-- 
2.19.0.rc0.23.g10a62394e7