strbuf.c: add `strbuf_join_argv()`

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

Signed-off-by: Paul-Sebastian Ungureanu <ungureanupaulsebastian@gmail.com>
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/strbuf.c b/strbuf.c
index f6a6cf78b9426abfa73a2053c17326fd645645e7..82e90f1dfe92d731d143f713f8ea02b79b01da9d 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -268,6 +268,21 @@ void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
        strbuf_setlen(sb, sb->len + sb2->len);
 }
 
        strbuf_setlen(sb, sb->len + sb2->len);
 }
 

+const char *strbuf_join_argv(struct strbuf *buf,
+                            int argc, const char **argv, char delim)
+{
+       if (!argc)
+               return buf->buf;
+
+       strbuf_addstr(buf, *argv);
+       while (--argc) {
+               strbuf_addch(buf, delim);
+               strbuf_addstr(buf, *(++argv));
+       }
+
+       return buf->buf;
+}
+

 void strbuf_addchars(struct strbuf *sb, int c, size_t n)
 {
        strbuf_grow(sb, n);
 void strbuf_addchars(struct strbuf *sb, int c, size_t n)
 {
        strbuf_grow(sb, n);

diff --git a/strbuf.h b/strbuf.h
index fc40873b65124fc98a2e06150b7c8043f05ed4ab..be02150df393a7741096babb53fd390e1d3cc1fe 100644 (file)
--- a/strbuf.h
+++ b/strbuf.h
@@ -288,6 +288,13 @@ static inline void strbuf_addstr(struct strbuf *sb, const char *s)
  */
 void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2);
 
  */
 void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2);
 

+/**
+ * Join the arguments into a buffer. `delim` is put between every
+ * two arguments.
+ */
+const char *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
 /**
  * This function can be used to expand a format string containing
  * placeholders. To that end, it parses the string and calls the specified