diff options
authorRené Scharfe <>2007-11-10 11:16:05 (GMT)
committerJunio C Hamano <>2007-11-11 10:04:46 (GMT)
commit91db267ec849279053cf3ac3066c2f2c11db4321 (patch)
parentf29d59586c2a1666d18776cca5d96752dec0e8a2 (diff)
add strbuf_adddup()
Add a new function, strbuf_adddup(), that appends a duplicate of a part of a struct strbuf to end of the latter. Signed-off-by: Rene Scharfe <> Signed-off-by: Junio C Hamano <>
2 files changed, 8 insertions, 0 deletions
diff --git a/strbuf.c b/strbuf.c
index 536b432..dbd8c4b 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -106,6 +106,13 @@ void strbuf_add(struct strbuf *sb, const void *data, size_t len)
strbuf_setlen(sb, sb->len + len);
+void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
+ strbuf_grow(sb, len);
+ memcpy(sb->buf + sb->len, sb->buf + pos, len);
+ strbuf_setlen(sb, sb->len + len);
void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
int len;
diff --git a/strbuf.h b/strbuf.h
index 21d8944..1391912 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -101,6 +101,7 @@ static inline void strbuf_addstr(struct strbuf *sb, const char *s) {
static inline void strbuf_addbuf(struct strbuf *sb, struct strbuf *sb2) {
strbuf_add(sb, sb2->buf, sb2->len);
+extern void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len);
typedef void (*expand_fn_t) (struct strbuf *sb, const char *placeholder, void *context);
extern void strbuf_expand(struct strbuf *sb, const char *format, const char **placeholders, expand_fn_t fn, void *context);