Those are helpers to build functions that transform a buffer into a
strbuf, allowing the "buffer" to be taken from the destination buffer.
Signed-off-by: Pierre Habouzit <madcoder@xxxxxxxxxx>
---
strbuf.c | 25 +++++++++++++++++++++++++
strbuf.h | 4 ++++
2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/strbuf.c b/strbuf.c
index f4201e1..40b3f87 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -51,6 +51,31 @@ void strbuf_grow(struct strbuf *sb, size_t extra)
ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
}
+void *strbuf_start_filter(struct strbuf *sb, const char *src, ssize_t hint)
+{
+ if (src < sb->buf || src >= sb->buf + sb->alloc) {
+ if (hint > 0 && (size_t)hint >= sb->alloc)
+ strbuf_grow(sb, hint - sb->len);
+ return NULL;
+ }
+
+ if (hint < 0)
+ return strbuf_detach(sb, NULL);
+
+ if ((size_t)hint >= sb->alloc) {
+ void *tmp = strbuf_detach(sb, NULL);
+ strbuf_grow(sb, hint);
+ return tmp;
+ }
+
+ return NULL;
+}
+
+void strbuf_end_filter(void *p)
+{
+ free(p);
+}
+
void strbuf_rtrim(struct strbuf *sb)
{
while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
diff --git a/strbuf.h b/strbuf.h
index 9b9e861..640bca4 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -76,6 +76,10 @@ static inline void strbuf_setlen(struct strbuf *sb, size_t len) {
}
#define strbuf_reset(sb) strbuf_setlen(sb, 0)
+/*----- filter API -----*/
+extern void *strbuf_start_filter(struct strbuf *, const char *, ssize_t);
+extern void strbuf_end_filter(void *p);
+
/*----- content related -----*/
extern void strbuf_rtrim(struct strbuf *);
extern int strbuf_cmp(struct strbuf *, struct strbuf *);
--
1.5.3.4.208.gc1d91-dirty
-
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