1 files changed, 126 insertions, 0 deletions
diff --git a/src/libgit2/buf.c b/src/libgit2/buf.c
new file mode 100644
index 000000000..652f5dd52
--- /dev/null
+++ b/src/libgit2/buf.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "buf.h"
+#include "common.h"
+
+int git_buf_sanitize(git_buf *buf)
+{
+	GIT_ASSERT_ARG(buf);
+
+	if (buf->reserved > 0)
+		buf->ptr[0] = '\0';
+	else
+		buf->ptr = git_str__initstr;
+
+	buf->size = 0;
+	return 0;
+}
+
+int git_buf_tostr(git_str *out, git_buf *buf)
+{
+	GIT_ASSERT_ARG(out);
+	GIT_ASSERT_ARG(buf);
+
+	if (git_buf_sanitize(buf) < 0)
+		return -1;
+
+	out->ptr = buf->ptr;
+	out->asize = buf->reserved;
+	out->size = buf->size;
+
+	buf->ptr = git_str__initstr;
+	buf->reserved = 0;
+	buf->size = 0;
+
+	return 0;
+}
+
+int git_buf_fromstr(git_buf *out, git_str *str)
+{
+	GIT_ASSERT_ARG(out);
+	GIT_ASSERT_ARG(str);
+
+	out->ptr = str->ptr;
+	out->reserved = str->asize;
+	out->size = str->size;
+
+	str->ptr = git_str__initstr;
+	str->asize = 0;
+	str->size = 0;
+
+	return 0;
+}
+
+void git_buf_dispose(git_buf *buf)
+{
+	if (!buf)
+		return;
+
+	if (buf->ptr != git_str__initstr)
+		git__free(buf->ptr);
+
+	buf->ptr = git_str__initstr;
+	buf->reserved = 0;
+	buf->size = 0;
+}
+
+#ifndef GIT_DEPRECATE_HARD
+int git_buf_grow(git_buf *buffer, size_t target_size)
+{
+	char *newptr;
+
+	if (buffer->reserved >= target_size)
+		return 0;
+
+	if (buffer->ptr == git_str__initstr)
+		newptr = git__malloc(target_size);
+	else
+		newptr = git__realloc(buffer->ptr, target_size);
+
+	if (!newptr)
+		return -1;
+
+	buffer->ptr = newptr;
+	buffer->reserved = target_size;
+	return 0;
+}
+
+int git_buf_set(git_buf *buffer, const void *data, size_t datalen)
+{
+	size_t alloclen;
+
+	GIT_ERROR_CHECK_ALLOC_ADD(&alloclen, datalen, 1);
+
+	if (git_buf_grow(buffer, alloclen) < 0)
+		return -1;
+
+	memmove(buffer->ptr, data, datalen);
+	buffer->size = datalen;
+	buffer->ptr[buffer->size] = '\0';
+
+	return 0;
+}
+
+int git_buf_is_binary(const git_buf *buf)
+{
+	git_str str = GIT_STR_INIT_CONST(buf->ptr, buf->size);
+	return git_str_is_binary(&str);
+}
+
+int git_buf_contains_nul(const git_buf *buf)
+{
+	git_str str = GIT_STR_INIT_CONST(buf->ptr, buf->size);
+	return git_str_contains_nul(&str);
+}
+
+void git_buf_free(git_buf *buffer)
+{
+	git_buf_dispose(buffer);
+}
+
+#endif