(buffer): Add parserutils_buffer_appendv()

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

2 files changed, 35 insertions, 0 deletions

diff --git a/include/parserutils/utils/buffer.h b/include/parserutils/utils/buffer.h
index 5f8f696..5b8b793 100644
--- a/include/parserutils/utils/buffer.h
+++ b/include/parserutils/utils/buffer.h
@@ -30,6 +30,8 @@ parserutils_error parserutils_buffer_destroy(parserutils_buffer *buffer);
 
 parserutils_error parserutils_buffer_append(parserutils_buffer *buffer, 
 		const uint8_t *data, size_t len);
+parserutils_error parserutils_buffer_appendv(parserutils_buffer *buffer,
+		size_t count, ...);
 parserutils_error parserutils_buffer_insert(parserutils_buffer *buffer, 
 		size_t offset, const uint8_t *data, size_t len);
 parserutils_error parserutils_buffer_discard(parserutils_buffer *buffer, 
diff --git a/src/utils/buffer.c b/src/utils/buffer.c
index 5e0f58c..b568948 100644
--- a/src/utils/buffer.c
+++ b/src/utils/buffer.c
@@ -6,6 +6,7 @@
  */
 
 #include <string.h>
+#include <stdarg.h>
 
 #include <parserutils/utils/buffer.h>
 
@@ -131,6 +132,38 @@ parserutils_error parserutils_buffer_append(parserutils_buffer *buffer,
 }
 
 /**
+ * Append multiple data blocks to a memory buffer.
+ *
+ * Each data block must be passed as a pair of const uint8_t* and size_t
+ *
+ * \param buffer  The buffer to append to
+ * \param count   The number of data blocks to append
+ * \param ...     The pairs of pointer and size
+ * \return PARSERUTILS_OK on success, appropriate error otherwise.
+*/
+parserutils_error parserutils_buffer_appendv(parserutils_buffer *buffer,
+		size_t count, ...)
+{
+	va_list ap;
+	parserutils_error error;
+	const uint8_t *data;
+	size_t len;
+
+	va_start(ap, count);
+	while (count > 0) {
+		data = va_arg(ap, const uint8_t *);
+		len = va_arg(ap, size_t);
+		error = parserutils_buffer_append(buffer, data, len);
+		if (error != PARSERUTILS_OK)
+			break;
+		count--;
+	}
+	va_end(ap);
+
+	return error;
+}
+
+/**
  * Insert data into a memory buffer
  *
  * \param buffer  The buffer to insert into