1 files changed, 193 insertions, 0 deletions
diff --git a/src/seastar/dpdk/lib/librte_cmdline/cmdline_cirbuf.h b/src/seastar/dpdk/lib/librte_cmdline/cmdline_cirbuf.h
new file mode 100644
index 000000000..c23b211ad
--- /dev/null
+++ b/src/seastar/dpdk/lib/librte_cmdline/cmdline_cirbuf.h
@@ -0,0 +1,193 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation.
+ * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
+ * All rights reserved.
+ */
+
+#ifndef _CIRBUF_H_
+#define _CIRBUF_H_
+
+#include <rte_config.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * This structure is the header of a cirbuf type.
+ */
+struct cirbuf {
+	unsigned int maxlen;    /**< total len of the fifo (number of elements) */
+	unsigned int start;     /**< indice of the first elt */
+	unsigned int end;       /**< indice of the last elt */
+	unsigned int len;       /**< current len of fifo */
+	char *buf;
+};
+
+#ifdef RTE_LIBRTE_CMDLINE_DEBUG
+#define dprintf_(fmt, ...) printf("line %3.3d - " fmt "%.0s", __LINE__, __VA_ARGS__)
+#define dprintf(...) dprintf_(__VA_ARGS__, "dummy")
+#else
+#define dprintf(...) (void)0
+#endif
+
+
+/**
+ * Init the circular buffer
+ */
+int cirbuf_init(struct cirbuf *cbuf, char *buf, unsigned int start, unsigned int maxlen);
+
+
+/**
+ * Return 1 if the circular buffer is full
+ */
+#define CIRBUF_IS_FULL(cirbuf) ((cirbuf)->maxlen == (cirbuf)->len)
+
+/**
+ * Return 1 if the circular buffer is empty
+ */
+#define CIRBUF_IS_EMPTY(cirbuf) ((cirbuf)->len == 0)
+
+/**
+ * return current size of the circular buffer (number of used elements)
+ */
+#define CIRBUF_GET_LEN(cirbuf) ((cirbuf)->len)
+
+/**
+ * return size of the circular buffer (used + free elements)
+ */
+#define CIRBUF_GET_MAXLEN(cirbuf) ((cirbuf)->maxlen)
+
+/**
+ * return the number of free elts
+ */
+#define CIRBUF_GET_FREELEN(cirbuf) ((cirbuf)->maxlen - (cirbuf)->len)
+
+/**
+ * Iterator for a circular buffer
+ *   c: struct cirbuf pointer
+ *   i: an integer type internally used in the macro
+ *   e: char that takes the value for each iteration
+ */
+#define CIRBUF_FOREACH(c, i, e)                                 \
+	for ( i=0, e=(c)->buf[(c)->start] ;                     \
+		i<((c)->len) ;                                  \
+		i ++,  e=(c)->buf[((c)->start+i)%((c)->maxlen)])
+
+
+/**
+ * Add a character at head of the circular buffer. Return 0 on success, or
+ * a negative value on error.
+ */
+int cirbuf_add_head_safe(struct cirbuf *cbuf, char c);
+
+/**
+ * Add a character at head of the circular buffer. You _must_ check that you
+ * have enough free space in the buffer before calling this func.
+ */
+void cirbuf_add_head(struct cirbuf *cbuf, char c);
+
+/**
+ * Add a character at tail of the circular buffer. Return 0 on success, or
+ * a negative value on error.
+ */
+int cirbuf_add_tail_safe(struct cirbuf *cbuf, char c);
+
+/**
+ * Add a character at tail of the circular buffer. You _must_ check that you
+ * have enough free space in the buffer before calling this func.
+ */
+void cirbuf_add_tail(struct cirbuf *cbuf, char c);
+
+/**
+ * Remove a char at the head of the circular buffer. Return 0 on
+ * success, or a negative value on error.
+ */
+int cirbuf_del_head_safe(struct cirbuf *cbuf);
+
+/**
+ * Remove a char at the head of the circular buffer. You _must_ check
+ * that buffer is not empty before calling the function.
+ */
+void cirbuf_del_head(struct cirbuf *cbuf);
+
+/**
+ * Remove a char at the tail of the circular buffer. Return 0 on
+ * success, or a negative value on error.
+ */
+int cirbuf_del_tail_safe(struct cirbuf *cbuf);
+
+/**
+ * Remove a char at the tail of the circular buffer. You _must_ check
+ * that buffer is not empty before calling the function.
+ */
+void cirbuf_del_tail(struct cirbuf *cbuf);
+
+/**
+ * Return the head of the circular buffer. You _must_ check that
+ * buffer is not empty before calling the function.
+ */
+char cirbuf_get_head(struct cirbuf *cbuf);
+
+/**
+ * Return the tail of the circular buffer. You _must_ check that
+ * buffer is not empty before calling the function.
+ */
+char cirbuf_get_tail(struct cirbuf *cbuf);
+
+/**
+ * Add a buffer at head of the circular buffer. 'c' is a pointer to a
+ * buffer, and n is the number of char to add. Return the number of
+ * copied bytes on success, or a negative value on error.
+ */
+int cirbuf_add_buf_head(struct cirbuf *cbuf, const char *c, unsigned int n);
+
+/**
+ * Add a buffer at tail of the circular buffer. 'c' is a pointer to a
+ * buffer, and n is the number of char to add. Return the number of
+ * copied bytes on success, or a negative value on error.
+ */
+int cirbuf_add_buf_tail(struct cirbuf *cbuf, const char *c, unsigned int n);
+
+/**
+ * Remove chars at the head of the circular buffer. Return 0 on
+ * success, or a negative value on error.
+ */
+int cirbuf_del_buf_head(struct cirbuf *cbuf, unsigned int size);
+
+/**
+ * Remove chars at the tail of the circular buffer. Return 0 on
+ * success, or a negative value on error.
+ */
+int cirbuf_del_buf_tail(struct cirbuf *cbuf, unsigned int size);
+
+/**
+ * Copy a maximum of 'size' characters from the head of the circular
+ * buffer to a flat one pointed by 'c'. Return the number of copied
+ * chars.
+ */
+int cirbuf_get_buf_head(struct cirbuf *cbuf, char *c, unsigned int size);
+
+/**
+ * Copy a maximum of 'size' characters from the tail of the circular
+ * buffer to a flat one pointed by 'c'. Return the number of copied
+ * chars.
+ */
+int cirbuf_get_buf_tail(struct cirbuf *cbuf, char *c, unsigned int size);
+
+
+/**
+ * Set the start of the data to the index 0 of the internal buffer.
+ */
+int cirbuf_align_left(struct cirbuf *cbuf);
+
+/**
+ * Set the end of the data to the last index of the internal buffer.
+ */
+int cirbuf_align_right(struct cirbuf *cbuf);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _CIRBUF_H_ */