From af4e630a29e8ddcb11f377d3b0e6f6d580040313 Mon Sep 17 00:00:00 2001
From: Jan Breuer <jan.breuer@jaybee.cz>
Date: 周五, 12 12月 2014 17:50:29 +0800
Subject: [PATCH] Parser refactoring
---
libscpi/src/fifo.c | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/libscpi/src/fifo.c b/libscpi/src/fifo.c
index 7011030..341bc8e 100644
--- a/libscpi/src/fifo.c
+++ b/libscpi/src/fifo.c
@@ -1,17 +1,31 @@
#include "fifo_private.h"
+/**
+ * Initialize fifo
+ * @param fifo
+ */
void fifo_init(scpi_fifo_t * fifo) {
fifo->wr = 0;
fifo->rd = 0;
fifo->size = FIFO_SIZE;
}
+/**
+ * Empty fifo
+ * @param fifo
+ */
void fifo_clear(scpi_fifo_t * fifo) {
fifo->wr = 0;
fifo->rd = 0;
}
+/**
+ * Add element to fifo. If fifo is full, remove last element.
+ * @param fifo
+ * @param value
+ * @return
+ */
scpi_bool_t fifo_add(scpi_fifo_t * fifo, int16_t value) {
/* FIFO full? */
if (fifo->wr == ((fifo->rd + fifo->size) % (fifo->size + 1))) {
@@ -24,6 +38,12 @@
return TRUE;
}
+/**
+ * Remove element form fifo
+ * @param fifo
+ * @param value
+ * @return FALSE - fifo is empty
+ */
scpi_bool_t fifo_remove(scpi_fifo_t * fifo, int16_t * value) {
/* FIFO empty? */
if (fifo->wr == fifo->rd) {
@@ -39,6 +59,12 @@
return TRUE;
}
+/**
+ * Retrive number of elements in fifo
+ * @param fifo
+ * @param value
+ * @return
+ */
scpi_bool_t fifo_count(scpi_fifo_t * fifo, int16_t * value) {
*value = fifo->wr - fifo->rd;
if (*value < 0) {
--
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