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authorPeter Tyser <ptyser@xes-inc.com>2009-11-09 15:17:50 -0600
committerWolfgang Denk <wd@denx.de>2009-12-02 23:19:32 +0100
commit9ef78511cda39987e5fc10febf386fd19f58ecf7 (patch)
tree138195677feb52131cf7f4074739901a7be101cf /common/circbuf.c
parent604f7ce55ad74694ef8743ad2e99933dc0265e46 (diff)
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circbuf: Move to lib_generic and conditionally compile
circbuf could be used as a generic library and is only currently needed when CONFIG_USB_TTY is defined. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'common/circbuf.c')
-rw-r--r--common/circbuf.c110
1 files changed, 0 insertions, 110 deletions
diff --git a/common/circbuf.c b/common/circbuf.c
deleted file mode 100644
index 2332c63..0000000
--- a/common/circbuf.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * (C) Copyright 2003
- * Gerry Hamel, geh@ti.com, Texas Instruments
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <common.h>
-#include <malloc.h>
-
-#include <circbuf.h>
-
-
-int buf_init (circbuf_t * buf, unsigned int size)
-{
- assert (buf != NULL);
-
- buf->size = 0;
- buf->totalsize = size;
- buf->data = (char *) malloc (sizeof (char) * size);
- assert (buf->data != NULL);
-
- buf->top = buf->data;
- buf->tail = buf->data;
- buf->end = &(buf->data[size]);
-
- return 1;
-}
-
-int buf_free (circbuf_t * buf)
-{
- assert (buf != NULL);
- assert (buf->data != NULL);
-
- free (buf->data);
- memset (buf, 0, sizeof (circbuf_t));
-
- return 1;
-}
-
-int buf_pop (circbuf_t * buf, char *dest, unsigned int len)
-{
- unsigned int i;
- char *p = buf->top;
-
- assert (buf != NULL);
- assert (dest != NULL);
-
- /* Cap to number of bytes in buffer */
- if (len > buf->size)
- len = buf->size;
-
- for (i = 0; i < len; i++) {
- dest[i] = *p++;
- /* Bounds check. */
- if (p == buf->end) {
- p = buf->data;
- }
- }
-
- /* Update 'top' pointer */
- buf->top = p;
- buf->size -= len;
-
- return len;
-}
-
-int buf_push (circbuf_t * buf, const char *src, unsigned int len)
-{
- /* NOTE: this function allows push to overwrite old data. */
- unsigned int i;
- char *p = buf->tail;
-
- assert (buf != NULL);
- assert (src != NULL);
-
- for (i = 0; i < len; i++) {
- *p++ = src[i];
- if (p == buf->end) {
- p = buf->data;
- }
- /* Make sure pushing too much data just replaces old data */
- if (buf->size < buf->totalsize) {
- buf->size++;
- } else {
- buf->top++;
- if (buf->top == buf->end) {
- buf->top = buf->data;
- }
- }
- }
-
- /* Update 'tail' pointer */
- buf->tail = p;
-
- return len;
-}