diff options
Diffstat (limited to 'xorg-server/hw/xfree86/common/xisb.c')
| -rw-r--r-- | xorg-server/hw/xfree86/common/xisb.c | 342 |
1 files changed, 168 insertions, 174 deletions
diff --git a/xorg-server/hw/xfree86/common/xisb.c b/xorg-server/hw/xfree86/common/xisb.c index 287a98b53..3568a578c 100644 --- a/xorg-server/hw/xfree86/common/xisb.c +++ b/xorg-server/hw/xfree86/common/xisb.c @@ -1,174 +1,168 @@ -/*
- * Copyright (c) 1997 Metro Link Incorporated
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
- * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- * Except as contained in this notice, the name of the Metro Link shall not be
- * used in advertising or otherwise to promote the sale, use or other dealings
- * in this Software without prior written authorization from Metro Link.
- *
- */
-
-/*
- X Input Serial Buffer routines for use in any XInput driver that accesses
- a serial device.
-*/
-
-
-/*****************************************************************************
- * Standard Headers
- ****************************************************************************/
-
-#ifdef HAVE_XORG_CONFIG_H
-#include <xorg-config.h>
-#endif
-
-#include <misc.h>
-#include <xf86.h>
-#include <xf86_OSproc.h>
-#include <xf86_OSlib.h>
-#include <xf86Xinput.h>
-#include "xisb.h"
-
-/*****************************************************************************
- * Local Headers
- ****************************************************************************/
-
-/*****************************************************************************
- * Variables without includable headers
- ****************************************************************************/
-
-/*****************************************************************************
- * Local Variables
- ****************************************************************************/
-
-/*****************************************************************************
- * Function Definitions
- ****************************************************************************/
-
-XISBuffer *
-XisbNew (int fd, ssize_t size)
-{
- XISBuffer *b;
-
- b = malloc(sizeof (XISBuffer));
- if (!b)
- return NULL;
- b->buf = malloc((sizeof (unsigned char) * size));
- if (!b->buf)
- {
- free(b);
- return NULL;
- }
-
- b->fd = fd;
- b->trace = 0;
- b->block_duration = 0;
- b->current = 1; /* force it to be past the end to trigger initial read */
- b->end = 0;
- b->buffer_size = size;
- return b;
-}
-
-void
-XisbFree (XISBuffer *b)
-{
- free(b->buf);
- free(b);
-}
-
-int
-XisbRead (XISBuffer *b)
-{
- int ret;
-
- if (b->current >= b->end)
- {
- if (b->block_duration >= 0)
- {
- if (xf86WaitForInput (b->fd, b->block_duration) < 1)
- return -1;
- }
- else
- {
- /*
- * automatically clear it so if XisbRead is called in a loop
- * the next call will make sure there is data with select and
- * thus prevent a blocking read
- */
- b->block_duration = 0;
- }
-
- ret = xf86ReadSerial (b->fd, b->buf, b->buffer_size);
- switch (ret)
- {
- case 0:
- return -1; /* timeout */
- case -1:
- return -2; /* error */
- default:
- b->end = ret;
- b->current = 0;
- break;
- }
- }
- if (b->trace)
- ErrorF ("read 0x%02x (%c)\n", b->buf[b->current],
- isprint(b->buf[b->current])?b->buf[b->current]:'.');
-
- return b->buf[b->current++];
-}
-
-/* the only purpose of this function is to provide output tracing */
-ssize_t
-XisbWrite (XISBuffer *b, unsigned char *msg, ssize_t len)
-{
- if (b->trace)
- {
- int i = 0;
- for (i = 0; i < len; i++)
- ErrorF ("\t\twrote 0x%02x (%c)\n", msg[i], msg[i]);
- }
- return (xf86WriteSerial (b->fd, msg, len));
-}
-
-/* turn tracing of this buffer on (1) or off (0) */
-void
-XisbTrace (XISBuffer *b, int trace)
-{
- b->trace = trace;
-}
-
-/*
- * specify a block_duration of -1 when you know the buffer's fd is ready to
- * read. After a read, it is automatically set to 0 so that the next read
- * will use check to select for data and prevent a block.
- * It is the caller's responsibility to set the block_duration to -1 if it
- * knows that there is data to read (because the main select loop triggered
- * the read) and want's to avoid the unnecessary overhead of the select call
- *
- * a zero or positive block duration will cause the select to block for the
- * give duration in usecs.
- */
-
-void
-XisbBlockDuration (XISBuffer *b, int block_duration)
-{
- b->block_duration = block_duration;
-}
+/* + * Copyright (c) 1997 Metro Link Incorporated + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF + * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Except as contained in this notice, the name of the Metro Link shall not be + * used in advertising or otherwise to promote the sale, use or other dealings + * in this Software without prior written authorization from Metro Link. + * + */ + +/* + X Input Serial Buffer routines for use in any XInput driver that accesses + a serial device. +*/ + +/***************************************************************************** + * Standard Headers + ****************************************************************************/ + +#ifdef HAVE_XORG_CONFIG_H +#include <xorg-config.h> +#endif + +#include <misc.h> +#include <xf86.h> +#include <xf86_OSproc.h> +#include <xf86_OSlib.h> +#include <xf86Xinput.h> +#include "xisb.h" + +/***************************************************************************** + * Local Headers + ****************************************************************************/ + +/***************************************************************************** + * Variables without includable headers + ****************************************************************************/ + +/***************************************************************************** + * Local Variables + ****************************************************************************/ + +/***************************************************************************** + * Function Definitions + ****************************************************************************/ + +XISBuffer * +XisbNew(int fd, ssize_t size) +{ + XISBuffer *b; + + b = malloc(sizeof(XISBuffer)); + if (!b) + return NULL; + b->buf = malloc((sizeof(unsigned char) * size)); + if (!b->buf) { + free(b); + return NULL; + } + + b->fd = fd; + b->trace = 0; + b->block_duration = 0; + b->current = 1; /* force it to be past the end to trigger initial read */ + b->end = 0; + b->buffer_size = size; + return b; +} + +void +XisbFree(XISBuffer * b) +{ + free(b->buf); + free(b); +} + +int +XisbRead(XISBuffer * b) +{ + int ret; + + if (b->current >= b->end) { + if (b->block_duration >= 0) { + if (xf86WaitForInput(b->fd, b->block_duration) < 1) + return -1; + } + else { + /* + * automatically clear it so if XisbRead is called in a loop + * the next call will make sure there is data with select and + * thus prevent a blocking read + */ + b->block_duration = 0; + } + + ret = xf86ReadSerial(b->fd, b->buf, b->buffer_size); + switch (ret) { + case 0: + return -1; /* timeout */ + case -1: + return -2; /* error */ + default: + b->end = ret; + b->current = 0; + break; + } + } + if (b->trace) + ErrorF("read 0x%02x (%c)\n", b->buf[b->current], + isprint(b->buf[b->current]) ? b->buf[b->current] : '.'); + + return b->buf[b->current++]; +} + +/* the only purpose of this function is to provide output tracing */ +ssize_t +XisbWrite(XISBuffer * b, unsigned char *msg, ssize_t len) +{ + if (b->trace) { + int i = 0; + + for (i = 0; i < len; i++) + ErrorF("\t\twrote 0x%02x (%c)\n", msg[i], msg[i]); + } + return (xf86WriteSerial(b->fd, msg, len)); +} + +/* turn tracing of this buffer on (1) or off (0) */ +void +XisbTrace(XISBuffer * b, int trace) +{ + b->trace = trace; +} + +/* + * specify a block_duration of -1 when you know the buffer's fd is ready to + * read. After a read, it is automatically set to 0 so that the next read + * will use check to select for data and prevent a block. + * It is the caller's responsibility to set the block_duration to -1 if it + * knows that there is data to read (because the main select loop triggered + * the read) and want's to avoid the unnecessary overhead of the select call + * + * a zero or positive block duration will cause the select to block for the + * give duration in usecs. + */ + +void +XisbBlockDuration(XISBuffer * b, int block_duration) +{ + b->block_duration = block_duration; +} |