patch-2.4.4 linux/drivers/s390/char/tubttyrcl.c

• Lines: 200
• Date: Wed Apr 11 19:02:28 2001
• Orig file: v2.4.3/linux/drivers/s390/char/tubttyrcl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/drivers/s390/char/tubttyrcl.c linux/drivers/s390/char/tubttyrcl.c
@@ -0,0 +1,199 @@
+/*
+ *  IBM/3270 Driver -- Copyright (C) 2000 UTS Global LLC
+ *
+ *  tubttyrcl.c -- Linemode Command-recall functionality
+ *
+ *
+ *
+ *
+ *
+ *  Author:  Richard Hitt
+ */
+#include "tubio.h"
+
+int
+tty3270_rcl_init(tub_t *tubp)
+{
+	return tty3270_rcl_resize(tubp, 20);
+}
+
+int
+tty3270_rcl_resize(tub_t *tubp, int newrclk)
+{
+	char *(*newrclb)[];
+
+	if (newrclk > 1000)
+		return -EINVAL;
+	if (newrclk <= 0) {
+		tty3270_rcl_purge(tubp),
+		kfree(tubp->tty_rclbufs);
+		tubp->tty_rclbufs = NULL;
+		return 0;
+	}
+	if ((newrclb = (char *(*)[])kmalloc(
+	    newrclk * sizeof (char *), GFP_KERNEL)) == NULL)
+		return -ENOMEM;
+	memset(newrclb, 0, newrclk * sizeof (char *));
+	if (tubp->tty_rclbufs != NULL) {
+		int i, j, k;
+		char *data;
+
+		i = tubp->tty_rclp;
+		j = newrclk;
+		k = tubp->tty_rclk;
+		while (j-- && k--) {
+			if ((data = (*tubp->tty_rclbufs)[i]) == NULL)
+				break;
+			(*newrclb)[j] = data;
+			(*tubp->tty_rclbufs)[i] = NULL;
+			if (--i < 0)
+				i = tubp->tty_rclk - 1;
+		}
+		tty3270_rcl_purge(tubp);
+		kfree(tubp->tty_rclbufs);
+	}
+	tubp->tty_rclbufs = newrclb;
+	tubp->tty_rclk = newrclk;
+	tubp->tty_rclp = newrclk - 1;
+	tty3270_rcl_sync(tubp);
+	return 0;
+}
+
+int
+tty3270_rcl_set(tub_t *tubp, char *buf, int count)
+{
+#define RCL_SIZ "recallsize="
+#define L_RCL_SIZ (strlen(RCL_SIZ))
+	int newsize;
+	int len;
+	int rc;
+	char *rcl_siz = RCL_SIZ;
+	int l_rcl_siz = L_RCL_SIZ;
+
+	if (count < l_rcl_siz || strncmp(buf, rcl_siz, l_rcl_siz) != 0)
+		return 0;
+	if ((len = count - l_rcl_siz) == 0)
+		return count;
+	newsize = simple_strtoul(buf + l_rcl_siz, 0, 0);
+	rc = tty3270_rcl_resize(tubp, newsize);
+	return rc < 0? rc: count;
+}
+
+void
+tty3270_rcl_fini(tub_t *tubp)
+{
+	if (tubp->tty_rclbufs != NULL) {
+		tty3270_rcl_purge(tubp);
+		kfree(tubp->tty_rclbufs);
+		tubp->tty_rclbufs = NULL;
+	}
+}
+
+void
+tty3270_rcl_purge(tub_t *tubp)
+{
+	int i;
+	char *buf;
+
+	if (tubp->tty_rclbufs == NULL)
+		return;
+	for (i = 0; i < tubp->tty_rclk; i++) {
+		if ((buf = (*tubp->tty_rclbufs)[i]) == NULL)
+			continue;
+		kfree(buf);
+		(*tubp->tty_rclbufs)[i] = NULL;
+	}
+}
+
+int
+tty3270_rcl_get(tub_t *tubp, char *buf, int len, int inc)
+{
+	int iter;
+	int i;
+	char *data;
+
+	if (tubp->tty_rclbufs == NULL)
+		return 0;
+	if (tubp->tty_rclk <= 0)	/* overcautious */
+		return 0;
+	if (inc != 1 && inc != -1)	/* overcautious */
+		return 0;
+
+	if ((i = tubp->tty_rclb) == -1) {
+		i = tubp->tty_rclp;
+		if (inc == 1)
+			i++;
+	} else {
+		i += inc;
+	}
+	for (iter = tubp->tty_rclk; iter; iter--, i += inc) {
+		if (i < 0)
+			i = tubp->tty_rclk - 1;
+		else if (i >= tubp->tty_rclk)
+			i = 0;
+		if ((*tubp->tty_rclbufs)[i] != NULL)
+			break;
+	}
+	if (iter < 0 || (data = (*tubp->tty_rclbufs)[i]) == NULL)
+		return 0;
+	tubp->tty_rclb = i;
+	if ((len = MIN(len - 1, strlen(data))) <= 0)
+		return 0;
+	memcpy(buf, data, len);
+	buf[len] = '\0';
+	return len;
+}
+
+void
+tty3270_rcl_put(tub_t *tubp, char *data, int len)
+{
+	char *buf, **bufp;
+	int i;
+
+	if (tubp->tty_rclbufs == NULL)
+		return;
+
+	if (tubp->tty_rclk <= 0)        /* overcautious */
+		return;
+
+	/* If input area is invisible, don't log */
+	if (tubp->tty_inattr == TF_INPUTN)
+		return;
+
+	/* If this & most recent cmd text match, don't log */
+	if ((buf = (*tubp->tty_rclbufs)[tubp->tty_rclp]) != NULL &&
+	    strlen(buf) == len && memcmp(buf, data, len) == 0) {
+		tty3270_rcl_sync(tubp);
+		return;
+	}
+
+	/* Don't stack zero-length commands */
+	if (len == 0) {
+		tty3270_rcl_sync(tubp);
+		return;
+	}
+
+	i = tubp->tty_rclp;
+	if (++i == tubp->tty_rclk)
+		i = 0;
+	bufp = &(*tubp->tty_rclbufs)[i];
+	if (*bufp == NULL || strlen(*bufp) < len + 1) {
+		if (*bufp) {
+			kfree(*bufp);
+			*bufp = NULL;
+		}
+		if ((*bufp = kmalloc(len + 1, GFP_ATOMIC)) == NULL)
+			return;
+	}
+	memcpy(*bufp, data, len);
+	(*bufp)[len] = '\0';
+	tubp->tty_rclp = i;
+	tty3270_rcl_sync(tubp);
+}
+
+void
+tty3270_rcl_sync(tub_t *tubp)
+{
+	tubp->tty_rclb = -1;
+}
+