2 * IBM/3270 Driver -- Copyright (C) 2000 UTS Global LLC
4 * tubttyrcl.c -- Linemode Command-recall functionality
10 * Author: Richard Hitt
15 tty3270_rcl_init(tub_t *tubp)
17 return tty3270_rcl_resize(tubp, 20);
21 tty3270_rcl_resize(tub_t *tubp, int newrclk)
28 tty3270_rcl_purge(tubp),
29 kfree(tubp->tty_rclbufs);
30 tubp->tty_rclbufs = NULL;
33 if ((newrclb = (char *(*)[])kmalloc(
34 newrclk * sizeof (char *), GFP_KERNEL)) == NULL)
36 memset(newrclb, 0, newrclk * sizeof (char *));
37 if (tubp->tty_rclbufs != NULL) {
45 if ((data = (*tubp->tty_rclbufs)[i]) == NULL)
48 (*tubp->tty_rclbufs)[i] = NULL;
50 i = tubp->tty_rclk - 1;
52 tty3270_rcl_purge(tubp);
53 kfree(tubp->tty_rclbufs);
55 tubp->tty_rclbufs = newrclb;
56 tubp->tty_rclk = newrclk;
57 tubp->tty_rclp = newrclk - 1;
58 tty3270_rcl_sync(tubp);
63 tty3270_rcl_set(tub_t *tubp, char *buf, int count)
65 #define RCL_SIZ "recallsize="
66 #define L_RCL_SIZ (strlen(RCL_SIZ))
70 char *rcl_siz = RCL_SIZ;
71 int l_rcl_siz = L_RCL_SIZ;
73 if (count < l_rcl_siz || strncmp(buf, rcl_siz, l_rcl_siz) != 0)
75 if ((len = count - l_rcl_siz) == 0)
77 newsize = simple_strtoul(buf + l_rcl_siz, 0, 0);
78 rc = tty3270_rcl_resize(tubp, newsize);
79 return rc < 0? rc: count;
83 tty3270_rcl_fini(tub_t *tubp)
85 if (tubp->tty_rclbufs != NULL) {
86 tty3270_rcl_purge(tubp);
87 kfree(tubp->tty_rclbufs);
88 tubp->tty_rclbufs = NULL;
93 tty3270_rcl_purge(tub_t *tubp)
98 if (tubp->tty_rclbufs == NULL)
100 for (i = 0; i < tubp->tty_rclk; i++) {
101 if ((buf = (*tubp->tty_rclbufs)[i]) == NULL)
104 (*tubp->tty_rclbufs)[i] = NULL;
109 tty3270_rcl_get(tub_t *tubp, char *buf, int len, int inc)
115 if (tubp->tty_rclbufs == NULL)
117 if (tubp->tty_rclk <= 0) /* overcautious */
119 if (inc != 1 && inc != -1) /* overcautious */
122 if ((i = tubp->tty_rclb) == -1) {
129 for (iter = tubp->tty_rclk; iter; iter--, i += inc) {
131 i = tubp->tty_rclk - 1;
132 else if (i >= tubp->tty_rclk)
134 if ((*tubp->tty_rclbufs)[i] != NULL)
137 if (iter < 0 || (data = (*tubp->tty_rclbufs)[i]) == NULL)
140 if ((len = MIN(len - 1, strlen(data))) <= 0)
142 memcpy(buf, data, len);
148 tty3270_rcl_put(tub_t *tubp, char *data, int len)
153 if (tubp->tty_rclbufs == NULL)
156 if (tubp->tty_rclk <= 0) /* overcautious */
159 /* If input area is invisible, don't log */
160 if (tubp->tty_inattr == TF_INPUTN)
163 /* If this & most recent cmd text match, don't log */
164 if ((buf = (*tubp->tty_rclbufs)[tubp->tty_rclp]) != NULL &&
165 strlen(buf) == len && memcmp(buf, data, len) == 0) {
166 tty3270_rcl_sync(tubp);
170 /* Don't stack zero-length commands */
172 tty3270_rcl_sync(tubp);
177 if (++i == tubp->tty_rclk)
179 bufp = &(*tubp->tty_rclbufs)[i];
180 if (*bufp == NULL || strlen(*bufp) < len + 1) {
185 if ((*bufp = kmalloc(len + 1, GFP_ATOMIC)) == NULL)
188 memcpy(*bufp, data, len);
191 tty3270_rcl_sync(tubp);
195 tty3270_rcl_sync(tub_t *tubp)