static void logtraffic(unsigned char c, int logmode);
/*
+ * Resize a line to make it `cols' columns wide.
+ */
+unsigned long *resizeline(unsigned long *line, int cols)
+{
+ int i, oldlen;
+ unsigned long lineattrs;
+
+ if (line[0] != (unsigned long)cols) {
+ /*
+ * This line is the wrong length, which probably means it
+ * hasn't been accessed since a resize. Resize it now.
+ */
+ oldlen = line[0];
+ lineattrs = line[oldlen + 1];
+ line = srealloc(line, TSIZE * (2 + cols));
+ line[0] = cols;
+ for (i = oldlen; i < cols; i++)
+ line[i + 1] = ERASE_CHAR;
+ line[cols + 1] = lineattrs & LATTR_MODE;
+ }
+
+ return line;
+}
+
+/*
* Retrieve a line of the screen or of the scrollback, according to
* whether the y coordinate is non-negative or negative
* (respectively).
*/
unsigned long *lineptr(int y, int lineno)
{
- unsigned long *line, lineattrs;
+ unsigned long *line, *newline;
tree234 *whichtree;
- int i, treeindex, oldlen;
+ int treeindex;
if (y >= 0) {
whichtree = screen;
/* We assume that we don't screw up and retrieve something out of range. */
assert(line != NULL);
- if (line[0] != cols) {
- /*
- * This line is the wrong length, which probably means it
- * hasn't been accessed since a resize. Resize it now.
- */
- oldlen = line[0];
- lineattrs = line[oldlen + 1];
+ newline = resizeline(line, cols);
+ if (newline != line) {
delpos234(whichtree, treeindex);
- line = srealloc(line, TSIZE * (2 + cols));
- line[0] = cols;
- for (i = oldlen; i < cols; i++)
- line[i + 1] = ERASE_CHAR;
- line[cols + 1] = lineattrs & LATTR_MODE;
- addpos234(whichtree, line, treeindex);
+ addpos234(whichtree, newline, treeindex);
}
return line + 1;
if (lines < 0) {
while (lines < 0) {
line = delpos234(screen, botline);
+ line = resizeline(line, cols);
for (i = 0; i < cols; i++)
line[i + 1] = erase_char;
line[cols + 1] = 0;
addpos234(scrollback, line, sblen);
line = line2;
}
+ line = resizeline(line, cols);
for (i = 0; i < cols; i++)
line[i + 1] = erase_char;
line[cols + 1] = 0;