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Fix buffer copy_rows logic.

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This commit is contained in:
Michael Jumper 2013-05-03 11:49:08 -07:00
parent 3a32e7084c
commit 857498fc19
1 changed files with 13 additions and 17 deletions
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30
protocols/ssh/src/buffer.c
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@ -159,38 +159,34 @@ void guac_terminal_buffer_copy_columns(guac_terminal_buffer* buffer, int row,
void guac_terminal_buffer_copy_rows(guac_terminal_buffer* buffer,
int start_row, int end_row, int offset) {
int row;
int i, current_row;
int step;
/* If shifting down, copy in reverse */
if (offset > 0) {
/* Swap start/end */
int temp = end_row;
end_row = start_row;
start_row = temp;
/* Iterate backwards */
current_row = end_row;
step = -1;
}
/* Otherwise, copy forwards */
else
else {
current_row = start_row;
step = 1;
}
/* Copy each row individually */
for (row = start_row; row <= end_row; row += step) {
guac_terminal_buffer_row* src_row;
guac_terminal_buffer_row* dst_row;
/* Copy each current_row individually */
for (i = start_row; i <= end_row; i++) {
/* Get source and destination rows */
src_row = guac_terminal_buffer_get_row(buffer, row, 0);
dst_row = guac_terminal_buffer_get_row(buffer, row + offset, src_row->length);
guac_terminal_buffer_row* src_row = guac_terminal_buffer_get_row(buffer, current_row, 0);
guac_terminal_buffer_row* dst_row = guac_terminal_buffer_get_row(buffer, current_row + offset, src_row->length);
/* Copy data */
memcpy(dst_row->characters, src_row->characters, sizeof(guac_terminal_char) * src_row->length);
dst_row->length = src_row->length;
/* Next current_row */
current_row += step;
}