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vi: speed up some string ops
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parent
528a8b9769
commit
f882f08627
98
editors/vi.c
98
editors/vi.c
@ -1162,9 +1162,9 @@ static void Hit_Return(void)
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{
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char c;
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standout_start(); // start reverse video
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standout_start();
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write1("[Hit return to continue]");
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standout_end(); // end reverse video
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standout_end();
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while ((c = get_one_char()) != '\n' && c != '\r')
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continue;
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redraw(TRUE); // force redraw all
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@ -1179,16 +1179,13 @@ static int next_tabstop(int col)
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static void sync_cursor(char *d, int *row, int *col)
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{
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char *beg_cur; // begin and end of "d" line
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char *end_scr; // begin and end of screen
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char *tp;
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int cnt, ro, co;
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beg_cur = begin_line(d); // first char of cur line
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end_scr = end_screen(); // last char of screen
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if (beg_cur < screenbegin) {
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// "d" is before top line on screen
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// "d" is before top line on screen
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// how many lines do we have to move
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cnt = count_lines(beg_cur, screenbegin);
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sc1:
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@ -1199,18 +1196,22 @@ static void sync_cursor(char *d, int *row, int *col)
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screenbegin = prev_line(screenbegin);
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}
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}
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} else if (beg_cur > end_scr) {
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// "d" is after bottom line on screen
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// how many lines do we have to move
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cnt = count_lines(end_scr, beg_cur);
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if (cnt > (rows - 1) / 2)
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goto sc1; // too many lines
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for (ro = 0; ro < cnt - 1; ro++) {
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// move screen begin the same amount
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screenbegin = next_line(screenbegin);
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// now, move the end of screen
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end_scr = next_line(end_scr);
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end_scr = end_line(end_scr);
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} else {
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char *end_scr; // begin and end of screen
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end_scr = end_screen(); // last char of screen
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if (beg_cur > end_scr) {
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// "d" is after bottom line on screen
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// how many lines do we have to move
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cnt = count_lines(end_scr, beg_cur);
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if (cnt > (rows - 1) / 2)
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goto sc1; // too many lines
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for (ro = 0; ro < cnt - 1; ro++) {
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// move screen begin the same amount
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screenbegin = next_line(screenbegin);
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// now, move the end of screen
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end_scr = next_line(end_scr);
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end_scr = end_line(end_scr);
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}
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}
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}
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// "d" is on screen- find out which row
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@ -1271,31 +1272,37 @@ static void sync_cursor(char *d, int *row, int *col)
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}
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//----- Text Movement Routines ---------------------------------
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static char *begin_line(char * p) // return pointer to first char cur line
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static char *begin_line(char *p) // return pointer to first char cur line
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{
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while (p > text && p[-1] != '\n')
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p--; // go to cur line B-o-l
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if (p > text) {
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p = memrchr(text, '\n', p - text);
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if (!p)
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return text;
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return p + 1;
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}
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return p;
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}
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static char *end_line(char * p) // return pointer to NL of cur line line
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static char *end_line(char *p) // return pointer to NL of cur line line
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{
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while (p < end - 1 && *p != '\n')
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p++; // go to cur line E-o-l
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if (p < end - 1) {
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p = memchr(p, '\n', end - p - 1);
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if (!p)
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return end - 1;
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}
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return p;
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}
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static char *dollar_line(char * p) // return pointer to just before NL line
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static char *dollar_line(char *p) // return pointer to just before NL line
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{
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while (p < end - 1 && *p != '\n')
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p++; // go to cur line E-o-l
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p = end_line(p);
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// Try to stay off of the Newline
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if (*p == '\n' && (p - begin_line(p)) > 0)
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p--;
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return p;
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}
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static char *prev_line(char * p) // return pointer first char prev line
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static char *prev_line(char *p) // return pointer first char prev line
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{
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p = begin_line(p); // goto begining of cur line
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if (p[-1] == '\n' && p > text)
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@ -1304,7 +1311,7 @@ static char *prev_line(char * p) // return pointer first char prev line
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return p;
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}
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static char *next_line(char * p) // return pointer first char next line
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static char *next_line(char *p) // return pointer first char next line
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{
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p = end_line(p);
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if (*p == '\n' && p < end - 1)
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@ -1326,21 +1333,24 @@ static char *end_screen(void)
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return q;
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}
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static int count_lines(char * start, char * stop) // count line from start to stop
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// count line from start to stop
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static int count_lines(char *start, char *stop)
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{
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char *q;
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int cnt;
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if (stop < start) { // start and stop are backwards- reverse them
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if (stop < start) { // start and stop are backwards- reverse them
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q = start;
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start = stop;
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stop = q;
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}
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cnt = 0;
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stop = end_line(stop); // get to end of this line
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for (q = start; q <= stop && q <= end - 1; q++) {
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if (*q == '\n')
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stop = end_line(stop);
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while (start <= stop && start <= end - 1) {
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start = end_line(start);
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if (*start == '\n')
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cnt++;
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start++;
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}
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return cnt;
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}
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@ -1415,11 +1425,11 @@ static void dot_scroll(int cnt, int dir)
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for (; cnt > 0; cnt--) {
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if (dir < 0) {
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// scroll Backwards
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// ctrl-Y scroll up one line
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// ctrl-Y scroll up one line
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screenbegin = prev_line(screenbegin);
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} else {
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// scroll Forwards
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// ctrl-E scroll down one line
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// ctrl-E scroll down one line
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screenbegin = next_line(screenbegin);
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}
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}
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@ -1444,7 +1454,7 @@ static void dot_delete(void) // delete the char at 'dot'
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text_hole_delete(dot, dot);
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}
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static char *bound_dot(char * p) // make sure text[0] <= P < "end"
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static char *bound_dot(char *p) // make sure text[0] <= P < "end"
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{
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if (p >= end && end > text) {
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p = end - 1;
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@ -1808,7 +1818,7 @@ static char *find_pair(char * p, const char c)
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#if ENABLE_FEATURE_VI_SETOPTS
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// show the matching char of a pair, () [] {}
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static void showmatching(char * p)
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static void showmatching(char *p)
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{
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char *q, *save_dot;
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@ -2057,7 +2067,7 @@ static void check_context(char cmd)
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}
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}
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static char *swap_context(char * p) // goto new context for '' command make this the current context
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static char *swap_context(char *p) // goto new context for '' command make this the current context
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{
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char *tmp;
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@ -2837,12 +2847,16 @@ static void refresh(int full_screen)
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// compare text[] to screen[] and mark screen[] lines that need updating
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for (li = 0; li < rows - 1; li++) {
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int cs, ce; // column start & end
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char *out_buf;
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// format current text line
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char *out_buf = format_line(tp, li);
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out_buf = format_line(tp, li);
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// skip to the end of the current text[] line
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while (tp < end && *tp++ != '\n')
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continue;
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if (tp < end) {
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char *t = memchr(tp, '\n', end - tp);
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if (!t) t = end - 1;
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tp = t + 1;
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}
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// see if there are any changes between vitual screen and out_buf
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changed = FALSE; // assume no change
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