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Comment and whitespace tweaks.

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This commit is contained in:
Rob Landley 2008-10-19 04:21:21 +00:00
parent e3742f4217
commit 4bdeaaf556
1 changed files with 6 additions and 10 deletions
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16
editors/vi.c
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@ -2243,11 +2243,9 @@ static char readit(void) // read (maybe cursor) key from stdin
n = chars_to_parse; n = chars_to_parse;
if (n == 0) { if (n == 0) {
// If no data, block waiting for input. // If no data, block waiting for input. (If we read more than the
// Can't read more than minimal ESC sequence size - // minimal ESC sequence size, the "n=0" below would instead have to
// see "n = 0" below. Example of mishandled // figure out how much to keep, resulting in larger code.)
// sequence if we read 4 chars here: "ESC O A ESC O A".
// We'll read "ESC O A ESC" and lose second ESC!
n = safe_read(0, readbuffer, 3); n = safe_read(0, readbuffer, 3);
if (n <= 0) { if (n <= 0) {
error: error:
@ -2272,7 +2270,8 @@ static char readit(void) // read (maybe cursor) key from stdin
pfd.fd = STDIN_FILENO; pfd.fd = STDIN_FILENO;
pfd.events = POLLIN; pfd.events = POLLIN;
for (eindex = esccmds; eindex < esccmds + ARRAY_SIZE(esccmds); eindex++) { for (eindex = esccmds; eindex < esccmds + ARRAY_SIZE(esccmds); eindex++)
{
// n - position in sequence we did not read yet // n - position in sequence we did not read yet
int i = 0; // position in sequence to compare int i = 0; // position in sequence to compare
@ -2286,10 +2285,7 @@ static char readit(void) // read (maybe cursor) key from stdin
// Timeout is needed to reconnect escape sequences // Timeout is needed to reconnect escape sequences
// split up by transmission over a serial console. // split up by transmission over a serial console.
// Even though inter-char delay on 1200 baud is <10ms,
// process scheduling can enlarge it arbitrarily,
// on both send and receive sides.
// Erring on the safe side - 5 timer ticks on 100 HZ.
if (safe_poll(&pfd, 1, 50)) { if (safe_poll(&pfd, 1, 50)) {
if (safe_read(0, readbuffer + n, 1) <= 0) if (safe_read(0, readbuffer + n, 1) <= 0)
goto error; goto error;