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Fix undo

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Avoid incorrect values in the number of undo elements and restore lastln
value after an undo operation.
This commit is contained in:
Roberto E. Vargas Caballero 2018-03-04 20:16:06 +01:00 committed by sin
parent cd9b149c8f
commit ece6569297
1 changed files with 17 additions and 4 deletions
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21
ed.c
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@ -35,7 +35,7 @@ struct hline {
};
struct undo {
int curln;
int curln, lastln;
size_t nr, cap;
struct link {
int to1, from1;
@ -51,7 +51,7 @@ static String lastre;
static int optverbose, optprompt, exstatus, optdiag = 1;
static int marks['z' - 'a'];
static int nlines, line1, line2;
static int curln, lastln, ocurln;
static int curln, lastln, ocurln, olastln;
static jmp_buf savesp;
static char *lasterr;
static size_t idxsize, lastidx;
@ -266,13 +266,14 @@ clearundo(void)
}
static void
relink(int to1, int from1, int from2, int to2)
newundo(int from1, int from2)
{
struct link *p;
if (newcmd) {
clearundo();
udata.curln = ocurln;
udata.lastln = olastln;
}
if (udata.nr >= udata.cap) {
size_t siz = (udata.cap + 10) * sizeof(struct link);
@ -286,7 +287,16 @@ relink(int to1, int from1, int from2, int to2)
p->to1 = zero[from1].next;
p->from2 = from2;
p->to2 = zero[from2].prev;
}
/*
* relink: to1 <- from1
* from2 -> to2
*/
static void
relink(int to1, int from1, int from2, int to2)
{
newundo(from1, from2);
zero[from1].next = to1;
zero[from2].prev = to2;
modflag = 1;
@ -299,7 +309,8 @@ undo(void)
if (udata.nr == 0)
return;
for (p = &udata.vec[udata.nr-1]; udata.nr--; --p) {
for (p = &udata.vec[udata.nr-1]; udata.nr > 0; --p) {
--udata.nr;
zero[p->from1].next = p->to1;
zero[p->from2].prev = p->to2;
}
@ -307,6 +318,7 @@ undo(void)
udata.vec = NULL;
udata.cap = 0;
curln = udata.curln;
lastln = udata.lastln;
}
static void
@ -1395,6 +1407,7 @@ edit(void)
for (;;) {
newcmd = 1;
ocurln = curln;
olastln = lastln;
cmdline.siz = 0;
repidx = -1;
if (optprompt) {