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; Improve commentary in insdel.c

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* src/insdel.c (gap_left, gap_right, make_gap_larger)
(make_gap_smaller): Improve commentary.
This commit is contained in:
Eli Zaretskii 2016-02-13 17:48:38 +02:00
parent 53ca1e1acf
commit 47896c8446
1 changed files with 14 additions and 4 deletions
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18
src/insdel.c
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@ -126,7 +126,10 @@ gap_left (ptrdiff_t charpos, ptrdiff_t bytepos, bool newgap)
if (i == 0) if (i == 0)
break; break;
/* If a quit is requested, stop copying now. /* If a quit is requested, stop copying now.
Change BYTEPOS to be where we have actually moved the gap to. */ Change BYTEPOS to be where we have actually moved the gap to.
Note that this cannot happen when we are called to make the
gap larger or smaller, since make_gap_larger and
make_gap_smaller prevent QUIT by setting inhibit-quit. */
if (QUITP) if (QUITP)
{ {
bytepos = new_s1; bytepos = new_s1;
@ -179,7 +182,10 @@ gap_right (ptrdiff_t charpos, ptrdiff_t bytepos)
if (i == 0) if (i == 0)
break; break;
/* If a quit is requested, stop copying now. /* If a quit is requested, stop copying now.
Change BYTEPOS to be where we have actually moved the gap to. */ Change BYTEPOS to be where we have actually moved the gap to.
Note that this cannot happen when we are called to make the
gap larger or smaller, since make_gap_larger and
make_gap_smaller prevent QUIT by setting inhibit-quit. */
if (QUITP) if (QUITP)
{ {
bytepos = new_s1; bytepos = new_s1;
@ -386,7 +392,9 @@ make_gap_larger (ptrdiff_t nbytes_added)
enlarge_buffer_text (current_buffer, nbytes_added); enlarge_buffer_text (current_buffer, nbytes_added);
/* Prevent quitting in move_gap. */ /* Prevent quitting in gap_left. We cannot allow a QUIT there,
because that would leave the buffer text in an inconsistent
state, with 2 gap holes instead of just one. */
tem = Vinhibit_quit; tem = Vinhibit_quit;
Vinhibit_quit = Qt; Vinhibit_quit = Qt;
@ -432,7 +440,9 @@ make_gap_smaller (ptrdiff_t nbytes_removed)
if (GAP_SIZE - nbytes_removed < GAP_BYTES_MIN) if (GAP_SIZE - nbytes_removed < GAP_BYTES_MIN)
nbytes_removed = GAP_SIZE - GAP_BYTES_MIN; nbytes_removed = GAP_SIZE - GAP_BYTES_MIN;
/* Prevent quitting in move_gap. */ /* Prevent quitting in gap_right. We cannot allow a QUIT there,
because that would leave the buffer text in an inconsistent
state, with 2 gap holes instead of just one. */
tem = Vinhibit_quit; tem = Vinhibit_quit;
Vinhibit_quit = Qt; Vinhibit_quit = Qt;