procyberian/emacs
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Avoid duplicate comparison in describe_map_compare

Browse source 
* src/fns.c (string_version_cmp): New function.
This has most of the old Fstring_version_lessp,
with an assertion to make things a bit clearer.
* src/fns.c (Fstring_version_lessp):
* src/keymap.c (describe_map_compare): Use it (Bug#33237).
This commit is contained in:
Paul Eggert 2019-07-11 17:01:20 -07:00
parent ef6715364d
commit 77a4cc9f1a
3 changed files with 17 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

20
src/fns.c
View file

@ -403,7 +403,14 @@ Symbols are also allowed; their print names are used instead. */)
string2 = SYMBOL_NAME (string2);
CHECK_STRING (string1);
CHECK_STRING (string2);
return string_version_cmp (string1, string2) < 0 ? Qt : Qnil;
}
/* Return negative, 0, positive if STRING1 is <, =, > STRING2 as per
string-version-lessp. */
int
string_version_cmp (Lisp_Object string1, Lisp_Object string2)
{
char *p1 = SSDATA (string1);
char *p2 = SSDATA (string2);
char *lim1 = p1 + SBYTES (string1);
@ -415,15 +422,18 @@ Symbols are also allowed; their print names are used instead. */)
/* If the strings are identical through their first NUL bytes,
skip past identical prefixes and try again. */
ptrdiff_t size = strlen (p1) + 1;
eassert (size == strlen (p2) + 1);
p1 += size;
p2 += size;
if (lim1 < p1)
return lim2 < p2 ? Qnil : Qt;
if (lim2 < p2)
return Qnil;
bool more1 = p1 <= lim1;
bool more2 = p2 <= lim2;
if (!more1)
return more2;
if (!more2)
return -1;
}
return cmp < 0 ? Qt : Qnil;
return cmp;
}
DEFUN ("string-collate-lessp", Fstring_collate_lessp, Sstring_collate_lessp, 2, 4, 0,

4
src/keymap.c
View file

@ -3100,9 +3100,7 @@ describe_map_compare (const void *aa, const void *bb)
if (SYMBOLP (a->event) && SYMBOLP (b->event))
/* Sort the keystroke names in the "natural" way, with (for
instance) "<f2>" coming between "<f1>" and "<f11>". */
return (!NILP (Fstring_version_lessp (a->event, b->event)) ? -1
: !NILP (Fstring_version_lessp (b->event, a->event)) ? 1
: 0);
return string_version_cmp (SYMBOL_NAME (a->event), SYMBOL_NAME (b->event));
return 0;
}

1
src/lisp.h
View file

@ -3595,6 +3595,7 @@ extern Lisp_Object substring_both (Lisp_Object, ptrdiff_t, ptrdiff_t,
ptrdiff_t, ptrdiff_t);
extern Lisp_Object merge (Lisp_Object, Lisp_Object, Lisp_Object);
extern Lisp_Object do_yes_or_no_p (Lisp_Object);
extern int string_version_cmp (Lisp_Object, Lisp_Object);
extern Lisp_Object concat2 (Lisp_Object, Lisp_Object);
extern Lisp_Object concat3 (Lisp_Object, Lisp_Object, Lisp_Object);
extern bool equal_no_quit (Lisp_Object, Lisp_Object);