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Use internal bsearch() for language tags 

Fixes https://github.com/harfbuzz/harfbuzz/pull/1639
This commit is contained in:
Behdad Esfahbod 2019-03-28 21:00:58 -07:00
parent 21bb80ebf2
commit d2db71fdc4
1 changed files with 22 additions and 24 deletions
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46
src/hb-ot-tag.cc
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@ -171,24 +171,6 @@ hb_ot_tag_to_script (hb_tag_t tag)
/* hb_language_t */
static int
lang_compare_first_component (const void *pa,
const void *pb)
{
const char *a = (const char *) pa;
const char *b = (const char *) pb;
unsigned int da, db;
const char *p;
p = strchr (a, '-');
da = p ? (unsigned int) (p - a) : strlen (a);
p = strchr (b, '-');
db = p ? (unsigned int) (p - b) : strlen (b);
return strncmp (a, b, MAX (da, db));
}
static bool
subtag_matches (const char *lang_str,
const char *limit,
@ -213,10 +195,28 @@ lang_matches (const char *lang_str, const char *spec)
(lang_str[len] == '\0' || lang_str[len] == '-');
}
typedef struct {
struct LangTag
{
char language[4];
hb_tag_t tags[HB_OT_MAX_TAGS_PER_LANGUAGE];
} LangTag;
int cmp (const char *a) const
{
const char *b = this->language;
unsigned int da, db;
const char *p;
p = strchr (a, '-');
da = p ? (unsigned int) (p - a) : strlen (a);
p = strchr (b, '-');
db = p ? (unsigned int) (p - b) : strlen (b);
return strncmp (a, b, MAX (da, db));
}
int cmp (const LangTag *that) const
{ return cmp (that->language); }
};
#include "hb-ot-tag-table.hh"
@ -263,9 +263,7 @@ hb_ot_tags_from_language (const char *lang_str,
ISALPHA (s[1]))
lang_str = s + 1;
}
lang_tag = (LangTag *) bsearch (lang_str, ot_languages,
ARRAY_LENGTH (ot_languages), sizeof (LangTag),
lang_compare_first_component);
lang_tag = hb_sorted_array (ot_languages).bsearch (lang_str);
if (lang_tag)
{
unsigned int i;
@ -507,7 +505,7 @@ test_langs_sorted ()
{
for (unsigned int i = 1; i < ARRAY_LENGTH (ot_languages); i++)
{
int c = lang_compare_first_component (ot_languages[i-1].language, ot_languages[i].language);
int c = ot_languages[i].cmp (&ot_languages[i - 1]);
if (c >= 0)
{
fprintf (stderr, "ot_languages not sorted at index %d: %s %d %s\n",