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#include <stdlib.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h> /* For snprintf() */
#include <inttypes.h>
#include <errno.h>
#include "libucd_int.h"
#include "gen/ucstoname_hash.h"
#ifdef HAVE_PTHREAD_H
# include <pthread.h>
#endif
/*
* This returns the name for a specific UCS in a user-provided buffer,
* and returns the total length regardless of overrun, like snprintf().
* This is used with names that *are* found in the hash table only.
*/
static void
libucd_mkname(char *buf, const unsigned char *nameslist_ptr)
{
const unsigned char *p = nameslist_ptr;
char *q = buf;
const char *pp;
char cc;
int n = *p++; /* Characters remaining */
while ( n ) {
pp = _libucd_nameslist_dict[*p++];
while ( (cc = *pp++) ) {
*q++ = cc;
if ( --n == 0 )
break;
}
}
*q = '\0';
}
/*
* Take a character in the range of the Hangul characters, and compute
* its formal name. Returns the length, or 0 if invalid.
*/
static size_t
hangul_name(char *buf, size_t n, int32_t codepoint)
{
/* See the Unicode Standard, version 4.1, section 3.12 */
const int32_t SBase = 0xAC00;
const int32_t LCount = 19;
const int32_t VCount = 21;
const int32_t TCount = 28;
const int32_t NCount = VCount * TCount; /* 588 */
const int32_t SCount = NCount * LCount; /* 11172 */
int32_t SIndex, L, V, T;
SIndex = codepoint - SBase;
if ( SIndex < 0 || SIndex >= SCount )
return 0;
L = SIndex/NCount;
V = (SIndex % NCount)/TCount;
T = SIndex % TCount;
return snprintf(buf, n, "HANGUL SYLLABLE %s%s%s",
_libucd_hangul_jamo_l[L],
_libucd_hangul_jamo_v[V],
_libucd_hangul_jamo_t[T]);
}
/*
* Binary search of the properties array (for non-hashed characters)
*/
static const struct _libucd_property_array *
search_prop_array(int32_t ucs)
{
int l, h, m;
const struct _libucd_property_array *pa;
l = 0;
h = _libucd_property_array_count-1;
for (;;) {
m = (l+h) >> 1;
pa = &_libucd_property_array[m];
if ( ucs >= pa[0].ucs ) {
if ( ucs < pa[1].ucs )
return pa;
else
l = m+1;
} else {
h = m-1;
}
}
}
/*
* Allocate memory and copy properties
*/
static struct unicode_character_data *
alloc_copy_properties(const struct _libucd_property_array *prop,
int32_t ucs, size_t namelen)
{
struct unicode_character_data *ucd;
struct libucd_private *pvt;
size_t size = sizeof(struct unicode_character_data)+
sizeof(struct libucd_private)+namelen+1;
ucd = malloc(size);
if ( !ucd )
return NULL;
pvt = (struct libucd_private *)(ucd+1);
ucd->name = (char *)(pvt+1);
ucd->size = sizeof(struct unicode_character_data);
ucd->alloc_size = size;
ucd->fl = prop->flags_block & UINT64_C(0xffffffffffff);
ucd->bidi_mirroring_glyph = NULL; /* NYS */
ucd->uppercase_mapping = NULL; /* NYS */
ucd->lowercase_mapping = NULL; /* NYS */
ucd->titlecase_mapping = NULL; /* NYS */
ucd->ucs = ucs;
ucd->simple_uppercase = ucs + getint24(prop->simple_uppercase);
ucd->simple_lowercase = ucs + getint24(prop->simple_lowercase);
ucd->simple_titlecase = ucs + getint24(prop->simple_titlecase);
ucd->numeric_value_num = prop->numeric_value_num;
if ( prop->numeric_value_den_exp & 0x80 ) {
ucd->numeric_value_exp = prop->numeric_value_den_exp & 0x7f;
ucd->numeric_value_den = 1;
} else {
ucd->numeric_value_exp = 1;
ucd->numeric_value_den = prop->numeric_value_den_exp;
}
ucd->age_ma = prop->age >> 3;
ucd->age_mi = prop->age & 7;
ucd->general_category = prop->general_category;
ucd->block = (prop->flags_block >> 48) & 0xff;
ucd->script = prop->script;
ucd->joining_type = prop->joining_type;
ucd->joining_group = prop->joining_group;
ucd->east_asian_width = prop->east_asian_width;
ucd->hangul_syllable_type = prop->hangul_syllable_type;
ucd->numeric_type = prop->numeric_type;
ucd->canonical_combining_class = prop->canonical_combining_class;
ucd->bidi_class = prop->bidi_class;
ucd->grapheme_cluster_break = prop->grapheme_cluster_break;
ucd->sentence_break = prop->sentence_break;
ucd->word_break = prop->word_break;
ucd->line_break = prop->line_break;
#if defined(HAVE_PTHREAD_H) && !defined(HAVE_ATOMIC_CTR)
if ( pthread_mutex_init(&pvt->mutex, NULL) ) {
free(ucd);
return NULL;
}
#endif
pvt->usage_ctr = 2; /* cache plus end user */
return ucd;
}
/*
* Actual data-generating function. ucs is required to be
* in the valid range [0..UCS_MAX].
*/
const struct unicode_character_data *
_libucd_character_data_raw(int32_t ucs)
{
uint32_t hash;
const struct _libucd_ucstoname_tab *unt;
const struct _libucd_property_array *prop;
size_t namelen;
struct unicode_character_data *ucd;
hash = _libucd_ucstoname_hash(ucs);
if ( hash >= PHASHNKEYS ) {
unt = NULL;
} else {
unt = &_libucd_ucstoname_tab[hash];
if ( getint24(unt->ucs) != ucs )
unt = NULL;
}
if ( unt ) {
const unsigned char *nameptr =
&_libucd_names_list[getuint24(unt->names_offset)];
prop = &_libucd_property_array[unt->proparray_offset];
namelen = *nameptr;
ucd = alloc_copy_properties(prop, ucs, namelen);
if ( !ucd )
return NULL;
libucd_mkname((char *)ucd->name, nameptr);
} else {
prop = search_prop_array(ucs);
if ( ucs >= 0xAC00 && ucs < 0xAC00+19*21*28 ) {
namelen = hangul_name(NULL, 0, ucs);
ucd = alloc_copy_properties(prop, ucs, namelen);
if ( !ucd )
return NULL;
hangul_name((char *)ucd->name, namelen+1, ucs);
} else if ( prop->flags_block & UC_FL_UNIFIED_IDEOGRAPH ) {
/* "CJK UNIFIED IDEOGRAPH-XXXX[X] */
namelen = (ucs > 0xffff) ? 27 : 26;
ucd = alloc_copy_properties(prop, ucs, namelen);
if ( !ucd )
return NULL;
snprintf((char *)ucd->name, namelen+1, "CJK UNIFIED IDEOGRAPH-%04X", ucs);
} else {
/* Unnamed character */
namelen = -1;
ucd = alloc_copy_properties(prop, ucs, namelen);
if ( !ucd )
return NULL;
ucd->name = NULL;
}
}
return ucd;
}
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