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Fix combining sequence iterators for forward and backward movement.

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This commit is contained in:
Andrei Zmievski 2006-07-10 20:14:12 +00:00
parent 743deb09c9
commit 8dd4e2692c
1 changed files with 82 additions and 51 deletions
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133
ext/unicode/unicode_iterators.c
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@ -306,6 +306,59 @@ static text_iter_ops text_iter_cp_ops = {
/* Combining sequence ops */
static void text_iter_helper_move(zend_bool forward, UChar *text, int32_t text_len, int32_t *offset, int32_t *cp_offset)
{
UChar32 cp;
int32_t tmp, tmp2;
if (*offset == UBRK_DONE) {
return;
}
if (forward) {
if (*offset == text_len) {
*offset = UBRK_DONE;
*cp_offset = UBRK_DONE;
} else {
U16_NEXT(text, (*offset), text_len, cp);
(*cp_offset)++;
if (u_getCombiningClass(cp) == 0) {
tmp = *offset;
tmp2 = *cp_offset;
/*
* At the end of the string cp will be 0 because of the NULL
* terminating NULL, so combining class will be 0 as well.
*/
while (tmp < text_len) {
U16_NEXT(text, tmp, text_len, cp);
tmp2++;
if (u_getCombiningClass(cp) == 0) {
break;
} else {
*offset = tmp;
*cp_offset = tmp2;
}
}
}
}
} else {
if (*offset == 0) {
*offset = UBRK_DONE;
*cp_offset = UBRK_DONE;
} else {
U16_PREV(text, 0, (*offset), cp);
(*cp_offset)--;
if (u_getCombiningClass(cp) != 0) {
do {
U16_PREV(text, 0, (*offset), cp);
(*cp_offset)--;
} while (*offset > 0 && u_getCombiningClass(cp) != 0);
}
}
}
}
static int text_iter_cs_valid(text_iter_obj* object, long flags TSRMLS_DC)
{
return (object->u.cs.start != UBRK_DONE);
@ -313,25 +366,41 @@ static int text_iter_cs_valid(text_iter_obj* object, long flags TSRMLS_DC)
static void text_iter_cs_current(text_iter_obj* object, long flags TSRMLS_DC)
{
uint32_t length;
UChar *start;
int32_t length = -1;
if (object->u.cs.start == UBRK_DONE || object->u.cs.end == UBRK_DONE) {
length = 0;
} else {
if (object->u.cs.start != UBRK_DONE) {
if (flags & ITER_REVERSE) {
if (object->u.cs.end == object->u.cs.start) {
text_iter_helper_move(0, object->text, object->text_len,
&object->u.cs.start, &object->u.cs.start_cp_offset);
}
start = object->text + object->u.cs.end;
} else {
if (object->u.cs.end == object->u.cs.start) {
text_iter_helper_move(1, object->text, object->text_len,
&object->u.cs.end, &object->u.cs.end_cp_offset);
}
start = object->text + object->u.cs.start;
}
length = abs(object->u.cs.end - object->u.cs.start);
if (object->u.cs.end == UBRK_DONE) {
length = 0;
} else {
length = abs(object->u.cs.end - object->u.cs.start);
}
} else {
length = 0;
}
if (length != 0) {
if (length+1 > object->current_alloc) {
object->current_alloc = length+1;
Z_USTRVAL_P(object->current) = eurealloc(Z_USTRVAL_P(object->current), object->current_alloc);
}
u_memcpy(Z_USTRVAL_P(object->current), start, length);
}
Z_USTRVAL_P(object->current)[length] = 0;
Z_USTRLEN_P(object->current) = length;
}
@ -343,60 +412,23 @@ static int text_iter_cs_key(text_iter_obj* object, long flags TSRMLS_DC)
static int text_iter_cs_offset(text_iter_obj* object, long flags TSRMLS_DC)
{
if (flags & ITER_REVERSE) {
return object->u.cs.end_cp_offset;
} else {
return object->u.cs.start_cp_offset;
}
return object->u.cs.start_cp_offset;
}
static void text_iter_cs_next(text_iter_obj* object, long flags TSRMLS_DC)
{
UChar32 cp;
int32_t tmp, tmp2;
if (object->u.cs.start == UBRK_DONE) {
return;
}
object->u.cs.start = object->u.cs.end;
object->u.cs.start_cp_offset = object->u.cs.end_cp_offset;
if (flags & ITER_REVERSE) {
if (object->u.cs.end == 0) {
object->u.cs.end = UBRK_DONE;
object->u.cs.end_cp_offset = UBRK_DONE;
} else {
U16_PREV(object->text, 0, object->u.cs.end, cp);
object->u.cs.end_cp_offset--;
if (u_getCombiningClass(cp) != 0) {
do {
U16_PREV(object->text, 0, object->u.cs.end, cp);
object->u.cs.end_cp_offset--;
} while (object->u.cs.end > 0 && u_getCombiningClass(cp) != 0);
}
}
text_iter_helper_move(0, object->text, object->text_len,
&object->u.cs.start, &object->u.cs.start_cp_offset);
object->u.cs.end = object->u.cs.start;
} else {
if (object->u.cs.end == object->text_len) {
object->u.cs.end = UBRK_DONE;
object->u.cs.end_cp_offset = UBRK_DONE;
} else {
U16_NEXT(object->text, object->u.cs.end, object->text_len, cp);
object->u.cs.end_cp_offset++;
if (u_getCombiningClass(cp) == 0) {
tmp = object->u.cs.end;
tmp2 = object->u.cs.end_cp_offset;
while (tmp < object->text_len) {
U16_NEXT(object->text, tmp, object->text_len, cp);
tmp2++;
if (u_getCombiningClass(cp) == 0) {
break;
} else {
object->u.cs.end = tmp;
object->u.cs.end_cp_offset = tmp2;
}
}
}
}
text_iter_helper_move(1, object->text, object->text_len,
&object->u.cs.start, &object->u.cs.start_cp_offset);
object->u.cs.end = object->u.cs.start;
}
object->u.cs.index++;
}
@ -411,7 +443,6 @@ static void text_iter_cs_rewind(text_iter_obj *object, long flags TSRMLS_DC)
object->u.cs.start = object->u.cs.end = 0;
object->u.cs.start_cp_offset = object->u.cs.end_cp_offset = 0;
}
text_iter_cs_next(object, flags TSRMLS_CC); /* find first sequence */
object->u.cs.index = 0; /* because _next increments index */
}