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Please, apply patch for contrib/ltree to current CVS and 7.3.2

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CHANGES

Mar 28, 2003
    Added finctions index(ltree,ltree,offset), text2ltree(text),
                    ltree2text(text)

Teodor Sigaev
This commit is contained in:
Bruce Momjian
2003-03-31 20:53:45 +00:00
parent d307a954e7
commit baf6c8d21d
5 changed files with 300 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
contrib/ltree/ltree_op.c
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@ -19,10 +19,13 @@ PG_FUNCTION_INFO_V1(ltree_isparent);
PG_FUNCTION_INFO_V1(ltree_risparent);
PG_FUNCTION_INFO_V1(subltree);
PG_FUNCTION_INFO_V1(subpath);
PG_FUNCTION_INFO_V1(ltree_index);
PG_FUNCTION_INFO_V1(ltree_addltree);
PG_FUNCTION_INFO_V1(ltree_addtext);
PG_FUNCTION_INFO_V1(ltree_textadd);
PG_FUNCTION_INFO_V1(lca);
PG_FUNCTION_INFO_V1(ltree2text);
PG_FUNCTION_INFO_V1(text2ltree);
Datum ltree_cmp(PG_FUNCTION_ARGS);
Datum ltree_lt(PG_FUNCTION_ARGS);
Datum ltree_le(PG_FUNCTION_ARGS);
@ -33,10 +36,13 @@ Datum ltree_gt(PG_FUNCTION_ARGS);
Datum nlevel(PG_FUNCTION_ARGS);
Datum subltree(PG_FUNCTION_ARGS);
Datum subpath(PG_FUNCTION_ARGS);
Datum ltree_index(PG_FUNCTION_ARGS);
Datum ltree_addltree(PG_FUNCTION_ARGS);
Datum ltree_addtext(PG_FUNCTION_ARGS);
Datum ltree_textadd(PG_FUNCTION_ARGS);
Datum lca(PG_FUNCTION_ARGS);
Datum ltree2text(PG_FUNCTION_ARGS);
Datum text2ltree(PG_FUNCTION_ARGS);
int
ltree_compare(const ltree * a, const ltree * b)
@ -317,6 +323,57 @@ ltree_addtext(PG_FUNCTION_ARGS)
PG_RETURN_POINTER(r);
}
Datum
ltree_index(PG_FUNCTION_ARGS)
{
ltree *a = PG_GETARG_LTREE(0);
ltree *b = PG_GETARG_LTREE(1);
int start=(fcinfo->nargs == 3) ? PG_GETARG_INT32(2) : 0;
int i,j;
ltree_level *startptr, *aptr, *bptr;
bool found=false;
if ( start < 0 ) {
if ( -start >= a->numlevel )
start=0;
else
start = (int)(a->numlevel)+start;
}
if ( a->numlevel - start < b->numlevel || a->numlevel==0 || b->numlevel==0 ) {
PG_FREE_IF_COPY(a, 0);
PG_FREE_IF_COPY(b, 1);
PG_RETURN_INT32(-1);
}
startptr=LTREE_FIRST(a);
for(i=0; i<=a->numlevel-b->numlevel; i++) {
if ( i>=start ) {
aptr=startptr;
bptr=LTREE_FIRST(b);
for(j=0;j<b->numlevel;j++) {
if ( !(aptr->len==bptr->len && strncmp(aptr->name,bptr->name, aptr->len)==0) )
break;
aptr=LEVEL_NEXT(aptr);
bptr=LEVEL_NEXT(bptr);
}
if ( j==b->numlevel ) {
found=true;
break;
}
}
startptr=LEVEL_NEXT(startptr);
}
if ( !found )
i=-1;
PG_FREE_IF_COPY(a, 0);
PG_FREE_IF_COPY(b, 1);
PG_RETURN_INT32(i);
}
Datum
ltree_textadd(PG_FUNCTION_ARGS)
{
@ -431,3 +488,55 @@ lca(PG_FUNCTION_ARGS)
else
PG_RETURN_NULL();
}
Datum
text2ltree(PG_FUNCTION_ARGS)
{
text *in = PG_GETARG_TEXT_P(0);
char *s = (char *) palloc(VARSIZE(in) - VARHDRSZ + 1);
ltree *out;
memcpy(s, VARDATA(in), VARSIZE(in) - VARHDRSZ);
s[VARSIZE(in) - VARHDRSZ] = '\0';
out = (ltree *) DatumGetPointer(DirectFunctionCall1(
ltree_in,
PointerGetDatum(s)
));
pfree(s);
PG_FREE_IF_COPY(in,0);
PG_RETURN_POINTER(out);
}
Datum
ltree2text(PG_FUNCTION_ARGS)
{
ltree *in = PG_GETARG_LTREE(0);
char *ptr;
int i;
ltree_level *curlevel;
text *out;
out=(text*)palloc(in->len+VARHDRSZ);
ptr = VARDATA(out);
curlevel = LTREE_FIRST(in);
for (i = 0; i < in->numlevel; i++) {
if (i != 0) {
*ptr = '.';
ptr++;
}
memcpy(ptr, curlevel->name, curlevel->len);
ptr += curlevel->len;
curlevel = LEVEL_NEXT(curlevel);
}
VARATT_SIZEP(out) = VARHDRSZ + (ptr-VARDATA(out));
PG_FREE_IF_COPY(in, 0);
PG_RETURN_POINTER(out);
}