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/*
Copyright 2004-2014 Han The Thanh, <thanh@pdftex.org>
This file is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This file is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ptexlib.h"
#include "avl.h"
static struct avl_table *PdfObjTree[pdfobjtypemax + 1] =
{ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
/**********************************************************************/
/* memory management functions for AVL */
static void *avl_xmalloc(struct libavl_allocator *allocator, size_t size)
{
assert(allocator != NULL && size > 0);
return xmalloc(size);
}
static void avl_xfree(struct libavl_allocator *allocator, void *block)
{
assert(allocator != NULL && block != NULL);
xfree(block);
}
struct libavl_allocator avl_xallocator = {
avl_xmalloc,
avl_xfree
};
/**********************************************************************/
/* general AVL comparison functions */
int comp_int_entry(const void *pa, const void *pb, void *p)
{
cmp_return(*(const int *) pa, *(const int *) pb);
return 0;
}
int comp_string_entry(const void *pa, const void *pb, void *p)
{
return strcmp((const char *) pa, (const char *) pb);
}
/**********************************************************************/
/* One AVL tree for each obj_type 0...pdfobjtypemax */
typedef struct oentry_ {
integer int0;
integer objptr;
} oentry;
/* AVL sort oentry into avl_table[] */
static int compare_info(const void *pa, const void *pb, void *param)
{
integer a, b;
int as, ae, bs, be, al, bl;
a = ((const oentry *) pa)->int0;
b = ((const oentry *) pb)->int0;
if (a < 0 && b < 0) { /* string comparison */
as = strstart[-a];
ae = strstart[-a + 1]; /* start of next string in pool */
bs = strstart[-b];
be = strstart[-b + 1];
al = ae - as;
bl = be - bs;
if (al < bl) /* compare first by string length */
return -1;
if (al > bl)
return 1;
for (; as < ae; as++, bs++) {
if (strpool[as] < strpool[bs])
return -1;
if (strpool[as] > strpool[bs])
return 1;
}
} else { /* integer comparison */
if (a < b)
return -1;
if (a > b)
return 1;
}
return 0;
}
void avlputobj(integer objptr, integer t)
{
static void **pp;
static oentry *oe;
if (PdfObjTree[t] == NULL) {
PdfObjTree[t] = avl_create(compare_info, NULL, &avl_xallocator);
if (PdfObjTree[t] == NULL)
pdftex_fail("avlstuff.c: avl_create() PdfObjTree failed");
}
oe = xtalloc(1, oentry);
oe->int0 = objtab[objptr].int0;
oe->objptr = objptr; /* allows to relocate objtab */
pp = avl_probe(PdfObjTree[t], oe);
if (pp == NULL)
pdftex_fail("avlstuff.c: avl_probe() out of memory in insertion");
}
/* replacement for linear search pascal function "find_obj()" */
integer avlfindobj(integer t, integer i, integer byname)
{
static oentry *p;
static oentry tmp;
if (byname > 0)
tmp.int0 = -i;
else
tmp.int0 = i;
if (PdfObjTree[t] == NULL)
return 0;
p = (oentry *) avl_find(PdfObjTree[t], &tmp);
if (p == NULL)
return 0;
return p->objptr;
}
/**********************************************************************/
struct avl_table *mf_tree = NULL;
typedef struct {
char *tfm_name;
internalfontnumber fontnum;
} mf_entry;
/**********************************************************************/
/* cleaning up... */
#if 0 /* unused */
static void destroy_oentry(void *pa, void *pb)
{
oentry *p = (oentry *) pa;
xfree(p);
}
static void PdfObjTree_free(void)
{
int i;
for (i = 0; i <= pdfobjtypemax; i++) {
if (PdfObjTree[i] != NULL)
avl_destroy(PdfObjTree[i], destroy_oentry);
}
}
#endif
/**********************************************************************/
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