1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
Copyright (c) 2004-2007 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 pdfTeX; if not, write to the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
$Id$
*/
#include "ptexlib.h"
#include <kpathsea/c-vararg.h>
#include <kpathsea/c-proto.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 */
void *avl_xmalloc(struct libavl_allocator *allocator, size_t size)
{
assert(allocator != NULL && size > 0);
return xmalloc(size);
}
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[] */
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... */
static void destroy_oentry(void *pa, void *pb)
{
oentry *p = (oentry *) pa;
xfree(p);
}
void PdfObjTree_free()
{
int i;
for (i = 0; i <= pdfobjtypemax; i++) {
if (PdfObjTree[i] != NULL)
avl_destroy(PdfObjTree[i], destroy_oentry);
}
}
/**********************************************************************/
|
