summaryrefslogtreecommitdiff
path: root/Build/source/texk/dvipdfm-x/otl_opt.c
blob: b0e2796536eece01886eab0e741f63af3fbdb3f1 (plain)
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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.

    Copyright (C) 2002-2020 by Jin-Hwan Cho and Shunsaku Hirata,
    the dvipdfmx project team.
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
    
    This program 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, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "system.h"
#include "error.h"
#include "mem.h"
#include "mfileio.h"

#include "otl_opt.h"

struct bt_node {
  int    flag;

  struct bt_node *left;
  struct bt_node *right;

  char data[4];
};

#define FLAG_NOT (1 << 0)
#define FLAG_AND (1 << 1)

static int match_expr (struct bt_node *expr, const char *key);
static int
match_expr (struct bt_node *expr, const char *key)
{
  int retval = 1;
  int i;

  if (expr) {
    if (!expr->left && !expr->right) {
      for (i = 0; i < 4; i++) {
	if (expr->data[i] != '?' &&
	    expr->data[i] != key[i]) {
	  retval = 0;
	  break;
	}
      }
    } else {
      if (expr->left) {
	retval  = match_expr(expr->left, key);
      }
      if (expr->right) {
	if (retval && (expr->flag & FLAG_AND)) /* and */
	  retval &= match_expr(expr->right, key);
	else if (!retval && !(expr->flag & FLAG_AND)) /* or */
	  retval  = match_expr(expr->right, key);
      }
    }
    if (expr->flag & FLAG_NOT) /* not */
      retval = retval ? 0 : 1;

  }

  return retval;
}

static struct bt_node *
bt_new_tree (void)
{
  struct bt_node *expr;

  expr = NEW(1, struct bt_node);
  expr->flag  = 0;
  expr->left  = NULL;
  expr->right = NULL;
  memset(expr->data, 0, 4);

  return expr;
}

static void bt_release_tree (struct bt_node *tree);

static void
bt_release_tree (struct bt_node *tree)
{
  if (tree) {
    if (tree->left)
      bt_release_tree(tree->left);
    if (tree->right)
      bt_release_tree(tree->right);
    RELEASE(tree);
  }
}

static struct bt_node *
parse_expr (const char **pp, const char *endptr)
{
  struct bt_node *root, *curr;
  
  if (*pp >= endptr)
    return NULL;

  root = curr = bt_new_tree();
  while (*pp < endptr) {
    switch (**pp) {
    case '!':
      if (curr->flag & 2)
        curr->flag &= ~FLAG_NOT;
      else
        curr->flag |=  FLAG_NOT;
      (*pp)++;
      break;
    case '(':
      (*pp)++;
      if (*pp < endptr) {
        struct bt_node *expr;

        expr = parse_expr(pp, endptr);
        if (!expr) {
            WARN("Syntax error: %s\n", *pp);
            return NULL;
        }
        if (**pp != ')') {
            WARN("Syntax error: Unbalanced ()\n");
            return NULL;
           }
        curr->left  = expr->left;
        curr->right = expr->right;
        memcpy(curr->data, expr->data, 4);

        RELEASE(expr);
      } else {
        WARN("Syntax error: Unbalanced ()\n");
        bt_release_tree(root);
        return NULL;
      }
      (*pp)++;
      break;
    case ')':
      return root;
    case '|': case '&':
      if (*pp >= endptr) {
        WARN("Syntax error: %s\n", *pp);
        bt_release_tree(root);
        return NULL;
      } else {
        struct bt_node *tmp;

        tmp        = bt_new_tree();
        tmp->left  = root;
        tmp->right = curr = bt_new_tree();
        if (**pp == '&')
          tmp->flag = 1;
        else
          tmp->flag = 0;
        root = tmp;
      }
      (*pp)++;
      break;
    case '*':
      memset(curr->data, '?', 4);
      (*pp)++;
      break;
    default:
      if (*pp + 4 <= endptr) {
        int i;

        for (i = 0; i < 4; i++) {
            if (**pp == ' '   || **pp == '?' ||
                isalpha((unsigned char)**pp) || isdigit((unsigned char)**pp))
                curr->data[i] = **pp;
            else if (**pp == '_')
                curr->data[i] = ' ';
            else {
                WARN("Invalid char in tag: %c\n", **pp);
                bt_release_tree(root);
                return NULL;
            }
            (*pp)++;
        }
      } else {
        WARN("Syntax error: %s\n", *pp);
        bt_release_tree(root);
        return NULL;
      }
      break;
    }
  }

  return root;
}


struct otl_opt
{
  struct bt_node *rule;
};

otl_opt *
otl_new_opt (void)
{
  struct otl_opt *opt;

  opt = NEW(1, struct otl_opt);
  opt->rule = NULL;

  return (otl_opt *) opt;
}


void
otl_release_opt (otl_opt *opt)
{
  if (opt->rule) {
    bt_release_tree(opt->rule);
  }
  opt->rule = NULL;
  RELEASE(opt);
}

#if 0
struct lv_range
{
  int start, end;
};

struct uc_coverage
{
  int    count;
  struct lv_range *ranges;
};

static inline int
range_cmp (const void *v1, const void *v2)
{
  struct lv_range *sv1, *sv2;

  sv1 = (struct lv_range *) v1;
  sv2 = (struct lv_range *) v2;

  if (sv1->start < sv2->start)
    return -1;
  else
    return  1;

  return 0;
}

static inline int
range_overlap (const void *v1, const void *v2)
{
  struct lv_range *sv1, *sv2;

  sv1 = (struct lv_range *) v1;
  sv2 = (struct lv_range *) v2;

  /* Must be first sort in increasing start order */
  if (sv1->end  >= sv2->start)
    return 0;
  else if (sv1->end < sv2->start)
    return -1;

  return 1;
}

static void
check_uc_coverage (struct uc_coverage *coverage)
{
  struct lv_range *r1, *r2;
  int i;

  for (i = 0; i < coverage->count; i++) {
    r1 = &coverage->ranges[i];
    r2 = bsearch(r1, coverage->ranges,
                 coverage->count, sizeof(struct lv_range),
                 range_overlap);
    if (r2 && r1 != r2) {
      WARN("Overlapping Unicode range found:");
      WARN("[%x-%x], [%x-%x] ==> [%x-%x]",
           r1->start, r1->end, r2->start, r2->end,
	   MIN(r1->start, r2->start), MAX(r1->end, r2->end));
      r2->start = MIN(r1->start, r2->start);
      r2->end   = MAX(r1->end  , r2->end  );
      if (i < coverage->count - 1) {
        memmove(&coverage->ranges[i], &coverage->ranges[i+1],
                (coverage->count - i - 1) * sizeof(struct lv_range));
        coverage->count -= 1;
      }
    }
  }
  /* ... */
  if (coverage->count == 0) {
    RELEASE(coverage->ranges);
    coverage->ranges = NULL;
  }
}
#endif

int
otl_parse_optstring (otl_opt *opt, const char *optstr)
{
  const char *p, *endptr;

  ASSERT(opt);

  if (optstr) {
    p      = optstr;
    endptr = p + strlen(optstr);
    opt->rule = parse_expr(&p, endptr);
  }

  return 0;
}

int
otl_match_optrule (otl_opt *opt, const char *tag)
{
  ASSERT(tag);

  if (!opt || !opt->rule)
    return 1;

  return match_expr(opt->rule, tag);
}