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
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
|
/*@z43.c:Language Service:LanguageChange, LanguageString@*********************/
/* */
/* THE LOUT DOCUMENT FORMATTING SYSTEM (VERSION 3.20) */
/* COPYRIGHT (C) 1991, 2000 Jeffrey H. Kingston */
/* */
/* Jeffrey H. Kingston (jeff@cs.usyd.edu.au) */
/* Basser Department of Computer Science */
/* The University of Sydney 2006 */
/* AUSTRALIA */
/* */
/* 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, 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 */
/* */
/* FILE: z43.c */
/* MODULE: Language Service */
/* EXTERNS: LanguageInit(), LanguageDefine(), LanguageChange(), */
/* LanguageString(), LanguageHyph() */
/* */
/*****************************************************************************/
#include "externs.h"
#define INIT_LANGUAGE_NUM 100
/*****************************************************************************/
/* */
/* LANGUAGE_TABLE */
/* */
/* A symbol table permitting access to language name records. */
/* The table will automatically enlarge to accept any number of entries. */
/* */
/* ltab_new(newsize) New empty table, newsize capacity */
/* ltab_insert(x, &S) Insert new language name object x into S */
/* ltab_retrieve(str, S) Retrieve language name object named str */
/* ltab_debug(S, fp) Debug print of table S to file fp */
/* */
/*****************************************************************************/
typedef struct
{ int langtab_size; /* size of table */
int langtab_count; /* number of objects held */
OBJECT langtab_item[1];
} *LANGUAGE_TABLE;
#define ltab_size(S) (S)->langtab_size
#define ltab_count(S) (S)->langtab_count
#define ltab_item(S, i) (S)->langtab_item[i]
#define hash(pos, str, S) \
{ FULL_CHAR *p = str; \
pos = *p++; \
while( *p ) pos += *p++; \
pos = pos % ltab_size(S); \
}
static LANGUAGE_TABLE ltab_new(int newsize)
{ LANGUAGE_TABLE S; int i;
ifdebug(DMA, D, DebugRegisterUsage(MEM_LANG_TAB, 1,
2*sizeof(int) + newsize * sizeof(OBJECT)));
S = (LANGUAGE_TABLE)
malloc(2*sizeof(int) + newsize * sizeof(OBJECT));
if( S == (LANGUAGE_TABLE) NULL )
Error(43, 1, "run out of memory enlarging language table", FATAL, no_fpos);
ltab_size(S) = newsize;
ltab_count(S) = 0;
for( i = 0; i < newsize; i++ ) ltab_item(S, i) = nilobj;
return S;
} /* end ltab_new */
static void ltab_insert(OBJECT x, LANGUAGE_TABLE *S);
static LANGUAGE_TABLE ltab_rehash(LANGUAGE_TABLE S, int newsize)
{ LANGUAGE_TABLE NewS; int i;
NewS = ltab_new(newsize);
for( i = 1; i <= ltab_size(S); i++ )
{ if( ltab_item(S, i) != nilobj )
ltab_insert(ltab_item(S, i), &NewS);
}
free(S);
return NewS;
} /* end ltab_rehash */
static void ltab_insert(OBJECT x, LANGUAGE_TABLE *S)
{ int pos; OBJECT z, link, y;
if( ltab_count(*S) == ltab_size(*S) - 1 ) /* one less since 0 unused */
*S = ltab_rehash(*S, 2*ltab_size(*S));
hash(pos, string(x), *S);
if( ltab_item(*S, pos) == nilobj ) New(ltab_item(*S, pos), ACAT);
z = ltab_item(*S, pos);
for( link = Down(z); link != z; link = NextDown(link) )
{ Child(y, link);
if( StringEqual(string(x), string(y)) )
{ Error(43, 2, "language name %s used twice (first at%s)",
FATAL, &fpos(x), string(x), EchoFilePos(&fpos(y)));
}
}
Link(ltab_item(*S, pos), x);
} /* end ltab_insert */
static OBJECT ltab_retrieve(FULL_CHAR *str, LANGUAGE_TABLE S)
{ OBJECT x, link, y; int pos;
hash(pos, str, S);
x = ltab_item(S, pos);
if( x == nilobj ) return nilobj;
for( link = Down(x); link != x; link = NextDown(link) )
{ Child(y, link);
if( StringEqual(str, string(y)) ) return y;
}
return nilobj;
} /* end ltab_retrieve */
#if DEBUG_ON
static void ltab_debug(LANGUAGE_TABLE S, FILE *fp)
{ int i; OBJECT x, link, y;
fprintf(fp, " table size: %d; current number of keys: %d\n",
ltab_size(S), ltab_count(S));
for( i = 0; i < ltab_size(S); i++ )
{ x = ltab_item(S, i);
fprintf(fp, "ltab_item(S, %d) =", i);
if( x == nilobj )
fprintf(fp, " <nilobj>");
else if( type(x) != ACAT )
fprintf(fp, " not ACAT!");
else for( link = Down(x); link != x; link = NextDown(link) )
{ Child(y, link);
fprintf(fp, " %s",
is_word(type(y)) ? string(y) : AsciiToFull("not-WORD!"));
}
fprintf(fp, "\n");
}
} /* end ltab_debug */
#endif
static LANGUAGE_TABLE names_tab; /* the language names */
static OBJECT *hyph_tab; /* arry of hyph filenames */
static OBJECT *canonical_tab; /* array of lang names */
static int lang_tabsize; /* size of prev two arrays */
static int lang_count; /* number of languages */
static OBJECT lang_ends[MAX_LANGUAGE];/* sentence endings */
/*@@**************************************************************************/
/* */
/* BOOLEAN LanguageSentenceEnds[] */
/* */
/* LanguageSentenceEnds[ch] is TRUE if there exists a language in which */
/* character ch could occur at the end of a sentence. */
/* */
/*****************************************************************************/
BOOLEAN LanguageSentenceEnds[MAX_CHARS];
/*@::LanguageInit(), LanguageDefine()@****************************************/
/* */
/* LanguageInit() */
/* */
/* Initialize this module. */
/* */
/*****************************************************************************/
void LanguageInit(void)
{ int i;
debug0(DLS, D, "LanguageInit()");
names_tab = ltab_new(INIT_LANGUAGE_NUM);
lang_count = 0;
lang_tabsize = INIT_LANGUAGE_NUM;
ifdebug(DMA, D, DebugRegisterUsage(MEM_LANG_TAB, 0,
INIT_LANGUAGE_NUM * sizeof(OBJECT)));
hyph_tab = (OBJECT *) malloc(INIT_LANGUAGE_NUM * sizeof(OBJECT));
ifdebug(DMA, D, DebugRegisterUsage(MEM_LANG_TAB, 0,
INIT_LANGUAGE_NUM * sizeof(OBJECT)));
canonical_tab = (OBJECT *) malloc(INIT_LANGUAGE_NUM * sizeof(OBJECT));
for( i = 0; i < MAX_CHARS; i++ ) LanguageSentenceEnds[i] = FALSE;
debug0(DLS, D, "LanguageInit returning.");
} /* end LanguageInit */
/*****************************************************************************/
/* */
/* LanguageDefine(names, inside) */
/* */
/* Define a language whose names are given by ACAT of words names, and */
/* whose associated hyphenation patterns file name is hyph_file. */
/* */
/*****************************************************************************/
void LanguageDefine(OBJECT names, OBJECT inside)
{ OBJECT link, y, hyph_file; BOOLEAN junk; FULL_CHAR ch;
int len;
assert( names != nilobj && type(names) == ACAT, "LanguageDefine: names!");
assert( Down(names) != names, "LanguageDefine: names is empty!");
debug2(DLS, D, "LanguageDefine(%s, %s)",
EchoObject(names), EchoObject(inside));
/* double table size if overflow */
if( ++lang_count >= lang_tabsize )
{
ifdebug(DMA, D, DebugRegisterUsage(MEM_LANG_TAB, 0,
-lang_tabsize * sizeof(OBJECT)));
ifdebug(DMA, D, DebugRegisterUsage(MEM_LANG_TAB, 0,
-lang_tabsize * sizeof(OBJECT)));
lang_tabsize *= 2;
ifdebug(DMA, D, DebugRegisterUsage(MEM_LANG_TAB, 0,
lang_tabsize * sizeof(OBJECT)));
ifdebug(DMA, D, DebugRegisterUsage(MEM_LANG_TAB, 0,
lang_tabsize * sizeof(OBJECT)));
hyph_tab = (OBJECT *) realloc(hyph_tab, lang_tabsize * sizeof(OBJECT) );
canonical_tab = (OBJECT *) realloc(canonical_tab, lang_tabsize * sizeof(OBJECT) );
}
/* insert each language name into names_tab */
for( link = Down(names); link != names; link = NextDown(link) )
{ Child(y, link);
assert( is_word(type(y)), "LanguageDefine: type(y) != WORD!" );
word_language(y) = lang_count;
ltab_insert(y, &names_tab);
}
/* initialize canonical language name entry */
Child(y, Down(names));
canonical_tab[lang_count] = y;
/* make inside an ACAT if it isn't already */
if( type(inside) != ACAT )
{ New(y, ACAT);
FposCopy(fpos(y), fpos(inside));
Link(y, inside);
inside = y;
}
/* initialize hyphenation file entry (first child of inside) */
Child(hyph_file, Down(inside));
DeleteLink(Down(inside));
if( !is_word(type(hyph_file)) )
Error(43, 3, "hyphenation file name expected here",
FATAL, &fpos(inside));
if( StringEqual(string(hyph_file), STR_EMPTY) ||
StringEqual(string(hyph_file), STR_HYPHEN) )
{ Dispose(hyph_file);
hyph_tab[lang_count] = nilobj;
}
else hyph_tab[lang_count] = hyph_file;
/* initialize sentence ends */
lang_ends[lang_count] = inside;
for( link = Down(inside); link != inside; link = NextDown(link) )
{ Child(y, link);
if( type(y) == GAP_OBJ )
{ link = PrevDown(link);
DisposeChild(NextDown(link));
continue;
}
if( !is_word(type(y)) )
{ debug2(DLS, D, "word patterns failing on %s %s", Image(type(y)),
EchoObject(y));
Error(43, 4, "expected word ending pattern here", FATAL, &fpos(y));
}
len = StringLength(string(y));
if( len == 0 )
Error(43, 5, "empty word ending pattern", FATAL, &fpos(y));
ch = string(y)[len - 1];
LanguageSentenceEnds[ch] = TRUE;
}
/* if initializing run, initialize the hyphenation table */
if( InitializeAll )
{ if( hyph_tab[lang_count] != nilobj )
junk = ReadHyphTable(lang_count);
}
debug0(DLS, D, "LanguageDefine returning.");
} /* end LanguageDefine */
/*****************************************************************************/
/* */
/* BOOLEAN LanguageWordEndsSentence(OBJECT wd, BOOLEAN lc_prec) */
/* */
/* Returns TRUE if word ends a sentence in the current language. This is */
/* so if it ends with a string in the list associated with the current */
/* language. If lc_prec is TRUE, it is also necessary for the character */
/* preceding this suffix to be lower-case. */
/* */
/*****************************************************************************/
BOOLEAN LanguageWordEndsSentence(OBJECT wd, BOOLEAN lc_prec)
{ OBJECT x, y, link; int pos;
assert( is_word(type(wd)), "LanguageWordEndsSentence: wd!" );
debug2(DLS, D, "LanguageWordEndsSentence(%d %s)",
word_language(wd), EchoObject(wd));
x = lang_ends[word_language(wd)];
for( link = Down(x); link != x; link = NextDown(link) )
{ Child(y, link);
if( StringEndsWith(string(wd), string(y)) )
{
if( !lc_prec )
{ debug0(DLS, D, "LanguageWordEndsSentence returning TRUE (!lc_prec)");
return TRUE;
}
/* now check whether the preceding character is lower case */
pos = StringLength(string(wd)) - StringLength(string(y)) - 1;
if( pos >= 0 &&
MapIsLowerCase(string(wd)[pos], FontMapping(word_font(wd), &fpos(wd))))
{
debug0(DLS, D, "LanguageWordEndsSentence returning TRUE (!lc_prec)");
return TRUE;
}
}
}
debug0(DLS, D, "LanguageWordEndsSentence returning FALSE");
return FALSE;
} /* end LanguageWordEndsSentence */
/*@::LanguageChange(), LanguageString(), LanguageHyph()@**********************/
/* */
/* LanguageChange(style, x) */
/* */
/* Change the current style to contain the language of language command x. */
/* */
/*****************************************************************************/
void LanguageChange(STYLE *style, OBJECT x)
{ OBJECT lname;
debug2(DLS, D, "LanguageChange(%s, %s)", EchoStyle(style), EchoObject(x));
/* if argument is not a word, fail and exit */
if( !is_word(type(x)) )
{ Error(43, 6, "%s ignored (illegal left parameter)", WARN, &fpos(x),
KW_LANGUAGE);
debug0(DLS, D, "LanguageChange returning (language unchanged)");
return;
}
/* if argument is empty, return unchanged */
if( StringEqual(string(x), STR_EMPTY) )
{ debug0(DLS, D, "LanguageChange returning (empty, language unchanged)");
return;
}
/* retrieve language record if present, else leave style unchanged */
lname = ltab_retrieve(string(x), names_tab);
if( lname == nilobj )
Error(43, 7, "%s ignored (unknown language %s)", WARN, &fpos(x),
KW_LANGUAGE, string(x));
else language(*style) = word_language(lname);
debug1(DLS, D, "LanguageChange returning (language = %s)", string(lname));
ifdebug(DLS, DD, ltab_debug(names_tab, stderr));
} /* LanguageChange */
/*****************************************************************************/
/* */
/* FULL_CHAR *LanguageString(lnum) */
/* */
/* Return the canonical name of language lnum. */
/* */
/*****************************************************************************/
FULL_CHAR *LanguageString(LANGUAGE_NUM lnum)
{ FULL_CHAR *res;
debug1(DLS, D, "LanguageString(%d)", lnum);
assert( lnum > 0 && lnum <= lang_count, "LanguageString: unknown number" );
res = string(canonical_tab[lnum]);
debug1(DLS, D, "LanguageString returning %s", res);
return res;
} /* end LanguageString */
/*****************************************************************************/
/* */
/* OBJECT LanguageHyph(lnum) */
/* */
/* Return the hyphenation file name object for language lnum. */
/* */
/*****************************************************************************/
OBJECT LanguageHyph(LANGUAGE_NUM lnum)
{ OBJECT res;
debug1(DLS, D, "LanguageHyph(%d)", lnum);
assert( lnum > 0 && lnum <= lang_count, "LanguageHyph: unknown number" );
res = hyph_tab[lnum];
debug1(DLS, D, "LanguageHyph returning %s", EchoObject(res));
return res;
} /* end LanguageHyph */
|
