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comparison: gfx/harfbuzz/src/hb-buffer-serialize.cc

gfx/harfbuzz/src/hb-buffer-serialize.cc

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TOR_BUG_9701
changeset 14
925c144e1f1f
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-1:000000000000 0:525dc06a9e43
1 /*
2 * Copyright © 2012,2013 Google, Inc.
3 *
4 * This is part of HarfBuzz, a text shaping library.
5 *
6 * Permission is hereby granted, without written agreement and without
7 * license or royalty fees, to use, copy, modify, and distribute this
8 * software and its documentation for any purpose, provided that the
9 * above copyright notice and the following two paragraphs appear in
10 * all copies of this software.
11 *
12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
16 * DAMAGE.
17 *
18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
23 *
24 * Google Author(s): Behdad Esfahbod
25 */
26
27 #include "hb-buffer-private.hh"
28
29
30 static const char *serialize_formats[] = {
31 "text",
32 "json",
33 NULL
34 };
35
36 /**
37 * hb_buffer_serialize_list_formats:
38 *
39 *
40 *
41 * Return value: (transfer none):
42 *
43 * Since: 1.0
44 **/
45 const char **
46 hb_buffer_serialize_list_formats (void)
47 {
48 return serialize_formats;
49 }
50
51 /**
52 * hb_buffer_serialize_format_from_string:
53 * @str:
54 * @len:
55 *
56 *
57 *
58 * Return value:
59 *
60 * Since: 1.0
61 **/
62 hb_buffer_serialize_format_t
63 hb_buffer_serialize_format_from_string (const char *str, int len)
64 {
65 /* Upper-case it. */
66 return (hb_buffer_serialize_format_t) (hb_tag_from_string (str, len) & ~0x20202020);
67 }
68
69 /**
70 * hb_buffer_serialize_format_to_string:
71 * @format:
72 *
73 *
74 *
75 * Return value:
76 *
77 * Since: 1.0
78 **/
79 const char *
80 hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format)
81 {
82 switch (format)
83 {
84 case HB_BUFFER_SERIALIZE_FORMAT_TEXT: return serialize_formats[0];
85 case HB_BUFFER_SERIALIZE_FORMAT_JSON: return serialize_formats[1];
86 default:
87 case HB_BUFFER_SERIALIZE_FORMAT_INVALID: return NULL;
88 }
89 }
90
91 static unsigned int
92 _hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
93 unsigned int start,
94 unsigned int end,
95 char *buf,
96 unsigned int buf_size,
97 unsigned int *buf_consumed,
98 hb_font_t *font,
99 hb_buffer_serialize_flags_t flags)
100 {
101 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);
102 hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, NULL);
103
104 *buf_consumed = 0;
105 for (unsigned int i = start; i < end; i++)
106 {
107 char b[1024];
108 char *p = b;
109
110 /* In the following code, we know b is large enough that no overflow can happen. */
111
112 #define APPEND(s) HB_STMT_START { strcpy (p, s); p += strlen (s); } HB_STMT_END
113
114 if (i)
115 *p++ = ',';
116
117 *p++ = '{';
118
119 APPEND ("\"g\":");
120 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
121 {
122 char g[128];
123 hb_font_glyph_to_string (font, info[i].codepoint, g, sizeof (g));
124 *p++ = '"';
125 for (char *q = g; *q; q++) {
126 if (*q == '"')
127 *p++ = '\\';
128 *p++ = *q;
129 }
130 *p++ = '"';
131 }
132 else
133 p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
134
135 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
136 p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
137 }
138
139 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
140 {
141 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"dx\":%d,\"dy\":%d",
142 pos[i].x_offset, pos[i].y_offset);
143 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"ax\":%d,\"ay\":%d",
144 pos[i].x_advance, pos[i].y_advance);
145 }
146
147 *p++ = '}';
148
149 unsigned int l = p - b;
150 if (buf_size > l)
151 {
152 memcpy (buf, b, l);
153 buf += l;
154 buf_size -= l;
155 *buf_consumed += l;
156 *buf = '\0';
157 } else
158 return i - start;
159 }
160
161 return end - start;
162 }
163
164 static unsigned int
165 _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
166 unsigned int start,
167 unsigned int end,
168 char *buf,
169 unsigned int buf_size,
170 unsigned int *buf_consumed,
171 hb_font_t *font,
172 hb_buffer_serialize_flags_t flags)
173 {
174 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);
175 hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, NULL);
176
177 *buf_consumed = 0;
178 for (unsigned int i = start; i < end; i++)
179 {
180 char b[1024];
181 char *p = b;
182
183 /* In the following code, we know b is large enough that no overflow can happen. */
184
185 if (i)
186 *p++ = '|';
187
188 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
189 {
190 hb_font_glyph_to_string (font, info[i].codepoint, p, 128);
191 p += strlen (p);
192 }
193 else
194 p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
195
196 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
197 p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
198 }
199
200 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
201 {
202 if (pos[i].x_offset || pos[i].y_offset)
203 p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", pos[i].x_offset, pos[i].y_offset));
204
205 *p++ = '+';
206 p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance));
207 if (pos[i].y_advance)
208 p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",%d", pos[i].y_advance));
209 }
210
211 unsigned int l = p - b;
212 if (buf_size > l)
213 {
214 memcpy (buf, b, l);
215 buf += l;
216 buf_size -= l;
217 *buf_consumed += l;
218 *buf = '\0';
219 } else
220 return i - start;
221 }
222
223 return end - start;
224 }
225
226 /* Returns number of items, starting at start, that were serialized. */
227 /**
228 * hb_buffer_serialize_glyphs:
229 * @buffer: a buffer.
230 * @start:
231 * @end:
232 * @buf: (array length=buf_size):
233 * @buf_size:
234 * @buf_consumed: (out):
235 * @font:
236 * @format:
237 * @flags:
238 *
239 *
240 *
241 * Return value:
242 *
243 * Since: 1.0
244 **/
245 unsigned int
246 hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
247 unsigned int start,
248 unsigned int end,
249 char *buf,
250 unsigned int buf_size,
251 unsigned int *buf_consumed, /* May be NULL */
252 hb_font_t *font, /* May be NULL */
253 hb_buffer_serialize_format_t format,
254 hb_buffer_serialize_flags_t flags)
255 {
256 assert (start <= end && end <= buffer->len);
257
258 unsigned int sconsumed;
259 if (!buf_consumed)
260 buf_consumed = &sconsumed;
261 *buf_consumed = 0;
262
263 assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
264 buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
265
266 if (unlikely (start == end))
267 return 0;
268
269 if (!font)
270 font = hb_font_get_empty ();
271
272 switch (format)
273 {
274 case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
275 return _hb_buffer_serialize_glyphs_text (buffer, start, end,
276 buf, buf_size, buf_consumed,
277 font, flags);
278
279 case HB_BUFFER_SERIALIZE_FORMAT_JSON:
280 return _hb_buffer_serialize_glyphs_json (buffer, start, end,
281 buf, buf_size, buf_consumed,
282 font, flags);
283
284 default:
285 case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
286 return 0;
287
288 }
289 }
290
291
292 static hb_bool_t
293 parse_uint (const char *pp, const char *end, uint32_t *pv)
294 {
295 char buf[32];
296 unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp));
297 strncpy (buf, pp, len);
298 buf[len] = '\0';
299
300 char *p = buf;
301 char *pend = p;
302 uint32_t v;
303
304 errno = 0;
305 v = strtol (p, &pend, 10);
306 if (errno || p == pend || pend - p != end - pp)
307 return false;
308
309 *pv = v;
310 return true;
311 }
312
313 static hb_bool_t
314 parse_int (const char *pp, const char *end, int32_t *pv)
315 {
316 char buf[32];
317 unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp));
318 strncpy (buf, pp, len);
319 buf[len] = '\0';
320
321 char *p = buf;
322 char *pend = p;
323 int32_t v;
324
325 errno = 0;
326 v = strtol (p, &pend, 10);
327 if (errno || p == pend || pend - p != end - pp)
328 return false;
329
330 *pv = v;
331 return true;
332 }
333
334 #include "hb-buffer-deserialize-json.hh"
335 #include "hb-buffer-deserialize-text.hh"
336
337 /**
338 * hb_buffer_deserialize_glyphs:
339 * @buffer: a buffer.
340 * @buf: (array length=buf_len):
341 * @buf_len:
342 * @end_ptr: (out):
343 * @font:
344 * @format:
345 *
346 *
347 *
348 * Return value:
349 *
350 * Since: 1.0
351 **/
352 hb_bool_t
353 hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
354 const char *buf,
355 int buf_len, /* -1 means nul-terminated */
356 const char **end_ptr, /* May be NULL */
357 hb_font_t *font, /* May be NULL */
358 hb_buffer_serialize_format_t format)
359 {
360 const char *end;
361 if (!end_ptr)
362 end_ptr = &end;
363 *end_ptr = buf;
364
365 assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
366 buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
367
368 if (buf_len == -1)
369 buf_len = strlen (buf);
370
371 if (!buf_len)
372 {
373 *end_ptr = buf;
374 return false;
375 }
376
377 hb_buffer_set_content_type (buffer, HB_BUFFER_CONTENT_TYPE_GLYPHS);
378
379 if (!font)
380 font = hb_font_get_empty ();
381
382 switch (format)
383 {
384 case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
385 return _hb_buffer_deserialize_glyphs_text (buffer,
386 buf, buf_len, end_ptr,
387 font);
388
389 case HB_BUFFER_SERIALIZE_FORMAT_JSON:
390 return _hb_buffer_deserialize_glyphs_json (buffer,
391 buf, buf_len, end_ptr,
392 font);
393
394 default:
395 case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
396 return false;
397
398 }
399 }

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