OLD | NEW |
(Empty) | |
| 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 const char ** |
| 37 hb_buffer_serialize_list_formats (void) |
| 38 { |
| 39 return serialize_formats; |
| 40 } |
| 41 |
| 42 hb_buffer_serialize_format_t |
| 43 hb_buffer_serialize_format_from_string (const char *str, int len) |
| 44 { |
| 45 /* Upper-case it. */ |
| 46 return (hb_buffer_serialize_format_t) (hb_tag_from_string (str, len) & ~0x2020
2020); |
| 47 } |
| 48 |
| 49 const char * |
| 50 hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format) |
| 51 { |
| 52 switch (format) |
| 53 { |
| 54 case HB_BUFFER_SERIALIZE_FORMAT_TEXT: return serialize_formats[0]; |
| 55 case HB_BUFFER_SERIALIZE_FORMAT_JSON: return serialize_formats[1]; |
| 56 default: |
| 57 case HB_BUFFER_SERIALIZE_FORMAT_INVALID: return NULL; |
| 58 } |
| 59 } |
| 60 |
| 61 static unsigned int |
| 62 _hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer, |
| 63 unsigned int start, |
| 64 unsigned int end, |
| 65 char *buf, |
| 66 unsigned int buf_size, |
| 67 unsigned int *buf_consumed, |
| 68 hb_font_t *font, |
| 69 hb_buffer_serialize_flags_t flags) |
| 70 { |
| 71 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL); |
| 72 hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, NULL); |
| 73 |
| 74 *buf_consumed = 0; |
| 75 for (unsigned int i = start; i < end; i++) |
| 76 { |
| 77 char b[1024]; |
| 78 char *p = b; |
| 79 |
| 80 /* In the following code, we know b is large enough that no overflow can hap
pen. */ |
| 81 |
| 82 #define APPEND(s) HB_STMT_START { strcpy (p, s); p += strlen (s); } HB_STMT_END |
| 83 |
| 84 if (i) |
| 85 *p++ = ','; |
| 86 |
| 87 *p++ = '{'; |
| 88 |
| 89 APPEND ("\"g\":"); |
| 90 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES)) |
| 91 { |
| 92 char g[128]; |
| 93 hb_font_glyph_to_string (font, info[i].codepoint, g, sizeof (g)); |
| 94 *p++ = '"'; |
| 95 for (char *q = g; *q; q++) { |
| 96 if (*q == '"') |
| 97 *p++ = '\\'; |
| 98 *p++ = *q; |
| 99 } |
| 100 *p++ = '"'; |
| 101 } |
| 102 else |
| 103 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint); |
| 104 |
| 105 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) { |
| 106 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluste
r); |
| 107 } |
| 108 |
| 109 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS)) |
| 110 { |
| 111 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"dx\":%d,\"dy\":%d", |
| 112 pos[i].x_offset, pos[i].y_offset); |
| 113 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"ax\":%d,\"ay\":%d", |
| 114 pos[i].x_advance, pos[i].y_advance); |
| 115 } |
| 116 |
| 117 *p++ = '}'; |
| 118 |
| 119 if (buf_size > (p - b)) |
| 120 { |
| 121 unsigned int l = p - b; |
| 122 memcpy (buf, b, l); |
| 123 buf += l; |
| 124 buf_size -= l; |
| 125 *buf_consumed += l; |
| 126 *buf = '\0'; |
| 127 } else |
| 128 return i - start; |
| 129 } |
| 130 |
| 131 return end - start; |
| 132 } |
| 133 |
| 134 static unsigned int |
| 135 _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer, |
| 136 unsigned int start, |
| 137 unsigned int end, |
| 138 char *buf, |
| 139 unsigned int buf_size, |
| 140 unsigned int *buf_consumed, |
| 141 hb_font_t *font, |
| 142 hb_buffer_serialize_flags_t flags) |
| 143 { |
| 144 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL); |
| 145 hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, NULL); |
| 146 |
| 147 *buf_consumed = 0; |
| 148 for (unsigned int i = start; i < end; i++) |
| 149 { |
| 150 char b[1024]; |
| 151 char *p = b; |
| 152 |
| 153 /* In the following code, we know b is large enough that no overflow can hap
pen. */ |
| 154 |
| 155 if (i) |
| 156 *p++ = '|'; |
| 157 |
| 158 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES)) |
| 159 { |
| 160 hb_font_glyph_to_string (font, info[i].codepoint, p, 128); |
| 161 p += strlen (p); |
| 162 } |
| 163 else |
| 164 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint); |
| 165 |
| 166 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) { |
| 167 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster); |
| 168 } |
| 169 |
| 170 if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS)) |
| 171 { |
| 172 if (pos[i].x_offset || pos[i].y_offset) |
| 173 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", pos[i].x_offset,
pos[i].y_offset); |
| 174 |
| 175 *p++ = '+'; |
| 176 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance); |
| 177 if (pos->y_advance) |
| 178 p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",%d", pos[i].y_advance); |
| 179 } |
| 180 |
| 181 if (buf_size > (p - b)) |
| 182 { |
| 183 unsigned int l = p - b; |
| 184 memcpy (buf, b, l); |
| 185 buf += l; |
| 186 buf_size -= l; |
| 187 *buf_consumed += l; |
| 188 *buf = '\0'; |
| 189 } else |
| 190 return i - start; |
| 191 } |
| 192 |
| 193 return end - start; |
| 194 } |
| 195 |
| 196 /* Returns number of items, starting at start, that were serialized. */ |
| 197 unsigned int |
| 198 hb_buffer_serialize_glyphs (hb_buffer_t *buffer, |
| 199 unsigned int start, |
| 200 unsigned int end, |
| 201 char *buf, |
| 202 unsigned int buf_size, |
| 203 unsigned int *buf_consumed, /* May be NULL */ |
| 204 hb_font_t *font, /* May be NULL */ |
| 205 hb_buffer_serialize_format_t format, |
| 206 hb_buffer_serialize_flags_t flags) |
| 207 { |
| 208 assert (start <= end && end <= buffer->len); |
| 209 |
| 210 unsigned int sconsumed; |
| 211 if (!buf_consumed) |
| 212 buf_consumed = &sconsumed; |
| 213 *buf_consumed = 0; |
| 214 |
| 215 assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALI
D) || |
| 216 buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS); |
| 217 |
| 218 if (unlikely (start == end)) |
| 219 return 0; |
| 220 |
| 221 if (!font) |
| 222 font = hb_font_get_empty (); |
| 223 |
| 224 switch (format) |
| 225 { |
| 226 case HB_BUFFER_SERIALIZE_FORMAT_TEXT: |
| 227 return _hb_buffer_serialize_glyphs_text (buffer, start, end, |
| 228 buf, buf_size, buf_consumed, |
| 229 font, flags); |
| 230 |
| 231 case HB_BUFFER_SERIALIZE_FORMAT_JSON: |
| 232 return _hb_buffer_serialize_glyphs_json (buffer, start, end, |
| 233 buf, buf_size, buf_consumed, |
| 234 font, flags); |
| 235 |
| 236 default: |
| 237 case HB_BUFFER_SERIALIZE_FORMAT_INVALID: |
| 238 return 0; |
| 239 |
| 240 } |
| 241 } |
| 242 |
| 243 |
| 244 static hb_bool_t |
| 245 parse_uint (const char *pp, const char *end, uint32_t *pv) |
| 246 { |
| 247 char buf[32]; |
| 248 unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp)); |
| 249 strncpy (buf, pp, len); |
| 250 buf[len] = '\0'; |
| 251 |
| 252 char *p = buf; |
| 253 char *pend = p; |
| 254 uint32_t v; |
| 255 |
| 256 errno = 0; |
| 257 v = strtol (p, &pend, 10); |
| 258 if (errno || p == pend || pend - p != end - pp) |
| 259 return false; |
| 260 |
| 261 *pv = v; |
| 262 return true; |
| 263 } |
| 264 |
| 265 static hb_bool_t |
| 266 parse_int (const char *pp, const char *end, int32_t *pv) |
| 267 { |
| 268 char buf[32]; |
| 269 unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp)); |
| 270 strncpy (buf, pp, len); |
| 271 buf[len] = '\0'; |
| 272 |
| 273 char *p = buf; |
| 274 char *pend = p; |
| 275 int32_t v; |
| 276 |
| 277 errno = 0; |
| 278 v = strtol (p, &pend, 10); |
| 279 if (errno || p == pend || pend - p != end - pp) |
| 280 return false; |
| 281 |
| 282 *pv = v; |
| 283 return true; |
| 284 } |
| 285 |
| 286 #include "hb-buffer-deserialize-json.hh" |
| 287 #include "hb-buffer-deserialize-text.hh" |
| 288 |
| 289 hb_bool_t |
| 290 hb_buffer_deserialize_glyphs (hb_buffer_t *buffer, |
| 291 const char *buf, |
| 292 int buf_len, /* -1 means nul-terminated */ |
| 293 const char **end_ptr, /* May be NULL */ |
| 294 hb_font_t *font, /* May be NULL */ |
| 295 hb_buffer_serialize_format_t format) |
| 296 { |
| 297 const char *end; |
| 298 if (!end_ptr) |
| 299 end_ptr = &end; |
| 300 *end_ptr = buf; |
| 301 |
| 302 assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALI
D) || |
| 303 buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS); |
| 304 |
| 305 if (buf_len == -1) |
| 306 buf_len = strlen (buf); |
| 307 |
| 308 if (!buf_len) |
| 309 { |
| 310 *end_ptr = buf; |
| 311 return false; |
| 312 } |
| 313 |
| 314 hb_buffer_set_content_type (buffer, HB_BUFFER_CONTENT_TYPE_GLYPHS); |
| 315 |
| 316 if (!font) |
| 317 font = hb_font_get_empty (); |
| 318 |
| 319 switch (format) |
| 320 { |
| 321 case HB_BUFFER_SERIALIZE_FORMAT_TEXT: |
| 322 return _hb_buffer_deserialize_glyphs_text (buffer, |
| 323 buf, buf_len, end_ptr, |
| 324 font); |
| 325 |
| 326 case HB_BUFFER_SERIALIZE_FORMAT_JSON: |
| 327 return _hb_buffer_deserialize_glyphs_json (buffer, |
| 328 buf, buf_len, end_ptr, |
| 329 font); |
| 330 |
| 331 default: |
| 332 case HB_BUFFER_SERIALIZE_FORMAT_INVALID: |
| 333 return false; |
| 334 |
| 335 } |
| 336 } |
OLD | NEW |