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comparison: gfx/harfbuzz/src/hb-buffer-deserialize-text.rl
gfx/harfbuzz/src/hb-buffer-deserialize-text.rl
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:05cdf0e9a237 |
|---|---|
| 1 /* | |
| 2 * Copyright © 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 #ifndef HB_BUFFER_DESERIALIZE_TEXT_HH | |
| 28 #define HB_BUFFER_DESERIALIZE_TEXT_HH | |
| 29 | |
| 30 #include "hb-private.hh" | |
| 31 | |
| 32 %%{ | |
| 33 | |
| 34 machine deserialize_text; | |
| 35 alphtype unsigned char; | |
| 36 write data; | |
| 37 | |
| 38 action clear_item { | |
| 39 memset (&info, 0, sizeof (info)); | |
| 40 memset (&pos , 0, sizeof (pos )); | |
| 41 } | |
| 42 | |
| 43 action add_item { | |
| 44 buffer->add_info (info); | |
| 45 if (buffer->in_error) | |
| 46 return false; | |
| 47 buffer->pos[buffer->len - 1] = pos; | |
| 48 *end_ptr = p; | |
| 49 } | |
| 50 | |
| 51 action tok { | |
| 52 tok = p; | |
| 53 } | |
| 54 | |
| 55 action parse_glyph { | |
| 56 if (!hb_font_glyph_from_string (font, | |
| 57 tok, p - tok, | |
| 58 &info.codepoint)) | |
| 59 return false; | |
| 60 } | |
| 61 | |
| 62 action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; } | |
| 63 action parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; } | |
| 64 action parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; } | |
| 65 action parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; } | |
| 66 action parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; } | |
| 67 | |
| 68 unum = '0' | [1-9] digit*; | |
| 69 num = '-'? unum; | |
| 70 | |
| 71 glyph_id = unum; | |
| 72 glyph_name = alpha (alnum|'_'|'.'|'-')*; | |
| 73 | |
| 74 glyph = (glyph_id | glyph_name) >tok %parse_glyph; | |
| 75 cluster = '=' (unum >tok %parse_cluster); | |
| 76 offsets = '@' (num >tok %parse_x_offset) ',' (num >tok %parse_y_offset ); | |
| 77 advances= '+' (num >tok %parse_x_advance) (',' (num >tok %parse_y_advance))?; | |
| 78 item = | |
| 79 ( | |
| 80 glyph | |
| 81 cluster? | |
| 82 offsets? | |
| 83 advances? | |
| 84 ) | |
| 85 >clear_item | |
| 86 %add_item | |
| 87 ; | |
| 88 | |
| 89 main := space* item (space* '|' space* item)* space* ('|'|']')?; | |
| 90 | |
| 91 }%% | |
| 92 | |
| 93 static hb_bool_t | |
| 94 _hb_buffer_deserialize_glyphs_text (hb_buffer_t *buffer, | |
| 95 const char *buf, | |
| 96 unsigned int buf_len, | |
| 97 const char **end_ptr, | |
| 98 hb_font_t *font) | |
| 99 { | |
| 100 const char *p = buf, *pe = buf + buf_len; | |
| 101 | |
| 102 /* Ensure we have positions. */ | |
| 103 (void) hb_buffer_get_glyph_positions (buffer, NULL); | |
| 104 | |
| 105 while (p < pe && ISSPACE (*p)) | |
| 106 p++; | |
| 107 if (p < pe && *p == (buffer->len ? '|' : '[')) | |
| 108 { | |
| 109 *end_ptr = ++p; | |
| 110 } | |
| 111 | |
| 112 const char *eof = pe, *tok = NULL; | |
| 113 int cs; | |
| 114 hb_glyph_info_t info; | |
| 115 hb_glyph_position_t pos; | |
| 116 %%{ | |
| 117 write init; | |
| 118 write exec; | |
| 119 }%% | |
| 120 | |
| 121 *end_ptr = p; | |
| 122 | |
| 123 return p == pe && *(p-1) != ']'; | |
| 124 } | |
| 125 | |
| 126 #endif /* HB_BUFFER_DESERIALIZE_TEXT_HH */ |
