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comparison: gfx/harfbuzz/src/hb-buffer-deserialize-json.rl
gfx/harfbuzz/src/hb-buffer-deserialize-json.rl
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
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| -1:000000000000 | 0:f7459dd485df |
|---|---|
| 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_JSON_HH | |
| 28 #define HB_BUFFER_DESERIALIZE_JSON_HH | |
| 29 | |
| 30 #include "hb-private.hh" | |
| 31 | |
| 32 %%{ | |
| 33 | |
| 34 machine deserialize_json; | |
| 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_gid { if (!parse_uint (tok, p, &info.codepoint)) return false; } | |
| 63 action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; } | |
| 64 action parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; } | |
| 65 action parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; } | |
| 66 action parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; } | |
| 67 action parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; } | |
| 68 | |
| 69 unum = '0' | [1-9] digit*; | |
| 70 num = '-'? unum; | |
| 71 | |
| 72 comma = space* ',' space*; | |
| 73 colon = space* ':' space*; | |
| 74 | |
| 75 glyph_id = unum; | |
| 76 glyph_name = alpha (alnum|'_'|'.'|'-')*; | |
| 77 | |
| 78 glyph_string = '"' (glyph_name >tok %parse_glyph) '"'; | |
| 79 glyph_number = (glyph_id >tok %parse_gid); | |
| 80 | |
| 81 glyph = "\"g\"" colon (glyph_string | glyph_number); | |
| 82 cluster = "\"cl\"" colon (unum >tok %parse_cluster); | |
| 83 xoffset = "\"dx\"" colon (num >tok %parse_x_offset); | |
| 84 yoffset = "\"dy\"" colon (num >tok %parse_y_offset); | |
| 85 xadvance= "\"ax\"" colon (num >tok %parse_x_advance); | |
| 86 yadvance= "\"ay\"" colon (num >tok %parse_y_advance); | |
| 87 | |
| 88 element = glyph | cluster | xoffset | yoffset | xadvance | yadvance; | |
| 89 item = | |
| 90 ( '{' space* element (comma element)* space* '}') | |
| 91 >clear_item | |
| 92 @add_item | |
| 93 ; | |
| 94 | |
| 95 main := space* item (comma item)* space* (','|']')?; | |
| 96 | |
| 97 }%% | |
| 98 | |
| 99 static hb_bool_t | |
| 100 _hb_buffer_deserialize_glyphs_json (hb_buffer_t *buffer, | |
| 101 const char *buf, | |
| 102 unsigned int buf_len, | |
| 103 const char **end_ptr, | |
| 104 hb_font_t *font) | |
| 105 { | |
| 106 const char *p = buf, *pe = buf + buf_len; | |
| 107 | |
| 108 /* Ensure we have positions. */ | |
| 109 (void) hb_buffer_get_glyph_positions (buffer, NULL); | |
| 110 | |
| 111 while (p < pe && ISSPACE (*p)) | |
| 112 p++; | |
| 113 if (p < pe && *p == (buffer->len ? ',' : '[')) | |
| 114 { | |
| 115 *end_ptr = ++p; | |
| 116 } | |
| 117 | |
| 118 const char *tok = NULL; | |
| 119 int cs; | |
| 120 hb_glyph_info_t info; | |
| 121 hb_glyph_position_t pos; | |
| 122 %%{ | |
| 123 write init; | |
| 124 write exec; | |
| 125 }%% | |
| 126 | |
| 127 *end_ptr = p; | |
| 128 | |
| 129 return p == pe && *(p-1) != ']'; | |
| 130 } | |
| 131 | |
| 132 #endif /* HB_BUFFER_DESERIALIZE_JSON_HH */ |
