gfx/harfbuzz/src/hb-buffer-deserialize-text.rl@925c144e1f1f (annotated)
gfx/harfbuzz/src/hb-buffer-deserialize-text.rl
Fri, 16 Jan 2015 18:13:44 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 18:13:44 +0100
- branch
- TOR_BUG_9701
- changeset 14
- 925c144e1f1f
- permissions
- -rw-r--r--
Integrate suggestion from review to improve consistency with existing code.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright © 2013 Google, Inc. |
| michael@0 | 3 | * |
| michael@0 | 4 | * This is part of HarfBuzz, a text shaping library. |
| michael@0 | 5 | * |
| michael@0 | 6 | * Permission is hereby granted, without written agreement and without |
| michael@0 | 7 | * license or royalty fees, to use, copy, modify, and distribute this |
| michael@0 | 8 | * software and its documentation for any purpose, provided that the |
| michael@0 | 9 | * above copyright notice and the following two paragraphs appear in |
| michael@0 | 10 | * all copies of this software. |
| michael@0 | 11 | * |
| michael@0 | 12 | * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
| michael@0 | 13 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
| michael@0 | 14 | * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
| michael@0 | 15 | * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
| michael@0 | 16 | * DAMAGE. |
| michael@0 | 17 | * |
| michael@0 | 18 | * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
| michael@0 | 19 | * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| michael@0 | 20 | * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| michael@0 | 21 | * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
| michael@0 | 22 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| michael@0 | 23 | * |
| michael@0 | 24 | * Google Author(s): Behdad Esfahbod |
| michael@0 | 25 | */ |
| michael@0 | 26 | |
| michael@0 | 27 | #ifndef HB_BUFFER_DESERIALIZE_TEXT_HH |
| michael@0 | 28 | #define HB_BUFFER_DESERIALIZE_TEXT_HH |
| michael@0 | 29 | |
| michael@0 | 30 | #include "hb-private.hh" |
| michael@0 | 31 | |
| michael@0 | 32 | %%{ |
| michael@0 | 33 | |
| michael@0 | 34 | machine deserialize_text; |
| michael@0 | 35 | alphtype unsigned char; |
| michael@0 | 36 | write data; |
| michael@0 | 37 | |
| michael@0 | 38 | action clear_item { |
| michael@0 | 39 | memset (&info, 0, sizeof (info)); |
| michael@0 | 40 | memset (&pos , 0, sizeof (pos )); |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | action add_item { |
| michael@0 | 44 | buffer->add_info (info); |
| michael@0 | 45 | if (buffer->in_error) |
| michael@0 | 46 | return false; |
| michael@0 | 47 | buffer->pos[buffer->len - 1] = pos; |
| michael@0 | 48 | *end_ptr = p; |
| michael@0 | 49 | } |
| michael@0 | 50 | |
| michael@0 | 51 | action tok { |
| michael@0 | 52 | tok = p; |
| michael@0 | 53 | } |
| michael@0 | 54 | |
| michael@0 | 55 | action parse_glyph { |
| michael@0 | 56 | if (!hb_font_glyph_from_string (font, |
| michael@0 | 57 | tok, p - tok, |
| michael@0 | 58 | &info.codepoint)) |
| michael@0 | 59 | return false; |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; } |
| michael@0 | 63 | action parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; } |
| michael@0 | 64 | action parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; } |
| michael@0 | 65 | action parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; } |
| michael@0 | 66 | action parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; } |
| michael@0 | 67 | |
| michael@0 | 68 | unum = '0' | [1-9] digit*; |
| michael@0 | 69 | num = '-'? unum; |
| michael@0 | 70 | |
| michael@0 | 71 | glyph_id = unum; |
| michael@0 | 72 | glyph_name = alpha (alnum|'_'|'.'|'-')*; |
| michael@0 | 73 | |
| michael@0 | 74 | glyph = (glyph_id | glyph_name) >tok %parse_glyph; |
| michael@0 | 75 | cluster = '=' (unum >tok %parse_cluster); |
| michael@0 | 76 | offsets = '@' (num >tok %parse_x_offset) ',' (num >tok %parse_y_offset ); |
| michael@0 | 77 | advances= '+' (num >tok %parse_x_advance) (',' (num >tok %parse_y_advance))?; |
| michael@0 | 78 | item = |
| michael@0 | 79 | ( |
| michael@0 | 80 | glyph |
| michael@0 | 81 | cluster? |
| michael@0 | 82 | offsets? |
| michael@0 | 83 | advances? |
| michael@0 | 84 | ) |
| michael@0 | 85 | >clear_item |
| michael@0 | 86 | %add_item |
| michael@0 | 87 | ; |
| michael@0 | 88 | |
| michael@0 | 89 | main := space* item (space* '|' space* item)* space* ('|'|']')?; |
| michael@0 | 90 | |
| michael@0 | 91 | }%% |
| michael@0 | 92 | |
| michael@0 | 93 | static hb_bool_t |
| michael@0 | 94 | _hb_buffer_deserialize_glyphs_text (hb_buffer_t *buffer, |
| michael@0 | 95 | const char *buf, |
| michael@0 | 96 | unsigned int buf_len, |
| michael@0 | 97 | const char **end_ptr, |
| michael@0 | 98 | hb_font_t *font) |
| michael@0 | 99 | { |
| michael@0 | 100 | const char *p = buf, *pe = buf + buf_len; |
| michael@0 | 101 | |
| michael@0 | 102 | /* Ensure we have positions. */ |
| michael@0 | 103 | (void) hb_buffer_get_glyph_positions (buffer, NULL); |
| michael@0 | 104 | |
| michael@0 | 105 | while (p < pe && ISSPACE (*p)) |
| michael@0 | 106 | p++; |
| michael@0 | 107 | if (p < pe && *p == (buffer->len ? '|' : '[')) |
| michael@0 | 108 | { |
| michael@0 | 109 | *end_ptr = ++p; |
| michael@0 | 110 | } |
| michael@0 | 111 | |
| michael@0 | 112 | const char *eof = pe, *tok = NULL; |
| michael@0 | 113 | int cs; |
| michael@0 | 114 | hb_glyph_info_t info; |
| michael@0 | 115 | hb_glyph_position_t pos; |
| michael@0 | 116 | %%{ |
| michael@0 | 117 | write init; |
| michael@0 | 118 | write exec; |
| michael@0 | 119 | }%% |
| michael@0 | 120 | |
| michael@0 | 121 | *end_ptr = p; |
| michael@0 | 122 | |
| michael@0 | 123 | return p == pe && *(p-1) != ']'; |
| michael@0 | 124 | } |
| michael@0 | 125 | |
| michael@0 | 126 | #endif /* HB_BUFFER_DESERIALIZE_TEXT_HH */ |
