1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-buffer-deserialize-text.rl Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,126 @@
1.4 +/*
1.5 + * Copyright © 2013 Google, Inc.
1.6 + *
1.7 + * This is part of HarfBuzz, a text shaping library.
1.8 + *
1.9 + * Permission is hereby granted, without written agreement and without
1.10 + * license or royalty fees, to use, copy, modify, and distribute this
1.11 + * software and its documentation for any purpose, provided that the
1.12 + * above copyright notice and the following two paragraphs appear in
1.13 + * all copies of this software.
1.14 + *
1.15 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.16 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.17 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.18 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.19 + * DAMAGE.
1.20 + *
1.21 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.22 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.23 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.24 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.25 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.26 + *
1.27 + * Google Author(s): Behdad Esfahbod
1.28 + */
1.29 +
1.30 +#ifndef HB_BUFFER_DESERIALIZE_TEXT_HH
1.31 +#define HB_BUFFER_DESERIALIZE_TEXT_HH
1.32 +
1.33 +#include "hb-private.hh"
1.34 +
1.35 +%%{
1.36 +
1.37 +machine deserialize_text;
1.38 +alphtype unsigned char;
1.39 +write data;
1.40 +
1.41 +action clear_item {
1.42 + memset (&info, 0, sizeof (info));
1.43 + memset (&pos , 0, sizeof (pos ));
1.44 +}
1.45 +
1.46 +action add_item {
1.47 + buffer->add_info (info);
1.48 + if (buffer->in_error)
1.49 + return false;
1.50 + buffer->pos[buffer->len - 1] = pos;
1.51 + *end_ptr = p;
1.52 +}
1.53 +
1.54 +action tok {
1.55 + tok = p;
1.56 +}
1.57 +
1.58 +action parse_glyph {
1.59 + if (!hb_font_glyph_from_string (font,
1.60 + tok, p - tok,
1.61 + &info.codepoint))
1.62 + return false;
1.63 +}
1.64 +
1.65 +action parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; }
1.66 +action parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; }
1.67 +action parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; }
1.68 +action parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; }
1.69 +action parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; }
1.70 +
1.71 +unum = '0' | [1-9] digit*;
1.72 +num = '-'? unum;
1.73 +
1.74 +glyph_id = unum;
1.75 +glyph_name = alpha (alnum|'_'|'.'|'-')*;
1.76 +
1.77 +glyph = (glyph_id | glyph_name) >tok %parse_glyph;
1.78 +cluster = '=' (unum >tok %parse_cluster);
1.79 +offsets = '@' (num >tok %parse_x_offset) ',' (num >tok %parse_y_offset );
1.80 +advances= '+' (num >tok %parse_x_advance) (',' (num >tok %parse_y_advance))?;
1.81 +item =
1.82 + (
1.83 + glyph
1.84 + cluster?
1.85 + offsets?
1.86 + advances?
1.87 + )
1.88 + >clear_item
1.89 + %add_item
1.90 + ;
1.91 +
1.92 +main := space* item (space* '|' space* item)* space* ('|'|']')?;
1.93 +
1.94 +}%%
1.95 +
1.96 +static hb_bool_t
1.97 +_hb_buffer_deserialize_glyphs_text (hb_buffer_t *buffer,
1.98 + const char *buf,
1.99 + unsigned int buf_len,
1.100 + const char **end_ptr,
1.101 + hb_font_t *font)
1.102 +{
1.103 + const char *p = buf, *pe = buf + buf_len;
1.104 +
1.105 + /* Ensure we have positions. */
1.106 + (void) hb_buffer_get_glyph_positions (buffer, NULL);
1.107 +
1.108 + while (p < pe && ISSPACE (*p))
1.109 + p++;
1.110 + if (p < pe && *p == (buffer->len ? '|' : '['))
1.111 + {
1.112 + *end_ptr = ++p;
1.113 + }
1.114 +
1.115 + const char *eof = pe, *tok = NULL;
1.116 + int cs;
1.117 + hb_glyph_info_t info;
1.118 + hb_glyph_position_t pos;
1.119 + %%{
1.120 + write init;
1.121 + write exec;
1.122 + }%%
1.123 +
1.124 + *end_ptr = p;
1.125 +
1.126 + return p == pe && *(p-1) != ']';
1.127 +}
1.128 +
1.129 +#endif /* HB_BUFFER_DESERIALIZE_TEXT_HH */
