1*2d1272b8SAndroid Build Coastguard Worker/* 2*2d1272b8SAndroid Build Coastguard Worker * Copyright © 2013 Google, Inc. 3*2d1272b8SAndroid Build Coastguard Worker * 4*2d1272b8SAndroid Build Coastguard Worker * This is part of HarfBuzz, a text shaping library. 5*2d1272b8SAndroid Build Coastguard Worker * 6*2d1272b8SAndroid Build Coastguard Worker * Permission is hereby granted, without written agreement and without 7*2d1272b8SAndroid Build Coastguard Worker * license or royalty fees, to use, copy, modify, and distribute this 8*2d1272b8SAndroid Build Coastguard Worker * software and its documentation for any purpose, provided that the 9*2d1272b8SAndroid Build Coastguard Worker * above copyright notice and the following two paragraphs appear in 10*2d1272b8SAndroid Build Coastguard Worker * all copies of this software. 11*2d1272b8SAndroid Build Coastguard Worker * 12*2d1272b8SAndroid Build Coastguard Worker * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13*2d1272b8SAndroid Build Coastguard Worker * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14*2d1272b8SAndroid Build Coastguard Worker * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15*2d1272b8SAndroid Build Coastguard Worker * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16*2d1272b8SAndroid Build Coastguard Worker * DAMAGE. 17*2d1272b8SAndroid Build Coastguard Worker * 18*2d1272b8SAndroid Build Coastguard Worker * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19*2d1272b8SAndroid Build Coastguard Worker * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20*2d1272b8SAndroid Build Coastguard Worker * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21*2d1272b8SAndroid Build Coastguard Worker * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22*2d1272b8SAndroid Build Coastguard Worker * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23*2d1272b8SAndroid Build Coastguard Worker * 24*2d1272b8SAndroid Build Coastguard Worker * Google Author(s): Behdad Esfahbod 25*2d1272b8SAndroid Build Coastguard Worker */ 26*2d1272b8SAndroid Build Coastguard Worker 27*2d1272b8SAndroid Build Coastguard Worker#ifndef HB_BUFFER_DESERIALIZE_JSON_HH 28*2d1272b8SAndroid Build Coastguard Worker#define HB_BUFFER_DESERIALIZE_JSON_HH 29*2d1272b8SAndroid Build Coastguard Worker 30*2d1272b8SAndroid Build Coastguard Worker#include "hb.hh" 31*2d1272b8SAndroid Build Coastguard Worker 32*2d1272b8SAndroid Build Coastguard Worker%%{ 33*2d1272b8SAndroid Build Coastguard Worker 34*2d1272b8SAndroid Build Coastguard Workermachine deserialize_json; 35*2d1272b8SAndroid Build Coastguard Workeralphtype unsigned char; 36*2d1272b8SAndroid Build Coastguard Workerwrite data; 37*2d1272b8SAndroid Build Coastguard Worker 38*2d1272b8SAndroid Build Coastguard Workeraction clear_item { 39*2d1272b8SAndroid Build Coastguard Worker hb_memset (&info, 0, sizeof (info)); 40*2d1272b8SAndroid Build Coastguard Worker hb_memset (&pos , 0, sizeof (pos )); 41*2d1272b8SAndroid Build Coastguard Worker} 42*2d1272b8SAndroid Build Coastguard Worker 43*2d1272b8SAndroid Build Coastguard Workeraction add_item { 44*2d1272b8SAndroid Build Coastguard Worker buffer->add_info (info); 45*2d1272b8SAndroid Build Coastguard Worker if (unlikely (!buffer->successful)) 46*2d1272b8SAndroid Build Coastguard Worker return false; 47*2d1272b8SAndroid Build Coastguard Worker buffer->pos[buffer->len - 1] = pos; 48*2d1272b8SAndroid Build Coastguard Worker *end_ptr = p; 49*2d1272b8SAndroid Build Coastguard Worker} 50*2d1272b8SAndroid Build Coastguard Worker 51*2d1272b8SAndroid Build Coastguard Workeraction tok { 52*2d1272b8SAndroid Build Coastguard Worker tok = p; 53*2d1272b8SAndroid Build Coastguard Worker} 54*2d1272b8SAndroid Build Coastguard Worker 55*2d1272b8SAndroid Build Coastguard Workeraction ensure_glyphs { if (unlikely (!buffer->ensure_glyphs ())) return false; } 56*2d1272b8SAndroid Build Coastguard Workeraction ensure_unicode { if (unlikely (!buffer->ensure_unicode ())) return false; } 57*2d1272b8SAndroid Build Coastguard Worker 58*2d1272b8SAndroid Build Coastguard Workeraction parse_glyph_name { 59*2d1272b8SAndroid Build Coastguard Worker /* TODO Unescape \" and \\ if found. */ 60*2d1272b8SAndroid Build Coastguard Worker if (!hb_font_glyph_from_string (font, 61*2d1272b8SAndroid Build Coastguard Worker tok+1, p - tok - 2, /* Skip "" */ 62*2d1272b8SAndroid Build Coastguard Worker &info.codepoint)) 63*2d1272b8SAndroid Build Coastguard Worker return false; 64*2d1272b8SAndroid Build Coastguard Worker} 65*2d1272b8SAndroid Build Coastguard Worker 66*2d1272b8SAndroid Build Coastguard Workeraction parse_codepoint { if (!parse_uint (tok, p, &info.codepoint)) return false; } 67*2d1272b8SAndroid Build Coastguard Workeraction parse_cluster { if (!parse_uint (tok, p, &info.cluster )) return false; } 68*2d1272b8SAndroid Build Coastguard Workeraction parse_x_offset { if (!parse_int (tok, p, &pos.x_offset )) return false; } 69*2d1272b8SAndroid Build Coastguard Workeraction parse_y_offset { if (!parse_int (tok, p, &pos.y_offset )) return false; } 70*2d1272b8SAndroid Build Coastguard Workeraction parse_x_advance { if (!parse_int (tok, p, &pos.x_advance)) return false; } 71*2d1272b8SAndroid Build Coastguard Workeraction parse_y_advance { if (!parse_int (tok, p, &pos.y_advance)) return false; } 72*2d1272b8SAndroid Build Coastguard Workeraction parse_glyph_flags{ if (!parse_uint (tok, p, &info.mask )) return false; } 73*2d1272b8SAndroid Build Coastguard Worker 74*2d1272b8SAndroid Build Coastguard Workerunum = '0' | [1-9] digit*; 75*2d1272b8SAndroid Build Coastguard Workernum = '-'? unum; 76*2d1272b8SAndroid Build Coastguard Worker 77*2d1272b8SAndroid Build Coastguard Workercomma = space* ',' space*; 78*2d1272b8SAndroid Build Coastguard Workercolon = space* ':' space*; 79*2d1272b8SAndroid Build Coastguard Worker 80*2d1272b8SAndroid Build Coastguard Workercodepoint = unum; 81*2d1272b8SAndroid Build Coastguard Workerglyph_name = '"' ([^\\"] | '\\' [\\"])* '"'; 82*2d1272b8SAndroid Build Coastguard Worker 83*2d1272b8SAndroid Build Coastguard Workerparse_glyph_name = (glyph_name >tok %parse_glyph_name); 84*2d1272b8SAndroid Build Coastguard Workerparse_codepoint = (codepoint >tok %parse_codepoint); 85*2d1272b8SAndroid Build Coastguard Worker 86*2d1272b8SAndroid Build Coastguard Workerglyph = "\"g\"" colon (parse_glyph_name | parse_codepoint); 87*2d1272b8SAndroid Build Coastguard Workerunicode = "\"u\"" colon parse_codepoint; 88*2d1272b8SAndroid Build Coastguard Workercluster = "\"cl\"" colon (unum >tok %parse_cluster); 89*2d1272b8SAndroid Build Coastguard Workerxoffset = "\"dx\"" colon (num >tok %parse_x_offset); 90*2d1272b8SAndroid Build Coastguard Workeryoffset = "\"dy\"" colon (num >tok %parse_y_offset); 91*2d1272b8SAndroid Build Coastguard Workerxadvance= "\"ax\"" colon (num >tok %parse_x_advance); 92*2d1272b8SAndroid Build Coastguard Workeryadvance= "\"ay\"" colon (num >tok %parse_y_advance); 93*2d1272b8SAndroid Build Coastguard Workerglyphflags="\"fl\"" colon (unum >tok %parse_glyph_flags); 94*2d1272b8SAndroid Build Coastguard Worker 95*2d1272b8SAndroid Build Coastguard Workerelement = glyph @ensure_glyphs 96*2d1272b8SAndroid Build Coastguard Worker | unicode @ensure_unicode 97*2d1272b8SAndroid Build Coastguard Worker | cluster 98*2d1272b8SAndroid Build Coastguard Worker | xoffset 99*2d1272b8SAndroid Build Coastguard Worker | yoffset 100*2d1272b8SAndroid Build Coastguard Worker | xadvance 101*2d1272b8SAndroid Build Coastguard Worker | yadvance 102*2d1272b8SAndroid Build Coastguard Worker | glyphflags; 103*2d1272b8SAndroid Build Coastguard Workeritem = 104*2d1272b8SAndroid Build Coastguard Worker ( '{' space* element (comma element)* space* '}') 105*2d1272b8SAndroid Build Coastguard Worker >clear_item 106*2d1272b8SAndroid Build Coastguard Worker @add_item 107*2d1272b8SAndroid Build Coastguard Worker ; 108*2d1272b8SAndroid Build Coastguard Worker 109*2d1272b8SAndroid Build Coastguard Workermain := space* item (comma item)* space* (','|']'); 110*2d1272b8SAndroid Build Coastguard Worker 111*2d1272b8SAndroid Build Coastguard Worker}%% 112*2d1272b8SAndroid Build Coastguard Worker 113*2d1272b8SAndroid Build Coastguard Workerstatic hb_bool_t 114*2d1272b8SAndroid Build Coastguard Worker_hb_buffer_deserialize_json (hb_buffer_t *buffer, 115*2d1272b8SAndroid Build Coastguard Worker const char *buf, 116*2d1272b8SAndroid Build Coastguard Worker unsigned int buf_len, 117*2d1272b8SAndroid Build Coastguard Worker const char **end_ptr, 118*2d1272b8SAndroid Build Coastguard Worker hb_font_t *font) 119*2d1272b8SAndroid Build Coastguard Worker{ 120*2d1272b8SAndroid Build Coastguard Worker const char *p = buf, *pe = buf + buf_len; 121*2d1272b8SAndroid Build Coastguard Worker 122*2d1272b8SAndroid Build Coastguard Worker /* Ensure we have positions. */ 123*2d1272b8SAndroid Build Coastguard Worker (void) hb_buffer_get_glyph_positions (buffer, nullptr); 124*2d1272b8SAndroid Build Coastguard Worker 125*2d1272b8SAndroid Build Coastguard Worker while (p < pe && ISSPACE (*p)) 126*2d1272b8SAndroid Build Coastguard Worker p++; 127*2d1272b8SAndroid Build Coastguard Worker if (p < pe && *p == (buffer->len ? ',' : '[')) 128*2d1272b8SAndroid Build Coastguard Worker *end_ptr = ++p; 129*2d1272b8SAndroid Build Coastguard Worker 130*2d1272b8SAndroid Build Coastguard Worker const char *tok = nullptr; 131*2d1272b8SAndroid Build Coastguard Worker int cs; 132*2d1272b8SAndroid Build Coastguard Worker hb_glyph_info_t info = {0}; 133*2d1272b8SAndroid Build Coastguard Worker hb_glyph_position_t pos = {0}; 134*2d1272b8SAndroid Build Coastguard Worker %%{ 135*2d1272b8SAndroid Build Coastguard Worker write init; 136*2d1272b8SAndroid Build Coastguard Worker write exec; 137*2d1272b8SAndroid Build Coastguard Worker }%% 138*2d1272b8SAndroid Build Coastguard Worker 139*2d1272b8SAndroid Build Coastguard Worker *end_ptr = p; 140*2d1272b8SAndroid Build Coastguard Worker 141*2d1272b8SAndroid Build Coastguard Worker return p == pe && *(p-1) != ']'; 142*2d1272b8SAndroid Build Coastguard Worker} 143*2d1272b8SAndroid Build Coastguard Worker 144*2d1272b8SAndroid Build Coastguard Worker#endif /* HB_BUFFER_DESERIALIZE_JSON_HH */ 145