870 lines
26 KiB
C++
870 lines
26 KiB
C++
/*
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* Copyright © 2012,2013 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Behdad Esfahbod
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*/
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#include "hb.hh"
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#ifndef HB_NO_BUFFER_SERIALIZE
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#include "hb-buffer.hh"
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static const char *_hb_buffer_serialize_formats[] = {
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"text",
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"json",
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nullptr
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};
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/**
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* hb_buffer_serialize_list_formats:
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*
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* Returns a list of supported buffer serialization formats.
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*
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* Return value: (transfer none):
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* A string array of buffer serialization formats. Should not be freed.
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*
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* Since: 0.9.7
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**/
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const char **
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hb_buffer_serialize_list_formats ()
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{
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return _hb_buffer_serialize_formats;
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}
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/**
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* hb_buffer_serialize_format_from_string:
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* @str: (array length=len) (element-type uint8_t): a string to parse
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* @len: length of @str, or -1 if string is `NULL` terminated
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*
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* Parses a string into an #hb_buffer_serialize_format_t. Does not check if
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* @str is a valid buffer serialization format, use
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* hb_buffer_serialize_list_formats() to get the list of supported formats.
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*
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* Return value:
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* The parsed #hb_buffer_serialize_format_t.
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*
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* Since: 0.9.7
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**/
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hb_buffer_serialize_format_t
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hb_buffer_serialize_format_from_string (const char *str, int len)
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{
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/* Upper-case it. */
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return (hb_buffer_serialize_format_t) (hb_tag_from_string (str, len) & ~0x20202020u);
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}
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/**
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* hb_buffer_serialize_format_to_string:
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* @format: an #hb_buffer_serialize_format_t to convert.
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*
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* Converts @format to the string corresponding it, or `NULL` if it is not a valid
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* #hb_buffer_serialize_format_t.
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*
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* Return value: (transfer none):
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* A `NULL` terminated string corresponding to @format. Should not be freed.
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*
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* Since: 0.9.7
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**/
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const char *
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hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format)
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{
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switch ((unsigned) format)
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{
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case HB_BUFFER_SERIALIZE_FORMAT_TEXT: return _hb_buffer_serialize_formats[0];
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case HB_BUFFER_SERIALIZE_FORMAT_JSON: return _hb_buffer_serialize_formats[1];
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default:
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case HB_BUFFER_SERIALIZE_FORMAT_INVALID: return nullptr;
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}
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}
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static unsigned int
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_hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
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unsigned int start,
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unsigned int end,
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char *buf,
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unsigned int buf_size,
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unsigned int *buf_consumed,
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hb_font_t *font,
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hb_buffer_serialize_flags_t flags)
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{
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hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
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hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
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nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);
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*buf_consumed = 0;
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hb_position_t x = 0, y = 0;
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for (unsigned int i = start; i < end; i++)
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{
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char b[1024];
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char *p = b;
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/* In the following code, we know b is large enough that no overflow can happen. */
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#define APPEND(s) HB_STMT_START { strcpy (p, s); p += strlen (s); } HB_STMT_END
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if (i)
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*p++ = ',';
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else
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*p++ = '[';
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*p++ = '{';
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APPEND ("\"g\":");
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
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{
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char g[128];
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hb_font_glyph_to_string (font, info[i].codepoint, g, sizeof (g));
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*p++ = '"';
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for (char *q = g; *q; q++)
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{
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if (unlikely (*q == '"' || *q == '\\'))
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*p++ = '\\';
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*p++ = *q;
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}
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*p++ = '"';
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}
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else
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
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}
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
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{
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"dx\":%d,\"dy\":%d",
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x+pos[i].x_offset, y+pos[i].y_offset));
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"ax\":%d,\"ay\":%d",
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pos[i].x_advance, pos[i].y_advance));
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}
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if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS)
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{
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if (info[i].mask & HB_GLYPH_FLAG_DEFINED)
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"fl\":%u", info[i].mask & HB_GLYPH_FLAG_DEFINED));
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}
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if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS)
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{
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hb_glyph_extents_t extents;
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hb_font_get_glyph_extents(font, info[i].codepoint, &extents);
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"xb\":%d,\"yb\":%d",
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extents.x_bearing, extents.y_bearing));
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"w\":%d,\"h\":%d",
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extents.width, extents.height));
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}
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*p++ = '}';
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if (i == end-1)
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*p++ = ']';
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unsigned int l = p - b;
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if (buf_size > l)
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{
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memcpy (buf, b, l);
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buf += l;
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buf_size -= l;
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*buf_consumed += l;
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*buf = '\0';
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} else
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return i - start;
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if (pos && (flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
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{
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x += pos[i].x_advance;
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y += pos[i].y_advance;
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}
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}
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return end - start;
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}
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static unsigned int
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_hb_buffer_serialize_unicode_json (hb_buffer_t *buffer,
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unsigned int start,
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unsigned int end,
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char *buf,
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unsigned int buf_size,
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unsigned int *buf_consumed,
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hb_buffer_serialize_flags_t flags)
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{
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hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
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*buf_consumed = 0;
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for (unsigned int i = start; i < end; i++)
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{
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char b[1024];
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char *p = b;
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if (i)
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*p++ = ',';
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else
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*p++ = '[';
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*p++ = '{';
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APPEND ("\"u\":");
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
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}
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*p++ = '}';
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if (i == end-1)
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*p++ = ']';
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unsigned int l = p - b;
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if (buf_size > l)
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{
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memcpy (buf, b, l);
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buf += l;
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buf_size -= l;
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*buf_consumed += l;
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*buf = '\0';
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} else
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return i - start;
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}
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return end - start;
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}
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static unsigned int
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_hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
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unsigned int start,
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unsigned int end,
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char *buf,
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unsigned int buf_size,
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unsigned int *buf_consumed,
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hb_font_t *font,
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hb_buffer_serialize_flags_t flags)
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{
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hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
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hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
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nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);
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*buf_consumed = 0;
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hb_position_t x = 0, y = 0;
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for (unsigned int i = start; i < end; i++)
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{
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char b[1024];
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char *p = b;
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/* In the following code, we know b is large enough that no overflow can happen. */
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if (i)
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*p++ = '|';
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else
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*p++ = '[';
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
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{
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/* TODO Escape delimiters we use. */
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hb_font_glyph_to_string (font, info[i].codepoint, p, 128);
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p += strlen (p);
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}
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else
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
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}
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
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{
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if (x+pos[i].x_offset || y+pos[i].y_offset)
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", x+pos[i].x_offset, y+pos[i].y_offset));
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
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{
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*p++ = '+';
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance));
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if (pos[i].y_advance)
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",%d", pos[i].y_advance));
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}
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}
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if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS)
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{
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if (info[i].mask & HB_GLYPH_FLAG_DEFINED)
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "#%X", info[i].mask &HB_GLYPH_FLAG_DEFINED));
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}
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if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS)
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{
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hb_glyph_extents_t extents;
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hb_font_get_glyph_extents(font, info[i].codepoint, &extents);
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "<%d,%d,%d,%d>", extents.x_bearing, extents.y_bearing, extents.width, extents.height));
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}
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if (i == end-1) {
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*p++ = ']';
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}
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unsigned int l = p - b;
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if (buf_size > l)
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{
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memcpy (buf, b, l);
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buf += l;
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buf_size -= l;
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*buf_consumed += l;
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*buf = '\0';
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} else
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return i - start;
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if (pos && (flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
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{
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x += pos[i].x_advance;
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y += pos[i].y_advance;
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}
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}
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return end - start;
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}
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static unsigned int
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_hb_buffer_serialize_unicode_text (hb_buffer_t *buffer,
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unsigned int start,
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unsigned int end,
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char *buf,
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unsigned int buf_size,
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unsigned int *buf_consumed,
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hb_buffer_serialize_flags_t flags)
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{
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hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
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*buf_consumed = 0;
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for (unsigned int i = start; i < end; i++)
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{
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char b[1024];
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char *p = b;
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if (i)
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*p++ = '|';
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else
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*p++ = '<';
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "U+%04X", info[i].codepoint));
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if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
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p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
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}
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if (i == end-1)
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*p++ = '>';
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unsigned int l = p - b;
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if (buf_size > l)
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{
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memcpy (buf, b, l);
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buf += l;
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buf_size -= l;
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*buf_consumed += l;
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*buf = '\0';
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} else
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return i - start;
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}
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return end - start;
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}
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/**
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* hb_buffer_serialize_glyphs:
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* @buffer: an #hb_buffer_t buffer.
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* @start: the first item in @buffer to serialize.
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* @end: the last item in @buffer to serialize.
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* @buf: (out) (array length=buf_size) (element-type uint8_t): output string to
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* write serialized buffer into.
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* @buf_size: the size of @buf.
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* @buf_consumed: (out) (optional): if not `NULL`, will be set to the number of bytes written into @buf.
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* @font: (nullable): the #hb_font_t used to shape this buffer, needed to
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* read glyph names and extents. If `NULL`, an empty font will be used.
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* @format: the #hb_buffer_serialize_format_t to use for formatting the output.
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* @flags: the #hb_buffer_serialize_flags_t that control what glyph properties
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* to serialize.
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*
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* Serializes @buffer into a textual representation of its glyph content,
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* useful for showing the contents of the buffer, for example during debugging.
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* There are currently two supported serialization formats:
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*
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* ## text
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* A human-readable, plain text format.
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* The serialized glyphs will look something like:
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*
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* ```
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* [uni0651=0@518,0+0|uni0628=0+1897]
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* ```
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*
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* - The serialized glyphs are delimited with `[` and `]`.
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* - Glyphs are separated with `|`
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* - Each glyph starts with glyph name, or glyph index if
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* #HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set. Then,
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* - If #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, `=` then #hb_glyph_info_t.cluster.
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* - If #HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set, the #hb_glyph_position_t in the format:
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* - If both #hb_glyph_position_t.x_offset and #hb_glyph_position_t.y_offset are not 0, `@x_offset,y_offset`. Then,
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* - `+x_advance`, then `,y_advance` if #hb_glyph_position_t.y_advance is not 0. Then,
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* - If #HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set, the #hb_glyph_extents_t in the format `<x_bearing,y_bearing,width,height>`
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*
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* ## json
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* A machine-readable, structured format.
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* The serialized glyphs will look something like:
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*
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* ```
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* [{"g":"uni0651","cl":0,"dx":518,"dy":0,"ax":0,"ay":0},
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* {"g":"uni0628","cl":0,"dx":0,"dy":0,"ax":1897,"ay":0}]
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* ```
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*
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* Each glyph is a JSON object, with the following properties:
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* - `g`: the glyph name or glyph index if
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* #HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set.
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* - `cl`: #hb_glyph_info_t.cluster if
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* #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.
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* - `dx`,`dy`,`ax`,`ay`: #hb_glyph_position_t.x_offset, #hb_glyph_position_t.y_offset,
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* #hb_glyph_position_t.x_advance and #hb_glyph_position_t.y_advance
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* respectively, if #HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set.
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* - `xb`,`yb`,`w`,`h`: #hb_glyph_extents_t.x_bearing, #hb_glyph_extents_t.y_bearing,
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* #hb_glyph_extents_t.width and #hb_glyph_extents_t.height respectively if
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* #HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set.
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*
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* Return value:
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* The number of serialized items.
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*
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* Since: 0.9.7
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**/
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unsigned int
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hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
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unsigned int start,
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unsigned int end,
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char *buf,
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unsigned int buf_size,
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unsigned int *buf_consumed,
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hb_font_t *font,
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hb_buffer_serialize_format_t format,
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hb_buffer_serialize_flags_t flags)
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{
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end = hb_clamp (end, start, buffer->len);
|
||
start = hb_min (start, end);
|
||
|
||
unsigned int sconsumed;
|
||
if (!buf_consumed)
|
||
buf_consumed = &sconsumed;
|
||
*buf_consumed = 0;
|
||
if (buf_size)
|
||
*buf = '\0';
|
||
|
||
buffer->assert_glyphs ();
|
||
|
||
if (!buffer->have_positions)
|
||
flags |= HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS;
|
||
|
||
if (unlikely (start == end))
|
||
return 0;
|
||
|
||
if (!font)
|
||
font = hb_font_get_empty ();
|
||
|
||
switch (format)
|
||
{
|
||
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
|
||
return _hb_buffer_serialize_glyphs_text (buffer, start, end,
|
||
buf, buf_size, buf_consumed,
|
||
font, flags);
|
||
|
||
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
|
||
return _hb_buffer_serialize_glyphs_json (buffer, start, end,
|
||
buf, buf_size, buf_consumed,
|
||
font, flags);
|
||
|
||
default:
|
||
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
|
||
return 0;
|
||
|
||
}
|
||
}
|
||
|
||
/**
|
||
* hb_buffer_serialize_unicode:
|
||
* @buffer: an #hb_buffer_t buffer.
|
||
* @start: the first item in @buffer to serialize.
|
||
* @end: the last item in @buffer to serialize.
|
||
* @buf: (out) (array length=buf_size) (element-type uint8_t): output string to
|
||
* write serialized buffer into.
|
||
* @buf_size: the size of @buf.
|
||
* @buf_consumed: (out) (optional): if not `NULL`, will be set to the number of bytes written into @buf.
|
||
* @format: the #hb_buffer_serialize_format_t to use for formatting the output.
|
||
* @flags: the #hb_buffer_serialize_flags_t that control what glyph properties
|
||
* to serialize.
|
||
*
|
||
* Serializes @buffer into a textual representation of its content,
|
||
* when the buffer contains Unicode codepoints (i.e., before shaping). This is
|
||
* useful for showing the contents of the buffer, for example during debugging.
|
||
* There are currently two supported serialization formats:
|
||
*
|
||
* ## text
|
||
* A human-readable, plain text format.
|
||
* The serialized codepoints will look something like:
|
||
*
|
||
* ```
|
||
* <U+0651=0|U+0628=1>
|
||
* ```
|
||
*
|
||
* - Glyphs are separated with `|`
|
||
* - Unicode codepoints are expressed as zero-padded four (or more)
|
||
* digit hexadecimal numbers preceded by `U+`
|
||
* - If #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, the cluster
|
||
* will be indicated with a `=` then #hb_glyph_info_t.cluster.
|
||
*
|
||
* ## json
|
||
* A machine-readable, structured format.
|
||
* The serialized codepoints will be a list of objects with the following
|
||
* properties:
|
||
* - `u`: the Unicode codepoint as a decimal integer
|
||
* - `cl`: #hb_glyph_info_t.cluster if
|
||
* #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.
|
||
*
|
||
* For example:
|
||
*
|
||
* ```
|
||
* [{u:1617,cl:0},{u:1576,cl:1}]
|
||
* ```
|
||
*
|
||
* Return value:
|
||
* The number of serialized items.
|
||
*
|
||
* Since: 2.7.3
|
||
**/
|
||
unsigned int
|
||
hb_buffer_serialize_unicode (hb_buffer_t *buffer,
|
||
unsigned int start,
|
||
unsigned int end,
|
||
char *buf,
|
||
unsigned int buf_size,
|
||
unsigned int *buf_consumed,
|
||
hb_buffer_serialize_format_t format,
|
||
hb_buffer_serialize_flags_t flags)
|
||
{
|
||
end = hb_clamp (end, start, buffer->len);
|
||
start = hb_min (start, end);
|
||
|
||
unsigned int sconsumed;
|
||
if (!buf_consumed)
|
||
buf_consumed = &sconsumed;
|
||
*buf_consumed = 0;
|
||
if (buf_size)
|
||
*buf = '\0';
|
||
|
||
buffer->assert_unicode ();
|
||
|
||
if (unlikely (start == end))
|
||
return 0;
|
||
|
||
switch (format)
|
||
{
|
||
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
|
||
return _hb_buffer_serialize_unicode_text (buffer, start, end,
|
||
buf, buf_size, buf_consumed, flags);
|
||
|
||
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
|
||
return _hb_buffer_serialize_unicode_json (buffer, start, end,
|
||
buf, buf_size, buf_consumed, flags);
|
||
|
||
default:
|
||
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
|
||
return 0;
|
||
|
||
}
|
||
}
|
||
|
||
static unsigned int
|
||
_hb_buffer_serialize_invalid (hb_buffer_t *buffer,
|
||
unsigned int start,
|
||
unsigned int end,
|
||
char *buf,
|
||
unsigned int buf_size,
|
||
unsigned int *buf_consumed,
|
||
hb_buffer_serialize_format_t format,
|
||
hb_buffer_serialize_flags_t flags)
|
||
{
|
||
assert (!buffer->len);
|
||
|
||
unsigned int sconsumed;
|
||
if (!buf_consumed)
|
||
buf_consumed = &sconsumed;
|
||
if (buf_size < 3)
|
||
return 0;
|
||
if (format == HB_BUFFER_SERIALIZE_FORMAT_JSON) {
|
||
*buf++ = '[';
|
||
*buf++ = ']';
|
||
*buf = '\0';
|
||
} else if (format == HB_BUFFER_SERIALIZE_FORMAT_TEXT) {
|
||
*buf++ = '!';
|
||
*buf++ = '!';
|
||
*buf = '\0';
|
||
}
|
||
*buf_consumed = 2;
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* hb_buffer_serialize:
|
||
* @buffer: an #hb_buffer_t buffer.
|
||
* @start: the first item in @buffer to serialize.
|
||
* @end: the last item in @buffer to serialize.
|
||
* @buf: (out) (array length=buf_size) (element-type uint8_t): output string to
|
||
* write serialized buffer into.
|
||
* @buf_size: the size of @buf.
|
||
* @buf_consumed: (out) (optional): if not `NULL`, will be set to the number of bytes written into @buf.
|
||
* @font: (nullable): the #hb_font_t used to shape this buffer, needed to
|
||
* read glyph names and extents. If `NULL`, an empty font will be used.
|
||
* @format: the #hb_buffer_serialize_format_t to use for formatting the output.
|
||
* @flags: the #hb_buffer_serialize_flags_t that control what glyph properties
|
||
* to serialize.
|
||
*
|
||
* Serializes @buffer into a textual representation of its content, whether
|
||
* Unicode codepoints or glyph identifiers and positioning information. This is
|
||
* useful for showing the contents of the buffer, for example during debugging.
|
||
* See the documentation of hb_buffer_serialize_unicode() and
|
||
* hb_buffer_serialize_glyphs() for a description of the output format.
|
||
*
|
||
* Return value:
|
||
* The number of serialized items.
|
||
*
|
||
* Since: 2.7.3
|
||
**/
|
||
unsigned int
|
||
hb_buffer_serialize (hb_buffer_t *buffer,
|
||
unsigned int start,
|
||
unsigned int end,
|
||
char *buf,
|
||
unsigned int buf_size,
|
||
unsigned int *buf_consumed,
|
||
hb_font_t *font,
|
||
hb_buffer_serialize_format_t format,
|
||
hb_buffer_serialize_flags_t flags)
|
||
{
|
||
switch (buffer->content_type)
|
||
{
|
||
|
||
case HB_BUFFER_CONTENT_TYPE_GLYPHS:
|
||
return hb_buffer_serialize_glyphs (buffer, start, end, buf, buf_size,
|
||
buf_consumed, font, format, flags);
|
||
|
||
case HB_BUFFER_CONTENT_TYPE_UNICODE:
|
||
return hb_buffer_serialize_unicode (buffer, start, end, buf, buf_size,
|
||
buf_consumed, format, flags);
|
||
|
||
case HB_BUFFER_CONTENT_TYPE_INVALID:
|
||
default:
|
||
return _hb_buffer_serialize_invalid (buffer, start, end, buf, buf_size,
|
||
buf_consumed, format, flags);
|
||
}
|
||
}
|
||
|
||
static bool
|
||
parse_int (const char *pp, const char *end, int32_t *pv)
|
||
{
|
||
int v;
|
||
const char *p = pp;
|
||
if (unlikely (!hb_parse_int (&p, end, &v, true/* whole buffer */)))
|
||
return false;
|
||
|
||
*pv = v;
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
parse_uint (const char *pp, const char *end, uint32_t *pv)
|
||
{
|
||
unsigned int v;
|
||
const char *p = pp;
|
||
if (unlikely (!hb_parse_uint (&p, end, &v, true/* whole buffer */)))
|
||
return false;
|
||
|
||
*pv = v;
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
parse_hex (const char *pp, const char *end, uint32_t *pv)
|
||
{
|
||
unsigned int v;
|
||
const char *p = pp;
|
||
if (unlikely (!hb_parse_uint (&p, end, &v, true/* whole buffer */, 16)))
|
||
return false;
|
||
|
||
*pv = v;
|
||
return true;
|
||
}
|
||
|
||
#include "hb-buffer-deserialize-json.hh"
|
||
#include "hb-buffer-deserialize-text.hh"
|
||
|
||
/**
|
||
* hb_buffer_deserialize_glyphs:
|
||
* @buffer: an #hb_buffer_t buffer.
|
||
* @buf: (array length=buf_len): string to deserialize
|
||
* @buf_len: the size of @buf, or -1 if it is `NULL`-terminated
|
||
* @end_ptr: (out) (optional): output pointer to the character after last
|
||
* consumed one.
|
||
* @font: (nullable): font for getting glyph IDs
|
||
* @format: the #hb_buffer_serialize_format_t of the input @buf
|
||
*
|
||
* Deserializes glyphs @buffer from textual representation in the format
|
||
* produced by hb_buffer_serialize_glyphs().
|
||
*
|
||
* Return value: `true` if @buf is not fully consumed, `false` otherwise.
|
||
*
|
||
* Since: 0.9.7
|
||
**/
|
||
hb_bool_t
|
||
hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
|
||
const char *buf,
|
||
int buf_len, /* -1 means nul-terminated */
|
||
const char **end_ptr, /* May be NULL */
|
||
hb_font_t *font, /* May be NULL */
|
||
hb_buffer_serialize_format_t format)
|
||
{
|
||
const char *end;
|
||
if (!end_ptr)
|
||
end_ptr = &end;
|
||
*end_ptr = buf;
|
||
|
||
buffer->assert_glyphs ();
|
||
|
||
if (unlikely (hb_object_is_immutable (buffer)))
|
||
{
|
||
if (end_ptr)
|
||
*end_ptr = buf;
|
||
return false;
|
||
}
|
||
|
||
if (buf_len == -1)
|
||
buf_len = strlen (buf);
|
||
|
||
if (!buf_len)
|
||
{
|
||
*end_ptr = buf;
|
||
return false;
|
||
}
|
||
|
||
hb_buffer_set_content_type (buffer, HB_BUFFER_CONTENT_TYPE_GLYPHS);
|
||
|
||
if (!font)
|
||
font = hb_font_get_empty ();
|
||
|
||
switch (format)
|
||
{
|
||
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
|
||
return _hb_buffer_deserialize_text (buffer,
|
||
buf, buf_len, end_ptr,
|
||
font);
|
||
|
||
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
|
||
return _hb_buffer_deserialize_json (buffer,
|
||
buf, buf_len, end_ptr,
|
||
font);
|
||
|
||
default:
|
||
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
|
||
return false;
|
||
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* hb_buffer_deserialize_unicode:
|
||
* @buffer: an #hb_buffer_t buffer.
|
||
* @buf: (array length=buf_len): string to deserialize
|
||
* @buf_len: the size of @buf, or -1 if it is `NULL`-terminated
|
||
* @end_ptr: (out) (optional): output pointer to the character after last
|
||
* consumed one.
|
||
* @format: the #hb_buffer_serialize_format_t of the input @buf
|
||
*
|
||
* Deserializes Unicode @buffer from textual representation in the format
|
||
* produced by hb_buffer_serialize_unicode().
|
||
*
|
||
* Return value: `true` if @buf is not fully consumed, `false` otherwise.
|
||
*
|
||
* Since: 2.7.3
|
||
**/
|
||
hb_bool_t
|
||
hb_buffer_deserialize_unicode (hb_buffer_t *buffer,
|
||
const char *buf,
|
||
int buf_len, /* -1 means nul-terminated */
|
||
const char **end_ptr, /* May be NULL */
|
||
hb_buffer_serialize_format_t format)
|
||
{
|
||
const char *end;
|
||
if (!end_ptr)
|
||
end_ptr = &end;
|
||
*end_ptr = buf;
|
||
|
||
buffer->assert_unicode ();
|
||
|
||
if (unlikely (hb_object_is_immutable (buffer)))
|
||
{
|
||
if (end_ptr)
|
||
*end_ptr = buf;
|
||
return false;
|
||
}
|
||
|
||
if (buf_len == -1)
|
||
buf_len = strlen (buf);
|
||
|
||
if (!buf_len)
|
||
{
|
||
*end_ptr = buf;
|
||
return false;
|
||
}
|
||
|
||
hb_buffer_set_content_type (buffer, HB_BUFFER_CONTENT_TYPE_UNICODE);
|
||
|
||
hb_font_t* font = hb_font_get_empty ();
|
||
|
||
switch (format)
|
||
{
|
||
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
|
||
return _hb_buffer_deserialize_text (buffer,
|
||
buf, buf_len, end_ptr,
|
||
font);
|
||
|
||
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
|
||
return _hb_buffer_deserialize_json (buffer,
|
||
buf, buf_len, end_ptr,
|
||
font);
|
||
|
||
default:
|
||
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
|
||
return false;
|
||
|
||
}
|
||
}
|
||
|
||
|
||
#endif
|