tor-browser

hb-buffer-serialize.cc (26321B)

---

/*
* Copyright © 2012,2013  Google, Inc.
*
*  This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/

#include "hb.hh"

#ifndef HB_NO_BUFFER_SERIALIZE

#include "hb-buffer.hh"


static const char *_hb_buffer_serialize_formats[] = {
 "text",
 "json",
 nullptr
};

/**
* hb_buffer_serialize_list_formats:
*
* Returns a list of supported buffer serialization formats.
*
* Return value: (transfer none):
* A string array of buffer serialization formats. Should not be freed.
*
* Since: 0.9.7
**/
const char **
hb_buffer_serialize_list_formats ()
{
 return _hb_buffer_serialize_formats;
}

/**
* hb_buffer_serialize_format_from_string:
* @str: (array length=len) (element-type uint8_t): a string to parse
* @len: length of @str, or -1 if string is `NULL` terminated
*
* Parses a string into an #hb_buffer_serialize_format_t. Does not check if
* @str is a valid buffer serialization format, use
* hb_buffer_serialize_list_formats() to get the list of supported formats.
*
* Return value:
* The parsed #hb_buffer_serialize_format_t.
*
* Since: 0.9.7
**/
hb_buffer_serialize_format_t
hb_buffer_serialize_format_from_string (const char *str, int len)
{
 /* Upper-case it. */
 return (hb_buffer_serialize_format_t) (hb_tag_from_string (str, len) & ~0x20202020u);
}

/**
* hb_buffer_serialize_format_to_string:
* @format: an #hb_buffer_serialize_format_t to convert.
*
* Converts @format to the string corresponding it, or `NULL` if it is not a valid
* #hb_buffer_serialize_format_t.
*
* Return value: (transfer none):
* A `NULL` terminated string corresponding to @format. Should not be freed.
*
* Since: 0.9.7
**/
const char *
hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format)
{
 switch ((unsigned) format)
 {
   case HB_BUFFER_SERIALIZE_FORMAT_TEXT: return _hb_buffer_serialize_formats[0];
   case HB_BUFFER_SERIALIZE_FORMAT_JSON: return _hb_buffer_serialize_formats[1];
   default:
   case HB_BUFFER_SERIALIZE_FORMAT_INVALID:  return nullptr;
 }
}

static unsigned int
_hb_buffer_serialize_glyphs_json (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_flags_t flags)
{
 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
 hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
                            nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);

 *buf_consumed = 0;
 hb_position_t x = 0, y = 0;
 for (unsigned int i = start; i < end; i++)
 {
   char b[1024];
   char *p = b;

   /* In the following code, we know b is large enough that no overflow can happen. */

#define APPEND(s) HB_STMT_START { strcpy (p, s); p += strlen (s); } HB_STMT_END

   if (i)
     *p++ = ',';
   else
     *p++ = '[';

   *p++ = '{';

   APPEND ("\"g\":");
   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
   {
     char g[128];
     hb_font_glyph_to_string (font, info[i].codepoint, g, sizeof (g));
     *p++ = '"';
     for (char *q = g; *q; q++)
     {
if (unlikely (*q == '"' || *q == '\\'))
  *p++ = '\\';
*p++ = *q;
     }
     *p++ = '"';
   }
   else
     p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));

   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
     p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
   }

   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
   {
     p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"dx\":%d,\"dy\":%d",
	   x+pos[i].x_offset, y+pos[i].y_offset));
     if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
       p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"ax\":%d,\"ay\":%d",
	     pos[i].x_advance, pos[i].y_advance));
   }

   if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS)
   {
     if (info[i].mask & HB_GLYPH_FLAG_DEFINED)
       p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"fl\":%u", info[i].mask & HB_GLYPH_FLAG_DEFINED));
   }

   if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS)
   {
     hb_glyph_extents_t extents;
     if (hb_font_get_glyph_extents(font, info[i].codepoint, &extents))
     {
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"xb\":%d,\"yb\":%d",
			  extents.x_bearing, extents.y_bearing));
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"w\":%d,\"h\":%d",
			  extents.width, extents.height));
     }
   }

   *p++ = '}';
   if (i == end-1)
     *p++ = ']';

   unsigned int l = p - b;
   if (buf_size > l)
   {
     hb_memcpy (buf, b, l);
     buf += l;
     buf_size -= l;
     *buf_consumed += l;
     *buf = '\0';
   } else
     return i - start;

   if (pos && (flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
   {
     x += pos[i].x_advance;
     y += pos[i].y_advance;
   }
 }

 return end - start;
}

static unsigned int
_hb_buffer_serialize_unicode_json (hb_buffer_t *buffer,
         unsigned int start,
         unsigned int end,
         char *buf,
         unsigned int buf_size,
         unsigned int *buf_consumed,
         hb_buffer_serialize_flags_t flags)
{
 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);

 *buf_consumed = 0;
 for (unsigned int i = start; i < end; i++)
 {
   char b[1024];
   char *p = b;

   if (i)
     *p++ = ',';
   else
     *p++ = '[';

   *p++ = '{';

   APPEND ("\"u\":");

   p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));

   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
     p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
   }

   *p++ = '}';

   if (i == end-1)
     *p++ = ']';

   unsigned int l = p - b;
   if (buf_size > l)
   {
     hb_memcpy (buf, b, l);
     buf += l;
     buf_size -= l;
     *buf_consumed += l;
     *buf = '\0';
   } else
     return i - start;

 }

 return end - start;
}

static unsigned int
_hb_buffer_serialize_glyphs_text (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_flags_t flags)
{
 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
 hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
          nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);

 *buf_consumed = 0;
 hb_position_t x = 0, y = 0;
 for (unsigned int i = start; i < end; i++)
 {
   char b[1024];
   char *p = b;

   /* In the following code, we know b is large enough that no overflow can happen. */

   if (i)
     *p++ = '|';
   else
     *p++ = '[';

   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
   {
     /* TODO Escape delimiters we use. */
     hb_font_glyph_to_string (font, info[i].codepoint, p, 128);
     p += strlen (p);
   }
   else
     p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));

   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
     p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
   }

   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
   {
     if (x+pos[i].x_offset || y+pos[i].y_offset)
       p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", x+pos[i].x_offset, y+pos[i].y_offset));

     if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
     {
       *p++ = '+';
       p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance));
       if (pos[i].y_advance)
         p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",%d", pos[i].y_advance));
     }
   }

   if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS)
   {
     if (info[i].mask & HB_GLYPH_FLAG_DEFINED)
       p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "#%X", info[i].mask &HB_GLYPH_FLAG_DEFINED));
   }

   if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS)
   {
     hb_glyph_extents_t extents;
     if (hb_font_get_glyph_extents(font, info[i].codepoint, &extents))
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));
   }

   if (i == end-1) {
     *p++ = ']';
   }

   unsigned int l = p - b;
   if (buf_size > l)
   {
     hb_memcpy (buf, b, l);
     buf += l;
     buf_size -= l;
     *buf_consumed += l;
     *buf = '\0';
   } else
     return i - start;

   if (pos && (flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
   {
     x += pos[i].x_advance;
     y += pos[i].y_advance;
   }
 }

 return end - start;
}


static unsigned int
_hb_buffer_serialize_unicode_text (hb_buffer_t *buffer,
                                  unsigned int start,
                                  unsigned int end,
                                  char *buf,
                                  unsigned int buf_size,
                                  unsigned int *buf_consumed,
                                  hb_buffer_serialize_flags_t flags)
{
 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
 *buf_consumed = 0;
 for (unsigned int i = start; i < end; i++)
 {
   char b[1024];
   char *p = b;

   if (i)
     *p++ = '|';
   else
     *p++ = '<';

   p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "U+%04X", info[i].codepoint));

   if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
     p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
   }

   if (i == end-1)
     *p++ = '>';

   unsigned int l = p - b;
   if (buf_size > l)
   {
     hb_memcpy (buf, b, l);
     buf += l;
     buf_size -= l;
     *buf_consumed += l;
     *buf = '\0';
   } else
     return i - start;
 }
 return end - start;
}

/**
* hb_buffer_serialize_glyphs:
* @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 glyph content,
* 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 glyphs will look something like:
*
* ```
* [uni0651=0@518,0+0|uni0628=0+1897]
* ```
*
* - The serialized glyphs are delimited with `[` and `]`.
* - Glyphs are separated with `|`
* - Each glyph starts with glyph name, or glyph index if
*   #HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set. Then,
*   - If #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, `=` then #hb_glyph_info_t.cluster.
*   - If #HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set, the #hb_glyph_position_t in the format:
*     - If #hb_glyph_position_t.x_offset and #hb_glyph_position_t.y_offset are not both 0, `@x_offset,y_offset`. Then,
*     - `+x_advance`, then `,y_advance` if #hb_glyph_position_t.y_advance is not 0. Then,
*   - If #HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set, the #hb_glyph_extents_t in the format `<x_bearing,y_bearing,width,height>`
*
* ## json
* A machine-readable, structured format.
* The serialized glyphs will look something like:
*
* ```
* [{"g":"uni0651","cl":0,"dx":518,"dy":0,"ax":0,"ay":0},
* {"g":"uni0628","cl":0,"dx":0,"dy":0,"ax":1897,"ay":0}]
* ```
*
* Each glyph is a JSON object, with the following properties:
* - `g`: the glyph name or glyph index if
*   #HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set.
* - `cl`: #hb_glyph_info_t.cluster if
*   #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.
* - `dx`,`dy`,`ax`,`ay`: #hb_glyph_position_t.x_offset, #hb_glyph_position_t.y_offset,
*    #hb_glyph_position_t.x_advance and #hb_glyph_position_t.y_advance
*    respectively, if #HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set.
* - `xb`,`yb`,`w`,`h`: #hb_glyph_extents_t.x_bearing, #hb_glyph_extents_t.y_bearing,
*    #hb_glyph_extents_t.width and #hb_glyph_extents_t.height respectively if
*    #HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set.
*
* Return value:
* The number of serialized items.
*
* Since: 0.9.7
**/
unsigned int
hb_buffer_serialize_glyphs (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)
{
 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-glyphs.hh"
#include "hb-buffer-deserialize-text-unicode.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 the full string was parsed, `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_glyphs (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 the full string was parsed, `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_unicode (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