The Tor Browser: gfx/harfbuzz/src/hb-buffer-serialize.cc@925c144e1f1f (annotated)

gfx/harfbuzz/src/hb-buffer-serialize.cc@925c144e1f1f (annotated)

gfx/harfbuzz/src/hb-buffer-serialize.cc

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.

 /*
  * 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-buffer-private.hh"
 static const char *serialize_formats[] = {
   "text",
   "json",
   NULL
 };
 /**
  * hb_buffer_serialize_list_formats:
  *
  *
  *
  * Return value: (transfer none):
  *
  * Since: 1.0
  **/
 const char **
 hb_buffer_serialize_list_formats (void)
 {
   return serialize_formats;
 }
 /**
  * hb_buffer_serialize_format_from_string:
  * @str:
  * @len:
  *
  *
  *
  * Return value:
  *
  * Since: 1.0
  **/
 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) & ~0x20202020);
 }
 /**
  * hb_buffer_serialize_format_to_string:
  * @format:
  *
  *
  *
  * Return value:
  *
  * Since: 1.0
  **/
 const char *
 hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format)
 {
   switch (format)
   {
     case HB_BUFFER_SERIALIZE_FORMAT_TEXT:	return serialize_formats[0];
     case HB_BUFFER_SERIALIZE_FORMAT_JSON:	return serialize_formats[1];
     default:
     case HB_BUFFER_SERIALIZE_FORMAT_INVALID:	return NULL;
   }
 }
 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, NULL);
   hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, NULL);
   *buf_consumed = 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++ = ',';
     *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 (*q == '"')
 	  *p++ = '\\';
 	*p++ = *q;
       }
       *p++ = '"';
     }
     else
       p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
     if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
       p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
     }
     if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
     {
       p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"dx\":%d,\"dy\":%d",
 		     pos[i].x_offset, pos[i].y_offset);
       p += snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"ax\":%d,\"ay\":%d",
 		     pos[i].x_advance, pos[i].y_advance);
     }
     *p++ = '}';
     unsigned int l = p - b;
     if (buf_size > l)
     {
       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, NULL);
   hb_glyph_position_t *pos = hb_buffer_get_glyph_positions (buffer, NULL);
   *buf_consumed = 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++ = '|';
     if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
     {
       hb_font_glyph_to_string (font, info[i].codepoint, p, 128);
       p += strlen (p);
     }
     else
       p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
     if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
       p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
     }
     if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
     {
       if (pos[i].x_offset || pos[i].y_offset)
 	p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", pos[i].x_offset, pos[i].y_offset));
       *p++ = '+';
       p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance));
       if (pos[i].y_advance)
 	p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",%d", pos[i].y_advance));
     }
     unsigned int l = p - b;
     if (buf_size > l)
     {
       memcpy (buf, b, l);
       buf += l;
       buf_size -= l;
       *buf_consumed += l;
       *buf = '\0';
     } else
       return i - start;
   }
   return end - start;
 }
 /* Returns number of items, starting at start, that were serialized. */
 /**
  * hb_buffer_serialize_glyphs:
  * @buffer: a buffer.
  * @start:
  * @end:
  * @buf: (array length=buf_size):
  * @buf_size:
  * @buf_consumed: (out):
  * @font:
  * @format:
  * @flags:
  *
  *
  *
  * Return value:
  *
  * Since: 1.0
  **/
 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, /* May be NULL */
 			    hb_font_t *font, /* May be NULL */
 			    hb_buffer_serialize_format_t format,
 			    hb_buffer_serialize_flags_t flags)
 {
   assert (start <= end && end <= buffer->len);
   unsigned int sconsumed;
   if (!buf_consumed)
     buf_consumed = &sconsumed;
   *buf_consumed = 0;
   assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
 	  buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
   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;
   }
 }
 static hb_bool_t
 parse_uint (const char *pp, const char *end, uint32_t *pv)
 {
   char buf[32];
   unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp));
   strncpy (buf, pp, len);
   buf[len] = '\0';
   char *p = buf;
   char *pend = p;
   uint32_t v;
   errno = 0;
   v = strtol (p, &pend, 10);
   if (errno || p == pend || pend - p != end - pp)
     return false;
   *pv = v;
   return true;
 }
 static hb_bool_t
 parse_int (const char *pp, const char *end, int32_t *pv)
 {
   char buf[32];
   unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp));
   strncpy (buf, pp, len);
   buf[len] = '\0';
   char *p = buf;
   char *pend = p;
   int32_t v;
   errno = 0;
   v = strtol (p, &pend, 10);
   if (errno || p == pend || pend - p != end - pp)
     return false;
   *pv = v;
   return true;
 }
 #include "hb-buffer-deserialize-json.hh"
 #include "hb-buffer-deserialize-text.hh"
 /**
  * hb_buffer_deserialize_glyphs:
  * @buffer: a buffer.
  * @buf: (array length=buf_len):
  * @buf_len:
  * @end_ptr: (out):
  * @font:
  * @format:
  *
  *
  *
  * Return value:
  *
  * Since: 1.0
  **/
 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;
   assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
 	  buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
   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_glyphs_text (buffer,
 						 buf, buf_len, end_ptr,
 						 font);
     case HB_BUFFER_SERIALIZE_FORMAT_JSON:
       return _hb_buffer_deserialize_glyphs_json (buffer,
 						 buf, buf_len, end_ptr,
 						 font);
     default:
     case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
       return false;
   }
 }

The Tor Browser / annotate

gfx/harfbuzz/src/hb-buffer-serialize.cc@925c144e1f1f (annotated)

gfx/harfbuzz/src/hb-buffer-serialize.cc