[Git][freetype/freetype][master] [lzw] Preserve decompression stack when relocating to heap.

[Alexei Podtelezhnikov (@apodtele)]

Alexei Podtelezhnikov pushed to branch master at FreeType / FreeType

Commits:

• f631542d
  by Alexei Podtelezhnikov at 2021-04-27T11:39:58-04:00

  [lzw] Preserve decompression stack when relocating to heap.
  
  * src/lzw/ftzopen.c (ft_lzwstate_stack_grow): Copy stack when
  relocating to heap.
  

2 changed files:

• ChangeLog
• src/lzw/ftzopen.c

Changes:

ChangeLog

---

	1	+2021-04-27 Alexei Podtelezhnikov <apodtele@gmail.com>
	2	+
	3	+ [lzw] Preserve decompression stack when relocating to heap.
	4	+
	5	+ * src/lzw/ftzopen.c (ft_lzwstate_stack_grow): Copy stack when
	6	+ relocating to heap.
	7	+
1	8	2021-04-27 Alexei Podtelezhnikov <apodtele@gmail.com>
2	9
3	10	* src/cid/cidgload.c (cid_load_glyph): Restore the glyph_length check.

src/lzw/ftzopen.c

---

...	...	@@ -127,6 +127,7 @@
127	127
128	128	new_size = new_size + ( new_size >> 1 ) + 4;
129	129
	130	+ /* if relocating to heap */
130	131	if ( state->stack == state->stack_0 )
131	132	{
132	133	state->stack = NULL;
...	...	@@ -142,9 +143,13 @@
142	143	return -1;
143	144	}
144	145
145		- if ( FT_RENEW_ARRAY( state->stack, old_size, new_size ) )
	146	+ if ( FT_QRENEW_ARRAY( state->stack, old_size, new_size ) )
146	147	return -1;
147	148
	149	+ /* if relocating to heap */
	150	+ if ( old_size == 0 )
	151	+ FT_MEM_COPY( state->stack, state->stack_0, FT_LZW_DEFAULT_STACK_SIZE );
	152	+
148	153	state->stack_size = new_size;
149	154	}
150	155	return 0;

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