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[buffer] Buffer start <= end <= len requirement in (de-)serialize

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This commit is contained in:
Behdad Esfahbod 2020-10-09 17:58:57 -06:00
parent 3b64122a7f
commit 8f5d8b155c
1 changed files with 4 additions and 2 deletions
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6
src/hb-buffer-serialize.cc
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@ -464,7 +464,8 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
hb_buffer_serialize_format_t format, hb_buffer_serialize_format_t format,
hb_buffer_serialize_flags_t flags) hb_buffer_serialize_flags_t flags)
{ {
assert (start <= end && end <= buffer->len); end = hb_clamp (end, start, buffer->len);
start = hb_min (start, end);
unsigned int sconsumed; unsigned int sconsumed;
if (!buf_consumed) if (!buf_consumed)
@ -561,7 +562,8 @@ hb_buffer_serialize_unicode (hb_buffer_t *buffer,
hb_buffer_serialize_format_t format, hb_buffer_serialize_format_t format,
hb_buffer_serialize_flags_t flags) hb_buffer_serialize_flags_t flags)
{ {
assert (start <= end && end <= buffer->len); end = hb_clamp (end, start, buffer->len);
start = hb_min (start, end);
unsigned int sconsumed; unsigned int sconsumed;
if (!buf_consumed) if (!buf_consumed)