Better size overflow checking for sfnt.c

* src/sfnt.c (memory_full_up) [TEST]: New static function.
(xmalloc, xcalloc, xrealloc): Use it instead of aborting.
(eassert) [TEST]: Remove; no longer needed.
(xaddmalloc, xaddrealloc): New static convenience functions.
(sfnt_read_cmap_format_12, sfnt_read_loca_table_short)
(sfnt_read_loca_table_long, sfnt_read_glyf_table)
(sfnt_read_simple_glyph, sfnt_read_compound_glyph)
(sfnt_read_glyph, sfnt_build_append, sfnt_build_outline_edges)
(sfnt_raster_glyph_outline, sfnt_build_outline_fedges)
(sfnt_raster_glyph_outline_exact, sfnt_read_hmtx_table)
(sfnt_read_name_table, sfnt_read_meta_table)
(sfnt_read_ttc_header, sfnt_read_fpgm_table)
(sfnt_read_prep_table, sfnt_create_uvs_context)
(sfnt_read_gvar_table, sfnt_read_packed_deltas)
(sfnt_vary_simple_glyph, sfnt_vary_compound_glyph):
Use the new functions to test for size overflow more reliably.
Use a cleaner way to decide whether a pointer addresses
the heap not the stack and thus needs freeing.
Fix a few more unlikely overflows.
(sfnt_read_cmap_format_12): The recently-added eassert is no
longer needed, so remove it.
(sfnt_read_simple_glyph): Initialize glyph->simple early
to simplify later code, as is done in similar functions.
Complicate size test to avoid potential unsigned overflow.

0 files changed, 0 insertions, 0 deletions