Check in new file sfnt.c

Check in new file sfnt.c

* src/sfnt.c (xmalloc, xrealloc, xfree, eassert, MIN)
(sfnt_table_names, SFNT_ENDOF, struct sfnt_table_directory)
(enum sfnt_scaler_type, sfnt_coerce_fixed, struct sfnt_hhea_table)
(struct sfnt_cmap_table, enum sfnt_platform_id)
(enum sfnt_unicode_platform_specific_id)
(enum sfnt_macintosh_platform_specific_id)
(enum sfnt_microsoft_platform_specific_id)
(struct sfnt_cmap_encoding_subtable)
(struct sfnt_cmap_encoding_subtable_data)
(struct sfnt_cmap_format_0, struct sfnt_cmap_format_2_subheader)
(struct sfnt_cmap_format_2, struct sfnt_cmap_format_4)
(struct sfnt_cmap_format_6, struct sfnt_cmap_format_8_or_12_group)
(struct sfnt_cmap_format_8, struct sfnt_cmap_format_12)
(struct sfnt_maxp_table, struct sfnt_loca_table_short)
(struct sfnt_loca_table_long, struct sfnt_glyf_table)
(struct sfnt_simple_glyph, struct sfnt_compound_glyph_component)
(struct sfnt_compound_glyph, struct sfnt_glyph, _sfnt_swap16)
(_sfnt_swap32, sfnt_swap16, sfnt_find_table)
(sfnt_read_cmap_format_0, sfnt_read_cmap_format_2)
(sfnt_read_cmap_format_4, sfnt_read_cmap_format_6)
(sfnt_read_cmap_format_8, sfnt_read_cmap_format_12)
(sfnt_read_cmap_table_1, sfnt_read_cmap_table, sfnt_lookup_glyph_0)
(sfnt_lookup_glyph_2, sfnt_bsearch_above, sfnt_compare_uint16)
(sfnt_lookup_glyph_4, sfnt_lookup_glyph_6, sfnt_lookup_glyph_8)
(sfnt_lookup_glyph_12, sfnt_lookup_glyph, sfnt_read_head_table)
(sfnt_read_hhea_table, sfnt_read_loca_table_short)
(sfnt_read_loca_table_long, sfnt_read_maxp_table)
(sfnt_read_glyf_table, sfnt_read_simple_glyph)
(sfnt_read_compound_glyph, sfnt_read_glyph, sfnt_free_glyph)
(struct sfnt_point, sfnt_transform_coordinates)
(struct sfnt_compound_glyph_context)
(sfnt_expand_compound_glyph_context, sfnt_round_fixed)
(sfnt_decompose_compound_glyph, sfnt_lerp_half)
(sfnt_decompose_glyph, struct sfnt_glyph_outline)
(enum sfnt_glyph_outline_flags)
(struct sfnt_build_glyph_outline_context, sfnt_build_append)
(sfnt_move_to_and_build, sfnt_line_to_and_build, sfnt_mul_fixed)
(sfnt_div_fixed, sfnt_ceil_fixed, sfnt_floor_fixed)
(sfnt_curve_is_flat, sfnt_curve_to_and_build_1)
(sfnt_curve_to_and_build, sfnt_build_glyph_outline)
(struct sfnt_raster, struct sfnt_edge, sfnt_poly_coverage)
(sfnt_poly_grid_ceil, sfnt_prepare_raster, sfnt_step_edge_by)
(sfnt_build_outline_edges, sfnt_compare_edges, sfnt_poly_edges)
(sfnt_saturate_short, sfnt_fill_span, sfnt_poly_span)
(sfnt_raster_span, sfnt_raster_edge, sfnt_raster_glyph_outline)
(struct sfnt_long_hor_metric, struct sfnt_hmtx_table)
(struct sfnt_glyph_metrics, sfnt_read_hmtx_table)
(sfnt_lookup_glyph_metrics, struct sfnt_test_dcontext)
(sfnt_test_move_to, sfnt_test_line_to, sfnt_test_curve_to)
(sfnt_test_get_glyph, sfnt_test_free_glyph, sfnt_test_span)
(sfnt_test_edge, sfnt_test_raster, main): Check in
5000-line-long file written by me for reading TrueType and
OpenType fonts with TrueType outlines.