diff options
Diffstat (limited to '')
| -rw-r--r-- | sbix.c | 132 |
1 files changed, 132 insertions, 0 deletions
@@ -0,0 +1,132 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +int +libparsesfnt_parse_sbix( + const char *data, size_t size, + struct libparsesfnt_sbix *infop, + const struct libparsesfnt_tabdir_entry *tag) +{ + return PARSE(LIBPARSESFNT_SBIX__, tag->offset, 0, 0, 0, 1, tag); +} + + +int +libparsesfnt_parse_sbix_v1_strike_offset_entries( + const char *data, size_t size, + uint32_t *infop, + const struct libparsesfnt_tabdir_entry *tag, + size_t first, size_t count) +{ + return PARSE("4", tag->offset, 8, 0, first, count, tag); +} + + +int +libparsesfnt_parse_sbix_v1_strike_entry( + const char *data, size_t size, + struct libparsesfnt_sbix_v1_strike_entry *infop, + const struct libparsesfnt_tabdir_entry *tag, size_t strike_offset) +{ + return PARSE(LIBPARSESFNT_SBIX_V1_STRIKE_ENTRY__, tag->offset, strike_offset, 0, 0, 1, tag); +} + + +int +libparsesfnt_parse_sbix_v1_glyph_data_offset_entries( + const char *data, size_t size, + uint32_t *infop, + const struct libparsesfnt_tabdir_entry *tag, size_t strike_offset, + size_t first, size_t count) +{ + return PARSE("4", tag->offset, strike_offset, 4, first, count, tag); +} + + +int +libparsesfnt_parse_sbix_v1_glyph_data_entry( + const char *data, size_t size, + struct libparsesfnt_sbix_v1_glyph_data_entry *infop, + const struct libparsesfnt_tabdir_entry *tag, + size_t strike_offset, size_t glyph_data_offset, size_t next_glyphs_data_offset) +{ + int ret; + size_t image_data_length; + if (next_glyphs_data_offset < glyph_data_offset) + goto ebfont; + image_data_length = next_glyphs_data_offset - glyph_data_offset; + if (!image_data_length) { + errno = EINVAL; + return -1; + } else if (image_data_length < 8) { + goto ebfont; + } + ret = PARSE(LIBPARSESFNT_SBIX_V1_GLYPH_DATA_ENTRY__, tag->offset, strike_offset, glyph_data_offset, 0, 1, tag); + if (!ret) { + infop->libparsesfnt_image_data_offset = (size_t)tag->offset + (size_t)strike_offset + (size_t)glyph_data_offset + 8; + infop->libparsesfnt_image_data_length = image_data_length - 8; + if (infop->libparsesfnt_image_data_length > size - infop->libparsesfnt_image_data_offset) + goto ebfont; + } + return ret; + +ebfont: + errno = EBFONT; + return -1; +} + + +int +libparsesfnt_parse_sbix_v1_image_data_dupe( + const char *data, size_t size, + struct libparsesfnt_sbix_v1_image_data_dupe *infop, + const struct libparsesfnt_sbix_v1_glyph_data_entry *glyph_data) +{ + return PARSE(LIBPARSESFNT_SBIX_V1_IMAGE_DATA_DUPE__, glyph_data->libparsesfnt_image_data_offset, 0, 0, 0, 1, NULL); +} + + +int +libparsesfnt_parse_sbix_v1_image_data_mask( + const char *data, size_t size, + struct libparsesfnt_sbix_v1_image_data_mask *infop, + const struct libparsesfnt_sbix_v1_glyph_data_entry *glyph_data) +{ + int ret; + if (glyph_data->libparsesfnt_image_data_length < 8 || + glyph_data->libparsesfnt_image_data_offset > SIZE_MAX - 8) + goto ebfont; + ret = PARSE(LIBPARSESFNT_SBIX_V1_IMAGE_DATA_MASK__, glyph_data->libparsesfnt_image_data_offset, 0, 0, 0, 1, NULL); + if (!ret) { + infop->libparsesfnt_image_data_offset = glyph_data->libparsesfnt_image_data_offset + 8; + infop->libparsesfnt_image_data_length = glyph_data->libparsesfnt_image_data_length - 8; + if (infop->libparsesfnt_image_data_length > size - infop->libparsesfnt_image_data_offset) + goto ebfont; + } + return ret; + +ebfont: + errno = EBFONT; + return -1; +} + + +int +libparsesfnt_parse_sbix_v1_mask( + const char *data, size_t size, + struct libparsesfnt_sbix_v1_mask *infop, + const struct libparsesfnt_tabdir_entry *tag, + const struct libparsesfnt_sbix_v1_image_data_mask *image_data) +{ + int ret; + ret = PARSE(LIBPARSESFNT_SBIX_V1_MASK__, tag->offset, image_data->mask_offset, 0, 0, 1, NULL); + if (!ret) { + infop->libparsesfnt_mask_offset = (size_t)tag->offset + (size_t)image_data->mask_offset + 16; + if ((size_t)infop->mask_length > size - infop->libparsesfnt_mask_offset) { + errno = EBFONT; + return -1; + } + } + return ret; +} |