diff options
Diffstat (limited to '')
| -rw-r--r-- | bloc.c | 155 |
1 files changed, 155 insertions, 0 deletions
@@ -0,0 +1,155 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +int +libparsesfnt_parse_bloc( + const char *data, size_t size, + struct libparsesfnt_bloc *infop, + const struct libparsesfnt_tabdir_entry *tag) +{ + return PARSE(LIBPARSESFNT_BLOC__, tag->offset, 0, 0, 0, 1, tag); +} + + +int +libparsesfnt_parse_bloc_v2_0_size_entries( + const char *data, size_t size, + struct libparsesfnt_bloc_v2_0_size_entry *infop, + const struct libparsesfnt_tabdir_entry *tag, + size_t first, size_t count) +{ + return PARSE(LIBPARSESFNT_BLOC_V2_0_SIZE_ENTRY__, tag->offset, 8, 0, first, count, tag); +} + + +int +libparsesfnt_parse_bloc_v2_0_index_entries( + const char *data, size_t size, + struct libparsesfnt_bloc_v2_0_index_entry *infop, + const struct libparsesfnt_tabdir_entry *tag, + const struct libparsesfnt_bloc_v2_0_size_entry *size_entry, + size_t first, size_t count) +{ + return PARSE(LIBPARSESFNT_BLOC_V2_0_INDEX_ENTRY__, tag->offset, size_entry->index_subtable_array_offset, + 0, first, count, tag); +} + + +int +libparsesfnt_parse_bloc_v2_0_index_subentry( + const char *data, size_t size, + struct libparsesfnt_bloc_v2_0_index_subentry *infop, + const struct libparsesfnt_tabdir_entry *tag, + const struct libparsesfnt_bloc_v2_0_size_entry *size_entry, + const struct libparsesfnt_bloc_v2_0_index_entry *index_entry) +{ + return PARSE(LIBPARSESFNT_BLOC_V2_0_INDEX_SUBENTRY__, tag->offset, size_entry->index_subtable_array_offset, + index_entry->additional_offset_to_index_subtable, 0, 1, tag); +} + + +int +libparsesfnt_parse_bloc_v2_0_format_1_offset_entries( + const char *data, size_t size, + uint32_t *infop, + const struct libparsesfnt_tabdir_entry *tag, + const struct libparsesfnt_bloc_v2_0_size_entry *size_entry, + const struct libparsesfnt_bloc_v2_0_index_entry *index_entry, + size_t first, size_t count) +{ + return PARSE("4", (size_t)tag->offset + (size_t)size_entry->index_subtable_array_offset, + index_entry->additional_offset_to_index_subtable, 8, first, count, tag); +} + + +int +libparsesfnt_parse_bloc_v2_0_format_2_header( + const char *data, size_t size, + struct libparsesfnt_bloc_v2_0_index_subentry_format_2_header *infop, + const struct libparsesfnt_tabdir_entry *tag, + const struct libparsesfnt_bloc_v2_0_size_entry *size_entry, + const struct libparsesfnt_bloc_v2_0_index_entry *index_entry) +{ + int ret; + ret = PARSE(LIBPARSESFNT_BLOC_V2_0_INDEX_SUBENTRY_FORMAT_2_HEADER__, + (size_t)tag->offset + (size_t)size_entry->index_subtable_array_offset, + index_entry->additional_offset_to_index_subtable, 8, 0, 1, tag); + if (!ret) { + if (!infop->image_size) { + errno = EBFONT; + return -1; + } + } + return ret; +} + + +int +libparsesfnt_parse_bloc_v2_0_format_3_offset_entries( + const char *data, size_t size, + uint16_t *infop, + const struct libparsesfnt_tabdir_entry *tag, + const struct libparsesfnt_bloc_v2_0_size_entry *size_entry, + const struct libparsesfnt_bloc_v2_0_index_entry *index_entry, + size_t first, size_t count) +{ + return PARSE("2", (size_t)tag->offset + (size_t)size_entry->index_subtable_array_offset, + index_entry->additional_offset_to_index_subtable, 8, first, count, tag); +} + + +int +libparsesfnt_get_bloc_v2_0_format_1_offset( + size_t *offsetp, + const uint32_t offset, + const struct libparsesfnt_bloc_v2_0_index_subentry *subentry) +{ +#if SIZE_MAX == UINT32_MAX /* we know that SIZE_MAX >= UINT32_MAX */ + if (offset > UINT32_MAX - subentry->image_data_offset) { + errno = EFBIG; + return -1; + } +#endif + *offsetp = (size_t)offset + (size_t)subentry->image_data_offset; + return 0; +} + + +int +libparsesfnt_get_bloc_v2_0_format_2_offset( + size_t *offsetp, + size_t glyph_index, + const struct libparsesfnt_bloc_v2_0_index_entry *entry, + const struct libparsesfnt_bloc_v2_0_index_subentry *subentry, + struct libparsesfnt_bloc_v2_0_index_subentry_format_2_header *header) +{ + if (glyph_index < (size_t)entry->first_glyph_index) { + errno = EINVAL; + return -1; + } + *offsetp = glyph_index - (size_t)entry->first_glyph_index; + if (*offsetp > (SIZE_MAX - (size_t)subentry->image_data_offset) / (size_t)header->image_size) { + errno = EFBIG; + return -1; + } + *offsetp = *offsetp * header->image_size + subentry->image_data_offset; + return 0; +} + + +int +libparsesfnt_get_bloc_v2_0_format_3_offset( + size_t *offsetp, + const uint16_t offset, + const struct libparsesfnt_bloc_v2_0_index_subentry *subentry) +{ +#if SIZE_MAX == UINT32_MAX /* we know that SIZE_MAX >= UINT32_MAX */ + if ((uint32_t)offset > UINT32_MAX - subentry->image_data_offset) { + errno = EFBIG; + return -1; + } +#endif + *offsetp = (size_t)offset + (size_t)subentry->image_data_offset; + return 0; +} |