From 52f4424f2dcffa5e20e55c52a5777ce9212d05c5 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 29 Oct 2021 23:00:19 +0200 Subject: First commit MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libparsepcf_get_encoding.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 libparsepcf_get_encoding.c (limited to 'libparsepcf_get_encoding.c') diff --git a/libparsepcf_get_encoding.c b/libparsepcf_get_encoding.c new file mode 100644 index 0000000..34ccd9b --- /dev/null +++ b/libparsepcf_get_encoding.c @@ -0,0 +1,44 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +int +libparsepcf_get_encoding(const char *file, size_t size, + const struct libparsepcf_table *table, + struct libparsepcf_encoding *out) +{ + int msb = table->format & LIBPARSEPCF_BYTE; + size_t pos; + + (void) size; + + if (table->size < 14) + goto ebfont; + + pos = table->offset; + + if (table->format != libparsepcf_parse_lsb_uint32__(&file[pos])) + goto ebfont; + pos += 4; + + out->min_byte2 = PARSE_UINT16(&file[pos + 0], msb); + out->max_byte2 = PARSE_UINT16(&file[pos + 2], msb); + out->min_byte1 = PARSE_UINT16(&file[pos + 4], msb); + out->max_byte1 = PARSE_UINT16(&file[pos + 6], msb); + out->default_char = PARSE_UINT16(&file[pos + 8], msb); + pos += 10; + + if (out->min_byte2 > out->max_byte2 || out->max_byte2 > 255 || + out->min_byte1 > out->max_byte1 || out->max_byte1 > 255) + goto ebfont; + + out->glyph_count = (size_t)(out->max_byte2 - out->min_byte2 + 1) * (size_t)(out->max_byte1 - out->min_byte1 + 1); + if (out->glyph_count > table->size - (pos - table->offset) / 2) + goto ebfont; + + return 0; + +ebfont: + errno = EBFONT; + return -1; +} -- cgit v1.2.3-70-g09d2