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/* 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;
}
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