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/* See LICENSE file for copyright and license details. */
#include "common.h"
int
libparsesfnt_parse_hdmx(
const char *data, size_t size,
struct libparsesfnt_hdmx *infop,
const struct libparsesfnt_tabdir_entry *tag)
{
int ret;
ret = PARSE(LIBPARSESFNT_HDMX__, tag->offset, 0, 0, 0, 1, tag);
if (!ret) {
if (!infop->record_size ||
(size_t)infop->num_records > (size_t)tag->length / (size_t)infop->record_size) {
errno = EBFONT;
return -1;
}
}
return ret;
}
int
libparsesfnt_parse_hdmx_entries(
const char *data, size_t size,
struct libparsesfnt_hdmx_v0_entry *infop,
const struct libparsesfnt_tabdir_entry *tag, const struct libparsesfnt_hdmx *hdmx,
size_t first, size_t count)
{
size_t off;
off = tag->offset;
if (off > size || 8 > size - off || hdmx->record_size < 2)
goto ebfont;
off += 8;
if (first > (size - off) / hdmx->record_size)
goto ebfont;
off += hdmx->record_size * first;
if (count > (size - off) / hdmx->record_size)
goto ebfont;
data = &data[off];
for (; count--; infop++) {
infop->pixel_size = ((const uint8_t *)data)[0];
infop->maximum_width = ((const uint8_t *)data)[1];
data = &data[2];
}
return 0;
ebfont:
errno = EBFONT;
return -1;
}
int
libparsesfnt_parse_hdmx_v0_subentry(
const char *data, size_t size,
uint8_t *widthp,
const struct libparsesfnt_tabdir_entry *tag, const struct libparsesfnt_hdmx *hdmx, size_t record,
size_t first, size_t count)
{
size_t off;
off = tag->offset;
if (off > size || 10 > size - off)
goto ebfont;
off += 10;
if (record > (size - off) / hdmx->record_size)
goto ebfont;
off += hdmx->record_size * record;
if (first > size - off)
goto ebfont;
off += first;
if (count > size - off)
goto ebfont;
if (2 > hdmx->record_size || first + count > hdmx->record_size - 2)
goto ebfont;
memcpy(widthp, &data[off], count);
return 0;
ebfont:
errno = EBFONT;
return -1;
}
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