/*
* Copyright © 2019 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Garret Rieger
*/
#include "options.hh"
#include "hb-subset-input.hh"
static gboolean
parse_gids (const char *name G_GNUC_UNUSED,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
subset_options_t *subset_opts = (subset_options_t *) data;
hb_set_t *gids = subset_opts->input->glyphs;
char *s = (char *) arg;
char *p;
while (s && *s)
{
while (*s && strchr (", ", *s))
s++;
if (!*s)
break;
errno = 0;
hb_codepoint_t start_code = strtoul (s, &p, 10);
if (s[0] == '-' || errno || s == p)
{
hb_set_destroy (gids);
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Failed parsing gids values at: '%s'", s);
return false;
}
if (p && p[0] == '-') //gid ranges
{
s = ++p;
hb_codepoint_t end_code = strtoul (s, &p, 10);
if (s[0] == '-' || errno || s == p)
{
hb_set_destroy (gids);
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Failed parsing gids values at: '%s'", s);
return false;
}
if (end_code < start_code)
{
hb_set_destroy (gids);
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Invalid gids range value %u-%u", start_code, end_code);
return false;
}
hb_set_add_range (gids, start_code, end_code);
}
else
{
hb_set_add (gids, start_code);
}
s = p;
}
return true;
}
static gboolean
parse_nameids (const char *name,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
subset_options_t *subset_opts = (subset_options_t *) data;
hb_set_t *name_ids = subset_opts->input->name_ids;
char last_name_char = name[strlen (name) - 1];
if (last_name_char != '+' && last_name_char != '-')
hb_set_clear (name_ids);
if (0 == strcmp (arg, "*"))
{
if (last_name_char == '-')
hb_set_del_range (name_ids, 0, 0x7FFF);
else
hb_set_add_range (name_ids, 0, 0x7FFF);
return true;
}
char *s = (char *) arg;
char *p;
while (s && *s)
{
while (*s && strchr (", ", *s))
s++;
if (!*s)
break;
errno = 0;
hb_codepoint_t u = strtoul (s, &p, 10);
if (errno || s == p)
{
hb_set_destroy (name_ids);
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Failed parsing nameID values at: '%s'", s);
return false;
}
if (last_name_char != '-')
{
hb_set_add (name_ids, u);
} else {
hb_set_del (name_ids, u);
}
s = p;
}
return true;
}
static gboolean
parse_name_languages (const char *name,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
subset_options_t *subset_opts = (subset_options_t *) data;
hb_set_t *name_languages = subset_opts->input->name_languages;
char last_name_char = name[strlen (name) - 1];
if (last_name_char != '+' && last_name_char != '-')
hb_set_clear (name_languages);
if (0 == strcmp (arg, "*"))
{
if (last_name_char == '-')
hb_set_del_range (name_languages, 0, 0x5FFF);
else
hb_set_add_range (name_languages, 0, 0x5FFF);
return true;
}
char *s = (char *) arg;
char *p;
while (s && *s)
{
while (*s && strchr (", ", *s))
s++;
if (!*s)
break;
errno = 0;
hb_codepoint_t u = strtoul (s, &p, 10);
if (errno || s == p)
{
hb_set_destroy (name_languages);
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Failed parsing name_languages values at: '%s'", s);
return false;
}
if (last_name_char != '-')
{
hb_set_add (name_languages, u);
} else {
hb_set_del (name_languages, u);
}
s = p;
}
return true;
}
static gboolean
parse_drop_tables (const char *name,
const char *arg,
gpointer data,
GError **error G_GNUC_UNUSED)
{
subset_options_t *subset_opts = (subset_options_t *) data;
hb_set_t *drop_tables = subset_opts->input->drop_tables;
char last_name_char = name[strlen (name) - 1];
if (last_name_char != '+' && last_name_char != '-')
hb_set_clear (drop_tables);
char *s = strtok((char *) arg, ", ");
while (s)
{
if (strlen (s) > 4) // Table tags are at most 4 bytes.
{
g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
"Failed parsing table tag values at: '%s'", s);
return false;
}
hb_tag_t tag = hb_tag_from_string (s, strlen (s));
if (last_name_char != '-')
hb_set_add (drop_tables, tag);
else
hb_set_del (drop_tables, tag);
s = strtok(nullptr, ", ");
}
return true;
}
void
subset_options_t::add_options (option_parser_t *parser)
{
GOptionEntry entries[] =
{
{"no-hinting", 0, 0, G_OPTION_ARG_NONE, &this->input->drop_hints, "Whether to drop hints", nullptr},
{"retain-gids", 0, 0, G_OPTION_ARG_NONE, &this->input->retain_gids, "If set don't renumber glyph ids in the subset.", nullptr},
{"gids", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_gids, "Specify glyph IDs or ranges to include in the subset", "list of comma/whitespace-separated int numbers or ranges"},
{"desubroutinize", 0, 0, G_OPTION_ARG_NONE, &this->input->desubroutinize, "Remove CFF/CFF2 use of subroutines", nullptr},
{"name-IDs", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_nameids, "Subset specified nameids", "list of int numbers"},
{"name-legacy", 0, 0, G_OPTION_ARG_NONE, &this->input->name_legacy, "Keep legacy (non-Unicode) 'name' table entries", nullptr},
{"name-languages", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_name_languages, "Subset nameRecords with specified language IDs", "list of int numbers"},
{"drop-tables", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables, "Drop the specified tables.", "list of string table tags."},
{"drop-tables+", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables, "Drop the specified tables.", "list of string table tags."},
{"drop-tables-", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_drop_tables, "Drop the specified tables.", "list of string table tags."},
{nullptr}
};
parser->add_group (entries,
"subset",
"Subset options:",
"Options subsetting",
this);
}
