107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
#include "hb-fuzzer.hh"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "hb-subset.h"
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static void
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trySubset (hb_face_t *face,
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const hb_codepoint_t text[],
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int text_length,
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bool drop_hints,
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bool drop_layout,
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bool retain_gids)
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{
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hb_subset_input_t *input = hb_subset_input_create_or_fail ();
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if (!input) return;
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hb_subset_input_set_drop_hints (input, drop_hints);
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hb_subset_input_set_retain_gids (input, retain_gids);
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hb_set_t *codepoints = hb_subset_input_unicode_set (input);
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if (!drop_layout)
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{
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hb_set_del (hb_subset_input_drop_tables_set (input), HB_TAG ('G', 'S', 'U', 'B'));
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hb_set_del (hb_subset_input_drop_tables_set (input), HB_TAG ('G', 'P', 'O', 'S'));
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hb_set_del (hb_subset_input_drop_tables_set (input), HB_TAG ('G', 'D', 'E', 'F'));
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}
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for (int i = 0; i < text_length; i++)
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hb_set_add (codepoints, text[i]);
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hb_face_t *result = hb_subset (face, input);
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{
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hb_blob_t *blob = hb_face_reference_blob (result);
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unsigned int length;
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const char *data = hb_blob_get_data (blob, &length);
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// Something not optimizable just to access all the blob data
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unsigned int bytes_count = 0;
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for (unsigned int i = 0; i < length; ++i)
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if (data[i]) ++bytes_count;
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assert (bytes_count || !length);
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hb_blob_destroy (blob);
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}
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hb_face_destroy (result);
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hb_subset_input_destroy (input);
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}
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static void
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trySubset (hb_face_t *face,
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const hb_codepoint_t text[],
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int text_length,
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const uint8_t flags[1])
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{
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bool drop_hints = flags[0] & (1 << 0);
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bool drop_layout = flags[0] & (1 << 1);
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bool retain_gids = flags[0] & (1 << 2);
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trySubset (face, text, text_length,
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drop_hints, drop_layout, retain_gids);
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}
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extern "C" int LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)
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{
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alloc_state = size; /* see src/failing-alloc.c */
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hb_blob_t *blob = hb_blob_create ((const char *) data, size,
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HB_MEMORY_MODE_READONLY, nullptr, nullptr);
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hb_face_t *face = hb_face_create (blob, 0);
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/* Just test this API here quickly. */
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hb_set_t *output = hb_set_create ();
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hb_face_collect_unicodes (face, output);
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hb_set_destroy (output);
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uint8_t flags[1] = {0};
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const hb_codepoint_t text[] =
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{
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'A', 'B', 'C', 'D', 'E', 'X', 'Y', 'Z', '1', '2',
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'3', '@', '_', '%', '&', ')', '*', '$', '!'
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};
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trySubset (face, text, sizeof (text) / sizeof (hb_codepoint_t), flags);
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hb_codepoint_t text_from_data[16];
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if (size > sizeof (text_from_data) + sizeof (flags)) {
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memcpy (text_from_data,
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data + size - sizeof (text_from_data),
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sizeof (text_from_data));
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memcpy (flags,
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data + size - sizeof (text_from_data) - sizeof (flags),
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sizeof (flags));
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unsigned int text_size = sizeof (text_from_data) / sizeof (hb_codepoint_t);
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trySubset (face, text_from_data, text_size, flags);
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}
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hb_face_destroy (face);
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hb_blob_destroy (blob);
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return 0;
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}
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