HarfBuzz text shaping engine
http://harfbuzz.github.io/
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86 lines
2.2 KiB
86 lines
2.2 KiB
#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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unsigned flag_bits) |
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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_flags (input, (hb_subset_flags_t) flag_bits); |
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hb_set_t *codepoints = hb_subset_input_unicode_set (input); |
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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_or_fail (face, input); |
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if (result) |
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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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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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unsigned flags = HB_SUBSET_FLAGS_DEFAULT; |
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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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